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Merge tag 'chrome-platform-for-linus-4.13' of git://git.kernel.org/pub/scm/linux...
[linux/fpc-iii.git] / fs / nfs / nfs4xdr.c
blob3aebfdc82b30320625b0011b4f968207e436fb48
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_space_limit_maxsz (3)
173 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
174 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
175 decode_space_limit_maxsz + \
176 decode_ace_maxsz)
177 #define decode_change_info_maxsz (5)
178 #define decode_open_maxsz (op_decode_hdr_maxsz + \
179 decode_stateid_maxsz + \
180 decode_change_info_maxsz + 1 + \
181 nfs4_fattr_bitmap_maxsz + \
182 decode_delegation_maxsz)
183 #define encode_open_confirm_maxsz \
184 (op_encode_hdr_maxsz + \
185 encode_stateid_maxsz + 1)
186 #define decode_open_confirm_maxsz \
187 (op_decode_hdr_maxsz + \
188 decode_stateid_maxsz)
189 #define encode_open_downgrade_maxsz \
190 (op_encode_hdr_maxsz + \
191 encode_stateid_maxsz + 1 + \
192 encode_share_access_maxsz)
193 #define decode_open_downgrade_maxsz \
194 (op_decode_hdr_maxsz + \
195 decode_stateid_maxsz)
196 #define encode_close_maxsz (op_encode_hdr_maxsz + \
197 1 + encode_stateid_maxsz)
198 #define decode_close_maxsz (op_decode_hdr_maxsz + \
199 decode_stateid_maxsz)
200 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
201 encode_stateid_maxsz + \
202 encode_attrs_maxsz)
203 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
204 nfs4_fattr_bitmap_maxsz)
205 #define encode_read_maxsz (op_encode_hdr_maxsz + \
206 encode_stateid_maxsz + 3)
207 #define decode_read_maxsz (op_decode_hdr_maxsz + 2)
208 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
209 2 + encode_verifier_maxsz + 5 + \
210 nfs4_label_maxsz)
211 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
212 decode_verifier_maxsz)
213 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
214 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
215 #define encode_write_maxsz (op_encode_hdr_maxsz + \
216 encode_stateid_maxsz + 4)
217 #define decode_write_maxsz (op_decode_hdr_maxsz + \
218 2 + decode_verifier_maxsz)
219 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
220 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
221 decode_verifier_maxsz)
222 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
223 nfs4_name_maxsz)
224 #define decode_remove_maxsz (op_decode_hdr_maxsz + \
225 decode_change_info_maxsz)
226 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
227 2 * nfs4_name_maxsz)
228 #define decode_rename_maxsz (op_decode_hdr_maxsz + \
229 decode_change_info_maxsz + \
230 decode_change_info_maxsz)
231 #define encode_link_maxsz (op_encode_hdr_maxsz + \
232 nfs4_name_maxsz)
233 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
234 #define encode_lockowner_maxsz (7)
235 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
236 7 + \
237 1 + encode_stateid_maxsz + 1 + \
238 encode_lockowner_maxsz)
239 #define decode_lock_denied_maxsz \
240 (8 + decode_lockowner_maxsz)
241 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
242 decode_lock_denied_maxsz)
243 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
244 encode_lockowner_maxsz)
245 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
246 decode_lock_denied_maxsz)
247 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
248 encode_stateid_maxsz + \
249 4)
250 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
251 decode_stateid_maxsz)
252 #define encode_release_lockowner_maxsz \
253 (op_encode_hdr_maxsz + \
254 encode_lockowner_maxsz)
255 #define decode_release_lockowner_maxsz \
256 (op_decode_hdr_maxsz)
257 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
258 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
259 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
260 1 + nfs4_name_maxsz + \
261 1 + \
262 nfs4_fattr_maxsz)
263 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
264 #define encode_create_maxsz (op_encode_hdr_maxsz + \
265 1 + 2 + nfs4_name_maxsz + \
266 encode_attrs_maxsz)
267 #define decode_create_maxsz (op_decode_hdr_maxsz + \
268 decode_change_info_maxsz + \
269 nfs4_fattr_bitmap_maxsz)
270 #define encode_statfs_maxsz (encode_getattr_maxsz)
271 #define decode_statfs_maxsz (decode_getattr_maxsz)
272 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
273 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
274 #define encode_getacl_maxsz (encode_getattr_maxsz)
275 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
276 nfs4_fattr_bitmap_maxsz + 1)
277 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
278 encode_stateid_maxsz + 3)
279 #define decode_setacl_maxsz (decode_setattr_maxsz)
280 #define encode_fs_locations_maxsz \
281 (encode_getattr_maxsz)
282 #define decode_fs_locations_maxsz \
283 (0)
284 #define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
285 #define decode_secinfo_maxsz (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
286
287 #if defined(CONFIG_NFS_V4_1)
288 #define NFS4_MAX_MACHINE_NAME_LEN (64)
289 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
290 sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
291
292 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
293 encode_verifier_maxsz + \
294 1 /* co_ownerid.len */ + \
295 /* eia_clientowner */ \
296 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
297 1 /* flags */ + \
298 1 /* spa_how */ + \
299 /* max is SP4_MACH_CRED (for now) */ + \
300 1 + NFS4_OP_MAP_NUM_WORDS + \
301 1 + NFS4_OP_MAP_NUM_WORDS + \
302 1 /* implementation id array of size 1 */ + \
303 1 /* nii_domain */ + \
304 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
305 1 /* nii_name */ + \
306 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
307 3 /* nii_date */)
308 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
309 2 /* eir_clientid */ + \
310 1 /* eir_sequenceid */ + \
311 1 /* eir_flags */ + \
312 1 /* spr_how */ + \
313 /* max is SP4_MACH_CRED (for now) */ + \
314 1 + NFS4_OP_MAP_NUM_WORDS + \
315 1 + NFS4_OP_MAP_NUM_WORDS + \
316 2 /* eir_server_owner.so_minor_id */ + \
317 /* eir_server_owner.so_major_id<> */ \
318 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
319 /* eir_server_scope<> */ \
320 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
321 1 /* eir_server_impl_id array length */ + \
322 1 /* nii_domain */ + \
323 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
324 1 /* nii_name */ + \
325 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
326 3 /* nii_date */)
327 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
328 #define decode_channel_attrs_maxsz (6 + \
329 1 /* ca_rdma_ird.len */ + \
330 1 /* ca_rdma_ird */)
331 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \
332 2 /* csa_clientid */ + \
333 1 /* csa_sequence */ + \
334 1 /* csa_flags */ + \
335 encode_channel_attrs_maxsz + \
336 encode_channel_attrs_maxsz + \
337 1 /* csa_cb_program */ + \
338 1 /* csa_sec_parms.len (1) */ + \
339 1 /* cb_secflavor (AUTH_SYS) */ + \
340 1 /* stamp */ + \
341 1 /* machinename.len */ + \
342 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
343 1 /* uid */ + \
344 1 /* gid */ + \
345 1 /* gids.len (0) */)
346 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \
347 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
348 1 /* csr_sequence */ + \
349 1 /* csr_flags */ + \
350 decode_channel_attrs_maxsz + \
351 decode_channel_attrs_maxsz)
352 #define encode_bind_conn_to_session_maxsz (op_encode_hdr_maxsz + \
353 /* bctsa_sessid */ \
354 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
355 1 /* bctsa_dir */ + \
356 1 /* bctsa_use_conn_in_rdma_mode */)
357 #define decode_bind_conn_to_session_maxsz (op_decode_hdr_maxsz + \
358 /* bctsr_sessid */ \
359 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
360 1 /* bctsr_dir */ + \
361 1 /* bctsr_use_conn_in_rdma_mode */)
362 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
363 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
364 #define encode_destroy_clientid_maxsz (op_encode_hdr_maxsz + 2)
365 #define decode_destroy_clientid_maxsz (op_decode_hdr_maxsz)
366 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \
367 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
368 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \
369 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
370 #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
371 #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
372 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
373 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
374 1 /* layout type */ + \
375 1 /* maxcount */ + \
376 1 /* bitmap size */ + \
377 1 /* notification bitmap length */ + \
378 1 /* notification bitmap, word 0 */)
379 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
380 1 /* layout type */ + \
381 1 /* opaque devaddr4 length */ + \
382 /* devaddr4 payload is read into page */ \
383 1 /* notification bitmap length */ + \
384 1 /* notification bitmap, word 0 */)
385 #define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
386 encode_stateid_maxsz)
387 #define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
388 decode_stateid_maxsz + \
389 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
390 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
391 2 /* offset */ + \
392 2 /* length */ + \
393 1 /* reclaim */ + \
394 encode_stateid_maxsz + \
395 1 /* new offset (true) */ + \
396 2 /* last byte written */ + \
397 1 /* nt_timechanged (false) */ + \
398 1 /* layoutupdate4 layout type */ + \
399 1 /* layoutupdate4 opaqueue len */)
400 /* the actual content of layoutupdate4 should
401 be allocated by drivers and spliced in
402 using xdr_write_pages */
403 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
404 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
405 encode_stateid_maxsz + \
406 1 + \
407 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
408 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
409 1 + decode_stateid_maxsz)
410 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
411 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
412 #define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \
413 XDR_QUADLEN(NFS4_STATEID_SIZE))
414 #define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1)
415 #define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \
416 XDR_QUADLEN(NFS4_STATEID_SIZE))
417 #define decode_free_stateid_maxsz (op_decode_hdr_maxsz)
418 #else /* CONFIG_NFS_V4_1 */
419 #define encode_sequence_maxsz 0
420 #define decode_sequence_maxsz 0
421 #define encode_layoutreturn_maxsz 0
422 #define decode_layoutreturn_maxsz 0
423 #endif /* CONFIG_NFS_V4_1 */
424
425 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
426 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
427 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
428 encode_sequence_maxsz + \
429 encode_putfh_maxsz + \
430 encode_read_maxsz)
431 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
432 decode_sequence_maxsz + \
433 decode_putfh_maxsz + \
434 decode_read_maxsz)
435 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
436 encode_sequence_maxsz + \
437 encode_putfh_maxsz + \
438 encode_readlink_maxsz)
439 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
440 decode_sequence_maxsz + \
441 decode_putfh_maxsz + \
442 decode_readlink_maxsz)
443 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
444 encode_sequence_maxsz + \
445 encode_putfh_maxsz + \
446 encode_readdir_maxsz)
447 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
448 decode_sequence_maxsz + \
449 decode_putfh_maxsz + \
450 decode_readdir_maxsz)
451 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
452 encode_sequence_maxsz + \
453 encode_putfh_maxsz + \
454 encode_write_maxsz + \
455 encode_getattr_maxsz)
456 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
457 decode_sequence_maxsz + \
458 decode_putfh_maxsz + \
459 decode_write_maxsz + \
460 decode_getattr_maxsz)
461 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
462 encode_sequence_maxsz + \
463 encode_putfh_maxsz + \
464 encode_commit_maxsz)
465 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
466 decode_sequence_maxsz + \
467 decode_putfh_maxsz + \
468 decode_commit_maxsz)
469 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
470 encode_sequence_maxsz + \
471 encode_putfh_maxsz + \
472 encode_open_maxsz + \
473 encode_access_maxsz + \
474 encode_getfh_maxsz + \
475 encode_getattr_maxsz)
476 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
477 decode_sequence_maxsz + \
478 decode_putfh_maxsz + \
479 decode_open_maxsz + \
480 decode_access_maxsz + \
481 decode_getfh_maxsz + \
482 decode_getattr_maxsz)
483 #define NFS4_enc_open_confirm_sz \
484 (compound_encode_hdr_maxsz + \
485 encode_putfh_maxsz + \
486 encode_open_confirm_maxsz)
487 #define NFS4_dec_open_confirm_sz \
488 (compound_decode_hdr_maxsz + \
489 decode_putfh_maxsz + \
490 decode_open_confirm_maxsz)
491 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
492 encode_sequence_maxsz + \
493 encode_putfh_maxsz + \
494 encode_open_maxsz + \
495 encode_access_maxsz + \
496 encode_getattr_maxsz)
497 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
498 decode_sequence_maxsz + \
499 decode_putfh_maxsz + \
500 decode_open_maxsz + \
501 decode_access_maxsz + \
502 decode_getattr_maxsz)
503 #define NFS4_enc_open_downgrade_sz \
504 (compound_encode_hdr_maxsz + \
505 encode_sequence_maxsz + \
506 encode_putfh_maxsz + \
507 encode_layoutreturn_maxsz + \
508 encode_open_downgrade_maxsz)
509 #define NFS4_dec_open_downgrade_sz \
510 (compound_decode_hdr_maxsz + \
511 decode_sequence_maxsz + \
512 decode_putfh_maxsz + \
513 decode_layoutreturn_maxsz + \
514 decode_open_downgrade_maxsz)
515 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
516 encode_sequence_maxsz + \
517 encode_putfh_maxsz + \
518 encode_layoutreturn_maxsz + \
519 encode_close_maxsz + \
520 encode_getattr_maxsz)
521 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
522 decode_sequence_maxsz + \
523 decode_putfh_maxsz + \
524 decode_layoutreturn_maxsz + \
525 decode_close_maxsz + \
526 decode_getattr_maxsz)
527 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
528 encode_sequence_maxsz + \
529 encode_putfh_maxsz + \
530 encode_setattr_maxsz + \
531 encode_getattr_maxsz)
532 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
533 decode_sequence_maxsz + \
534 decode_putfh_maxsz + \
535 decode_setattr_maxsz + \
536 decode_getattr_maxsz)
537 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
538 encode_sequence_maxsz + \
539 encode_putfh_maxsz + \
540 encode_fsinfo_maxsz)
541 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
542 decode_sequence_maxsz + \
543 decode_putfh_maxsz + \
544 decode_fsinfo_maxsz)
545 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
546 encode_renew_maxsz)
547 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
548 decode_renew_maxsz)
549 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
550 encode_setclientid_maxsz)
551 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
552 decode_setclientid_maxsz)
553 #define NFS4_enc_setclientid_confirm_sz \
554 (compound_encode_hdr_maxsz + \
555 encode_setclientid_confirm_maxsz)
556 #define NFS4_dec_setclientid_confirm_sz \
557 (compound_decode_hdr_maxsz + \
558 decode_setclientid_confirm_maxsz)
559 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
560 encode_sequence_maxsz + \
561 encode_putfh_maxsz + \
562 encode_lock_maxsz)
563 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
564 decode_sequence_maxsz + \
565 decode_putfh_maxsz + \
566 decode_lock_maxsz)
567 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
568 encode_sequence_maxsz + \
569 encode_putfh_maxsz + \
570 encode_lockt_maxsz)
571 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
572 decode_sequence_maxsz + \
573 decode_putfh_maxsz + \
574 decode_lockt_maxsz)
575 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
576 encode_sequence_maxsz + \
577 encode_putfh_maxsz + \
578 encode_locku_maxsz)
579 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
580 decode_sequence_maxsz + \
581 decode_putfh_maxsz + \
582 decode_locku_maxsz)
583 #define NFS4_enc_release_lockowner_sz \
584 (compound_encode_hdr_maxsz + \
585 encode_lockowner_maxsz)
586 #define NFS4_dec_release_lockowner_sz \
587 (compound_decode_hdr_maxsz + \
588 decode_lockowner_maxsz)
589 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
590 encode_sequence_maxsz + \
591 encode_putfh_maxsz + \
592 encode_access_maxsz + \
593 encode_getattr_maxsz)
594 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
595 decode_sequence_maxsz + \
596 decode_putfh_maxsz + \
597 decode_access_maxsz + \
598 decode_getattr_maxsz)
599 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
600 encode_sequence_maxsz + \
601 encode_putfh_maxsz + \
602 encode_getattr_maxsz + \
603 encode_renew_maxsz)
604 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
605 decode_sequence_maxsz + \
606 decode_putfh_maxsz + \
607 decode_getattr_maxsz + \
608 decode_renew_maxsz)
609 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
610 encode_sequence_maxsz + \
611 encode_putfh_maxsz + \
612 encode_lookup_maxsz + \
613 encode_getattr_maxsz + \
614 encode_getfh_maxsz)
615 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
616 decode_sequence_maxsz + \
617 decode_putfh_maxsz + \
618 decode_lookup_maxsz + \
619 decode_getattr_maxsz + \
620 decode_getfh_maxsz)
621 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
622 encode_sequence_maxsz + \
623 encode_putrootfh_maxsz + \
624 encode_getattr_maxsz + \
625 encode_getfh_maxsz)
626 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
627 decode_sequence_maxsz + \
628 decode_putrootfh_maxsz + \
629 decode_getattr_maxsz + \
630 decode_getfh_maxsz)
631 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
632 encode_sequence_maxsz + \
633 encode_putfh_maxsz + \
634 encode_remove_maxsz)
635 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
636 decode_sequence_maxsz + \
637 decode_putfh_maxsz + \
638 decode_remove_maxsz)
639 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
640 encode_sequence_maxsz + \
641 encode_putfh_maxsz + \
642 encode_savefh_maxsz + \
643 encode_putfh_maxsz + \
644 encode_rename_maxsz)
645 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
646 decode_sequence_maxsz + \
647 decode_putfh_maxsz + \
648 decode_savefh_maxsz + \
649 decode_putfh_maxsz + \
650 decode_rename_maxsz)
651 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
652 encode_sequence_maxsz + \
653 encode_putfh_maxsz + \
654 encode_savefh_maxsz + \
655 encode_putfh_maxsz + \
656 encode_link_maxsz + \
657 encode_restorefh_maxsz + \
658 encode_getattr_maxsz)
659 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
660 decode_sequence_maxsz + \
661 decode_putfh_maxsz + \
662 decode_savefh_maxsz + \
663 decode_putfh_maxsz + \
664 decode_link_maxsz + \
665 decode_restorefh_maxsz + \
666 decode_getattr_maxsz)
667 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
668 encode_sequence_maxsz + \
669 encode_putfh_maxsz + \
670 encode_symlink_maxsz + \
671 encode_getattr_maxsz + \
672 encode_getfh_maxsz)
673 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
674 decode_sequence_maxsz + \
675 decode_putfh_maxsz + \
676 decode_symlink_maxsz + \
677 decode_getattr_maxsz + \
678 decode_getfh_maxsz)
679 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
680 encode_sequence_maxsz + \
681 encode_putfh_maxsz + \
682 encode_create_maxsz + \
683 encode_getfh_maxsz + \
684 encode_getattr_maxsz)
685 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
686 decode_sequence_maxsz + \
687 decode_putfh_maxsz + \
688 decode_create_maxsz + \
689 decode_getfh_maxsz + \
690 decode_getattr_maxsz)
691 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
692 encode_sequence_maxsz + \
693 encode_putfh_maxsz + \
694 encode_getattr_maxsz)
695 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
696 decode_sequence_maxsz + \
697 decode_putfh_maxsz + \
698 decode_getattr_maxsz)
699 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
700 encode_sequence_maxsz + \
701 encode_putfh_maxsz + \
702 encode_statfs_maxsz)
703 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
704 decode_sequence_maxsz + \
705 decode_putfh_maxsz + \
706 decode_statfs_maxsz)
707 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
708 encode_sequence_maxsz + \
709 encode_putfh_maxsz + \
710 encode_getattr_maxsz)
711 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
712 decode_sequence_maxsz + \
713 decode_putfh_maxsz + \
714 decode_getattr_maxsz)
715 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
716 encode_sequence_maxsz + \
717 encode_putfh_maxsz + \
718 encode_layoutreturn_maxsz + \
719 encode_delegreturn_maxsz + \
720 encode_getattr_maxsz)
721 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
722 decode_sequence_maxsz + \
723 decode_putfh_maxsz + \
724 decode_layoutreturn_maxsz + \
725 decode_delegreturn_maxsz + \
726 decode_getattr_maxsz)
727 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
728 encode_sequence_maxsz + \
729 encode_putfh_maxsz + \
730 encode_getacl_maxsz)
731 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
732 decode_sequence_maxsz + \
733 decode_putfh_maxsz + \
734 decode_getacl_maxsz)
735 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
736 encode_sequence_maxsz + \
737 encode_putfh_maxsz + \
738 encode_setacl_maxsz)
739 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
740 decode_sequence_maxsz + \
741 decode_putfh_maxsz + \
742 decode_setacl_maxsz)
743 #define NFS4_enc_fs_locations_sz \
744 (compound_encode_hdr_maxsz + \
745 encode_sequence_maxsz + \
746 encode_putfh_maxsz + \
747 encode_lookup_maxsz + \
748 encode_fs_locations_maxsz + \
749 encode_renew_maxsz)
750 #define NFS4_dec_fs_locations_sz \
751 (compound_decode_hdr_maxsz + \
752 decode_sequence_maxsz + \
753 decode_putfh_maxsz + \
754 decode_lookup_maxsz + \
755 decode_fs_locations_maxsz + \
756 decode_renew_maxsz)
757 #define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
758 encode_sequence_maxsz + \
759 encode_putfh_maxsz + \
760 encode_secinfo_maxsz)
761 #define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
762 decode_sequence_maxsz + \
763 decode_putfh_maxsz + \
764 decode_secinfo_maxsz)
765 #define NFS4_enc_fsid_present_sz \
766 (compound_encode_hdr_maxsz + \
767 encode_sequence_maxsz + \
768 encode_putfh_maxsz + \
769 encode_getfh_maxsz + \
770 encode_renew_maxsz)
771 #define NFS4_dec_fsid_present_sz \
772 (compound_decode_hdr_maxsz + \
773 decode_sequence_maxsz + \
774 decode_putfh_maxsz + \
775 decode_getfh_maxsz + \
776 decode_renew_maxsz)
777 #if defined(CONFIG_NFS_V4_1)
778 #define NFS4_enc_bind_conn_to_session_sz \
779 (compound_encode_hdr_maxsz + \
780 encode_bind_conn_to_session_maxsz)
781 #define NFS4_dec_bind_conn_to_session_sz \
782 (compound_decode_hdr_maxsz + \
783 decode_bind_conn_to_session_maxsz)
784 #define NFS4_enc_exchange_id_sz \
785 (compound_encode_hdr_maxsz + \
786 encode_exchange_id_maxsz)
787 #define NFS4_dec_exchange_id_sz \
788 (compound_decode_hdr_maxsz + \
789 decode_exchange_id_maxsz)
790 #define NFS4_enc_create_session_sz \
791 (compound_encode_hdr_maxsz + \
792 encode_create_session_maxsz)
793 #define NFS4_dec_create_session_sz \
794 (compound_decode_hdr_maxsz + \
795 decode_create_session_maxsz)
796 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
797 encode_destroy_session_maxsz)
798 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
799 decode_destroy_session_maxsz)
800 #define NFS4_enc_destroy_clientid_sz (compound_encode_hdr_maxsz + \
801 encode_destroy_clientid_maxsz)
802 #define NFS4_dec_destroy_clientid_sz (compound_decode_hdr_maxsz + \
803 decode_destroy_clientid_maxsz)
804 #define NFS4_enc_sequence_sz \
805 (compound_decode_hdr_maxsz + \
806 encode_sequence_maxsz)
807 #define NFS4_dec_sequence_sz \
808 (compound_decode_hdr_maxsz + \
809 decode_sequence_maxsz)
810 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
811 encode_sequence_maxsz + \
812 encode_putrootfh_maxsz + \
813 encode_fsinfo_maxsz)
814 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
815 decode_sequence_maxsz + \
816 decode_putrootfh_maxsz + \
817 decode_fsinfo_maxsz)
818 #define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
819 encode_sequence_maxsz + \
820 encode_reclaim_complete_maxsz)
821 #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
822 decode_sequence_maxsz + \
823 decode_reclaim_complete_maxsz)
824 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
825 encode_sequence_maxsz +\
826 encode_getdeviceinfo_maxsz)
827 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
828 decode_sequence_maxsz + \
829 decode_getdeviceinfo_maxsz)
830 #define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
831 encode_sequence_maxsz + \
832 encode_putfh_maxsz + \
833 encode_layoutget_maxsz)
834 #define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
835 decode_sequence_maxsz + \
836 decode_putfh_maxsz + \
837 decode_layoutget_maxsz)
838 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
839 encode_sequence_maxsz +\
840 encode_putfh_maxsz + \
841 encode_layoutcommit_maxsz + \
842 encode_getattr_maxsz)
843 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
844 decode_sequence_maxsz + \
845 decode_putfh_maxsz + \
846 decode_layoutcommit_maxsz + \
847 decode_getattr_maxsz)
848 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
849 encode_sequence_maxsz + \
850 encode_putfh_maxsz + \
851 encode_layoutreturn_maxsz)
852 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
853 decode_sequence_maxsz + \
854 decode_putfh_maxsz + \
855 decode_layoutreturn_maxsz)
856 #define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
857 encode_sequence_maxsz + \
858 encode_putrootfh_maxsz +\
859 encode_secinfo_no_name_maxsz)
860 #define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
861 decode_sequence_maxsz + \
862 decode_putrootfh_maxsz + \
863 decode_secinfo_no_name_maxsz)
864 #define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
865 encode_sequence_maxsz + \
866 encode_test_stateid_maxsz)
867 #define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
868 decode_sequence_maxsz + \
869 decode_test_stateid_maxsz)
870 #define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \
871 encode_sequence_maxsz + \
872 encode_free_stateid_maxsz)
873 #define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
874 decode_sequence_maxsz + \
875 decode_free_stateid_maxsz)
876
877 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
878 compound_encode_hdr_maxsz +
879 encode_sequence_maxsz +
880 encode_putfh_maxsz +
881 encode_getattr_maxsz) *
882 XDR_UNIT);
883
884 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
885 compound_decode_hdr_maxsz +
886 decode_sequence_maxsz +
887 decode_putfh_maxsz) *
888 XDR_UNIT);
889
890 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
891 compound_decode_hdr_maxsz +
892 decode_sequence_maxsz) *
893 XDR_UNIT);
894 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
895 #endif /* CONFIG_NFS_V4_1 */
896
897 static const umode_t nfs_type2fmt[] = {
898 [NF4BAD] = 0,
899 [NF4REG] = S_IFREG,
900 [NF4DIR] = S_IFDIR,
901 [NF4BLK] = S_IFBLK,
902 [NF4CHR] = S_IFCHR,
903 [NF4LNK] = S_IFLNK,
904 [NF4SOCK] = S_IFSOCK,
905 [NF4FIFO] = S_IFIFO,
906 [NF4ATTRDIR] = 0,
907 [NF4NAMEDATTR] = 0,
908 };
909
910 struct compound_hdr {
911 int32_t status;
912 uint32_t nops;
913 __be32 * nops_p;
914 uint32_t taglen;
915 char * tag;
916 uint32_t replen; /* expected reply words */
917 u32 minorversion;
918 };
919
920 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
921 {
922 __be32 *p = xdr_reserve_space(xdr, nbytes);
923 BUG_ON(!p);
924 return p;
925 }
926
927 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
928 {
929 WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
930 }
931
932 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
933 {
934 WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0);
935 }
936
937 static void encode_uint32(struct xdr_stream *xdr, u32 n)
938 {
939 WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
940 }
941
942 static void encode_uint64(struct xdr_stream *xdr, u64 n)
943 {
944 WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0);
945 }
946
947 static void encode_nfs4_seqid(struct xdr_stream *xdr,
948 const struct nfs_seqid *seqid)
949 {
950 if (seqid != NULL)
951 encode_uint32(xdr, seqid->sequence->counter);
952 else
953 encode_uint32(xdr, 0);
954 }
955
956 static void encode_compound_hdr(struct xdr_stream *xdr,
957 struct rpc_rqst *req,
958 struct compound_hdr *hdr)
959 {
960 __be32 *p;
961 struct rpc_auth *auth = req->rq_cred->cr_auth;
962
963 /* initialize running count of expected bytes in reply.
