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perf bpf: Move perf_event_output() from stdio.h to bpf.h
[linux/fpc-iii.git] / fs / nfs / nfs4xdr.c
blob2fc8f6fa25e4b400553af4506f243ae1ada058e2
1 /*
2 * fs/nfs/nfs4xdr.c
3 *
4 * Client-side XDR for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <linux/param.h>
39 #include <linux/time.h>
40 #include <linux/mm.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/in.h>
44 #include <linux/pagemap.h>
45 #include <linux/proc_fs.h>
46 #include <linux/kdev_t.h>
47 #include <linux/module.h>
48 #include <linux/utsname.h>
49 #include <linux/sunrpc/clnt.h>
50 #include <linux/sunrpc/msg_prot.h>
51 #include <linux/sunrpc/gss_api.h>
52 #include <linux/nfs.h>
53 #include <linux/nfs4.h>
54 #include <linux/nfs_fs.h>
55
56 #include "nfs4_fs.h"
57 #include "internal.h"
58 #include "nfs4idmap.h"
59 #include "nfs4session.h"
60 #include "pnfs.h"
61 #include "netns.h"
62
63 #define NFSDBG_FACILITY NFSDBG_XDR
64
65 /* Mapping from NFS error code to "errno" error code. */
66 #define errno_NFSERR_IO EIO
67
68 struct compound_hdr;
69 static int nfs4_stat_to_errno(int);
70 static void encode_layoutget(struct xdr_stream *xdr,
71 const struct nfs4_layoutget_args *args,
72 struct compound_hdr *hdr);
73 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
74 struct nfs4_layoutget_res *res);
75
76 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
77 #ifdef DEBUG
78 #define NFS4_MAXTAGLEN 20
79 #else
80 #define NFS4_MAXTAGLEN 0
81 #endif
82
83 /* lock,open owner id:
84 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
85 */
86 #define open_owner_id_maxsz (1 + 2 + 1 + 1 + 2)
87 #define lock_owner_id_maxsz (1 + 1 + 4)
88 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
89 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
90 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
91 #define op_encode_hdr_maxsz (1)
92 #define op_decode_hdr_maxsz (2)
93 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
94 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
95 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
96 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
97 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
98 (NFS4_FHSIZE >> 2))
99 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
100 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
101 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
102 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
103 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
104 ((3+NFS4_FHSIZE) >> 2))
105 #define nfs4_fattr_bitmap_maxsz 4
106 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
107 #define nfstime4_maxsz (3)
108 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
109 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
110 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
111 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
112 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
113 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
114 #define nfs4_label_maxsz (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
115 #else
116 #define nfs4_label_maxsz 0
117 #endif
118 /* We support only one layout type per file system */
119 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
120 /* This is based on getfattr, which uses the most attributes: */
121 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
122 3*nfstime4_maxsz + \
123 nfs4_owner_maxsz + \
124 nfs4_group_maxsz + nfs4_label_maxsz + \
125 decode_mdsthreshold_maxsz))
126 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
127 nfs4_fattr_value_maxsz)
128 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
129 #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
130 1 + 2 + 1 + \
131 nfs4_owner_maxsz + \
132 nfs4_group_maxsz + \
133 nfs4_label_maxsz + \
134 1 + nfstime4_maxsz + \
135 1 + nfstime4_maxsz)
136 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
137 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
138 #define encode_restorefh_maxsz (op_encode_hdr_maxsz)
139 #define decode_restorefh_maxsz (op_decode_hdr_maxsz)
140 #define encode_fsinfo_maxsz (encode_getattr_maxsz)
141 /* The 5 accounts for the PNFS attributes, and assumes that at most three
142 * layout types will be returned.
143 */
144 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + \
145 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
146 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
147 #define decode_renew_maxsz (op_decode_hdr_maxsz)
148 #define encode_setclientid_maxsz \
149 (op_encode_hdr_maxsz + \
150 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
151 /* client name */ \
152 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
153 1 /* sc_prog */ + \
154 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
155 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
156 1) /* sc_cb_ident */
157 #define decode_setclientid_maxsz \
158 (op_decode_hdr_maxsz + \
159 2 /* clientid */ + \
160 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
161 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
162 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
163 #define encode_setclientid_confirm_maxsz \
164 (op_encode_hdr_maxsz + \
165 3 + (NFS4_VERIFIER_SIZE >> 2))
166 #define decode_setclientid_confirm_maxsz \
167 (op_decode_hdr_maxsz)
168 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
169 #define decode_lookup_maxsz (op_decode_hdr_maxsz)
170 #define encode_lookupp_maxsz (op_encode_hdr_maxsz)
171 #define decode_lookupp_maxsz (op_decode_hdr_maxsz)
172 #define encode_share_access_maxsz \
173 (2)
174 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
175 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
176 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
177 #define encode_open_maxsz (op_encode_hdr_maxsz + \
178 2 + encode_share_access_maxsz + 2 + \
179 open_owner_id_maxsz + \
180 encode_opentype_maxsz + \
181 encode_claim_null_maxsz)
182 #define decode_space_limit_maxsz (3)
183 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
184 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
185 decode_space_limit_maxsz + \
186 decode_ace_maxsz)
187 #define decode_change_info_maxsz (5)
188 #define decode_open_maxsz (op_decode_hdr_maxsz + \
189 decode_stateid_maxsz + \
190 decode_change_info_maxsz + 1 + \
191 nfs4_fattr_bitmap_maxsz + \
192 decode_delegation_maxsz)
193 #define encode_open_confirm_maxsz \
194 (op_encode_hdr_maxsz + \
195 encode_stateid_maxsz + 1)
196 #define decode_open_confirm_maxsz \
197 (op_decode_hdr_maxsz + \
198 decode_stateid_maxsz)
199 #define encode_open_downgrade_maxsz \
200 (op_encode_hdr_maxsz + \
201 encode_stateid_maxsz + 1 + \
202 encode_share_access_maxsz)
203 #define decode_open_downgrade_maxsz \
204 (op_decode_hdr_maxsz + \
205 decode_stateid_maxsz)
206 #define encode_close_maxsz (op_encode_hdr_maxsz + \
207 1 + encode_stateid_maxsz)
208 #define decode_close_maxsz (op_decode_hdr_maxsz + \
209 decode_stateid_maxsz)
210 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
211 encode_stateid_maxsz + \
212 encode_attrs_maxsz)
213 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
214 nfs4_fattr_bitmap_maxsz)
215 #define encode_read_maxsz (op_encode_hdr_maxsz + \
216 encode_stateid_maxsz + 3)
217 #define decode_read_maxsz (op_decode_hdr_maxsz + 2)
218 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
219 2 + encode_verifier_maxsz + 5 + \
220 nfs4_label_maxsz)
221 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
222 decode_verifier_maxsz)
223 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
224 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
225 #define encode_write_maxsz (op_encode_hdr_maxsz + \
226 encode_stateid_maxsz + 4)
227 #define decode_write_maxsz (op_decode_hdr_maxsz + \
228 2 + decode_verifier_maxsz)
229 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
230 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
231 decode_verifier_maxsz)
232 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
233 nfs4_name_maxsz)
234 #define decode_remove_maxsz (op_decode_hdr_maxsz + \
235 decode_change_info_maxsz)
236 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
237 2 * nfs4_name_maxsz)
238 #define decode_rename_maxsz (op_decode_hdr_maxsz + \
239 decode_change_info_maxsz + \
240 decode_change_info_maxsz)
241 #define encode_link_maxsz (op_encode_hdr_maxsz + \
242 nfs4_name_maxsz)
243 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
244 #define encode_lockowner_maxsz (7)
245 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
246 7 + \
247 1 + encode_stateid_maxsz + 1 + \
248 encode_lockowner_maxsz)
249 #define decode_lock_denied_maxsz \
250 (8 + decode_lockowner_maxsz)
251 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
252 decode_lock_denied_maxsz)
253 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
254 encode_lockowner_maxsz)
255 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
256 decode_lock_denied_maxsz)
257 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
258 encode_stateid_maxsz + \
259 4)
260 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
261 decode_stateid_maxsz)
262 #define encode_release_lockowner_maxsz \
263 (op_encode_hdr_maxsz + \
264 encode_lockowner_maxsz)
265 #define decode_release_lockowner_maxsz \
266 (op_decode_hdr_maxsz)
267 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
268 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
269 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
270 1 + nfs4_name_maxsz + \
271 1 + \
272 nfs4_fattr_maxsz)
273 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
274 #define encode_create_maxsz (op_encode_hdr_maxsz + \
275 1 + 2 + nfs4_name_maxsz + \
276 encode_attrs_maxsz)
277 #define decode_create_maxsz (op_decode_hdr_maxsz + \
278 decode_change_info_maxsz + \
279 nfs4_fattr_bitmap_maxsz)
280 #define encode_statfs_maxsz (encode_getattr_maxsz)
281 #define decode_statfs_maxsz (decode_getattr_maxsz)
282 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
283 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
284 #define encode_getacl_maxsz (encode_getattr_maxsz)
285 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
286 nfs4_fattr_bitmap_maxsz + 1)
287 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
288 encode_stateid_maxsz + 3)
289 #define decode_setacl_maxsz (decode_setattr_maxsz)
290 #define encode_fs_locations_maxsz \
291 (encode_getattr_maxsz)
292 #define decode_fs_locations_maxsz \
293 (0)
294 #define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
295 #define decode_secinfo_maxsz (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
296
297 #if defined(CONFIG_NFS_V4_1)
298 #define NFS4_MAX_MACHINE_NAME_LEN (64)
299 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
300 sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
301
302 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
303 encode_verifier_maxsz + \
304 1 /* co_ownerid.len */ + \
305 /* eia_clientowner */ \
306 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
307 1 /* flags */ + \
308 1 /* spa_how */ + \
309 /* max is SP4_MACH_CRED (for now) */ + \
310 1 + NFS4_OP_MAP_NUM_WORDS + \
311 1 + NFS4_OP_MAP_NUM_WORDS + \
312 1 /* implementation id array of size 1 */ + \
313 1 /* nii_domain */ + \
314 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
315 1 /* nii_name */ + \
316 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
317 3 /* nii_date */)
318 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
319 2 /* eir_clientid */ + \
320 1 /* eir_sequenceid */ + \
321 1 /* eir_flags */ + \
322 1 /* spr_how */ + \
323 /* max is SP4_MACH_CRED (for now) */ + \
324 1 + NFS4_OP_MAP_NUM_WORDS + \
325 1 + NFS4_OP_MAP_NUM_WORDS + \
326 2 /* eir_server_owner.so_minor_id */ + \
327 /* eir_server_owner.so_major_id<> */ \
328 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
329 /* eir_server_scope<> */ \
330 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
331 1 /* eir_server_impl_id array length */ + \
332 1 /* nii_domain */ + \
333 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
334 1 /* nii_name */ + \
335 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
336 3 /* nii_date */)
337 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
338 #define decode_channel_attrs_maxsz (6 + \
339 1 /* ca_rdma_ird.len */ + \
340 1 /* ca_rdma_ird */)
341 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \
342 2 /* csa_clientid */ + \
343 1 /* csa_sequence */ + \
344 1 /* csa_flags */ + \
345 encode_channel_attrs_maxsz + \
