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[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/fs_struct.h>
56
57 #include "nfs4_fs.h"
58 #include "internal.h"
59 #include "nfs4idmap.h"
60 #include "nfs4session.h"
61 #include "pnfs.h"
62 #include "netns.h"
63
64 #define NFSDBG_FACILITY NFSDBG_XDR
65
66 /* Mapping from NFS error code to "errno" error code. */
67 #define errno_NFSERR_IO EIO
68
69 static int nfs4_stat_to_errno(int);
70
71 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
72 #ifdef DEBUG
73 #define NFS4_MAXTAGLEN 20
74 #else
75 #define NFS4_MAXTAGLEN 0
76 #endif
77
78 /* lock,open owner id:
79 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
80 */
81 #define open_owner_id_maxsz (1 + 2 + 1 + 1 + 2)
82 #define lock_owner_id_maxsz (1 + 1 + 4)
83 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
84 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
85 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
86 #define op_encode_hdr_maxsz (1)
87 #define op_decode_hdr_maxsz (2)
88 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
89 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
90 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
91 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
92 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
93 (NFS4_FHSIZE >> 2))
94 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
95 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
96 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
97 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
98 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
99 ((3+NFS4_FHSIZE) >> 2))
100 #define nfs4_fattr_bitmap_maxsz 4
101 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
102 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
103 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
104 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
105 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
106 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
107 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
108 #define nfs4_label_maxsz (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
109 #else
110 #define nfs4_label_maxsz 0
111 #endif
112 /* We support only one layout type per file system */
113 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
114 /* This is based on getfattr, which uses the most attributes: */
115 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
116 3 + 3 + 3 + nfs4_owner_maxsz + \
117 nfs4_group_maxsz + nfs4_label_maxsz + \
118 decode_mdsthreshold_maxsz))
119 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
120 nfs4_fattr_value_maxsz)
121 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
122 #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
123 1 + 2 + 1 + \
124 nfs4_owner_maxsz + \
125 nfs4_group_maxsz + \
126 nfs4_label_maxsz + \
127 4 + 4)
128 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
129 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
130 #define encode_restorefh_maxsz (op_encode_hdr_maxsz)
131 #define decode_restorefh_maxsz (op_decode_hdr_maxsz)
132 #define encode_fsinfo_maxsz (encode_getattr_maxsz)
133 /* The 5 accounts for the PNFS attributes, and assumes that at most three
134 * layout types will be returned.
135 */
136 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + \
137 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
138 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
139 #define decode_renew_maxsz (op_decode_hdr_maxsz)
140 #define encode_setclientid_maxsz \
141 (op_encode_hdr_maxsz + \
142 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
143 /* client name */ \
144 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
145 1 /* sc_prog */ + \
146 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
147 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
148 1) /* sc_cb_ident */
149 #define decode_setclientid_maxsz \
150 (op_decode_hdr_maxsz + \
151 2 /* clientid */ + \
152 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
153 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
154 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
155 #define encode_setclientid_confirm_maxsz \
156 (op_encode_hdr_maxsz + \
157 3 + (NFS4_VERIFIER_SIZE >> 2))
158 #define decode_setclientid_confirm_maxsz \
159 (op_decode_hdr_maxsz)
160 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
161 #define decode_lookup_maxsz (op_decode_hdr_maxsz)
162 #define encode_share_access_maxsz \
163 (2)
164 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
165 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
166 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
167 #define encode_open_maxsz (op_encode_hdr_maxsz + \
168 2 + encode_share_access_maxsz + 2 + \
169 open_owner_id_maxsz + \
170 encode_opentype_maxsz + \
171 encode_claim_null_maxsz)
172 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
173 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
174 decode_ace_maxsz)
175 #define decode_change_info_maxsz (5)
176 #define decode_open_maxsz (op_decode_hdr_maxsz + \
177 decode_stateid_maxsz + \
178 decode_change_info_maxsz + 1 + \
179 nfs4_fattr_bitmap_maxsz + \
180 decode_delegation_maxsz)
181 #define encode_open_confirm_maxsz \
182 (op_encode_hdr_maxsz + \
183 encode_stateid_maxsz + 1)
184 #define decode_open_confirm_maxsz \
185 (op_decode_hdr_maxsz + \
186 decode_stateid_maxsz)
187 #define encode_open_downgrade_maxsz \
188 (op_encode_hdr_maxsz + \
189 encode_stateid_maxsz + 1 + \
190 encode_share_access_maxsz)
191 #define decode_open_downgrade_maxsz \
192 (op_decode_hdr_maxsz + \
193 decode_stateid_maxsz)
194 #define encode_close_maxsz (op_encode_hdr_maxsz + \
195 1 + encode_stateid_maxsz)
196 #define decode_close_maxsz (op_decode_hdr_maxsz + \
197 decode_stateid_maxsz)
198 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
199 encode_stateid_maxsz + \
200 encode_attrs_maxsz)
201 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
202 nfs4_fattr_bitmap_maxsz)
203 #define encode_read_maxsz (op_encode_hdr_maxsz + \
204 encode_stateid_maxsz + 3)
205 #define decode_read_maxsz (op_decode_hdr_maxsz + 2)
206 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
207 2 + encode_verifier_maxsz + 5 + \
208 nfs4_label_maxsz)
209 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
210 decode_verifier_maxsz)
211 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
212 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
213 #define encode_write_maxsz (op_encode_hdr_maxsz + \
214 encode_stateid_maxsz + 4)
215 #define decode_write_maxsz (op_decode_hdr_maxsz + \
216 2 + decode_verifier_maxsz)
217 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
218 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
219 decode_verifier_maxsz)
220 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
221 nfs4_name_maxsz)
222 #define decode_remove_maxsz (op_decode_hdr_maxsz + \
223 decode_change_info_maxsz)
224 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
225 2 * nfs4_name_maxsz)
226 #define decode_rename_maxsz (op_decode_hdr_maxsz + \
227 decode_change_info_maxsz + \
228 decode_change_info_maxsz)
229 #define encode_link_maxsz (op_encode_hdr_maxsz + \
230 nfs4_name_maxsz)
231 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
232 #define encode_lockowner_maxsz (7)
233 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
234 7 + \
235 1 + encode_stateid_maxsz + 1 + \
236 encode_lockowner_maxsz)
237 #define decode_lock_denied_maxsz \
238 (8 + decode_lockowner_maxsz)
239 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
240 decode_lock_denied_maxsz)
241 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
242 encode_lockowner_maxsz)
243 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
244 decode_lock_denied_maxsz)
245 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
246 encode_stateid_maxsz + \
247 4)
248 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
249 decode_stateid_maxsz)
250 #define encode_release_lockowner_maxsz \
251 (op_encode_hdr_maxsz + \
252 encode_lockowner_maxsz)
253 #define decode_release_lockowner_maxsz \
254 (op_decode_hdr_maxsz)
255 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
256 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
257 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
258 1 + nfs4_name_maxsz + \
259 1 + \
260 nfs4_fattr_maxsz)
261 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
262 #define encode_create_maxsz (op_encode_hdr_maxsz + \
263 1 + 2 + nfs4_name_maxsz + \
264 encode_attrs_maxsz)
265 #define decode_create_maxsz (op_decode_hdr_maxsz + \
266 decode_change_info_maxsz + \
267 nfs4_fattr_bitmap_maxsz)
268 #define encode_statfs_maxsz (encode_getattr_maxsz)
269 #define decode_statfs_maxsz (decode_getattr_maxsz)
270 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
271 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
272 #define encode_getacl_maxsz (encode_getattr_maxsz)
273 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
274 nfs4_fattr_bitmap_maxsz + 1)
275 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
276 encode_stateid_maxsz + 3)
277 #define decode_setacl_maxsz (decode_setattr_maxsz)
278 #define encode_fs_locations_maxsz \
279 (encode_getattr_maxsz)
280 #define decode_fs_locations_maxsz \
281 (0)
282 #define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
283 #define decode_secinfo_maxsz (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
284
285 #if defined(CONFIG_NFS_V4_1)
286 #define NFS4_MAX_MACHINE_NAME_LEN (64)
287 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
288 sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
289
290 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
291 encode_verifier_maxsz + \
292 1 /* co_ownerid.len */ + \
293 /* eia_clientowner */ \
294 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
295 1 /* flags */ + \
296 1 /* spa_how */ + \
297 /* max is SP4_MACH_CRED (for now) */ + \
298 1 + NFS4_OP_MAP_NUM_WORDS + \
299 1 + NFS4_OP_MAP_NUM_WORDS + \
300 1 /* implementation id array of size 1 */ + \
301 1 /* nii_domain */ + \
302 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
303 1 /* nii_name */ + \
304 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
305 3 /* nii_date */)
306 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
307 2 /* eir_clientid */ + \
308 1 /* eir_sequenceid */ + \
309 1 /* eir_flags */ + \
310 1 /* spr_how */ + \
311 /* max is SP4_MACH_CRED (for now) */ + \
312 1 + NFS4_OP_MAP_NUM_WORDS + \
313 1 + NFS4_OP_MAP_NUM_WORDS + \
314 2 /* eir_server_owner.so_minor_id */ + \
315 /* eir_server_owner.so_major_id<> */ \
316 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
317 /* eir_server_scope<> */ \
318 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
319 1 /* eir_server_impl_id array length */ + \
320 1 /* nii_domain */ + \
321 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
322 1 /* nii_name */ + \
323 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
324 3 /* nii_date */)
325 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
326 #define decode_channel_attrs_maxsz (6 + \
327 1 /* ca_rdma_ird.len */ + \
328 1 /* ca_rdma_ird */)
329 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \
330 2 /* csa_clientid */ + \
331 1 /* csa_sequence */ + \
332 1 /* csa_flags */ + \
333 encode_channel_attrs_maxsz + \
334 encode_channel_attrs_maxsz + \
335 1 /* csa_cb_program */ + \
336 1 /* csa_sec_parms.len (1) */ + \
337 1 /* cb_secflavor (AUTH_SYS) */ + \
338 1 /* stamp */ + \
339 1 /* machinename.len */ + \
340 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
341 1 /* uid */ + \
342 1 /* gid */ + \
343 1 /* gids.len (0) */)
344 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \
345 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
346 1 /* csr_sequence */ + \
347 1 /* csr_flags */ + \
348 decode_channel_attrs_maxsz + \
349 decode_channel_attrs_maxsz)
350 #define encode_bind_conn_to_session_maxsz (op_encode_hdr_maxsz + \
351 /* bctsa_sessid */ \
352 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
353 1 /* bctsa_dir */ + \
354 1 /* bctsa_use_conn_in_rdma_mode */)
355 #define decode_bind_conn_to_session_maxsz (op_decode_hdr_maxsz + \
356 /* bctsr_sessid */ \
357 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
358 1 /* bctsr_dir */ + \
359 1 /* bctsr_use_conn_in_rdma_mode */)
360 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
361 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
362 #define encode_destroy_clientid_maxsz (op_encode_hdr_maxsz + 2)
363 #define decode_destroy_clientid_maxsz (op_decode_hdr_maxsz)
364 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \
365 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
366 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \
367 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
368 #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
369 #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
370 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
371 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
372 1 /* layout type */ + \
373 1 /* maxcount */ + \
374 1 /* bitmap size */ + \
375 1 /* notification bitmap length */ + \
376 1 /* notification bitmap, word 0 */)
377 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
378 1 /* layout type */ + \
379 1 /* opaque devaddr4 length */ + \
380 /* devaddr4 payload is read into page */ \
381 1 /* notification bitmap length */ + \
382 1 /* notification bitmap, word 0 */)
383 #define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
384 encode_stateid_maxsz)
385 #define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
386 decode_stateid_maxsz + \
387 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
388 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
389 2 /* offset */ + \
390 2 /* length */ + \
391 1 /* reclaim */ + \
392 encode_stateid_maxsz + \
393 1 /* new offset (true) */ + \
394 2 /* last byte written */ + \
395 1 /* nt_timechanged (false) */ + \
396 1 /* layoutupdate4 layout type */ + \
397 1 /* layoutupdate4 opaqueue len */)
398 /* the actual content of layoutupdate4 should
399 be allocated by drivers and spliced in
400 using xdr_write_pages */
401 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
402 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
403 encode_stateid_maxsz + \
404 1 + \
405 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
406 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
407 1 + decode_stateid_maxsz)
408 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
409 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
410 #define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \
411 XDR_QUADLEN(NFS4_STATEID_SIZE))
412 #define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1)
413 #define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \
414 XDR_QUADLEN(NFS4_STATEID_SIZE))
415 #define decode_free_stateid_maxsz (op_decode_hdr_maxsz)
416 #else /* CONFIG_NFS_V4_1 */
417 #define encode_sequence_maxsz 0
418 #define decode_sequence_maxsz 0
419 #define encode_layoutreturn_maxsz 0
420 #define decode_layoutreturn_maxsz 0
421 #endif /* CONFIG_NFS_V4_1 */
422
423 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
424 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
425 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
426 encode_sequence_maxsz + \
427 encode_putfh_maxsz + \
428 encode_read_maxsz)
429 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
430 decode_sequence_maxsz + \
431 decode_putfh_maxsz + \
432 decode_read_maxsz)
433 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
434 encode_sequence_maxsz + \
435 encode_putfh_maxsz + \
436 encode_readlink_maxsz)
437 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
438 decode_sequence_maxsz + \
439 decode_putfh_maxsz + \
440 decode_readlink_maxsz)
441 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
442 encode_sequence_maxsz + \
443 encode_putfh_maxsz + \
444 encode_readdir_maxsz)
445 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
446 decode_sequence_maxsz + \
447 decode_putfh_maxsz + \
448 decode_readdir_maxsz)
449 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
450 encode_sequence_maxsz + \
451 encode_putfh_maxsz + \
452 encode_write_maxsz + \
453 encode_getattr_maxsz)
454 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
455 decode_sequence_maxsz + \
456 decode_putfh_maxsz + \
457 decode_write_maxsz + \
458 decode_getattr_maxsz)
459 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
460 encode_sequence_maxsz + \
461 encode_putfh_maxsz + \
462 encode_commit_maxsz)
463 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
464 decode_sequence_maxsz + \
465 decode_putfh_maxsz + \
466 decode_commit_maxsz)
467 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
468 encode_sequence_maxsz + \
469 encode_putfh_maxsz + \
470 encode_open_maxsz + \
471 encode_access_maxsz + \
472 encode_getfh_maxsz + \
473 encode_getattr_maxsz)
474 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
475 decode_sequence_maxsz + \
476 decode_putfh_maxsz + \
477 decode_open_maxsz + \
478 decode_access_maxsz + \
479 decode_getfh_maxsz + \
480 decode_getattr_maxsz)
481 #define NFS4_enc_open_confirm_sz \
482 (compound_encode_hdr_maxsz + \
483 encode_putfh_maxsz + \
484 encode_open_confirm_maxsz)
485 #define NFS4_dec_open_confirm_sz \
486 (compound_decode_hdr_maxsz + \
487 decode_putfh_maxsz + \
488 decode_open_confirm_maxsz)
489 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
490 encode_sequence_maxsz + \
491 encode_putfh_maxsz + \
492 encode_open_maxsz + \
493 encode_access_maxsz + \
494 encode_getattr_maxsz)
495 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
496 decode_sequence_maxsz + \
497 decode_putfh_maxsz + \
498 decode_open_maxsz + \
499 decode_access_maxsz + \
500 decode_getattr_maxsz)
501 #define NFS4_enc_open_downgrade_sz \
502 (compound_encode_hdr_maxsz + \
503 encode_sequence_maxsz + \
504 encode_putfh_maxsz + \
505 encode_layoutreturn_maxsz + \
506 encode_open_downgrade_maxsz)
507 #define NFS4_dec_open_downgrade_sz \
508 (compound_decode_hdr_maxsz + \
509 decode_sequence_maxsz + \
510 decode_putfh_maxsz + \
511 decode_layoutreturn_maxsz + \
512 decode_open_downgrade_maxsz)
513 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
514 encode_sequence_maxsz + \
515 encode_putfh_maxsz + \
516 encode_layoutreturn_maxsz + \
517 encode_close_maxsz + \
518 encode_getattr_maxsz)
519 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
520 decode_sequence_maxsz + \
521 decode_putfh_maxsz + \
522 decode_layoutreturn_maxsz + \
523 decode_close_maxsz + \
524 decode_getattr_maxsz)
525 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
526 encode_sequence_maxsz + \
527 encode_putfh_maxsz + \
528 encode_setattr_maxsz + \
529 encode_getattr_maxsz)
530 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
531 decode_sequence_maxsz + \
532 decode_putfh_maxsz + \
533 decode_setattr_maxsz + \
534 decode_getattr_maxsz)
535 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
536 encode_sequence_maxsz + \
537 encode_putfh_maxsz + \
538 encode_fsinfo_maxsz)
539 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
540 decode_sequence_maxsz + \
541 decode_putfh_maxsz + \
542 decode_fsinfo_maxsz)
543 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
544 encode_renew_maxsz)
545 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
546 decode_renew_maxsz)
547 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
548 encode_setclientid_maxsz)
549 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
550 decode_setclientid_maxsz)
551 #define NFS4_enc_setclientid_confirm_sz \
552 (compound_encode_hdr_maxsz + \
553 encode_setclientid_confirm_maxsz)
554 #define NFS4_dec_setclientid_confirm_sz \
555 (compound_decode_hdr_maxsz + \
556 decode_setclientid_confirm_maxsz)
557 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
558 encode_sequence_maxsz + \
559 encode_putfh_maxsz + \
560 encode_lock_maxsz)
561 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
562 decode_sequence_maxsz + \
563 decode_putfh_maxsz + \
564 decode_lock_maxsz)
565 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
566 encode_sequence_maxsz + \
567 encode_putfh_maxsz + \
568 encode_lockt_maxsz)
569 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
570 decode_sequence_maxsz + \
571 decode_putfh_maxsz + \
572 decode_lockt_maxsz)
573 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
574 encode_sequence_maxsz + \
575 encode_putfh_maxsz + \
576 encode_locku_maxsz)
577 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
578 decode_sequence_maxsz + \
579 decode_putfh_maxsz + \
580 decode_locku_maxsz)
581 #define NFS4_enc_release_lockowner_sz \
582 (compound_encode_hdr_maxsz + \
583 encode_lockowner_maxsz)
584 #define NFS4_dec_release_lockowner_sz \
585 (compound_decode_hdr_maxsz + \
586 decode_lockowner_maxsz)
587 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
588 encode_sequence_maxsz + \
589 encode_putfh_maxsz + \
590 encode_access_maxsz + \
591 encode_getattr_maxsz)
592 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
593 decode_sequence_maxsz + \
594 decode_putfh_maxsz + \
595 decode_access_maxsz + \
596 decode_getattr_maxsz)
597 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
598 encode_sequence_maxsz + \
599 encode_putfh_maxsz + \
600 encode_getattr_maxsz + \
601 encode_renew_maxsz)
602 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
603 decode_sequence_maxsz + \
604 decode_putfh_maxsz + \
605 decode_getattr_maxsz + \
606 decode_renew_maxsz)
607 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
608 encode_sequence_maxsz + \
609 encode_putfh_maxsz + \
610 encode_lookup_maxsz + \
611 encode_getattr_maxsz + \
612 encode_getfh_maxsz)
613 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
614 decode_sequence_maxsz + \
615 decode_putfh_maxsz + \
616 decode_lookup_maxsz + \
617 decode_getattr_maxsz + \
618 decode_getfh_maxsz)
619 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
620 encode_sequence_maxsz + \
621 encode_putrootfh_maxsz + \
622 encode_getattr_maxsz + \
623 encode_getfh_maxsz)
624 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
625 decode_sequence_maxsz + \
626 decode_putrootfh_maxsz + \
627 decode_getattr_maxsz + \
628 decode_getfh_maxsz)
629 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
630 encode_sequence_maxsz + \
631 encode_putfh_maxsz + \
632 encode_remove_maxsz)
633 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
634 decode_sequence_maxsz + \
635 decode_putfh_maxsz + \
636 decode_remove_maxsz)
637 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
638 encode_sequence_maxsz + \
639 encode_putfh_maxsz + \
640 encode_savefh_maxsz + \
641 encode_putfh_maxsz + \
642 encode_rename_maxsz)
643 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
644 decode_sequence_maxsz + \
645 decode_putfh_maxsz + \
646 decode_savefh_maxsz + \
647 decode_putfh_maxsz + \
648 decode_rename_maxsz)
649 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
650 encode_sequence_maxsz + \
651 encode_putfh_maxsz + \
652 encode_savefh_maxsz + \
653 encode_putfh_maxsz + \
654 encode_link_maxsz + \
655 encode_restorefh_maxsz + \
656 encode_getattr_maxsz)
657 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
658 decode_sequence_maxsz + \
659 decode_putfh_maxsz + \
660 decode_savefh_maxsz + \
661 decode_putfh_maxsz + \
662 decode_link_maxsz + \
663 decode_restorefh_maxsz + \
664 decode_getattr_maxsz)
665 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
666 encode_sequence_maxsz + \
667 encode_putfh_maxsz + \
668 encode_symlink_maxsz + \
669 encode_getattr_maxsz + \
670 encode_getfh_maxsz)
671 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
672 decode_sequence_maxsz + \
673 decode_putfh_maxsz + \
674 decode_symlink_maxsz + \
675 decode_getattr_maxsz + \
676 decode_getfh_maxsz)
677 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
678 encode_sequence_maxsz + \
679 encode_putfh_maxsz + \
680 encode_create_maxsz + \
681 encode_getfh_maxsz + \
682 encode_getattr_maxsz)
683 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
684 decode_sequence_maxsz + \
685 decode_putfh_maxsz + \
686 decode_create_maxsz + \
687 decode_getfh_maxsz + \
688 decode_getattr_maxsz)
689 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
690 encode_sequence_maxsz + \
691 encode_putfh_maxsz + \
692 encode_getattr_maxsz)
693 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
694 decode_sequence_maxsz + \
695 decode_putfh_maxsz + \
696 decode_getattr_maxsz)
697 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
698 encode_sequence_maxsz + \
699 encode_putfh_maxsz + \
700 encode_statfs_maxsz)
701 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
702 decode_sequence_maxsz + \
703 decode_putfh_maxsz + \
704 decode_statfs_maxsz)
705 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
706 encode_sequence_maxsz + \
707 encode_putfh_maxsz + \
708 encode_getattr_maxsz)
709 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
710 decode_sequence_maxsz + \
711 decode_putfh_maxsz + \
712 decode_getattr_maxsz)
713 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
714 encode_sequence_maxsz + \
715 encode_putfh_maxsz + \
716 encode_layoutreturn_maxsz + \
717 encode_delegreturn_maxsz + \
718 encode_getattr_maxsz)
719 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
720 decode_sequence_maxsz + \
721 decode_putfh_maxsz + \
722 decode_layoutreturn_maxsz + \
723 decode_delegreturn_maxsz + \
724 decode_getattr_maxsz)
725 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
726 encode_sequence_maxsz + \
727 encode_putfh_maxsz + \
728 encode_getacl_maxsz)
729 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
730 decode_sequence_maxsz + \
731 decode_putfh_maxsz + \
732 decode_getacl_maxsz)
733 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
734 encode_sequence_maxsz + \
735 encode_putfh_maxsz + \
736 encode_setacl_maxsz)
737 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
738 decode_sequence_maxsz + \
739 decode_putfh_maxsz + \
740 decode_setacl_maxsz)
741 #define NFS4_enc_fs_locations_sz \
742 (compound_encode_hdr_maxsz + \
743 encode_sequence_maxsz + \
744 encode_putfh_maxsz + \
745 encode_lookup_maxsz + \
746 encode_fs_locations_maxsz + \
747 encode_renew_maxsz)
748 #define NFS4_dec_fs_locations_sz \
749 (compound_decode_hdr_maxsz + \
750 decode_sequence_maxsz + \
751 decode_putfh_maxsz + \
752 decode_lookup_maxsz + \
753 decode_fs_locations_maxsz + \
754 decode_renew_maxsz)
755 #define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
756 encode_sequence_maxsz + \
757 encode_putfh_maxsz + \
758 encode_secinfo_maxsz)
759 #define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
760 decode_sequence_maxsz + \
761 decode_putfh_maxsz + \
762 decode_secinfo_maxsz)
763 #define NFS4_enc_fsid_present_sz \
764 (compound_encode_hdr_maxsz + \
765 encode_sequence_maxsz + \
766 encode_putfh_maxsz + \
767 encode_getfh_maxsz + \
768 encode_renew_maxsz)
769 #define NFS4_dec_fsid_present_sz \
770 (compound_decode_hdr_maxsz + \
771 decode_sequence_maxsz + \
772 decode_putfh_maxsz + \
773 decode_getfh_maxsz + \
774 decode_renew_maxsz)
775 #if defined(CONFIG_NFS_V4_1)
776 #define NFS4_enc_bind_conn_to_session_sz \
777 (compound_encode_hdr_maxsz + \
778 encode_bind_conn_to_session_maxsz)
779 #define NFS4_dec_bind_conn_to_session_sz \
780 (compound_decode_hdr_maxsz + \
781 decode_bind_conn_to_session_maxsz)
782 #define NFS4_enc_exchange_id_sz \
783 (compound_encode_hdr_maxsz + \
784 encode_exchange_id_maxsz)
785 #define NFS4_dec_exchange_id_sz \
786 (compound_decode_hdr_maxsz + \
787 decode_exchange_id_maxsz)
788 #define NFS4_enc_create_session_sz \
789 (compound_encode_hdr_maxsz + \
790 encode_create_session_maxsz)
791 #define NFS4_dec_create_session_sz \
792 (compound_decode_hdr_maxsz + \
793 decode_create_session_maxsz)
794 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
795 encode_destroy_session_maxsz)
796 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
797 decode_destroy_session_maxsz)
798 #define NFS4_enc_destroy_clientid_sz (compound_encode_hdr_maxsz + \
799 encode_destroy_clientid_maxsz)
800 #define NFS4_dec_destroy_clientid_sz (compound_decode_hdr_maxsz + \
801 decode_destroy_clientid_maxsz)
802 #define NFS4_enc_sequence_sz \
803 (compound_decode_hdr_maxsz + \
804 encode_sequence_maxsz)
805 #define NFS4_dec_sequence_sz \
806 (compound_decode_hdr_maxsz + \
807 decode_sequence_maxsz)
808 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
809 encode_sequence_maxsz + \
810 encode_putrootfh_maxsz + \
811 encode_fsinfo_maxsz)
812 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
813 decode_sequence_maxsz + \
814 decode_putrootfh_maxsz + \
815 decode_fsinfo_maxsz)
816 #define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
817 encode_sequence_maxsz + \
818 encode_reclaim_complete_maxsz)
819 #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
820 decode_sequence_maxsz + \
821 decode_reclaim_complete_maxsz)
822 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
823 encode_sequence_maxsz +\
824 encode_getdeviceinfo_maxsz)
825 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
826 decode_sequence_maxsz + \
827 decode_getdeviceinfo_maxsz)
828 #define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
829 encode_sequence_maxsz + \
830 encode_putfh_maxsz + \
831 encode_layoutget_maxsz)
832 #define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
833 decode_sequence_maxsz + \
834 decode_putfh_maxsz + \
835 decode_layoutget_maxsz)
836 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
837 encode_sequence_maxsz +\
838 encode_putfh_maxsz + \
839 encode_layoutcommit_maxsz + \
840 encode_getattr_maxsz)
841 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
842 decode_sequence_maxsz + \
843 decode_putfh_maxsz + \
844 decode_layoutcommit_maxsz + \
845 decode_getattr_maxsz)
846 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
847 encode_sequence_maxsz + \
848 encode_putfh_maxsz + \
849 encode_layoutreturn_maxsz)
850 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
851 decode_sequence_maxsz + \
852 decode_putfh_maxsz + \
853 decode_layoutreturn_maxsz)
854 #define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
855 encode_sequence_maxsz + \
856 encode_putrootfh_maxsz +\
857 encode_secinfo_no_name_maxsz)
858 #define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
859 decode_sequence_maxsz + \
860 decode_putrootfh_maxsz + \
861 decode_secinfo_no_name_maxsz)
862 #define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
863 encode_sequence_maxsz + \
864 encode_test_stateid_maxsz)
865 #define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
866 decode_sequence_maxsz + \
867 decode_test_stateid_maxsz)
868 #define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \
869 encode_sequence_maxsz + \
870 encode_free_stateid_maxsz)
871 #define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
872 decode_sequence_maxsz + \
873 decode_free_stateid_maxsz)
874
875 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
876 compound_encode_hdr_maxsz +
877 encode_sequence_maxsz +
878 encode_putfh_maxsz +
879 encode_getattr_maxsz) *
880 XDR_UNIT);
881
882 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
883 compound_decode_hdr_maxsz +
884 decode_sequence_maxsz +
885 decode_putfh_maxsz) *
886 XDR_UNIT);
887
888 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
889 compound_decode_hdr_maxsz +
890 decode_sequence_maxsz) *
891 XDR_UNIT);
892 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
893 #endif /* CONFIG_NFS_V4_1 */
894
895 static const umode_t nfs_type2fmt[] = {
896 [NF4BAD] = 0,
897 [NF4REG] = S_IFREG,
898 [NF4DIR] = S_IFDIR,
899 [NF4BLK] = S_IFBLK,
900 [NF4CHR] = S_IFCHR,
901 [NF4LNK] = S_IFLNK,
902 [NF4SOCK] = S_IFSOCK,
903 [NF4FIFO] = S_IFIFO,
904 [NF4ATTRDIR] = 0,
905 [NF4NAMEDATTR] = 0,
906 };
907
908 struct compound_hdr {
909 int32_t status;
910 uint32_t nops;
911 __be32 * nops_p;
912 uint32_t taglen;
913 char * tag;
914 uint32_t replen; /* expected reply words */
915 u32 minorversion;
916 };
917
918 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
919 {
920 __be32 *p = xdr_reserve_space(xdr, nbytes);
921 BUG_ON(!p);
922 return p;
923 }
924
925 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
926 {
927 __be32 *p;
928
929 p = xdr_reserve_space(xdr, len);
930 xdr_encode_opaque_fixed(p, buf, len);
931 }
932
933 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
934 {
935 __be32 *p;
936
937 p = reserve_space(xdr, 4 + len);
938 xdr_encode_opaque(p, str, len);
939 }
940
941 static void encode_uint32(struct xdr_stream *xdr, u32 n)
942 {
943 __be32 *p;
944
945 p = reserve_space(xdr, 4);
946 *p = cpu_to_be32(n);
947 }
948
949 static void encode_uint64(struct xdr_stream *xdr, u64 n)
950 {
951 __be32 *p;
952
953 p = reserve_space(xdr, 8);
954 xdr_encode_hyper(p, n);
955 }
956
957 static void encode_nfs4_seqid(struct xdr_stream *xdr,
958 const struct nfs_seqid *seqid)
959 {
960 if (seqid != NULL)
961 encode_uint32(xdr, seqid->sequence->counter);
962 else
963 encode_uint32(xdr, 0);
964 }
965
966 static void encode_compound_hdr(struct xdr_stream *xdr,
967 struct rpc_rqst *req,
968 struct compound_hdr *hdr)
969 {
970 __be32 *p;
971 struct rpc_auth *auth = req->rq_cred->cr_auth;
972
973 /* initialize running count of expected bytes in reply.