964 * NOTE: the replied tag SHOULD be the same is the one sent,
965 * but this is not required as a MUST for the server to do so. */
966 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
967
968 WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
969 encode_string(xdr, hdr->taglen, hdr->tag);
970 p = reserve_space(xdr, 8);
971 *p++ = cpu_to_be32(hdr->minorversion);
972 hdr->nops_p = p;
973 *p = cpu_to_be32(hdr->nops);
974 }
975
976 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
977 uint32_t replen,
978 struct compound_hdr *hdr)
979 {
980 encode_uint32(xdr, op);
981 hdr->nops++;
982 hdr->replen += replen;
983 }
984
985 static void encode_nops(struct compound_hdr *hdr)
986 {
987 WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
988 *hdr->nops_p = htonl(hdr->nops);
989 }
990
991 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
992 {
993 encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
994 }
995
996 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
997 {
998 encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
999 }
1000
1001 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1002 const struct nfs4_label *label,
1003 const umode_t *umask,
1004 const struct nfs_server *server,
1005 const uint32_t attrmask[])
1006 {
1007 char owner_name[IDMAP_NAMESZ];
1008 char owner_group[IDMAP_NAMESZ];
1009 int owner_namelen = 0;
1010 int owner_grouplen = 0;
1011 __be32 *p;
1012 unsigned i;
1013 uint32_t len = 0;
1014 uint32_t bmval_len;
1015 uint32_t bmval[3] = { 0 };
1016
1017 /*
1018 * We reserve enough space to write the entire attribute buffer at once.
1019 */
1020 if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1021 bmval[0] |= FATTR4_WORD0_SIZE;
1022 len += 8;
1023 }
1024 if (iap->ia_valid & ATTR_MODE) {
1025 if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1026 bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1027 len += 8;
1028 } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1029 bmval[1] |= FATTR4_WORD1_MODE;
1030 len += 4;
1031 }
1032 }
1033 if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1034 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1035 if (owner_namelen < 0) {
1036 dprintk("nfs: couldn't resolve uid %d to string\n",
1037 from_kuid(&init_user_ns, iap->ia_uid));
1038 /* XXX */
1039 strcpy(owner_name, "nobody");
1040 owner_namelen = sizeof("nobody") - 1;
1041 /* goto out; */
1042 }
1043 bmval[1] |= FATTR4_WORD1_OWNER;
1044 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1045 }
1046 if ((iap->ia_valid & ATTR_GID) &&
1047 (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1048 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1049 if (owner_grouplen < 0) {
1050 dprintk("nfs: couldn't resolve gid %d to string\n",
1051 from_kgid(&init_user_ns, iap->ia_gid));
1052 strcpy(owner_group, "nobody");
1053 owner_grouplen = sizeof("nobody") - 1;
1054 /* goto out; */
1055 }
1056 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1057 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1058 }
1059 if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1060 if (iap->ia_valid & ATTR_ATIME_SET) {
1061 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1062 len += 16;
1063 } else if (iap->ia_valid & ATTR_ATIME) {
1064 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1065 len += 4;
1066 }
1067 }
1068 if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1069 if (iap->ia_valid & ATTR_MTIME_SET) {
1070 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1071 len += 16;
1072 } else if (iap->ia_valid & ATTR_MTIME) {
1073 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1074 len += 4;
1075 }
1076 }
1077
1078 if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1079 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1080 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1081 }
1082
1083 if (bmval[2] != 0)
1084 bmval_len = 3;
1085 else if (bmval[1] != 0)
1086 bmval_len = 2;
1087 else
1088 bmval_len = 1;
1089
1090 p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1091
1092 *p++ = cpu_to_be32(bmval_len);
1093 for (i = 0; i < bmval_len; i++)
1094 *p++ = cpu_to_be32(bmval[i]);
1095 *p++ = cpu_to_be32(len);
1096
1097 if (bmval[0] & FATTR4_WORD0_SIZE)
1098 p = xdr_encode_hyper(p, iap->ia_size);
1099 if (bmval[1] & FATTR4_WORD1_MODE)
1100 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1101 if (bmval[1] & FATTR4_WORD1_OWNER)
1102 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1103 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1104 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1105 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1106 if (iap->ia_valid & ATTR_ATIME_SET) {
1107 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1108 p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1109 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1110 } else
1111 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1112 }
1113 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1114 if (iap->ia_valid & ATTR_MTIME_SET) {
1115 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1116 p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1117 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1118 } else
1119 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1120 }
1121 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1122 *p++ = cpu_to_be32(label->lfs);
1123 *p++ = cpu_to_be32(label->pi);
1124 *p++ = cpu_to_be32(label->len);
1125 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1126 }
1127 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1128 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1129 *p++ = cpu_to_be32(*umask);
1130 }
1131
1132 /* out: */
1133 }
1134
1135 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1136 {
1137 encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1138 encode_uint32(xdr, access);
1139 }
1140
1141 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1142 {
1143 encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1144 encode_nfs4_seqid(xdr, arg->seqid);
1145 encode_nfs4_stateid(xdr, &arg->stateid);
1146 }
1147
1148 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1149 {
1150 __be32 *p;
1151
1152 encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1153 p = reserve_space(xdr, 12);
1154 p = xdr_encode_hyper(p, args->offset);
1155 *p = cpu_to_be32(args->count);
1156 }
1157
1158 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1159 {
1160 __be32 *p;
1161
1162 encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1163 encode_uint32(xdr, create->ftype);
1164
1165 switch (create->ftype) {
1166 case NF4LNK:
1167 p = reserve_space(xdr, 4);
1168 *p = cpu_to_be32(create->u.symlink.len);
1169 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1170 create->u.symlink.len);
1171 xdr->buf->flags |= XDRBUF_WRITE;
1172 break;
1173
1174 case NF4BLK: case NF4CHR:
1175 p = reserve_space(xdr, 8);
1176 *p++ = cpu_to_be32(create->u.device.specdata1);
1177 *p = cpu_to_be32(create->u.device.specdata2);
1178 break;
1179
1180 default:
1181 break;
1182 }
1183
1184 encode_string(xdr, create->name->len, create->name->name);
1185 encode_attrs(xdr, create->attrs, create->label, &create->umask,
1186 create->server, create->server->attr_bitmask);
1187 }
1188
1189 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1190 {
1191 __be32 *p;
1192
1193 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1194 p = reserve_space(xdr, 8);
1195 *p++ = cpu_to_be32(1);
1196 *p = cpu_to_be32(bitmap);
1197 }
1198
1199 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1200 {
1201 __be32 *p;
1202
1203 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1204 p = reserve_space(xdr, 12);
1205 *p++ = cpu_to_be32(2);
1206 *p++ = cpu_to_be32(bm0);
1207 *p = cpu_to_be32(bm1);
1208 }
1209
1210 static void
1211 encode_getattr_three(struct xdr_stream *xdr,
1212 uint32_t bm0, uint32_t bm1, uint32_t bm2,
1213 struct compound_hdr *hdr)
1214 {
1215 __be32 *p;
1216
1217 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1218 if (bm2) {
1219 p = reserve_space(xdr, 16);
1220 *p++ = cpu_to_be32(3);
1221 *p++ = cpu_to_be32(bm0);
1222 *p++ = cpu_to_be32(bm1);
1223 *p = cpu_to_be32(bm2);
1224 } else if (bm1) {
1225 p = reserve_space(xdr, 12);
1226 *p++ = cpu_to_be32(2);
1227 *p++ = cpu_to_be32(bm0);
1228 *p = cpu_to_be32(bm1);
1229 } else {
1230 p = reserve_space(xdr, 8);
1231 *p++ = cpu_to_be32(1);
1232 *p = cpu_to_be32(bm0);
1233 }
1234 }
1235
1236 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1237 {
1238 encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1239 bitmask[1] & nfs4_fattr_bitmap[1],
1240 bitmask[2] & nfs4_fattr_bitmap[2],
1241 hdr);
1242 }
1243
1244 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1245 const u32 *open_bitmap,
1246 struct compound_hdr *hdr)
1247 {
1248 encode_getattr_three(xdr,
1249 bitmask[0] & open_bitmap[0],
1250 bitmask[1] & open_bitmap[1],
1251 bitmask[2] & open_bitmap[2],
1252 hdr);
1253 }
1254
1255 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1256 {
1257 encode_getattr_three(xdr,
1258 bitmask[0] & nfs4_fsinfo_bitmap[0],
1259 bitmask[1] & nfs4_fsinfo_bitmap[1],
1260 bitmask[2] & nfs4_fsinfo_bitmap[2],
1261 hdr);
1262 }
1263
1264 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1265 {
1266 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1267 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1268 }
1269
1270 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1271 {
1272 encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1273 }
1274
1275 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1276 {
1277 encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1278 encode_string(xdr, name->len, name->name);
1279 }
1280
1281 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1282 {
1283 if (fl->fl_type == F_RDLCK)
1284 return block ? NFS4_READW_LT : NFS4_READ_LT;
1285 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1286 }
1287
1288 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1289 {
1290 if (fl->fl_end == OFFSET_MAX)
1291 return ~(uint64_t)0;
1292 return fl->fl_end - fl->fl_start + 1;
1293 }
1294
1295 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1296 {
1297 __be32 *p;
1298
1299 p = reserve_space(xdr, 32);
1300 p = xdr_encode_hyper(p, lowner->clientid);
1301 *p++ = cpu_to_be32(20);
1302 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1303 *p++ = cpu_to_be32(lowner->s_dev);
1304 xdr_encode_hyper(p, lowner->id);
1305 }
1306
1307 /*
1308 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1309 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1310 */
1311 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1312 {
1313 __be32 *p;
1314
1315 encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1316 p = reserve_space(xdr, 28);
1317 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1318 *p++ = cpu_to_be32(args->reclaim);
1319 p = xdr_encode_hyper(p, args->fl->fl_start);
1320 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1321 *p = cpu_to_be32(args->new_lock_owner);
1322 if (args->new_lock_owner){
1323 encode_nfs4_seqid(xdr, args->open_seqid);
1324 encode_nfs4_stateid(xdr, &args->open_stateid);
1325 encode_nfs4_seqid(xdr, args->lock_seqid);
1326 encode_lockowner(xdr, &args->lock_owner);
1327 }
1328 else {
1329 encode_nfs4_stateid(xdr, &args->lock_stateid);
1330 encode_nfs4_seqid(xdr, args->lock_seqid);
1331 }
1332 }
1333
1334 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1335 {
1336 __be32 *p;
1337
1338 encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1339 p = reserve_space(xdr, 20);
1340 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1341 p = xdr_encode_hyper(p, args->fl->fl_start);
1342 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1343 encode_lockowner(xdr, &args->lock_owner);
1344 }
1345
1346 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1347 {
1348 __be32 *p;
1349
1350 encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1351 encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1352 encode_nfs4_seqid(xdr, args->seqid);
1353 encode_nfs4_stateid(xdr, &args->stateid);
1354 p = reserve_space(xdr, 16);
1355 p = xdr_encode_hyper(p, args->fl->fl_start);
1356 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1357 }
1358
1359 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1360 {
1361 encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1362 encode_lockowner(xdr, lowner);
1363 }
1364
1365 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1366 {
1367 encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1368 encode_string(xdr, name->len, name->name);
1369 }
1370
1371 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1372 {
1373 __be32 *p;
1374
1375 p = reserve_space(xdr, 8);
1376 *p++ = cpu_to_be32(share_access);
1377 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1378 }
1379
1380 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1381 {
1382 __be32 *p;
1383 /*
1384 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1385 * owner 4 = 32
1386 */
1387 encode_nfs4_seqid(xdr, arg->seqid);
1388 encode_share_access(xdr, arg->share_access);
1389 p = reserve_space(xdr, 36);
1390 p = xdr_encode_hyper(p, arg->clientid);
1391 *p++ = cpu_to_be32(24);
1392 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1393 *p++ = cpu_to_be32(arg->server->s_dev);
1394 *p++ = cpu_to_be32(arg->id.uniquifier);
1395 xdr_encode_hyper(p, arg->id.create_time);
1396 }
1397
1398 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1399 {
1400 __be32 *p;
1401
1402 p = reserve_space(xdr, 4);
1403 switch(arg->createmode) {
1404 case NFS4_CREATE_UNCHECKED:
1405 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1406 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1407 arg->server, arg->server->attr_bitmask);
1408 break;
1409 case NFS4_CREATE_GUARDED:
1410 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1411 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1412 arg->server, arg->server->attr_bitmask);
1413 break;
1414 case NFS4_CREATE_EXCLUSIVE:
1415 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1416 encode_nfs4_verifier(xdr, &arg->u.verifier);
1417 break;
1418 case NFS4_CREATE_EXCLUSIVE4_1:
1419 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1420 encode_nfs4_verifier(xdr, &arg->u.verifier);
1421 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1422 arg->server, arg->server->exclcreat_bitmask);
1423 }
1424 }
1425
1426 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1427 {
1428 __be32 *p;
1429
1430 p = reserve_space(xdr, 4);
1431 switch (arg->open_flags & O_CREAT) {
1432 case 0:
1433 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1434 break;
1435 default:
1436 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1437 encode_createmode(xdr, arg);
1438 }
1439 }
1440
1441 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1442 {
1443 __be32 *p;
1444
1445 p = reserve_space(xdr, 4);
1446 switch (delegation_type) {
1447 case 0:
1448 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1449 break;
1450 case FMODE_READ:
1451 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1452 break;
1453 case FMODE_WRITE|FMODE_READ:
1454 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1455 break;
1456 default:
1457 BUG();
1458 }
1459 }
1460
1461 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1462 {
1463 __be32 *p;
1464
1465 p = reserve_space(xdr, 4);
1466 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1467 encode_string(xdr, name->len, name->name);
1468 }
1469
1470 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1471 {
1472 __be32 *p;
1473
1474 p = reserve_space(xdr, 4);
1475 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1476 encode_delegation_type(xdr, type);
1477 }
1478
1479 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1480 {
1481 __be32 *p;
1482
1483 p = reserve_space(xdr, 4);
1484 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1485 encode_nfs4_stateid(xdr, stateid);
1486 encode_string(xdr, name->len, name->name);
1487 }
1488
1489 static inline void encode_claim_fh(struct xdr_stream *xdr)
1490 {
1491 __be32 *p;
1492
1493 p = reserve_space(xdr, 4);
1494 *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1495 }
1496
1497 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1498 {
1499 __be32 *p;
1500
1501 p = reserve_space(xdr, 4);
1502 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1503 encode_nfs4_stateid(xdr, stateid);
1504 }
1505
1506 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1507 {
1508 encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1509 encode_openhdr(xdr, arg);
1510 encode_opentype(xdr, arg);
1511 switch (arg->claim) {
1512 case NFS4_OPEN_CLAIM_NULL:
1513 encode_claim_null(xdr, arg->name);
1514 break;
1515 case NFS4_OPEN_CLAIM_PREVIOUS:
1516 encode_claim_previous(xdr, arg->u.delegation_type);
1517 break;
1518 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1519 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1520 break;
1521 case NFS4_OPEN_CLAIM_FH:
1522 encode_claim_fh(xdr);
1523 break;
1524 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1525 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1526 break;
1527 default:
1528 BUG();
1529 }
1530 }
1531
1532 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1533 {
1534 encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1535 encode_nfs4_stateid(xdr, arg->stateid);
1536 encode_nfs4_seqid(xdr, arg->seqid);
1537 }
1538
1539 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1540 {
1541 encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1542 encode_nfs4_stateid(xdr, &arg->stateid);
1543 encode_nfs4_seqid(xdr, arg->seqid);
1544 encode_share_access(xdr, arg->share_access);
1545 }
1546
1547 static void
1548 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1549 {
1550 encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1551 encode_string(xdr, fh->size, fh->data);
1552 }
1553
1554 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1555 {
1556 encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1557 }
1558
1559 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1560 struct compound_hdr *hdr)
1561 {
1562 __be32 *p;
1563
1564 encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1565 encode_nfs4_stateid(xdr, &args->stateid);
1566
1567 p = reserve_space(xdr, 12);
1568 p = xdr_encode_hyper(p, args->offset);
1569 *p = cpu_to_be32(args->count);
1570 }
1571
1572 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1573 {
1574 uint32_t attrs[3] = {
1575 FATTR4_WORD0_RDATTR_ERROR,
1576 FATTR4_WORD1_MOUNTED_ON_FILEID,
1577 };
1578 uint32_t dircount = readdir->count >> 1;
1579 __be32 *p, verf[2];
1580 uint32_t attrlen = 0;
1581 unsigned int i;
1582
1583 if (readdir->plus) {
1584 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1585 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1586 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1587 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1588 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1589 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1590 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1591 dircount >>= 1;
1592 }
1593 /* Use mounted_on_fileid only if the server supports it */
1594 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1595 attrs[0] |= FATTR4_WORD0_FILEID;
1596 for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1597 attrs[i] &= readdir->bitmask[i];
1598 if (attrs[i] != 0)
1599 attrlen = i+1;
1600 }
1601
1602 encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1603 encode_uint64(xdr, readdir->cookie);
1604 encode_nfs4_verifier(xdr, &readdir->verifier);
1605 p = reserve_space(xdr, 12 + (attrlen << 2));
1606 *p++ = cpu_to_be32(dircount);
1607 *p++ = cpu_to_be32(readdir->count);
1608 *p++ = cpu_to_be32(attrlen);
1609 for (i = 0; i < attrlen; i++)
1610 *p++ = cpu_to_be32(attrs[i]);
1611 memcpy(verf, readdir->verifier.data, sizeof(verf));
1612
1613 dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1614 __func__,
1615 (unsigned long long)readdir->cookie,
1616 verf[0], verf[1],
1617 attrs[0] & readdir->bitmask[0],
1618 attrs[1] & readdir->bitmask[1],
1619 attrs[2] & readdir->bitmask[2]);
1620 }
1621
1622 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1623 {
1624 encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1625 }
1626
1627 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1628 {
1629 encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1630 encode_string(xdr, name->len, name->name);
1631 }
1632
1633 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1634 {
1635 encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1636 encode_string(xdr, oldname->len, oldname->name);
1637 encode_string(xdr, newname->len, newname->name);
1638 }
1639
1640 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1641 struct compound_hdr *hdr)
1642 {
1643 encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1644 encode_uint64(xdr, clid);
1645 }
1646
1647 static void
1648 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1649 {
1650 encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1651 }
1652
1653 static void
1654 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1655 {
1656 __be32 *p;
1657
1658 encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1659 encode_nfs4_stateid(xdr, &zero_stateid);
1660 p = reserve_space(xdr, 2*4);
1661 *p++ = cpu_to_be32(1);
1662 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1663 p = reserve_space(xdr, 4);
1664 *p = cpu_to_be32(arg->acl_len);
1665 xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1666 }
1667
1668 static void
1669 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1670 {
1671 encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1672 }
1673
1674 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1675 {
1676 encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1677 encode_nfs4_stateid(xdr, &arg->stateid);
1678 encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1679 server->attr_bitmask);
1680 }
1681
1682 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1683 {
1684 __be32 *p;
1685
1686 encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1687 encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1688
1689 encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1690 setclientid->sc_clnt->cl_owner_id);
1691 p = reserve_space(xdr, 4);
1692 *p = cpu_to_be32(setclientid->sc_prog);
1693 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1694 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1695 p = reserve_space(xdr, 4);
1696 *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1697 }
1698
1699 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1700 {
1701 encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1702 decode_setclientid_confirm_maxsz, hdr);
1703 encode_uint64(xdr, arg->clientid);
1704 encode_nfs4_verifier(xdr, &arg->confirm);
1705 }
1706
1707 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1708 struct compound_hdr *hdr)
1709 {
1710 __be32 *p;
1711
1712 encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1713 encode_nfs4_stateid(xdr, &args->stateid);
1714
1715 p = reserve_space(xdr, 16);
1716 p = xdr_encode_hyper(p, args->offset);
1717 *p++ = cpu_to_be32(args->stable);
1718 *p = cpu_to_be32(args->count);
1719
1720 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1721 }
1722
1723 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1724 {
1725 encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1726 encode_nfs4_stateid(xdr, stateid);
1727 }
1728
1729 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1730 {
1731 encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1732 encode_string(xdr, name->len, name->name);
1733 }
1734
1735 #if defined(CONFIG_NFS_V4_1)
1736 /* NFSv4.1 operations */
1737 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1738 struct nfs41_bind_conn_to_session_args *args,
1739 struct compound_hdr *hdr)
1740 {
1741 __be32 *p;
1742
1743 encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1744 decode_bind_conn_to_session_maxsz, hdr);
1745 encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1746 p = xdr_reserve_space(xdr, 8);
1747 *p++ = cpu_to_be32(args->dir);
1748 *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1749 }
1750
1751 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1752 {
1753 unsigned int i;
1754 encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1755 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1756 encode_uint32(xdr, op_map->u.words[i]);
1757 }
1758
1759 static void encode_exchange_id(struct xdr_stream *xdr,
1760 struct nfs41_exchange_id_args *args,
1761 struct compound_hdr *hdr)
1762 {
1763 __be32 *p;
1764 char impl_name[IMPL_NAME_LIMIT];
1765 int len = 0;
1766
1767 encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1768 encode_nfs4_verifier(xdr, args->verifier);
1769
1770 encode_string(xdr, strlen(args->client->cl_owner_id),
1771 args->client->cl_owner_id);
1772
1773 encode_uint32(xdr, args->flags);
1774 encode_uint32(xdr, args->state_protect.how);
1775
1776 switch (args->state_protect.how) {
1777 case SP4_NONE:
1778 break;
1779 case SP4_MACH_CRED:
1780 encode_op_map(xdr, &args->state_protect.enforce);
1781 encode_op_map(xdr, &args->state_protect.allow);
1782 break;
1783 default:
1784 WARN_ON_ONCE(1);
1785 break;
1786 }
1787
1788 if (send_implementation_id &&
1789 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1790 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1791 <= sizeof(impl_name) + 1)
1792 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1793 utsname()->sysname, utsname()->release,
1794 utsname()->version, utsname()->machine);
1795
1796 if (len > 0) {
1797 encode_uint32(xdr, 1); /* implementation id array length=1 */
1798
1799 encode_string(xdr,
1800 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1801 CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1802 encode_string(xdr, len, impl_name);
1803 /* just send zeros for nii_date - the date is in nii_name */
1804 p = reserve_space(xdr, 12);
1805 p = xdr_encode_hyper(p, 0);
1806 *p = cpu_to_be32(0);
1807 } else
1808 encode_uint32(xdr, 0); /* implementation id array length=0 */
1809 }
1810
1811 static void encode_create_session(struct xdr_stream *xdr,
1812 struct nfs41_create_session_args *args,
1813 struct compound_hdr *hdr)
1814 {
1815 __be32 *p;
1816 struct nfs_client *clp = args->client;
1817 struct rpc_clnt *clnt = clp->cl_rpcclient;
1818 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1819 u32 max_resp_sz_cached;
1820
1821 /*
1822 * Assumes OPEN is the biggest non-idempotent compound.
1823 * 2 is the verifier.