346 encode_channel_attrs_maxsz + \
347 1 /* csa_cb_program */ + \
348 1 /* csa_sec_parms.len (1) */ + \
349 1 /* cb_secflavor (AUTH_SYS) */ + \
350 1 /* stamp */ + \
351 1 /* machinename.len */ + \
352 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
353 1 /* uid */ + \
354 1 /* gid */ + \
355 1 /* gids.len (0) */)
356 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \
357 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
358 1 /* csr_sequence */ + \
359 1 /* csr_flags */ + \
360 decode_channel_attrs_maxsz + \
361 decode_channel_attrs_maxsz)
362 #define encode_bind_conn_to_session_maxsz (op_encode_hdr_maxsz + \
363 /* bctsa_sessid */ \
364 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
365 1 /* bctsa_dir */ + \
366 1 /* bctsa_use_conn_in_rdma_mode */)
367 #define decode_bind_conn_to_session_maxsz (op_decode_hdr_maxsz + \
368 /* bctsr_sessid */ \
369 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
370 1 /* bctsr_dir */ + \
371 1 /* bctsr_use_conn_in_rdma_mode */)
372 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
373 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
374 #define encode_destroy_clientid_maxsz (op_encode_hdr_maxsz + 2)
375 #define decode_destroy_clientid_maxsz (op_decode_hdr_maxsz)
376 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \
377 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
378 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \
379 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
380 #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
381 #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
382 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
383 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
384 1 /* layout type */ + \
385 1 /* maxcount */ + \
386 1 /* bitmap size */ + \
387 1 /* notification bitmap length */ + \
388 1 /* notification bitmap, word 0 */)
389 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
390 1 /* layout type */ + \
391 1 /* opaque devaddr4 length */ + \
392 /* devaddr4 payload is read into page */ \
393 1 /* notification bitmap length */ + \
394 1 /* notification bitmap, word 0 */)
395 #define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
396 encode_stateid_maxsz)
397 #define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
398 decode_stateid_maxsz + \
399 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
400 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
401 2 /* offset */ + \
402 2 /* length */ + \
403 1 /* reclaim */ + \
404 encode_stateid_maxsz + \
405 1 /* new offset (true) */ + \
406 2 /* last byte written */ + \
407 1 /* nt_timechanged (false) */ + \
408 1 /* layoutupdate4 layout type */ + \
409 1 /* layoutupdate4 opaqueue len */)
410 /* the actual content of layoutupdate4 should
411 be allocated by drivers and spliced in
412 using xdr_write_pages */
413 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
414 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
415 encode_stateid_maxsz + \
416 1 + \
417 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
418 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
419 1 + decode_stateid_maxsz)
420 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
421 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
422 #define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \
423 XDR_QUADLEN(NFS4_STATEID_SIZE))
424 #define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1)
425 #define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \
426 XDR_QUADLEN(NFS4_STATEID_SIZE))
427 #define decode_free_stateid_maxsz (op_decode_hdr_maxsz)
428 #else /* CONFIG_NFS_V4_1 */
429 #define encode_sequence_maxsz 0
430 #define decode_sequence_maxsz 0
431 #define encode_layoutreturn_maxsz 0
432 #define decode_layoutreturn_maxsz 0
433 #define encode_layoutget_maxsz 0
434 #define decode_layoutget_maxsz 0
435 #endif /* CONFIG_NFS_V4_1 */
436
437 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
438 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
439 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
440 encode_sequence_maxsz + \
441 encode_putfh_maxsz + \
442 encode_read_maxsz)
443 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
444 decode_sequence_maxsz + \
445 decode_putfh_maxsz + \
446 decode_read_maxsz)
447 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
448 encode_sequence_maxsz + \
449 encode_putfh_maxsz + \
450 encode_readlink_maxsz)
451 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
452 decode_sequence_maxsz + \
453 decode_putfh_maxsz + \
454 decode_readlink_maxsz)
455 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
456 encode_sequence_maxsz + \
457 encode_putfh_maxsz + \
458 encode_readdir_maxsz)
459 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
460 decode_sequence_maxsz + \
461 decode_putfh_maxsz + \
462 decode_readdir_maxsz)
463 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
464 encode_sequence_maxsz + \
465 encode_putfh_maxsz + \
466 encode_write_maxsz + \
467 encode_getattr_maxsz)
468 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
469 decode_sequence_maxsz + \
470 decode_putfh_maxsz + \
471 decode_write_maxsz + \
472 decode_getattr_maxsz)
473 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
474 encode_sequence_maxsz + \
475 encode_putfh_maxsz + \
476 encode_commit_maxsz)
477 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
478 decode_sequence_maxsz + \
479 decode_putfh_maxsz + \
480 decode_commit_maxsz)
481 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
482 encode_sequence_maxsz + \
483 encode_putfh_maxsz + \
484 encode_open_maxsz + \
485 encode_access_maxsz + \
486 encode_getfh_maxsz + \
487 encode_getattr_maxsz + \
488 encode_layoutget_maxsz)
489 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
490 decode_sequence_maxsz + \
491 decode_putfh_maxsz + \
492 decode_open_maxsz + \
493 decode_access_maxsz + \
494 decode_getfh_maxsz + \
495 decode_getattr_maxsz + \
496 decode_layoutget_maxsz)
497 #define NFS4_enc_open_confirm_sz \
498 (compound_encode_hdr_maxsz + \
499 encode_putfh_maxsz + \
500 encode_open_confirm_maxsz)
501 #define NFS4_dec_open_confirm_sz \
502 (compound_decode_hdr_maxsz + \
503 decode_putfh_maxsz + \
504 decode_open_confirm_maxsz)
505 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
506 encode_sequence_maxsz + \
507 encode_putfh_maxsz + \
508 encode_open_maxsz + \
509 encode_access_maxsz + \
510 encode_getattr_maxsz + \
511 encode_layoutget_maxsz)
512 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
513 decode_sequence_maxsz + \
514 decode_putfh_maxsz + \
515 decode_open_maxsz + \
516 decode_access_maxsz + \
517 decode_getattr_maxsz + \
518 decode_layoutget_maxsz)
519 #define NFS4_enc_open_downgrade_sz \
520 (compound_encode_hdr_maxsz + \
521 encode_sequence_maxsz + \
522 encode_putfh_maxsz + \
523 encode_layoutreturn_maxsz + \
524 encode_open_downgrade_maxsz)
525 #define NFS4_dec_open_downgrade_sz \
526 (compound_decode_hdr_maxsz + \
527 decode_sequence_maxsz + \
528 decode_putfh_maxsz + \
529 decode_layoutreturn_maxsz + \
530 decode_open_downgrade_maxsz)
531 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
532 encode_sequence_maxsz + \
533 encode_putfh_maxsz + \
534 encode_layoutreturn_maxsz + \
535 encode_close_maxsz + \
536 encode_getattr_maxsz)
537 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
538 decode_sequence_maxsz + \
539 decode_putfh_maxsz + \
540 decode_layoutreturn_maxsz + \
541 decode_close_maxsz + \
542 decode_getattr_maxsz)
543 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
544 encode_sequence_maxsz + \
545 encode_putfh_maxsz + \
546 encode_setattr_maxsz + \
547 encode_getattr_maxsz)
548 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
549 decode_sequence_maxsz + \
550 decode_putfh_maxsz + \
551 decode_setattr_maxsz + \
552 decode_getattr_maxsz)
553 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
554 encode_sequence_maxsz + \
555 encode_putfh_maxsz + \
556 encode_fsinfo_maxsz)
557 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
558 decode_sequence_maxsz + \
559 decode_putfh_maxsz + \
560 decode_fsinfo_maxsz)
561 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
562 encode_renew_maxsz)
563 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
564 decode_renew_maxsz)
565 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
566 encode_setclientid_maxsz)
567 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
568 decode_setclientid_maxsz)
569 #define NFS4_enc_setclientid_confirm_sz \
570 (compound_encode_hdr_maxsz + \
571 encode_setclientid_confirm_maxsz)
572 #define NFS4_dec_setclientid_confirm_sz \
573 (compound_decode_hdr_maxsz + \
574 decode_setclientid_confirm_maxsz)
575 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
576 encode_sequence_maxsz + \
577 encode_putfh_maxsz + \
578 encode_lock_maxsz)
579 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
580 decode_sequence_maxsz + \
581 decode_putfh_maxsz + \
582 decode_lock_maxsz)
583 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
584 encode_sequence_maxsz + \
585 encode_putfh_maxsz + \
586 encode_lockt_maxsz)
587 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
588 decode_sequence_maxsz + \
589 decode_putfh_maxsz + \
590 decode_lockt_maxsz)
591 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
592 encode_sequence_maxsz + \
593 encode_putfh_maxsz + \
594 encode_locku_maxsz)
595 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
596 decode_sequence_maxsz + \
597 decode_putfh_maxsz + \
598 decode_locku_maxsz)
599 #define NFS4_enc_release_lockowner_sz \
600 (compound_encode_hdr_maxsz + \
601 encode_lockowner_maxsz)
602 #define NFS4_dec_release_lockowner_sz \
603 (compound_decode_hdr_maxsz + \
604 decode_lockowner_maxsz)
605 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
606 encode_sequence_maxsz + \
607 encode_putfh_maxsz + \
608 encode_access_maxsz + \
609 encode_getattr_maxsz)
610 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
611 decode_sequence_maxsz + \
612 decode_putfh_maxsz + \
613 decode_access_maxsz + \
614 decode_getattr_maxsz)
615 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
616 encode_sequence_maxsz + \
617 encode_putfh_maxsz + \
618 encode_getattr_maxsz + \
619 encode_renew_maxsz)
620 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
621 decode_sequence_maxsz + \
622 decode_putfh_maxsz + \
623 decode_getattr_maxsz + \
624 decode_renew_maxsz)
625 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
626 encode_sequence_maxsz + \
627 encode_putfh_maxsz + \
628 encode_lookup_maxsz + \
629 encode_getattr_maxsz + \
630 encode_getfh_maxsz)
631 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
632 decode_sequence_maxsz + \
633 decode_putfh_maxsz + \
634 decode_lookup_maxsz + \
635 decode_getattr_maxsz + \
636 decode_getfh_maxsz)
637 #define NFS4_enc_lookupp_sz (compound_encode_hdr_maxsz + \
638 encode_sequence_maxsz + \
639 encode_putfh_maxsz + \
640 encode_lookupp_maxsz + \
641 encode_getattr_maxsz + \
642 encode_getfh_maxsz)
643 #define NFS4_dec_lookupp_sz (compound_decode_hdr_maxsz + \
644 decode_sequence_maxsz + \
645 decode_putfh_maxsz + \
646 decode_lookupp_maxsz + \
647 decode_getattr_maxsz + \
648 decode_getfh_maxsz)
649 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
650 encode_sequence_maxsz + \
651 encode_putrootfh_maxsz + \
652 encode_getattr_maxsz + \
653 encode_getfh_maxsz)
654 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
655 decode_sequence_maxsz + \
656 decode_putrootfh_maxsz + \
657 decode_getattr_maxsz + \
658 decode_getfh_maxsz)
659 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
660 encode_sequence_maxsz + \
661 encode_putfh_maxsz + \
662 encode_remove_maxsz)
663 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
664 decode_sequence_maxsz + \
665 decode_putfh_maxsz + \
666 decode_remove_maxsz)
667 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
668 encode_sequence_maxsz + \
669 encode_putfh_maxsz + \
670 encode_savefh_maxsz + \
671 encode_putfh_maxsz + \
672 encode_rename_maxsz)
673 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
674 decode_sequence_maxsz + \
675 decode_putfh_maxsz + \
676 decode_savefh_maxsz + \
677 decode_putfh_maxsz + \
678 decode_rename_maxsz)
679 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
680 encode_sequence_maxsz + \
681 encode_putfh_maxsz + \
682 encode_savefh_maxsz + \
683 encode_putfh_maxsz + \
684 encode_link_maxsz + \
685 encode_restorefh_maxsz + \
686 encode_getattr_maxsz)