974 * NOTE: the replied tag SHOULD be the same is the one sent,
975 * but this is not required as a MUST for the server to do so. */
976 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
977
978 WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
979 encode_string(xdr, hdr->taglen, hdr->tag);
980 p = reserve_space(xdr, 8);
981 *p++ = cpu_to_be32(hdr->minorversion);
982 hdr->nops_p = p;
983 *p = cpu_to_be32(hdr->nops);
984 }
985
986 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
987 uint32_t replen,
988 struct compound_hdr *hdr)
989 {
990 encode_uint32(xdr, op);
991 hdr->nops++;
992 hdr->replen += replen;
993 }
994
995 static void encode_nops(struct compound_hdr *hdr)
996 {
997 WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
998 *hdr->nops_p = htonl(hdr->nops);
999 }
1000
1001 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1002 {
1003 encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1004 }
1005
1006 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1007 {
1008 encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1009 }
1010
1011 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1012 const struct nfs4_label *label,
1013 const struct nfs_server *server,
1014 bool excl_check, const umode_t *umask)
1015 {
1016 char owner_name[IDMAP_NAMESZ];
1017 char owner_group[IDMAP_NAMESZ];
1018 int owner_namelen = 0;
1019 int owner_grouplen = 0;
1020 __be32 *p;
1021 unsigned i;
1022 uint32_t len = 0;
1023 uint32_t bmval_len;
1024 uint32_t bmval[3] = { 0 };
1025
1026 /*
1027 * We reserve enough space to write the entire attribute buffer at once.
1028 */
1029 if (iap->ia_valid & ATTR_SIZE) {
1030 bmval[0] |= FATTR4_WORD0_SIZE;
1031 len += 8;
1032 }
1033 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
1034 umask = NULL;
1035 if (iap->ia_valid & ATTR_MODE) {
1036 if (umask) {
1037 bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1038 len += 8;
1039 } else {
1040 bmval[1] |= FATTR4_WORD1_MODE;
1041 len += 4;
1042 }
1043 }
1044 if (iap->ia_valid & ATTR_UID) {
1045 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1046 if (owner_namelen < 0) {
1047 dprintk("nfs: couldn't resolve uid %d to string\n",
1048 from_kuid(&init_user_ns, iap->ia_uid));
1049 /* XXX */
1050 strcpy(owner_name, "nobody");
1051 owner_namelen = sizeof("nobody") - 1;
1052 /* goto out; */
1053 }
1054 bmval[1] |= FATTR4_WORD1_OWNER;
1055 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1056 }
1057 if (iap->ia_valid & ATTR_GID) {
1058 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1059 if (owner_grouplen < 0) {
1060 dprintk("nfs: couldn't resolve gid %d to string\n",
1061 from_kgid(&init_user_ns, iap->ia_gid));
1062 strcpy(owner_group, "nobody");
1063 owner_grouplen = sizeof("nobody") - 1;
1064 /* goto out; */
1065 }
1066 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1067 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1068 }
1069 if (iap->ia_valid & ATTR_ATIME_SET) {
1070 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1071 len += 16;
1072 } else if (iap->ia_valid & ATTR_ATIME) {
1073 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1074 len += 4;
1075 }
1076 if (iap->ia_valid & ATTR_MTIME_SET) {
1077 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1078 len += 16;
1079 } else if (iap->ia_valid & ATTR_MTIME) {
1080 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1081 len += 4;
1082 }
1083
1084 if (excl_check) {
1085 const u32 *excl_bmval = server->exclcreat_bitmask;
1086 bmval[0] &= excl_bmval[0];
1087 bmval[1] &= excl_bmval[1];
1088 bmval[2] &= excl_bmval[2];
1089
1090 if (!(excl_bmval[2] & FATTR4_WORD2_SECURITY_LABEL))
1091 label = NULL;
1092 }
1093
1094 if (label) {
1095 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1096 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1097 }
1098
1099 if (bmval[2] != 0)
1100 bmval_len = 3;
1101 else if (bmval[1] != 0)
1102 bmval_len = 2;
1103 else
1104 bmval_len = 1;
1105
1106 p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1107
1108 *p++ = cpu_to_be32(bmval_len);
1109 for (i = 0; i < bmval_len; i++)
1110 *p++ = cpu_to_be32(bmval[i]);
1111 *p++ = cpu_to_be32(len);
1112
1113 if (bmval[0] & FATTR4_WORD0_SIZE)
1114 p = xdr_encode_hyper(p, iap->ia_size);
1115 if (bmval[1] & FATTR4_WORD1_MODE)
1116 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1117 if (bmval[1] & FATTR4_WORD1_OWNER)
1118 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1119 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1120 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1121 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1122 if (iap->ia_valid & ATTR_ATIME_SET) {
1123 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1124 p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1125 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1126 } else
1127 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1128 }
1129 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1130 if (iap->ia_valid & ATTR_MTIME_SET) {
1131 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1132 p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1133 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1134 } else
1135 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1136 }
1137 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1138 *p++ = cpu_to_be32(label->lfs);
1139 *p++ = cpu_to_be32(label->pi);
1140 *p++ = cpu_to_be32(label->len);
1141 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1142 }
1143 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1144 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1145 *p++ = cpu_to_be32(*umask);
1146 }
1147
1148 /* out: */
1149 }
1150
1151 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1152 {
1153 encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1154 encode_uint32(xdr, access);
1155 }
1156
1157 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1158 {
1159 encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1160 encode_nfs4_seqid(xdr, arg->seqid);
1161 encode_nfs4_stateid(xdr, &arg->stateid);
1162 }
1163
1164 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1165 {
1166 __be32 *p;
1167
1168 encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1169 p = reserve_space(xdr, 12);
1170 p = xdr_encode_hyper(p, args->offset);
1171 *p = cpu_to_be32(args->count);
1172 }
1173
1174 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1175 {
1176 __be32 *p;
1177
1178 encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1179 encode_uint32(xdr, create->ftype);
1180
1181 switch (create->ftype) {
1182 case NF4LNK:
1183 p = reserve_space(xdr, 4);
1184 *p = cpu_to_be32(create->u.symlink.len);
1185 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1186 create->u.symlink.len);
1187 xdr->buf->flags |= XDRBUF_WRITE;
1188 break;
1189
1190 case NF4BLK: case NF4CHR:
1191 p = reserve_space(xdr, 8);
1192 *p++ = cpu_to_be32(create->u.device.specdata1);
1193 *p = cpu_to_be32(create->u.device.specdata2);
1194 break;
1195
1196 default:
1197 break;
1198 }
1199
1200 encode_string(xdr, create->name->len, create->name->name);
1201 encode_attrs(xdr, create->attrs, create->label, create->server, false,
1202 &create->umask);
1203 }
1204
1205 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1206 {
1207 __be32 *p;
1208
1209 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1210 p = reserve_space(xdr, 8);
1211 *p++ = cpu_to_be32(1);
1212 *p = cpu_to_be32(bitmap);
1213 }
1214
1215 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1216 {
1217 __be32 *p;
1218
1219 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1220 p = reserve_space(xdr, 12);
1221 *p++ = cpu_to_be32(2);
1222 *p++ = cpu_to_be32(bm0);
1223 *p = cpu_to_be32(bm1);
1224 }
1225
1226 static void
1227 encode_getattr_three(struct xdr_stream *xdr,
1228 uint32_t bm0, uint32_t bm1, uint32_t bm2,
1229 struct compound_hdr *hdr)
1230 {
1231 __be32 *p;
1232
1233 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1234 if (bm2) {
1235 p = reserve_space(xdr, 16);
1236 *p++ = cpu_to_be32(3);
1237 *p++ = cpu_to_be32(bm0);
1238 *p++ = cpu_to_be32(bm1);
1239 *p = cpu_to_be32(bm2);
1240 } else if (bm1) {
1241 p = reserve_space(xdr, 12);
1242 *p++ = cpu_to_be32(2);
1243 *p++ = cpu_to_be32(bm0);
1244 *p = cpu_to_be32(bm1);
1245 } else {
1246 p = reserve_space(xdr, 8);
1247 *p++ = cpu_to_be32(1);
1248 *p = cpu_to_be32(bm0);
1249 }
1250 }
1251
1252 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1253 {
1254 encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1255 bitmask[1] & nfs4_fattr_bitmap[1],
1256 bitmask[2] & nfs4_fattr_bitmap[2],
1257 hdr);
1258 }
1259
1260 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1261 const u32 *open_bitmap,
1262 struct compound_hdr *hdr)
1263 {
1264 encode_getattr_three(xdr,
1265 bitmask[0] & open_bitmap[0],
1266 bitmask[1] & open_bitmap[1],
1267 bitmask[2] & open_bitmap[2],
1268 hdr);
1269 }
1270
1271 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1272 {
1273 encode_getattr_three(xdr,
1274 bitmask[0] & nfs4_fsinfo_bitmap[0],
1275 bitmask[1] & nfs4_fsinfo_bitmap[1],
1276 bitmask[2] & nfs4_fsinfo_bitmap[2],
1277 hdr);
1278 }
1279
1280 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1281 {
1282 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1283 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1284 }
1285
1286 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1287 {
1288 encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1289 }
1290
1291 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1292 {
1293 encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1294 encode_string(xdr, name->len, name->name);
1295 }
1296
1297 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1298 {
1299 if (fl->fl_type == F_RDLCK)
1300 return block ? NFS4_READW_LT : NFS4_READ_LT;
1301 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1302 }
1303
1304 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1305 {
1306 if (fl->fl_end == OFFSET_MAX)
1307 return ~(uint64_t)0;
1308 return fl->fl_end - fl->fl_start + 1;
1309 }
1310
1311 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1312 {
1313 __be32 *p;
1314
1315 p = reserve_space(xdr, 32);
1316 p = xdr_encode_hyper(p, lowner->clientid);
1317 *p++ = cpu_to_be32(20);
1318 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1319 *p++ = cpu_to_be32(lowner->s_dev);
1320 xdr_encode_hyper(p, lowner->id);
1321 }
1322
1323 /*
1324 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1325 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1326 */
1327 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1328 {
1329 __be32 *p;
1330
1331 encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1332 p = reserve_space(xdr, 28);
1333 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1334 *p++ = cpu_to_be32(args->reclaim);
1335 p = xdr_encode_hyper(p, args->fl->fl_start);
1336 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1337 *p = cpu_to_be32(args->new_lock_owner);
1338 if (args->new_lock_owner){
1339 encode_nfs4_seqid(xdr, args->open_seqid);
1340 encode_nfs4_stateid(xdr, &args->open_stateid);
1341 encode_nfs4_seqid(xdr, args->lock_seqid);
1342 encode_lockowner(xdr, &args->lock_owner);
1343 }
1344 else {
1345 encode_nfs4_stateid(xdr, &args->lock_stateid);
1346 encode_nfs4_seqid(xdr, args->lock_seqid);
1347 }
1348 }
1349
1350 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1351 {
1352 __be32 *p;
1353
1354 encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1355 p = reserve_space(xdr, 20);
1356 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1357 p = xdr_encode_hyper(p, args->fl->fl_start);
1358 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1359 encode_lockowner(xdr, &args->lock_owner);
1360 }
1361
1362 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1363 {
1364 __be32 *p;
1365
1366 encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1367 encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1368 encode_nfs4_seqid(xdr, args->seqid);
1369 encode_nfs4_stateid(xdr, &args->stateid);
1370 p = reserve_space(xdr, 16);
1371 p = xdr_encode_hyper(p, args->fl->fl_start);
1372 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1373 }
1374
1375 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1376 {
1377 encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1378 encode_lockowner(xdr, lowner);
1379 }
1380
1381 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1382 {
1383 encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1384 encode_string(xdr, name->len, name->name);
1385 }
1386
1387 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1388 {
1389 __be32 *p;
1390
1391 p = reserve_space(xdr, 8);
1392 *p++ = cpu_to_be32(share_access);
1393 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1394 }
1395
1396 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1397 {
1398 __be32 *p;
1399 /*
1400 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1401 * owner 4 = 32
1402 */
1403 encode_nfs4_seqid(xdr, arg->seqid);
1404 encode_share_access(xdr, arg->share_access);
1405 p = reserve_space(xdr, 36);
1406 p = xdr_encode_hyper(p, arg->clientid);
1407 *p++ = cpu_to_be32(24);
1408 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1409 *p++ = cpu_to_be32(arg->server->s_dev);
1410 *p++ = cpu_to_be32(arg->id.uniquifier);
1411 xdr_encode_hyper(p, arg->id.create_time);
1412 }
1413
1414 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1415 {
1416 __be32 *p;
1417
1418 p = reserve_space(xdr, 4);
1419 switch(arg->createmode) {
1420 case NFS4_CREATE_UNCHECKED:
1421 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1422 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, false,
1423 &arg->umask);
1424 break;
1425 case NFS4_CREATE_GUARDED:
1426 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1427 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, false,
1428 &arg->umask);
1429 break;
1430 case NFS4_CREATE_EXCLUSIVE:
1431 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1432 encode_nfs4_verifier(xdr, &arg->u.verifier);
1433 break;
1434 case NFS4_CREATE_EXCLUSIVE4_1:
1435 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1436 encode_nfs4_verifier(xdr, &arg->u.verifier);
1437 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, true,
1438 &arg->umask);
1439 }
1440 }
1441
1442 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1443 {
1444 __be32 *p;
1445
1446 p = reserve_space(xdr, 4);
1447 switch (arg->open_flags & O_CREAT) {
1448 case 0:
1449 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1450 break;
1451 default:
1452 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1453 encode_createmode(xdr, arg);
1454 }
1455 }
1456
1457 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1458 {
1459 __be32 *p;
1460
1461 p = reserve_space(xdr, 4);
1462 switch (delegation_type) {
1463 case 0:
1464 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1465 break;
1466 case FMODE_READ:
1467 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1468 break;
1469 case FMODE_WRITE|FMODE_READ:
1470 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1471 break;
1472 default:
1473 BUG();
1474 }
1475 }
1476
1477 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1478 {
1479 __be32 *p;
1480
1481 p = reserve_space(xdr, 4);
1482 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1483 encode_string(xdr, name->len, name->name);
1484 }
1485
1486 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1487 {
1488 __be32 *p;
1489
1490 p = reserve_space(xdr, 4);
1491 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1492 encode_delegation_type(xdr, type);
1493 }
1494
1495 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1496 {
1497 __be32 *p;
1498
1499 p = reserve_space(xdr, 4);
1500 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1501 encode_nfs4_stateid(xdr, stateid);
1502 encode_string(xdr, name->len, name->name);
1503 }
1504
1505 static inline void encode_claim_fh(struct xdr_stream *xdr)
1506 {
1507 __be32 *p;
1508
1509 p = reserve_space(xdr, 4);
1510 *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1511 }
1512
1513 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1514 {
1515 __be32 *p;
1516
1517 p = reserve_space(xdr, 4);
1518 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1519 encode_nfs4_stateid(xdr, stateid);
1520 }
1521
1522 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1523 {
1524 encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1525 encode_openhdr(xdr, arg);
1526 encode_opentype(xdr, arg);
1527 switch (arg->claim) {
1528 case NFS4_OPEN_CLAIM_NULL:
1529 encode_claim_null(xdr, arg->name);
1530 break;
1531 case NFS4_OPEN_CLAIM_PREVIOUS:
1532 encode_claim_previous(xdr, arg->u.delegation_type);
1533 break;
1534 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1535 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1536 break;
1537 case NFS4_OPEN_CLAIM_FH:
1538 encode_claim_fh(xdr);
1539 break;
1540 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1541 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1542 break;
1543 default:
1544 BUG();
1545 }
1546 }
1547
1548 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1549 {
1550 encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1551 encode_nfs4_stateid(xdr, arg->stateid);
1552 encode_nfs4_seqid(xdr, arg->seqid);
1553 }
1554
1555 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1556 {
1557 encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1558 encode_nfs4_stateid(xdr, &arg->stateid);
1559 encode_nfs4_seqid(xdr, arg->seqid);
1560 encode_share_access(xdr, arg->share_access);
1561 }
1562
1563 static void
1564 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1565 {
1566 encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1567 encode_string(xdr, fh->size, fh->data);
1568 }
1569
1570 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1571 {
1572 encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1573 }
1574
1575 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1576 struct compound_hdr *hdr)
1577 {
1578 __be32 *p;
1579
1580 encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1581 encode_nfs4_stateid(xdr, &args->stateid);
1582
1583 p = reserve_space(xdr, 12);
1584 p = xdr_encode_hyper(p, args->offset);
1585 *p = cpu_to_be32(args->count);
1586 }
1587
1588 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1589 {
1590 uint32_t attrs[3] = {
1591 FATTR4_WORD0_RDATTR_ERROR,
1592 FATTR4_WORD1_MOUNTED_ON_FILEID,
1593 };
1594 uint32_t dircount = readdir->count >> 1;
1595 __be32 *p, verf[2];
1596 uint32_t attrlen = 0;
1597 unsigned int i;
1598
1599 if (readdir->plus) {
1600 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1601 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1602 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1603 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1604 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1605 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1606 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1607 dircount >>= 1;
1608 }
1609 /* Use mounted_on_fileid only if the server supports it */
1610 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1611 attrs[0] |= FATTR4_WORD0_FILEID;
1612 for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1613 attrs[i] &= readdir->bitmask[i];
1614 if (attrs[i] != 0)
1615 attrlen = i+1;
1616 }
1617
1618 encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1619 encode_uint64(xdr, readdir->cookie);
1620 encode_nfs4_verifier(xdr, &readdir->verifier);
1621 p = reserve_space(xdr, 12 + (attrlen << 2));
1622 *p++ = cpu_to_be32(dircount);
1623 *p++ = cpu_to_be32(readdir->count);
1624 *p++ = cpu_to_be32(attrlen);
1625 for (i = 0; i < attrlen; i++)
1626 *p++ = cpu_to_be32(attrs[i]);
1627 memcpy(verf, readdir->verifier.data, sizeof(verf));
1628
1629 dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1630 __func__,
1631 (unsigned long long)readdir->cookie,
1632 verf[0], verf[1],
1633 attrs[0] & readdir->bitmask[0],
1634 attrs[1] & readdir->bitmask[1],
1635 attrs[2] & readdir->bitmask[2]);
1636 }
1637
1638 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1639 {
1640 encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1641 }
1642
1643 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1644 {
1645 encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1646 encode_string(xdr, name->len, name->name);
1647 }
1648
1649 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1650 {
1651 encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1652 encode_string(xdr, oldname->len, oldname->name);
1653 encode_string(xdr, newname->len, newname->name);
1654 }
1655
1656 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1657 struct compound_hdr *hdr)
1658 {
1659 encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1660 encode_uint64(xdr, clid);
1661 }
1662
1663 static void
1664 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1665 {
1666 encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1667 }
1668
1669 static void
1670 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1671 {
1672 __be32 *p;
1673
1674 encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1675 encode_nfs4_stateid(xdr, &zero_stateid);
1676 p = reserve_space(xdr, 2*4);
1677 *p++ = cpu_to_be32(1);
1678 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1679 p = reserve_space(xdr, 4);
1680 *p = cpu_to_be32(arg->acl_len);
1681 xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1682 }
1683
1684 static void
1685 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1686 {
1687 encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1688 }
1689
1690 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1691 {
1692 encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1693 encode_nfs4_stateid(xdr, &arg->stateid);
1694 encode_attrs(xdr, arg->iap, arg->label, server, false, NULL);
1695 }
1696
1697 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1698 {
1699 __be32 *p;
1700
1701 encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1702 encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1703
1704 encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1705 setclientid->sc_clnt->cl_owner_id);
1706 p = reserve_space(xdr, 4);
1707 *p = cpu_to_be32(setclientid->sc_prog);
1708 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1709 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1710 p = reserve_space(xdr, 4);
1711 *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1712 }
1713
1714 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1715 {
1716 encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1717 decode_setclientid_confirm_maxsz, hdr);
1718 encode_uint64(xdr, arg->clientid);
1719 encode_nfs4_verifier(xdr, &arg->confirm);
1720 }
1721
1722 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1723 struct compound_hdr *hdr)
1724 {
1725 __be32 *p;
1726
1727 encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1728 encode_nfs4_stateid(xdr, &args->stateid);
1729
1730 p = reserve_space(xdr, 16);
1731 p = xdr_encode_hyper(p, args->offset);
1732 *p++ = cpu_to_be32(args->stable);
1733 *p = cpu_to_be32(args->count);
1734
1735 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1736 }
1737
1738 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1739 {
1740 encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1741 encode_nfs4_stateid(xdr, stateid);
1742 }
1743
1744 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1745 {
1746 encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1747 encode_string(xdr, name->len, name->name);
1748 }
1749
1750 #if defined(CONFIG_NFS_V4_1)
1751 /* NFSv4.1 operations */
1752 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1753 struct nfs41_bind_conn_to_session_args *args,
1754 struct compound_hdr *hdr)
1755 {
1756 __be32 *p;
1757
1758 encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1759 decode_bind_conn_to_session_maxsz, hdr);
1760 encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1761 p = xdr_reserve_space(xdr, 8);
1762 *p++ = cpu_to_be32(args->dir);
1763 *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1764 }
1765
1766 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1767 {
1768 unsigned int i;
1769 encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1770 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1771 encode_uint32(xdr, op_map->u.words[i]);
1772 }
1773
1774 static void encode_exchange_id(struct xdr_stream *xdr,
1775 struct nfs41_exchange_id_args *args,
1776 struct compound_hdr *hdr)
1777 {
1778 __be32 *p;
1779 char impl_name[IMPL_NAME_LIMIT];
1780 int len = 0;
1781
1782 encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1783 encode_nfs4_verifier(xdr, args->verifier);
1784
1785 encode_string(xdr, strlen(args->client->cl_owner_id),
1786 args->client->cl_owner_id);
1787
1788 encode_uint32(xdr, args->flags);
1789 encode_uint32(xdr, args->state_protect.how);
1790
1791 switch (args->state_protect.how) {
1792 case SP4_NONE:
1793 break;
1794 case SP4_MACH_CRED:
1795 encode_op_map(xdr, &args->state_protect.enforce);
1796 encode_op_map(xdr, &args->state_protect.allow);
1797 break;
1798 default:
1799 WARN_ON_ONCE(1);
1800 break;
1801 }
1802
1803 if (send_implementation_id &&
1804 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1805 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1806 <= sizeof(impl_name) + 1)
1807 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1808 utsname()->sysname, utsname()->release,
1809 utsname()->version, utsname()->machine);
1810
1811 if (len > 0) {
1812 encode_uint32(xdr, 1); /* implementation id array length=1 */
1813
1814 encode_string(xdr,
1815 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1816 CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1817 encode_string(xdr, len, impl_name);
1818 /* just send zeros for nii_date - the date is in nii_name */
1819 p = reserve_space(xdr, 12);
1820 p = xdr_encode_hyper(p, 0);
1821 *p = cpu_to_be32(0);
1822 } else
1823 encode_uint32(xdr, 0); /* implementation id array length=0 */
1824 }
1825
1826 static void encode_create_session(struct xdr_stream *xdr,
1827 struct nfs41_create_session_args *args,
1828 struct compound_hdr *hdr)
1829 {
1830 __be32 *p;
1831 struct nfs_client *clp = args->client;
1832 struct rpc_clnt *clnt = clp->cl_rpcclient;
1833 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1834 u32 max_resp_sz_cached;
1835
1836 /*
1837 * Assumes OPEN is the biggest non-idempotent compound.