1824 */
1825 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1826 RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1827
1828 encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1829 p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1830 p = xdr_encode_hyper(p, args->clientid);
1831 *p++ = cpu_to_be32(args->seqid); /*Sequence id */
1832 *p++ = cpu_to_be32(args->flags); /*flags */
1833
1834 /* Fore Channel */
1835 *p++ = cpu_to_be32(0); /* header padding size */
1836 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1837 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1838 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1839 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1840 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1841 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1842
1843 /* Back Channel */
1844 *p++ = cpu_to_be32(0); /* header padding size */
1845 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1846 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1847 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1848 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1849 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1850 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1851
1852 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1853 *p++ = cpu_to_be32(1);
1854 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1855
1856 /* authsys_parms rfc1831 */
1857 *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1858 p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1859 *p++ = cpu_to_be32(0); /* UID */
1860 *p++ = cpu_to_be32(0); /* GID */
1861 *p = cpu_to_be32(0); /* No more gids */
1862 }
1863
1864 static void encode_destroy_session(struct xdr_stream *xdr,
1865 struct nfs4_session *session,
1866 struct compound_hdr *hdr)
1867 {
1868 encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1869 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1870 }
1871
1872 static void encode_destroy_clientid(struct xdr_stream *xdr,
1873 uint64_t clientid,
1874 struct compound_hdr *hdr)
1875 {
1876 encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1877 encode_uint64(xdr, clientid);
1878 }
1879
1880 static void encode_reclaim_complete(struct xdr_stream *xdr,
1881 struct nfs41_reclaim_complete_args *args,
1882 struct compound_hdr *hdr)
1883 {
1884 encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1885 encode_uint32(xdr, args->one_fs);
1886 }
1887 #endif /* CONFIG_NFS_V4_1 */
1888
1889 static void encode_sequence(struct xdr_stream *xdr,
1890 const struct nfs4_sequence_args *args,
1891 struct compound_hdr *hdr)
1892 {
1893 #if defined(CONFIG_NFS_V4_1)
1894 struct nfs4_session *session;
1895 struct nfs4_slot_table *tp;
1896 struct nfs4_slot *slot = args->sa_slot;
1897 __be32 *p;
1898
1899 tp = slot->table;
1900 session = tp->session;
1901 if (!session)
1902 return;
1903
1904 encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1905
1906 /*
1907 * Sessionid + seqid + slotid + max slotid + cache_this
1908 */
1909 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1910 "max_slotid=%d cache_this=%d\n",
1911 __func__,
1912 ((u32 *)session->sess_id.data)[0],
1913 ((u32 *)session->sess_id.data)[1],
1914 ((u32 *)session->sess_id.data)[2],
1915 ((u32 *)session->sess_id.data)[3],
1916 slot->seq_nr, slot->slot_nr,
1917 tp->highest_used_slotid, args->sa_cache_this);
1918 p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1919 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1920 *p++ = cpu_to_be32(slot->seq_nr);
1921 *p++ = cpu_to_be32(slot->slot_nr);
1922 *p++ = cpu_to_be32(tp->highest_used_slotid);
1923 *p = cpu_to_be32(args->sa_cache_this);
1924 #endif /* CONFIG_NFS_V4_1 */
1925 }
1926
1927 #ifdef CONFIG_NFS_V4_1
1928 static void
1929 encode_getdeviceinfo(struct xdr_stream *xdr,
1930 const struct nfs4_getdeviceinfo_args *args,
1931 struct compound_hdr *hdr)
1932 {
1933 __be32 *p;
1934
1935 encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1936 p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1937 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1938 NFS4_DEVICEID4_SIZE);
1939 *p++ = cpu_to_be32(args->pdev->layout_type);
1940 *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */
1941
1942 p = reserve_space(xdr, 4 + 4);
1943 *p++ = cpu_to_be32(1); /* bitmap length */
1944 *p++ = cpu_to_be32(args->notify_types);
1945 }
1946
1947 static void
1948 encode_layoutget(struct xdr_stream *xdr,
1949 const struct nfs4_layoutget_args *args,
1950 struct compound_hdr *hdr)
1951 {
1952 __be32 *p;
1953
1954 encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1955 p = reserve_space(xdr, 36);
1956 *p++ = cpu_to_be32(0); /* Signal layout available */
1957 *p++ = cpu_to_be32(args->type);
1958 *p++ = cpu_to_be32(args->range.iomode);
1959 p = xdr_encode_hyper(p, args->range.offset);
1960 p = xdr_encode_hyper(p, args->range.length);
1961 p = xdr_encode_hyper(p, args->minlength);
1962 encode_nfs4_stateid(xdr, &args->stateid);
1963 encode_uint32(xdr, args->maxcount);
1964
1965 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1966 __func__,
1967 args->type,
1968 args->range.iomode,
1969 (unsigned long)args->range.offset,
1970 (unsigned long)args->range.length,
1971 args->maxcount);
1972 }
1973
1974 static int
1975 encode_layoutcommit(struct xdr_stream *xdr,
1976 struct inode *inode,
1977 struct nfs4_layoutcommit_args *args,
1978 struct compound_hdr *hdr)
1979 {
1980 __be32 *p;
1981
1982 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1983 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1984
1985 encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1986 p = reserve_space(xdr, 20);
1987 /* Only whole file layouts */
1988 p = xdr_encode_hyper(p, 0); /* offset */
1989 p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
1990 *p = cpu_to_be32(0); /* reclaim */
1991 encode_nfs4_stateid(xdr, &args->stateid);
1992 if (args->lastbytewritten != U64_MAX) {
1993 p = reserve_space(xdr, 20);
1994 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1995 p = xdr_encode_hyper(p, args->lastbytewritten);
1996 } else {
1997 p = reserve_space(xdr, 12);
1998 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
1999 }
2000 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2001 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2002
2003 encode_uint32(xdr, args->layoutupdate_len);
2004 if (args->layoutupdate_pages)
2005 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2006 args->layoutupdate_len);
2007
2008 return 0;
2009 }
2010
2011 static void
2012 encode_layoutreturn(struct xdr_stream *xdr,
2013 const struct nfs4_layoutreturn_args *args,
2014 struct compound_hdr *hdr)
2015 {
2016 __be32 *p;
2017
2018 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2019 p = reserve_space(xdr, 16);
2020 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
2021 *p++ = cpu_to_be32(args->layout_type);
2022 *p++ = cpu_to_be32(args->range.iomode);
2023 *p = cpu_to_be32(RETURN_FILE);
2024 p = reserve_space(xdr, 16);
2025 p = xdr_encode_hyper(p, args->range.offset);
2026 p = xdr_encode_hyper(p, args->range.length);
2027 spin_lock(&args->inode->i_lock);
2028 encode_nfs4_stateid(xdr, &args->stateid);
2029 spin_unlock(&args->inode->i_lock);
2030 if (args->ld_private->ops && args->ld_private->ops->encode)
2031 args->ld_private->ops->encode(xdr, args, args->ld_private);
2032 else
2033 encode_uint32(xdr, 0);
2034 }
2035
2036 static int
2037 encode_secinfo_no_name(struct xdr_stream *xdr,
2038 const struct nfs41_secinfo_no_name_args *args,
2039 struct compound_hdr *hdr)
2040 {
2041 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2042 encode_uint32(xdr, args->style);
2043 return 0;
2044 }
2045
2046 static void encode_test_stateid(struct xdr_stream *xdr,
2047 struct nfs41_test_stateid_args *args,
2048 struct compound_hdr *hdr)
2049 {
2050 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2051 encode_uint32(xdr, 1);
2052 encode_nfs4_stateid(xdr, args->stateid);
2053 }
2054
2055 static void encode_free_stateid(struct xdr_stream *xdr,
2056 struct nfs41_free_stateid_args *args,
2057 struct compound_hdr *hdr)
2058 {
2059 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2060 encode_nfs4_stateid(xdr, &args->stateid);
2061 }
2062 #else
2063 static inline void
2064 encode_layoutreturn(struct xdr_stream *xdr,
2065 const struct nfs4_layoutreturn_args *args,
2066 struct compound_hdr *hdr)
2067 {
2068 }
2069 #endif /* CONFIG_NFS_V4_1 */
2070
2071 /*
2072 * END OF "GENERIC" ENCODE ROUTINES.
2073 */
2074
2075 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2076 {
2077 #if defined(CONFIG_NFS_V4_1)
2078 struct nfs4_session *session = args->sa_slot->table->session;
2079 if (session)
2080 return session->clp->cl_mvops->minor_version;
2081 #endif /* CONFIG_NFS_V4_1 */
2082 return 0;
2083 }
2084
2085 /*
2086 * Encode an ACCESS request
2087 */
2088 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2089 const struct nfs4_accessargs *args)
2090 {
2091 struct compound_hdr hdr = {
2092 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2093 };
2094
2095 encode_compound_hdr(xdr, req, &hdr);
2096 encode_sequence(xdr, &args->seq_args, &hdr);
2097 encode_putfh(xdr, args->fh, &hdr);
2098 encode_access(xdr, args->access, &hdr);
2099 encode_getfattr(xdr, args->bitmask, &hdr);
2100 encode_nops(&hdr);
2101 }
2102
2103 /*
2104 * Encode LOOKUP request
2105 */
2106 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2107 const struct nfs4_lookup_arg *args)
2108 {
2109 struct compound_hdr hdr = {
2110 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2111 };
2112
2113 encode_compound_hdr(xdr, req, &hdr);
2114 encode_sequence(xdr, &args->seq_args, &hdr);
2115 encode_putfh(xdr, args->dir_fh, &hdr);
2116 encode_lookup(xdr, args->name, &hdr);
2117 encode_getfh(xdr, &hdr);
2118 encode_getfattr(xdr, args->bitmask, &hdr);
2119 encode_nops(&hdr);
2120 }
2121
2122 /*
2123 * Encode LOOKUP_ROOT request
2124 */
2125 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2126 struct xdr_stream *xdr,
2127 const struct nfs4_lookup_root_arg *args)
2128 {
2129 struct compound_hdr hdr = {
2130 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2131 };
2132
2133 encode_compound_hdr(xdr, req, &hdr);
2134 encode_sequence(xdr, &args->seq_args, &hdr);
2135 encode_putrootfh(xdr, &hdr);
2136 encode_getfh(xdr, &hdr);
2137 encode_getfattr(xdr, args->bitmask, &hdr);
2138 encode_nops(&hdr);
2139 }
2140
2141 /*
2142 * Encode REMOVE request
2143 */
2144 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2145 const struct nfs_removeargs *args)
2146 {
2147 struct compound_hdr hdr = {
2148 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2149 };
2150
2151 encode_compound_hdr(xdr, req, &hdr);
2152 encode_sequence(xdr, &args->seq_args, &hdr);
2153 encode_putfh(xdr, args->fh, &hdr);
2154 encode_remove(xdr, &args->name, &hdr);
2155 encode_nops(&hdr);
2156 }
2157
2158 /*
2159 * Encode RENAME request
2160 */
2161 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2162 const struct nfs_renameargs *args)
2163 {
2164 struct compound_hdr hdr = {
2165 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2166 };
2167
2168 encode_compound_hdr(xdr, req, &hdr);
2169 encode_sequence(xdr, &args->seq_args, &hdr);
2170 encode_putfh(xdr, args->old_dir, &hdr);
2171 encode_savefh(xdr, &hdr);
2172 encode_putfh(xdr, args->new_dir, &hdr);
2173 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2174 encode_nops(&hdr);
2175 }
2176
2177 /*
2178 * Encode LINK request
2179 */
2180 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2181 const struct nfs4_link_arg *args)
2182 {
2183 struct compound_hdr hdr = {
2184 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2185 };
2186
2187 encode_compound_hdr(xdr, req, &hdr);
2188 encode_sequence(xdr, &args->seq_args, &hdr);
2189 encode_putfh(xdr, args->fh, &hdr);
2190 encode_savefh(xdr, &hdr);
2191 encode_putfh(xdr, args->dir_fh, &hdr);
2192 encode_link(xdr, args->name, &hdr);
2193 encode_restorefh(xdr, &hdr);
2194 encode_getfattr(xdr, args->bitmask, &hdr);
2195 encode_nops(&hdr);
2196 }
2197
2198 /*
2199 * Encode CREATE request
2200 */
2201 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2202 const struct nfs4_create_arg *args)
2203 {
2204 struct compound_hdr hdr = {
2205 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2206 };
2207
2208 encode_compound_hdr(xdr, req, &hdr);
2209 encode_sequence(xdr, &args->seq_args, &hdr);
2210 encode_putfh(xdr, args->dir_fh, &hdr);
2211 encode_create(xdr, args, &hdr);
2212 encode_getfh(xdr, &hdr);
2213 encode_getfattr(xdr, args->bitmask, &hdr);
2214 encode_nops(&hdr);
2215 }
2216
2217 /*
2218 * Encode SYMLINK request
2219 */
2220 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2221 const struct nfs4_create_arg *args)
2222 {
2223 nfs4_xdr_enc_create(req, xdr, args);
2224 }
2225
2226 /*
2227 * Encode GETATTR request
2228 */
2229 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2230 const struct nfs4_getattr_arg *args)
2231 {
2232 struct compound_hdr hdr = {
2233 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2234 };
2235
2236 encode_compound_hdr(xdr, req, &hdr);
2237 encode_sequence(xdr, &args->seq_args, &hdr);
2238 encode_putfh(xdr, args->fh, &hdr);
2239 encode_getfattr(xdr, args->bitmask, &hdr);
2240 encode_nops(&hdr);
2241 }
2242
2243 /*
2244 * Encode a CLOSE request
2245 */
2246 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2247 struct nfs_closeargs *args)
2248 {
2249 struct compound_hdr hdr = {
2250 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2251 };
2252
2253 encode_compound_hdr(xdr, req, &hdr);
2254 encode_sequence(xdr, &args->seq_args, &hdr);
2255 encode_putfh(xdr, args->fh, &hdr);
2256 if (args->lr_args)
2257 encode_layoutreturn(xdr, args->lr_args, &hdr);
2258 if (args->bitmask != NULL)
2259 encode_getfattr(xdr, args->bitmask, &hdr);
2260 encode_close(xdr, args, &hdr);
2261 encode_nops(&hdr);
2262 }
2263
2264 /*
2265 * Encode an OPEN request
2266 */
2267 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2268 struct nfs_openargs *args)
2269 {
2270 struct compound_hdr hdr = {
2271 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2272 };
2273
2274 encode_compound_hdr(xdr, req, &hdr);
2275 encode_sequence(xdr, &args->seq_args, &hdr);
2276 encode_putfh(xdr, args->fh, &hdr);
2277 encode_open(xdr, args, &hdr);
2278 encode_getfh(xdr, &hdr);
2279 if (args->access)
2280 encode_access(xdr, args->access, &hdr);
2281 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2282 encode_nops(&hdr);
2283 }
2284
2285 /*
2286 * Encode an OPEN_CONFIRM request
2287 */
2288 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2289 struct xdr_stream *xdr,
2290 struct nfs_open_confirmargs *args)
2291 {
2292 struct compound_hdr hdr = {
2293 .nops = 0,
2294 };
2295
2296 encode_compound_hdr(xdr, req, &hdr);
2297 encode_putfh(xdr, args->fh, &hdr);
2298 encode_open_confirm(xdr, args, &hdr);
2299 encode_nops(&hdr);
2300 }
2301
2302 /*
2303 * Encode an OPEN request with no attributes.
2304 */
2305 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2306 struct xdr_stream *xdr,
2307 struct nfs_openargs *args)
2308 {
2309 struct compound_hdr hdr = {
2310 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2311 };
2312
2313 encode_compound_hdr(xdr, req, &hdr);
2314 encode_sequence(xdr, &args->seq_args, &hdr);
2315 encode_putfh(xdr, args->fh, &hdr);
2316 encode_open(xdr, args, &hdr);
2317 if (args->access)
2318 encode_access(xdr, args->access, &hdr);
2319 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2320 encode_nops(&hdr);
2321 }
2322
2323 /*
2324 * Encode an OPEN_DOWNGRADE request
2325 */
2326 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2327 struct xdr_stream *xdr,
2328 struct nfs_closeargs *args)
2329 {
2330 struct compound_hdr hdr = {
2331 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2332 };
2333
2334 encode_compound_hdr(xdr, req, &hdr);
2335 encode_sequence(xdr, &args->seq_args, &hdr);
2336 encode_putfh(xdr, args->fh, &hdr);
2337 if (args->lr_args)
2338 encode_layoutreturn(xdr, args->lr_args, &hdr);
2339 encode_open_downgrade(xdr, args, &hdr);
2340 encode_nops(&hdr);
2341 }
2342
2343 /*
2344 * Encode a LOCK request
2345 */
2346 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2347 struct nfs_lock_args *args)
2348 {
2349 struct compound_hdr hdr = {
2350 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2351 };
2352
2353 encode_compound_hdr(xdr, req, &hdr);
2354 encode_sequence(xdr, &args->seq_args, &hdr);
2355 encode_putfh(xdr, args->fh, &hdr);
2356 encode_lock(xdr, args, &hdr);
2357 encode_nops(&hdr);
2358 }
2359
2360 /*
2361 * Encode a LOCKT request
2362 */
2363 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2364 struct nfs_lockt_args *args)
2365 {
2366 struct compound_hdr hdr = {
2367 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2368 };
2369
2370 encode_compound_hdr(xdr, req, &hdr);
2371 encode_sequence(xdr, &args->seq_args, &hdr);
2372 encode_putfh(xdr, args->fh, &hdr);
2373 encode_lockt(xdr, args, &hdr);
2374 encode_nops(&hdr);
2375 }
2376
2377 /*
2378 * Encode a LOCKU request
2379 */
2380 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2381 struct nfs_locku_args *args)
2382 {
2383 struct compound_hdr hdr = {
2384 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2385 };
2386
2387 encode_compound_hdr(xdr, req, &hdr);
2388 encode_sequence(xdr, &args->seq_args, &hdr);
2389 encode_putfh(xdr, args->fh, &hdr);
2390 encode_locku(xdr, args, &hdr);
2391 encode_nops(&hdr);
2392 }
2393
2394 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2395 struct xdr_stream *xdr,
2396 struct nfs_release_lockowner_args *args)
2397 {
2398 struct compound_hdr hdr = {
2399 .minorversion = 0,
2400 };
2401
2402 encode_compound_hdr(xdr, req, &hdr);
2403 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2404 encode_nops(&hdr);
2405 }
2406
2407 /*
2408 * Encode a READLINK request
2409 */
2410 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2411 const struct nfs4_readlink *args)
2412 {
2413 struct compound_hdr hdr = {
2414 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2415 };
2416
2417 encode_compound_hdr(xdr, req, &hdr);
2418 encode_sequence(xdr, &args->seq_args, &hdr);
2419 encode_putfh(xdr, args->fh, &hdr);
2420 encode_readlink(xdr, args, req, &hdr);
2421
2422 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2423 args->pgbase, args->pglen);
2424 encode_nops(&hdr);
2425 }
2426
2427 /*
2428 * Encode a READDIR request
2429 */
2430 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2431 const struct nfs4_readdir_arg *args)
2432 {
2433 struct compound_hdr hdr = {
2434 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2435 };
2436
2437 encode_compound_hdr(xdr, req, &hdr);
2438 encode_sequence(xdr, &args->seq_args, &hdr);
2439 encode_putfh(xdr, args->fh, &hdr);
2440 encode_readdir(xdr, args, req, &hdr);
2441
2442 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2443 args->pgbase, args->count);
2444 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2445 __func__, hdr.replen << 2, args->pages,
2446 args->pgbase, args->count);
2447 encode_nops(&hdr);
2448 }
2449
2450 /*
2451 * Encode a READ request
2452 */
2453 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2454 struct nfs_pgio_args *args)
2455 {
2456 struct compound_hdr hdr = {
2457 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2458 };
2459
2460 encode_compound_hdr(xdr, req, &hdr);
2461 encode_sequence(xdr, &args->seq_args, &hdr);
2462 encode_putfh(xdr, args->fh, &hdr);
2463 encode_read(xdr, args, &hdr);
2464
2465 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2466 args->pages, args->pgbase, args->count);
2467 req->rq_rcv_buf.flags |= XDRBUF_READ;
2468 encode_nops(&hdr);
2469 }
2470
2471 /*
2472 * Encode an SETATTR request
2473 */
2474 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2475 struct nfs_setattrargs *args)
2476 {
2477 struct compound_hdr hdr = {
2478 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2479 };
2480
2481 encode_compound_hdr(xdr, req, &hdr);
2482 encode_sequence(xdr, &args->seq_args, &hdr);
2483 encode_putfh(xdr, args->fh, &hdr);
2484 encode_setattr(xdr, args, args->server, &hdr);
2485 encode_getfattr(xdr, args->bitmask, &hdr);
2486 encode_nops(&hdr);
2487 }
2488
2489 /*
2490 * Encode a GETACL request
2491 */
2492 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2493 struct nfs_getaclargs *args)
2494 {
2495 struct compound_hdr hdr = {
2496 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2497 };
2498 uint32_t replen;
2499
2500 encode_compound_hdr(xdr, req, &hdr);
2501 encode_sequence(xdr, &args->seq_args, &hdr);
2502 encode_putfh(xdr, args->fh, &hdr);
2503 replen = hdr.replen + op_decode_hdr_maxsz;
2504 encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2505
2506 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2507 args->acl_pages, 0, args->acl_len);
2508
2509 encode_nops(&hdr);
2510 }
2511
2512 /*
2513 * Encode a WRITE request
2514 */
2515 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2516 struct nfs_pgio_args *args)
2517 {
2518 struct compound_hdr hdr = {
2519 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2520 };
2521
2522 encode_compound_hdr(xdr, req, &hdr);
2523 encode_sequence(xdr, &args->seq_args, &hdr);
2524 encode_putfh(xdr, args->fh, &hdr);
2525 encode_write(xdr, args, &hdr);
2526 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2527 if (args->bitmask)
2528 encode_getfattr(xdr, args->bitmask, &hdr);
2529 encode_nops(&hdr);
2530 }
2531
2532 /*
2533 * a COMMIT request
2534 */
2535 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2536 struct nfs_commitargs *args)
2537 {
2538 struct compound_hdr hdr = {
2539 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2540 };
2541
2542 encode_compound_hdr(xdr, req, &hdr);
2543 encode_sequence(xdr, &args->seq_args, &hdr);
2544 encode_putfh(xdr, args->fh, &hdr);
2545 encode_commit(xdr, args, &hdr);
2546 encode_nops(&hdr);
2547 }
2548
2549 /*
2550 * FSINFO request
2551 */
2552 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2553 struct nfs4_fsinfo_arg *args)
2554 {
2555 struct compound_hdr hdr = {
2556 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2557 };
2558
2559 encode_compound_hdr(xdr, req, &hdr);
2560 encode_sequence(xdr, &args->seq_args, &hdr);
2561 encode_putfh(xdr, args->fh, &hdr);
2562 encode_fsinfo(xdr, args->bitmask, &hdr);
2563 encode_nops(&hdr);
2564 }
2565
2566 /*
2567 * a PATHCONF request
2568 */
2569 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2570 const struct nfs4_pathconf_arg *args)
2571 {
2572 struct compound_hdr hdr = {
2573 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2574 };
2575
2576 encode_compound_hdr(xdr, req, &hdr);
2577 encode_sequence(xdr, &args->seq_args, &hdr);
2578 encode_putfh(xdr, args->fh, &hdr);
2579 encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2580 &hdr);
2581 encode_nops(&hdr);
2582 }
2583
2584 /*
2585 * a STATFS request
2586 */
2587 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2588 const struct nfs4_statfs_arg *args)
2589 {
2590 struct compound_hdr hdr = {
2591 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2592 };
2593
2594 encode_compound_hdr(xdr, req, &hdr);
2595 encode_sequence(xdr, &args->seq_args, &hdr);
2596 encode_putfh(xdr, args->fh, &hdr);
2597 encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2598 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2599 encode_nops(&hdr);
2600 }
2601
2602 /*
2603 * GETATTR_BITMAP request
2604 */
2605 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2606 struct xdr_stream *xdr,
2607 struct nfs4_server_caps_arg *args)
2608 {
2609 const u32 *bitmask = args->bitmask;
2610 struct compound_hdr hdr = {
2611 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2612 };
2613
2614 encode_compound_hdr(xdr, req, &hdr);
2615 encode_sequence(xdr, &args->seq_args, &hdr);
2616 encode_putfh(xdr, args->fhandle, &hdr);
2617 encode_getattr_three(xdr, bitmask[0], bitmask[1], bitmask[2], &hdr);
2618 encode_nops(&hdr);
2619 }
2620
2621 /*
2622 * a RENEW request
2623 */
2624 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2625 struct nfs_client *clp)
2626 {
2627 struct compound_hdr hdr = {
2628 .nops = 0,
2629 };
2630
2631 encode_compound_hdr(xdr, req, &hdr);
2632 encode_renew(xdr, clp->cl_clientid, &hdr);
2633 encode_nops(&hdr);
2634 }
2635
2636 /*
2637 * a SETCLIENTID request
2638 */
2639 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2640 struct xdr_stream *xdr,
2641 struct nfs4_setclientid *sc)
2642 {
2643 struct compound_hdr hdr = {
2644 .nops = 0,
2645 };
2646
2647 encode_compound_hdr(xdr, req, &hdr);
2648 encode_setclientid(xdr, sc, &hdr);
2649 encode_nops(&hdr);
2650 }
2651
2652 /*
2653 * a SETCLIENTID_CONFIRM request
2654 */
2655 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2656 struct xdr_stream *xdr,
2657 struct nfs4_setclientid_res *arg)
2658 {
2659 struct compound_hdr hdr = {
2660 .nops = 0,
2661 };
2662
2663 encode_compound_hdr(xdr, req, &hdr);
2664 encode_setclientid_confirm(xdr, arg, &hdr);
2665 encode_nops(&hdr);
2666 }
2667
2668 /*
2669 * DELEGRETURN request
2670 */
2671 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2672 struct xdr_stream *xdr,
2673 const struct nfs4_delegreturnargs *args)
2674 {
2675 struct compound_hdr hdr = {
2676 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2677 };
2678
2679 encode_compound_hdr(xdr, req, &hdr);
2680 encode_sequence(xdr, &args->seq_args, &hdr);
2681 encode_putfh(xdr, args->fhandle, &hdr);
2682 if (args->lr_args)
2683 encode_layoutreturn(xdr, args->lr_args, &hdr);
2684 if (args->bitmask)
2685 encode_getfattr(xdr, args->bitmask, &hdr);
2686 encode_delegreturn(xdr, args->stateid, &hdr);
2687 encode_nops(&hdr);
2688 }
2689
2690 /*
2691 * Encode FS_LOCATIONS request
2692 */
2693 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2694 struct xdr_stream *xdr,
2695 struct nfs4_fs_locations_arg *args)
2696 {
2697 struct compound_hdr hdr = {
2698 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2699 };
2700 uint32_t replen;
2701
2702 encode_compound_hdr(xdr, req, &hdr);
2703 encode_sequence(xdr, &args->seq_args, &hdr);
2704 if (args->migration) {
2705 encode_putfh(xdr, args->fh, &hdr);
2706 replen = hdr.replen;
2707 encode_fs_locations(xdr, args->bitmask, &hdr);
2708 if (args->renew)
2709 encode_renew(xdr, args->clientid, &hdr);
2710 } else {
2711 encode_putfh(xdr, args->dir_fh, &hdr);
2712 encode_lookup(xdr, args->name, &hdr);
2713 replen = hdr.replen;
2714 encode_fs_locations(xdr, args->bitmask, &hdr);
2715 }
2716
2717 /* Set up reply kvec to capture returned fs_locations array. */
2718 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2719 0, PAGE_SIZE);
2720 encode_nops(&hdr);
2721 }
2722
2723 /*
2724 * Encode SECINFO request
2725 */
2726 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2727 struct xdr_stream *xdr,
2728 struct nfs4_secinfo_arg *args)
2729 {
2730 struct compound_hdr hdr = {
2731 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2732 };
2733
2734 encode_compound_hdr(xdr, req, &hdr);
2735 encode_sequence(xdr, &args->seq_args, &hdr);
2736 encode_putfh(xdr, args->dir_fh, &hdr);
2737 encode_secinfo(xdr, args->name, &hdr);
2738 encode_nops(&hdr);
2739 }
2740
2741 /*
2742 * Encode FSID_PRESENT request
2743 */
2744 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2745 struct xdr_stream *xdr,
2746 struct nfs4_fsid_present_arg *args)
2747 {
2748 struct compound_hdr hdr = {
2749 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2750 };
2751
2752 encode_compound_hdr(xdr, req, &hdr);
2753 encode_sequence(xdr, &args->seq_args, &hdr);
2754 encode_putfh(xdr, args->fh, &hdr);
2755 encode_getfh(xdr, &hdr);
2756 if (args->renew)
2757 encode_renew(xdr, args->clientid, &hdr);
2758 encode_nops(&hdr);
2759 }
2760
2761 #if defined(CONFIG_NFS_V4_1)
2762 /*
2763 * BIND_CONN_TO_SESSION request
2764 */
2765 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2766 struct xdr_stream *xdr,
2767 struct nfs41_bind_conn_to_session_args *args)
2768 {
2769 struct compound_hdr hdr = {