687 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
688 decode_sequence_maxsz + \
689 decode_putfh_maxsz + \
690 decode_savefh_maxsz + \
691 decode_putfh_maxsz + \
692 decode_link_maxsz + \
693 decode_restorefh_maxsz + \
694 decode_getattr_maxsz)
695 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
696 encode_sequence_maxsz + \
697 encode_putfh_maxsz + \
698 encode_symlink_maxsz + \
699 encode_getattr_maxsz + \
700 encode_getfh_maxsz)
701 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
702 decode_sequence_maxsz + \
703 decode_putfh_maxsz + \
704 decode_symlink_maxsz + \
705 decode_getattr_maxsz + \
706 decode_getfh_maxsz)
707 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
708 encode_sequence_maxsz + \
709 encode_putfh_maxsz + \
710 encode_create_maxsz + \
711 encode_getfh_maxsz + \
712 encode_getattr_maxsz)
713 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
714 decode_sequence_maxsz + \
715 decode_putfh_maxsz + \
716 decode_create_maxsz + \
717 decode_getfh_maxsz + \
718 decode_getattr_maxsz)
719 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
720 encode_sequence_maxsz + \
721 encode_putfh_maxsz + \
722 encode_getattr_maxsz)
723 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
724 decode_sequence_maxsz + \
725 decode_putfh_maxsz + \
726 decode_getattr_maxsz)
727 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
728 encode_sequence_maxsz + \
729 encode_putfh_maxsz + \
730 encode_statfs_maxsz)
731 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
732 decode_sequence_maxsz + \
733 decode_putfh_maxsz + \
734 decode_statfs_maxsz)
735 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
736 encode_sequence_maxsz + \
737 encode_putfh_maxsz + \
738 encode_getattr_maxsz)
739 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
740 decode_sequence_maxsz + \
741 decode_putfh_maxsz + \
742 decode_getattr_maxsz)
743 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
744 encode_sequence_maxsz + \
745 encode_putfh_maxsz + \
746 encode_layoutreturn_maxsz + \
747 encode_delegreturn_maxsz + \
748 encode_getattr_maxsz)
749 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
750 decode_sequence_maxsz + \
751 decode_putfh_maxsz + \
752 decode_layoutreturn_maxsz + \
753 decode_delegreturn_maxsz + \
754 decode_getattr_maxsz)
755 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
756 encode_sequence_maxsz + \
757 encode_putfh_maxsz + \
758 encode_getacl_maxsz)
759 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
760 decode_sequence_maxsz + \
761 decode_putfh_maxsz + \
762 decode_getacl_maxsz)
763 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
764 encode_sequence_maxsz + \
765 encode_putfh_maxsz + \
766 encode_setacl_maxsz)
767 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
768 decode_sequence_maxsz + \
769 decode_putfh_maxsz + \
770 decode_setacl_maxsz)
771 #define NFS4_enc_fs_locations_sz \
772 (compound_encode_hdr_maxsz + \
773 encode_sequence_maxsz + \
774 encode_putfh_maxsz + \
775 encode_lookup_maxsz + \
776 encode_fs_locations_maxsz + \
777 encode_renew_maxsz)
778 #define NFS4_dec_fs_locations_sz \
779 (compound_decode_hdr_maxsz + \
780 decode_sequence_maxsz + \
781 decode_putfh_maxsz + \
782 decode_lookup_maxsz + \
783 decode_fs_locations_maxsz + \
784 decode_renew_maxsz)
785 #define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
786 encode_sequence_maxsz + \
787 encode_putfh_maxsz + \
788 encode_secinfo_maxsz)
789 #define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
790 decode_sequence_maxsz + \
791 decode_putfh_maxsz + \
792 decode_secinfo_maxsz)
793 #define NFS4_enc_fsid_present_sz \
794 (compound_encode_hdr_maxsz + \
795 encode_sequence_maxsz + \
796 encode_putfh_maxsz + \
797 encode_getfh_maxsz + \
798 encode_renew_maxsz)
799 #define NFS4_dec_fsid_present_sz \
800 (compound_decode_hdr_maxsz + \
801 decode_sequence_maxsz + \
802 decode_putfh_maxsz + \
803 decode_getfh_maxsz + \
804 decode_renew_maxsz)
805 #if defined(CONFIG_NFS_V4_1)
806 #define NFS4_enc_bind_conn_to_session_sz \
807 (compound_encode_hdr_maxsz + \
808 encode_bind_conn_to_session_maxsz)
809 #define NFS4_dec_bind_conn_to_session_sz \
810 (compound_decode_hdr_maxsz + \
811 decode_bind_conn_to_session_maxsz)
812 #define NFS4_enc_exchange_id_sz \
813 (compound_encode_hdr_maxsz + \
814 encode_exchange_id_maxsz)
815 #define NFS4_dec_exchange_id_sz \
816 (compound_decode_hdr_maxsz + \
817 decode_exchange_id_maxsz)
818 #define NFS4_enc_create_session_sz \
819 (compound_encode_hdr_maxsz + \
820 encode_create_session_maxsz)
821 #define NFS4_dec_create_session_sz \
822 (compound_decode_hdr_maxsz + \
823 decode_create_session_maxsz)
824 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
825 encode_destroy_session_maxsz)
826 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
827 decode_destroy_session_maxsz)
828 #define NFS4_enc_destroy_clientid_sz (compound_encode_hdr_maxsz + \
829 encode_destroy_clientid_maxsz)
830 #define NFS4_dec_destroy_clientid_sz (compound_decode_hdr_maxsz + \
831 decode_destroy_clientid_maxsz)
832 #define NFS4_enc_sequence_sz \
833 (compound_decode_hdr_maxsz + \
834 encode_sequence_maxsz)
835 #define NFS4_dec_sequence_sz \
836 (compound_decode_hdr_maxsz + \
837 decode_sequence_maxsz)
838 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
839 encode_sequence_maxsz + \
840 encode_putrootfh_maxsz + \
841 encode_fsinfo_maxsz)
842 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
843 decode_sequence_maxsz + \
844 decode_putrootfh_maxsz + \
845 decode_fsinfo_maxsz)
846 #define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
847 encode_sequence_maxsz + \
848 encode_reclaim_complete_maxsz)
849 #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
850 decode_sequence_maxsz + \
851 decode_reclaim_complete_maxsz)
852 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
853 encode_sequence_maxsz +\
854 encode_getdeviceinfo_maxsz)
855 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
856 decode_sequence_maxsz + \
857 decode_getdeviceinfo_maxsz)
858 #define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
859 encode_sequence_maxsz + \
860 encode_putfh_maxsz + \
861 encode_layoutget_maxsz)
862 #define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
863 decode_sequence_maxsz + \
864 decode_putfh_maxsz + \
865 decode_layoutget_maxsz)
866 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
867 encode_sequence_maxsz +\
868 encode_putfh_maxsz + \
869 encode_layoutcommit_maxsz + \
870 encode_getattr_maxsz)
871 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
872 decode_sequence_maxsz + \
873 decode_putfh_maxsz + \
874 decode_layoutcommit_maxsz + \
875 decode_getattr_maxsz)
876 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
877 encode_sequence_maxsz + \
878 encode_putfh_maxsz + \
879 encode_layoutreturn_maxsz)
880 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
881 decode_sequence_maxsz + \
882 decode_putfh_maxsz + \
883 decode_layoutreturn_maxsz)
884 #define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
885 encode_sequence_maxsz + \
886 encode_putrootfh_maxsz +\
887 encode_secinfo_no_name_maxsz)
888 #define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
889 decode_sequence_maxsz + \
890 decode_putrootfh_maxsz + \
891 decode_secinfo_no_name_maxsz)
892 #define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
893 encode_sequence_maxsz + \
894 encode_test_stateid_maxsz)
895 #define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
896 decode_sequence_maxsz + \
897 decode_test_stateid_maxsz)
898 #define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \
899 encode_sequence_maxsz + \
900 encode_free_stateid_maxsz)
901 #define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
902 decode_sequence_maxsz + \
903 decode_free_stateid_maxsz)
904
905 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
906 compound_encode_hdr_maxsz +
907 encode_sequence_maxsz +
908 encode_putfh_maxsz +
909 encode_getattr_maxsz) *
910 XDR_UNIT);
911
912 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
913 compound_decode_hdr_maxsz +
914 decode_sequence_maxsz +
915 decode_putfh_maxsz) *
916 XDR_UNIT);
917
918 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
919 compound_decode_hdr_maxsz +
920 decode_sequence_maxsz) *
921 XDR_UNIT);
922 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
923 #endif /* CONFIG_NFS_V4_1 */
924
925 static const umode_t nfs_type2fmt[] = {
926 [NF4BAD] = 0,
927 [NF4REG] = S_IFREG,
928 [NF4DIR] = S_IFDIR,
929 [NF4BLK] = S_IFBLK,
930 [NF4CHR] = S_IFCHR,
931 [NF4LNK] = S_IFLNK,
932 [NF4SOCK] = S_IFSOCK,
933 [NF4FIFO] = S_IFIFO,
934 [NF4ATTRDIR] = 0,
935 [NF4NAMEDATTR] = 0,
936 };
937
938 struct compound_hdr {
939 int32_t status;
940 uint32_t nops;
941 __be32 * nops_p;
942 uint32_t taglen;
943 char * tag;
944 uint32_t replen; /* expected reply words */
945 u32 minorversion;
946 };
947
948 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
949 {
950 __be32 *p = xdr_reserve_space(xdr, nbytes);
951 BUG_ON(!p);
952 return p;
953 }
954
955 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
956 {
957 WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
958 }
959
960 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
961 {
962 WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0);
963 }
964
965 static void encode_uint32(struct xdr_stream *xdr, u32 n)
966 {
967 WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
968 }
969
970 static void encode_uint64(struct xdr_stream *xdr, u64 n)
971 {
972 WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0);
973 }
974
975 static ssize_t xdr_encode_bitmap4(struct xdr_stream *xdr,
976 const __u32 *bitmap, size_t len)
977 {
978 ssize_t ret;
979
980 /* Trim empty words */
981 while (len > 0 && bitmap[len-1] == 0)
982 len--;
983 ret = xdr_stream_encode_uint32_array(xdr, bitmap, len);
984 if (WARN_ON_ONCE(ret < 0))
985 return ret;
986 return len;
987 }
988
989 static size_t mask_bitmap4(const __u32 *bitmap, const __u32 *mask,
990 __u32 *res, size_t len)
991 {
992 size_t i;
993 __u32 tmp;
994
995 while (len > 0 && (bitmap[len-1] == 0 || mask[len-1] == 0))
996 len--;
997 for (i = len; i-- > 0;) {
998 tmp = bitmap[i] & mask[i];
999 res[i] = tmp;
1000 }
1001 return len;
1002 }
1003
1004 static void encode_nfs4_seqid(struct xdr_stream *xdr,
1005 const struct nfs_seqid *seqid)
1006 {
1007 if (seqid != NULL)
1008 encode_uint32(xdr, seqid->sequence->counter);
1009 else
1010 encode_uint32(xdr, 0);
1011 }
1012
1013 static void encode_compound_hdr(struct xdr_stream *xdr,
1014 struct rpc_rqst *req,
1015 struct compound_hdr *hdr)
1016 {
1017 __be32 *p;
1018 struct rpc_auth *auth = req->rq_cred->cr_auth;
1019
1020 /* initialize running count of expected bytes in reply.
1021 * NOTE: the replied tag SHOULD be the same is the one sent,
1022 * but this is not required as a MUST for the server to do so. */
1023 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
1024
1025 WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
1026 encode_string(xdr, hdr->taglen, hdr->tag);
1027 p = reserve_space(xdr, 8);
1028 *p++ = cpu_to_be32(hdr->minorversion);
1029 hdr->nops_p = p;
1030 *p = cpu_to_be32(hdr->nops);
1031 }
1032
1033 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
1034 uint32_t replen,
1035 struct compound_hdr *hdr)
1036 {
1037 encode_uint32(xdr, op);
1038 hdr->nops++;
1039 hdr->replen += replen;
1040 }
1041
1042 static void encode_nops(struct compound_hdr *hdr)
1043 {
1044 WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
1045 *hdr->nops_p = htonl(hdr->nops);
1046 }
1047
1048 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1049 {
1050 encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1051 }
1052
1053 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1054 {
1055 encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1056 }
1057
1058 static __be32 *
1059 xdr_encode_nfstime4(__be32 *p, const struct timespec *t)
1060 {
1061 p = xdr_encode_hyper(p, (__s64)t->tv_sec);
1062 *p++ = cpu_to_be32(t->tv_nsec);
1063 return p;
1064 }
1065
1066 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1067 const struct nfs4_label *label,
1068 const umode_t *umask,
1069 const struct nfs_server *server,
1070 const uint32_t attrmask[])
1071 {
1072 struct timespec ts;
1073 char owner_name[IDMAP_NAMESZ];
1074 char owner_group[IDMAP_NAMESZ];
1075 int owner_namelen = 0;
1076 int owner_grouplen = 0;
1077 __be32 *p;
1078 uint32_t len = 0;
1079 uint32_t bmval[3] = { 0 };
1080
1081 /*
1082 * We reserve enough space to write the entire attribute buffer at once.