1838 * 2 is the verifier.
1839 */
1840 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1841 RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1842
1843 encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1844 p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1845 p = xdr_encode_hyper(p, args->clientid);
1846 *p++ = cpu_to_be32(args->seqid); /*Sequence id */
1847 *p++ = cpu_to_be32(args->flags); /*flags */
1848
1849 /* Fore Channel */
1850 *p++ = cpu_to_be32(0); /* header padding size */
1851 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1852 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1853 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1854 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1855 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1856 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1857
1858 /* Back Channel */
1859 *p++ = cpu_to_be32(0); /* header padding size */
1860 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1861 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1862 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1863 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1864 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1865 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1866
1867 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1868 *p++ = cpu_to_be32(1);
1869 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1870
1871 /* authsys_parms rfc1831 */
1872 *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1873 p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1874 *p++ = cpu_to_be32(0); /* UID */
1875 *p++ = cpu_to_be32(0); /* GID */
1876 *p = cpu_to_be32(0); /* No more gids */
1877 }
1878
1879 static void encode_destroy_session(struct xdr_stream *xdr,
1880 struct nfs4_session *session,
1881 struct compound_hdr *hdr)
1882 {
1883 encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1884 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1885 }
1886
1887 static void encode_destroy_clientid(struct xdr_stream *xdr,
1888 uint64_t clientid,
1889 struct compound_hdr *hdr)
1890 {
1891 encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1892 encode_uint64(xdr, clientid);
1893 }
1894
1895 static void encode_reclaim_complete(struct xdr_stream *xdr,
1896 struct nfs41_reclaim_complete_args *args,
1897 struct compound_hdr *hdr)
1898 {
1899 encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1900 encode_uint32(xdr, args->one_fs);
1901 }
1902 #endif /* CONFIG_NFS_V4_1 */
1903
1904 static void encode_sequence(struct xdr_stream *xdr,
1905 const struct nfs4_sequence_args *args,
1906 struct compound_hdr *hdr)
1907 {
1908 #if defined(CONFIG_NFS_V4_1)
1909 struct nfs4_session *session;
1910 struct nfs4_slot_table *tp;
1911 struct nfs4_slot *slot = args->sa_slot;
1912 __be32 *p;
1913
1914 tp = slot->table;
1915 session = tp->session;
1916 if (!session)
1917 return;
1918
1919 encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1920
1921 /*
1922 * Sessionid + seqid + slotid + max slotid + cache_this
1923 */
1924 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1925 "max_slotid=%d cache_this=%d\n",
1926 __func__,
1927 ((u32 *)session->sess_id.data)[0],
1928 ((u32 *)session->sess_id.data)[1],
1929 ((u32 *)session->sess_id.data)[2],
1930 ((u32 *)session->sess_id.data)[3],
1931 slot->seq_nr, slot->slot_nr,
1932 tp->highest_used_slotid, args->sa_cache_this);
1933 p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1934 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1935 *p++ = cpu_to_be32(slot->seq_nr);
1936 *p++ = cpu_to_be32(slot->slot_nr);
1937 *p++ = cpu_to_be32(tp->highest_used_slotid);
1938 *p = cpu_to_be32(args->sa_cache_this);
1939 #endif /* CONFIG_NFS_V4_1 */
1940 }
1941
1942 #ifdef CONFIG_NFS_V4_1
1943 static void
1944 encode_getdeviceinfo(struct xdr_stream *xdr,
1945 const struct nfs4_getdeviceinfo_args *args,
1946 struct compound_hdr *hdr)
1947 {
1948 __be32 *p;
1949
1950 encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1951 p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1952 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1953 NFS4_DEVICEID4_SIZE);
1954 *p++ = cpu_to_be32(args->pdev->layout_type);
1955 *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */
1956
1957 p = reserve_space(xdr, 4 + 4);
1958 *p++ = cpu_to_be32(1); /* bitmap length */
1959 *p++ = cpu_to_be32(args->notify_types);
1960 }
1961
1962 static void
1963 encode_layoutget(struct xdr_stream *xdr,
1964 const struct nfs4_layoutget_args *args,
1965 struct compound_hdr *hdr)
1966 {
1967 __be32 *p;
1968
1969 encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1970 p = reserve_space(xdr, 36);
1971 *p++ = cpu_to_be32(0); /* Signal layout available */
1972 *p++ = cpu_to_be32(args->type);
1973 *p++ = cpu_to_be32(args->range.iomode);
1974 p = xdr_encode_hyper(p, args->range.offset);
1975 p = xdr_encode_hyper(p, args->range.length);
1976 p = xdr_encode_hyper(p, args->minlength);
1977 encode_nfs4_stateid(xdr, &args->stateid);
1978 encode_uint32(xdr, args->maxcount);
1979
1980 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1981 __func__,
1982 args->type,
1983 args->range.iomode,
1984 (unsigned long)args->range.offset,
1985 (unsigned long)args->range.length,
1986 args->maxcount);
1987 }
1988
1989 static int
1990 encode_layoutcommit(struct xdr_stream *xdr,
1991 struct inode *inode,
1992 struct nfs4_layoutcommit_args *args,
1993 struct compound_hdr *hdr)
1994 {
1995 __be32 *p;
1996
1997 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1998 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1999
2000 encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2001 p = reserve_space(xdr, 20);
2002 /* Only whole file layouts */
2003 p = xdr_encode_hyper(p, 0); /* offset */
2004 p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
2005 *p = cpu_to_be32(0); /* reclaim */
2006 encode_nfs4_stateid(xdr, &args->stateid);
2007 if (args->lastbytewritten != U64_MAX) {
2008 p = reserve_space(xdr, 20);
2009 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2010 p = xdr_encode_hyper(p, args->lastbytewritten);
2011 } else {
2012 p = reserve_space(xdr, 12);
2013 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2014 }
2015 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2016 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2017
2018 if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) {
2019 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2020 NFS_I(inode)->layout, xdr, args);
2021 } else {
2022 encode_uint32(xdr, args->layoutupdate_len);
2023 if (args->layoutupdate_pages) {
2024 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2025 args->layoutupdate_len);
2026 }
2027 }
2028
2029 return 0;
2030 }
2031
2032 static void
2033 encode_layoutreturn(struct xdr_stream *xdr,
2034 const struct nfs4_layoutreturn_args *args,
2035 struct compound_hdr *hdr)
2036 {
2037 const struct pnfs_layoutdriver_type *lr_ops = NFS_SERVER(args->inode)->pnfs_curr_ld;
2038 __be32 *p;
2039
2040 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2041 p = reserve_space(xdr, 16);
2042 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
2043 *p++ = cpu_to_be32(args->layout_type);
2044 *p++ = cpu_to_be32(args->range.iomode);
2045 *p = cpu_to_be32(RETURN_FILE);
2046 p = reserve_space(xdr, 16);
2047 p = xdr_encode_hyper(p, args->range.offset);
2048 p = xdr_encode_hyper(p, args->range.length);
2049 spin_lock(&args->inode->i_lock);
2050 encode_nfs4_stateid(xdr, &args->stateid);
2051 spin_unlock(&args->inode->i_lock);
2052 if (args->ld_private->ops && args->ld_private->ops->encode)
2053 args->ld_private->ops->encode(xdr, args, args->ld_private);
2054 else if (lr_ops->encode_layoutreturn)
2055 lr_ops->encode_layoutreturn(xdr, args);
2056 else
2057 encode_uint32(xdr, 0);
2058 }
2059
2060 static int
2061 encode_secinfo_no_name(struct xdr_stream *xdr,
2062 const struct nfs41_secinfo_no_name_args *args,
2063 struct compound_hdr *hdr)
2064 {
2065 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2066 encode_uint32(xdr, args->style);
2067 return 0;
2068 }
2069
2070 static void encode_test_stateid(struct xdr_stream *xdr,
2071 struct nfs41_test_stateid_args *args,
2072 struct compound_hdr *hdr)
2073 {
2074 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2075 encode_uint32(xdr, 1);
2076 encode_nfs4_stateid(xdr, args->stateid);
2077 }
2078
2079 static void encode_free_stateid(struct xdr_stream *xdr,
2080 struct nfs41_free_stateid_args *args,
2081 struct compound_hdr *hdr)
2082 {
2083 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2084 encode_nfs4_stateid(xdr, &args->stateid);
2085 }
2086 #else
2087 static inline void
2088 encode_layoutreturn(struct xdr_stream *xdr,
2089 const struct nfs4_layoutreturn_args *args,
2090 struct compound_hdr *hdr)
2091 {
2092 }
2093 #endif /* CONFIG_NFS_V4_1 */
2094
2095 /*
2096 * END OF "GENERIC" ENCODE ROUTINES.
2097 */
2098
2099 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2100 {
2101 #if defined(CONFIG_NFS_V4_1)
2102 struct nfs4_session *session = args->sa_slot->table->session;
2103 if (session)
2104 return session->clp->cl_mvops->minor_version;
2105 #endif /* CONFIG_NFS_V4_1 */
2106 return 0;
2107 }
2108
2109 /*
2110 * Encode an ACCESS request
2111 */
2112 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2113 const struct nfs4_accessargs *args)
2114 {
2115 struct compound_hdr hdr = {
2116 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2117 };
2118
2119 encode_compound_hdr(xdr, req, &hdr);
2120 encode_sequence(xdr, &args->seq_args, &hdr);
2121 encode_putfh(xdr, args->fh, &hdr);
2122 encode_access(xdr, args->access, &hdr);
2123 encode_getfattr(xdr, args->bitmask, &hdr);
2124 encode_nops(&hdr);
2125 }
2126
2127 /*
2128 * Encode LOOKUP request
2129 */
2130 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2131 const struct nfs4_lookup_arg *args)
2132 {
2133 struct compound_hdr hdr = {
2134 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2135 };
2136
2137 encode_compound_hdr(xdr, req, &hdr);
2138 encode_sequence(xdr, &args->seq_args, &hdr);
2139 encode_putfh(xdr, args->dir_fh, &hdr);
2140 encode_lookup(xdr, args->name, &hdr);
2141 encode_getfh(xdr, &hdr);
2142 encode_getfattr(xdr, args->bitmask, &hdr);
2143 encode_nops(&hdr);
2144 }
2145
2146 /*
2147 * Encode LOOKUP_ROOT request
2148 */
2149 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2150 struct xdr_stream *xdr,
2151 const struct nfs4_lookup_root_arg *args)
2152 {
2153 struct compound_hdr hdr = {
2154 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2155 };
2156
2157 encode_compound_hdr(xdr, req, &hdr);
2158 encode_sequence(xdr, &args->seq_args, &hdr);
2159 encode_putrootfh(xdr, &hdr);
2160 encode_getfh(xdr, &hdr);
2161 encode_getfattr(xdr, args->bitmask, &hdr);
2162 encode_nops(&hdr);
2163 }
2164
2165 /*
2166 * Encode REMOVE request
2167 */
2168 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2169 const struct nfs_removeargs *args)
2170 {
2171 struct compound_hdr hdr = {
2172 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2173 };
2174
2175 encode_compound_hdr(xdr, req, &hdr);
2176 encode_sequence(xdr, &args->seq_args, &hdr);
2177 encode_putfh(xdr, args->fh, &hdr);
2178 encode_remove(xdr, &args->name, &hdr);
2179 encode_nops(&hdr);
2180 }
2181
2182 /*
2183 * Encode RENAME request
2184 */
2185 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2186 const struct nfs_renameargs *args)
2187 {
2188 struct compound_hdr hdr = {
2189 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2190 };
2191
2192 encode_compound_hdr(xdr, req, &hdr);
2193 encode_sequence(xdr, &args->seq_args, &hdr);
2194 encode_putfh(xdr, args->old_dir, &hdr);
2195 encode_savefh(xdr, &hdr);
2196 encode_putfh(xdr, args->new_dir, &hdr);
2197 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2198 encode_nops(&hdr);
2199 }
2200
2201 /*
2202 * Encode LINK request
2203 */
2204 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2205 const struct nfs4_link_arg *args)
2206 {
2207 struct compound_hdr hdr = {
2208 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2209 };
2210
2211 encode_compound_hdr(xdr, req, &hdr);
2212 encode_sequence(xdr, &args->seq_args, &hdr);
2213 encode_putfh(xdr, args->fh, &hdr);
2214 encode_savefh(xdr, &hdr);
2215 encode_putfh(xdr, args->dir_fh, &hdr);
2216 encode_link(xdr, args->name, &hdr);
2217 encode_restorefh(xdr, &hdr);
2218 encode_getfattr(xdr, args->bitmask, &hdr);
2219 encode_nops(&hdr);
2220 }
2221
2222 /*
2223 * Encode CREATE request
2224 */
2225 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2226 const struct nfs4_create_arg *args)
2227 {
2228 struct compound_hdr hdr = {
2229 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2230 };
2231
2232 encode_compound_hdr(xdr, req, &hdr);
2233 encode_sequence(xdr, &args->seq_args, &hdr);
2234 encode_putfh(xdr, args->dir_fh, &hdr);
2235 encode_create(xdr, args, &hdr);
2236 encode_getfh(xdr, &hdr);
2237 encode_getfattr(xdr, args->bitmask, &hdr);
2238 encode_nops(&hdr);
2239 }
2240
2241 /*
2242 * Encode SYMLINK request
2243 */
2244 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2245 const struct nfs4_create_arg *args)
2246 {
2247 nfs4_xdr_enc_create(req, xdr, args);
2248 }
2249
2250 /*
2251 * Encode GETATTR request
2252 */
2253 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2254 const struct nfs4_getattr_arg *args)
2255 {
2256 struct compound_hdr hdr = {
2257 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2258 };
2259
2260 encode_compound_hdr(xdr, req, &hdr);
2261 encode_sequence(xdr, &args->seq_args, &hdr);
2262 encode_putfh(xdr, args->fh, &hdr);
2263 encode_getfattr(xdr, args->bitmask, &hdr);
2264 encode_nops(&hdr);
2265 }
2266
2267 /*
2268 * Encode a CLOSE request
2269 */
2270 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2271 struct nfs_closeargs *args)
2272 {
2273 struct compound_hdr hdr = {
2274 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2275 };
2276
2277 encode_compound_hdr(xdr, req, &hdr);
2278 encode_sequence(xdr, &args->seq_args, &hdr);
2279 encode_putfh(xdr, args->fh, &hdr);
2280 if (args->lr_args)
2281 encode_layoutreturn(xdr, args->lr_args, &hdr);
2282 encode_close(xdr, args, &hdr);
2283 if (args->bitmask != NULL)
2284 encode_getfattr(xdr, args->bitmask, &hdr);
2285 encode_nops(&hdr);
2286 }
2287
2288 /*
2289 * Encode an OPEN request
2290 */
2291 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2292 struct nfs_openargs *args)
2293 {
2294 struct compound_hdr hdr = {
2295 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2296 };
2297
2298 encode_compound_hdr(xdr, req, &hdr);
2299 encode_sequence(xdr, &args->seq_args, &hdr);
2300 encode_putfh(xdr, args->fh, &hdr);
2301 encode_open(xdr, args, &hdr);
2302 encode_getfh(xdr, &hdr);
2303 if (args->access)
2304 encode_access(xdr, args->access, &hdr);
2305 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2306 encode_nops(&hdr);
2307 }
2308
2309 /*
2310 * Encode an OPEN_CONFIRM request
2311 */
2312 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2313 struct xdr_stream *xdr,
2314 struct nfs_open_confirmargs *args)
2315 {
2316 struct compound_hdr hdr = {
2317 .nops = 0,
2318 };
2319
2320 encode_compound_hdr(xdr, req, &hdr);
2321 encode_putfh(xdr, args->fh, &hdr);
2322 encode_open_confirm(xdr, args, &hdr);
2323 encode_nops(&hdr);
2324 }
2325
2326 /*
2327 * Encode an OPEN request with no attributes.
2328 */
2329 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2330 struct xdr_stream *xdr,
2331 struct nfs_openargs *args)
2332 {
2333 struct compound_hdr hdr = {
2334 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2335 };
2336
2337 encode_compound_hdr(xdr, req, &hdr);
2338 encode_sequence(xdr, &args->seq_args, &hdr);
2339 encode_putfh(xdr, args->fh, &hdr);
2340 encode_open(xdr, args, &hdr);
2341 if (args->access)
2342 encode_access(xdr, args->access, &hdr);
2343 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2344 encode_nops(&hdr);
2345 }
2346
2347 /*
2348 * Encode an OPEN_DOWNGRADE request
2349 */
2350 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2351 struct xdr_stream *xdr,
2352 struct nfs_closeargs *args)
2353 {
2354 struct compound_hdr hdr = {
2355 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2356 };
2357
2358 encode_compound_hdr(xdr, req, &hdr);
2359 encode_sequence(xdr, &args->seq_args, &hdr);
2360 encode_putfh(xdr, args->fh, &hdr);
2361 if (args->lr_args)
2362 encode_layoutreturn(xdr, args->lr_args, &hdr);
2363 encode_open_downgrade(xdr, args, &hdr);
2364 encode_nops(&hdr);
2365 }
2366
2367 /*
2368 * Encode a LOCK request
2369 */
2370 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2371 struct nfs_lock_args *args)
2372 {
2373 struct compound_hdr hdr = {
2374 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2375 };
2376
2377 encode_compound_hdr(xdr, req, &hdr);
2378 encode_sequence(xdr, &args->seq_args, &hdr);
2379 encode_putfh(xdr, args->fh, &hdr);
2380 encode_lock(xdr, args, &hdr);
2381 encode_nops(&hdr);
2382 }
2383
2384 /*
2385 * Encode a LOCKT request
2386 */
2387 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2388 struct nfs_lockt_args *args)
2389 {
2390 struct compound_hdr hdr = {
2391 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2392 };
2393
2394 encode_compound_hdr(xdr, req, &hdr);
2395 encode_sequence(xdr, &args->seq_args, &hdr);
2396 encode_putfh(xdr, args->fh, &hdr);
2397 encode_lockt(xdr, args, &hdr);
2398 encode_nops(&hdr);
2399 }
2400
2401 /*
2402 * Encode a LOCKU request
2403 */
2404 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2405 struct nfs_locku_args *args)
2406 {
2407 struct compound_hdr hdr = {
2408 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2409 };
2410
2411 encode_compound_hdr(xdr, req, &hdr);
2412 encode_sequence(xdr, &args->seq_args, &hdr);
2413 encode_putfh(xdr, args->fh, &hdr);
2414 encode_locku(xdr, args, &hdr);
2415 encode_nops(&hdr);
2416 }
2417
2418 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2419 struct xdr_stream *xdr,
2420 struct nfs_release_lockowner_args *args)
2421 {
2422 struct compound_hdr hdr = {
2423 .minorversion = 0,
2424 };
2425
2426 encode_compound_hdr(xdr, req, &hdr);
2427 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2428 encode_nops(&hdr);
2429 }
2430
2431 /*
2432 * Encode a READLINK request
2433 */
2434 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2435 const struct nfs4_readlink *args)
2436 {
2437 struct compound_hdr hdr = {
2438 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2439 };
2440
2441 encode_compound_hdr(xdr, req, &hdr);
2442 encode_sequence(xdr, &args->seq_args, &hdr);
2443 encode_putfh(xdr, args->fh, &hdr);
2444 encode_readlink(xdr, args, req, &hdr);
2445
2446 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2447 args->pgbase, args->pglen);
2448 encode_nops(&hdr);
2449 }
2450
2451 /*
2452 * Encode a READDIR request
2453 */
2454 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2455 const struct nfs4_readdir_arg *args)
2456 {
2457 struct compound_hdr hdr = {
2458 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2459 };
2460
2461 encode_compound_hdr(xdr, req, &hdr);
2462 encode_sequence(xdr, &args->seq_args, &hdr);
2463 encode_putfh(xdr, args->fh, &hdr);
2464 encode_readdir(xdr, args, req, &hdr);
2465
2466 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2467 args->pgbase, args->count);
2468 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2469 __func__, hdr.replen << 2, args->pages,
2470 args->pgbase, args->count);
2471 encode_nops(&hdr);
2472 }
2473
2474 /*
2475 * Encode a READ request
2476 */
2477 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2478 struct nfs_pgio_args *args)
2479 {
2480 struct compound_hdr hdr = {
2481 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2482 };
2483
2484 encode_compound_hdr(xdr, req, &hdr);
2485 encode_sequence(xdr, &args->seq_args, &hdr);
2486 encode_putfh(xdr, args->fh, &hdr);
2487 encode_read(xdr, args, &hdr);
2488
2489 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2490 args->pages, args->pgbase, args->count);
2491 req->rq_rcv_buf.flags |= XDRBUF_READ;
2492 encode_nops(&hdr);
2493 }
2494
2495 /*
2496 * Encode an SETATTR request
2497 */
2498 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2499 struct nfs_setattrargs *args)
2500 {
2501 struct compound_hdr hdr = {
2502 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2503 };
2504
2505 encode_compound_hdr(xdr, req, &hdr);
2506 encode_sequence(xdr, &args->seq_args, &hdr);
2507 encode_putfh(xdr, args->fh, &hdr);
2508 encode_setattr(xdr, args, args->server, &hdr);
2509 encode_getfattr(xdr, args->bitmask, &hdr);
2510 encode_nops(&hdr);
2511 }
2512
2513 /*
2514 * Encode a GETACL request
2515 */
2516 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2517 struct nfs_getaclargs *args)
2518 {
2519 struct compound_hdr hdr = {
2520 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2521 };
2522 uint32_t replen;
2523
2524 encode_compound_hdr(xdr, req, &hdr);
2525 encode_sequence(xdr, &args->seq_args, &hdr);
2526 encode_putfh(xdr, args->fh, &hdr);
2527 replen = hdr.replen + op_decode_hdr_maxsz + 1;
2528 encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2529
2530 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2531 args->acl_pages, 0, args->acl_len);
2532
2533 encode_nops(&hdr);
2534 }
2535
2536 /*
2537 * Encode a WRITE request
2538 */
2539 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2540 struct nfs_pgio_args *args)
2541 {
2542 struct compound_hdr hdr = {
2543 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2544 };
2545
2546 encode_compound_hdr(xdr, req, &hdr);
2547 encode_sequence(xdr, &args->seq_args, &hdr);
2548 encode_putfh(xdr, args->fh, &hdr);
2549 encode_write(xdr, args, &hdr);
2550 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2551 if (args->bitmask)
2552 encode_getfattr(xdr, args->bitmask, &hdr);
2553 encode_nops(&hdr);
2554 }
2555
2556 /*
2557 * a COMMIT request
2558 */
2559 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2560 struct nfs_commitargs *args)
2561 {
2562 struct compound_hdr hdr = {
2563 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2564 };
2565
2566 encode_compound_hdr(xdr, req, &hdr);
2567 encode_sequence(xdr, &args->seq_args, &hdr);
2568 encode_putfh(xdr, args->fh, &hdr);
2569 encode_commit(xdr, args, &hdr);
2570 encode_nops(&hdr);
2571 }
2572
2573 /*
2574 * FSINFO request
2575 */
2576 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2577 struct nfs4_fsinfo_arg *args)
2578 {
2579 struct compound_hdr hdr = {
2580 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2581 };
2582
2583 encode_compound_hdr(xdr, req, &hdr);
2584 encode_sequence(xdr, &args->seq_args, &hdr);
2585 encode_putfh(xdr, args->fh, &hdr);
2586 encode_fsinfo(xdr, args->bitmask, &hdr);
2587 encode_nops(&hdr);
2588 }
2589
2590 /*
2591 * a PATHCONF request
2592 */
2593 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2594 const struct nfs4_pathconf_arg *args)
2595 {
2596 struct compound_hdr hdr = {
2597 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2598 };
2599
2600 encode_compound_hdr(xdr, req, &hdr);
2601 encode_sequence(xdr, &args->seq_args, &hdr);
2602 encode_putfh(xdr, args->fh, &hdr);
2603 encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2604 &hdr);
2605 encode_nops(&hdr);
2606 }
2607
2608 /*
2609 * a STATFS request
2610 */
2611 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2612 const struct nfs4_statfs_arg *args)
2613 {
2614 struct compound_hdr hdr = {
2615 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2616 };
2617
2618 encode_compound_hdr(xdr, req, &hdr);
2619 encode_sequence(xdr, &args->seq_args, &hdr);
2620 encode_putfh(xdr, args->fh, &hdr);
2621 encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2622 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2623 encode_nops(&hdr);
2624 }
2625
2626 /*
2627 * GETATTR_BITMAP request
2628 */
2629 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2630 struct xdr_stream *xdr,
2631 struct nfs4_server_caps_arg *args)
2632 {
2633 const u32 *bitmask = args->bitmask;
2634 struct compound_hdr hdr = {
2635 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2636 };
2637
2638 encode_compound_hdr(xdr, req, &hdr);
2639 encode_sequence(xdr, &args->seq_args, &hdr);
2640 encode_putfh(xdr, args->fhandle, &hdr);
2641 encode_getattr_three(xdr, bitmask[0], bitmask[1], bitmask[2], &hdr);
2642 encode_nops(&hdr);
2643 }
2644
2645 /*
2646 * a RENEW request
2647 */
2648 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2649 struct nfs_client *clp)
2650 {
2651 struct compound_hdr hdr = {
2652 .nops = 0,
2653 };
2654
2655 encode_compound_hdr(xdr, req, &hdr);
2656 encode_renew(xdr, clp->cl_clientid, &hdr);
2657 encode_nops(&hdr);
2658 }
2659
2660 /*
2661 * a SETCLIENTID request
2662 */
2663 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2664 struct xdr_stream *xdr,
2665 struct nfs4_setclientid *sc)
2666 {
2667 struct compound_hdr hdr = {
2668 .nops = 0,
2669 };
2670
2671 encode_compound_hdr(xdr, req, &hdr);
2672 encode_setclientid(xdr, sc, &hdr);
2673 encode_nops(&hdr);
2674 }
2675
2676 /*
2677 * a SETCLIENTID_CONFIRM request
2678 */
2679 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2680 struct xdr_stream *xdr,
2681 struct nfs4_setclientid_res *arg)
2682 {
2683 struct compound_hdr hdr = {
2684 .nops = 0,
2685 };
2686
2687 encode_compound_hdr(xdr, req, &hdr);
2688 encode_setclientid_confirm(xdr, arg, &hdr);
2689 encode_nops(&hdr);
2690 }
2691
2692 /*
2693 * DELEGRETURN request
2694 */
2695 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2696 struct xdr_stream *xdr,
2697 const struct nfs4_delegreturnargs *args)
2698 {
2699 struct compound_hdr hdr = {
2700 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2701 };
2702
2703 encode_compound_hdr(xdr, req, &hdr);
2704 encode_sequence(xdr, &args->seq_args, &hdr);
2705 encode_putfh(xdr, args->fhandle, &hdr);
2706 if (args->lr_args)
2707 encode_layoutreturn(xdr, args->lr_args, &hdr);
2708 encode_getfattr(xdr, args->bitmask, &hdr);
2709 encode_delegreturn(xdr, args->stateid, &hdr);
2710 encode_nops(&hdr);
2711 }
2712
2713 /*
2714 * Encode FS_LOCATIONS request
2715 */
2716 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2717 struct xdr_stream *xdr,
2718 struct nfs4_fs_locations_arg *args)
2719 {
2720 struct compound_hdr hdr = {
2721 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2722 };
2723 uint32_t replen;
2724
2725 encode_compound_hdr(xdr, req, &hdr);
2726 encode_sequence(xdr, &args->seq_args, &hdr);
2727 if (args->migration) {
2728 encode_putfh(xdr, args->fh, &hdr);
2729 replen = hdr.replen;
2730 encode_fs_locations(xdr, args->bitmask, &hdr);
2731 if (args->renew)
2732 encode_renew(xdr, args->clientid, &hdr);
2733 } else {
2734 encode_putfh(xdr, args->dir_fh, &hdr);
2735 encode_lookup(xdr, args->name, &hdr);
2736 replen = hdr.replen;
2737 encode_fs_locations(xdr, args->bitmask, &hdr);
2738 }
2739
2740 /* Set up reply kvec to capture returned fs_locations array. */
2741 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2742 0, PAGE_SIZE);
2743 encode_nops(&hdr);
2744 }
2745
2746 /*
2747 * Encode SECINFO request
2748 */
2749 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2750 struct xdr_stream *xdr,
2751 struct nfs4_secinfo_arg *args)
2752 {
2753 struct compound_hdr hdr = {
2754 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2755 };
2756
2757 encode_compound_hdr(xdr, req, &hdr);