2770 .minorversion = args->client->cl_mvops->minor_version,
2771 };
2772
2773 encode_compound_hdr(xdr, req, &hdr);
2774 encode_bind_conn_to_session(xdr, args, &hdr);
2775 encode_nops(&hdr);
2776 }
2777
2778 /*
2779 * EXCHANGE_ID request
2780 */
2781 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2782 struct xdr_stream *xdr,
2783 struct nfs41_exchange_id_args *args)
2784 {
2785 struct compound_hdr hdr = {
2786 .minorversion = args->client->cl_mvops->minor_version,
2787 };
2788
2789 encode_compound_hdr(xdr, req, &hdr);
2790 encode_exchange_id(xdr, args, &hdr);
2791 encode_nops(&hdr);
2792 }
2793
2794 /*
2795 * a CREATE_SESSION request
2796 */
2797 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2798 struct xdr_stream *xdr,
2799 struct nfs41_create_session_args *args)
2800 {
2801 struct compound_hdr hdr = {
2802 .minorversion = args->client->cl_mvops->minor_version,
2803 };
2804
2805 encode_compound_hdr(xdr, req, &hdr);
2806 encode_create_session(xdr, args, &hdr);
2807 encode_nops(&hdr);
2808 }
2809
2810 /*
2811 * a DESTROY_SESSION request
2812 */
2813 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2814 struct xdr_stream *xdr,
2815 struct nfs4_session *session)
2816 {
2817 struct compound_hdr hdr = {
2818 .minorversion = session->clp->cl_mvops->minor_version,
2819 };
2820
2821 encode_compound_hdr(xdr, req, &hdr);
2822 encode_destroy_session(xdr, session, &hdr);
2823 encode_nops(&hdr);
2824 }
2825
2826 /*
2827 * a DESTROY_CLIENTID request
2828 */
2829 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2830 struct xdr_stream *xdr,
2831 struct nfs_client *clp)
2832 {
2833 struct compound_hdr hdr = {
2834 .minorversion = clp->cl_mvops->minor_version,
2835 };
2836
2837 encode_compound_hdr(xdr, req, &hdr);
2838 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2839 encode_nops(&hdr);
2840 }
2841
2842 /*
2843 * a SEQUENCE request
2844 */
2845 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2846 struct nfs4_sequence_args *args)
2847 {
2848 struct compound_hdr hdr = {
2849 .minorversion = nfs4_xdr_minorversion(args),
2850 };
2851
2852 encode_compound_hdr(xdr, req, &hdr);
2853 encode_sequence(xdr, args, &hdr);
2854 encode_nops(&hdr);
2855 }
2856
2857 /*
2858 * a GET_LEASE_TIME request
2859 */
2860 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2861 struct xdr_stream *xdr,
2862 struct nfs4_get_lease_time_args *args)
2863 {
2864 struct compound_hdr hdr = {
2865 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2866 };
2867 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2868
2869 encode_compound_hdr(xdr, req, &hdr);
2870 encode_sequence(xdr, &args->la_seq_args, &hdr);
2871 encode_putrootfh(xdr, &hdr);
2872 encode_fsinfo(xdr, lease_bitmap, &hdr);
2873 encode_nops(&hdr);
2874 }
2875
2876 /*
2877 * a RECLAIM_COMPLETE request
2878 */
2879 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2880 struct xdr_stream *xdr,
2881 struct nfs41_reclaim_complete_args *args)
2882 {
2883 struct compound_hdr hdr = {
2884 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2885 };
2886
2887 encode_compound_hdr(xdr, req, &hdr);
2888 encode_sequence(xdr, &args->seq_args, &hdr);
2889 encode_reclaim_complete(xdr, args, &hdr);
2890 encode_nops(&hdr);
2891 }
2892
2893 /*
2894 * Encode GETDEVICEINFO request
2895 */
2896 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2897 struct xdr_stream *xdr,
2898 struct nfs4_getdeviceinfo_args *args)
2899 {
2900 struct compound_hdr hdr = {
2901 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2902 };
2903
2904 encode_compound_hdr(xdr, req, &hdr);
2905 encode_sequence(xdr, &args->seq_args, &hdr);
2906 encode_getdeviceinfo(xdr, args, &hdr);
2907
2908 /* set up reply kvec. Subtract notification bitmap max size (2)
2909 * so that notification bitmap is put in xdr_buf tail */
2910 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2911 args->pdev->pages, args->pdev->pgbase,
2912 args->pdev->pglen);
2913
2914 encode_nops(&hdr);
2915 }
2916
2917 /*
2918 * Encode LAYOUTGET request
2919 */
2920 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2921 struct xdr_stream *xdr,
2922 struct nfs4_layoutget_args *args)
2923 {
2924 struct compound_hdr hdr = {
2925 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2926 };
2927
2928 encode_compound_hdr(xdr, req, &hdr);
2929 encode_sequence(xdr, &args->seq_args, &hdr);
2930 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2931 encode_layoutget(xdr, args, &hdr);
2932
2933 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2934 args->layout.pages, 0, args->layout.pglen);
2935
2936 encode_nops(&hdr);
2937 }
2938
2939 /*
2940 * Encode LAYOUTCOMMIT request
2941 */
2942 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2943 struct xdr_stream *xdr,
2944 struct nfs4_layoutcommit_args *args)
2945 {
2946 struct nfs4_layoutcommit_data *data =
2947 container_of(args, struct nfs4_layoutcommit_data, args);
2948 struct compound_hdr hdr = {
2949 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2950 };
2951
2952 encode_compound_hdr(xdr, req, &hdr);
2953 encode_sequence(xdr, &args->seq_args, &hdr);
2954 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2955 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2956 encode_getfattr(xdr, args->bitmask, &hdr);
2957 encode_nops(&hdr);
2958 }
2959
2960 /*
2961 * Encode LAYOUTRETURN request
2962 */
2963 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2964 struct xdr_stream *xdr,
2965 struct nfs4_layoutreturn_args *args)
2966 {
2967 struct compound_hdr hdr = {
2968 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2969 };
2970
2971 encode_compound_hdr(xdr, req, &hdr);
2972 encode_sequence(xdr, &args->seq_args, &hdr);
2973 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2974 encode_layoutreturn(xdr, args, &hdr);
2975 encode_nops(&hdr);
2976 }
2977
2978 /*
2979 * Encode SECINFO_NO_NAME request
2980 */
2981 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2982 struct xdr_stream *xdr,
2983 struct nfs41_secinfo_no_name_args *args)
2984 {
2985 struct compound_hdr hdr = {
2986 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2987 };
2988
2989 encode_compound_hdr(xdr, req, &hdr);
2990 encode_sequence(xdr, &args->seq_args, &hdr);
2991 encode_putrootfh(xdr, &hdr);
2992 encode_secinfo_no_name(xdr, args, &hdr);
2993 encode_nops(&hdr);
2994 return 0;
2995 }
2996
2997 /*
2998 * Encode TEST_STATEID request
2999 */
3000 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3001 struct xdr_stream *xdr,
3002 struct nfs41_test_stateid_args *args)
3003 {
3004 struct compound_hdr hdr = {
3005 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3006 };
3007
3008 encode_compound_hdr(xdr, req, &hdr);
3009 encode_sequence(xdr, &args->seq_args, &hdr);
3010 encode_test_stateid(xdr, args, &hdr);
3011 encode_nops(&hdr);
3012 }
3013
3014 /*
3015 * Encode FREE_STATEID request
3016 */
3017 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3018 struct xdr_stream *xdr,
3019 struct nfs41_free_stateid_args *args)
3020 {
3021 struct compound_hdr hdr = {
3022 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3023 };
3024
3025 encode_compound_hdr(xdr, req, &hdr);
3026 encode_sequence(xdr, &args->seq_args, &hdr);
3027 encode_free_stateid(xdr, args, &hdr);
3028 encode_nops(&hdr);
3029 }
3030 #endif /* CONFIG_NFS_V4_1 */
3031
3032 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3033 {
3034 dprintk("nfs: %s: prematurely hit end of receive buffer. "
3035 "Remaining buffer length is %tu words.\n",
3036 func, xdr->end - xdr->p);
3037 }
3038
3039 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3040 {
3041 ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3042 NFS4_OPAQUE_LIMIT);
3043 if (unlikely(ret < 0)) {
3044 if (ret == -EBADMSG)
3045 print_overflow_msg(__func__, xdr);
3046 return -EIO;
3047 }
3048 *len = ret;
3049 return 0;
3050 }
3051
3052 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3053 {
3054 __be32 *p;
3055
3056 p = xdr_inline_decode(xdr, 8);
3057 if (unlikely(!p))
3058 goto out_overflow;
3059 hdr->status = be32_to_cpup(p++);
3060 hdr->taglen = be32_to_cpup(p);
3061
3062 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3063 if (unlikely(!p))
3064 goto out_overflow;
3065 hdr->tag = (char *)p;
3066 p += XDR_QUADLEN(hdr->taglen);
3067 hdr->nops = be32_to_cpup(p);
3068 if (unlikely(hdr->nops < 1))
3069 return nfs4_stat_to_errno(hdr->status);
3070 return 0;
3071 out_overflow:
3072 print_overflow_msg(__func__, xdr);
3073 return -EIO;
3074 }
3075
3076 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3077 int *nfs_retval)
3078 {
3079 __be32 *p;
3080 uint32_t opnum;
3081 int32_t nfserr;
3082
3083 p = xdr_inline_decode(xdr, 8);
3084 if (unlikely(!p))
3085 goto out_overflow;
3086 opnum = be32_to_cpup(p++);
3087 if (unlikely(opnum != expected))
3088 goto out_bad_operation;
3089 nfserr = be32_to_cpup(p);
3090 if (nfserr == NFS_OK)
3091 *nfs_retval = 0;
3092 else
3093 *nfs_retval = nfs4_stat_to_errno(nfserr);
3094 return true;
3095 out_bad_operation:
3096 dprintk("nfs: Server returned operation"
3097 " %d but we issued a request for %d\n",
3098 opnum, expected);
3099 *nfs_retval = -EREMOTEIO;
3100 return false;
3101 out_overflow:
3102 print_overflow_msg(__func__, xdr);
3103 *nfs_retval = -EIO;
3104 return false;
3105 }
3106
3107 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3108 {
3109 int retval;
3110
3111 __decode_op_hdr(xdr, expected, &retval);
3112 return retval;
3113 }
3114
3115 /* Dummy routine */
3116 static int decode_ace(struct xdr_stream *xdr, void *ace)
3117 {
3118 __be32 *p;
3119 unsigned int strlen;
3120 char *str;
3121
3122 p = xdr_inline_decode(xdr, 12);
3123 if (likely(p))
3124 return decode_opaque_inline(xdr, &strlen, &str);
3125 print_overflow_msg(__func__, xdr);
3126 return -EIO;
3127 }
3128
3129 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3130 {
3131 uint32_t bmlen;
3132 __be32 *p;
3133
3134 p = xdr_inline_decode(xdr, 4);
3135 if (unlikely(!p))
3136 goto out_overflow;
3137 bmlen = be32_to_cpup(p);
3138
3139 bitmap[0] = bitmap[1] = bitmap[2] = 0;
3140 p = xdr_inline_decode(xdr, (bmlen << 2));
3141 if (unlikely(!p))
3142 goto out_overflow;
3143 if (bmlen > 0) {
3144 bitmap[0] = be32_to_cpup(p++);
3145 if (bmlen > 1) {
3146 bitmap[1] = be32_to_cpup(p++);
3147 if (bmlen > 2)
3148 bitmap[2] = be32_to_cpup(p);
3149 }
3150 }
3151 return 0;
3152 out_overflow:
3153 print_overflow_msg(__func__, xdr);
3154 return -EIO;
3155 }
3156
3157 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3158 {
3159 __be32 *p;
3160
3161 p = xdr_inline_decode(xdr, 4);
3162 if (unlikely(!p))
3163 goto out_overflow;
3164 *attrlen = be32_to_cpup(p);
3165 *savep = xdr_stream_pos(xdr);
3166 return 0;
3167 out_overflow:
3168 print_overflow_msg(__func__, xdr);
3169 return -EIO;
3170 }
3171
3172 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3173 {
3174 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3175 int ret;
3176 ret = decode_attr_bitmap(xdr, bitmask);
3177 if (unlikely(ret < 0))
3178 return ret;
3179 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3180 } else
3181 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3182 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3183 bitmask[0], bitmask[1], bitmask[2]);
3184 return 0;
3185 }
3186
3187 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3188 {
3189 __be32 *p;
3190 int ret = 0;
3191
3192 *type = 0;
3193 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3194 return -EIO;
3195 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3196 p = xdr_inline_decode(xdr, 4);
3197 if (unlikely(!p))
3198 goto out_overflow;
3199 *type = be32_to_cpup(p);
3200 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3201 dprintk("%s: bad type %d\n", __func__, *type);
3202 return -EIO;
3203 }
3204 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3205 ret = NFS_ATTR_FATTR_TYPE;
3206 }
3207 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3208 return ret;
3209 out_overflow:
3210 print_overflow_msg(__func__, xdr);
3211 return -EIO;
3212 }
3213
3214 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3215 uint32_t *bitmap, uint32_t *type)
3216 {
3217 __be32 *p;
3218
3219 *type = 0;
3220 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3221 return -EIO;
3222 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3223 p = xdr_inline_decode(xdr, 4);
3224 if (unlikely(!p))
3225 goto out_overflow;
3226 *type = be32_to_cpup(p);
3227 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3228 }
3229 dprintk("%s: expire type=0x%x\n", __func__, *type);
3230 return 0;
3231 out_overflow:
3232 print_overflow_msg(__func__, xdr);
3233 return -EIO;
3234 }
3235
3236 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3237 {
3238 __be32 *p;
3239 int ret = 0;
3240
3241 *change = 0;
3242 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3243 return -EIO;
3244 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3245 p = xdr_inline_decode(xdr, 8);
3246 if (unlikely(!p))
3247 goto out_overflow;
3248 xdr_decode_hyper(p, change);
3249 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3250 ret = NFS_ATTR_FATTR_CHANGE;
3251 }
3252 dprintk("%s: change attribute=%Lu\n", __func__,
3253 (unsigned long long)*change);
3254 return ret;
3255 out_overflow:
3256 print_overflow_msg(__func__, xdr);
3257 return -EIO;
3258 }
3259
3260 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3261 {
3262 __be32 *p;
3263 int ret = 0;
3264
3265 *size = 0;
3266 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3267 return -EIO;
3268 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3269 p = xdr_inline_decode(xdr, 8);
3270 if (unlikely(!p))
3271 goto out_overflow;
3272 xdr_decode_hyper(p, size);
3273 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3274 ret = NFS_ATTR_FATTR_SIZE;
3275 }
3276 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3277 return ret;
3278 out_overflow:
3279 print_overflow_msg(__func__, xdr);
3280 return -EIO;
3281 }
3282
3283 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3284 {
3285 __be32 *p;
3286
3287 *res = 0;
3288 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3289 return -EIO;
3290 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3291 p = xdr_inline_decode(xdr, 4);
3292 if (unlikely(!p))
3293 goto out_overflow;
3294 *res = be32_to_cpup(p);
3295 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3296 }
3297 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3298 return 0;
3299 out_overflow:
3300 print_overflow_msg(__func__, xdr);
3301 return -EIO;
3302 }
3303
3304 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3305 {
3306 __be32 *p;
3307
3308 *res = 0;
3309 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3310 return -EIO;
3311 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3312 p = xdr_inline_decode(xdr, 4);
3313 if (unlikely(!p))
3314 goto out_overflow;
3315 *res = be32_to_cpup(p);
3316 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3317 }
3318 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3319 return 0;
3320 out_overflow:
3321 print_overflow_msg(__func__, xdr);
3322 return -EIO;
3323 }
3324
3325 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3326 {
3327 __be32 *p;
3328 int ret = 0;
3329
3330 fsid->major = 0;
3331 fsid->minor = 0;
3332 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3333 return -EIO;
3334 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3335 p = xdr_inline_decode(xdr, 16);
3336 if (unlikely(!p))
3337 goto out_overflow;
3338 p = xdr_decode_hyper(p, &fsid->major);
3339 xdr_decode_hyper(p, &fsid->minor);
3340 bitmap[0] &= ~FATTR4_WORD0_FSID;
3341 ret = NFS_ATTR_FATTR_FSID;
3342 }
3343 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3344 (unsigned long long)fsid->major,
3345 (unsigned long long)fsid->minor);
3346 return ret;
3347 out_overflow:
3348 print_overflow_msg(__func__, xdr);
3349 return -EIO;
3350 }
3351
3352 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3353 {
3354 __be32 *p;
3355
3356 *res = 60;
3357 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3358 return -EIO;
3359 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3360 p = xdr_inline_decode(xdr, 4);
3361 if (unlikely(!p))
3362 goto out_overflow;
3363 *res = be32_to_cpup(p);
3364 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3365 }
3366 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3367 return 0;
3368 out_overflow:
3369 print_overflow_msg(__func__, xdr);
3370 return -EIO;
3371 }
3372
3373 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3374 {
3375 __be32 *p;
3376
3377 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3378 return -EIO;
3379 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3380 p = xdr_inline_decode(xdr, 4);
3381 if (unlikely(!p))
3382 goto out_overflow;
3383 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3384 *res = -be32_to_cpup(p);
3385 }
3386 return 0;
3387 out_overflow:
3388 print_overflow_msg(__func__, xdr);
3389 return -EIO;
3390 }
3391
3392 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3393 uint32_t *bitmap, uint32_t *bitmask)
3394 {
3395 if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3396 int ret;
3397 ret = decode_attr_bitmap(xdr, bitmask);
3398 if (unlikely(ret < 0))
3399 return ret;
3400 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3401 } else
3402 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3403 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3404 bitmask[0], bitmask[1], bitmask[2]);
3405 return 0;
3406 }
3407
3408 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3409 {
3410 __be32 *p;
3411 int len;
3412
3413 if (fh != NULL)
3414 memset(fh, 0, sizeof(*fh));
3415
3416 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3417 return -EIO;
3418 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3419 p = xdr_inline_decode(xdr, 4);
3420 if (unlikely(!p))
3421 goto out_overflow;
3422 len = be32_to_cpup(p);
3423 if (len > NFS4_FHSIZE)
3424 return -EIO;
3425 p = xdr_inline_decode(xdr, len);
3426 if (unlikely(!p))
3427 goto out_overflow;
3428 if (fh != NULL) {
3429 memcpy(fh->data, p, len);
3430 fh->size = len;
3431 }
3432 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3433 }
3434 return 0;
3435 out_overflow:
3436 print_overflow_msg(__func__, xdr);
3437 return -EIO;
3438 }
3439
3440 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3441 {
3442 __be32 *p;
3443
3444 *res = 0;
3445 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3446 return -EIO;
3447 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3448 p = xdr_inline_decode(xdr, 4);
3449 if (unlikely(!p))
3450 goto out_overflow;
3451 *res = be32_to_cpup(p);
3452 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3453 }
3454 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3455 return 0;
3456 out_overflow:
3457 print_overflow_msg(__func__, xdr);
3458 return -EIO;
3459 }
3460
3461 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3462 {
3463 __be32 *p;
3464 int ret = 0;
3465
3466 *fileid = 0;
3467 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3468 return -EIO;
3469 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3470 p = xdr_inline_decode(xdr, 8);
3471 if (unlikely(!p))
3472 goto out_overflow;
3473 xdr_decode_hyper(p, fileid);
3474 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3475 ret = NFS_ATTR_FATTR_FILEID;
3476 }
3477 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3478 return ret;
3479 out_overflow:
3480 print_overflow_msg(__func__, xdr);
3481 return -EIO;
3482 }
3483
3484 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3485 {
3486 __be32 *p;
3487 int ret = 0;
3488
3489 *fileid = 0;
3490 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3491 return -EIO;
3492 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3493 p = xdr_inline_decode(xdr, 8);
3494 if (unlikely(!p))
3495 goto out_overflow;
3496 xdr_decode_hyper(p, fileid);
3497 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3498 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3499 }
3500 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3501 return ret;
3502 out_overflow:
3503 print_overflow_msg(__func__, xdr);
3504 return -EIO;
3505 }
3506
3507 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3508 {
3509 __be32 *p;
3510 int status = 0;
3511
3512 *res = 0;
3513 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3514 return -EIO;
3515 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3516 p = xdr_inline_decode(xdr, 8);
3517 if (unlikely(!p))
3518 goto out_overflow;
3519 xdr_decode_hyper(p, res);
3520 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3521 }
3522 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3523 return status;
3524 out_overflow:
3525 print_overflow_msg(__func__, xdr);
3526 return -EIO;
3527 }
3528
3529 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3530 {
3531 __be32 *p;
3532 int status = 0;
3533
3534 *res = 0;
3535 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3536 return -EIO;
3537 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3538 p = xdr_inline_decode(xdr, 8);
3539 if (unlikely(!p))
3540 goto out_overflow;
3541 xdr_decode_hyper(p, res);
3542 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3543 }
3544 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3545 return status;
3546 out_overflow:
3547 print_overflow_msg(__func__, xdr);
3548 return -EIO;
3549 }
3550
3551 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3552 {
3553 __be32 *p;
3554 int status = 0;
3555
3556 *res = 0;
3557 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3558 return -EIO;
3559 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3560 p = xdr_inline_decode(xdr, 8);
3561 if (unlikely(!p))
3562 goto out_overflow;
3563 xdr_decode_hyper(p, res);
3564 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3565 }
3566 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3567 return status;
3568 out_overflow:
3569 print_overflow_msg(__func__, xdr);
3570 return -EIO;
3571 }
3572
3573 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3574 {
3575 u32 n;
3576 __be32 *p;
3577 int status = 0;
3578
3579 p = xdr_inline_decode(xdr, 4);
3580 if (unlikely(!p))
3581 goto out_overflow;
3582 n = be32_to_cpup(p);
3583 if (n == 0)
3584 goto root_path;
3585 dprintk("pathname4: ");
3586 if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3587 dprintk("cannot parse %d components in path\n", n);
3588 goto out_eio;
3589 }
3590 for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3591 struct nfs4_string *component = &path->components[path->ncomponents];
3592 status = decode_opaque_inline(xdr, &component->len, &component->data);
3593 if (unlikely(status != 0))
3594 goto out_eio;
3595 ifdebug (XDR)
3596 pr_cont("%s%.*s ",
3597 (path->ncomponents != n ? "/ " : ""),
3598 component->len, component->data);
3599 }
3600 out:
3601 return status;
3602 root_path:
3603 /* a root pathname is sent as a zero component4 */
3604 path->ncomponents = 1;
3605 path->components[0].len=0;
3606 path->components[0].data=NULL;
3607 dprintk("pathname4: /\n");
3608 goto out;
3609 out_eio:
3610 dprintk(" status %d", status);
3611 status = -EIO;
3612 goto out;
3613 out_overflow:
3614 print_overflow_msg(__func__, xdr);
3615 return -EIO;
3616 }
3617
3618 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3619 {
3620 int n;
3621 __be32 *p;
3622 int status = -EIO;
3623
3624 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3625 goto out;
3626 status = 0;
3627 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3628 goto out;
3629 bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3630 status = -EIO;
3631 /* Ignore borken servers that return unrequested attrs */
3632 if (unlikely(res == NULL))
3633 goto out;
3634 dprintk("%s: fsroot:\n", __func__);
3635 status = decode_pathname(xdr, &res->fs_path);
3636 if (unlikely(status != 0))
3637 goto out;
3638 p = xdr_inline_decode(xdr, 4);
3639 if (unlikely(!p))
3640 goto out_overflow;
3641 n = be32_to_cpup(p);
3642 if (n <= 0)
3643 goto out_eio;
3644 for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3645 u32 m;
3646 struct nfs4_fs_location *loc;
3647
3648 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3649 break;
3650 loc = &res->locations[res->nlocations];
3651 p = xdr_inline_decode(xdr, 4);
3652 if (unlikely(!p))
3653 goto out_overflow;
3654 m = be32_to_cpup(p);
3655
3656 dprintk("%s: servers:\n", __func__);
3657 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3658 struct nfs4_string *server;
3659
3660 if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3661 unsigned int i;
3662 dprintk("%s: using first %u of %u servers "
3663 "returned for location %u\n",
3664 __func__,
3665 NFS4_FS_LOCATION_MAXSERVERS,
3666 m, res->nlocations);
3667 for (i = loc->nservers; i < m; i++) {
3668 unsigned int len;
3669 char *data;
3670 status = decode_opaque_inline(xdr, &len, &data);
3671 if (unlikely(status != 0))
3672 goto out_eio;
3673 }
3674 break;
3675 }
3676 server = &loc->servers[loc->nservers];
3677 status = decode_opaque_inline(xdr, &server->len, &server->data);
3678 if (unlikely(status != 0))
3679 goto out_eio;
3680 dprintk("%s ", server->data);
3681 }
3682 status = decode_pathname(xdr, &loc->rootpath);
3683 if (unlikely(status != 0))
3684 goto out_eio;
3685 }
3686 if (res->nlocations != 0)
3687 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3688 out:
3689 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3690 return status;
3691 out_overflow:
3692 print_overflow_msg(__func__, xdr);
3693 out_eio:
3694 status = -EIO;
3695 goto out;
3696 }
3697
3698 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3699 {
3700 __be32 *p;
3701 int status = 0;
3702
3703 *res = 0;
3704 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3705 return -EIO;
3706 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3707 p = xdr_inline_decode(xdr, 8);
3708 if (unlikely(!p))
3709 goto out_overflow;
3710 xdr_decode_hyper(p, res);
3711 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3712 }
3713 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3714 return status;
3715 out_overflow:
3716 print_overflow_msg(__func__, xdr);
3717 return -EIO;
3718 }
3719
3720 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3721 {
3722 __be32 *p;
3723 int status = 0;
3724
3725 *maxlink = 1;
3726 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3727 return -EIO;
3728 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3729 p = xdr_inline_decode(xdr, 4);
3730 if (unlikely(!p))
3731 goto out_overflow;
3732 *maxlink = be32_to_cpup(p);
3733 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3734 }
3735 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3736 return status;
3737 out_overflow:
3738 print_overflow_msg(__func__, xdr);
3739 return -EIO;
3740 }
3741
3742 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3743 {
3744 __be32 *p;
3745 int status = 0;
3746
3747 *maxname = 1024;
3748 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3749 return -EIO;
3750 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3751 p = xdr_inline_decode(xdr, 4);
3752 if (unlikely(!p))
3753 goto out_overflow;
3754 *maxname = be32_to_cpup(p);
3755 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3756 }
3757 dprintk("%s: maxname=%u\n", __func__, *maxname);
3758 return status;
3759 out_overflow:
3760 print_overflow_msg(__func__, xdr);
3761 return -EIO;
3762 }
3763
3764 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3765 {
3766 __be32 *p;
3767 int status = 0;
3768
3769 *res = 1024;
3770 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3771 return -EIO;
3772 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3773 uint64_t maxread;
3774 p = xdr_inline_decode(xdr, 8);
3775 if (unlikely(!p))
3776 goto out_overflow;
3777 xdr_decode_hyper(p, &maxread);
3778 if (maxread > 0x7FFFFFFF)
3779 maxread = 0x7FFFFFFF;
3780 *res = (uint32_t)maxread;
3781 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3782 }
3783 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3784 return status;
3785 out_overflow:
3786 print_overflow_msg(__func__, xdr);
3787 return -EIO;
3788 }
3789
3790 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3791 {