1083 */
1084 if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1085 bmval[0] |= FATTR4_WORD0_SIZE;
1086 len += 8;
1087 }
1088 if (iap->ia_valid & ATTR_MODE) {
1089 if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1090 bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1091 len += 8;
1092 } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1093 bmval[1] |= FATTR4_WORD1_MODE;
1094 len += 4;
1095 }
1096 }
1097 if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1098 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1099 if (owner_namelen < 0) {
1100 dprintk("nfs: couldn't resolve uid %d to string\n",
1101 from_kuid(&init_user_ns, iap->ia_uid));
1102 /* XXX */
1103 strcpy(owner_name, "nobody");
1104 owner_namelen = sizeof("nobody") - 1;
1105 /* goto out; */
1106 }
1107 bmval[1] |= FATTR4_WORD1_OWNER;
1108 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1109 }
1110 if ((iap->ia_valid & ATTR_GID) &&
1111 (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1112 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1113 if (owner_grouplen < 0) {
1114 dprintk("nfs: couldn't resolve gid %d to string\n",
1115 from_kgid(&init_user_ns, iap->ia_gid));
1116 strcpy(owner_group, "nobody");
1117 owner_grouplen = sizeof("nobody") - 1;
1118 /* goto out; */
1119 }
1120 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1121 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1122 }
1123 if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1124 if (iap->ia_valid & ATTR_ATIME_SET) {
1125 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1126 len += 4 + (nfstime4_maxsz << 2);
1127 } else if (iap->ia_valid & ATTR_ATIME) {
1128 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1129 len += 4;
1130 }
1131 }
1132 if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1133 if (iap->ia_valid & ATTR_MTIME_SET) {
1134 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1135 len += 4 + (nfstime4_maxsz << 2);
1136 } else if (iap->ia_valid & ATTR_MTIME) {
1137 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1138 len += 4;
1139 }
1140 }
1141
1142 if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1143 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1144 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1145 }
1146
1147 xdr_encode_bitmap4(xdr, bmval, ARRAY_SIZE(bmval));
1148 xdr_stream_encode_opaque_inline(xdr, (void **)&p, len);
1149
1150 if (bmval[0] & FATTR4_WORD0_SIZE)
1151 p = xdr_encode_hyper(p, iap->ia_size);
1152 if (bmval[1] & FATTR4_WORD1_MODE)
1153 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1154 if (bmval[1] & FATTR4_WORD1_OWNER)
1155 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1156 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1157 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1158 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1159 if (iap->ia_valid & ATTR_ATIME_SET) {
1160 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1161 ts = timespec64_to_timespec(iap->ia_atime);
1162 p = xdr_encode_nfstime4(p, &ts);
1163 } else
1164 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1165 }
1166 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1167 if (iap->ia_valid & ATTR_MTIME_SET) {
1168 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1169 ts = timespec64_to_timespec(iap->ia_mtime);
1170 p = xdr_encode_nfstime4(p, &ts);
1171 } else
1172 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1173 }
1174 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1175 *p++ = cpu_to_be32(label->lfs);
1176 *p++ = cpu_to_be32(label->pi);
1177 *p++ = cpu_to_be32(label->len);
1178 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1179 }
1180 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1181 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1182 *p++ = cpu_to_be32(*umask);
1183 }
1184
1185 /* out: */
1186 }
1187
1188 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1189 {
1190 encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1191 encode_uint32(xdr, access);
1192 }
1193
1194 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1195 {
1196 encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1197 encode_nfs4_seqid(xdr, arg->seqid);
1198 encode_nfs4_stateid(xdr, &arg->stateid);
1199 }
1200
1201 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1202 {
1203 __be32 *p;
1204
1205 encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1206 p = reserve_space(xdr, 12);
1207 p = xdr_encode_hyper(p, args->offset);
1208 *p = cpu_to_be32(args->count);
1209 }
1210
1211 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1212 {
1213 __be32 *p;
1214
1215 encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1216 encode_uint32(xdr, create->ftype);
1217
1218 switch (create->ftype) {
1219 case NF4LNK:
1220 p = reserve_space(xdr, 4);
1221 *p = cpu_to_be32(create->u.symlink.len);
1222 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1223 create->u.symlink.len);
1224 xdr->buf->flags |= XDRBUF_WRITE;
1225 break;
1226
1227 case NF4BLK: case NF4CHR:
1228 p = reserve_space(xdr, 8);
1229 *p++ = cpu_to_be32(create->u.device.specdata1);
1230 *p = cpu_to_be32(create->u.device.specdata2);
1231 break;
1232
1233 default:
1234 break;
1235 }
1236
1237 encode_string(xdr, create->name->len, create->name->name);
1238 encode_attrs(xdr, create->attrs, create->label, &create->umask,
1239 create->server, create->server->attr_bitmask);
1240 }
1241
1242 static void encode_getattr(struct xdr_stream *xdr,
1243 const __u32 *bitmap, const __u32 *mask, size_t len,
1244 struct compound_hdr *hdr)
1245 {
1246 __u32 masked_bitmap[nfs4_fattr_bitmap_maxsz];
1247
1248 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1249 if (mask) {
1250 if (WARN_ON_ONCE(len > ARRAY_SIZE(masked_bitmap)))
1251 len = ARRAY_SIZE(masked_bitmap);
1252 len = mask_bitmap4(bitmap, mask, masked_bitmap, len);
1253 bitmap = masked_bitmap;
1254 }
1255 xdr_encode_bitmap4(xdr, bitmap, len);
1256 }
1257
1258 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1259 {
1260 encode_getattr(xdr, nfs4_fattr_bitmap, bitmask,
1261 ARRAY_SIZE(nfs4_fattr_bitmap), hdr);
1262 }
1263
1264 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1265 const u32 *open_bitmap,
1266 struct compound_hdr *hdr)
1267 {
1268 encode_getattr(xdr, open_bitmap, bitmask, 3, hdr);
1269 }
1270
1271 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1272 {
1273 encode_getattr(xdr, nfs4_fsinfo_bitmap, bitmask,
1274 ARRAY_SIZE(nfs4_fsinfo_bitmap), hdr);
1275 }
1276
1277 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1278 {
1279 encode_getattr(xdr, nfs4_fs_locations_bitmap, bitmask,
1280 ARRAY_SIZE(nfs4_fs_locations_bitmap), hdr);
1281 }
1282
1283 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1284 {
1285 encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1286 }
1287
1288 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1289 {
1290 encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1291 encode_string(xdr, name->len, name->name);
1292 }
1293
1294 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1295 {
1296 if (fl->fl_type == F_RDLCK)
1297 return block ? NFS4_READW_LT : NFS4_READ_LT;
1298 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1299 }
1300
1301 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1302 {
1303 if (fl->fl_end == OFFSET_MAX)
1304 return ~(uint64_t)0;
1305 return fl->fl_end - fl->fl_start + 1;
1306 }
1307
1308 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1309 {
1310 __be32 *p;
1311
1312 p = reserve_space(xdr, 32);
1313 p = xdr_encode_hyper(p, lowner->clientid);
1314 *p++ = cpu_to_be32(20);
1315 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1316 *p++ = cpu_to_be32(lowner->s_dev);
1317 xdr_encode_hyper(p, lowner->id);
1318 }
1319
1320 /*
1321 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1322 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1323 */
1324 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1325 {
1326 __be32 *p;
1327
1328 encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1329 p = reserve_space(xdr, 28);
1330 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1331 *p++ = cpu_to_be32(args->reclaim);
1332 p = xdr_encode_hyper(p, args->fl->fl_start);
1333 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1334 *p = cpu_to_be32(args->new_lock_owner);
1335 if (args->new_lock_owner){
1336 encode_nfs4_seqid(xdr, args->open_seqid);
1337 encode_nfs4_stateid(xdr, &args->open_stateid);
1338 encode_nfs4_seqid(xdr, args->lock_seqid);
1339 encode_lockowner(xdr, &args->lock_owner);
1340 }
1341 else {
1342 encode_nfs4_stateid(xdr, &args->lock_stateid);
1343 encode_nfs4_seqid(xdr, args->lock_seqid);
1344 }
1345 }
1346
1347 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1348 {
1349 __be32 *p;
1350
1351 encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1352 p = reserve_space(xdr, 20);
1353 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1354 p = xdr_encode_hyper(p, args->fl->fl_start);
1355 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1356 encode_lockowner(xdr, &args->lock_owner);
1357 }
1358
1359 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1360 {
1361 __be32 *p;
1362
1363 encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1364 encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1365 encode_nfs4_seqid(xdr, args->seqid);
1366 encode_nfs4_stateid(xdr, &args->stateid);
1367 p = reserve_space(xdr, 16);
1368 p = xdr_encode_hyper(p, args->fl->fl_start);
1369 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1370 }
1371
1372 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1373 {
1374 encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1375 encode_lockowner(xdr, lowner);
1376 }
1377
1378 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1379 {
1380 encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1381 encode_string(xdr, name->len, name->name);
1382 }
1383
1384 static void encode_lookupp(struct xdr_stream *xdr, struct compound_hdr *hdr)
1385 {
1386 encode_op_hdr(xdr, OP_LOOKUPP, decode_lookupp_maxsz, hdr);
1387 }
1388
1389 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1390 {
1391 __be32 *p;
1392
1393 p = reserve_space(xdr, 8);
1394 *p++ = cpu_to_be32(share_access);
1395 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1396 }
1397
1398 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1399 {
1400 __be32 *p;
1401 /*
1402 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1403 * owner 4 = 32
1404 */
1405 encode_nfs4_seqid(xdr, arg->seqid);
1406 encode_share_access(xdr, arg->share_access);
1407 p = reserve_space(xdr, 36);
1408 p = xdr_encode_hyper(p, arg->clientid);
1409 *p++ = cpu_to_be32(24);
1410 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1411 *p++ = cpu_to_be32(arg->server->s_dev);
1412 *p++ = cpu_to_be32(arg->id.uniquifier);
1413 xdr_encode_hyper(p, arg->id.create_time);
1414 }
1415
1416 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1417 {
1418 __be32 *p;
1419
1420 p = reserve_space(xdr, 4);
1421 switch(arg->createmode) {
1422 case NFS4_CREATE_UNCHECKED:
1423 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1424 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1425 arg->server, arg->server->attr_bitmask);
1426 break;
1427 case NFS4_CREATE_GUARDED:
1428 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1429 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1430 arg->server, arg->server->attr_bitmask);
1431 break;
1432 case NFS4_CREATE_EXCLUSIVE:
1433 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1434 encode_nfs4_verifier(xdr, &arg->u.verifier);
1435 break;
1436 case NFS4_CREATE_EXCLUSIVE4_1:
1437 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1438 encode_nfs4_verifier(xdr, &arg->u.verifier);
1439 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1440 arg->server, arg->server->exclcreat_bitmask);
1441 }
1442 }
1443
1444 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1445 {
1446 __be32 *p;
1447
1448 p = reserve_space(xdr, 4);
1449 switch (arg->open_flags & O_CREAT) {
1450 case 0:
1451 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1452 break;