2758 encode_sequence(xdr, &args->seq_args, &hdr);
2759 encode_putfh(xdr, args->dir_fh, &hdr);
2760 encode_secinfo(xdr, args->name, &hdr);
2761 encode_nops(&hdr);
2762 }
2763
2764 /*
2765 * Encode FSID_PRESENT request
2766 */
2767 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2768 struct xdr_stream *xdr,
2769 struct nfs4_fsid_present_arg *args)
2770 {
2771 struct compound_hdr hdr = {
2772 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2773 };
2774
2775 encode_compound_hdr(xdr, req, &hdr);
2776 encode_sequence(xdr, &args->seq_args, &hdr);
2777 encode_putfh(xdr, args->fh, &hdr);
2778 encode_getfh(xdr, &hdr);
2779 if (args->renew)
2780 encode_renew(xdr, args->clientid, &hdr);
2781 encode_nops(&hdr);
2782 }
2783
2784 #if defined(CONFIG_NFS_V4_1)
2785 /*
2786 * BIND_CONN_TO_SESSION request
2787 */
2788 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2789 struct xdr_stream *xdr,
2790 struct nfs41_bind_conn_to_session_args *args)
2791 {
2792 struct compound_hdr hdr = {
2793 .minorversion = args->client->cl_mvops->minor_version,
2794 };
2795
2796 encode_compound_hdr(xdr, req, &hdr);
2797 encode_bind_conn_to_session(xdr, args, &hdr);
2798 encode_nops(&hdr);
2799 }
2800
2801 /*
2802 * EXCHANGE_ID request
2803 */
2804 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2805 struct xdr_stream *xdr,
2806 struct nfs41_exchange_id_args *args)
2807 {
2808 struct compound_hdr hdr = {
2809 .minorversion = args->client->cl_mvops->minor_version,
2810 };
2811
2812 encode_compound_hdr(xdr, req, &hdr);
2813 encode_exchange_id(xdr, args, &hdr);
2814 encode_nops(&hdr);
2815 }
2816
2817 /*
2818 * a CREATE_SESSION request
2819 */
2820 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2821 struct xdr_stream *xdr,
2822 struct nfs41_create_session_args *args)
2823 {
2824 struct compound_hdr hdr = {
2825 .minorversion = args->client->cl_mvops->minor_version,
2826 };
2827
2828 encode_compound_hdr(xdr, req, &hdr);
2829 encode_create_session(xdr, args, &hdr);
2830 encode_nops(&hdr);
2831 }
2832
2833 /*
2834 * a DESTROY_SESSION request
2835 */
2836 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2837 struct xdr_stream *xdr,
2838 struct nfs4_session *session)
2839 {
2840 struct compound_hdr hdr = {
2841 .minorversion = session->clp->cl_mvops->minor_version,
2842 };
2843
2844 encode_compound_hdr(xdr, req, &hdr);
2845 encode_destroy_session(xdr, session, &hdr);
2846 encode_nops(&hdr);
2847 }
2848
2849 /*
2850 * a DESTROY_CLIENTID request
2851 */
2852 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2853 struct xdr_stream *xdr,
2854 struct nfs_client *clp)
2855 {
2856 struct compound_hdr hdr = {
2857 .minorversion = clp->cl_mvops->minor_version,
2858 };
2859
2860 encode_compound_hdr(xdr, req, &hdr);
2861 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2862 encode_nops(&hdr);
2863 }
2864
2865 /*
2866 * a SEQUENCE request
2867 */
2868 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2869 struct nfs4_sequence_args *args)
2870 {
2871 struct compound_hdr hdr = {
2872 .minorversion = nfs4_xdr_minorversion(args),
2873 };
2874
2875 encode_compound_hdr(xdr, req, &hdr);
2876 encode_sequence(xdr, args, &hdr);
2877 encode_nops(&hdr);
2878 }
2879
2880 /*
2881 * a GET_LEASE_TIME request
2882 */
2883 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2884 struct xdr_stream *xdr,
2885 struct nfs4_get_lease_time_args *args)
2886 {
2887 struct compound_hdr hdr = {
2888 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2889 };
2890 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2891
2892 encode_compound_hdr(xdr, req, &hdr);
2893 encode_sequence(xdr, &args->la_seq_args, &hdr);
2894 encode_putrootfh(xdr, &hdr);
2895 encode_fsinfo(xdr, lease_bitmap, &hdr);
2896 encode_nops(&hdr);
2897 }
2898
2899 /*
2900 * a RECLAIM_COMPLETE request
2901 */
2902 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2903 struct xdr_stream *xdr,
2904 struct nfs41_reclaim_complete_args *args)
2905 {
2906 struct compound_hdr hdr = {
2907 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2908 };
2909
2910 encode_compound_hdr(xdr, req, &hdr);
2911 encode_sequence(xdr, &args->seq_args, &hdr);
2912 encode_reclaim_complete(xdr, args, &hdr);
2913 encode_nops(&hdr);
2914 }
2915
2916 /*
2917 * Encode GETDEVICEINFO request
2918 */
2919 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2920 struct xdr_stream *xdr,
2921 struct nfs4_getdeviceinfo_args *args)
2922 {
2923 struct compound_hdr hdr = {
2924 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2925 };
2926
2927 encode_compound_hdr(xdr, req, &hdr);
2928 encode_sequence(xdr, &args->seq_args, &hdr);
2929 encode_getdeviceinfo(xdr, args, &hdr);
2930
2931 /* set up reply kvec. Subtract notification bitmap max size (2)
2932 * so that notification bitmap is put in xdr_buf tail */
2933 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2934 args->pdev->pages, args->pdev->pgbase,
2935 args->pdev->pglen);
2936
2937 encode_nops(&hdr);
2938 }
2939
2940 /*
2941 * Encode LAYOUTGET request
2942 */
2943 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2944 struct xdr_stream *xdr,
2945 struct nfs4_layoutget_args *args)
2946 {
2947 struct compound_hdr hdr = {
2948 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2949 };
2950
2951 encode_compound_hdr(xdr, req, &hdr);
2952 encode_sequence(xdr, &args->seq_args, &hdr);
2953 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2954 encode_layoutget(xdr, args, &hdr);
2955
2956 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2957 args->layout.pages, 0, args->layout.pglen);
2958
2959 encode_nops(&hdr);
2960 }
2961
2962 /*
2963 * Encode LAYOUTCOMMIT request
2964 */
2965 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2966 struct xdr_stream *xdr,
2967 struct nfs4_layoutcommit_args *args)
2968 {
2969 struct nfs4_layoutcommit_data *data =
2970 container_of(args, struct nfs4_layoutcommit_data, args);
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_putfh(xdr, NFS_FH(args->inode), &hdr);
2978 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2979 encode_getfattr(xdr, args->bitmask, &hdr);
2980 encode_nops(&hdr);
2981 }
2982
2983 /*
2984 * Encode LAYOUTRETURN request
2985 */
2986 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2987 struct xdr_stream *xdr,
2988 struct nfs4_layoutreturn_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_putfh(xdr, NFS_FH(args->inode), &hdr);
2997 encode_layoutreturn(xdr, args, &hdr);
2998 encode_nops(&hdr);
2999 }
3000
3001 /*
3002 * Encode SECINFO_NO_NAME request
3003 */
3004 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3005 struct xdr_stream *xdr,
3006 struct nfs41_secinfo_no_name_args *args)
3007 {
3008 struct compound_hdr hdr = {
3009 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3010 };
3011
3012 encode_compound_hdr(xdr, req, &hdr);
3013 encode_sequence(xdr, &args->seq_args, &hdr);
3014 encode_putrootfh(xdr, &hdr);
3015 encode_secinfo_no_name(xdr, args, &hdr);
3016 encode_nops(&hdr);
3017 return 0;
3018 }
3019
3020 /*
3021 * Encode TEST_STATEID request
3022 */
3023 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3024 struct xdr_stream *xdr,
3025 struct nfs41_test_stateid_args *args)
3026 {
3027 struct compound_hdr hdr = {
3028 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3029 };
3030
3031 encode_compound_hdr(xdr, req, &hdr);
3032 encode_sequence(xdr, &args->seq_args, &hdr);
3033 encode_test_stateid(xdr, args, &hdr);
3034 encode_nops(&hdr);
3035 }
3036
3037 /*
3038 * Encode FREE_STATEID request
3039 */
3040 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3041 struct xdr_stream *xdr,
3042 struct nfs41_free_stateid_args *args)
3043 {
3044 struct compound_hdr hdr = {
3045 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3046 };
3047
3048 encode_compound_hdr(xdr, req, &hdr);
3049 encode_sequence(xdr, &args->seq_args, &hdr);
3050 encode_free_stateid(xdr, args, &hdr);
3051 encode_nops(&hdr);
3052 }
3053 #endif /* CONFIG_NFS_V4_1 */
3054
3055 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3056 {
3057 dprintk("nfs: %s: prematurely hit end of receive buffer. "
3058 "Remaining buffer length is %tu words.\n",
3059 func, xdr->end - xdr->p);
3060 }
3061
3062 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3063 {
3064 __be32 *p;
3065
3066 p = xdr_inline_decode(xdr, 4);
3067 if (unlikely(!p))
3068 goto out_overflow;
3069 *len = be32_to_cpup(p);
3070 p = xdr_inline_decode(xdr, *len);
3071 if (unlikely(!p))
3072 goto out_overflow;
3073 *string = (char *)p;
3074 return 0;
3075 out_overflow:
3076 print_overflow_msg(__func__, xdr);
3077 return -EIO;
3078 }
3079
3080 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3081 {
3082 __be32 *p;
3083
3084 p = xdr_inline_decode(xdr, 8);
3085 if (unlikely(!p))
3086 goto out_overflow;
3087 hdr->status = be32_to_cpup(p++);
3088 hdr->taglen = be32_to_cpup(p);
3089
3090 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3091 if (unlikely(!p))
3092 goto out_overflow;
3093 hdr->tag = (char *)p;
3094 p += XDR_QUADLEN(hdr->taglen);
3095 hdr->nops = be32_to_cpup(p);
3096 if (unlikely(hdr->nops < 1))
3097 return nfs4_stat_to_errno(hdr->status);
3098 return 0;
3099 out_overflow:
3100 print_overflow_msg(__func__, xdr);
3101 return -EIO;
3102 }
3103
3104 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3105 int *nfs_retval)
3106 {
3107 __be32 *p;
3108 uint32_t opnum;
3109 int32_t nfserr;
3110
3111 p = xdr_inline_decode(xdr, 8);
3112 if (unlikely(!p))
3113 goto out_overflow;
3114 opnum = be32_to_cpup(p++);
3115 if (unlikely(opnum != expected))
3116 goto out_bad_operation;
3117 nfserr = be32_to_cpup(p);
3118 if (nfserr == NFS_OK)
3119 *nfs_retval = 0;
3120 else
3121 *nfs_retval = nfs4_stat_to_errno(nfserr);
3122 return true;
3123 out_bad_operation:
3124 dprintk("nfs: Server returned operation"
3125 " %d but we issued a request for %d\n",
3126 opnum, expected);
3127 *nfs_retval = -EREMOTEIO;
3128 return false;
3129 out_overflow:
3130 print_overflow_msg(__func__, xdr);
3131 *nfs_retval = -EIO;
3132 return false;
3133 }
3134
3135 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3136 {
3137 int retval;
3138
3139 __decode_op_hdr(xdr, expected, &retval);
3140 return retval;
3141 }
3142
3143 /* Dummy routine */
3144 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3145 {
3146 __be32 *p;
3147 unsigned int strlen;
3148 char *str;
3149
3150 p = xdr_inline_decode(xdr, 12);
3151 if (likely(p))
3152 return decode_opaque_inline(xdr, &strlen, &str);
3153 print_overflow_msg(__func__, xdr);
3154 return -EIO;
3155 }
3156
3157 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3158 {
3159 uint32_t bmlen;
3160 __be32 *p;
3161
3162 p = xdr_inline_decode(xdr, 4);
3163 if (unlikely(!p))
3164 goto out_overflow;
3165 bmlen = be32_to_cpup(p);
3166
3167 bitmap[0] = bitmap[1] = bitmap[2] = 0;
3168 p = xdr_inline_decode(xdr, (bmlen << 2));
3169 if (unlikely(!p))
3170 goto out_overflow;
3171 if (bmlen > 0) {
3172 bitmap[0] = be32_to_cpup(p++);
3173 if (bmlen > 1) {
3174 bitmap[1] = be32_to_cpup(p++);
3175 if (bmlen > 2)
3176 bitmap[2] = be32_to_cpup(p);
3177 }
3178 }
3179 return 0;
3180 out_overflow:
3181 print_overflow_msg(__func__, xdr);
3182 return -EIO;
3183 }
3184
3185 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3186 {
3187 __be32 *p;
3188
3189 p = xdr_inline_decode(xdr, 4);
3190 if (unlikely(!p))
3191 goto out_overflow;
3192 *attrlen = be32_to_cpup(p);
3193 *savep = xdr_stream_pos(xdr);
3194 return 0;
3195 out_overflow:
3196 print_overflow_msg(__func__, xdr);
3197 return -EIO;
3198 }
3199
3200 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3201 {
3202 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3203 int ret;
3204 ret = decode_attr_bitmap(xdr, bitmask);
3205 if (unlikely(ret < 0))
3206 return ret;
3207 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3208 } else
3209 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3210 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3211 bitmask[0], bitmask[1], bitmask[2]);
3212 return 0;
3213 }
3214
3215 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3216 {
3217 __be32 *p;
3218 int ret = 0;
3219
3220 *type = 0;
3221 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3222 return -EIO;
3223 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3224 p = xdr_inline_decode(xdr, 4);
3225 if (unlikely(!p))
3226 goto out_overflow;
3227 *type = be32_to_cpup(p);
3228 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3229 dprintk("%s: bad type %d\n", __func__, *type);
3230 return -EIO;
3231 }
3232 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3233 ret = NFS_ATTR_FATTR_TYPE;
3234 }
3235 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3236 return ret;
3237 out_overflow:
3238 print_overflow_msg(__func__, xdr);
3239 return -EIO;
3240 }
3241
3242 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3243 uint32_t *bitmap, uint32_t *type)
3244 {
3245 __be32 *p;
3246
3247 *type = 0;
3248 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3249 return -EIO;
3250 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3251 p = xdr_inline_decode(xdr, 4);
3252 if (unlikely(!p))
3253 goto out_overflow;
3254 *type = be32_to_cpup(p);
3255 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3256 }
3257 dprintk("%s: expire type=0x%x\n", __func__, *type);
3258 return 0;
3259 out_overflow:
3260 print_overflow_msg(__func__, xdr);
3261 return -EIO;
3262 }
3263
3264 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3265 {
3266 __be32 *p;
3267 int ret = 0;
3268
3269 *change = 0;
3270 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3271 return -EIO;
3272 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3273 p = xdr_inline_decode(xdr, 8);
3274 if (unlikely(!p))
3275 goto out_overflow;
3276 xdr_decode_hyper(p, change);
3277 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3278 ret = NFS_ATTR_FATTR_CHANGE;
3279 }
3280 dprintk("%s: change attribute=%Lu\n", __func__,
3281 (unsigned long long)*change);
3282 return ret;
3283 out_overflow:
3284 print_overflow_msg(__func__, xdr);
3285 return -EIO;
3286 }
3287
3288 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3289 {
3290 __be32 *p;
3291 int ret = 0;
3292
3293 *size = 0;
3294 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3295 return -EIO;
3296 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3297 p = xdr_inline_decode(xdr, 8);
3298 if (unlikely(!p))
3299 goto out_overflow;
3300 xdr_decode_hyper(p, size);
3301 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3302 ret = NFS_ATTR_FATTR_SIZE;
3303 }
3304 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3305 return ret;
3306 out_overflow:
3307 print_overflow_msg(__func__, xdr);
3308 return -EIO;
3309 }
3310
3311 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3312 {
3313 __be32 *p;
3314
3315 *res = 0;
3316 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3317 return -EIO;
3318 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3319 p = xdr_inline_decode(xdr, 4);
3320 if (unlikely(!p))
3321 goto out_overflow;
3322 *res = be32_to_cpup(p);
3323 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3324 }
3325 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3326 return 0;
3327 out_overflow:
3328 print_overflow_msg(__func__, xdr);
3329 return -EIO;
3330 }
3331
3332 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3333 {
3334 __be32 *p;
3335
3336 *res = 0;
3337 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3338 return -EIO;
3339 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3340 p = xdr_inline_decode(xdr, 4);
3341 if (unlikely(!p))
3342 goto out_overflow;
3343 *res = be32_to_cpup(p);
3344 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3345 }
3346 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3347 return 0;
3348 out_overflow:
3349 print_overflow_msg(__func__, xdr);
3350 return -EIO;
3351 }
3352
3353 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3354 {
3355 __be32 *p;
3356 int ret = 0;
3357
3358 fsid->major = 0;
3359 fsid->minor = 0;
3360 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3361 return -EIO;
3362 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3363 p = xdr_inline_decode(xdr, 16);
3364 if (unlikely(!p))
3365 goto out_overflow;
3366 p = xdr_decode_hyper(p, &fsid->major);
3367 xdr_decode_hyper(p, &fsid->minor);
3368 bitmap[0] &= ~FATTR4_WORD0_FSID;
3369 ret = NFS_ATTR_FATTR_FSID;
3370 }
3371 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3372 (unsigned long long)fsid->major,
3373 (unsigned long long)fsid->minor);
3374 return ret;
3375 out_overflow:
3376 print_overflow_msg(__func__, xdr);
3377 return -EIO;
3378 }
3379
3380 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3381 {
3382 __be32 *p;
3383
3384 *res = 60;
3385 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3386 return -EIO;
3387 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3388 p = xdr_inline_decode(xdr, 4);
3389 if (unlikely(!p))
3390 goto out_overflow;
3391 *res = be32_to_cpup(p);
3392 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3393 }
3394 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3395 return 0;
3396 out_overflow:
3397 print_overflow_msg(__func__, xdr);
3398 return -EIO;
3399 }
3400
3401 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3402 {
3403 __be32 *p;
3404
3405 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3406 return -EIO;
3407 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3408 p = xdr_inline_decode(xdr, 4);
3409 if (unlikely(!p))
3410 goto out_overflow;
3411 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3412 *res = -be32_to_cpup(p);
3413 }
3414 return 0;
3415 out_overflow:
3416 print_overflow_msg(__func__, xdr);
3417 return -EIO;
3418 }
3419
3420 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3421 uint32_t *bitmap, uint32_t *bitmask)
3422 {
3423 if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3424 int ret;
3425 ret = decode_attr_bitmap(xdr, bitmask);
3426 if (unlikely(ret < 0))
3427 return ret;
3428 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3429 } else
3430 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3431 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3432 bitmask[0], bitmask[1], bitmask[2]);
3433 return 0;
3434 }
3435
3436 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3437 {
3438 __be32 *p;
3439 int len;
3440
3441 if (fh != NULL)
3442 memset(fh, 0, sizeof(*fh));
3443
3444 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3445 return -EIO;
3446 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3447 p = xdr_inline_decode(xdr, 4);
3448 if (unlikely(!p))
3449 goto out_overflow;
3450 len = be32_to_cpup(p);
3451 if (len > NFS4_FHSIZE)
3452 return -EIO;
3453 p = xdr_inline_decode(xdr, len);
3454 if (unlikely(!p))
3455 goto out_overflow;
3456 if (fh != NULL) {
3457 memcpy(fh->data, p, len);
3458 fh->size = len;
3459 }
3460 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3461 }
3462 return 0;
3463 out_overflow:
3464 print_overflow_msg(__func__, xdr);
3465 return -EIO;
3466 }
3467
3468 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3469 {
3470 __be32 *p;
3471
3472 *res = 0;
3473 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3474 return -EIO;
3475 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3476 p = xdr_inline_decode(xdr, 4);
3477 if (unlikely(!p))
3478 goto out_overflow;
3479 *res = be32_to_cpup(p);
3480 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3481 }
3482 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3483 return 0;
3484 out_overflow:
3485 print_overflow_msg(__func__, xdr);
3486 return -EIO;
3487 }
3488
3489 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3490 {
3491 __be32 *p;
3492 int ret = 0;
3493
3494 *fileid = 0;
3495 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3496 return -EIO;
3497 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3498 p = xdr_inline_decode(xdr, 8);
3499 if (unlikely(!p))
3500 goto out_overflow;
3501 xdr_decode_hyper(p, fileid);
3502 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3503 ret = NFS_ATTR_FATTR_FILEID;
3504 }
3505 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3506 return ret;
3507 out_overflow:
3508 print_overflow_msg(__func__, xdr);
3509 return -EIO;
3510 }
3511
3512 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3513 {
3514 __be32 *p;
3515 int ret = 0;
3516
3517 *fileid = 0;
3518 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3519 return -EIO;
3520 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3521 p = xdr_inline_decode(xdr, 8);
3522 if (unlikely(!p))
3523 goto out_overflow;
3524 xdr_decode_hyper(p, fileid);
3525 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3526 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3527 }
3528 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3529 return ret;
3530 out_overflow:
3531 print_overflow_msg(__func__, xdr);
3532 return -EIO;
3533 }
3534
3535 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3536 {
3537 __be32 *p;
3538 int status = 0;
3539
3540 *res = 0;
3541 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3542 return -EIO;
3543 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3544 p = xdr_inline_decode(xdr, 8);
3545 if (unlikely(!p))
3546 goto out_overflow;
3547 xdr_decode_hyper(p, res);
3548 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3549 }
3550 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3551 return status;
3552 out_overflow:
3553 print_overflow_msg(__func__, xdr);
3554 return -EIO;
3555 }
3556
3557 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3558 {
3559 __be32 *p;
3560 int status = 0;
3561
3562 *res = 0;
3563 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3564 return -EIO;
3565 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3566 p = xdr_inline_decode(xdr, 8);
3567 if (unlikely(!p))
3568 goto out_overflow;
3569 xdr_decode_hyper(p, res);
3570 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3571 }
3572 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3573 return status;
3574 out_overflow:
3575 print_overflow_msg(__func__, xdr);
3576 return -EIO;
3577 }
3578
3579 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3580 {
3581 __be32 *p;
3582 int status = 0;
3583
3584 *res = 0;
3585 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3586 return -EIO;
3587 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3588 p = xdr_inline_decode(xdr, 8);
3589 if (unlikely(!p))
3590 goto out_overflow;
3591 xdr_decode_hyper(p, res);
3592 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3593 }
3594 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3595 return status;
3596 out_overflow:
3597 print_overflow_msg(__func__, xdr);
3598 return -EIO;
3599 }
3600
3601 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3602 {
3603 u32 n;
3604 __be32 *p;
3605 int status = 0;
3606
3607 p = xdr_inline_decode(xdr, 4);
3608 if (unlikely(!p))
3609 goto out_overflow;
3610 n = be32_to_cpup(p);
3611 if (n == 0)
3612 goto root_path;
3613 dprintk("pathname4: ");
3614 if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3615 dprintk("cannot parse %d components in path\n", n);
3616 goto out_eio;
3617 }
3618 for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3619 struct nfs4_string *component = &path->components[path->ncomponents];
3620 status = decode_opaque_inline(xdr, &component->len, &component->data);
3621 if (unlikely(status != 0))
3622 goto out_eio;
3623 ifdebug (XDR)
3624 pr_cont("%s%.*s ",
3625 (path->ncomponents != n ? "/ " : ""),
3626 component->len, component->data);
3627 }
3628 out:
3629 return status;
3630 root_path:
3631 /* a root pathname is sent as a zero component4 */
3632 path->ncomponents = 1;
3633 path->components[0].len=0;
3634 path->components[0].data=NULL;
3635 dprintk("pathname4: /\n");
3636 goto out;
3637 out_eio:
3638 dprintk(" status %d", status);
3639 status = -EIO;
3640 goto out;
3641 out_overflow:
3642 print_overflow_msg(__func__, xdr);
3643 return -EIO;
3644 }
3645
3646 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3647 {
3648 int n;
3649 __be32 *p;
3650 int status = -EIO;
3651
3652 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3653 goto out;
3654 status = 0;
3655 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3656 goto out;
3657 bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3658 status = -EIO;
3659 /* Ignore borken servers that return unrequested attrs */
3660 if (unlikely(res == NULL))
3661 goto out;
3662 dprintk("%s: fsroot:\n", __func__);
3663 status = decode_pathname(xdr, &res->fs_path);
3664 if (unlikely(status != 0))
3665 goto out;
3666 p = xdr_inline_decode(xdr, 4);
3667 if (unlikely(!p))
3668 goto out_overflow;
3669 n = be32_to_cpup(p);
3670 if (n <= 0)
3671 goto out_eio;
3672 for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3673 u32 m;
3674 struct nfs4_fs_location *loc;
3675
3676 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3677 break;
3678 loc = &res->locations[res->nlocations];
3679 p = xdr_inline_decode(xdr, 4);
3680 if (unlikely(!p))
3681 goto out_overflow;
3682 m = be32_to_cpup(p);
3683
3684 dprintk("%s: servers:\n", __func__);
3685 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3686 struct nfs4_string *server;
3687
3688 if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3689 unsigned int i;
3690 dprintk("%s: using first %u of %u servers "
3691 "returned for location %u\n",
3692 __func__,
3693 NFS4_FS_LOCATION_MAXSERVERS,
3694 m, res->nlocations);
3695 for (i = loc->nservers; i < m; i++) {
3696 unsigned int len;
3697 char *data;
3698 status = decode_opaque_inline(xdr, &len, &data);
3699 if (unlikely(status != 0))
3700 goto out_eio;
3701 }
3702 break;
3703 }
3704 server = &loc->servers[loc->nservers];
3705 status = decode_opaque_inline(xdr, &server->len, &server->data);
3706 if (unlikely(status != 0))
3707 goto out_eio;
3708 dprintk("%s ", server->data);
3709 }
3710 status = decode_pathname(xdr, &loc->rootpath);
3711 if (unlikely(status != 0))
3712 goto out_eio;
3713 }
3714 if (res->nlocations != 0)
3715 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3716 out:
3717 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3718 return status;
3719 out_overflow:
3720 print_overflow_msg(__func__, xdr);
3721 out_eio:
3722 status = -EIO;
3723 goto out;
3724 }
3725
3726 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3727 {
3728 __be32 *p;
3729 int status = 0;
3730
3731 *res = 0;
3732 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3733 return -EIO;
3734 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3735 p = xdr_inline_decode(xdr, 8);
3736 if (unlikely(!p))
3737 goto out_overflow;
3738 xdr_decode_hyper(p, res);
3739 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3740 }
3741 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3742 return status;
3743 out_overflow:
3744 print_overflow_msg(__func__, xdr);
3745 return -EIO;
3746 }
3747
3748 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3749 {
3750 __be32 *p;
3751 int status = 0;
3752
3753 *maxlink = 1;
3754 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3755 return -EIO;
3756 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3757 p = xdr_inline_decode(xdr, 4);
3758 if (unlikely(!p))
3759 goto out_overflow;
3760 *maxlink = be32_to_cpup(p);
3761 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3762 }
3763 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3764 return status;
3765 out_overflow:
3766 print_overflow_msg(__func__, xdr);
3767 return -EIO;
3768 }
3769
3770 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3771 {
3772 __be32 *p;
3773 int status = 0;
3774
3775 *maxname = 1024;
3776 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3777 return -EIO;
3778 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3779 p = xdr_inline_decode(xdr, 4);
3780 if (unlikely(!p))
3781 goto out_overflow;
3782 *maxname = be32_to_cpup(p);
3783 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3784 }
3785 dprintk("%s: maxname=%u\n", __func__, *maxname);
3786 return status;
3787 out_overflow:
3788 print_overflow_msg(__func__, xdr);
3789 return -EIO;
3790 }
3791
3792 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3793 {
3794 __be32 *p;
3795 int status = 0;
3796
3797 *res = 1024;
3798 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3799 return -EIO;
3800 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3801 uint64_t maxread;
3802 p = xdr_inline_decode(xdr, 8);
3803 if (unlikely(!p))
3804 goto out_overflow;
3805 xdr_decode_hyper(p, &maxread);
3806 if (maxread > 0x7FFFFFFF)
3807 maxread = 0x7FFFFFFF;
3808 *res = (uint32_t)maxread;
3809 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3810 }
3811 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3812 return status;
3813 out_overflow:
3814 print_overflow_msg(__func__, xdr);
3815 return -EIO;
3816 }
3817
3818 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3819 {
3820 __be32 *p;
3821 int status = 0;
3822
3823 *res = 1024;
3824 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3825 return -EIO;
3826 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3827 uint64_t maxwrite;
3828 p = xdr_inline_decode(xdr, 8);
3829 if (unlikely(!p))
3830 goto out_overflow;
3831 xdr_decode_hyper(p, &maxwrite);
3832 if (maxwrite > 0x7FFFFFFF)
3833 maxwrite = 0x7FFFFFFF;
3834 *res = (uint32_t)maxwrite;
3835 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3836 }
3837 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3838 return status;
3839 out_overflow:
3840 print_overflow_msg(__func__, xdr);
3841 return -EIO;
3842 }
3843
3844 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3845 {
3846 uint32_t tmp;
3847 __be32 *p;
3848 int ret = 0;
3849
3850 *mode = 0;
3851 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3852 return -EIO;
3853 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3854 p = xdr_inline_decode(xdr, 4);
3855 if (unlikely(!p))
3856 goto out_overflow;
3857 tmp = be32_to_cpup(p);
3858 *mode = tmp & ~S_IFMT;
3859 bitmap[1] &= ~FATTR4_WORD1_MODE;
3860 ret = NFS_ATTR_FATTR_MODE;
3861 }
3862 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3863 return ret;
3864 out_overflow:
3865 print_overflow_msg(__func__, xdr);
3866 return -EIO;
3867 }
3868
3869 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3870 {
3871 __be32 *p;
3872 int ret = 0;
3873
3874 *nlink = 1;
3875 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3876 return -EIO;
3877 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3878 p = xdr_inline_decode(xdr, 4);
3879 if (unlikely(!p))
3880 goto out_overflow;
3881 *nlink = be32_to_cpup(p);
3882 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3883 ret = NFS_ATTR_FATTR_NLINK;
3884 }
3885 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3886 return ret;
3887 out_overflow:
3888 print_overflow_msg(__func__, xdr);
3889 return -EIO;
3890 }
3891
3892 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3893 const struct nfs_server *server, kuid_t *uid,
3894 struct nfs4_string *owner_name)
3895 {
3896 uint32_t len;
3897 __be32 *p;
3898 int ret = 0;
3899
3900 *uid = make_kuid(&init_user_ns, -2);
3901 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3902 return -EIO;
3903 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3904 p = xdr_inline_decode(xdr, 4);
3905 if (unlikely(!p))
3906 goto out_overflow;
3907 len = be32_to_cpup(p);
3908 p = xdr_inline_decode(xdr, len);
3909 if (unlikely(!p))
3910 goto out_overflow;
3911 if (owner_name != NULL) {
3912 owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3913 if (owner_name->data != NULL) {
3914 owner_name->len = len;
3915 ret = NFS_ATTR_FATTR_OWNER_NAME;
3916 }
3917 } else if (len < XDR_MAX_NETOBJ) {
3918 if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3919 ret = NFS_ATTR_FATTR_OWNER;
3920 else
3921 dprintk("%s: nfs_map_name_to_uid failed!\n",
3922 __func__);
3923 } else
3924 dprintk("%s: name too long (%u)!\n",
3925 __func__, len);
3926 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3927 }
3928 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3929 return ret;
3930 out_overflow:
3931 print_overflow_msg(__func__, xdr);
3932 return -EIO;
3933 }
3934
3935 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3936 const struct nfs_server *server, kgid_t *gid,
3937 struct nfs4_string *group_name)
3938 {
3939 uint32_t len;
3940 __be32 *p;
3941 int ret = 0;
3942
3943 *gid = make_kgid(&init_user_ns, -2);
3944 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3945 return -EIO;
3946 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3947 p = xdr_inline_decode(xdr, 4);
3948 if (unlikely(!p))
3949 goto out_overflow;
3950 len = be32_to_cpup(p);
3951 p = xdr_inline_decode(xdr, len);
3952 if (unlikely(!p))
3953 goto out_overflow;
3954 if (group_name != NULL) {
3955 group_name->data = kmemdup(p, len, GFP_NOWAIT);
3956 if (group_name->data != NULL) {
3957 group_name->len = len;
3958 ret = NFS_ATTR_FATTR_GROUP_NAME;
3959 }
3960 } else if (len < XDR_MAX_NETOBJ) {
3961 if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3962 ret = NFS_ATTR_FATTR_GROUP;
3963 else
3964 dprintk("%s: nfs_map_group_to_gid failed!\n",
3965 __func__);
3966 } else
3967 dprintk("%s: name too long (%u)!\n",
3968 __func__, len);
3969 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3970 }
3971 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3972 return ret;
3973 out_overflow:
3974 print_overflow_msg(__func__, xdr);
3975 return -EIO;
3976 }
3977
3978 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3979 {
3980 uint32_t major = 0, minor = 0;
3981 __be32 *p;
3982 int ret = 0;
3983
3984 *rdev = MKDEV(0,0);
3985 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3986 return -EIO;
3987 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3988 dev_t tmp;
3989
3990 p = xdr_inline_decode(xdr, 8);
3991 if (unlikely(!p))
3992 goto out_overflow;
3993 major = be32_to_cpup(p++);
3994 minor = be32_to_cpup(p);
3995 tmp = MKDEV(major, minor);
3996 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3997 *rdev = tmp;
3998 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3999 ret = NFS_ATTR_FATTR_RDEV;
4000 }
4001 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
4002 return ret;
4003 out_overflow:
4004 print_overflow_msg(__func__, xdr);
4005 return -EIO;
4006 }
4007
4008 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4009 {
4010 __be32 *p;
4011 int status = 0;
4012
4013 *res = 0;
4014 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
4015 return -EIO;
4016 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4017 p = xdr_inline_decode(xdr, 8);
4018 if (unlikely(!p))
4019 goto out_overflow;
4020 xdr_decode_hyper(p, res);
4021 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4022 }
4023 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4024 return status;
4025 out_overflow:
4026 print_overflow_msg(__func__, xdr);
4027 return -EIO;
4028 }
4029
4030 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4031 {
4032 __be32 *p;
4033 int status = 0;
4034
4035 *res = 0;
4036 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4037 return -EIO;
4038 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4039 p = xdr_inline_decode(xdr, 8);
4040 if (unlikely(!p))
4041 goto out_overflow;
4042 xdr_decode_hyper(p, res);
4043 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4044 }
4045 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4046 return status;
4047 out_overflow:
4048 print_overflow_msg(__func__, xdr);
4049 return -EIO;
4050 }
4051
4052 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4053 {
4054 __be32 *p;
4055 int status = 0;
4056
4057 *res = 0;
4058 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4059 return -EIO;
4060 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4061 p = xdr_inline_decode(xdr, 8);
4062 if (unlikely(!p))
4063 goto out_overflow;
4064 xdr_decode_hyper(p, res);
4065 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4066 }
4067 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4068 return status;
4069 out_overflow:
4070 print_overflow_msg(__func__, xdr);
4071 return -EIO;
4072 }
4073
4074 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4075 {
4076 __be32 *p;
4077 int ret = 0;
4078
4079 *used = 0;
4080 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4081 return -EIO;
4082 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4083 p = xdr_inline_decode(xdr, 8);
4084 if (unlikely(!p))
4085 goto out_overflow;
4086 xdr_decode_hyper(p, used);
4087 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4088 ret = NFS_ATTR_FATTR_SPACE_USED;
4089 }
4090 dprintk("%s: space used=%Lu\n", __func__,
4091 (unsigned long long)*used);
4092 return ret;
4093 out_overflow:
4094 print_overflow_msg(__func__, xdr);
4095 return -EIO;
4096 }
4097
4098 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4099 {
4100 __be32 *p;
4101 uint64_t sec;
4102 uint32_t nsec;
4103
4104 p = xdr_inline_decode(xdr, 12);
4105 if (unlikely(!p))
4106 goto out_overflow;
4107 p = xdr_decode_hyper(p, &sec);
4108 nsec = be32_to_cpup(p);
4109 time->tv_sec = (time_t)sec;
4110 time->tv_nsec = (long)nsec;
4111 return 0;
4112 out_overflow:
4113 print_overflow_msg(__func__, xdr);
4114 return -EIO;
4115 }
4116
4117 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4118 {
4119 int status = 0;
4120
4121 time->tv_sec = 0;
4122 time->tv_nsec = 0;
4123 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4124 return -EIO;
4125 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4126 status = decode_attr_time(xdr, time);
4127 if (status == 0)
4128 status = NFS_ATTR_FATTR_ATIME;
4129 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4130 }
4131 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4132 return status;
4133 }
4134
4135 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4136 {
4137 int status = 0;
4138
4139 time->tv_sec = 0;
4140 time->tv_nsec = 0;
4141 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4142 return -EIO;
4143 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4144 status = decode_attr_time(xdr, time);
4145 if (status == 0)
4146 status = NFS_ATTR_FATTR_CTIME;
4147 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4148 }
4149 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4150 return status;
4151 }
4152
4153 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4154 struct timespec *time)
4155 {
4156 int status = 0;
4157
4158 time->tv_sec = 0;
4159 time->tv_nsec = 0;
4160 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4161 return -EIO;
4162 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4163 status = decode_attr_time(xdr, time);
4164 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4165 }
4166 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4167 (long)time->tv_nsec);
4168 return status;
4169 }
4170
4171 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4172 struct nfs4_label *label)
4173 {
4174 uint32_t pi = 0;
4175 uint32_t lfs = 0;
4176 __u32 len;
4177 __be32 *p;
4178 int status = 0;
4179
4180 if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4181 return -EIO;
4182 if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4183 p = xdr_inline_decode(xdr, 4);
4184 if (unlikely(!p))
4185 goto out_overflow;
4186 lfs = be32_to_cpup(p++);
4187 p = xdr_inline_decode(xdr, 4);
4188 if (unlikely(!p))
4189 goto out_overflow;
4190 pi = be32_to_cpup(p++);
4191 p = xdr_inline_decode(xdr, 4);
4192 if (unlikely(!p))
4193 goto out_overflow;
4194 len = be32_to_cpup(p++);
4195 p = xdr_inline_decode(xdr, len);
4196 if (unlikely(!p))
4197 goto out_overflow;
4198 if (len < NFS4_MAXLABELLEN) {
4199 if (label) {
4200 memcpy(label->label, p, len);
4201 label->len = len;
4202 label->pi = pi;
4203 label->lfs = lfs;
4204 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4205 }
4206 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4207 } else
4208 printk(KERN_WARNING "%s: label too long (%u)!\n",
4209 __func__, len);
4210 }
4211 if (label && label->label)
4212 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4213 (char *)label->label, label->len, label->pi, label->lfs);
4214 return status;
4215
4216 out_overflow:
4217 print_overflow_msg(__func__, xdr);
4218 return -EIO;
4219 }
4220
4221 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4222 {
4223 int status = 0;
4224
4225 time->tv_sec = 0;
4226 time->tv_nsec = 0;
4227 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4228 return -EIO;
4229 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4230 status = decode_attr_time(xdr, time);
4231 if (status == 0)
4232 status = NFS_ATTR_FATTR_MTIME;
4233 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4234 }
4235 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4236 return status;
4237 }
4238
4239 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4240 {
4241 unsigned int attrwords = XDR_QUADLEN(attrlen);
4242 unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4243
4244 if (unlikely(attrwords != nwords)) {
4245 dprintk("%s: server returned incorrect attribute length: "
4246 "%u %c %u\n",
4247 __func__,
4248 attrwords << 2,
4249 (attrwords < nwords) ? '<' : '>',
4250 nwords << 2);
4251 return -EIO;
4252 }
4253 return 0;
4254 }
4255
4256 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4257 {
4258 __be32 *p;
4259
4260 p = xdr_inline_decode(xdr, 20);
4261 if (unlikely(!p))
4262 goto out_overflow;
4263 cinfo->atomic = be32_to_cpup(p++);
4264 p = xdr_decode_hyper(p, &cinfo->before);
4265 xdr_decode_hyper(p, &cinfo->after);
4266 return 0;
4267 out_overflow:
4268 print_overflow_msg(__func__, xdr);
4269 return -EIO;
4270 }
4271
4272 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4273 {
4274 __be32 *p;
4275 uint32_t supp, acc;
4276 int status;
4277
4278 status = decode_op_hdr(xdr, OP_ACCESS);
4279 if (status)
4280 return status;
4281 p = xdr_inline_decode(xdr, 8);
4282 if (unlikely(!p))
4283 goto out_overflow;
4284 supp = be32_to_cpup(p++);
4285 acc = be32_to_cpup(p);
4286 *supported = supp;
4287 *access = acc;
4288 return 0;
4289 out_overflow:
4290 print_overflow_msg(__func__, xdr);
4291 return -EIO;
4292 }
4293
4294 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4295 {
4296 __be32 *p;
4297
4298 p = xdr_inline_decode(xdr, len);
4299 if (likely(p)) {
4300 memcpy(buf, p, len);
4301 return 0;
4302 }
4303 print_overflow_msg(__func__, xdr);
4304 return -EIO;
4305 }
4306
4307 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4308 {
4309 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4310 }
4311
4312 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4313 {
4314 stateid->type = NFS4_OPEN_STATEID_TYPE;
4315 return decode_stateid(xdr, stateid);
4316 }
4317
4318 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4319 {
4320 stateid->type = NFS4_LOCK_STATEID_TYPE;
4321 return decode_stateid(xdr, stateid);
4322 }
4323
4324 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4325 {
4326 stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4327 return decode_stateid(xdr, stateid);
4328 }
4329
4330 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4331 {
4332 int status;
4333
4334 status = decode_op_hdr(xdr, OP_CLOSE);
4335 if (status != -EIO)
4336 nfs_increment_open_seqid(status, res->seqid);
4337 if (!status)
4338 status = decode_open_stateid(xdr, &res->stateid);
4339 return status;
4340 }
4341
4342 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4343 {
4344 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4345 }
4346
4347 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4348 {
4349 return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4350 }
4351
4352 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4353 {
4354 int status;
4355
4356 status = decode_op_hdr(xdr, OP_COMMIT);
4357 if (!status)
4358 status = decode_write_verifier(xdr, &res->verf->verifier);
4359 return status;
4360 }
4361
4362 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4363 {
4364 __be32 *p;
4365 uint32_t bmlen;
4366 int status;
4367
4368 status = decode_op_hdr(xdr, OP_CREATE);
4369 if (status)
4370 return status;
4371 if ((status = decode_change_info(xdr, cinfo)))
4372 return status;
4373 p = xdr_inline_decode(xdr, 4);
4374 if (unlikely(!p))
4375 goto out_overflow;
4376 bmlen = be32_to_cpup(p);
4377 p = xdr_inline_decode(xdr, bmlen << 2);
4378 if (likely(p))
4379 return 0;
4380 out_overflow:
4381 print_overflow_msg(__func__, xdr);
4382 return -EIO;
4383 }
4384
4385 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4386 {
4387 unsigned int savep;
4388 uint32_t attrlen, bitmap[3] = {0};
4389 int status;
4390
4391 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4392 goto xdr_error;
4393 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4394 goto xdr_error;
4395 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4396 goto xdr_error;
4397 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4398 goto xdr_error;
4399 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4400 &res->fh_expire_type)) != 0)
4401 goto xdr_error;
4402 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4403 goto xdr_error;
4404 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4405 goto xdr_error;
4406 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4407 goto xdr_error;
4408 if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4409 res->exclcreat_bitmask)) != 0)
4410 goto xdr_error;
4411 status = verify_attr_len(xdr, savep, attrlen);
4412 xdr_error:
4413 dprintk("%s: xdr returned %d!\n", __func__, -status);
4414 return status;
4415 }
4416
4417 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4418 {
4419 unsigned int savep;
4420 uint32_t attrlen, bitmap[3] = {0};
4421 int status;
4422
4423 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4424 goto xdr_error;
4425 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4426 goto xdr_error;
4427 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4428 goto xdr_error;
4429
4430 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4431 goto xdr_error;
4432 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4433 goto xdr_error;
4434 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4435 goto xdr_error;
4436
4437 status = -EIO;
4438 if (unlikely(bitmap[0]))
4439 goto xdr_error;
4440
4441 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4442 goto xdr_error;
4443 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4444 goto xdr_error;
4445 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4446 goto xdr_error;
4447
4448 status = verify_attr_len(xdr, savep, attrlen);
4449 xdr_error:
4450 dprintk("%s: xdr returned %d!\n", __func__, -status);
4451 return status;
4452 }
4453
4454 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4455 {
4456 unsigned int savep;
4457 uint32_t attrlen, bitmap[3] = {0};
4458 int status;
4459
4460 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4461 goto xdr_error;
4462 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4463 goto xdr_error;
4464 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4465 goto xdr_error;
4466
4467 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4468 goto xdr_error;
4469 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4470 goto xdr_error;
4471
4472 status = verify_attr_len(xdr, savep, attrlen);
4473 xdr_error:
4474 dprintk("%s: xdr returned %d!\n", __func__, -status);
4475 return status;
4476 }
4477
4478 static int decode_threshold_hint(struct xdr_stream *xdr,
4479 uint32_t *bitmap,
4480 uint64_t *res,
4481 uint32_t hint_bit)
4482 {
4483 __be32 *p;
4484
4485 *res = 0;
4486 if (likely(bitmap[0] & hint_bit)) {
4487 p = xdr_inline_decode(xdr, 8);
4488 if (unlikely(!p))
4489 goto out_overflow;
4490 xdr_decode_hyper(p, res);
4491 }
4492 return 0;
4493 out_overflow:
4494 print_overflow_msg(__func__, xdr);
4495 return -EIO;
4496 }
4497
4498 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4499 struct nfs4_threshold *res)
4500 {
4501 __be32 *p;
4502 unsigned int savep;
4503 uint32_t bitmap[3] = {0,}, attrlen;
4504 int status;
4505
4506 /* layout type */
4507 p = xdr_inline_decode(xdr, 4);
4508 if (unlikely(!p)) {
4509 print_overflow_msg(__func__, xdr);
4510 return -EIO;
4511 }
4512 res->l_type = be32_to_cpup(p);
4513
4514 /* thi_hintset bitmap */
4515 status = decode_attr_bitmap(xdr, bitmap);
4516 if (status < 0)
4517 goto xdr_error;
4518
4519 /* thi_hintlist length */
4520 status = decode_attr_length(xdr, &attrlen, &savep);
4521 if (status < 0)
4522 goto xdr_error;
4523 /* thi_hintlist */
4524 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4525 if (status < 0)
4526 goto xdr_error;
4527 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4528 if (status < 0)
4529 goto xdr_error;
4530 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4531 THRESHOLD_RD_IO);
4532 if (status < 0)
4533 goto xdr_error;
4534 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4535 THRESHOLD_WR_IO);
4536 if (status < 0)
4537 goto xdr_error;
4538
4539 status = verify_attr_len(xdr, savep, attrlen);
4540 res->bm = bitmap[0];
4541
4542 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4543 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4544 res->wr_io_sz);
4545 xdr_error:
4546 dprintk("%s ret=%d!\n", __func__, status);
4547 return status;
4548 }
4549
4550 /*
4551 * Thresholds on pNFS direct I/O vrs MDS I/O
4552 */
4553 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4554 uint32_t *bitmap,
4555 struct nfs4_threshold *res)
4556 {
4557 __be32 *p;
4558 int status = 0;
4559 uint32_t num;
4560
4561 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4562 return -EIO;
4563 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4564 /* Did the server return an unrequested attribute? */
4565 if (unlikely(res == NULL))
4566 return -EREMOTEIO;
4567 p = xdr_inline_decode(xdr, 4);
4568 if (unlikely(!p))
4569 goto out_overflow;
4570 num = be32_to_cpup(p);
4571 if (num == 0)
4572 return 0;
4573 if (num > 1)
4574 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4575 "drivers per filesystem not supported\n",
4576 __func__);
4577
4578 status = decode_first_threshold_item4(xdr, res);
4579 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4580 }
4581 return status;
4582 out_overflow:
4583 print_overflow_msg(__func__, xdr);
4584 return -EIO;
4585 }
4586
4587 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4588 struct nfs_fattr *fattr, struct nfs_fh *fh,
4589 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4590 const struct nfs_server *server)
4591 {
4592 int status;
4593 umode_t fmode = 0;
4594 uint32_t type;
4595 int32_t err;
4596
4597 status = decode_attr_type(xdr, bitmap, &type);
4598 if (status < 0)
4599 goto xdr_error;
4600 fattr->mode = 0;
4601 if (status != 0) {
4602 fattr->mode |= nfs_type2fmt[type];
4603 fattr->valid |= status;
4604 }
4605
4606 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4607 if (status < 0)
4608 goto xdr_error;
4609 fattr->valid |= status;
4610
4611 status = decode_attr_size(xdr, bitmap, &fattr->size);
4612 if (status < 0)
4613 goto xdr_error;
4614 fattr->valid |= status;
4615
4616 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4617 if (status < 0)
4618 goto xdr_error;
4619 fattr->valid |= status;
4620
4621 err = 0;
4622 status = decode_attr_error(xdr, bitmap, &err);
4623 if (status < 0)
4624 goto xdr_error;
4625
4626 status = decode_attr_filehandle(xdr, bitmap, fh);
4627 if (status < 0)
4628 goto xdr_error;
4629
4630 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4631 if (status < 0)
4632 goto xdr_error;
4633 fattr->valid |= status;
4634
4635 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4636 if (status < 0)
4637 goto xdr_error;
4638 fattr->valid |= status;
4639
4640 status = -EIO;
4641 if (unlikely(bitmap[0]))
4642 goto xdr_error;
4643
4644 status = decode_attr_mode(xdr, bitmap, &fmode);
4645 if (status < 0)
4646 goto xdr_error;
4647 if (status != 0) {
4648 fattr->mode |= fmode;
4649 fattr->valid |= status;
4650 }
4651
4652 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4653 if (status < 0)
4654 goto xdr_error;
4655 fattr->valid |= status;
4656
4657 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4658 if (status < 0)
4659 goto xdr_error;
4660 fattr->valid |= status;
4661
4662 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4663 if (status < 0)
4664 goto xdr_error;
4665 fattr->valid |= status;
4666
4667 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4668 if (status < 0)
4669 goto xdr_error;
4670 fattr->valid |= status;
4671
4672 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4673 if (status < 0)
4674 goto xdr_error;
4675 fattr->valid |= status;
4676
4677 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4678 if (status < 0)
4679 goto xdr_error;
4680 fattr->valid |= status;
4681
4682 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4683 if (status < 0)
4684 goto xdr_error;
4685 fattr->valid |= status;
4686
4687 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4688 if (status < 0)
4689 goto xdr_error;
4690 fattr->valid |= status;
4691
4692 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4693 if (status < 0)
4694 goto xdr_error;
4695 fattr->valid |= status;
4696
4697 status = -EIO;
4698 if (unlikely(bitmap[1]))
4699 goto xdr_error;
4700
4701 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4702 if (status < 0)
4703 goto xdr_error;
4704
4705 if (label) {
4706 status = decode_attr_security_label(xdr, bitmap, label);
4707 if (status < 0)
4708 goto xdr_error;
4709 fattr->valid |= status;
4710 }
4711
4712 xdr_error:
4713 dprintk("%s: xdr returned %d\n", __func__, -status);
4714 return status;
4715 }
4716
4717 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4718 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4719 struct nfs4_label *label, const struct nfs_server *server)
4720 {
4721 unsigned int savep;
4722 uint32_t attrlen,
4723 bitmap[3] = {0};
4724 int status;
4725
4726 status = decode_op_hdr(xdr, OP_GETATTR);
4727 if (status < 0)
4728 goto xdr_error;
4729
4730 status = decode_attr_bitmap(xdr, bitmap);
4731 if (status < 0)
4732 goto xdr_error;
4733
4734 status = decode_attr_length(xdr, &attrlen, &savep);
4735 if (status < 0)
4736 goto xdr_error;
4737
4738 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4739 label, server);
4740 if (status < 0)
4741 goto xdr_error;
4742
4743 status = verify_attr_len(xdr, savep, attrlen);
4744 xdr_error:
4745 dprintk("%s: xdr returned %d\n", __func__, -status);
4746 return status;
4747 }
4748
4749 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4750 struct nfs4_label *label, const struct nfs_server *server)
4751 {
4752 return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4753 }
4754
4755 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4756 const struct nfs_server *server)
4757 {
4758 return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4759 }
4760
4761 /*
4762 * Decode potentially multiple layout types.