3792 __be32 *p;
3793 int status = 0;
3794
3795 *res = 1024;
3796 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3797 return -EIO;
3798 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3799 uint64_t maxwrite;
3800 p = xdr_inline_decode(xdr, 8);
3801 if (unlikely(!p))
3802 goto out_overflow;
3803 xdr_decode_hyper(p, &maxwrite);
3804 if (maxwrite > 0x7FFFFFFF)
3805 maxwrite = 0x7FFFFFFF;
3806 *res = (uint32_t)maxwrite;
3807 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3808 }
3809 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3810 return status;
3811 out_overflow:
3812 print_overflow_msg(__func__, xdr);
3813 return -EIO;
3814 }
3815
3816 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3817 {
3818 uint32_t tmp;
3819 __be32 *p;
3820 int ret = 0;
3821
3822 *mode = 0;
3823 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3824 return -EIO;
3825 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3826 p = xdr_inline_decode(xdr, 4);
3827 if (unlikely(!p))
3828 goto out_overflow;
3829 tmp = be32_to_cpup(p);
3830 *mode = tmp & ~S_IFMT;
3831 bitmap[1] &= ~FATTR4_WORD1_MODE;
3832 ret = NFS_ATTR_FATTR_MODE;
3833 }
3834 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3835 return ret;
3836 out_overflow:
3837 print_overflow_msg(__func__, xdr);
3838 return -EIO;
3839 }
3840
3841 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3842 {
3843 __be32 *p;
3844 int ret = 0;
3845
3846 *nlink = 1;
3847 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3848 return -EIO;
3849 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3850 p = xdr_inline_decode(xdr, 4);
3851 if (unlikely(!p))
3852 goto out_overflow;
3853 *nlink = be32_to_cpup(p);
3854 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3855 ret = NFS_ATTR_FATTR_NLINK;
3856 }
3857 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3858 return ret;
3859 out_overflow:
3860 print_overflow_msg(__func__, xdr);
3861 return -EIO;
3862 }
3863
3864 static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3865 struct nfs4_string *name, gfp_t gfp_flags)
3866 {
3867 ssize_t ret;
3868
3869 ret = xdr_stream_decode_string_dup(xdr, &name->data,
3870 XDR_MAX_NETOBJ, gfp_flags);
3871 name->len = 0;
3872 if (ret > 0)
3873 name->len = ret;
3874 return ret;
3875 }
3876
3877 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3878 const struct nfs_server *server, kuid_t *uid,
3879 struct nfs4_string *owner_name)
3880 {
3881 ssize_t len;
3882 char *p;
3883
3884 *uid = make_kuid(&init_user_ns, -2);
3885 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3886 return -EIO;
3887 if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3888 return 0;
3889 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3890
3891 if (owner_name != NULL) {
3892 len = decode_nfs4_string(xdr, owner_name, GFP_NOWAIT);
3893 if (len <= 0)
3894 goto out;
3895 dprintk("%s: name=%s\n", __func__, owner_name->data);
3896 return NFS_ATTR_FATTR_OWNER_NAME;
3897 } else {
3898 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3899 XDR_MAX_NETOBJ);
3900 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3901 goto out;
3902 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3903 return NFS_ATTR_FATTR_OWNER;
3904 }
3905 out:
3906 if (len != -EBADMSG)
3907 return 0;
3908 print_overflow_msg(__func__, xdr);
3909 return -EIO;
3910 }
3911
3912 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3913 const struct nfs_server *server, kgid_t *gid,
3914 struct nfs4_string *group_name)
3915 {
3916 ssize_t len;
3917 char *p;
3918
3919 *gid = make_kgid(&init_user_ns, -2);
3920 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3921 return -EIO;
3922 if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
3923 return 0;
3924 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3925
3926 if (group_name != NULL) {
3927 len = decode_nfs4_string(xdr, group_name, GFP_NOWAIT);
3928 if (len <= 0)
3929 goto out;
3930 dprintk("%s: name=%s\n", __func__, group_name->data);
3931 return NFS_ATTR_FATTR_GROUP_NAME;
3932 } else {
3933 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3934 XDR_MAX_NETOBJ);
3935 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
3936 goto out;
3937 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3938 return NFS_ATTR_FATTR_GROUP;
3939 }
3940 out:
3941 if (len != -EBADMSG)
3942 return 0;
3943 print_overflow_msg(__func__, xdr);
3944 return -EIO;
3945 }
3946
3947 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3948 {
3949 uint32_t major = 0, minor = 0;
3950 __be32 *p;
3951 int ret = 0;
3952
3953 *rdev = MKDEV(0,0);
3954 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3955 return -EIO;
3956 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3957 dev_t tmp;
3958
3959 p = xdr_inline_decode(xdr, 8);
3960 if (unlikely(!p))
3961 goto out_overflow;
3962 major = be32_to_cpup(p++);
3963 minor = be32_to_cpup(p);
3964 tmp = MKDEV(major, minor);
3965 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3966 *rdev = tmp;
3967 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3968 ret = NFS_ATTR_FATTR_RDEV;
3969 }
3970 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3971 return ret;
3972 out_overflow:
3973 print_overflow_msg(__func__, xdr);
3974 return -EIO;
3975 }
3976
3977 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3978 {
3979 __be32 *p;
3980 int status = 0;
3981
3982 *res = 0;
3983 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3984 return -EIO;
3985 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3986 p = xdr_inline_decode(xdr, 8);
3987 if (unlikely(!p))
3988 goto out_overflow;
3989 xdr_decode_hyper(p, res);
3990 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3991 }
3992 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3993 return status;
3994 out_overflow:
3995 print_overflow_msg(__func__, xdr);
3996 return -EIO;
3997 }
3998
3999 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4000 {
4001 __be32 *p;
4002 int status = 0;
4003
4004 *res = 0;
4005 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4006 return -EIO;
4007 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4008 p = xdr_inline_decode(xdr, 8);
4009 if (unlikely(!p))
4010 goto out_overflow;
4011 xdr_decode_hyper(p, res);
4012 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4013 }
4014 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4015 return status;
4016 out_overflow:
4017 print_overflow_msg(__func__, xdr);
4018 return -EIO;
4019 }
4020
4021 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4022 {
4023 __be32 *p;
4024 int status = 0;
4025
4026 *res = 0;
4027 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4028 return -EIO;
4029 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4030 p = xdr_inline_decode(xdr, 8);
4031 if (unlikely(!p))
4032 goto out_overflow;
4033 xdr_decode_hyper(p, res);
4034 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4035 }
4036 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4037 return status;
4038 out_overflow:
4039 print_overflow_msg(__func__, xdr);
4040 return -EIO;
4041 }
4042
4043 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4044 {
4045 __be32 *p;
4046 int ret = 0;
4047
4048 *used = 0;
4049 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4050 return -EIO;
4051 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4052 p = xdr_inline_decode(xdr, 8);
4053 if (unlikely(!p))
4054 goto out_overflow;
4055 xdr_decode_hyper(p, used);
4056 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4057 ret = NFS_ATTR_FATTR_SPACE_USED;
4058 }
4059 dprintk("%s: space used=%Lu\n", __func__,
4060 (unsigned long long)*used);
4061 return ret;
4062 out_overflow:
4063 print_overflow_msg(__func__, xdr);
4064 return -EIO;
4065 }
4066
4067 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4068 {
4069 __be32 *p;
4070 uint64_t sec;
4071 uint32_t nsec;
4072
4073 p = xdr_inline_decode(xdr, 12);
4074 if (unlikely(!p))
4075 goto out_overflow;
4076 p = xdr_decode_hyper(p, &sec);
4077 nsec = be32_to_cpup(p);
4078 time->tv_sec = (time_t)sec;
4079 time->tv_nsec = (long)nsec;
4080 return 0;
4081 out_overflow:
4082 print_overflow_msg(__func__, xdr);
4083 return -EIO;
4084 }
4085
4086 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4087 {
4088 int status = 0;
4089
4090 time->tv_sec = 0;
4091 time->tv_nsec = 0;
4092 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4093 return -EIO;
4094 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4095 status = decode_attr_time(xdr, time);
4096 if (status == 0)
4097 status = NFS_ATTR_FATTR_ATIME;
4098 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4099 }
4100 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4101 return status;
4102 }
4103
4104 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4105 {
4106 int status = 0;
4107
4108 time->tv_sec = 0;
4109 time->tv_nsec = 0;
4110 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4111 return -EIO;
4112 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4113 status = decode_attr_time(xdr, time);
4114 if (status == 0)
4115 status = NFS_ATTR_FATTR_CTIME;
4116 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4117 }
4118 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4119 return status;
4120 }
4121
4122 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4123 struct timespec *time)
4124 {
4125 int status = 0;
4126
4127 time->tv_sec = 0;
4128 time->tv_nsec = 0;
4129 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4130 return -EIO;
4131 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4132 status = decode_attr_time(xdr, time);
4133 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4134 }
4135 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4136 (long)time->tv_nsec);
4137 return status;
4138 }
4139
4140 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4141 struct nfs4_label *label)
4142 {
4143 uint32_t pi = 0;
4144 uint32_t lfs = 0;
4145 __u32 len;
4146 __be32 *p;
4147 int status = 0;
4148
4149 if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4150 return -EIO;
4151 if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4152 p = xdr_inline_decode(xdr, 4);
4153 if (unlikely(!p))
4154 goto out_overflow;
4155 lfs = be32_to_cpup(p++);
4156 p = xdr_inline_decode(xdr, 4);
4157 if (unlikely(!p))
4158 goto out_overflow;
4159 pi = be32_to_cpup(p++);
4160 p = xdr_inline_decode(xdr, 4);
4161 if (unlikely(!p))
4162 goto out_overflow;
4163 len = be32_to_cpup(p++);
4164 p = xdr_inline_decode(xdr, len);
4165 if (unlikely(!p))
4166 goto out_overflow;
4167 if (len < NFS4_MAXLABELLEN) {
4168 if (label) {
4169 memcpy(label->label, p, len);
4170 label->len = len;
4171 label->pi = pi;
4172 label->lfs = lfs;
4173 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4174 }
4175 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4176 } else
4177 printk(KERN_WARNING "%s: label too long (%u)!\n",
4178 __func__, len);
4179 }
4180 if (label && label->label)
4181 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4182 (char *)label->label, label->len, label->pi, label->lfs);
4183 return status;
4184
4185 out_overflow:
4186 print_overflow_msg(__func__, xdr);
4187 return -EIO;
4188 }
4189
4190 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4191 {
4192 int status = 0;
4193
4194 time->tv_sec = 0;
4195 time->tv_nsec = 0;
4196 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4197 return -EIO;
4198 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4199 status = decode_attr_time(xdr, time);
4200 if (status == 0)
4201 status = NFS_ATTR_FATTR_MTIME;
4202 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4203 }
4204 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4205 return status;
4206 }
4207
4208 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4209 {
4210 unsigned int attrwords = XDR_QUADLEN(attrlen);
4211 unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4212
4213 if (unlikely(attrwords != nwords)) {
4214 dprintk("%s: server returned incorrect attribute length: "
4215 "%u %c %u\n",
4216 __func__,
4217 attrwords << 2,
4218 (attrwords < nwords) ? '<' : '>',
4219 nwords << 2);
4220 return -EIO;
4221 }
4222 return 0;
4223 }
4224
4225 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4226 {
4227 __be32 *p;
4228
4229 p = xdr_inline_decode(xdr, 20);
4230 if (unlikely(!p))
4231 goto out_overflow;
4232 cinfo->atomic = be32_to_cpup(p++);
4233 p = xdr_decode_hyper(p, &cinfo->before);
4234 xdr_decode_hyper(p, &cinfo->after);
4235 return 0;
4236 out_overflow:
4237 print_overflow_msg(__func__, xdr);
4238 return -EIO;
4239 }
4240
4241 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4242 {
4243 __be32 *p;
4244 uint32_t supp, acc;
4245 int status;
4246
4247 status = decode_op_hdr(xdr, OP_ACCESS);
4248 if (status)
4249 return status;
4250 p = xdr_inline_decode(xdr, 8);
4251 if (unlikely(!p))
4252 goto out_overflow;
4253 supp = be32_to_cpup(p++);
4254 acc = be32_to_cpup(p);
4255 *supported = supp;
4256 *access = acc;
4257 return 0;
4258 out_overflow:
4259 print_overflow_msg(__func__, xdr);
4260 return -EIO;
4261 }
4262
4263 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4264 {
4265 ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4266 if (unlikely(ret < 0)) {
4267 print_overflow_msg(__func__, xdr);
4268 return -EIO;
4269 }
4270 return 0;
4271 }
4272
4273 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4274 {
4275 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4276 }
4277
4278 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4279 {
4280 stateid->type = NFS4_OPEN_STATEID_TYPE;
4281 return decode_stateid(xdr, stateid);
4282 }
4283
4284 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4285 {
4286 stateid->type = NFS4_LOCK_STATEID_TYPE;
4287 return decode_stateid(xdr, stateid);
4288 }
4289
4290 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4291 {
4292 stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4293 return decode_stateid(xdr, stateid);
4294 }
4295
4296 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4297 {
4298 int status;
4299
4300 status = decode_op_hdr(xdr, OP_CLOSE);
4301 if (status != -EIO)
4302 nfs_increment_open_seqid(status, res->seqid);
4303 if (!status)
4304 status = decode_open_stateid(xdr, &res->stateid);
4305 return status;
4306 }
4307
4308 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4309 {
4310 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4311 }
4312
4313 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4314 {
4315 return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4316 }
4317
4318 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4319 {
4320 int status;
4321
4322 status = decode_op_hdr(xdr, OP_COMMIT);
4323 if (!status)
4324 status = decode_write_verifier(xdr, &res->verf->verifier);
4325 return status;
4326 }
4327
4328 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4329 {
4330 __be32 *p;
4331 uint32_t bmlen;
4332 int status;
4333
4334 status = decode_op_hdr(xdr, OP_CREATE);
4335 if (status)
4336 return status;
4337 if ((status = decode_change_info(xdr, cinfo)))
4338 return status;
4339 p = xdr_inline_decode(xdr, 4);
4340 if (unlikely(!p))
4341 goto out_overflow;
4342 bmlen = be32_to_cpup(p);
4343 p = xdr_inline_decode(xdr, bmlen << 2);
4344 if (likely(p))
4345 return 0;
4346 out_overflow:
4347 print_overflow_msg(__func__, xdr);
4348 return -EIO;
4349 }
4350
4351 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4352 {
4353 unsigned int savep;
4354 uint32_t attrlen, bitmap[3] = {0};
4355 int status;
4356
4357 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4358 goto xdr_error;
4359 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4360 goto xdr_error;
4361 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4362 goto xdr_error;
4363 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4364 goto xdr_error;
4365 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4366 &res->fh_expire_type)) != 0)
4367 goto xdr_error;
4368 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4369 goto xdr_error;
4370 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4371 goto xdr_error;
4372 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4373 goto xdr_error;
4374 if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4375 res->exclcreat_bitmask)) != 0)
4376 goto xdr_error;
4377 status = verify_attr_len(xdr, savep, attrlen);
4378 xdr_error:
4379 dprintk("%s: xdr returned %d!\n", __func__, -status);
4380 return status;
4381 }
4382
4383 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4384 {
4385 unsigned int savep;
4386 uint32_t attrlen, bitmap[3] = {0};
4387 int status;
4388
4389 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4390 goto xdr_error;
4391 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4392 goto xdr_error;
4393 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4394 goto xdr_error;
4395
4396 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4397 goto xdr_error;
4398 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4399 goto xdr_error;
4400 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4401 goto xdr_error;
4402
4403 status = -EIO;
4404 if (unlikely(bitmap[0]))
4405 goto xdr_error;
4406
4407 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4408 goto xdr_error;
4409 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4410 goto xdr_error;
4411 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4412 goto xdr_error;
4413
4414 status = verify_attr_len(xdr, savep, attrlen);
4415 xdr_error:
4416 dprintk("%s: xdr returned %d!\n", __func__, -status);
4417 return status;
4418 }
4419
4420 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4421 {
4422 unsigned int savep;
4423 uint32_t attrlen, bitmap[3] = {0};
4424 int status;
4425
4426 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4427 goto xdr_error;
4428 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4429 goto xdr_error;
4430 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4431 goto xdr_error;
4432
4433 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4434 goto xdr_error;
4435 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4436 goto xdr_error;
4437
4438 status = verify_attr_len(xdr, savep, attrlen);
4439 xdr_error:
4440 dprintk("%s: xdr returned %d!\n", __func__, -status);
4441 return status;
4442 }
4443
4444 static int decode_threshold_hint(struct xdr_stream *xdr,
4445 uint32_t *bitmap,
4446 uint64_t *res,
4447 uint32_t hint_bit)
4448 {
4449 __be32 *p;
4450
4451 *res = 0;
4452 if (likely(bitmap[0] & hint_bit)) {
4453 p = xdr_inline_decode(xdr, 8);
4454 if (unlikely(!p))
4455 goto out_overflow;
4456 xdr_decode_hyper(p, res);
4457 }
4458 return 0;
4459 out_overflow:
4460 print_overflow_msg(__func__, xdr);
4461 return -EIO;
4462 }
4463
4464 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4465 struct nfs4_threshold *res)
4466 {
4467 __be32 *p;
4468 unsigned int savep;
4469 uint32_t bitmap[3] = {0,}, attrlen;
4470 int status;
4471
4472 /* layout type */
4473 p = xdr_inline_decode(xdr, 4);
4474 if (unlikely(!p)) {
4475 print_overflow_msg(__func__, xdr);
4476 return -EIO;
4477 }
4478 res->l_type = be32_to_cpup(p);
4479
4480 /* thi_hintset bitmap */
4481 status = decode_attr_bitmap(xdr, bitmap);
4482 if (status < 0)
4483 goto xdr_error;
4484
4485 /* thi_hintlist length */
4486 status = decode_attr_length(xdr, &attrlen, &savep);
4487 if (status < 0)
4488 goto xdr_error;
4489 /* thi_hintlist */
4490 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4491 if (status < 0)
4492 goto xdr_error;
4493 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4494 if (status < 0)
4495 goto xdr_error;
4496 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4497 THRESHOLD_RD_IO);
4498 if (status < 0)
4499 goto xdr_error;
4500 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4501 THRESHOLD_WR_IO);
4502 if (status < 0)
4503 goto xdr_error;
4504
4505 status = verify_attr_len(xdr, savep, attrlen);
4506 res->bm = bitmap[0];
4507
4508 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4509 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4510 res->wr_io_sz);
4511 xdr_error:
4512 dprintk("%s ret=%d!\n", __func__, status);
4513 return status;
4514 }
4515
4516 /*
4517 * Thresholds on pNFS direct I/O vrs MDS I/O
4518 */
4519 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4520 uint32_t *bitmap,
4521 struct nfs4_threshold *res)
4522 {
4523 __be32 *p;
4524 int status = 0;
4525 uint32_t num;
4526
4527 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4528 return -EIO;
4529 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4530 /* Did the server return an unrequested attribute? */
4531 if (unlikely(res == NULL))
4532 return -EREMOTEIO;
4533 p = xdr_inline_decode(xdr, 4);
4534 if (unlikely(!p))
4535 goto out_overflow;
4536 num = be32_to_cpup(p);
4537 if (num == 0)
4538 return 0;
4539 if (num > 1)
4540 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4541 "drivers per filesystem not supported\n",
4542 __func__);
4543
4544 status = decode_first_threshold_item4(xdr, res);
4545 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4546 }
4547 return status;
4548 out_overflow:
4549 print_overflow_msg(__func__, xdr);
4550 return -EIO;
4551 }
4552
4553 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4554 struct nfs_fattr *fattr, struct nfs_fh *fh,
4555 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4556 const struct nfs_server *server)
4557 {
4558 int status;
4559 umode_t fmode = 0;
4560 uint32_t type;
4561 int32_t err;
4562
4563 status = decode_attr_type(xdr, bitmap, &type);
4564 if (status < 0)
4565 goto xdr_error;
4566 fattr->mode = 0;
4567 if (status != 0) {
4568 fattr->mode |= nfs_type2fmt[type];
4569 fattr->valid |= status;
4570 }
4571
4572 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4573 if (status < 0)
4574 goto xdr_error;
4575 fattr->valid |= status;
4576
4577 status = decode_attr_size(xdr, bitmap, &fattr->size);
4578 if (status < 0)
4579 goto xdr_error;
4580 fattr->valid |= status;
4581
4582 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4583 if (status < 0)
4584 goto xdr_error;
4585 fattr->valid |= status;
4586
4587 err = 0;
4588 status = decode_attr_error(xdr, bitmap, &err);
4589 if (status < 0)
4590 goto xdr_error;
4591
4592 status = decode_attr_filehandle(xdr, bitmap, fh);
4593 if (status < 0)
4594 goto xdr_error;
4595
4596 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4597 if (status < 0)
4598 goto xdr_error;
4599 fattr->valid |= status;
4600
4601 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4602 if (status < 0)
4603 goto xdr_error;
4604 fattr->valid |= status;
4605
4606 status = -EIO;
4607 if (unlikely(bitmap[0]))
4608 goto xdr_error;
4609
4610 status = decode_attr_mode(xdr, bitmap, &fmode);
4611 if (status < 0)
4612 goto xdr_error;
4613 if (status != 0) {
4614 fattr->mode |= fmode;
4615 fattr->valid |= status;
4616 }
4617
4618 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4619 if (status < 0)
4620 goto xdr_error;
4621 fattr->valid |= status;
4622
4623 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4624 if (status < 0)
4625 goto xdr_error;
4626 fattr->valid |= status;
4627
4628 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4629 if (status < 0)
4630 goto xdr_error;
4631 fattr->valid |= status;
4632
4633 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4634 if (status < 0)
4635 goto xdr_error;
4636 fattr->valid |= status;
4637
4638 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4639 if (status < 0)
4640 goto xdr_error;
4641 fattr->valid |= status;
4642
4643 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4644 if (status < 0)
4645 goto xdr_error;
4646 fattr->valid |= status;
4647
4648 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4649 if (status < 0)
4650 goto xdr_error;
4651 fattr->valid |= status;
4652
4653 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4654 if (status < 0)
4655 goto xdr_error;
4656 fattr->valid |= status;
4657
4658 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4659 if (status < 0)
4660 goto xdr_error;
4661 fattr->valid |= status;
4662
4663 status = -EIO;
4664 if (unlikely(bitmap[1]))
4665 goto xdr_error;
4666
4667 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4668 if (status < 0)
4669 goto xdr_error;
4670
4671 if (label) {
4672 status = decode_attr_security_label(xdr, bitmap, label);
4673 if (status < 0)
4674 goto xdr_error;
4675 fattr->valid |= status;
4676 }
4677
4678 xdr_error:
4679 dprintk("%s: xdr returned %d\n", __func__, -status);
4680 return status;
4681 }
4682
4683 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4684 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4685 struct nfs4_label *label, const struct nfs_server *server)
4686 {
4687 unsigned int savep;
4688 uint32_t attrlen,
4689 bitmap[3] = {0};
4690 int status;
4691
4692 status = decode_op_hdr(xdr, OP_GETATTR);
4693 if (status < 0)
4694 goto xdr_error;
4695
4696 status = decode_attr_bitmap(xdr, bitmap);
4697 if (status < 0)
4698 goto xdr_error;
4699
4700 status = decode_attr_length(xdr, &attrlen, &savep);
4701 if (status < 0)
4702 goto xdr_error;
4703
4704 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4705 label, server);
4706 if (status < 0)
4707 goto xdr_error;
4708
4709 status = verify_attr_len(xdr, savep, attrlen);
4710 xdr_error:
4711 dprintk("%s: xdr returned %d\n", __func__, -status);
4712 return status;
4713 }
4714
4715 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4716 struct nfs4_label *label, const struct nfs_server *server)
4717 {
4718 return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4719 }
4720
4721 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4722 const struct nfs_server *server)
4723 {
4724 return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4725 }
4726
4727 /*
4728 * Decode potentially multiple layout types.
4729 */
4730 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4731 struct nfs_fsinfo *fsinfo)
4732 {
4733 __be32 *p;
4734 uint32_t i;
4735
4736 p = xdr_inline_decode(xdr, 4);
4737 if (unlikely(!p))
4738 goto out_overflow;
4739 fsinfo->nlayouttypes = be32_to_cpup(p);
4740
4741 /* pNFS is not supported by the underlying file system */
4742 if (fsinfo->nlayouttypes == 0)
4743 return 0;
4744
4745 /* Decode and set first layout type, move xdr->p past unused types */
4746 p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4747 if (unlikely(!p))
4748 goto out_overflow;
4749
4750 /* If we get too many, then just cap it at the max */
4751 if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4752 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4753 __func__, fsinfo->nlayouttypes);
4754 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4755 }
4756
4757 for(i = 0; i < fsinfo->nlayouttypes; ++i)
4758 fsinfo->layouttype[i] = be32_to_cpup(p++);
4759 return 0;
4760 out_overflow:
4761 print_overflow_msg(__func__, xdr);
4762 return -EIO;
4763 }
4764
4765 /*
4766 * The type of file system exported.
4767 * Note we must ensure that layouttype is set in any non-error case.
4768 */
4769 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4770 struct nfs_fsinfo *fsinfo)
4771 {
4772 int status = 0;
4773
4774 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4775 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4776 return -EIO;
4777 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4778 status = decode_pnfs_layout_types(xdr, fsinfo);
4779 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4780 }
4781 return status;
4782 }
4783
4784 /*
4785 * The prefered block size for layout directed io
4786 */
4787 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4788 uint32_t *res)
4789 {
4790 __be32 *p;
4791
4792 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4793 *res = 0;
4794 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4795 p = xdr_inline_decode(xdr, 4);
4796 if (unlikely(!p)) {
4797 print_overflow_msg(__func__, xdr);
4798 return -EIO;
4799 }
4800 *res = be32_to_cpup(p);
4801 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4802 }
4803 return 0;
4804 }
4805
4806 /*
4807 * The granularity of a CLONE operation.