1453 default:
1454 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1455 encode_createmode(xdr, arg);
1456 }
1457 }
1458
1459 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1460 {
1461 __be32 *p;
1462
1463 p = reserve_space(xdr, 4);
1464 switch (delegation_type) {
1465 case 0:
1466 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1467 break;
1468 case FMODE_READ:
1469 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1470 break;
1471 case FMODE_WRITE|FMODE_READ:
1472 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1473 break;
1474 default:
1475 BUG();
1476 }
1477 }
1478
1479 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1480 {
1481 __be32 *p;
1482
1483 p = reserve_space(xdr, 4);
1484 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1485 encode_string(xdr, name->len, name->name);
1486 }
1487
1488 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1489 {
1490 __be32 *p;
1491
1492 p = reserve_space(xdr, 4);
1493 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1494 encode_delegation_type(xdr, type);
1495 }
1496
1497 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1498 {
1499 __be32 *p;
1500
1501 p = reserve_space(xdr, 4);
1502 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1503 encode_nfs4_stateid(xdr, stateid);
1504 encode_string(xdr, name->len, name->name);
1505 }
1506
1507 static inline void encode_claim_fh(struct xdr_stream *xdr)
1508 {
1509 __be32 *p;
1510
1511 p = reserve_space(xdr, 4);
1512 *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1513 }
1514
1515 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1516 {
1517 __be32 *p;
1518
1519 p = reserve_space(xdr, 4);
1520 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1521 encode_nfs4_stateid(xdr, stateid);
1522 }
1523
1524 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1525 {
1526 encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1527 encode_openhdr(xdr, arg);
1528 encode_opentype(xdr, arg);
1529 switch (arg->claim) {
1530 case NFS4_OPEN_CLAIM_NULL:
1531 encode_claim_null(xdr, arg->name);
1532 break;
1533 case NFS4_OPEN_CLAIM_PREVIOUS:
1534 encode_claim_previous(xdr, arg->u.delegation_type);
1535 break;
1536 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1537 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1538 break;
1539 case NFS4_OPEN_CLAIM_FH:
1540 encode_claim_fh(xdr);
1541 break;
1542 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1543 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1544 break;
1545 default:
1546 BUG();
1547 }
1548 }
1549
1550 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1551 {
1552 encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1553 encode_nfs4_stateid(xdr, arg->stateid);
1554 encode_nfs4_seqid(xdr, arg->seqid);
1555 }
1556
1557 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1558 {
1559 encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1560 encode_nfs4_stateid(xdr, &arg->stateid);
1561 encode_nfs4_seqid(xdr, arg->seqid);
1562 encode_share_access(xdr, arg->share_access);
1563 }
1564
1565 static void
1566 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1567 {
1568 encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1569 encode_string(xdr, fh->size, fh->data);
1570 }
1571
1572 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1573 {
1574 encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1575 }
1576
1577 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1578 struct compound_hdr *hdr)
1579 {
1580 __be32 *p;
1581
1582 encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1583 encode_nfs4_stateid(xdr, &args->stateid);
1584
1585 p = reserve_space(xdr, 12);
1586 p = xdr_encode_hyper(p, args->offset);
1587 *p = cpu_to_be32(args->count);
1588 }
1589
1590 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1591 {
1592 uint32_t attrs[3] = {
1593 FATTR4_WORD0_RDATTR_ERROR,
1594 FATTR4_WORD1_MOUNTED_ON_FILEID,
1595 };
1596 uint32_t dircount = readdir->count >> 1;
1597 __be32 *p, verf[2];
1598 uint32_t attrlen = 0;
1599 unsigned int i;
1600
1601 if (readdir->plus) {
1602 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1603 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1604 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1605 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1606 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1607 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1608 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1609 dircount >>= 1;
1610 }
1611 /* Use mounted_on_fileid only if the server supports it */
1612 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1613 attrs[0] |= FATTR4_WORD0_FILEID;
1614 for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1615 attrs[i] &= readdir->bitmask[i];
1616 if (attrs[i] != 0)
1617 attrlen = i+1;
1618 }
1619
1620 encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1621 encode_uint64(xdr, readdir->cookie);
1622 encode_nfs4_verifier(xdr, &readdir->verifier);
1623 p = reserve_space(xdr, 12 + (attrlen << 2));
1624 *p++ = cpu_to_be32(dircount);
1625 *p++ = cpu_to_be32(readdir->count);
1626 *p++ = cpu_to_be32(attrlen);
1627 for (i = 0; i < attrlen; i++)
1628 *p++ = cpu_to_be32(attrs[i]);
1629 memcpy(verf, readdir->verifier.data, sizeof(verf));
1630
1631 dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1632 __func__,
1633 (unsigned long long)readdir->cookie,
1634 verf[0], verf[1],
1635 attrs[0] & readdir->bitmask[0],
1636 attrs[1] & readdir->bitmask[1],
1637 attrs[2] & readdir->bitmask[2]);
1638 }
1639
1640 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1641 {
1642 encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1643 }
1644
1645 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1646 {
1647 encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1648 encode_string(xdr, name->len, name->name);
1649 }
1650
1651 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1652 {
1653 encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1654 encode_string(xdr, oldname->len, oldname->name);
1655 encode_string(xdr, newname->len, newname->name);
1656 }
1657
1658 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1659 struct compound_hdr *hdr)
1660 {
1661 encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1662 encode_uint64(xdr, clid);
1663 }
1664
1665 static void
1666 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1667 {
1668 encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1669 }
1670
1671 static void
1672 encode_setacl(struct xdr_stream *xdr, const struct nfs_setaclargs *arg,
1673 struct compound_hdr *hdr)
1674 {
1675 __be32 *p;
1676
1677 encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1678 encode_nfs4_stateid(xdr, &zero_stateid);
1679 p = reserve_space(xdr, 2*4);
1680 *p++ = cpu_to_be32(1);
1681 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1682 p = reserve_space(xdr, 4);
1683 *p = cpu_to_be32(arg->acl_len);
1684 xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1685 }
1686
1687 static void
1688 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1689 {
1690 encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1691 }
1692
1693 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1694 {
1695 encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1696 encode_nfs4_stateid(xdr, &arg->stateid);
1697 encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1698 server->attr_bitmask);
1699 }
1700
1701 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1702 {
1703 __be32 *p;
1704
1705 encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1706 encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1707
1708 encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1709 setclientid->sc_clnt->cl_owner_id);
1710 p = reserve_space(xdr, 4);
1711 *p = cpu_to_be32(setclientid->sc_prog);
1712 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1713 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1714 p = reserve_space(xdr, 4);
1715 *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1716 }
1717
1718 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1719 {
1720 encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1721 decode_setclientid_confirm_maxsz, hdr);
1722 encode_uint64(xdr, arg->clientid);
1723 encode_nfs4_verifier(xdr, &arg->confirm);
1724 }
1725
1726 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1727 struct compound_hdr *hdr)
1728 {
1729 __be32 *p;
1730
1731 encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1732 encode_nfs4_stateid(xdr, &args->stateid);
1733
1734 p = reserve_space(xdr, 16);
1735 p = xdr_encode_hyper(p, args->offset);
1736 *p++ = cpu_to_be32(args->stable);
1737 *p = cpu_to_be32(args->count);
1738
1739 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1740 }
1741
1742 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1743 {
1744 encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1745 encode_nfs4_stateid(xdr, stateid);
1746 }
1747
1748 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1749 {
1750 encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1751 encode_string(xdr, name->len, name->name);
1752 }
1753
1754 #if defined(CONFIG_NFS_V4_1)
1755 /* NFSv4.1 operations */
1756 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1757 const struct nfs41_bind_conn_to_session_args *args,
1758 struct compound_hdr *hdr)
1759 {
1760 __be32 *p;
1761
1762 encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1763 decode_bind_conn_to_session_maxsz, hdr);
1764 encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1765 p = xdr_reserve_space(xdr, 8);
1766 *p++ = cpu_to_be32(args->dir);
1767 *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1768 }
1769
1770 static void encode_op_map(struct xdr_stream *xdr, const struct nfs4_op_map *op_map)
1771 {
1772 unsigned int i;
1773 encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1774 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1775 encode_uint32(xdr, op_map->u.words[i]);
1776 }
1777
1778 static void encode_exchange_id(struct xdr_stream *xdr,
1779 const struct nfs41_exchange_id_args *args,
1780 struct compound_hdr *hdr)
1781 {
1782 __be32 *p;
1783 char impl_name[IMPL_NAME_LIMIT];
1784 int len = 0;
1785
1786 encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1787 encode_nfs4_verifier(xdr, &args->verifier);
1788
1789 encode_string(xdr, strlen(args->client->cl_owner_id),
1790 args->client->cl_owner_id);
1791
1792 encode_uint32(xdr, args->flags);
1793 encode_uint32(xdr, args->state_protect.how);
1794
1795 switch (args->state_protect.how) {
1796 case SP4_NONE:
1797 break;
1798 case SP4_MACH_CRED:
1799 encode_op_map(xdr, &args->state_protect.enforce);
1800 encode_op_map(xdr, &args->state_protect.allow);
1801 break;
1802 default:
1803 WARN_ON_ONCE(1);
1804 break;
1805 }
1806
1807 if (send_implementation_id &&
1808 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1809 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1810 <= sizeof(impl_name) + 1)
1811 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1812 utsname()->sysname, utsname()->release,
1813 utsname()->version, utsname()->machine);
1814
1815 if (len > 0) {
1816 encode_uint32(xdr, 1); /* implementation id array length=1 */
1817
1818 encode_string(xdr,
1819 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1820 CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1821 encode_string(xdr, len, impl_name);
1822 /* just send zeros for nii_date - the date is in nii_name */
1823 p = reserve_space(xdr, 12);
1824 p = xdr_encode_hyper(p, 0);
1825 *p = cpu_to_be32(0);
1826 } else
1827 encode_uint32(xdr, 0); /* implementation id array length=0 */
1828 }
1829
1830 static void encode_create_session(struct xdr_stream *xdr,
1831 const struct nfs41_create_session_args *args,
1832 struct compound_hdr *hdr)
1833 {
1834 __be32 *p;
1835 struct nfs_client *clp = args->client;
1836 struct rpc_clnt *clnt = clp->cl_rpcclient;
1837 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1838 u32 max_resp_sz_cached;
1839
1840 /*
1841 * Assumes OPEN is the biggest non-idempotent compound.
1842 * 2 is the verifier.