4763 */
4764 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4765 struct nfs_fsinfo *fsinfo)
4766 {
4767 __be32 *p;
4768 uint32_t i;
4769
4770 p = xdr_inline_decode(xdr, 4);
4771 if (unlikely(!p))
4772 goto out_overflow;
4773 fsinfo->nlayouttypes = be32_to_cpup(p);
4774
4775 /* pNFS is not supported by the underlying file system */
4776 if (fsinfo->nlayouttypes == 0)
4777 return 0;
4778
4779 /* Decode and set first layout type, move xdr->p past unused types */
4780 p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4781 if (unlikely(!p))
4782 goto out_overflow;
4783
4784 /* If we get too many, then just cap it at the max */
4785 if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4786 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4787 __func__, fsinfo->nlayouttypes);
4788 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4789 }
4790
4791 for(i = 0; i < fsinfo->nlayouttypes; ++i)
4792 fsinfo->layouttype[i] = be32_to_cpup(p++);
4793 return 0;
4794 out_overflow:
4795 print_overflow_msg(__func__, xdr);
4796 return -EIO;
4797 }
4798
4799 /*
4800 * The type of file system exported.
4801 * Note we must ensure that layouttype is set in any non-error case.
4802 */
4803 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4804 struct nfs_fsinfo *fsinfo)
4805 {
4806 int status = 0;
4807
4808 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4809 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4810 return -EIO;
4811 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4812 status = decode_pnfs_layout_types(xdr, fsinfo);
4813 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4814 }
4815 return status;
4816 }
4817
4818 /*
4819 * The prefered block size for layout directed io
4820 */
4821 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4822 uint32_t *res)
4823 {
4824 __be32 *p;
4825
4826 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4827 *res = 0;
4828 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4829 p = xdr_inline_decode(xdr, 4);
4830 if (unlikely(!p)) {
4831 print_overflow_msg(__func__, xdr);
4832 return -EIO;
4833 }
4834 *res = be32_to_cpup(p);
4835 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4836 }
4837 return 0;
4838 }
4839
4840 /*
4841 * The granularity of a CLONE operation.
4842 */
4843 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4844 uint32_t *res)
4845 {
4846 __be32 *p;
4847
4848 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4849 *res = 0;
4850 if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4851 p = xdr_inline_decode(xdr, 4);
4852 if (unlikely(!p)) {
4853 print_overflow_msg(__func__, xdr);
4854 return -EIO;
4855 }
4856 *res = be32_to_cpup(p);
4857 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4858 }
4859 return 0;
4860 }
4861
4862 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4863 {
4864 unsigned int savep;
4865 uint32_t attrlen, bitmap[3];
4866 int status;
4867
4868 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4869 goto xdr_error;
4870 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4871 goto xdr_error;
4872 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4873 goto xdr_error;
4874
4875 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4876
4877 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4878 goto xdr_error;
4879 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4880 goto xdr_error;
4881 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4882 goto xdr_error;
4883 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4884 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4885 goto xdr_error;
4886 fsinfo->wtpref = fsinfo->wtmax;
4887
4888 status = -EIO;
4889 if (unlikely(bitmap[0]))
4890 goto xdr_error;
4891
4892 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4893 if (status != 0)
4894 goto xdr_error;
4895 status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4896 if (status != 0)
4897 goto xdr_error;
4898
4899 status = -EIO;
4900 if (unlikely(bitmap[1]))
4901 goto xdr_error;
4902
4903 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4904 if (status)
4905 goto xdr_error;
4906 status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4907 if (status)
4908 goto xdr_error;
4909
4910 status = verify_attr_len(xdr, savep, attrlen);
4911 xdr_error:
4912 dprintk("%s: xdr returned %d!\n", __func__, -status);
4913 return status;
4914 }
4915
4916 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4917 {
4918 __be32 *p;
4919 uint32_t len;
4920 int status;
4921
4922 /* Zero handle first to allow comparisons */
4923 memset(fh, 0, sizeof(*fh));
4924
4925 status = decode_op_hdr(xdr, OP_GETFH);
4926 if (status)
4927 return status;
4928
4929 p = xdr_inline_decode(xdr, 4);
4930 if (unlikely(!p))
4931 goto out_overflow;
4932 len = be32_to_cpup(p);
4933 if (len > NFS4_FHSIZE)
4934 return -EIO;
4935 fh->size = len;
4936 p = xdr_inline_decode(xdr, len);
4937 if (unlikely(!p))
4938 goto out_overflow;
4939 memcpy(fh->data, p, len);
4940 return 0;
4941 out_overflow:
4942 print_overflow_msg(__func__, xdr);
4943 return -EIO;
4944 }
4945
4946 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4947 {
4948 int status;
4949
4950 status = decode_op_hdr(xdr, OP_LINK);
4951 if (status)
4952 return status;
4953 return decode_change_info(xdr, cinfo);
4954 }
4955
4956 /*
4957 * We create the owner, so we know a proper owner.id length is 4.
4958 */
4959 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4960 {
4961 uint64_t offset, length, clientid;
4962 __be32 *p;
4963 uint32_t namelen, type;
4964
4965 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4966 if (unlikely(!p))
4967 goto out_overflow;
4968 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4969 p = xdr_decode_hyper(p, &length);
4970 type = be32_to_cpup(p++); /* 4 byte read */
4971 if (fl != NULL) { /* manipulate file lock */
4972 fl->fl_start = (loff_t)offset;
4973 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4974 if (length == ~(uint64_t)0)
4975 fl->fl_end = OFFSET_MAX;
4976 fl->fl_type = F_WRLCK;
4977 if (type & 1)
4978 fl->fl_type = F_RDLCK;
4979 fl->fl_pid = 0;
4980 }
4981 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4982 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4983 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4984 if (likely(p))
4985 return -NFS4ERR_DENIED;
4986 out_overflow:
4987 print_overflow_msg(__func__, xdr);
4988 return -EIO;
4989 }
4990
4991 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4992 {
4993 int status;
4994
4995 status = decode_op_hdr(xdr, OP_LOCK);
4996 if (status == -EIO)
4997 goto out;
4998 if (status == 0) {
4999 status = decode_lock_stateid(xdr, &res->stateid);
5000 if (unlikely(status))
5001 goto out;
5002 } else if (status == -NFS4ERR_DENIED)
5003 status = decode_lock_denied(xdr, NULL);
5004 if (res->open_seqid != NULL)
5005 nfs_increment_open_seqid(status, res->open_seqid);
5006 nfs_increment_lock_seqid(status, res->lock_seqid);
5007 out:
5008 return status;
5009 }
5010
5011 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
5012 {
5013 int status;
5014 status = decode_op_hdr(xdr, OP_LOCKT);
5015 if (status == -NFS4ERR_DENIED)
5016 return decode_lock_denied(xdr, res->denied);
5017 return status;
5018 }
5019
5020 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
5021 {
5022 int status;
5023
5024 status = decode_op_hdr(xdr, OP_LOCKU);
5025 if (status != -EIO)
5026 nfs_increment_lock_seqid(status, res->seqid);
5027 if (status == 0)
5028 status = decode_lock_stateid(xdr, &res->stateid);
5029 return status;
5030 }
5031
5032 static int decode_release_lockowner(struct xdr_stream *xdr)
5033 {
5034 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5035 }
5036
5037 static int decode_lookup(struct xdr_stream *xdr)
5038 {
5039 return decode_op_hdr(xdr, OP_LOOKUP);
5040 }
5041
5042 /* This is too sick! */
5043 static int decode_space_limit(struct xdr_stream *xdr,
5044 unsigned long *pagemod_limit)
5045 {
5046 __be32 *p;
5047 uint32_t limit_type, nblocks, blocksize;
5048 u64 maxsize = 0;
5049
5050 p = xdr_inline_decode(xdr, 12);
5051 if (unlikely(!p))
5052 goto out_overflow;
5053 limit_type = be32_to_cpup(p++);
5054 switch (limit_type) {
5055 case NFS4_LIMIT_SIZE:
5056 xdr_decode_hyper(p, &maxsize);
5057 break;
5058 case NFS4_LIMIT_BLOCKS:
5059 nblocks = be32_to_cpup(p++);
5060 blocksize = be32_to_cpup(p);
5061 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5062 }
5063 maxsize >>= PAGE_SHIFT;
5064 *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5065 return 0;
5066 out_overflow:
5067 print_overflow_msg(__func__, xdr);
5068 return -EIO;
5069 }
5070
5071 static int decode_rw_delegation(struct xdr_stream *xdr,
5072 uint32_t delegation_type,
5073 struct nfs_openres *res)
5074 {
5075 __be32 *p;
5076 int status;
5077
5078 status = decode_delegation_stateid(xdr, &res->delegation);
5079 if (unlikely(status))
5080 return status;
5081 p = xdr_inline_decode(xdr, 4);
5082 if (unlikely(!p))
5083 goto out_overflow;
5084 res->do_recall = be32_to_cpup(p);
5085
5086 switch (delegation_type) {
5087 case NFS4_OPEN_DELEGATE_READ:
5088 res->delegation_type = FMODE_READ;
5089 break;
5090 case NFS4_OPEN_DELEGATE_WRITE:
5091 res->delegation_type = FMODE_WRITE|FMODE_READ;
5092 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5093 return -EIO;
5094 }
5095 return decode_ace(xdr, NULL, res->server->nfs_client);
5096 out_overflow:
5097 print_overflow_msg(__func__, xdr);
5098 return -EIO;
5099 }
5100
5101 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5102 {
5103 __be32 *p;
5104 uint32_t why_no_delegation;
5105
5106 p = xdr_inline_decode(xdr, 4);
5107 if (unlikely(!p))
5108 goto out_overflow;
5109 why_no_delegation = be32_to_cpup(p);
5110 switch (why_no_delegation) {
5111 case WND4_CONTENTION:
5112 case WND4_RESOURCE:
5113 xdr_inline_decode(xdr, 4);
5114 /* Ignore for now */
5115 }
5116 return 0;
5117 out_overflow:
5118 print_overflow_msg(__func__, xdr);
5119 return -EIO;
5120 }
5121
5122 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5123 {
5124 __be32 *p;
5125 uint32_t delegation_type;
5126
5127 p = xdr_inline_decode(xdr, 4);
5128 if (unlikely(!p))
5129 goto out_overflow;
5130 delegation_type = be32_to_cpup(p);
5131 res->delegation_type = 0;
5132 switch (delegation_type) {
5133 case NFS4_OPEN_DELEGATE_NONE:
5134 return 0;
5135 case NFS4_OPEN_DELEGATE_READ:
5136 case NFS4_OPEN_DELEGATE_WRITE:
5137 return decode_rw_delegation(xdr, delegation_type, res);
5138 case NFS4_OPEN_DELEGATE_NONE_EXT:
5139 return decode_no_delegation(xdr, res);
5140 }
5141 return -EIO;
5142 out_overflow:
5143 print_overflow_msg(__func__, xdr);
5144 return -EIO;
5145 }
5146
5147 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5148 {
5149 __be32 *p;
5150 uint32_t savewords, bmlen, i;
5151 int status;
5152
5153 if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5154 return status;
5155 nfs_increment_open_seqid(status, res->seqid);
5156 if (status)
5157 return status;
5158 status = decode_open_stateid(xdr, &res->stateid);
5159 if (unlikely(status))
5160 return status;
5161
5162 decode_change_info(xdr, &res->cinfo);
5163
5164 p = xdr_inline_decode(xdr, 8);
5165 if (unlikely(!p))
5166 goto out_overflow;
5167 res->rflags = be32_to_cpup(p++);
5168 bmlen = be32_to_cpup(p);
5169 if (bmlen > 10)
5170 goto xdr_error;
5171
5172 p = xdr_inline_decode(xdr, bmlen << 2);
5173 if (unlikely(!p))
5174 goto out_overflow;
5175 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5176 for (i = 0; i < savewords; ++i)
5177 res->attrset[i] = be32_to_cpup(p++);
5178 for (; i < NFS4_BITMAP_SIZE; i++)
5179 res->attrset[i] = 0;
5180
5181 return decode_delegation(xdr, res);
5182 xdr_error:
5183 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5184 return -EIO;
5185 out_overflow:
5186 print_overflow_msg(__func__, xdr);
5187 return -EIO;
5188 }
5189
5190 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5191 {
5192 int status;
5193
5194 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5195 if (status != -EIO)
5196 nfs_increment_open_seqid(status, res->seqid);
5197 if (!status)
5198 status = decode_open_stateid(xdr, &res->stateid);
5199 return status;
5200 }
5201
5202 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5203 {
5204 int status;
5205
5206 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5207 if (status != -EIO)
5208 nfs_increment_open_seqid(status, res->seqid);
5209 if (!status)
5210 status = decode_open_stateid(xdr, &res->stateid);
5211 return status;
5212 }
5213
5214 static int decode_putfh(struct xdr_stream *xdr)
5215 {
5216 return decode_op_hdr(xdr, OP_PUTFH);
5217 }
5218
5219 static int decode_putrootfh(struct xdr_stream *xdr)
5220 {
5221 return decode_op_hdr(xdr, OP_PUTROOTFH);
5222 }
5223
5224 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5225 struct nfs_pgio_res *res)
5226 {
5227 __be32 *p;
5228 uint32_t count, eof, recvd;
5229 int status;
5230
5231 status = decode_op_hdr(xdr, OP_READ);
5232 if (status)
5233 return status;
5234 p = xdr_inline_decode(xdr, 8);
5235 if (unlikely(!p))
5236 goto out_overflow;
5237 eof = be32_to_cpup(p++);
5238 count = be32_to_cpup(p);
5239 recvd = xdr_read_pages(xdr, count);
5240 if (count > recvd) {
5241 dprintk("NFS: server cheating in read reply: "
5242 "count %u > recvd %u\n", count, recvd);
5243 count = recvd;
5244 eof = 0;
5245 }
5246 res->eof = eof;
5247 res->count = count;
5248 return 0;
5249 out_overflow:
5250 print_overflow_msg(__func__, xdr);
5251 return -EIO;
5252 }
5253
5254 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5255 {
5256 int status;
5257 __be32 verf[2];
5258
5259 status = decode_op_hdr(xdr, OP_READDIR);
5260 if (!status)
5261 status = decode_verifier(xdr, readdir->verifier.data);
5262 if (unlikely(status))
5263 return status;
5264 memcpy(verf, readdir->verifier.data, sizeof(verf));
5265 dprintk("%s: verifier = %08x:%08x\n",
5266 __func__, verf[0], verf[1]);
5267 return xdr_read_pages(xdr, xdr->buf->page_len);
5268 }
5269
5270 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5271 {
5272 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5273 u32 len, recvd;
5274 __be32 *p;
5275 int status;
5276
5277 status = decode_op_hdr(xdr, OP_READLINK);
5278 if (status)
5279 return status;
5280
5281 /* Convert length of symlink */
5282 p = xdr_inline_decode(xdr, 4);
5283 if (unlikely(!p))
5284 goto out_overflow;
5285 len = be32_to_cpup(p);
5286 if (len >= rcvbuf->page_len || len <= 0) {
5287 dprintk("nfs: server returned giant symlink!\n");
5288 return -ENAMETOOLONG;
5289 }
5290 recvd = xdr_read_pages(xdr, len);
5291 if (recvd < len) {
5292 dprintk("NFS: server cheating in readlink reply: "
5293 "count %u > recvd %u\n", len, recvd);
5294 return -EIO;
5295 }
5296 /*
5297 * The XDR encode routine has set things up so that
5298 * the link text will be copied directly into the
5299 * buffer. We just have to do overflow-checking,
5300 * and and null-terminate the text (the VFS expects
5301 * null-termination).
5302 */
5303 xdr_terminate_string(rcvbuf, len);
5304 return 0;
5305 out_overflow:
5306 print_overflow_msg(__func__, xdr);
5307 return -EIO;
5308 }
5309
5310 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5311 {
5312 int status;
5313
5314 status = decode_op_hdr(xdr, OP_REMOVE);
5315 if (status)
5316 goto out;
5317 status = decode_change_info(xdr, cinfo);
5318 out:
5319 return status;
5320 }
5321
5322 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5323 struct nfs4_change_info *new_cinfo)
5324 {
5325 int status;
5326
5327 status = decode_op_hdr(xdr, OP_RENAME);
5328 if (status)
5329 goto out;
5330 if ((status = decode_change_info(xdr, old_cinfo)))
5331 goto out;
5332 status = decode_change_info(xdr, new_cinfo);
5333 out:
5334 return status;
5335 }
5336
5337 static int decode_renew(struct xdr_stream *xdr)
5338 {
5339 return decode_op_hdr(xdr, OP_RENEW);
5340 }
5341
5342 static int
5343 decode_restorefh(struct xdr_stream *xdr)
5344 {
5345 return decode_op_hdr(xdr, OP_RESTOREFH);
5346 }
5347
5348 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5349 struct nfs_getaclres *res)
5350 {
5351 unsigned int savep;
5352 uint32_t attrlen,
5353 bitmap[3] = {0};
5354 int status;
5355 unsigned int pg_offset;
5356
5357 res->acl_len = 0;
5358 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5359 goto out;
5360
5361 xdr_enter_page(xdr, xdr->buf->page_len);
5362
5363 /* Calculate the offset of the page data */
5364 pg_offset = xdr->buf->head[0].iov_len;
5365
5366 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5367 goto out;
5368 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5369 goto out;
5370
5371 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5372 return -EIO;
5373 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5374
5375 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5376 * are stored with the acl data to handle the problem of
5377 * variable length bitmaps.*/
5378 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5379 res->acl_len = attrlen;
5380
5381 /* Check for receive buffer overflow */
5382 if (res->acl_len > (xdr->nwords << 2) ||
5383 res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5384 res->acl_flags |= NFS4_ACL_TRUNC;
5385 dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5386 attrlen, xdr->nwords << 2);
5387 }
5388 } else
5389 status = -EOPNOTSUPP;
5390
5391 out:
5392 return status;
5393 }
5394
5395 static int
5396 decode_savefh(struct xdr_stream *xdr)
5397 {
5398 return decode_op_hdr(xdr, OP_SAVEFH);
5399 }
5400
5401 static int decode_setattr(struct xdr_stream *xdr)
5402 {
5403 __be32 *p;
5404 uint32_t bmlen;
5405 int status;
5406
5407 status = decode_op_hdr(xdr, OP_SETATTR);
5408 if (status)
5409 return status;
5410 p = xdr_inline_decode(xdr, 4);
5411 if (unlikely(!p))
5412 goto out_overflow;
5413 bmlen = be32_to_cpup(p);
5414 p = xdr_inline_decode(xdr, bmlen << 2);
5415 if (likely(p))
5416 return 0;
5417 out_overflow:
5418 print_overflow_msg(__func__, xdr);
5419 return -EIO;
5420 }
5421
5422 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5423 {
5424 __be32 *p;
5425 uint32_t opnum;
5426 int32_t nfserr;
5427
5428 p = xdr_inline_decode(xdr, 8);
5429 if (unlikely(!p))
5430 goto out_overflow;
5431 opnum = be32_to_cpup(p++);
5432 if (opnum != OP_SETCLIENTID) {
5433 dprintk("nfs: decode_setclientid: Server returned operation"
5434 " %d\n", opnum);
5435 return -EIO;
5436 }
5437 nfserr = be32_to_cpup(p);
5438 if (nfserr == NFS_OK) {
5439 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5440 if (unlikely(!p))
5441 goto out_overflow;
5442 p = xdr_decode_hyper(p, &res->clientid);
5443 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5444 } else if (nfserr == NFSERR_CLID_INUSE) {
5445 uint32_t len;
5446
5447 /* skip netid string */
5448 p = xdr_inline_decode(xdr, 4);
5449 if (unlikely(!p))
5450 goto out_overflow;
5451 len = be32_to_cpup(p);
5452 p = xdr_inline_decode(xdr, len);
5453 if (unlikely(!p))
5454 goto out_overflow;
5455
5456 /* skip uaddr string */
5457 p = xdr_inline_decode(xdr, 4);
5458 if (unlikely(!p))
5459 goto out_overflow;
5460 len = be32_to_cpup(p);
5461 p = xdr_inline_decode(xdr, len);
5462 if (unlikely(!p))
5463 goto out_overflow;
5464 return -NFSERR_CLID_INUSE;
5465 } else
5466 return nfs4_stat_to_errno(nfserr);
5467
5468 return 0;
5469 out_overflow:
5470 print_overflow_msg(__func__, xdr);
5471 return -EIO;
5472 }
5473
5474 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5475 {
5476 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5477 }
5478
5479 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5480 {
5481 __be32 *p;
5482 int status;
5483
5484 status = decode_op_hdr(xdr, OP_WRITE);
5485 if (status)
5486 return status;
5487
5488 p = xdr_inline_decode(xdr, 8);
5489 if (unlikely(!p))
5490 goto out_overflow;
5491 res->count = be32_to_cpup(p++);
5492 res->verf->committed = be32_to_cpup(p++);
5493 return decode_write_verifier(xdr, &res->verf->verifier);
5494 out_overflow:
5495 print_overflow_msg(__func__, xdr);
5496 return -EIO;
5497 }
5498
5499 static int decode_delegreturn(struct xdr_stream *xdr)
5500 {
5501 return decode_op_hdr(xdr, OP_DELEGRETURN);
5502 }
5503
5504 static int decode_secinfo_gss(struct xdr_stream *xdr,
5505 struct nfs4_secinfo4 *flavor)
5506 {
5507 u32 oid_len;
5508 __be32 *p;
5509
5510 p = xdr_inline_decode(xdr, 4);
5511 if (unlikely(!p))
5512 goto out_overflow;
5513 oid_len = be32_to_cpup(p);
5514 if (oid_len > GSS_OID_MAX_LEN)
5515 goto out_err;
5516
5517 p = xdr_inline_decode(xdr, oid_len);
5518 if (unlikely(!p))
5519 goto out_overflow;
5520 memcpy(flavor->flavor_info.oid.data, p, oid_len);
5521 flavor->flavor_info.oid.len = oid_len;
5522
5523 p = xdr_inline_decode(xdr, 8);
5524 if (unlikely(!p))
5525 goto out_overflow;
5526 flavor->flavor_info.qop = be32_to_cpup(p++);
5527 flavor->flavor_info.service = be32_to_cpup(p);
5528
5529 return 0;
5530
5531 out_overflow:
5532 print_overflow_msg(__func__, xdr);
5533 return -EIO;
5534 out_err:
5535 return -EINVAL;
5536 }
5537
5538 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5539 {
5540 struct nfs4_secinfo4 *sec_flavor;
5541 unsigned int i, num_flavors;
5542 int status;
5543 __be32 *p;
5544
5545 p = xdr_inline_decode(xdr, 4);
5546 if (unlikely(!p))
5547 goto out_overflow;
5548
5549 res->flavors->num_flavors = 0;
5550 num_flavors = be32_to_cpup(p);
5551
5552 for (i = 0; i < num_flavors; i++) {
5553 sec_flavor = &res->flavors->flavors[i];
5554 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5555 break;
5556
5557 p = xdr_inline_decode(xdr, 4);
5558 if (unlikely(!p))
5559 goto out_overflow;
5560 sec_flavor->flavor = be32_to_cpup(p);
5561
5562 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5563 status = decode_secinfo_gss(xdr, sec_flavor);
5564 if (status)
5565 goto out;
5566 }
5567 res->flavors->num_flavors++;
5568 }
5569
5570 status = 0;
5571 out:
5572 return status;
5573 out_overflow:
5574 print_overflow_msg(__func__, xdr);
5575 return -EIO;
5576 }
5577
5578 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5579 {
5580 int status = decode_op_hdr(xdr, OP_SECINFO);
5581 if (status)
5582 return status;
5583 return decode_secinfo_common(xdr, res);
5584 }
5585
5586 #if defined(CONFIG_NFS_V4_1)
5587 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5588 {
5589 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5590 if (status)
5591 return status;
5592 return decode_secinfo_common(xdr, res);
5593 }
5594
5595 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5596 {
5597 __be32 *p;
5598 uint32_t bitmap_words;
5599 unsigned int i;
5600
5601 p = xdr_inline_decode(xdr, 4);
5602 bitmap_words = be32_to_cpup(p++);
5603 if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5604 return -EIO;
5605 p = xdr_inline_decode(xdr, 4 * bitmap_words);
5606 for (i = 0; i < bitmap_words; i++)
5607 op_map->u.words[i] = be32_to_cpup(p++);
5608
5609 return 0;
5610 }
5611
5612 static int decode_exchange_id(struct xdr_stream *xdr,
5613 struct nfs41_exchange_id_res *res)
5614 {
5615 __be32 *p;
5616 uint32_t dummy;
5617 char *dummy_str;
5618 int status;
5619 uint32_t impl_id_count;
5620
5621 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5622 if (status)
5623 return status;
5624
5625 p = xdr_inline_decode(xdr, 8);
5626 if (unlikely(!p))
5627 goto out_overflow;
5628 xdr_decode_hyper(p, &res->clientid);
5629 p = xdr_inline_decode(xdr, 12);
5630 if (unlikely(!p))
5631 goto out_overflow;
5632 res->seqid = be32_to_cpup(p++);
5633 res->flags = be32_to_cpup(p++);
5634
5635 res->state_protect.how = be32_to_cpup(p);
5636 switch (res->state_protect.how) {
5637 case SP4_NONE:
5638 break;
5639 case SP4_MACH_CRED:
5640 status = decode_op_map(xdr, &res->state_protect.enforce);
5641 if (status)
5642 return status;
5643 status = decode_op_map(xdr, &res->state_protect.allow);
5644 if (status)
5645 return status;
5646 break;
5647 default:
5648 WARN_ON_ONCE(1);
5649 return -EIO;
5650 }
5651
5652 /* server_owner4.so_minor_id */
5653 p = xdr_inline_decode(xdr, 8);
5654 if (unlikely(!p))
5655 goto out_overflow;
5656 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5657
5658 /* server_owner4.so_major_id */
5659 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5660 if (unlikely(status))
5661 return status;
5662 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5663 return -EIO;
5664 memcpy(res->server_owner->major_id, dummy_str, dummy);
5665 res->server_owner->major_id_sz = dummy;
5666
5667 /* server_scope4 */
5668 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5669 if (unlikely(status))
5670 return status;
5671 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5672 return -EIO;
5673 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5674 res->server_scope->server_scope_sz = dummy;
5675
5676 /* Implementation Id */
5677 p = xdr_inline_decode(xdr, 4);
5678 if (unlikely(!p))
5679 goto out_overflow;
5680 impl_id_count = be32_to_cpup(p++);
5681
5682 if (impl_id_count) {
5683 /* nii_domain */
5684 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5685 if (unlikely(status))
5686 return status;
5687 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5688 return -EIO;
5689 memcpy(res->impl_id->domain, dummy_str, dummy);
5690
5691 /* nii_name */
5692 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5693 if (unlikely(status))
5694 return status;
5695 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5696 return -EIO;
5697 memcpy(res->impl_id->name, dummy_str, dummy);
5698
5699 /* nii_date */
5700 p = xdr_inline_decode(xdr, 12);
5701 if (unlikely(!p))
5702 goto out_overflow;
5703 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5704 res->impl_id->date.nseconds = be32_to_cpup(p);
5705
5706 /* if there's more than one entry, ignore the rest */
5707 }
5708 return 0;
5709 out_overflow:
5710 print_overflow_msg(__func__, xdr);
5711 return -EIO;
5712 }
5713
5714 static int decode_chan_attrs(struct xdr_stream *xdr,
5715 struct nfs4_channel_attrs *attrs)
5716 {
5717 __be32 *p;
5718 u32 nr_attrs, val;
5719
5720 p = xdr_inline_decode(xdr, 28);
5721 if (unlikely(!p))
5722 goto out_overflow;
5723 val = be32_to_cpup(p++); /* headerpadsz */
5724 if (val)
5725 return -EINVAL; /* no support for header padding yet */
5726 attrs->max_rqst_sz = be32_to_cpup(p++);
5727 attrs->max_resp_sz = be32_to_cpup(p++);
5728 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5729 attrs->max_ops = be32_to_cpup(p++);
5730 attrs->max_reqs = be32_to_cpup(p++);
5731 nr_attrs = be32_to_cpup(p);
5732 if (unlikely(nr_attrs > 1)) {
5733 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5734 "count %u\n", __func__, nr_attrs);
5735 return -EINVAL;
5736 }
5737 if (nr_attrs == 1) {
5738 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5739 if (unlikely(!p))
5740 goto out_overflow;
5741 }
5742 return 0;
5743 out_overflow:
5744 print_overflow_msg(__func__, xdr);
5745 return -EIO;
5746 }
5747
5748 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5749 {
5750 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5751 }
5752
5753 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5754 struct nfs41_bind_conn_to_session_res *res)
5755 {
5756 __be32 *p;
5757 int status;
5758
5759 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5760 if (!status)
5761 status = decode_sessionid(xdr, &res->sessionid);
5762 if (unlikely(status))
5763 return status;
5764
5765 /* dir flags, rdma mode bool */
5766 p = xdr_inline_decode(xdr, 8);
5767 if (unlikely(!p))
5768 goto out_overflow;
5769
5770 res->dir = be32_to_cpup(p++);
5771 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5772 return -EIO;
5773 if (be32_to_cpup(p) == 0)
5774 res->use_conn_in_rdma_mode = false;
5775 else
5776 res->use_conn_in_rdma_mode = true;
5777
5778 return 0;
5779 out_overflow:
5780 print_overflow_msg(__func__, xdr);
5781 return -EIO;
5782 }
5783
5784 static int decode_create_session(struct xdr_stream *xdr,
5785 struct nfs41_create_session_res *res)
5786 {
5787 __be32 *p;
5788 int status;
5789
5790 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5791 if (!status)
5792 status = decode_sessionid(xdr, &res->sessionid);
5793 if (unlikely(status))
5794 return status;
5795
5796 /* seqid, flags */
5797 p = xdr_inline_decode(xdr, 8);
5798 if (unlikely(!p))
5799 goto out_overflow;
5800 res->seqid = be32_to_cpup(p++);
5801 res->flags = be32_to_cpup(p);
5802
5803 /* Channel attributes */
5804 status = decode_chan_attrs(xdr, &res->fc_attrs);
5805 if (!status)
5806 status = decode_chan_attrs(xdr, &res->bc_attrs);
5807 return status;
5808 out_overflow:
5809 print_overflow_msg(__func__, xdr);
5810 return -EIO;
5811 }
5812
5813 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5814 {
5815 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5816 }
5817
5818 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5819 {
5820 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5821 }
5822
5823 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5824 {
5825 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5826 }
5827 #endif /* CONFIG_NFS_V4_1 */
5828
5829 static int decode_sequence(struct xdr_stream *xdr,
5830 struct nfs4_sequence_res *res,
5831 struct rpc_rqst *rqstp)
5832 {
5833 #if defined(CONFIG_NFS_V4_1)
5834 struct nfs4_session *session;
5835 struct nfs4_sessionid id;
5836 u32 dummy;
5837 int status;
5838 __be32 *p;
5839
5840 if (res->sr_slot == NULL)
5841 return 0;
5842 if (!res->sr_slot->table->session)
5843 return 0;
5844
5845 status = decode_op_hdr(xdr, OP_SEQUENCE);
5846 if (!status)
5847 status = decode_sessionid(xdr, &id);
5848 if (unlikely(status))
5849 goto out_err;
5850
5851 /*
5852 * If the server returns different values for sessionID, slotID or
5853 * sequence number, the server is looney tunes.