4808 */
4809 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4810 uint32_t *res)
4811 {
4812 __be32 *p;
4813
4814 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4815 *res = 0;
4816 if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4817 p = xdr_inline_decode(xdr, 4);
4818 if (unlikely(!p)) {
4819 print_overflow_msg(__func__, xdr);
4820 return -EIO;
4821 }
4822 *res = be32_to_cpup(p);
4823 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4824 }
4825 return 0;
4826 }
4827
4828 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4829 {
4830 unsigned int savep;
4831 uint32_t attrlen, bitmap[3];
4832 int status;
4833
4834 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4835 goto xdr_error;
4836 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4837 goto xdr_error;
4838 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4839 goto xdr_error;
4840
4841 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4842
4843 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4844 goto xdr_error;
4845 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4846 goto xdr_error;
4847 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4848 goto xdr_error;
4849 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4850 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4851 goto xdr_error;
4852 fsinfo->wtpref = fsinfo->wtmax;
4853
4854 status = -EIO;
4855 if (unlikely(bitmap[0]))
4856 goto xdr_error;
4857
4858 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4859 if (status != 0)
4860 goto xdr_error;
4861 status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4862 if (status != 0)
4863 goto xdr_error;
4864
4865 status = -EIO;
4866 if (unlikely(bitmap[1]))
4867 goto xdr_error;
4868
4869 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4870 if (status)
4871 goto xdr_error;
4872 status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4873 if (status)
4874 goto xdr_error;
4875
4876 status = verify_attr_len(xdr, savep, attrlen);
4877 xdr_error:
4878 dprintk("%s: xdr returned %d!\n", __func__, -status);
4879 return status;
4880 }
4881
4882 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4883 {
4884 __be32 *p;
4885 uint32_t len;
4886 int status;
4887
4888 /* Zero handle first to allow comparisons */
4889 memset(fh, 0, sizeof(*fh));
4890
4891 status = decode_op_hdr(xdr, OP_GETFH);
4892 if (status)
4893 return status;
4894
4895 p = xdr_inline_decode(xdr, 4);
4896 if (unlikely(!p))
4897 goto out_overflow;
4898 len = be32_to_cpup(p);
4899 if (len > NFS4_FHSIZE)
4900 return -EIO;
4901 fh->size = len;
4902 p = xdr_inline_decode(xdr, len);
4903 if (unlikely(!p))
4904 goto out_overflow;
4905 memcpy(fh->data, p, len);
4906 return 0;
4907 out_overflow:
4908 print_overflow_msg(__func__, xdr);
4909 return -EIO;
4910 }
4911
4912 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4913 {
4914 int status;
4915
4916 status = decode_op_hdr(xdr, OP_LINK);
4917 if (status)
4918 return status;
4919 return decode_change_info(xdr, cinfo);
4920 }
4921
4922 /*
4923 * We create the owner, so we know a proper owner.id length is 4.
4924 */
4925 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4926 {
4927 uint64_t offset, length, clientid;
4928 __be32 *p;
4929 uint32_t namelen, type;
4930
4931 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4932 if (unlikely(!p))
4933 goto out_overflow;
4934 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4935 p = xdr_decode_hyper(p, &length);
4936 type = be32_to_cpup(p++); /* 4 byte read */
4937 if (fl != NULL) { /* manipulate file lock */
4938 fl->fl_start = (loff_t)offset;
4939 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4940 if (length == ~(uint64_t)0)
4941 fl->fl_end = OFFSET_MAX;
4942 fl->fl_type = F_WRLCK;
4943 if (type & 1)
4944 fl->fl_type = F_RDLCK;
4945 fl->fl_pid = 0;
4946 }
4947 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4948 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4949 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4950 if (likely(p))
4951 return -NFS4ERR_DENIED;
4952 out_overflow:
4953 print_overflow_msg(__func__, xdr);
4954 return -EIO;
4955 }
4956
4957 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4958 {
4959 int status;
4960
4961 status = decode_op_hdr(xdr, OP_LOCK);
4962 if (status == -EIO)
4963 goto out;
4964 if (status == 0) {
4965 status = decode_lock_stateid(xdr, &res->stateid);
4966 if (unlikely(status))
4967 goto out;
4968 } else if (status == -NFS4ERR_DENIED)
4969 status = decode_lock_denied(xdr, NULL);
4970 if (res->open_seqid != NULL)
4971 nfs_increment_open_seqid(status, res->open_seqid);
4972 nfs_increment_lock_seqid(status, res->lock_seqid);
4973 out:
4974 return status;
4975 }
4976
4977 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4978 {
4979 int status;
4980 status = decode_op_hdr(xdr, OP_LOCKT);
4981 if (status == -NFS4ERR_DENIED)
4982 return decode_lock_denied(xdr, res->denied);
4983 return status;
4984 }
4985
4986 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4987 {
4988 int status;
4989
4990 status = decode_op_hdr(xdr, OP_LOCKU);
4991 if (status != -EIO)
4992 nfs_increment_lock_seqid(status, res->seqid);
4993 if (status == 0)
4994 status = decode_lock_stateid(xdr, &res->stateid);
4995 return status;
4996 }
4997
4998 static int decode_release_lockowner(struct xdr_stream *xdr)
4999 {
5000 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5001 }
5002
5003 static int decode_lookup(struct xdr_stream *xdr)
5004 {
5005 return decode_op_hdr(xdr, OP_LOOKUP);
5006 }
5007
5008 /* This is too sick! */
5009 static int decode_space_limit(struct xdr_stream *xdr,
5010 unsigned long *pagemod_limit)
5011 {
5012 __be32 *p;
5013 uint32_t limit_type, nblocks, blocksize;
5014 u64 maxsize = 0;
5015
5016 p = xdr_inline_decode(xdr, 12);
5017 if (unlikely(!p))
5018 goto out_overflow;
5019 limit_type = be32_to_cpup(p++);
5020 switch (limit_type) {
5021 case NFS4_LIMIT_SIZE:
5022 xdr_decode_hyper(p, &maxsize);
5023 break;
5024 case NFS4_LIMIT_BLOCKS:
5025 nblocks = be32_to_cpup(p++);
5026 blocksize = be32_to_cpup(p);
5027 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5028 }
5029 maxsize >>= PAGE_SHIFT;
5030 *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5031 return 0;
5032 out_overflow:
5033 print_overflow_msg(__func__, xdr);
5034 return -EIO;
5035 }
5036
5037 static int decode_rw_delegation(struct xdr_stream *xdr,
5038 uint32_t delegation_type,
5039 struct nfs_openres *res)
5040 {
5041 __be32 *p;
5042 int status;
5043
5044 status = decode_delegation_stateid(xdr, &res->delegation);
5045 if (unlikely(status))
5046 return status;
5047 p = xdr_inline_decode(xdr, 4);
5048 if (unlikely(!p))
5049 goto out_overflow;
5050 res->do_recall = be32_to_cpup(p);
5051
5052 switch (delegation_type) {
5053 case NFS4_OPEN_DELEGATE_READ:
5054 res->delegation_type = FMODE_READ;
5055 break;
5056 case NFS4_OPEN_DELEGATE_WRITE:
5057 res->delegation_type = FMODE_WRITE|FMODE_READ;
5058 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5059 return -EIO;
5060 }
5061 return decode_ace(xdr, NULL);
5062 out_overflow:
5063 print_overflow_msg(__func__, xdr);
5064 return -EIO;
5065 }
5066
5067 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5068 {
5069 __be32 *p;
5070 uint32_t why_no_delegation;
5071
5072 p = xdr_inline_decode(xdr, 4);
5073 if (unlikely(!p))
5074 goto out_overflow;
5075 why_no_delegation = be32_to_cpup(p);
5076 switch (why_no_delegation) {
5077 case WND4_CONTENTION:
5078 case WND4_RESOURCE:
5079 xdr_inline_decode(xdr, 4);
5080 /* Ignore for now */
5081 }
5082 return 0;
5083 out_overflow:
5084 print_overflow_msg(__func__, xdr);
5085 return -EIO;
5086 }
5087
5088 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5089 {
5090 __be32 *p;
5091 uint32_t delegation_type;
5092
5093 p = xdr_inline_decode(xdr, 4);
5094 if (unlikely(!p))
5095 goto out_overflow;
5096 delegation_type = be32_to_cpup(p);
5097 res->delegation_type = 0;
5098 switch (delegation_type) {
5099 case NFS4_OPEN_DELEGATE_NONE:
5100 return 0;
5101 case NFS4_OPEN_DELEGATE_READ:
5102 case NFS4_OPEN_DELEGATE_WRITE:
5103 return decode_rw_delegation(xdr, delegation_type, res);
5104 case NFS4_OPEN_DELEGATE_NONE_EXT:
5105 return decode_no_delegation(xdr, res);
5106 }
5107 return -EIO;
5108 out_overflow:
5109 print_overflow_msg(__func__, xdr);
5110 return -EIO;
5111 }
5112
5113 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5114 {
5115 __be32 *p;
5116 uint32_t savewords, bmlen, i;
5117 int status;
5118
5119 if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5120 return status;
5121 nfs_increment_open_seqid(status, res->seqid);
5122 if (status)
5123 return status;
5124 status = decode_open_stateid(xdr, &res->stateid);
5125 if (unlikely(status))
5126 return status;
5127
5128 decode_change_info(xdr, &res->cinfo);
5129
5130 p = xdr_inline_decode(xdr, 8);
5131 if (unlikely(!p))
5132 goto out_overflow;
5133 res->rflags = be32_to_cpup(p++);
5134 bmlen = be32_to_cpup(p);
5135 if (bmlen > 10)
5136 goto xdr_error;
5137
5138 p = xdr_inline_decode(xdr, bmlen << 2);
5139 if (unlikely(!p))
5140 goto out_overflow;
5141 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5142 for (i = 0; i < savewords; ++i)
5143 res->attrset[i] = be32_to_cpup(p++);
5144 for (; i < NFS4_BITMAP_SIZE; i++)
5145 res->attrset[i] = 0;
5146
5147 return decode_delegation(xdr, res);
5148 xdr_error:
5149 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5150 return -EIO;
5151 out_overflow:
5152 print_overflow_msg(__func__, xdr);
5153 return -EIO;
5154 }
5155
5156 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5157 {
5158 int status;
5159
5160 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5161 if (status != -EIO)
5162 nfs_increment_open_seqid(status, res->seqid);
5163 if (!status)
5164 status = decode_open_stateid(xdr, &res->stateid);
5165 return status;
5166 }
5167
5168 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5169 {
5170 int status;
5171
5172 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5173 if (status != -EIO)
5174 nfs_increment_open_seqid(status, res->seqid);
5175 if (!status)
5176 status = decode_open_stateid(xdr, &res->stateid);
5177 return status;
5178 }
5179
5180 static int decode_putfh(struct xdr_stream *xdr)
5181 {
5182 return decode_op_hdr(xdr, OP_PUTFH);
5183 }
5184
5185 static int decode_putrootfh(struct xdr_stream *xdr)
5186 {
5187 return decode_op_hdr(xdr, OP_PUTROOTFH);
5188 }
5189
5190 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5191 struct nfs_pgio_res *res)
5192 {
5193 __be32 *p;
5194 uint32_t count, eof, recvd;
5195 int status;
5196
5197 status = decode_op_hdr(xdr, OP_READ);
5198 if (status)
5199 return status;
5200 p = xdr_inline_decode(xdr, 8);
5201 if (unlikely(!p))
5202 goto out_overflow;
5203 eof = be32_to_cpup(p++);
5204 count = be32_to_cpup(p);
5205 recvd = xdr_read_pages(xdr, count);
5206 if (count > recvd) {
5207 dprintk("NFS: server cheating in read reply: "
5208 "count %u > recvd %u\n", count, recvd);
5209 count = recvd;
5210 eof = 0;
5211 }
5212 res->eof = eof;
5213 res->count = count;
5214 return 0;
5215 out_overflow:
5216 print_overflow_msg(__func__, xdr);
5217 return -EIO;
5218 }
5219
5220 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5221 {
5222 int status;
5223 __be32 verf[2];
5224
5225 status = decode_op_hdr(xdr, OP_READDIR);
5226 if (!status)
5227 status = decode_verifier(xdr, readdir->verifier.data);
5228 if (unlikely(status))
5229 return status;
5230 memcpy(verf, readdir->verifier.data, sizeof(verf));
5231 dprintk("%s: verifier = %08x:%08x\n",
5232 __func__, verf[0], verf[1]);
5233 return xdr_read_pages(xdr, xdr->buf->page_len);
5234 }
5235
5236 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5237 {
5238 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5239 u32 len, recvd;
5240 __be32 *p;
5241 int status;
5242
5243 status = decode_op_hdr(xdr, OP_READLINK);
5244 if (status)
5245 return status;
5246
5247 /* Convert length of symlink */
5248 p = xdr_inline_decode(xdr, 4);
5249 if (unlikely(!p))
5250 goto out_overflow;
5251 len = be32_to_cpup(p);
5252 if (len >= rcvbuf->page_len || len <= 0) {
5253 dprintk("nfs: server returned giant symlink!\n");
5254 return -ENAMETOOLONG;
5255 }
5256 recvd = xdr_read_pages(xdr, len);
5257 if (recvd < len) {
5258 dprintk("NFS: server cheating in readlink reply: "
5259 "count %u > recvd %u\n", len, recvd);
5260 return -EIO;
5261 }
5262 /*
5263 * The XDR encode routine has set things up so that
5264 * the link text will be copied directly into the
5265 * buffer. We just have to do overflow-checking,
5266 * and and null-terminate the text (the VFS expects
5267 * null-termination).
5268 */
5269 xdr_terminate_string(rcvbuf, len);
5270 return 0;
5271 out_overflow:
5272 print_overflow_msg(__func__, xdr);
5273 return -EIO;
5274 }
5275
5276 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5277 {
5278 int status;
5279
5280 status = decode_op_hdr(xdr, OP_REMOVE);
5281 if (status)
5282 goto out;
5283 status = decode_change_info(xdr, cinfo);
5284 out:
5285 return status;
5286 }
5287
5288 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5289 struct nfs4_change_info *new_cinfo)
5290 {
5291 int status;
5292
5293 status = decode_op_hdr(xdr, OP_RENAME);
5294 if (status)
5295 goto out;
5296 if ((status = decode_change_info(xdr, old_cinfo)))
5297 goto out;
5298 status = decode_change_info(xdr, new_cinfo);
5299 out:
5300 return status;
5301 }
5302
5303 static int decode_renew(struct xdr_stream *xdr)
5304 {
5305 return decode_op_hdr(xdr, OP_RENEW);
5306 }
5307
5308 static int
5309 decode_restorefh(struct xdr_stream *xdr)
5310 {
5311 return decode_op_hdr(xdr, OP_RESTOREFH);
5312 }
5313
5314 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5315 struct nfs_getaclres *res)
5316 {
5317 unsigned int savep;
5318 uint32_t attrlen,
5319 bitmap[3] = {0};
5320 int status;
5321 unsigned int pg_offset;
5322
5323 res->acl_len = 0;
5324 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5325 goto out;
5326
5327 xdr_enter_page(xdr, xdr->buf->page_len);
5328
5329 /* Calculate the offset of the page data */
5330 pg_offset = xdr->buf->head[0].iov_len;
5331
5332 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5333 goto out;
5334 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5335 goto out;
5336
5337 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5338 return -EIO;
5339 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5340
5341 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5342 * are stored with the acl data to handle the problem of
5343 * variable length bitmaps.*/
5344 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5345 res->acl_len = attrlen;
5346
5347 /* Check for receive buffer overflow */
5348 if (res->acl_len > (xdr->nwords << 2) ||
5349 res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5350 res->acl_flags |= NFS4_ACL_TRUNC;
5351 dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5352 attrlen, xdr->nwords << 2);
5353 }
5354 } else
5355 status = -EOPNOTSUPP;
5356
5357 out:
5358 return status;
5359 }
5360
5361 static int
5362 decode_savefh(struct xdr_stream *xdr)
5363 {
5364 return decode_op_hdr(xdr, OP_SAVEFH);
5365 }
5366
5367 static int decode_setattr(struct xdr_stream *xdr)
5368 {
5369 __be32 *p;
5370 uint32_t bmlen;
5371 int status;
5372
5373 status = decode_op_hdr(xdr, OP_SETATTR);
5374 if (status)
5375 return status;
5376 p = xdr_inline_decode(xdr, 4);
5377 if (unlikely(!p))
5378 goto out_overflow;
5379 bmlen = be32_to_cpup(p);
5380 p = xdr_inline_decode(xdr, bmlen << 2);
5381 if (likely(p))
5382 return 0;
5383 out_overflow:
5384 print_overflow_msg(__func__, xdr);
5385 return -EIO;
5386 }
5387
5388 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5389 {
5390 __be32 *p;
5391 uint32_t opnum;
5392 int32_t nfserr;
5393
5394 p = xdr_inline_decode(xdr, 8);
5395 if (unlikely(!p))
5396 goto out_overflow;
5397 opnum = be32_to_cpup(p++);
5398 if (opnum != OP_SETCLIENTID) {
5399 dprintk("nfs: decode_setclientid: Server returned operation"
5400 " %d\n", opnum);
5401 return -EIO;
5402 }
5403 nfserr = be32_to_cpup(p);
5404 if (nfserr == NFS_OK) {
5405 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5406 if (unlikely(!p))
5407 goto out_overflow;
5408 p = xdr_decode_hyper(p, &res->clientid);
5409 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5410 } else if (nfserr == NFSERR_CLID_INUSE) {
5411 uint32_t len;
5412
5413 /* skip netid string */
5414 p = xdr_inline_decode(xdr, 4);
5415 if (unlikely(!p))
5416 goto out_overflow;
5417 len = be32_to_cpup(p);
5418 p = xdr_inline_decode(xdr, len);
5419 if (unlikely(!p))
5420 goto out_overflow;
5421
5422 /* skip uaddr string */
5423 p = xdr_inline_decode(xdr, 4);
5424 if (unlikely(!p))
5425 goto out_overflow;
5426 len = be32_to_cpup(p);
5427 p = xdr_inline_decode(xdr, len);
5428 if (unlikely(!p))
5429 goto out_overflow;
5430 return -NFSERR_CLID_INUSE;
5431 } else
5432 return nfs4_stat_to_errno(nfserr);
5433
5434 return 0;
5435 out_overflow:
5436 print_overflow_msg(__func__, xdr);
5437 return -EIO;
5438 }
5439
5440 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5441 {
5442 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5443 }
5444
5445 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5446 {
5447 __be32 *p;
5448 int status;
5449
5450 status = decode_op_hdr(xdr, OP_WRITE);
5451 if (status)
5452 return status;
5453
5454 p = xdr_inline_decode(xdr, 8);
5455 if (unlikely(!p))
5456 goto out_overflow;
5457 res->count = be32_to_cpup(p++);
5458 res->verf->committed = be32_to_cpup(p++);
5459 return decode_write_verifier(xdr, &res->verf->verifier);
5460 out_overflow:
5461 print_overflow_msg(__func__, xdr);
5462 return -EIO;
5463 }
5464
5465 static int decode_delegreturn(struct xdr_stream *xdr)
5466 {
5467 return decode_op_hdr(xdr, OP_DELEGRETURN);
5468 }
5469
5470 static int decode_secinfo_gss(struct xdr_stream *xdr,
5471 struct nfs4_secinfo4 *flavor)
5472 {
5473 u32 oid_len;
5474 __be32 *p;
5475
5476 p = xdr_inline_decode(xdr, 4);
5477 if (unlikely(!p))
5478 goto out_overflow;
5479 oid_len = be32_to_cpup(p);
5480 if (oid_len > GSS_OID_MAX_LEN)
5481 goto out_err;
5482
5483 p = xdr_inline_decode(xdr, oid_len);
5484 if (unlikely(!p))
5485 goto out_overflow;
5486 memcpy(flavor->flavor_info.oid.data, p, oid_len);
5487 flavor->flavor_info.oid.len = oid_len;
5488
5489 p = xdr_inline_decode(xdr, 8);
5490 if (unlikely(!p))
5491 goto out_overflow;
5492 flavor->flavor_info.qop = be32_to_cpup(p++);
5493 flavor->flavor_info.service = be32_to_cpup(p);
5494
5495 return 0;
5496
5497 out_overflow:
5498 print_overflow_msg(__func__, xdr);
5499 return -EIO;
5500 out_err:
5501 return -EINVAL;
5502 }
5503
5504 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5505 {
5506 struct nfs4_secinfo4 *sec_flavor;
5507 unsigned int i, num_flavors;
5508 int status;
5509 __be32 *p;
5510
5511 p = xdr_inline_decode(xdr, 4);
5512 if (unlikely(!p))
5513 goto out_overflow;
5514
5515 res->flavors->num_flavors = 0;
5516 num_flavors = be32_to_cpup(p);
5517
5518 for (i = 0; i < num_flavors; i++) {
5519 sec_flavor = &res->flavors->flavors[i];
5520 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5521 break;
5522
5523 p = xdr_inline_decode(xdr, 4);
5524 if (unlikely(!p))
5525 goto out_overflow;
5526 sec_flavor->flavor = be32_to_cpup(p);
5527
5528 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5529 status = decode_secinfo_gss(xdr, sec_flavor);
5530 if (status)
5531 goto out;
5532 }
5533 res->flavors->num_flavors++;
5534 }
5535
5536 status = 0;
5537 out:
5538 return status;
5539 out_overflow:
5540 print_overflow_msg(__func__, xdr);
5541 return -EIO;
5542 }
5543
5544 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5545 {
5546 int status = decode_op_hdr(xdr, OP_SECINFO);
5547 if (status)
5548 return status;
5549 return decode_secinfo_common(xdr, res);
5550 }
5551
5552 #if defined(CONFIG_NFS_V4_1)
5553 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5554 {
5555 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5556 if (status)
5557 return status;
5558 return decode_secinfo_common(xdr, res);
5559 }
5560
5561 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5562 {
5563 __be32 *p;
5564 uint32_t bitmap_words;
5565 unsigned int i;
5566
5567 p = xdr_inline_decode(xdr, 4);
5568 if (!p)
5569 return -EIO;
5570 bitmap_words = be32_to_cpup(p++);
5571 if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5572 return -EIO;
5573 p = xdr_inline_decode(xdr, 4 * bitmap_words);
5574 for (i = 0; i < bitmap_words; i++)
5575 op_map->u.words[i] = be32_to_cpup(p++);
5576
5577 return 0;
5578 }
5579
5580 static int decode_exchange_id(struct xdr_stream *xdr,
5581 struct nfs41_exchange_id_res *res)
5582 {
5583 __be32 *p;
5584 uint32_t dummy;
5585 char *dummy_str;
5586 int status;
5587 uint32_t impl_id_count;
5588
5589 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5590 if (status)
5591 return status;
5592
5593 p = xdr_inline_decode(xdr, 8);
5594 if (unlikely(!p))
5595 goto out_overflow;
5596 xdr_decode_hyper(p, &res->clientid);
5597 p = xdr_inline_decode(xdr, 12);
5598 if (unlikely(!p))
5599 goto out_overflow;
5600 res->seqid = be32_to_cpup(p++);
5601 res->flags = be32_to_cpup(p++);
5602
5603 res->state_protect.how = be32_to_cpup(p);
5604 switch (res->state_protect.how) {
5605 case SP4_NONE:
5606 break;
5607 case SP4_MACH_CRED:
5608 status = decode_op_map(xdr, &res->state_protect.enforce);
5609 if (status)
5610 return status;
5611 status = decode_op_map(xdr, &res->state_protect.allow);
5612 if (status)
5613 return status;
5614 break;
5615 default:
5616 WARN_ON_ONCE(1);
5617 return -EIO;
5618 }
5619
5620 /* server_owner4.so_minor_id */
5621 p = xdr_inline_decode(xdr, 8);
5622 if (unlikely(!p))
5623 goto out_overflow;
5624 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5625
5626 /* server_owner4.so_major_id */
5627 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5628 if (unlikely(status))
5629 return status;
5630 memcpy(res->server_owner->major_id, dummy_str, dummy);
5631 res->server_owner->major_id_sz = dummy;
5632
5633 /* server_scope4 */
5634 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5635 if (unlikely(status))
5636 return status;
5637 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5638 res->server_scope->server_scope_sz = dummy;
5639
5640 /* Implementation Id */
5641 p = xdr_inline_decode(xdr, 4);
5642 if (unlikely(!p))
5643 goto out_overflow;
5644 impl_id_count = be32_to_cpup(p++);
5645
5646 if (impl_id_count) {
5647 /* nii_domain */
5648 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5649 if (unlikely(status))
5650 return status;
5651 memcpy(res->impl_id->domain, dummy_str, dummy);
5652
5653 /* nii_name */
5654 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5655 if (unlikely(status))
5656 return status;
5657 memcpy(res->impl_id->name, dummy_str, dummy);
5658
5659 /* nii_date */
5660 p = xdr_inline_decode(xdr, 12);
5661 if (unlikely(!p))
5662 goto out_overflow;
5663 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5664 res->impl_id->date.nseconds = be32_to_cpup(p);
5665
5666 /* if there's more than one entry, ignore the rest */
5667 }
5668 return 0;
5669 out_overflow:
5670 print_overflow_msg(__func__, xdr);
5671 return -EIO;
5672 }
5673
5674 static int decode_chan_attrs(struct xdr_stream *xdr,
5675 struct nfs4_channel_attrs *attrs)
5676 {
5677 __be32 *p;
5678 u32 nr_attrs, val;
5679
5680 p = xdr_inline_decode(xdr, 28);
5681 if (unlikely(!p))
5682 goto out_overflow;
5683 val = be32_to_cpup(p++); /* headerpadsz */
5684 if (val)
5685 return -EINVAL; /* no support for header padding yet */
5686 attrs->max_rqst_sz = be32_to_cpup(p++);
5687 attrs->max_resp_sz = be32_to_cpup(p++);
5688 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5689 attrs->max_ops = be32_to_cpup(p++);
5690 attrs->max_reqs = be32_to_cpup(p++);
5691 nr_attrs = be32_to_cpup(p);
5692 if (unlikely(nr_attrs > 1)) {
5693 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5694 "count %u\n", __func__, nr_attrs);
5695 return -EINVAL;
5696 }
5697 if (nr_attrs == 1) {
5698 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5699 if (unlikely(!p))
5700 goto out_overflow;
5701 }
5702 return 0;
5703 out_overflow:
5704 print_overflow_msg(__func__, xdr);
5705 return -EIO;
5706 }
5707
5708 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5709 {
5710 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5711 }
5712
5713 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5714 struct nfs41_bind_conn_to_session_res *res)
5715 {
5716 __be32 *p;
5717 int status;
5718
5719 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5720 if (!status)
5721 status = decode_sessionid(xdr, &res->sessionid);
5722 if (unlikely(status))
5723 return status;
5724
5725 /* dir flags, rdma mode bool */
5726 p = xdr_inline_decode(xdr, 8);
5727 if (unlikely(!p))
5728 goto out_overflow;
5729
5730 res->dir = be32_to_cpup(p++);
5731 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5732 return -EIO;
5733 if (be32_to_cpup(p) == 0)
5734 res->use_conn_in_rdma_mode = false;
5735 else
5736 res->use_conn_in_rdma_mode = true;
5737
5738 return 0;
5739 out_overflow:
5740 print_overflow_msg(__func__, xdr);
5741 return -EIO;
5742 }
5743
5744 static int decode_create_session(struct xdr_stream *xdr,
5745 struct nfs41_create_session_res *res)
5746 {
5747 __be32 *p;
5748 int status;
5749
5750 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5751 if (!status)
5752 status = decode_sessionid(xdr, &res->sessionid);
5753 if (unlikely(status))
5754 return status;
5755
5756 /* seqid, flags */
5757 p = xdr_inline_decode(xdr, 8);
5758 if (unlikely(!p))
5759 goto out_overflow;
5760 res->seqid = be32_to_cpup(p++);
5761 res->flags = be32_to_cpup(p);
5762
5763 /* Channel attributes */
5764 status = decode_chan_attrs(xdr, &res->fc_attrs);
5765 if (!status)
5766 status = decode_chan_attrs(xdr, &res->bc_attrs);
5767 return status;
5768 out_overflow:
5769 print_overflow_msg(__func__, xdr);
5770 return -EIO;
5771 }
5772
5773 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5774 {
5775 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5776 }
5777
5778 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5779 {
5780 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5781 }
5782
5783 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5784 {
5785 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5786 }
5787 #endif /* CONFIG_NFS_V4_1 */
5788
5789 static int decode_sequence(struct xdr_stream *xdr,
5790 struct nfs4_sequence_res *res,
5791 struct rpc_rqst *rqstp)
5792 {
5793 #if defined(CONFIG_NFS_V4_1)
5794 struct nfs4_session *session;
5795 struct nfs4_sessionid id;
5796 u32 dummy;
5797 int status;
5798 __be32 *p;
5799
5800 if (res->sr_slot == NULL)
5801 return 0;
5802 if (!res->sr_slot->table->session)
5803 return 0;
5804
5805 status = decode_op_hdr(xdr, OP_SEQUENCE);
5806 if (!status)
5807 status = decode_sessionid(xdr, &id);
5808 if (unlikely(status))
5809 goto out_err;
5810
5811 /*
5812 * If the server returns different values for sessionID, slotID or
5813 * sequence number, the server is looney tunes.