1843 */
1844 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE + 2)
1845 * XDR_UNIT + RPC_MAX_AUTH_SIZE;
1846
1847 encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1848 p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1849 p = xdr_encode_hyper(p, args->clientid);
1850 *p++ = cpu_to_be32(args->seqid); /*Sequence id */
1851 *p++ = cpu_to_be32(args->flags); /*flags */
1852
1853 /* Fore Channel */
1854 *p++ = cpu_to_be32(0); /* header padding size */
1855 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1856 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1857 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1858 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1859 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1860 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1861
1862 /* Back Channel */
1863 *p++ = cpu_to_be32(0); /* header padding size */
1864 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1865 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1866 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1867 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1868 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1869 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1870
1871 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1872 *p++ = cpu_to_be32(1);
1873 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1874
1875 /* authsys_parms rfc1831 */
1876 *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1877 p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1878 *p++ = cpu_to_be32(0); /* UID */
1879 *p++ = cpu_to_be32(0); /* GID */
1880 *p = cpu_to_be32(0); /* No more gids */
1881 }
1882
1883 static void encode_destroy_session(struct xdr_stream *xdr,
1884 const struct nfs4_session *session,
1885 struct compound_hdr *hdr)
1886 {
1887 encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1888 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1889 }
1890
1891 static void encode_destroy_clientid(struct xdr_stream *xdr,
1892 uint64_t clientid,
1893 struct compound_hdr *hdr)
1894 {
1895 encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1896 encode_uint64(xdr, clientid);
1897 }
1898
1899 static void encode_reclaim_complete(struct xdr_stream *xdr,
1900 const struct nfs41_reclaim_complete_args *args,
1901 struct compound_hdr *hdr)
1902 {
1903 encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1904 encode_uint32(xdr, args->one_fs);
1905 }
1906 #endif /* CONFIG_NFS_V4_1 */
1907
1908 static void encode_sequence(struct xdr_stream *xdr,
1909 const struct nfs4_sequence_args *args,
1910 struct compound_hdr *hdr)
1911 {
1912 #if defined(CONFIG_NFS_V4_1)
1913 struct nfs4_session *session;
1914 struct nfs4_slot_table *tp;
1915 struct nfs4_slot *slot = args->sa_slot;
1916 __be32 *p;
1917
1918 tp = slot->table;
1919 session = tp->session;
1920 if (!session)
1921 return;
1922
1923 encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1924
1925 /*
1926 * Sessionid + seqid + slotid + max slotid + cache_this
1927 */
1928 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1929 "max_slotid=%d cache_this=%d\n",
1930 __func__,
1931 ((u32 *)session->sess_id.data)[0],
1932 ((u32 *)session->sess_id.data)[1],
1933 ((u32 *)session->sess_id.data)[2],
1934 ((u32 *)session->sess_id.data)[3],
1935 slot->seq_nr, slot->slot_nr,
1936 tp->highest_used_slotid, args->sa_cache_this);
1937 p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1938 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1939 *p++ = cpu_to_be32(slot->seq_nr);
1940 *p++ = cpu_to_be32(slot->slot_nr);
1941 *p++ = cpu_to_be32(tp->highest_used_slotid);
1942 *p = cpu_to_be32(args->sa_cache_this);
1943 #endif /* CONFIG_NFS_V4_1 */
1944 }
1945
1946 #ifdef CONFIG_NFS_V4_1
1947 static void
1948 encode_getdeviceinfo(struct xdr_stream *xdr,
1949 const struct nfs4_getdeviceinfo_args *args,
1950 struct compound_hdr *hdr)
1951 {
1952 __be32 *p;
1953
1954 encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1955 p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1956 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1957 NFS4_DEVICEID4_SIZE);
1958 *p++ = cpu_to_be32(args->pdev->layout_type);
1959 *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */
1960
1961 p = reserve_space(xdr, 4 + 4);
1962 *p++ = cpu_to_be32(1); /* bitmap length */
1963 *p++ = cpu_to_be32(args->notify_types);
1964 }
1965
1966 static void
1967 encode_layoutget(struct xdr_stream *xdr,
1968 const struct nfs4_layoutget_args *args,
1969 struct compound_hdr *hdr)
1970 {
1971 __be32 *p;
1972
1973 encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1974 p = reserve_space(xdr, 36);
1975 *p++ = cpu_to_be32(0); /* Signal layout available */
1976 *p++ = cpu_to_be32(args->type);
1977 *p++ = cpu_to_be32(args->range.iomode);
1978 p = xdr_encode_hyper(p, args->range.offset);
1979 p = xdr_encode_hyper(p, args->range.length);
1980 p = xdr_encode_hyper(p, args->minlength);
1981 encode_nfs4_stateid(xdr, &args->stateid);
1982 encode_uint32(xdr, args->maxcount);
1983
1984 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1985 __func__,
1986 args->type,
1987 args->range.iomode,
1988 (unsigned long)args->range.offset,
1989 (unsigned long)args->range.length,
1990 args->maxcount);
1991 }
1992
1993 static int
1994 encode_layoutcommit(struct xdr_stream *xdr,
1995 struct inode *inode,
1996 const struct nfs4_layoutcommit_args *args,
1997 struct compound_hdr *hdr)
1998 {
1999 __be32 *p;
2000
2001 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
2002 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
2003
2004 encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2005 p = reserve_space(xdr, 20);
2006 /* Only whole file layouts */
2007 p = xdr_encode_hyper(p, 0); /* offset */
2008 p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
2009 *p = cpu_to_be32(0); /* reclaim */
2010 encode_nfs4_stateid(xdr, &args->stateid);
2011 if (args->lastbytewritten != U64_MAX) {
2012 p = reserve_space(xdr, 20);
2013 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2014 p = xdr_encode_hyper(p, args->lastbytewritten);
2015 } else {
2016 p = reserve_space(xdr, 12);
2017 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2018 }
2019 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2020 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2021
2022 encode_uint32(xdr, args->layoutupdate_len);
2023 if (args->layoutupdate_pages)
2024 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2025 args->layoutupdate_len);
2026
2027 return 0;
2028 }
2029
2030 static void
2031 encode_layoutreturn(struct xdr_stream *xdr,
2032 const struct nfs4_layoutreturn_args *args,
2033 struct compound_hdr *hdr)
2034 {
2035 __be32 *p;
2036
2037 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2038 p = reserve_space(xdr, 16);
2039 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
2040 *p++ = cpu_to_be32(args->layout_type);
2041 *p++ = cpu_to_be32(args->range.iomode);
2042 *p = cpu_to_be32(RETURN_FILE);
2043 p = reserve_space(xdr, 16);
2044 p = xdr_encode_hyper(p, args->range.offset);
2045 p = xdr_encode_hyper(p, args->range.length);
2046 spin_lock(&args->inode->i_lock);
2047 encode_nfs4_stateid(xdr, &args->stateid);
2048 spin_unlock(&args->inode->i_lock);
2049 if (args->ld_private->ops && args->ld_private->ops->encode)
2050 args->ld_private->ops->encode(xdr, args, args->ld_private);
2051 else
2052 encode_uint32(xdr, 0);
2053 }
2054
2055 static int
2056 encode_secinfo_no_name(struct xdr_stream *xdr,
2057 const struct nfs41_secinfo_no_name_args *args,
2058 struct compound_hdr *hdr)
2059 {
2060 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2061 encode_uint32(xdr, args->style);
2062 return 0;
2063 }
2064
2065 static void encode_test_stateid(struct xdr_stream *xdr,
2066 const struct nfs41_test_stateid_args *args,
2067 struct compound_hdr *hdr)
2068 {
2069 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2070 encode_uint32(xdr, 1);
2071 encode_nfs4_stateid(xdr, args->stateid);
2072 }
2073
2074 static void encode_free_stateid(struct xdr_stream *xdr,
2075 const struct nfs41_free_stateid_args *args,
2076 struct compound_hdr *hdr)
2077 {
2078 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2079 encode_nfs4_stateid(xdr, &args->stateid);
2080 }
2081 #else
2082 static inline void
2083 encode_layoutreturn(struct xdr_stream *xdr,
2084 const struct nfs4_layoutreturn_args *args,
2085 struct compound_hdr *hdr)
2086 {
2087 }
2088
2089 static void
2090 encode_layoutget(struct xdr_stream *xdr,
2091 const struct nfs4_layoutget_args *args,
2092 struct compound_hdr *hdr)
2093 {
2094 }
2095 #endif /* CONFIG_NFS_V4_1 */
2096
2097 /*
2098 * END OF "GENERIC" ENCODE ROUTINES.
2099 */
2100
2101 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2102 {
2103 #if defined(CONFIG_NFS_V4_1)
2104 struct nfs4_session *session = args->sa_slot->table->session;
2105 if (session)
2106 return session->clp->cl_mvops->minor_version;
2107 #endif /* CONFIG_NFS_V4_1 */
2108 return 0;
2109 }
2110
2111 /*
2112 * Encode an ACCESS request
2113 */
2114 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2115 const void *data)
2116 {
2117 const struct nfs4_accessargs *args = data;
2118 struct compound_hdr hdr = {
2119 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2120 };
2121
2122 encode_compound_hdr(xdr, req, &hdr);
2123 encode_sequence(xdr, &args->seq_args, &hdr);
2124 encode_putfh(xdr, args->fh, &hdr);
2125 encode_access(xdr, args->access, &hdr);
2126 if (args->bitmask)
2127 encode_getfattr(xdr, args->bitmask, &hdr);
2128 encode_nops(&hdr);
2129 }
2130
2131 /*
2132 * Encode LOOKUP request
2133 */
2134 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2135 const void *data)
2136 {
2137 const struct nfs4_lookup_arg *args = data;
2138 struct compound_hdr hdr = {
2139 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2140 };
2141
2142 encode_compound_hdr(xdr, req, &hdr);
2143 encode_sequence(xdr, &args->seq_args, &hdr);
2144 encode_putfh(xdr, args->dir_fh, &hdr);
2145 encode_lookup(xdr, args->name, &hdr);
2146 encode_getfh(xdr, &hdr);
2147 encode_getfattr(xdr, args->bitmask, &hdr);
2148 encode_nops(&hdr);
2149 }
2150
2151 /*
2152 * Encode LOOKUPP request
2153 */
2154 static void nfs4_xdr_enc_lookupp(struct rpc_rqst *req, struct xdr_stream *xdr,
2155 const void *data)
2156 {
2157 const struct nfs4_lookupp_arg *args = data;
2158 struct compound_hdr hdr = {
2159 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2160 };
2161
2162 encode_compound_hdr(xdr, req, &hdr);
2163 encode_sequence(xdr, &args->seq_args, &hdr);
2164 encode_putfh(xdr, args->fh, &hdr);
2165 encode_lookupp(xdr, &hdr);
2166 encode_getfh(xdr, &hdr);
2167 encode_getfattr(xdr, args->bitmask, &hdr);
2168 encode_nops(&hdr);
2169 }
2170
2171 /*
2172 * Encode LOOKUP_ROOT request
2173 */
2174 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2175 struct xdr_stream *xdr,
2176 const void *data)
2177 {
2178 const struct nfs4_lookup_root_arg *args = data;
2179 struct compound_hdr hdr = {
2180 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2181 };
2182
2183 encode_compound_hdr(xdr, req, &hdr);
2184 encode_sequence(xdr, &args->seq_args, &hdr);
2185 encode_putrootfh(xdr, &hdr);
2186 encode_getfh(xdr, &hdr);
2187 encode_getfattr(xdr, args->bitmask, &hdr);
2188 encode_nops(&hdr);
2189 }
2190
2191 /*
2192 * Encode REMOVE request
2193 */
2194 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2195 const void *data)
2196 {
2197 const struct nfs_removeargs *args = data;
2198 struct compound_hdr hdr = {
2199 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2200 };
2201
2202 encode_compound_hdr(xdr, req, &hdr);
2203 encode_sequence(xdr, &args->seq_args, &hdr);
2204 encode_putfh(xdr, args->fh, &hdr);
2205 encode_remove(xdr, &args->name, &hdr);
2206 encode_nops(&hdr);
2207 }
2208
2209 /*
2210 * Encode RENAME request
2211 */
2212 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2213 const void *data)
2214 {
2215 const struct nfs_renameargs *args = data;
2216 struct compound_hdr hdr = {
2217 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2218 };
2219
2220 encode_compound_hdr(xdr, req, &hdr);
2221 encode_sequence(xdr, &args->seq_args, &hdr);
2222 encode_putfh(xdr, args->old_dir, &hdr);
2223 encode_savefh(xdr, &hdr);
2224 encode_putfh(xdr, args->new_dir, &hdr);
2225 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2226 encode_nops(&hdr);
2227 }
2228
2229 /*
2230 * Encode LINK request
2231 */
2232 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2233 const void *data)
2234 {
2235 const struct nfs4_link_arg *args = data;
2236 struct compound_hdr hdr = {
2237 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2238 };
2239
2240 encode_compound_hdr(xdr, req, &hdr);
2241 encode_sequence(xdr, &args->seq_args, &hdr);
2242 encode_putfh(xdr, args->fh, &hdr);
2243 encode_savefh(xdr, &hdr);
2244 encode_putfh(xdr, args->dir_fh, &hdr);
2245 encode_link(xdr, args->name, &hdr);
2246 encode_restorefh(xdr, &hdr);
2247 encode_getfattr(xdr, args->bitmask, &hdr);
2248 encode_nops(&hdr);
2249 }
2250
2251 /*
2252 * Encode CREATE request
2253 */
2254 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2255 const void *data)
2256 {
2257 const struct nfs4_create_arg *args = data;
2258 struct compound_hdr hdr = {
2259 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2260 };
2261
2262 encode_compound_hdr(xdr, req, &hdr);
2263 encode_sequence(xdr, &args->seq_args, &hdr);
2264 encode_putfh(xdr, args->dir_fh, &hdr);
2265 encode_create(xdr, args, &hdr);
2266 encode_getfh(xdr, &hdr);
2267 encode_getfattr(xdr, args->bitmask, &hdr);
2268 encode_nops(&hdr);
2269 }
2270
2271 /*
2272 * Encode SYMLINK request
2273 */
2274 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2275 const void *data)
2276 {
2277 const struct nfs4_create_arg *args = data;
2278
2279 nfs4_xdr_enc_create(req, xdr, args);
2280 }
2281
2282 /*
2283 * Encode GETATTR request
2284 */
2285 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2286 const void *data)
2287 {
2288 const struct nfs4_getattr_arg *args = data;
2289 struct compound_hdr hdr = {
2290 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2291 };
2292
2293 encode_compound_hdr(xdr, req, &hdr);
2294 encode_sequence(xdr, &args->seq_args, &hdr);
2295 encode_putfh(xdr, args->fh, &hdr);
2296 encode_getfattr(xdr, args->bitmask, &hdr);
2297 encode_nops(&hdr);
2298 }
2299
2300 /*
2301 * Encode a CLOSE request
2302 */
2303 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2304 const void *data)
2305 {
2306 const struct nfs_closeargs *args = data;
2307 struct compound_hdr hdr = {
2308 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2309 };
2310
2311 encode_compound_hdr(xdr, req, &hdr);
2312 encode_sequence(xdr, &args->seq_args, &hdr);
2313 encode_putfh(xdr, args->fh, &hdr);
2314 if (args->lr_args)
2315 encode_layoutreturn(xdr, args->lr_args, &hdr);
2316 if (args->bitmask != NULL)
2317 encode_getfattr(xdr, args->bitmask, &hdr);
2318 encode_close(xdr, args, &hdr);
2319 encode_nops(&hdr);
2320 }
2321
2322 /*
2323 * Encode an OPEN request
2324 */
2325 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2326 const void *data)
2327 {
2328 const struct nfs_openargs *args = data;
2329 struct compound_hdr hdr = {
2330 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2331 };
2332
2333 encode_compound_hdr(xdr, req, &hdr);
2334 encode_sequence(xdr, &args->seq_args, &hdr);
2335 encode_putfh(xdr, args->fh, &hdr);
2336 encode_open(xdr, args, &hdr);
2337 encode_getfh(xdr, &hdr);
2338 if (args->access)
2339 encode_access(xdr, args->access, &hdr);
2340 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2341 if (args->lg_args) {
2342 encode_layoutget(xdr, args->lg_args, &hdr);
2343 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2344 args->lg_args->layout.pages,
2345 0, args->lg_args->layout.pglen);
2346 }
2347 encode_nops(&hdr);
2348 }
2349
2350 /*
2351 * Encode an OPEN_CONFIRM request
2352 */
2353 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2354 struct xdr_stream *xdr,
2355 const void *data)
2356 {
2357 const struct nfs_open_confirmargs *args = data;
2358 struct compound_hdr hdr = {
2359 .nops = 0,
2360 };
2361
2362 encode_compound_hdr(xdr, req, &hdr);
2363 encode_putfh(xdr, args->fh, &hdr);
2364 encode_open_confirm(xdr, args, &hdr);
2365 encode_nops(&hdr);
2366 }
2367
2368 /*
2369 * Encode an OPEN request with no attributes.