5854 */
5855 status = -EREMOTEIO;
5856 session = res->sr_slot->table->session;
5857
5858 if (memcmp(id.data, session->sess_id.data,
5859 NFS4_MAX_SESSIONID_LEN)) {
5860 dprintk("%s Invalid session id\n", __func__);
5861 goto out_err;
5862 }
5863
5864 p = xdr_inline_decode(xdr, 20);
5865 if (unlikely(!p))
5866 goto out_overflow;
5867
5868 /* seqid */
5869 dummy = be32_to_cpup(p++);
5870 if (dummy != res->sr_slot->seq_nr) {
5871 dprintk("%s Invalid sequence number\n", __func__);
5872 goto out_err;
5873 }
5874 /* slot id */
5875 dummy = be32_to_cpup(p++);
5876 if (dummy != res->sr_slot->slot_nr) {
5877 dprintk("%s Invalid slot id\n", __func__);
5878 goto out_err;
5879 }
5880 /* highest slot id */
5881 res->sr_highest_slotid = be32_to_cpup(p++);
5882 /* target highest slot id */
5883 res->sr_target_highest_slotid = be32_to_cpup(p++);
5884 /* result flags */
5885 res->sr_status_flags = be32_to_cpup(p);
5886 status = 0;
5887 out_err:
5888 res->sr_status = status;
5889 return status;
5890 out_overflow:
5891 print_overflow_msg(__func__, xdr);
5892 status = -EIO;
5893 goto out_err;
5894 #else /* CONFIG_NFS_V4_1 */
5895 return 0;
5896 #endif /* CONFIG_NFS_V4_1 */
5897 }
5898
5899 #if defined(CONFIG_NFS_V4_1)
5900 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5901 {
5902 stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5903 return decode_stateid(xdr, stateid);
5904 }
5905
5906 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5907 struct nfs4_getdeviceinfo_res *res)
5908 {
5909 struct pnfs_device *pdev = res->pdev;
5910 __be32 *p;
5911 uint32_t len, type;
5912 int status;
5913
5914 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5915 if (status) {
5916 if (status == -ETOOSMALL) {
5917 p = xdr_inline_decode(xdr, 4);
5918 if (unlikely(!p))
5919 goto out_overflow;
5920 pdev->mincount = be32_to_cpup(p);
5921 dprintk("%s: Min count too small. mincnt = %u\n",
5922 __func__, pdev->mincount);
5923 }
5924 return status;
5925 }
5926
5927 p = xdr_inline_decode(xdr, 8);
5928 if (unlikely(!p))
5929 goto out_overflow;
5930 type = be32_to_cpup(p++);
5931 if (type != pdev->layout_type) {
5932 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5933 __func__, pdev->layout_type, type);
5934 return -EINVAL;
5935 }
5936 /*
5937 * Get the length of the opaque device_addr4. xdr_read_pages places
5938 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5939 * and places the remaining xdr data in xdr_buf->tail
5940 */
5941 pdev->mincount = be32_to_cpup(p);
5942 if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5943 goto out_overflow;
5944
5945 /* Parse notification bitmap, verifying that it is zero. */
5946 p = xdr_inline_decode(xdr, 4);
5947 if (unlikely(!p))
5948 goto out_overflow;
5949 len = be32_to_cpup(p);
5950 if (len) {
5951 uint32_t i;
5952
5953 p = xdr_inline_decode(xdr, 4 * len);
5954 if (unlikely(!p))
5955 goto out_overflow;
5956
5957 res->notification = be32_to_cpup(p++);
5958 for (i = 1; i < len; i++) {
5959 if (be32_to_cpup(p++)) {
5960 dprintk("%s: unsupported notification\n",
5961 __func__);
5962 return -EIO;
5963 }
5964 }
5965 }
5966 return 0;
5967 out_overflow:
5968 print_overflow_msg(__func__, xdr);
5969 return -EIO;
5970 }
5971
5972 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5973 struct nfs4_layoutget_res *res)
5974 {
5975 __be32 *p;
5976 int status;
5977 u32 layout_count;
5978 u32 recvd;
5979
5980 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5981 if (status)
5982 return status;
5983 p = xdr_inline_decode(xdr, 4);
5984 if (unlikely(!p))
5985 goto out_overflow;
5986 res->return_on_close = be32_to_cpup(p);
5987 decode_layout_stateid(xdr, &res->stateid);
5988 p = xdr_inline_decode(xdr, 4);
5989 if (unlikely(!p))
5990 goto out_overflow;
5991 layout_count = be32_to_cpup(p);
5992 if (!layout_count) {
5993 dprintk("%s: server responded with empty layout array\n",
5994 __func__);
5995 return -EINVAL;
5996 }
5997
5998 p = xdr_inline_decode(xdr, 28);
5999 if (unlikely(!p))
6000 goto out_overflow;
6001 p = xdr_decode_hyper(p, &res->range.offset);
6002 p = xdr_decode_hyper(p, &res->range.length);
6003 res->range.iomode = be32_to_cpup(p++);
6004 res->type = be32_to_cpup(p++);
6005 res->layoutp->len = be32_to_cpup(p);
6006
6007 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
6008 __func__,
6009 (unsigned long)res->range.offset,
6010 (unsigned long)res->range.length,
6011 res->range.iomode,
6012 res->type,
6013 res->layoutp->len);
6014
6015 recvd = xdr_read_pages(xdr, res->layoutp->len);
6016 if (res->layoutp->len > recvd) {
6017 dprintk("NFS: server cheating in layoutget reply: "
6018 "layout len %u > recvd %u\n",
6019 res->layoutp->len, recvd);
6020 return -EINVAL;
6021 }
6022
6023 if (layout_count > 1) {
6024 /* We only handle a length one array at the moment. Any
6025 * further entries are just ignored. Note that this means
6026 * the client may see a response that is less than the
6027 * minimum it requested.
6028 */
6029 dprintk("%s: server responded with %d layouts, dropping tail\n",
6030 __func__, layout_count);
6031 }
6032
6033 return 0;
6034 out_overflow:
6035 print_overflow_msg(__func__, xdr);
6036 return -EIO;
6037 }
6038
6039 static int decode_layoutreturn(struct xdr_stream *xdr,
6040 struct nfs4_layoutreturn_res *res)
6041 {
6042 __be32 *p;
6043 int status;
6044
6045 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6046 if (status)
6047 return status;
6048 p = xdr_inline_decode(xdr, 4);
6049 if (unlikely(!p))
6050 goto out_overflow;
6051 res->lrs_present = be32_to_cpup(p);
6052 if (res->lrs_present)
6053 status = decode_layout_stateid(xdr, &res->stateid);
6054 return status;
6055 out_overflow:
6056 print_overflow_msg(__func__, xdr);
6057 return -EIO;
6058 }
6059
6060 static int decode_layoutcommit(struct xdr_stream *xdr,
6061 struct rpc_rqst *req,
6062 struct nfs4_layoutcommit_res *res)
6063 {
6064 __be32 *p;
6065 __u32 sizechanged;
6066 int status;
6067
6068 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6069 res->status = status;
6070 if (status)
6071 return status;
6072
6073 p = xdr_inline_decode(xdr, 4);
6074 if (unlikely(!p))
6075 goto out_overflow;
6076 sizechanged = be32_to_cpup(p);
6077
6078 if (sizechanged) {
6079 /* throw away new size */
6080 p = xdr_inline_decode(xdr, 8);
6081 if (unlikely(!p))
6082 goto out_overflow;
6083 }
6084 return 0;
6085 out_overflow:
6086 print_overflow_msg(__func__, xdr);
6087 return -EIO;
6088 }
6089
6090 static int decode_test_stateid(struct xdr_stream *xdr,
6091 struct nfs41_test_stateid_res *res)
6092 {
6093 __be32 *p;
6094 int status;
6095 int num_res;
6096
6097 status = decode_op_hdr(xdr, OP_TEST_STATEID);
6098 if (status)
6099 return status;
6100
6101 p = xdr_inline_decode(xdr, 4);
6102 if (unlikely(!p))
6103 goto out_overflow;
6104 num_res = be32_to_cpup(p++);
6105 if (num_res != 1)
6106 goto out;
6107
6108 p = xdr_inline_decode(xdr, 4);
6109 if (unlikely(!p))
6110 goto out_overflow;
6111 res->status = be32_to_cpup(p++);
6112
6113 return status;
6114 out_overflow:
6115 print_overflow_msg(__func__, xdr);
6116 out:
6117 return -EIO;
6118 }
6119
6120 static int decode_free_stateid(struct xdr_stream *xdr,
6121 struct nfs41_free_stateid_res *res)
6122 {
6123 res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6124 return res->status;
6125 }
6126 #else
6127 static inline
6128 int decode_layoutreturn(struct xdr_stream *xdr,
6129 struct nfs4_layoutreturn_res *res)
6130 {
6131 return 0;
6132 }
6133 #endif /* CONFIG_NFS_V4_1 */
6134
6135 /*
6136 * END OF "GENERIC" DECODE ROUTINES.
6137 */
6138
6139 /*
6140 * Decode OPEN_DOWNGRADE response
6141 */
6142 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6143 struct xdr_stream *xdr,
6144 struct nfs_closeres *res)
6145 {
6146 struct compound_hdr hdr;
6147 int status;
6148
6149 status = decode_compound_hdr(xdr, &hdr);
6150 if (status)
6151 goto out;
6152 status = decode_sequence(xdr, &res->seq_res, rqstp);
6153 if (status)
6154 goto out;
6155 status = decode_putfh(xdr);
6156 if (status)
6157 goto out;
6158 if (res->lr_res) {
6159 status = decode_layoutreturn(xdr, res->lr_res);
6160 res->lr_ret = status;
6161 if (status)
6162 goto out;
6163 }
6164 status = decode_open_downgrade(xdr, res);
6165 out:
6166 return status;
6167 }
6168
6169 /*
6170 * Decode ACCESS response
6171 */
6172 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6173 struct nfs4_accessres *res)
6174 {
6175 struct compound_hdr hdr;
6176 int status;
6177
6178 status = decode_compound_hdr(xdr, &hdr);
6179 if (status)
6180 goto out;
6181 status = decode_sequence(xdr, &res->seq_res, rqstp);
6182 if (status)
6183 goto out;
6184 status = decode_putfh(xdr);
6185 if (status != 0)
6186 goto out;
6187 status = decode_access(xdr, &res->supported, &res->access);
6188 if (status != 0)
6189 goto out;
6190 decode_getfattr(xdr, res->fattr, res->server);
6191 out:
6192 return status;
6193 }
6194
6195 /*
6196 * Decode LOOKUP response
6197 */
6198 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6199 struct nfs4_lookup_res *res)
6200 {
6201 struct compound_hdr hdr;
6202 int status;
6203
6204 status = decode_compound_hdr(xdr, &hdr);
6205 if (status)
6206 goto out;
6207 status = decode_sequence(xdr, &res->seq_res, rqstp);
6208 if (status)
6209 goto out;
6210 status = decode_putfh(xdr);
6211 if (status)
6212 goto out;
6213 status = decode_lookup(xdr);
6214 if (status)
6215 goto out;
6216 status = decode_getfh(xdr, res->fh);
6217 if (status)
6218 goto out;
6219 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6220 out:
6221 return status;
6222 }
6223
6224 /*
6225 * Decode LOOKUP_ROOT response
6226 */
6227 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6228 struct xdr_stream *xdr,
6229 struct nfs4_lookup_res *res)
6230 {
6231 struct compound_hdr hdr;
6232 int status;
6233
6234 status = decode_compound_hdr(xdr, &hdr);
6235 if (status)
6236 goto out;
6237 status = decode_sequence(xdr, &res->seq_res, rqstp);
6238 if (status)
6239 goto out;
6240 status = decode_putrootfh(xdr);
6241 if (status)
6242 goto out;
6243 status = decode_getfh(xdr, res->fh);
6244 if (status == 0)
6245 status = decode_getfattr_label(xdr, res->fattr,
6246 res->label, res->server);
6247 out:
6248 return status;
6249 }
6250
6251 /*
6252 * Decode REMOVE response
6253 */
6254 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6255 struct nfs_removeres *res)
6256 {
6257 struct compound_hdr hdr;
6258 int status;
6259
6260 status = decode_compound_hdr(xdr, &hdr);
6261 if (status)
6262 goto out;
6263 status = decode_sequence(xdr, &res->seq_res, rqstp);
6264 if (status)
6265 goto out;
6266 status = decode_putfh(xdr);
6267 if (status)
6268 goto out;
6269 status = decode_remove(xdr, &res->cinfo);
6270 out:
6271 return status;
6272 }
6273
6274 /*
6275 * Decode RENAME response
6276 */
6277 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6278 struct nfs_renameres *res)
6279 {
6280 struct compound_hdr hdr;
6281 int status;
6282
6283 status = decode_compound_hdr(xdr, &hdr);
6284 if (status)
6285 goto out;
6286 status = decode_sequence(xdr, &res->seq_res, rqstp);
6287 if (status)
6288 goto out;
6289 status = decode_putfh(xdr);
6290 if (status)
6291 goto out;
6292 status = decode_savefh(xdr);
6293 if (status)
6294 goto out;
6295 status = decode_putfh(xdr);
6296 if (status)
6297 goto out;
6298 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6299 out:
6300 return status;
6301 }
6302
6303 /*
6304 * Decode LINK response
6305 */
6306 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6307 struct nfs4_link_res *res)
6308 {
6309 struct compound_hdr hdr;
6310 int status;
6311
6312 status = decode_compound_hdr(xdr, &hdr);
6313 if (status)
6314 goto out;
6315 status = decode_sequence(xdr, &res->seq_res, rqstp);
6316 if (status)
6317 goto out;
6318 status = decode_putfh(xdr);
6319 if (status)
6320 goto out;
6321 status = decode_savefh(xdr);
6322 if (status)
6323 goto out;
6324 status = decode_putfh(xdr);
6325 if (status)
6326 goto out;
6327 status = decode_link(xdr, &res->cinfo);
6328 if (status)
6329 goto out;
6330 /*
6331 * Note order: OP_LINK leaves the directory as the current
6332 * filehandle.
6333 */
6334 status = decode_restorefh(xdr);
6335 if (status)
6336 goto out;
6337 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6338 out:
6339 return status;
6340 }
6341
6342 /*
6343 * Decode CREATE response
6344 */
6345 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6346 struct nfs4_create_res *res)
6347 {
6348 struct compound_hdr hdr;
6349 int status;
6350
6351 status = decode_compound_hdr(xdr, &hdr);
6352 if (status)
6353 goto out;
6354 status = decode_sequence(xdr, &res->seq_res, rqstp);
6355 if (status)
6356 goto out;
6357 status = decode_putfh(xdr);
6358 if (status)
6359 goto out;
6360 status = decode_create(xdr, &res->dir_cinfo);
6361 if (status)
6362 goto out;
6363 status = decode_getfh(xdr, res->fh);
6364 if (status)
6365 goto out;
6366 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6367 out:
6368 return status;
6369 }
6370
6371 /*
6372 * Decode SYMLINK response
6373 */
6374 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6375 struct nfs4_create_res *res)
6376 {
6377 return nfs4_xdr_dec_create(rqstp, xdr, res);
6378 }
6379
6380 /*
6381 * Decode GETATTR response
6382 */
6383 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6384 struct nfs4_getattr_res *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_getfattr_label(xdr, res->fattr, res->label, res->server);
6399 out:
6400 return status;
6401 }
6402
6403 /*
6404 * Encode an SETACL request
6405 */
6406 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6407 struct nfs_setaclargs *args)
6408 {
6409 struct compound_hdr hdr = {
6410 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6411 };
6412
6413 encode_compound_hdr(xdr, req, &hdr);
6414 encode_sequence(xdr, &args->seq_args, &hdr);
6415 encode_putfh(xdr, args->fh, &hdr);
6416 encode_setacl(xdr, args, &hdr);
6417 encode_nops(&hdr);
6418 }
6419
6420 /*
6421 * Decode SETACL response
6422 */
6423 static int
6424 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6425 struct nfs_setaclres *res)
6426 {
6427 struct compound_hdr hdr;
6428 int status;
6429
6430 status = decode_compound_hdr(xdr, &hdr);
6431 if (status)
6432 goto out;
6433 status = decode_sequence(xdr, &res->seq_res, rqstp);
6434 if (status)
6435 goto out;
6436 status = decode_putfh(xdr);
6437 if (status)
6438 goto out;
6439 status = decode_setattr(xdr);
6440 out:
6441 return status;
6442 }
6443
6444 /*
6445 * Decode GETACL response
6446 */
6447 static int
6448 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6449 struct nfs_getaclres *res)
6450 {
6451 struct compound_hdr hdr;
6452 int status;
6453
6454 if (res->acl_scratch != NULL) {
6455 void *p = page_address(res->acl_scratch);
6456 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6457 }
6458 status = decode_compound_hdr(xdr, &hdr);
6459 if (status)
6460 goto out;
6461 status = decode_sequence(xdr, &res->seq_res, rqstp);
6462 if (status)
6463 goto out;
6464 status = decode_putfh(xdr);
6465 if (status)
6466 goto out;
6467 status = decode_getacl(xdr, rqstp, res);
6468
6469 out:
6470 return status;
6471 }
6472
6473 /*
6474 * Decode CLOSE response
6475 */
6476 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6477 struct nfs_closeres *res)
6478 {
6479 struct compound_hdr hdr;
6480 int status;
6481
6482 status = decode_compound_hdr(xdr, &hdr);
6483 if (status)
6484 goto out;
6485 status = decode_sequence(xdr, &res->seq_res, rqstp);
6486 if (status)
6487 goto out;
6488 status = decode_putfh(xdr);
6489 if (status)
6490 goto out;
6491 if (res->lr_res) {
6492 status = decode_layoutreturn(xdr, res->lr_res);
6493 res->lr_ret = status;
6494 if (status)
6495 goto out;
6496 }
6497 status = decode_close(xdr, res);
6498 if (status != 0)
6499 goto out;
6500 /*
6501 * Note: Server may do delete on close for this file
6502 * in which case the getattr call will fail with
6503 * an ESTALE error. Shouldn't be a problem,
6504 * though, since fattr->valid will remain unset.