5814 */
5815 status = -EREMOTEIO;
5816 session = res->sr_slot->table->session;
5817
5818 if (memcmp(id.data, session->sess_id.data,
5819 NFS4_MAX_SESSIONID_LEN)) {
5820 dprintk("%s Invalid session id\n", __func__);
5821 goto out_err;
5822 }
5823
5824 p = xdr_inline_decode(xdr, 20);
5825 if (unlikely(!p))
5826 goto out_overflow;
5827
5828 /* seqid */
5829 dummy = be32_to_cpup(p++);
5830 if (dummy != res->sr_slot->seq_nr) {
5831 dprintk("%s Invalid sequence number\n", __func__);
5832 goto out_err;
5833 }
5834 /* slot id */
5835 dummy = be32_to_cpup(p++);
5836 if (dummy != res->sr_slot->slot_nr) {
5837 dprintk("%s Invalid slot id\n", __func__);
5838 goto out_err;
5839 }
5840 /* highest slot id */
5841 res->sr_highest_slotid = be32_to_cpup(p++);
5842 /* target highest slot id */
5843 res->sr_target_highest_slotid = be32_to_cpup(p++);
5844 /* result flags */
5845 res->sr_status_flags = be32_to_cpup(p);
5846 status = 0;
5847 out_err:
5848 res->sr_status = status;
5849 return status;
5850 out_overflow:
5851 print_overflow_msg(__func__, xdr);
5852 status = -EIO;
5853 goto out_err;
5854 #else /* CONFIG_NFS_V4_1 */
5855 return 0;
5856 #endif /* CONFIG_NFS_V4_1 */
5857 }
5858
5859 #if defined(CONFIG_NFS_V4_1)
5860 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5861 {
5862 stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5863 return decode_stateid(xdr, stateid);
5864 }
5865
5866 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5867 struct nfs4_getdeviceinfo_res *res)
5868 {
5869 struct pnfs_device *pdev = res->pdev;
5870 __be32 *p;
5871 uint32_t len, type;
5872 int status;
5873
5874 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5875 if (status) {
5876 if (status == -ETOOSMALL) {
5877 p = xdr_inline_decode(xdr, 4);
5878 if (unlikely(!p))
5879 goto out_overflow;
5880 pdev->mincount = be32_to_cpup(p);
5881 dprintk("%s: Min count too small. mincnt = %u\n",
5882 __func__, pdev->mincount);
5883 }
5884 return status;
5885 }
5886
5887 p = xdr_inline_decode(xdr, 8);
5888 if (unlikely(!p))
5889 goto out_overflow;
5890 type = be32_to_cpup(p++);
5891 if (type != pdev->layout_type) {
5892 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5893 __func__, pdev->layout_type, type);
5894 return -EINVAL;
5895 }
5896 /*
5897 * Get the length of the opaque device_addr4. xdr_read_pages places
5898 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5899 * and places the remaining xdr data in xdr_buf->tail
5900 */
5901 pdev->mincount = be32_to_cpup(p);
5902 if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5903 goto out_overflow;
5904
5905 /* Parse notification bitmap, verifying that it is zero. */
5906 p = xdr_inline_decode(xdr, 4);
5907 if (unlikely(!p))
5908 goto out_overflow;
5909 len = be32_to_cpup(p);
5910 if (len) {
5911 uint32_t i;
5912
5913 p = xdr_inline_decode(xdr, 4 * len);
5914 if (unlikely(!p))
5915 goto out_overflow;
5916
5917 res->notification = be32_to_cpup(p++);
5918 for (i = 1; i < len; i++) {
5919 if (be32_to_cpup(p++)) {
5920 dprintk("%s: unsupported notification\n",
5921 __func__);
5922 return -EIO;
5923 }
5924 }
5925 }
5926 return 0;
5927 out_overflow:
5928 print_overflow_msg(__func__, xdr);
5929 return -EIO;
5930 }
5931
5932 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5933 struct nfs4_layoutget_res *res)
5934 {
5935 __be32 *p;
5936 int status;
5937 u32 layout_count;
5938 u32 recvd;
5939
5940 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5941 if (status)
5942 return status;
5943 p = xdr_inline_decode(xdr, 4);
5944 if (unlikely(!p))
5945 goto out_overflow;
5946 res->return_on_close = be32_to_cpup(p);
5947 decode_layout_stateid(xdr, &res->stateid);
5948 p = xdr_inline_decode(xdr, 4);
5949 if (unlikely(!p))
5950 goto out_overflow;
5951 layout_count = be32_to_cpup(p);
5952 if (!layout_count) {
5953 dprintk("%s: server responded with empty layout array\n",
5954 __func__);
5955 return -EINVAL;
5956 }
5957
5958 p = xdr_inline_decode(xdr, 28);
5959 if (unlikely(!p))
5960 goto out_overflow;
5961 p = xdr_decode_hyper(p, &res->range.offset);
5962 p = xdr_decode_hyper(p, &res->range.length);
5963 res->range.iomode = be32_to_cpup(p++);
5964 res->type = be32_to_cpup(p++);
5965 res->layoutp->len = be32_to_cpup(p);
5966
5967 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5968 __func__,
5969 (unsigned long)res->range.offset,
5970 (unsigned long)res->range.length,
5971 res->range.iomode,
5972 res->type,
5973 res->layoutp->len);
5974
5975 recvd = xdr_read_pages(xdr, res->layoutp->len);
5976 if (res->layoutp->len > recvd) {
5977 dprintk("NFS: server cheating in layoutget reply: "
5978 "layout len %u > recvd %u\n",
5979 res->layoutp->len, recvd);
5980 return -EINVAL;
5981 }
5982
5983 if (layout_count > 1) {
5984 /* We only handle a length one array at the moment. Any
5985 * further entries are just ignored. Note that this means
5986 * the client may see a response that is less than the
5987 * minimum it requested.
5988 */
5989 dprintk("%s: server responded with %d layouts, dropping tail\n",
5990 __func__, layout_count);
5991 }
5992
5993 return 0;
5994 out_overflow:
5995 print_overflow_msg(__func__, xdr);
5996 return -EIO;
5997 }
5998
5999 static int decode_layoutreturn(struct xdr_stream *xdr,
6000 struct nfs4_layoutreturn_res *res)
6001 {
6002 __be32 *p;
6003 int status;
6004
6005 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6006 if (status)
6007 return status;
6008 p = xdr_inline_decode(xdr, 4);
6009 if (unlikely(!p))
6010 goto out_overflow;
6011 res->lrs_present = be32_to_cpup(p);
6012 if (res->lrs_present)
6013 status = decode_layout_stateid(xdr, &res->stateid);
6014 return status;
6015 out_overflow:
6016 print_overflow_msg(__func__, xdr);
6017 return -EIO;
6018 }
6019
6020 static int decode_layoutcommit(struct xdr_stream *xdr,
6021 struct rpc_rqst *req,
6022 struct nfs4_layoutcommit_res *res)
6023 {
6024 __be32 *p;
6025 __u32 sizechanged;
6026 int status;
6027
6028 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6029 res->status = status;
6030 if (status)
6031 return status;
6032
6033 p = xdr_inline_decode(xdr, 4);
6034 if (unlikely(!p))
6035 goto out_overflow;
6036 sizechanged = be32_to_cpup(p);
6037
6038 if (sizechanged) {
6039 /* throw away new size */
6040 p = xdr_inline_decode(xdr, 8);
6041 if (unlikely(!p))
6042 goto out_overflow;
6043 }
6044 return 0;
6045 out_overflow:
6046 print_overflow_msg(__func__, xdr);
6047 return -EIO;
6048 }
6049
6050 static int decode_test_stateid(struct xdr_stream *xdr,
6051 struct nfs41_test_stateid_res *res)
6052 {
6053 __be32 *p;
6054 int status;
6055 int num_res;
6056
6057 status = decode_op_hdr(xdr, OP_TEST_STATEID);
6058 if (status)
6059 return status;
6060
6061 p = xdr_inline_decode(xdr, 4);
6062 if (unlikely(!p))
6063 goto out_overflow;
6064 num_res = be32_to_cpup(p++);
6065 if (num_res != 1)
6066 goto out;
6067
6068 p = xdr_inline_decode(xdr, 4);
6069 if (unlikely(!p))
6070 goto out_overflow;
6071 res->status = be32_to_cpup(p++);
6072
6073 return status;
6074 out_overflow:
6075 print_overflow_msg(__func__, xdr);
6076 out:
6077 return -EIO;
6078 }
6079
6080 static int decode_free_stateid(struct xdr_stream *xdr,
6081 struct nfs41_free_stateid_res *res)
6082 {
6083 res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6084 return res->status;
6085 }
6086 #else
6087 static inline
6088 int decode_layoutreturn(struct xdr_stream *xdr,
6089 struct nfs4_layoutreturn_res *res)
6090 {
6091 return 0;
6092 }
6093 #endif /* CONFIG_NFS_V4_1 */
6094
6095 /*
6096 * END OF "GENERIC" DECODE ROUTINES.
6097 */
6098
6099 /*
6100 * Decode OPEN_DOWNGRADE response
6101 */
6102 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6103 struct xdr_stream *xdr,
6104 struct nfs_closeres *res)
6105 {
6106 struct compound_hdr hdr;
6107 int status;
6108
6109 status = decode_compound_hdr(xdr, &hdr);
6110 if (status)
6111 goto out;
6112 status = decode_sequence(xdr, &res->seq_res, rqstp);
6113 if (status)
6114 goto out;
6115 status = decode_putfh(xdr);
6116 if (status)
6117 goto out;
6118 if (res->lr_res) {
6119 status = decode_layoutreturn(xdr, res->lr_res);
6120 res->lr_ret = status;
6121 if (status)
6122 goto out;
6123 }
6124 status = decode_open_downgrade(xdr, res);
6125 out:
6126 return status;
6127 }
6128
6129 /*
6130 * Decode ACCESS response
6131 */
6132 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6133 struct nfs4_accessres *res)
6134 {
6135 struct compound_hdr hdr;
6136 int status;
6137
6138 status = decode_compound_hdr(xdr, &hdr);
6139 if (status)
6140 goto out;
6141 status = decode_sequence(xdr, &res->seq_res, rqstp);
6142 if (status)
6143 goto out;
6144 status = decode_putfh(xdr);
6145 if (status != 0)
6146 goto out;
6147 status = decode_access(xdr, &res->supported, &res->access);
6148 if (status != 0)
6149 goto out;
6150 decode_getfattr(xdr, res->fattr, res->server);
6151 out:
6152 return status;
6153 }
6154
6155 /*
6156 * Decode LOOKUP response
6157 */
6158 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6159 struct nfs4_lookup_res *res)
6160 {
6161 struct compound_hdr hdr;
6162 int status;
6163
6164 status = decode_compound_hdr(xdr, &hdr);
6165 if (status)
6166 goto out;
6167 status = decode_sequence(xdr, &res->seq_res, rqstp);
6168 if (status)
6169 goto out;
6170 status = decode_putfh(xdr);
6171 if (status)
6172 goto out;
6173 status = decode_lookup(xdr);
6174 if (status)
6175 goto out;
6176 status = decode_getfh(xdr, res->fh);
6177 if (status)
6178 goto out;
6179 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6180 out:
6181 return status;
6182 }
6183
6184 /*
6185 * Decode LOOKUP_ROOT response
6186 */
6187 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6188 struct xdr_stream *xdr,
6189 struct nfs4_lookup_res *res)
6190 {
6191 struct compound_hdr hdr;
6192 int status;
6193
6194 status = decode_compound_hdr(xdr, &hdr);
6195 if (status)
6196 goto out;
6197 status = decode_sequence(xdr, &res->seq_res, rqstp);
6198 if (status)
6199 goto out;
6200 status = decode_putrootfh(xdr);
6201 if (status)
6202 goto out;
6203 status = decode_getfh(xdr, res->fh);
6204 if (status == 0)
6205 status = decode_getfattr_label(xdr, res->fattr,
6206 res->label, res->server);
6207 out:
6208 return status;
6209 }
6210
6211 /*
6212 * Decode REMOVE response
6213 */
6214 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6215 struct nfs_removeres *res)
6216 {
6217 struct compound_hdr hdr;
6218 int status;
6219
6220 status = decode_compound_hdr(xdr, &hdr);
6221 if (status)
6222 goto out;
6223 status = decode_sequence(xdr, &res->seq_res, rqstp);
6224 if (status)
6225 goto out;
6226 status = decode_putfh(xdr);
6227 if (status)
6228 goto out;
6229 status = decode_remove(xdr, &res->cinfo);
6230 out:
6231 return status;
6232 }
6233
6234 /*
6235 * Decode RENAME response
6236 */
6237 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6238 struct nfs_renameres *res)
6239 {
6240 struct compound_hdr hdr;
6241 int status;
6242
6243 status = decode_compound_hdr(xdr, &hdr);
6244 if (status)
6245 goto out;
6246 status = decode_sequence(xdr, &res->seq_res, rqstp);
6247 if (status)
6248 goto out;
6249 status = decode_putfh(xdr);
6250 if (status)
6251 goto out;
6252 status = decode_savefh(xdr);
6253 if (status)
6254 goto out;
6255 status = decode_putfh(xdr);
6256 if (status)
6257 goto out;
6258 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6259 out:
6260 return status;
6261 }
6262
6263 /*
6264 * Decode LINK response
6265 */
6266 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6267 struct nfs4_link_res *res)
6268 {
6269 struct compound_hdr hdr;
6270 int status;
6271
6272 status = decode_compound_hdr(xdr, &hdr);
6273 if (status)
6274 goto out;
6275 status = decode_sequence(xdr, &res->seq_res, rqstp);
6276 if (status)
6277 goto out;
6278 status = decode_putfh(xdr);
6279 if (status)
6280 goto out;
6281 status = decode_savefh(xdr);
6282 if (status)
6283 goto out;
6284 status = decode_putfh(xdr);
6285 if (status)
6286 goto out;
6287 status = decode_link(xdr, &res->cinfo);
6288 if (status)
6289 goto out;
6290 /*
6291 * Note order: OP_LINK leaves the directory as the current
6292 * filehandle.
6293 */
6294 status = decode_restorefh(xdr);
6295 if (status)
6296 goto out;
6297 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6298 out:
6299 return status;
6300 }
6301
6302 /*
6303 * Decode CREATE response
6304 */
6305 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6306 struct nfs4_create_res *res)
6307 {
6308 struct compound_hdr hdr;
6309 int status;
6310
6311 status = decode_compound_hdr(xdr, &hdr);
6312 if (status)
6313 goto out;
6314 status = decode_sequence(xdr, &res->seq_res, rqstp);
6315 if (status)
6316 goto out;
6317 status = decode_putfh(xdr);
6318 if (status)
6319 goto out;
6320 status = decode_create(xdr, &res->dir_cinfo);
6321 if (status)
6322 goto out;
6323 status = decode_getfh(xdr, res->fh);
6324 if (status)
6325 goto out;
6326 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6327 out:
6328 return status;
6329 }
6330
6331 /*
6332 * Decode SYMLINK response
6333 */
6334 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6335 struct nfs4_create_res *res)
6336 {
6337 return nfs4_xdr_dec_create(rqstp, xdr, res);
6338 }
6339
6340 /*
6341 * Decode GETATTR response
6342 */
6343 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6344 struct nfs4_getattr_res *res)
6345 {
6346 struct compound_hdr hdr;
6347 int status;
6348
6349 status = decode_compound_hdr(xdr, &hdr);
6350 if (status)
6351 goto out;
6352 status = decode_sequence(xdr, &res->seq_res, rqstp);
6353 if (status)
6354 goto out;
6355 status = decode_putfh(xdr);
6356 if (status)
6357 goto out;
6358 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6359 out:
6360 return status;
6361 }
6362
6363 /*
6364 * Encode an SETACL request
6365 */
6366 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6367 struct nfs_setaclargs *args)
6368 {
6369 struct compound_hdr hdr = {
6370 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6371 };
6372
6373 encode_compound_hdr(xdr, req, &hdr);
6374 encode_sequence(xdr, &args->seq_args, &hdr);
6375 encode_putfh(xdr, args->fh, &hdr);
6376 encode_setacl(xdr, args, &hdr);
6377 encode_nops(&hdr);
6378 }
6379
6380 /*
6381 * Decode SETACL response
6382 */
6383 static int
6384 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6385 struct nfs_setaclres *res)
6386 {
6387 struct compound_hdr hdr;
6388 int status;
6389
6390 status = decode_compound_hdr(xdr, &hdr);
6391 if (status)
6392 goto out;
6393 status = decode_sequence(xdr, &res->seq_res, rqstp);
6394 if (status)
6395 goto out;
6396 status = decode_putfh(xdr);
6397 if (status)
6398 goto out;
6399 status = decode_setattr(xdr);
6400 out:
6401 return status;
6402 }
6403
6404 /*
6405 * Decode GETACL response
6406 */
6407 static int
6408 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6409 struct nfs_getaclres *res)
6410 {
6411 struct compound_hdr hdr;
6412 int status;
6413
6414 if (res->acl_scratch != NULL) {
6415 void *p = page_address(res->acl_scratch);
6416 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6417 }
6418 status = decode_compound_hdr(xdr, &hdr);
6419 if (status)
6420 goto out;
6421 status = decode_sequence(xdr, &res->seq_res, rqstp);
6422 if (status)
6423 goto out;
6424 status = decode_putfh(xdr);
6425 if (status)
6426 goto out;
6427 status = decode_getacl(xdr, rqstp, res);
6428
6429 out:
6430 return status;
6431 }
6432
6433 /*
6434 * Decode CLOSE response
6435 */
6436 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6437 struct nfs_closeres *res)
6438 {
6439 struct compound_hdr hdr;
6440 int status;
6441
6442 status = decode_compound_hdr(xdr, &hdr);
6443 if (status)
6444 goto out;
6445 status = decode_sequence(xdr, &res->seq_res, rqstp);
6446 if (status)
6447 goto out;
6448 status = decode_putfh(xdr);
6449 if (status)
6450 goto out;
6451 if (res->lr_res) {
6452 status = decode_layoutreturn(xdr, res->lr_res);
6453 res->lr_ret = status;
6454 if (status)
6455 goto out;
6456 }
6457 if (res->fattr != NULL) {
6458 status = decode_getfattr(xdr, res->fattr, res->server);
6459 if (status != 0)
6460 goto out;
6461 }
6462 status = decode_close(xdr, res);
6463 out:
6464 return status;
6465 }
6466
6467 /*
6468 * Decode OPEN response
6469 */
6470 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6471 struct nfs_openres *res)
6472 {
6473 struct compound_hdr hdr;
6474 int status;
6475
6476 status = decode_compound_hdr(xdr, &hdr);
6477 if (status)
6478 goto out;
6479 status = decode_sequence(xdr, &res->seq_res, rqstp);
6480 if (status)
6481 goto out;
6482 status = decode_putfh(xdr);
6483 if (status)
6484 goto out;
6485 status = decode_open(xdr, res);
6486 if (status)
6487 goto out;
6488 status = decode_getfh(xdr, &res->fh);
6489 if (status)
6490 goto out;
6491 if (res->access_request)
6492 decode_access(xdr, &res->access_supported, &res->access_result);
6493 decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6494 out:
6495 return status;
6496 }
6497
6498 /*
6499 * Decode OPEN_CONFIRM response
6500 */
6501 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6502 struct xdr_stream *xdr,
6503 struct nfs_open_confirmres *res)
6504 {
6505 struct compound_hdr hdr;
6506 int status;
6507
6508 status = decode_compound_hdr(xdr, &hdr);
6509 if (status)
6510 goto out;
6511 status = decode_putfh(xdr);
6512 if (status)
6513 goto out;
6514 status = decode_open_confirm(xdr, res);
6515 out:
6516 return status;
6517 }
6518
6519 /*
6520 * Decode OPEN response
6521 */
6522 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6523 struct xdr_stream *xdr,
6524 struct nfs_openres *res)
6525 {
6526 struct compound_hdr hdr;
6527 int status;
6528
6529 status = decode_compound_hdr(xdr, &hdr);
6530 if (status)
6531 goto out;
6532 status = decode_sequence(xdr, &res->seq_res, rqstp);
6533 if (status)
6534 goto out;
6535 status = decode_putfh(xdr);
6536 if (status)
6537 goto out;
6538 status = decode_open(xdr, res);
6539 if (status)
6540 goto out;
6541 if (res->access_request)
6542 decode_access(xdr, &res->access_supported, &res->access_result);
6543 decode_getfattr(xdr, res->f_attr, res->server);
6544 out:
6545 return status;
6546 }
6547
6548 /*
6549 * Decode SETATTR response
6550 */
6551 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6552 struct xdr_stream *xdr,
6553 struct nfs_setattrres *res)
6554 {
6555 struct compound_hdr hdr;
6556 int status;
6557
6558 status = decode_compound_hdr(xdr, &hdr);
6559 if (status)
6560 goto out;
6561 status = decode_sequence(xdr, &res->seq_res, rqstp);
6562 if (status)
6563 goto out;
6564 status = decode_putfh(xdr);
6565 if (status)
6566 goto out;
6567 status = decode_setattr(xdr);
6568 if (status)
6569 goto out;
6570 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6571 out:
6572 return status;
6573 }
6574
6575 /*
6576 * Decode LOCK response
6577 */
6578 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6579 struct nfs_lock_res *res)
6580 {
6581 struct compound_hdr hdr;
6582 int status;
6583
6584 status = decode_compound_hdr(xdr, &hdr);
6585 if (status)
6586 goto out;
6587 status = decode_sequence(xdr, &res->seq_res, rqstp);
6588 if (status)
6589 goto out;
6590 status = decode_putfh(xdr);
6591 if (status)
6592 goto out;
6593 status = decode_lock(xdr, res);
6594 out:
6595 return status;
6596 }
6597
6598 /*
6599 * Decode LOCKT response
6600 */
6601 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6602 struct nfs_lockt_res *res)
6603 {
6604 struct compound_hdr hdr;
6605 int status;
6606
6607 status = decode_compound_hdr(xdr, &hdr);
6608 if (status)
6609 goto out;
6610 status = decode_sequence(xdr, &res->seq_res, rqstp);
6611 if (status)
6612 goto out;
6613 status = decode_putfh(xdr);
6614 if (status)
6615 goto out;
6616 status = decode_lockt(xdr, res);
6617 out:
6618 return status;
6619 }
6620
6621 /*
6622 * Decode LOCKU response
6623 */
6624 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6625 struct nfs_locku_res *res)
6626 {
6627 struct compound_hdr hdr;
6628 int status;
6629
6630 status = decode_compound_hdr(xdr, &hdr);
6631 if (status)
6632 goto out;
6633 status = decode_sequence(xdr, &res->seq_res, rqstp);
6634 if (status)
6635 goto out;
6636 status = decode_putfh(xdr);
6637 if (status)
6638 goto out;
6639 status = decode_locku(xdr, res);
6640 out:
6641 return status;
6642 }
6643
6644 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6645 struct xdr_stream *xdr, void *dummy)
6646 {
6647 struct compound_hdr hdr;
6648 int status;
6649
6650 status = decode_compound_hdr(xdr, &hdr);
6651 if (!status)
6652 status = decode_release_lockowner(xdr);
6653 return status;
6654 }
6655
6656 /*
6657 * Decode READLINK response
6658 */
6659 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6660 struct xdr_stream *xdr,
6661 struct nfs4_readlink_res *res)
6662 {
6663 struct compound_hdr hdr;
6664 int status;
6665
6666 status = decode_compound_hdr(xdr, &hdr);
6667 if (status)
6668 goto out;
6669 status = decode_sequence(xdr, &res->seq_res, rqstp);
6670 if (status)
6671 goto out;
6672 status = decode_putfh(xdr);
6673 if (status)
6674 goto out;
6675 status = decode_readlink(xdr, rqstp);
6676 out:
6677 return status;
6678 }
6679
6680 /*
6681 * Decode READDIR response
6682 */
6683 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6684 struct nfs4_readdir_res *res)
6685 {
6686 struct compound_hdr hdr;
6687 int status;
6688
6689 status = decode_compound_hdr(xdr, &hdr);
6690 if (status)
6691 goto out;
6692 status = decode_sequence(xdr, &res->seq_res, rqstp);
6693 if (status)
6694 goto out;
6695 status = decode_putfh(xdr);
6696 if (status)
6697 goto out;
6698 status = decode_readdir(xdr, rqstp, res);
6699 out:
6700 return status;
6701 }
6702
6703 /*
6704 * Decode Read response
6705 */
6706 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6707 struct nfs_pgio_res *res)
6708 {
6709 struct compound_hdr hdr;
6710 int status;
6711
6712 status = decode_compound_hdr(xdr, &hdr);
6713 res->op_status = hdr.status;
6714 if (status)
6715 goto out;
6716 status = decode_sequence(xdr, &res->seq_res, rqstp);
6717 if (status)
6718 goto out;
6719 status = decode_putfh(xdr);
6720 if (status)
6721 goto out;
6722 status = decode_read(xdr, rqstp, res);
6723 if (!status)
6724 status = res->count;
6725 out:
6726 return status;
6727 }
6728
6729 /*
6730 * Decode WRITE response
6731 */
6732 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6733 struct nfs_pgio_res *res)
6734 {
6735 struct compound_hdr hdr;
6736 int status;
6737
6738 status = decode_compound_hdr(xdr, &hdr);
6739 res->op_status = hdr.status;
6740 if (status)
6741 goto out;
6742 status = decode_sequence(xdr, &res->seq_res, rqstp);