2370 */
2371 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2372 struct xdr_stream *xdr,
2373 const void *data)
2374 {
2375 const struct nfs_openargs *args = data;
2376 struct compound_hdr hdr = {
2377 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2378 };
2379
2380 encode_compound_hdr(xdr, req, &hdr);
2381 encode_sequence(xdr, &args->seq_args, &hdr);
2382 encode_putfh(xdr, args->fh, &hdr);
2383 encode_open(xdr, args, &hdr);
2384 if (args->access)
2385 encode_access(xdr, args->access, &hdr);
2386 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2387 if (args->lg_args) {
2388 encode_layoutget(xdr, args->lg_args, &hdr);
2389 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2390 args->lg_args->layout.pages,
2391 0, args->lg_args->layout.pglen);
2392 }
2393 encode_nops(&hdr);
2394 }
2395
2396 /*
2397 * Encode an OPEN_DOWNGRADE request
2398 */
2399 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2400 struct xdr_stream *xdr,
2401 const void *data)
2402 {
2403 const struct nfs_closeargs *args = data;
2404 struct compound_hdr hdr = {
2405 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2406 };
2407
2408 encode_compound_hdr(xdr, req, &hdr);
2409 encode_sequence(xdr, &args->seq_args, &hdr);
2410 encode_putfh(xdr, args->fh, &hdr);
2411 if (args->lr_args)
2412 encode_layoutreturn(xdr, args->lr_args, &hdr);
2413 encode_open_downgrade(xdr, args, &hdr);
2414 encode_nops(&hdr);
2415 }
2416
2417 /*
2418 * Encode a LOCK request
2419 */
2420 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2421 const void *data)
2422 {
2423 const struct nfs_lock_args *args = data;
2424 struct compound_hdr hdr = {
2425 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2426 };
2427
2428 encode_compound_hdr(xdr, req, &hdr);
2429 encode_sequence(xdr, &args->seq_args, &hdr);
2430 encode_putfh(xdr, args->fh, &hdr);
2431 encode_lock(xdr, args, &hdr);
2432 encode_nops(&hdr);
2433 }
2434
2435 /*
2436 * Encode a LOCKT request
2437 */
2438 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2439 const void *data)
2440 {
2441 const struct nfs_lockt_args *args = data;
2442 struct compound_hdr hdr = {
2443 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2444 };
2445
2446 encode_compound_hdr(xdr, req, &hdr);
2447 encode_sequence(xdr, &args->seq_args, &hdr);
2448 encode_putfh(xdr, args->fh, &hdr);
2449 encode_lockt(xdr, args, &hdr);
2450 encode_nops(&hdr);
2451 }
2452
2453 /*
2454 * Encode a LOCKU request
2455 */
2456 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2457 const void *data)
2458 {
2459 const struct nfs_locku_args *args = data;
2460 struct compound_hdr hdr = {
2461 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2462 };
2463
2464 encode_compound_hdr(xdr, req, &hdr);
2465 encode_sequence(xdr, &args->seq_args, &hdr);
2466 encode_putfh(xdr, args->fh, &hdr);
2467 encode_locku(xdr, args, &hdr);
2468 encode_nops(&hdr);
2469 }
2470
2471 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2472 struct xdr_stream *xdr,
2473 const void *data)
2474 {
2475 const struct nfs_release_lockowner_args *args = data;
2476 struct compound_hdr hdr = {
2477 .minorversion = 0,
2478 };
2479
2480 encode_compound_hdr(xdr, req, &hdr);
2481 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2482 encode_nops(&hdr);
2483 }
2484
2485 /*
2486 * Encode a READLINK request
2487 */
2488 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2489 const void *data)
2490 {
2491 const struct nfs4_readlink *args = data;
2492 struct compound_hdr hdr = {
2493 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2494 };
2495
2496 encode_compound_hdr(xdr, req, &hdr);
2497 encode_sequence(xdr, &args->seq_args, &hdr);
2498 encode_putfh(xdr, args->fh, &hdr);
2499 encode_readlink(xdr, args, req, &hdr);
2500
2501 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2502 args->pgbase, args->pglen);
2503 encode_nops(&hdr);
2504 }
2505
2506 /*
2507 * Encode a READDIR request
2508 */
2509 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2510 const void *data)
2511 {
2512 const struct nfs4_readdir_arg *args = data;
2513 struct compound_hdr hdr = {
2514 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2515 };
2516
2517 encode_compound_hdr(xdr, req, &hdr);
2518 encode_sequence(xdr, &args->seq_args, &hdr);
2519 encode_putfh(xdr, args->fh, &hdr);
2520 encode_readdir(xdr, args, req, &hdr);
2521
2522 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2523 args->pgbase, args->count);
2524 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2525 __func__, hdr.replen << 2, args->pages,
2526 args->pgbase, args->count);
2527 encode_nops(&hdr);
2528 }
2529
2530 /*
2531 * Encode a READ request
2532 */
2533 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2534 const void *data)
2535 {
2536 const struct nfs_pgio_args *args = data;
2537 struct compound_hdr hdr = {
2538 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2539 };
2540
2541 encode_compound_hdr(xdr, req, &hdr);
2542 encode_sequence(xdr, &args->seq_args, &hdr);
2543 encode_putfh(xdr, args->fh, &hdr);
2544 encode_read(xdr, args, &hdr);
2545
2546 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2547 args->pages, args->pgbase, args->count);
2548 req->rq_rcv_buf.flags |= XDRBUF_READ;
2549 encode_nops(&hdr);
2550 }
2551
2552 /*
2553 * Encode an SETATTR request
2554 */
2555 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2556 const void *data)
2557 {
2558 const struct nfs_setattrargs *args = data;
2559 struct compound_hdr hdr = {
2560 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2561 };
2562
2563 encode_compound_hdr(xdr, req, &hdr);
2564 encode_sequence(xdr, &args->seq_args, &hdr);
2565 encode_putfh(xdr, args->fh, &hdr);
2566 encode_setattr(xdr, args, args->server, &hdr);
2567 encode_getfattr(xdr, args->bitmask, &hdr);
2568 encode_nops(&hdr);
2569 }
2570
2571 /*
2572 * Encode a GETACL request
2573 */
2574 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2575 const void *data)
2576 {
2577 const struct nfs_getaclargs *args = data;
2578 struct compound_hdr hdr = {
2579 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2580 };
2581 const __u32 nfs4_acl_bitmap[1] = {
2582 [0] = FATTR4_WORD0_ACL,
2583 };
2584 uint32_t replen;
2585
2586 encode_compound_hdr(xdr, req, &hdr);
2587 encode_sequence(xdr, &args->seq_args, &hdr);
2588 encode_putfh(xdr, args->fh, &hdr);
2589 replen = hdr.replen + op_decode_hdr_maxsz;
2590 encode_getattr(xdr, nfs4_acl_bitmap, NULL,
2591 ARRAY_SIZE(nfs4_acl_bitmap), &hdr);
2592
2593 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2594 args->acl_pages, 0, args->acl_len);
2595
2596 encode_nops(&hdr);
2597 }
2598
2599 /*
2600 * Encode a WRITE request
2601 */
2602 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2603 const void *data)
2604 {
2605 const struct nfs_pgio_args *args = data;
2606 struct compound_hdr hdr = {
2607 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2608 };
2609
2610 encode_compound_hdr(xdr, req, &hdr);
2611 encode_sequence(xdr, &args->seq_args, &hdr);
2612 encode_putfh(xdr, args->fh, &hdr);
2613 encode_write(xdr, args, &hdr);
2614 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2615 if (args->bitmask)
2616 encode_getfattr(xdr, args->bitmask, &hdr);
2617 encode_nops(&hdr);
2618 }
2619
2620 /*
2621 * a COMMIT request
2622 */
2623 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2624 const void *data)
2625 {
2626 const struct nfs_commitargs *args = data;
2627 struct compound_hdr hdr = {
2628 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2629 };
2630
2631 encode_compound_hdr(xdr, req, &hdr);
2632 encode_sequence(xdr, &args->seq_args, &hdr);
2633 encode_putfh(xdr, args->fh, &hdr);
2634 encode_commit(xdr, args, &hdr);
2635 encode_nops(&hdr);
2636 }
2637
2638 /*
2639 * FSINFO request
2640 */
2641 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2642 const void *data)
2643 {
2644 const struct nfs4_fsinfo_arg *args = data;
2645 struct compound_hdr hdr = {
2646 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2647 };
2648
2649 encode_compound_hdr(xdr, req, &hdr);
2650 encode_sequence(xdr, &args->seq_args, &hdr);
2651 encode_putfh(xdr, args->fh, &hdr);
2652 encode_fsinfo(xdr, args->bitmask, &hdr);
2653 encode_nops(&hdr);
2654 }
2655
2656 /*
2657 * a PATHCONF request
2658 */
2659 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2660 const void *data)
2661 {
2662 const struct nfs4_pathconf_arg *args = data;
2663 struct compound_hdr hdr = {
2664 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2665 };
2666
2667 encode_compound_hdr(xdr, req, &hdr);
2668 encode_sequence(xdr, &args->seq_args, &hdr);
2669 encode_putfh(xdr, args->fh, &hdr);
2670 encode_getattr(xdr, nfs4_pathconf_bitmap, args->bitmask,
2671 ARRAY_SIZE(nfs4_pathconf_bitmap), &hdr);
2672 encode_nops(&hdr);
2673 }
2674
2675 /*
2676 * a STATFS request
2677 */
2678 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2679 const void *data)
2680 {
2681 const struct nfs4_statfs_arg *args = data;
2682 struct compound_hdr hdr = {
2683 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2684 };
2685
2686 encode_compound_hdr(xdr, req, &hdr);
2687 encode_sequence(xdr, &args->seq_args, &hdr);
2688 encode_putfh(xdr, args->fh, &hdr);
2689 encode_getattr(xdr, nfs4_statfs_bitmap, args->bitmask,
2690 ARRAY_SIZE(nfs4_statfs_bitmap), &hdr);
2691 encode_nops(&hdr);
2692 }
2693
2694 /*
2695 * GETATTR_BITMAP request
2696 */
2697 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2698 struct xdr_stream *xdr,
2699 const void *data)
2700 {