6505 */
6506 decode_getfattr(xdr, res->fattr, res->server);
6507 out:
6508 return status;
6509 }
6510
6511 /*
6512 * Decode OPEN response
6513 */
6514 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6515 struct nfs_openres *res)
6516 {
6517 struct compound_hdr hdr;
6518 int status;
6519
6520 status = decode_compound_hdr(xdr, &hdr);
6521 if (status)
6522 goto out;
6523 status = decode_sequence(xdr, &res->seq_res, rqstp);
6524 if (status)
6525 goto out;
6526 status = decode_putfh(xdr);
6527 if (status)
6528 goto out;
6529 status = decode_open(xdr, res);
6530 if (status)
6531 goto out;
6532 status = decode_getfh(xdr, &res->fh);
6533 if (status)
6534 goto out;
6535 if (res->access_request)
6536 decode_access(xdr, &res->access_supported, &res->access_result);
6537 decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6538 out:
6539 return status;
6540 }
6541
6542 /*
6543 * Decode OPEN_CONFIRM response
6544 */
6545 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6546 struct xdr_stream *xdr,
6547 struct nfs_open_confirmres *res)
6548 {
6549 struct compound_hdr hdr;
6550 int status;
6551
6552 status = decode_compound_hdr(xdr, &hdr);
6553 if (status)
6554 goto out;
6555 status = decode_putfh(xdr);
6556 if (status)
6557 goto out;
6558 status = decode_open_confirm(xdr, res);
6559 out:
6560 return status;
6561 }
6562
6563 /*
6564 * Decode OPEN response
6565 */
6566 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6567 struct xdr_stream *xdr,
6568 struct nfs_openres *res)
6569 {
6570 struct compound_hdr hdr;
6571 int status;
6572
6573 status = decode_compound_hdr(xdr, &hdr);
6574 if (status)
6575 goto out;
6576 status = decode_sequence(xdr, &res->seq_res, rqstp);
6577 if (status)
6578 goto out;
6579 status = decode_putfh(xdr);
6580 if (status)
6581 goto out;
6582 status = decode_open(xdr, res);
6583 if (status)
6584 goto out;
6585 if (res->access_request)
6586 decode_access(xdr, &res->access_supported, &res->access_result);
6587 decode_getfattr(xdr, res->f_attr, res->server);
6588 out:
6589 return status;
6590 }
6591
6592 /*
6593 * Decode SETATTR response
6594 */
6595 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6596 struct xdr_stream *xdr,
6597 struct nfs_setattrres *res)
6598 {
6599 struct compound_hdr hdr;
6600 int status;
6601
6602 status = decode_compound_hdr(xdr, &hdr);
6603 if (status)
6604 goto out;
6605 status = decode_sequence(xdr, &res->seq_res, rqstp);
6606 if (status)
6607 goto out;
6608 status = decode_putfh(xdr);
6609 if (status)
6610 goto out;
6611 status = decode_setattr(xdr);
6612 if (status)
6613 goto out;
6614 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6615 out:
6616 return status;
6617 }
6618
6619 /*
6620 * Decode LOCK response
6621 */
6622 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6623 struct nfs_lock_res *res)
6624 {
6625 struct compound_hdr hdr;
6626 int status;
6627
6628 status = decode_compound_hdr(xdr, &hdr);
6629 if (status)
6630 goto out;
6631 status = decode_sequence(xdr, &res->seq_res, rqstp);
6632 if (status)
6633 goto out;
6634 status = decode_putfh(xdr);
6635 if (status)
6636 goto out;
6637 status = decode_lock(xdr, res);
6638 out:
6639 return status;
6640 }
6641
6642 /*
6643 * Decode LOCKT response
6644 */
6645 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6646 struct nfs_lockt_res *res)
6647 {
6648 struct compound_hdr hdr;
6649 int status;
6650
6651 status = decode_compound_hdr(xdr, &hdr);
6652 if (status)
6653 goto out;
6654 status = decode_sequence(xdr, &res->seq_res, rqstp);
6655 if (status)
6656 goto out;
6657 status = decode_putfh(xdr);
6658 if (status)
6659 goto out;
6660 status = decode_lockt(xdr, res);
6661 out:
6662 return status;
6663 }
6664
6665 /*
6666 * Decode LOCKU response
6667 */
6668 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6669 struct nfs_locku_res *res)
6670 {
6671 struct compound_hdr hdr;
6672 int status;
6673
6674 status = decode_compound_hdr(xdr, &hdr);
6675 if (status)
6676 goto out;
6677 status = decode_sequence(xdr, &res->seq_res, rqstp);
6678 if (status)
6679 goto out;
6680 status = decode_putfh(xdr);
6681 if (status)
6682 goto out;
6683 status = decode_locku(xdr, res);
6684 out:
6685 return status;
6686 }
6687
6688 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6689 struct xdr_stream *xdr, void *dummy)
6690 {
6691 struct compound_hdr hdr;
6692 int status;
6693
6694 status = decode_compound_hdr(xdr, &hdr);
6695 if (!status)
6696 status = decode_release_lockowner(xdr);
6697 return status;
6698 }
6699
6700 /*
6701 * Decode READLINK response
6702 */
6703 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6704 struct xdr_stream *xdr,
6705 struct nfs4_readlink_res *res)
6706 {
6707 struct compound_hdr hdr;
6708 int status;
6709
6710 status = decode_compound_hdr(xdr, &hdr);
6711 if (status)
6712 goto out;
6713 status = decode_sequence(xdr, &res->seq_res, rqstp);
6714 if (status)
6715 goto out;
6716 status = decode_putfh(xdr);
6717 if (status)
6718 goto out;
6719 status = decode_readlink(xdr, rqstp);
6720 out:
6721 return status;
6722 }
6723
6724 /*
6725 * Decode READDIR response
6726 */
6727 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6728 struct nfs4_readdir_res *res)
6729 {
6730 struct compound_hdr hdr;
6731 int status;
6732
6733 status = decode_compound_hdr(xdr, &hdr);
6734 if (status)
6735 goto out;
6736 status = decode_sequence(xdr, &res->seq_res, rqstp);
6737 if (status)
6738 goto out;
6739 status = decode_putfh(xdr);
6740 if (status)
6741 goto out;
6742 status = decode_readdir(xdr, rqstp, res);
6743 out:
6744 return status;
6745 }
6746
6747 /*
6748 * Decode Read response
6749 */
6750 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6751 struct nfs_pgio_res *res)
6752 {
6753 struct compound_hdr hdr;
6754 int status;
6755
6756 status = decode_compound_hdr(xdr, &hdr);
6757 res->op_status = hdr.status;
6758 if (status)
6759 goto out;
6760 status = decode_sequence(xdr, &res->seq_res, rqstp);
6761 if (status)
6762 goto out;
6763 status = decode_putfh(xdr);
6764 if (status)
6765 goto out;
6766 status = decode_read(xdr, rqstp, res);
6767 if (!status)
6768 status = res->count;
6769 out:
6770 return status;
6771 }
6772
6773 /*
6774 * Decode WRITE response
6775 */
6776 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6777 struct nfs_pgio_res *res)
6778 {
6779 struct compound_hdr hdr;
6780 int status;
6781
6782 status = decode_compound_hdr(xdr, &hdr);
6783 res->op_status = hdr.status;
6784 if (status)
6785 goto out;
6786 status = decode_sequence(xdr, &res->seq_res, rqstp);
6787 if (status)
6788 goto out;
6789 status = decode_putfh(xdr);
6790 if (status)
6791 goto out;
6792 status = decode_write(xdr, res);
6793 if (status)
6794 goto out;
6795 if (res->fattr)
6796 decode_getfattr(xdr, res->fattr, res->server);
6797 if (!status)
6798 status = res->count;
6799 out:
6800 return status;
6801 }
6802
6803 /*
6804 * Decode COMMIT response
6805 */
6806 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6807 struct nfs_commitres *res)
6808 {
6809 struct compound_hdr hdr;
6810 int status;
6811
6812 status = decode_compound_hdr(xdr, &hdr);
6813 res->op_status = hdr.status;
6814 if (status)
6815 goto out;
6816 status = decode_sequence(xdr, &res->seq_res, rqstp);
6817 if (status)
6818 goto out;
6819 status = decode_putfh(xdr);
6820 if (status)
6821 goto out;
6822 status = decode_commit(xdr, res);
6823 out:
6824 return status;
6825 }
6826
6827 /*
6828 * Decode FSINFO response
6829 */
6830 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6831 struct nfs4_fsinfo_res *res)
6832 {
6833 struct compound_hdr hdr;
6834 int status;
6835
6836 status = decode_compound_hdr(xdr, &hdr);
6837 if (!status)
6838 status = decode_sequence(xdr, &res->seq_res, req);
6839 if (!status)
6840 status = decode_putfh(xdr);
6841 if (!status)
6842 status = decode_fsinfo(xdr, res->fsinfo);
6843 return status;
6844 }
6845
6846 /*
6847 * Decode PATHCONF response
6848 */
6849 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6850 struct nfs4_pathconf_res *res)
6851 {
6852 struct compound_hdr hdr;
6853 int status;
6854
6855 status = decode_compound_hdr(xdr, &hdr);
6856 if (!status)
6857 status = decode_sequence(xdr, &res->seq_res, req);
6858 if (!status)
6859 status = decode_putfh(xdr);
6860 if (!status)
6861 status = decode_pathconf(xdr, res->pathconf);
6862 return status;
6863 }
6864
6865 /*
6866 * Decode STATFS response
6867 */
6868 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6869 struct nfs4_statfs_res *res)
6870 {
6871 struct compound_hdr hdr;
6872 int status;
6873
6874 status = decode_compound_hdr(xdr, &hdr);
6875 if (!status)
6876 status = decode_sequence(xdr, &res->seq_res, req);
6877 if (!status)
6878 status = decode_putfh(xdr);
6879 if (!status)
6880 status = decode_statfs(xdr, res->fsstat);
6881 return status;
6882 }
6883
6884 /*
6885 * Decode GETATTR_BITMAP response
6886 */
6887 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6888 struct xdr_stream *xdr,
6889 struct nfs4_server_caps_res *res)
6890 {
6891 struct compound_hdr hdr;
6892 int status;
6893
6894 status = decode_compound_hdr(xdr, &hdr);
6895 if (status)
6896 goto out;
6897 status = decode_sequence(xdr, &res->seq_res, req);
6898 if (status)
6899 goto out;
6900 status = decode_putfh(xdr);
6901 if (status)
6902 goto out;
6903 status = decode_server_caps(xdr, res);
6904 out:
6905 return status;
6906 }
6907
6908 /*
6909 * Decode RENEW response
6910 */
6911 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6912 void *__unused)
6913 {
6914 struct compound_hdr hdr;
6915 int status;
6916
6917 status = decode_compound_hdr(xdr, &hdr);
6918 if (!status)
6919 status = decode_renew(xdr);
6920 return status;
6921 }
6922
6923 /*
6924 * Decode SETCLIENTID response
6925 */
6926 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6927 struct xdr_stream *xdr,
6928 struct nfs4_setclientid_res *res)
6929 {
6930 struct compound_hdr hdr;
6931 int status;
6932
6933 status = decode_compound_hdr(xdr, &hdr);
6934 if (!status)
6935 status = decode_setclientid(xdr, res);
6936 return status;
6937 }
6938
6939 /*
6940 * Decode SETCLIENTID_CONFIRM response
6941 */
6942 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6943 struct xdr_stream *xdr)
6944 {
6945 struct compound_hdr hdr;
6946 int status;
6947
6948 status = decode_compound_hdr(xdr, &hdr);
6949 if (!status)
6950 status = decode_setclientid_confirm(xdr);
6951 return status;
6952 }
6953
6954 /*
6955 * Decode DELEGRETURN response
6956 */
6957 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6958 struct xdr_stream *xdr,
6959 struct nfs4_delegreturnres *res)
6960 {
6961 struct compound_hdr hdr;
6962 int status;
6963
6964 status = decode_compound_hdr(xdr, &hdr);
6965 if (status)
6966 goto out;
6967 status = decode_sequence(xdr, &res->seq_res, rqstp);
6968 if (status)
6969 goto out;
6970 status = decode_putfh(xdr);
6971 if (status != 0)
6972 goto out;
6973 if (res->lr_res) {
6974 status = decode_layoutreturn(xdr, res->lr_res);
6975 res->lr_ret = status;
6976 if (status)
6977 goto out;
6978 }
6979 status = decode_getfattr(xdr, res->fattr, res->server);
6980 if (status != 0)
6981 goto out;
6982 status = decode_delegreturn(xdr);
6983 out:
6984 return status;
6985 }
6986
6987 /*
6988 * Decode FS_LOCATIONS response
6989 */
6990 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6991 struct xdr_stream *xdr,
6992 struct nfs4_fs_locations_res *res)
6993 {
6994 struct compound_hdr hdr;
6995 int status;
6996
6997 status = decode_compound_hdr(xdr, &hdr);
6998 if (status)
6999 goto out;
7000 status = decode_sequence(xdr, &res->seq_res, req);
7001 if (status)
7002 goto out;
7003 status = decode_putfh(xdr);
7004 if (status)
7005 goto out;
7006 if (res->migration) {
7007 xdr_enter_page(xdr, PAGE_SIZE);
7008 status = decode_getfattr_generic(xdr,
7009 &res->fs_locations->fattr,
7010 NULL, res->fs_locations,
7011 NULL, res->fs_locations->server);
7012 if (status)
7013 goto out;
7014 if (res->renew)
7015 status = decode_renew(xdr);
7016 } else {
7017 status = decode_lookup(xdr);
7018 if (status)
7019 goto out;
7020 xdr_enter_page(xdr, PAGE_SIZE);
7021 status = decode_getfattr_generic(xdr,
7022 &res->fs_locations->fattr,
7023 NULL, res->fs_locations,
7024 NULL, res->fs_locations->server);
7025 }
7026 out:
7027 return status;
7028 }
7029
7030 /*
7031 * Decode SECINFO response
7032 */
7033 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7034 struct xdr_stream *xdr,
7035 struct nfs4_secinfo_res *res)
7036 {
7037 struct compound_hdr hdr;
7038 int status;
7039
7040 status = decode_compound_hdr(xdr, &hdr);
7041 if (status)
7042 goto out;
7043 status = decode_sequence(xdr, &res->seq_res, rqstp);
7044 if (status)
7045 goto out;
7046 status = decode_putfh(xdr);
7047 if (status)
7048 goto out;
7049 status = decode_secinfo(xdr, res);
7050 out:
7051 return status;
7052 }
7053
7054 /*
7055 * Decode FSID_PRESENT response
7056 */
7057 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7058 struct xdr_stream *xdr,
7059 struct nfs4_fsid_present_res *res)
7060 {
7061 struct compound_hdr hdr;
7062 int status;
7063
7064 status = decode_compound_hdr(xdr, &hdr);
7065 if (status)
7066 goto out;
7067 status = decode_sequence(xdr, &res->seq_res, rqstp);
7068 if (status)
7069 goto out;
7070 status = decode_putfh(xdr);
7071 if (status)
7072 goto out;
7073 status = decode_getfh(xdr, res->fh);
7074 if (status)
7075 goto out;
7076 if (res->renew)
7077 status = decode_renew(xdr);
7078 out:
7079 return status;
7080 }
7081
7082 #if defined(CONFIG_NFS_V4_1)
7083 /*
7084 * Decode BIND_CONN_TO_SESSION response
7085 */
7086 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7087 struct xdr_stream *xdr,
7088 void *res)
7089 {
7090 struct compound_hdr hdr;
7091 int status;
7092
7093 status = decode_compound_hdr(xdr, &hdr);
7094 if (!status)
7095 status = decode_bind_conn_to_session(xdr, res);
7096 return status;
7097 }
7098
7099 /*
7100 * Decode EXCHANGE_ID response
7101 */
7102 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7103 struct xdr_stream *xdr,
7104 void *res)
7105 {
7106 struct compound_hdr hdr;
7107 int status;
7108
7109 status = decode_compound_hdr(xdr, &hdr);
7110 if (!status)
7111 status = decode_exchange_id(xdr, res);
7112 return status;
7113 }
7114
7115 /*
7116 * Decode CREATE_SESSION response
7117 */
7118 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7119 struct xdr_stream *xdr,
7120 struct nfs41_create_session_res *res)
7121 {
7122 struct compound_hdr hdr;
7123 int status;
7124
7125 status = decode_compound_hdr(xdr, &hdr);
7126 if (!status)
7127 status = decode_create_session(xdr, res);
7128 return status;
7129 }
7130
7131 /*
7132 * Decode DESTROY_SESSION response
7133 */
7134 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7135 struct xdr_stream *xdr,
7136 void *res)
7137 {
7138 struct compound_hdr hdr;
7139 int status;
7140
7141 status = decode_compound_hdr(xdr, &hdr);
7142 if (!status)
7143 status = decode_destroy_session(xdr, res);
7144 return status;
7145 }
7146
7147 /*
7148 * Decode DESTROY_CLIENTID response
7149 */
7150 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7151 struct xdr_stream *xdr,
7152 void *res)
7153 {
7154 struct compound_hdr hdr;
7155 int status;
7156
7157 status = decode_compound_hdr(xdr, &hdr);
7158 if (!status)
7159 status = decode_destroy_clientid(xdr, res);
7160 return status;
7161 }
7162
7163 /*
7164 * Decode SEQUENCE response
7165 */
7166 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7167 struct xdr_stream *xdr,
7168 struct nfs4_sequence_res *res)
7169 {
7170 struct compound_hdr hdr;
7171 int status;
7172
7173 status = decode_compound_hdr(xdr, &hdr);
7174 if (!status)
7175 status = decode_sequence(xdr, res, rqstp);
7176 return status;
7177 }
7178
7179 /*
7180 * Decode GET_LEASE_TIME response
7181 */
7182 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7183 struct xdr_stream *xdr,
7184 struct nfs4_get_lease_time_res *res)
7185 {
7186 struct compound_hdr hdr;
7187 int status;
7188
7189 status = decode_compound_hdr(xdr, &hdr);
7190 if (!status)
7191 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7192 if (!status)
7193 status = decode_putrootfh(xdr);
7194 if (!status)
7195 status = decode_fsinfo(xdr, res->lr_fsinfo);
7196 return status;
7197 }
7198
7199 /*
7200 * Decode RECLAIM_COMPLETE response
7201 */
7202 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7203 struct xdr_stream *xdr,
7204 struct nfs41_reclaim_complete_res *res)
7205 {
7206 struct compound_hdr hdr;
7207 int status;
7208
7209 status = decode_compound_hdr(xdr, &hdr);
7210 if (!status)
7211 status = decode_sequence(xdr, &res->seq_res, rqstp);
7212 if (!status)
7213 status = decode_reclaim_complete(xdr, NULL);
7214 return status;
7215 }
7216
7217 /*
7218 * Decode GETDEVINFO response
7219 */
7220 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7221 struct xdr_stream *xdr,
7222 struct nfs4_getdeviceinfo_res *res)
7223 {
7224 struct compound_hdr hdr;
7225 int status;
7226
7227 status = decode_compound_hdr(xdr, &hdr);
7228 if (status != 0)
7229 goto out;
7230 status = decode_sequence(xdr, &res->seq_res, rqstp);
7231 if (status != 0)
7232 goto out;
7233 status = decode_getdeviceinfo(xdr, res);
7234 out:
7235 return status;
7236 }
7237
7238 /*
7239 * Decode LAYOUTGET response
7240 */
7241 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7242 struct xdr_stream *xdr,
7243 struct nfs4_layoutget_res *res)
7244 {
7245 struct compound_hdr hdr;
7246 int status;
7247
7248 status = decode_compound_hdr(xdr, &hdr);
7249 if (status)
7250 goto out;
7251 status = decode_sequence(xdr, &res->seq_res, rqstp);
7252 if (status)
7253 goto out;
7254 status = decode_putfh(xdr);
7255 if (status)
7256 goto out;
7257 status = decode_layoutget(xdr, rqstp, res);
7258 out:
7259 return status;
7260 }
7261
7262 /*
7263 * Decode LAYOUTRETURN response
7264 */
7265 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7266 struct xdr_stream *xdr,
7267 struct nfs4_layoutreturn_res *res)
7268 {
7269 struct compound_hdr hdr;
7270 int status;
7271
7272 status = decode_compound_hdr(xdr, &hdr);
7273 if (status)
7274 goto out;
7275 status = decode_sequence(xdr, &res->seq_res, rqstp);
7276 if (status)
7277 goto out;
7278 status = decode_putfh(xdr);
7279 if (status)
7280 goto out;
7281 status = decode_layoutreturn(xdr, res);
7282 out:
7283 return status;
7284 }
7285
7286 /*
7287 * Decode LAYOUTCOMMIT response
7288 */
7289 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7290 struct xdr_stream *xdr,
7291 struct nfs4_layoutcommit_res *res)
7292 {
7293 struct compound_hdr hdr;
7294 int status;
7295
7296 status = decode_compound_hdr(xdr, &hdr);
7297 if (status)
7298 goto out;
7299 status = decode_sequence(xdr, &res->seq_res, rqstp);
7300 if (status)
7301 goto out;
7302 status = decode_putfh(xdr);
7303 if (status)
7304 goto out;
7305 status = decode_layoutcommit(xdr, rqstp, res);
7306 if (status)
7307 goto out;
7308 decode_getfattr(xdr, res->fattr, res->server);
7309 out:
7310 return status;
7311 }
7312
7313 /*
7314 * Decode SECINFO_NO_NAME response
7315 */
7316 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7317 struct xdr_stream *xdr,
7318 struct nfs4_secinfo_res *res)
7319 {
7320 struct compound_hdr hdr;
7321 int status;
7322
7323 status = decode_compound_hdr(xdr, &hdr);
7324 if (status)
7325 goto out;
7326 status = decode_sequence(xdr, &res->seq_res, rqstp);
7327 if (status)
7328 goto out;
7329 status = decode_putrootfh(xdr);
7330 if (status)
7331 goto out;
7332 status = decode_secinfo_no_name(xdr, res);
7333 out:
7334 return status;
7335 }
7336
7337 /*
7338 * Decode TEST_STATEID response
7339 */
7340 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7341 struct xdr_stream *xdr,
7342 struct nfs41_test_stateid_res *res)
7343 {
7344 struct compound_hdr hdr;
7345 int status;
7346
7347 status = decode_compound_hdr(xdr, &hdr);
7348 if (status)
7349 goto out;
7350 status = decode_sequence(xdr, &res->seq_res, rqstp);
7351 if (status)
7352 goto out;
7353 status = decode_test_stateid(xdr, res);
7354 out:
7355 return status;
7356 }
7357
7358 /*
7359 * Decode FREE_STATEID response
7360 */
7361 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7362 struct xdr_stream *xdr,
7363 struct nfs41_free_stateid_res *res)
7364 {
7365 struct compound_hdr hdr;
7366 int status;
7367
7368 status = decode_compound_hdr(xdr, &hdr);
7369 if (status)
7370 goto out;
7371 status = decode_sequence(xdr, &res->seq_res, rqstp);
7372 if (status)
7373 goto out;
7374 status = decode_free_stateid(xdr, res);
7375 out:
7376 return status;
7377 }
7378 #endif /* CONFIG_NFS_V4_1 */
7379
7380 /**
7381 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7382 * the local page cache.
7383 * @xdr: XDR stream where entry resides
7384 * @entry: buffer to fill in with entry data
7385 * @plus: boolean indicating whether this should be a readdirplus entry
7386 *
7387 * Returns zero if successful, otherwise a negative errno value is
7388 * returned.
7389 *
7390 * This function is not invoked during READDIR reply decoding, but
7391 * rather whenever an application invokes the getdents(2) system call
7392 * on a directory already in our cache.
7393 */
7394 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7395 int plus)
7396 {
7397 unsigned int savep;
7398 uint32_t bitmap[3] = {0};
7399 uint32_t len;
7400 __be32 *p = xdr_inline_decode(xdr, 4);
7401 if (unlikely(!p))
7402 goto out_overflow;
7403 if (*p == xdr_zero) {
7404 p = xdr_inline_decode(xdr, 4);
7405 if (unlikely(!p))
7406 goto out_overflow;
7407 if (*p == xdr_zero)
7408 return -EAGAIN;
7409 entry->eof = 1;
7410 return -EBADCOOKIE;
7411 }
7412
7413 p = xdr_inline_decode(xdr, 12);
7414 if (unlikely(!p))
7415 goto out_overflow;
7416 entry->prev_cookie = entry->cookie;
7417 p = xdr_decode_hyper(p, &entry->cookie);
7418 entry->len = be32_to_cpup(p);
7419
7420 p = xdr_inline_decode(xdr, entry->len);
7421 if (unlikely(!p))
7422 goto out_overflow;
7423 entry->name = (const char *) p;
7424
7425 /*
7426 * In case the server doesn't return an inode number,
7427 * we fake one here. (We don't use inode number 0,
7428 * since glibc seems to choke on it...)
7429 */
7430 entry->ino = 1;
7431 entry->fattr->valid = 0;
7432
7433 if (decode_attr_bitmap(xdr, bitmap) < 0)
7434 goto out_overflow;
7435
7436 if (decode_attr_length(xdr, &len, &savep) < 0)
7437 goto out_overflow;
7438
7439 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7440 NULL, entry->label, entry->server) < 0)
7441 goto out_overflow;
7442 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7443 entry->ino = entry->fattr->mounted_on_fileid;
7444 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7445 entry->ino = entry->fattr->fileid;
7446
7447 entry->d_type = DT_UNKNOWN;
7448 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7449 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7450
7451 return 0;
7452
7453 out_overflow:
7454 print_overflow_msg(__func__, xdr);
7455 return -EAGAIN;
7456 }
7457
7458 /*
7459 * We need to translate between nfs status return values and
7460 * the local errno values which may not be the same.
7461 */
7462 static struct {
7463 int stat;
7464 int errno;
7465 } nfs_errtbl[] = {
7466 { NFS4_OK, 0 },
7467 { NFS4ERR_PERM, -EPERM },
7468 { NFS4ERR_NOENT, -ENOENT },
7469 { NFS4ERR_IO, -errno_NFSERR_IO},
7470 { NFS4ERR_NXIO, -ENXIO },
7471 { NFS4ERR_ACCESS, -EACCES },
7472 { NFS4ERR_EXIST, -EEXIST },
7473 { NFS4ERR_XDEV, -EXDEV },
7474 { NFS4ERR_NOTDIR, -ENOTDIR },
7475 { NFS4ERR_ISDIR, -EISDIR },
7476 { NFS4ERR_INVAL, -EINVAL },
7477 { NFS4ERR_FBIG, -EFBIG },
7478 { NFS4ERR_NOSPC, -ENOSPC },
7479 { NFS4ERR_ROFS, -EROFS },
7480 { NFS4ERR_MLINK, -EMLINK },
7481 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7482 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7483 { NFS4ERR_DQUOT, -EDQUOT },
7484 { NFS4ERR_STALE, -ESTALE },
7485 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7486 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7487 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7488 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7489 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7490 { NFS4ERR_BADTYPE, -EBADTYPE },
7491 { NFS4ERR_LOCKED, -EAGAIN },
7492 { NFS4ERR_SYMLINK, -ELOOP },
7493 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7494 { NFS4ERR_DEADLOCK, -EDEADLK },
7495 { -1, -EIO }
7496 };
7497
7498 /*
7499 * Convert an NFS error code to a local one.
7500 * This one is used jointly by NFSv2 and NFSv3.
7501 */
7502 static int
7503 nfs4_stat_to_errno(int stat)
7504 {
7505 int i;
7506 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7507 if (nfs_errtbl[i].stat == stat)
7508 return nfs_errtbl[i].errno;
7509 }
7510 if (stat <= 10000 || stat > 10100) {
7511 /* The server is looney tunes. */
7512 return -EREMOTEIO;
7513 }
7514 /* If we cannot translate the error, the recovery routines should
7515 * handle it.
7516 * Note: remaining NFSv4 error codes have values > 10000, so should
7517 * not conflict with native Linux error codes.
7518 */
7519 return -stat;
7520 }
7521
7522 #ifdef CONFIG_NFS_V4_2
7523 #include "nfs42xdr.c"
7524 #endif /* CONFIG_NFS_V4_2 */
7525
7526 #define PROC(proc, argtype, restype) \
7527 [NFSPROC4_CLNT_##proc] = { \
7528 .p_proc = NFSPROC4_COMPOUND, \
7529 .p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \
7530 .p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \
7531 .p_arglen = NFS4_##argtype##_sz, \
7532 .p_replen = NFS4_##restype##_sz, \
7533 .p_statidx = NFSPROC4_CLNT_##proc, \
7534 .p_name = #proc, \
7535 }
7536
7537 #define STUB(proc) \
7538 [NFSPROC4_CLNT_##proc] = { \
7539 .p_name = #proc, \
7540 }
7541
7542 struct rpc_procinfo nfs4_procedures[] = {
7543 PROC(READ, enc_read, dec_read),
7544 PROC(WRITE, enc_write, dec_write),
7545 PROC(COMMIT, enc_commit, dec_commit),
7546 PROC(OPEN, enc_open, dec_open),
7547 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7548 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7549 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7550 PROC(CLOSE, enc_close, dec_close),
7551 PROC(SETATTR, enc_setattr, dec_setattr),
7552 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7553 PROC(RENEW, enc_renew, dec_renew),
7554 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7555 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7556 PROC(LOCK, enc_lock, dec_lock),
7557 PROC(LOCKT, enc_lockt, dec_lockt),
7558 PROC(LOCKU, enc_locku, dec_locku),
7559 PROC(ACCESS, enc_access, dec_access),
7560 PROC(GETATTR, enc_getattr, dec_getattr),
7561 PROC(LOOKUP, enc_lookup, dec_lookup),
7562 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7563 PROC(REMOVE, enc_remove, dec_remove),
7564 PROC(RENAME, enc_rename, dec_rename),
7565 PROC(LINK, enc_link, dec_link),
7566 PROC(SYMLINK, enc_symlink, dec_symlink),
7567 PROC(CREATE, enc_create, dec_create),
7568 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7569 PROC(STATFS, enc_statfs, dec_statfs),
7570 PROC(READLINK, enc_readlink, dec_readlink),
7571 PROC(READDIR, enc_readdir, dec_readdir),
7572 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7573 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7574 PROC(GETACL, enc_getacl, dec_getacl),
7575 PROC(SETACL, enc_setacl, dec_setacl),
7576 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7577 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7578 PROC(SECINFO, enc_secinfo, dec_secinfo),
7579 PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present),
7580 #if defined(CONFIG_NFS_V4_1)
7581 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7582 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
7583 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7584 PROC(SEQUENCE, enc_sequence, dec_sequence),
7585 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7586 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
7587 PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7588 PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
7589 PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7590 PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7591 PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7592 PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7593 PROC(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7594 STUB(GETDEVICELIST),
7595 PROC(BIND_CONN_TO_SESSION,
7596 enc_bind_conn_to_session, dec_bind_conn_to_session),
7597 PROC(DESTROY_CLIENTID, enc_destroy_clientid, dec_destroy_clientid),
7598 #endif /* CONFIG_NFS_V4_1 */
7599 #ifdef CONFIG_NFS_V4_2
7600 PROC(SEEK, enc_seek, dec_seek),
7601 PROC(ALLOCATE, enc_allocate, dec_allocate),
7602 PROC(DEALLOCATE, enc_deallocate, dec_deallocate),
7603 PROC(LAYOUTSTATS, enc_layoutstats, dec_layoutstats),
7604 PROC(CLONE, enc_clone, dec_clone),
7605 PROC(COPY, enc_copy, dec_copy),
7606 #endif /* CONFIG_NFS_V4_2 */
7607 };
7608
7609 const struct rpc_version nfs_version4 = {
7610 .number = 4,
7611 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7612 .procs = nfs4_procedures
7613 };
7614
7615 /*
7616 * Local variables:
7617 * c-basic-offset: 8
7618 * End:
7619 */
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