6743 if (status)
6744 goto out;
6745 status = decode_putfh(xdr);
6746 if (status)
6747 goto out;
6748 status = decode_write(xdr, res);
6749 if (status)
6750 goto out;
6751 if (res->fattr)
6752 decode_getfattr(xdr, res->fattr, res->server);
6753 if (!status)
6754 status = res->count;
6755 out:
6756 return status;
6757 }
6758
6759 /*
6760 * Decode COMMIT response
6761 */
6762 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6763 struct nfs_commitres *res)
6764 {
6765 struct compound_hdr hdr;
6766 int status;
6767
6768 status = decode_compound_hdr(xdr, &hdr);
6769 res->op_status = hdr.status;
6770 if (status)
6771 goto out;
6772 status = decode_sequence(xdr, &res->seq_res, rqstp);
6773 if (status)
6774 goto out;
6775 status = decode_putfh(xdr);
6776 if (status)
6777 goto out;
6778 status = decode_commit(xdr, res);
6779 out:
6780 return status;
6781 }
6782
6783 /*
6784 * Decode FSINFO response
6785 */
6786 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6787 struct nfs4_fsinfo_res *res)
6788 {
6789 struct compound_hdr hdr;
6790 int status;
6791
6792 status = decode_compound_hdr(xdr, &hdr);
6793 if (!status)
6794 status = decode_sequence(xdr, &res->seq_res, req);
6795 if (!status)
6796 status = decode_putfh(xdr);
6797 if (!status)
6798 status = decode_fsinfo(xdr, res->fsinfo);
6799 return status;
6800 }
6801
6802 /*
6803 * Decode PATHCONF response
6804 */
6805 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6806 struct nfs4_pathconf_res *res)
6807 {
6808 struct compound_hdr hdr;
6809 int status;
6810
6811 status = decode_compound_hdr(xdr, &hdr);
6812 if (!status)
6813 status = decode_sequence(xdr, &res->seq_res, req);
6814 if (!status)
6815 status = decode_putfh(xdr);
6816 if (!status)
6817 status = decode_pathconf(xdr, res->pathconf);
6818 return status;
6819 }
6820
6821 /*
6822 * Decode STATFS response
6823 */
6824 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6825 struct nfs4_statfs_res *res)
6826 {
6827 struct compound_hdr hdr;
6828 int status;
6829
6830 status = decode_compound_hdr(xdr, &hdr);
6831 if (!status)
6832 status = decode_sequence(xdr, &res->seq_res, req);
6833 if (!status)
6834 status = decode_putfh(xdr);
6835 if (!status)
6836 status = decode_statfs(xdr, res->fsstat);
6837 return status;
6838 }
6839
6840 /*
6841 * Decode GETATTR_BITMAP response
6842 */
6843 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6844 struct xdr_stream *xdr,
6845 struct nfs4_server_caps_res *res)
6846 {
6847 struct compound_hdr hdr;
6848 int status;
6849
6850 status = decode_compound_hdr(xdr, &hdr);
6851 if (status)
6852 goto out;
6853 status = decode_sequence(xdr, &res->seq_res, req);
6854 if (status)
6855 goto out;
6856 status = decode_putfh(xdr);
6857 if (status)
6858 goto out;
6859 status = decode_server_caps(xdr, res);
6860 out:
6861 return status;
6862 }
6863
6864 /*
6865 * Decode RENEW response
6866 */
6867 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6868 void *__unused)
6869 {
6870 struct compound_hdr hdr;
6871 int status;
6872
6873 status = decode_compound_hdr(xdr, &hdr);
6874 if (!status)
6875 status = decode_renew(xdr);
6876 return status;
6877 }
6878
6879 /*
6880 * Decode SETCLIENTID response
6881 */
6882 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6883 struct xdr_stream *xdr,
6884 struct nfs4_setclientid_res *res)
6885 {
6886 struct compound_hdr hdr;
6887 int status;
6888
6889 status = decode_compound_hdr(xdr, &hdr);
6890 if (!status)
6891 status = decode_setclientid(xdr, res);
6892 return status;
6893 }
6894
6895 /*
6896 * Decode SETCLIENTID_CONFIRM response
6897 */
6898 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6899 struct xdr_stream *xdr)
6900 {
6901 struct compound_hdr hdr;
6902 int status;
6903
6904 status = decode_compound_hdr(xdr, &hdr);
6905 if (!status)
6906 status = decode_setclientid_confirm(xdr);
6907 return status;
6908 }
6909
6910 /*
6911 * Decode DELEGRETURN response
6912 */
6913 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6914 struct xdr_stream *xdr,
6915 struct nfs4_delegreturnres *res)
6916 {
6917 struct compound_hdr hdr;
6918 int status;
6919
6920 status = decode_compound_hdr(xdr, &hdr);
6921 if (status)
6922 goto out;
6923 status = decode_sequence(xdr, &res->seq_res, rqstp);
6924 if (status)
6925 goto out;
6926 status = decode_putfh(xdr);
6927 if (status != 0)
6928 goto out;
6929 if (res->lr_res) {
6930 status = decode_layoutreturn(xdr, res->lr_res);
6931 res->lr_ret = status;
6932 if (status)
6933 goto out;
6934 }
6935 if (res->fattr) {
6936 status = decode_getfattr(xdr, res->fattr, res->server);
6937 if (status != 0)
6938 goto out;
6939 }
6940 status = decode_delegreturn(xdr);
6941 out:
6942 return status;
6943 }
6944
6945 /*
6946 * Decode FS_LOCATIONS response
6947 */
6948 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6949 struct xdr_stream *xdr,
6950 struct nfs4_fs_locations_res *res)
6951 {
6952 struct compound_hdr hdr;
6953 int status;
6954
6955 status = decode_compound_hdr(xdr, &hdr);
6956 if (status)
6957 goto out;
6958 status = decode_sequence(xdr, &res->seq_res, req);
6959 if (status)
6960 goto out;
6961 status = decode_putfh(xdr);
6962 if (status)
6963 goto out;
6964 if (res->migration) {
6965 xdr_enter_page(xdr, PAGE_SIZE);
6966 status = decode_getfattr_generic(xdr,
6967 &res->fs_locations->fattr,
6968 NULL, res->fs_locations,
6969 NULL, res->fs_locations->server);
6970 if (status)
6971 goto out;
6972 if (res->renew)
6973 status = decode_renew(xdr);
6974 } else {
6975 status = decode_lookup(xdr);
6976 if (status)
6977 goto out;
6978 xdr_enter_page(xdr, PAGE_SIZE);
6979 status = decode_getfattr_generic(xdr,
6980 &res->fs_locations->fattr,
6981 NULL, res->fs_locations,
6982 NULL, res->fs_locations->server);
6983 }
6984 out:
6985 return status;
6986 }
6987
6988 /*
6989 * Decode SECINFO response
6990 */
6991 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6992 struct xdr_stream *xdr,
6993 struct nfs4_secinfo_res *res)
6994 {
6995 struct compound_hdr hdr;
6996 int status;
6997
6998 status = decode_compound_hdr(xdr, &hdr);
6999 if (status)
7000 goto out;
7001 status = decode_sequence(xdr, &res->seq_res, rqstp);
7002 if (status)
7003 goto out;
7004 status = decode_putfh(xdr);
7005 if (status)
7006 goto out;
7007 status = decode_secinfo(xdr, res);
7008 out:
7009 return status;
7010 }
7011
7012 /*
7013 * Decode FSID_PRESENT response
7014 */
7015 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7016 struct xdr_stream *xdr,
7017 struct nfs4_fsid_present_res *res)
7018 {
7019 struct compound_hdr hdr;
7020 int status;
7021
7022 status = decode_compound_hdr(xdr, &hdr);
7023 if (status)
7024 goto out;
7025 status = decode_sequence(xdr, &res->seq_res, rqstp);
7026 if (status)
7027 goto out;
7028 status = decode_putfh(xdr);
7029 if (status)
7030 goto out;
7031 status = decode_getfh(xdr, res->fh);
7032 if (status)
7033 goto out;
7034 if (res->renew)
7035 status = decode_renew(xdr);
7036 out:
7037 return status;
7038 }
7039
7040 #if defined(CONFIG_NFS_V4_1)
7041 /*
7042 * Decode BIND_CONN_TO_SESSION response
7043 */
7044 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7045 struct xdr_stream *xdr,
7046 void *res)
7047 {
7048 struct compound_hdr hdr;
7049 int status;
7050
7051 status = decode_compound_hdr(xdr, &hdr);
7052 if (!status)
7053 status = decode_bind_conn_to_session(xdr, res);
7054 return status;
7055 }
7056
7057 /*
7058 * Decode EXCHANGE_ID response
7059 */
7060 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7061 struct xdr_stream *xdr,
7062 void *res)
7063 {
7064 struct compound_hdr hdr;
7065 int status;
7066
7067 status = decode_compound_hdr(xdr, &hdr);
7068 if (!status)
7069 status = decode_exchange_id(xdr, res);
7070 return status;
7071 }
7072
7073 /*
7074 * Decode CREATE_SESSION response
7075 */
7076 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7077 struct xdr_stream *xdr,
7078 struct nfs41_create_session_res *res)
7079 {
7080 struct compound_hdr hdr;
7081 int status;
7082
7083 status = decode_compound_hdr(xdr, &hdr);
7084 if (!status)
7085 status = decode_create_session(xdr, res);
7086 return status;
7087 }
7088
7089 /*
7090 * Decode DESTROY_SESSION response
7091 */
7092 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7093 struct xdr_stream *xdr,
7094 void *res)
7095 {
7096 struct compound_hdr hdr;
7097 int status;
7098
7099 status = decode_compound_hdr(xdr, &hdr);
7100 if (!status)
7101 status = decode_destroy_session(xdr, res);
7102 return status;
7103 }
7104
7105 /*
7106 * Decode DESTROY_CLIENTID response
7107 */
7108 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7109 struct xdr_stream *xdr,
7110 void *res)
7111 {
7112 struct compound_hdr hdr;
7113 int status;
7114
7115 status = decode_compound_hdr(xdr, &hdr);
7116 if (!status)
7117 status = decode_destroy_clientid(xdr, res);
7118 return status;
7119 }
7120
7121 /*
7122 * Decode SEQUENCE response
7123 */
7124 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7125 struct xdr_stream *xdr,
7126 struct nfs4_sequence_res *res)
7127 {
7128 struct compound_hdr hdr;
7129 int status;
7130
7131 status = decode_compound_hdr(xdr, &hdr);
7132 if (!status)
7133 status = decode_sequence(xdr, res, rqstp);
7134 return status;
7135 }
7136
7137 /*
7138 * Decode GET_LEASE_TIME response
7139 */
7140 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7141 struct xdr_stream *xdr,
7142 struct nfs4_get_lease_time_res *res)
7143 {
7144 struct compound_hdr hdr;
7145 int status;
7146
7147 status = decode_compound_hdr(xdr, &hdr);
7148 if (!status)
7149 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7150 if (!status)
7151 status = decode_putrootfh(xdr);
7152 if (!status)
7153 status = decode_fsinfo(xdr, res->lr_fsinfo);
7154 return status;
7155 }
7156
7157 /*
7158 * Decode RECLAIM_COMPLETE response
7159 */
7160 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7161 struct xdr_stream *xdr,
7162 struct nfs41_reclaim_complete_res *res)
7163 {
7164 struct compound_hdr hdr;
7165 int status;
7166
7167 status = decode_compound_hdr(xdr, &hdr);
7168 if (!status)
7169 status = decode_sequence(xdr, &res->seq_res, rqstp);
7170 if (!status)
7171 status = decode_reclaim_complete(xdr, NULL);
7172 return status;
7173 }
7174
7175 /*
7176 * Decode GETDEVINFO response
7177 */
7178 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7179 struct xdr_stream *xdr,
7180 struct nfs4_getdeviceinfo_res *res)
7181 {
7182 struct compound_hdr hdr;
7183 int status;
7184
7185 status = decode_compound_hdr(xdr, &hdr);
7186 if (status != 0)
7187 goto out;
7188 status = decode_sequence(xdr, &res->seq_res, rqstp);
7189 if (status != 0)
7190 goto out;
7191 status = decode_getdeviceinfo(xdr, res);
7192 out:
7193 return status;
7194 }
7195
7196 /*
7197 * Decode LAYOUTGET response
7198 */
7199 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7200 struct xdr_stream *xdr,
7201 struct nfs4_layoutget_res *res)
7202 {
7203 struct compound_hdr hdr;
7204 int status;
7205
7206 status = decode_compound_hdr(xdr, &hdr);
7207 if (status)
7208 goto out;
7209 status = decode_sequence(xdr, &res->seq_res, rqstp);
7210 if (status)
7211 goto out;
7212 status = decode_putfh(xdr);
7213 if (status)
7214 goto out;
7215 status = decode_layoutget(xdr, rqstp, res);
7216 out:
7217 return status;
7218 }
7219
7220 /*
7221 * Decode LAYOUTRETURN response
7222 */
7223 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7224 struct xdr_stream *xdr,
7225 struct nfs4_layoutreturn_res *res)
7226 {
7227 struct compound_hdr hdr;
7228 int status;
7229
7230 status = decode_compound_hdr(xdr, &hdr);
7231 if (status)
7232 goto out;
7233 status = decode_sequence(xdr, &res->seq_res, rqstp);
7234 if (status)
7235 goto out;
7236 status = decode_putfh(xdr);
7237 if (status)
7238 goto out;
7239 status = decode_layoutreturn(xdr, res);
7240 out:
7241 return status;
7242 }
7243
7244 /*
7245 * Decode LAYOUTCOMMIT response
7246 */
7247 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7248 struct xdr_stream *xdr,
7249 struct nfs4_layoutcommit_res *res)
7250 {
7251 struct compound_hdr hdr;
7252 int status;
7253
7254 status = decode_compound_hdr(xdr, &hdr);
7255 if (status)
7256 goto out;
7257 status = decode_sequence(xdr, &res->seq_res, rqstp);
7258 if (status)
7259 goto out;
7260 status = decode_putfh(xdr);
7261 if (status)
7262 goto out;
7263 status = decode_layoutcommit(xdr, rqstp, res);
7264 if (status)
7265 goto out;
7266 decode_getfattr(xdr, res->fattr, res->server);
7267 out:
7268 return status;
7269 }
7270
7271 /*
7272 * Decode SECINFO_NO_NAME response
7273 */
7274 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7275 struct xdr_stream *xdr,
7276 struct nfs4_secinfo_res *res)
7277 {
7278 struct compound_hdr hdr;
7279 int status;
7280
7281 status = decode_compound_hdr(xdr, &hdr);
7282 if (status)
7283 goto out;
7284 status = decode_sequence(xdr, &res->seq_res, rqstp);
7285 if (status)
7286 goto out;
7287 status = decode_putrootfh(xdr);
7288 if (status)
7289 goto out;
7290 status = decode_secinfo_no_name(xdr, res);
7291 out:
7292 return status;
7293 }
7294
7295 /*
7296 * Decode TEST_STATEID response
7297 */
7298 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7299 struct xdr_stream *xdr,
7300 struct nfs41_test_stateid_res *res)
7301 {
7302 struct compound_hdr hdr;
7303 int status;
7304
7305 status = decode_compound_hdr(xdr, &hdr);
7306 if (status)
7307 goto out;
7308 status = decode_sequence(xdr, &res->seq_res, rqstp);
7309 if (status)
7310 goto out;
7311 status = decode_test_stateid(xdr, res);
7312 out:
7313 return status;
7314 }
7315
7316 /*
7317 * Decode FREE_STATEID response
7318 */
7319 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7320 struct xdr_stream *xdr,
7321 struct nfs41_free_stateid_res *res)
7322 {
7323 struct compound_hdr hdr;
7324 int status;
7325
7326 status = decode_compound_hdr(xdr, &hdr);
7327 if (status)
7328 goto out;
7329 status = decode_sequence(xdr, &res->seq_res, rqstp);
7330 if (status)
7331 goto out;
7332 status = decode_free_stateid(xdr, res);
7333 out:
7334 return status;
7335 }
7336 #endif /* CONFIG_NFS_V4_1 */
7337
7338 /**
7339 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7340 * the local page cache.
7341 * @xdr: XDR stream where entry resides
7342 * @entry: buffer to fill in with entry data
7343 * @plus: boolean indicating whether this should be a readdirplus entry
7344 *
7345 * Returns zero if successful, otherwise a negative errno value is
7346 * returned.
7347 *
7348 * This function is not invoked during READDIR reply decoding, but
7349 * rather whenever an application invokes the getdents(2) system call
7350 * on a directory already in our cache.
7351 */
7352 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7353 int plus)
7354 {
7355 unsigned int savep;
7356 uint32_t bitmap[3] = {0};
7357 uint32_t len;
7358 __be32 *p = xdr_inline_decode(xdr, 4);
7359 if (unlikely(!p))
7360 goto out_overflow;
7361 if (*p == xdr_zero) {
7362 p = xdr_inline_decode(xdr, 4);
7363 if (unlikely(!p))
7364 goto out_overflow;
7365 if (*p == xdr_zero)
7366 return -EAGAIN;
7367 entry->eof = 1;
7368 return -EBADCOOKIE;
7369 }
7370
7371 p = xdr_inline_decode(xdr, 12);
7372 if (unlikely(!p))
7373 goto out_overflow;
7374 entry->prev_cookie = entry->cookie;
7375 p = xdr_decode_hyper(p, &entry->cookie);
7376 entry->len = be32_to_cpup(p);
7377
7378 p = xdr_inline_decode(xdr, entry->len);
7379 if (unlikely(!p))
7380 goto out_overflow;
7381 entry->name = (const char *) p;
7382
7383 /*
7384 * In case the server doesn't return an inode number,
7385 * we fake one here. (We don't use inode number 0,
7386 * since glibc seems to choke on it...)
7387 */
7388 entry->ino = 1;
7389 entry->fattr->valid = 0;
7390
7391 if (decode_attr_bitmap(xdr, bitmap) < 0)
7392 goto out_overflow;
7393
7394 if (decode_attr_length(xdr, &len, &savep) < 0)
7395 goto out_overflow;
7396
7397 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7398 NULL, entry->label, entry->server) < 0)
7399 goto out_overflow;
7400 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7401 entry->ino = entry->fattr->mounted_on_fileid;
7402 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7403 entry->ino = entry->fattr->fileid;
7404
7405 entry->d_type = DT_UNKNOWN;
7406 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7407 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7408
7409 return 0;
7410
7411 out_overflow:
7412 print_overflow_msg(__func__, xdr);
7413 return -EAGAIN;
7414 }
7415
7416 /*
7417 * We need to translate between nfs status return values and
7418 * the local errno values which may not be the same.
7419 */
7420 static struct {
7421 int stat;
7422 int errno;
7423 } nfs_errtbl[] = {
7424 { NFS4_OK, 0 },
7425 { NFS4ERR_PERM, -EPERM },
7426 { NFS4ERR_NOENT, -ENOENT },
7427 { NFS4ERR_IO, -errno_NFSERR_IO},
7428 { NFS4ERR_NXIO, -ENXIO },
7429 { NFS4ERR_ACCESS, -EACCES },
7430 { NFS4ERR_EXIST, -EEXIST },
7431 { NFS4ERR_XDEV, -EXDEV },
7432 { NFS4ERR_NOTDIR, -ENOTDIR },
7433 { NFS4ERR_ISDIR, -EISDIR },
7434 { NFS4ERR_INVAL, -EINVAL },
7435 { NFS4ERR_FBIG, -EFBIG },
7436 { NFS4ERR_NOSPC, -ENOSPC },
7437 { NFS4ERR_ROFS, -EROFS },
7438 { NFS4ERR_MLINK, -EMLINK },
7439 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7440 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7441 { NFS4ERR_DQUOT, -EDQUOT },
7442 { NFS4ERR_STALE, -ESTALE },
7443 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7444 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7445 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7446 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7447 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7448 { NFS4ERR_BADTYPE, -EBADTYPE },
7449 { NFS4ERR_LOCKED, -EAGAIN },
7450 { NFS4ERR_SYMLINK, -ELOOP },
7451 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7452 { NFS4ERR_DEADLOCK, -EDEADLK },
7453 { -1, -EIO }
7454 };
7455
7456 /*
7457 * Convert an NFS error code to a local one.
7458 * This one is used jointly by NFSv2 and NFSv3.
7459 */
7460 static int
7461 nfs4_stat_to_errno(int stat)
7462 {
7463 int i;
7464 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7465 if (nfs_errtbl[i].stat == stat)
7466 return nfs_errtbl[i].errno;
7467 }
7468 if (stat <= 10000 || stat > 10100) {
7469 /* The server is looney tunes. */
7470 return -EREMOTEIO;
7471 }
7472 /* If we cannot translate the error, the recovery routines should
7473 * handle it.
7474 * Note: remaining NFSv4 error codes have values > 10000, so should
7475 * not conflict with native Linux error codes.
7476 */
7477 return -stat;
7478 }
7479
7480 #ifdef CONFIG_NFS_V4_2
7481 #include "nfs42xdr.c"
7482 #endif /* CONFIG_NFS_V4_2 */
7483
7484 #define PROC(proc, argtype, restype) \
7485 [NFSPROC4_CLNT_##proc] = { \
7486 .p_proc = NFSPROC4_COMPOUND, \
7487 .p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \
7488 .p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \
7489 .p_arglen = NFS4_##argtype##_sz, \
7490 .p_replen = NFS4_##restype##_sz, \
7491 .p_statidx = NFSPROC4_CLNT_##proc, \
7492 .p_name = #proc, \
7493 }
7494
7495 #define STUB(proc) \
7496 [NFSPROC4_CLNT_##proc] = { \
7497 .p_name = #proc, \
7498 }
7499
7500 struct rpc_procinfo nfs4_procedures[] = {
7501 PROC(READ, enc_read, dec_read),
7502 PROC(WRITE, enc_write, dec_write),
7503 PROC(COMMIT, enc_commit, dec_commit),
7504 PROC(OPEN, enc_open, dec_open),
7505 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7506 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7507 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7508 PROC(CLOSE, enc_close, dec_close),
7509 PROC(SETATTR, enc_setattr, dec_setattr),
7510 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7511 PROC(RENEW, enc_renew, dec_renew),
7512 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7513 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7514 PROC(LOCK, enc_lock, dec_lock),
7515 PROC(LOCKT, enc_lockt, dec_lockt),
7516 PROC(LOCKU, enc_locku, dec_locku),
7517 PROC(ACCESS, enc_access, dec_access),
7518 PROC(GETATTR, enc_getattr, dec_getattr),
7519 PROC(LOOKUP, enc_lookup, dec_lookup),
7520 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7521 PROC(REMOVE, enc_remove, dec_remove),
7522 PROC(RENAME, enc_rename, dec_rename),
7523 PROC(LINK, enc_link, dec_link),
7524 PROC(SYMLINK, enc_symlink, dec_symlink),
7525 PROC(CREATE, enc_create, dec_create),
7526 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7527 PROC(STATFS, enc_statfs, dec_statfs),
7528 PROC(READLINK, enc_readlink, dec_readlink),
7529 PROC(READDIR, enc_readdir, dec_readdir),
7530 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7531 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7532 PROC(GETACL, enc_getacl, dec_getacl),
7533 PROC(SETACL, enc_setacl, dec_setacl),
7534 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7535 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7536 PROC(SECINFO, enc_secinfo, dec_secinfo),
7537 PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present),
7538 #if defined(CONFIG_NFS_V4_1)
7539 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7540 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
7541 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7542 PROC(SEQUENCE, enc_sequence, dec_sequence),
7543 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7544 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
7545 PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7546 PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
7547 PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7548 PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7549 PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7550 PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7551 PROC(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7552 STUB(GETDEVICELIST),
7553 PROC(BIND_CONN_TO_SESSION,
7554 enc_bind_conn_to_session, dec_bind_conn_to_session),
7555 PROC(DESTROY_CLIENTID, enc_destroy_clientid, dec_destroy_clientid),
7556 #endif /* CONFIG_NFS_V4_1 */
7557 #ifdef CONFIG_NFS_V4_2
7558 PROC(SEEK, enc_seek, dec_seek),
7559 PROC(ALLOCATE, enc_allocate, dec_allocate),
7560 PROC(DEALLOCATE, enc_deallocate, dec_deallocate),
7561 PROC(LAYOUTSTATS, enc_layoutstats, dec_layoutstats),
7562 PROC(CLONE, enc_clone, dec_clone),
7563 PROC(COPY, enc_copy, dec_copy),
7564 #endif /* CONFIG_NFS_V4_2 */
7565 };
7566
7567 const struct rpc_version nfs_version4 = {
7568 .number = 4,
7569 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7570 .procs = nfs4_procedures
7571 };
7572
7573 /*
7574 * Local variables:
7575 * c-basic-offset: 8
7576 * End:
7577 */
Linux with added FPC-III support