2701 const struct nfs4_server_caps_arg *args = data;
2702 const u32 *bitmask = args->bitmask;
2703 struct compound_hdr hdr = {
2704 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2705 };
2706
2707 encode_compound_hdr(xdr, req, &hdr);
2708 encode_sequence(xdr, &args->seq_args, &hdr);
2709 encode_putfh(xdr, args->fhandle, &hdr);
2710 encode_getattr(xdr, bitmask, NULL, 3, &hdr);
2711 encode_nops(&hdr);
2712 }
2713
2714 /*
2715 * a RENEW request
2716 */
2717 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2718 const void *data)
2719
2720 {
2721 const struct nfs_client *clp = data;
2722 struct compound_hdr hdr = {
2723 .nops = 0,
2724 };
2725
2726 encode_compound_hdr(xdr, req, &hdr);
2727 encode_renew(xdr, clp->cl_clientid, &hdr);
2728 encode_nops(&hdr);
2729 }
2730
2731 /*
2732 * a SETCLIENTID request
2733 */
2734 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2735 struct xdr_stream *xdr,
2736 const void *data)
2737 {
2738 const struct nfs4_setclientid *sc = data;
2739 struct compound_hdr hdr = {
2740 .nops = 0,
2741 };
2742
2743 encode_compound_hdr(xdr, req, &hdr);
2744 encode_setclientid(xdr, sc, &hdr);
2745 encode_nops(&hdr);
2746 }
2747
2748 /*
2749 * a SETCLIENTID_CONFIRM request
2750 */
2751 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2752 struct xdr_stream *xdr,
2753 const void *data)
2754 {
2755 const struct nfs4_setclientid_res *arg = data;
2756 struct compound_hdr hdr = {
2757 .nops = 0,
2758 };
2759
2760 encode_compound_hdr(xdr, req, &hdr);
2761 encode_setclientid_confirm(xdr, arg, &hdr);
2762 encode_nops(&hdr);
2763 }
2764
2765 /*
2766 * DELEGRETURN request
2767 */
2768 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2769 struct xdr_stream *xdr,
2770 const void *data)
2771 {
2772 const struct nfs4_delegreturnargs *args = data;
2773 struct compound_hdr hdr = {
2774 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2775 };
2776
2777 encode_compound_hdr(xdr, req, &hdr);
2778 encode_sequence(xdr, &args->seq_args, &hdr);
2779 encode_putfh(xdr, args->fhandle, &hdr);
2780 if (args->lr_args)
2781 encode_layoutreturn(xdr, args->lr_args, &hdr);
2782 if (args->bitmask)
2783 encode_getfattr(xdr, args->bitmask, &hdr);
2784 encode_delegreturn(xdr, args->stateid, &hdr);
2785 encode_nops(&hdr);
2786 }
2787
2788 /*
2789 * Encode FS_LOCATIONS request
2790 */
2791 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2792 struct xdr_stream *xdr,
2793 const void *data)
2794 {
2795 const struct nfs4_fs_locations_arg *args = data;
2796 struct compound_hdr hdr = {
2797 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2798 };
2799 uint32_t replen;
2800
2801 encode_compound_hdr(xdr, req, &hdr);
2802 encode_sequence(xdr, &args->seq_args, &hdr);
2803 if (args->migration) {
2804 encode_putfh(xdr, args->fh, &hdr);
2805 replen = hdr.replen;
2806 encode_fs_locations(xdr, args->bitmask, &hdr);
2807 if (args->renew)
2808 encode_renew(xdr, args->clientid, &hdr);
2809 } else {
2810 encode_putfh(xdr, args->dir_fh, &hdr);
2811 encode_lookup(xdr, args->name, &hdr);
2812 replen = hdr.replen;
2813 encode_fs_locations(xdr, args->bitmask, &hdr);
2814 }
2815
2816 /* Set up reply kvec to capture returned fs_locations array. */
2817 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2818 (struct page **)&args->page, 0, PAGE_SIZE);
2819 encode_nops(&hdr);
2820 }
2821
2822 /*
2823 * Encode SECINFO request
2824 */
2825 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2826 struct xdr_stream *xdr,
2827 const void *data)
2828 {
2829 const struct nfs4_secinfo_arg *args = data;
2830 struct compound_hdr hdr = {
2831 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2832 };
2833
2834 encode_compound_hdr(xdr, req, &hdr);
2835 encode_sequence(xdr, &args->seq_args, &hdr);
2836 encode_putfh(xdr, args->dir_fh, &hdr);
2837 encode_secinfo(xdr, args->name, &hdr);
2838 encode_nops(&hdr);
2839 }
2840
2841 /*
2842 * Encode FSID_PRESENT request
2843 */
2844 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2845 struct xdr_stream *xdr,
2846 const void *data)
2847 {
2848 const struct nfs4_fsid_present_arg *args = data;
2849 struct compound_hdr hdr = {
2850 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2851 };
2852
2853 encode_compound_hdr(xdr, req, &hdr);
2854 encode_sequence(xdr, &args->seq_args, &hdr);
2855 encode_putfh(xdr, args->fh, &hdr);
2856 encode_getfh(xdr, &hdr);
2857 if (args->renew)
2858 encode_renew(xdr, args->clientid, &hdr);
2859 encode_nops(&hdr);
2860 }
2861
2862 #if defined(CONFIG_NFS_V4_1)
2863 /*
2864 * BIND_CONN_TO_SESSION request
2865 */
2866 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2867 struct xdr_stream *xdr,
2868 const void *data)
2869 {
2870 const struct nfs41_bind_conn_to_session_args *args = data;
2871 struct compound_hdr hdr = {
2872 .minorversion = args->client->cl_mvops->minor_version,
2873 };
2874
2875 encode_compound_hdr(xdr, req, &hdr);
2876 encode_bind_conn_to_session(xdr, args, &hdr);
2877 encode_nops(&hdr);
2878 }
2879
2880 /*
2881 * EXCHANGE_ID request
2882 */
2883 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2884 struct xdr_stream *xdr,
2885 const void *data)
2886 {
2887 const struct nfs41_exchange_id_args *args = data;
2888 struct compound_hdr hdr = {
2889 .minorversion = args->client->cl_mvops->minor_version,
2890 };
2891
2892 encode_compound_hdr(xdr, req, &hdr);
2893 encode_exchange_id(xdr, args, &hdr);
2894 encode_nops(&hdr);
2895 }
2896
2897 /*
2898 * a CREATE_SESSION request
2899 */
2900 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2901 struct xdr_stream *xdr,
2902 const void *data)
2903 {
2904 const struct nfs41_create_session_args *args = data;
2905 struct compound_hdr hdr = {
2906 .minorversion = args->client->cl_mvops->minor_version,
2907 };
2908
2909 encode_compound_hdr(xdr, req, &hdr);
2910 encode_create_session(xdr, args, &hdr);
2911 encode_nops(&hdr);
2912 }
2913
2914 /*
2915 * a DESTROY_SESSION request
2916 */
2917 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2918 struct xdr_stream *xdr,
2919 const void *data)
2920 {
2921 const struct nfs4_session *session = data;
2922 struct compound_hdr hdr = {
2923 .minorversion = session->clp->cl_mvops->minor_version,
2924 };
2925
2926 encode_compound_hdr(xdr, req, &hdr);
2927 encode_destroy_session(xdr, session, &hdr);
2928 encode_nops(&hdr);
2929 }
2930
2931 /*
2932 * a DESTROY_CLIENTID request
2933 */
2934 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2935 struct xdr_stream *xdr,
2936 const void *data)
2937 {
2938 const struct nfs_client *clp = data;
2939 struct compound_hdr hdr = {
2940 .minorversion = clp->cl_mvops->minor_version,
2941 };
2942
2943 encode_compound_hdr(xdr, req, &hdr);
2944 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2945 encode_nops(&hdr);
2946 }
2947
2948 /*
2949 * a SEQUENCE request
2950 */
2951 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2952 const void *data)
2953 {
2954 const struct nfs4_sequence_args *args = data;
2955 struct compound_hdr hdr = {
2956 .minorversion = nfs4_xdr_minorversion(args),
2957 };
2958
2959 encode_compound_hdr(xdr, req, &hdr);
2960 encode_sequence(xdr, args, &hdr);
2961 encode_nops(&hdr);
2962 }
2963
2964 /*
2965 * a GET_LEASE_TIME request
2966 */
2967 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2968 struct xdr_stream *xdr,
2969 const void *data)
2970 {
2971 const struct nfs4_get_lease_time_args *args = data;
2972 struct compound_hdr hdr = {
2973 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2974 };
2975 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2976
2977 encode_compound_hdr(xdr, req, &hdr);
2978 encode_sequence(xdr, &args->la_seq_args, &hdr);
2979 encode_putrootfh(xdr, &hdr);
2980 encode_fsinfo(xdr, lease_bitmap, &hdr);
2981 encode_nops(&hdr);
2982 }
2983
2984 /*
2985 * a RECLAIM_COMPLETE request
2986 */
2987 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2988 struct xdr_stream *xdr,
2989 const void *data)
2990 {
2991 const struct nfs41_reclaim_complete_args *args = data;
2992 struct compound_hdr hdr = {
2993 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2994 };
2995
2996 encode_compound_hdr(xdr, req, &hdr);
2997 encode_sequence(xdr, &args->seq_args, &hdr);
2998 encode_reclaim_complete(xdr, args, &hdr);
2999 encode_nops(&hdr);
3000 }
3001
3002 /*
3003 * Encode GETDEVICEINFO request
3004 */
3005 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
3006 struct xdr_stream *xdr,
3007 const void *data)
3008 {
3009 const struct nfs4_getdeviceinfo_args *args = data;
3010 struct compound_hdr hdr = {
3011 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3012 };
3013
3014 encode_compound_hdr(xdr, req, &hdr);
3015 encode_sequence(xdr, &args->seq_args, &hdr);
3016 encode_getdeviceinfo(xdr, args, &hdr);
3017
3018 /* set up reply kvec. Subtract notification bitmap max size (2)
3019 * so that notification bitmap is put in xdr_buf tail */
3020 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
3021 args->pdev->pages, args->pdev->pgbase,
3022 args->pdev->pglen);
3023
3024 encode_nops(&hdr);
3025 }
3026
3027 /*
3028 * Encode LAYOUTGET request
3029 */
3030 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
3031 struct xdr_stream *xdr,
3032 const void *data)
3033 {
3034 const struct nfs4_layoutget_args *args = data;
3035 struct compound_hdr hdr = {
3036 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3037 };
3038
3039 encode_compound_hdr(xdr, req, &hdr);
3040 encode_sequence(xdr, &args->seq_args, &hdr);
3041 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3042 encode_layoutget(xdr, args, &hdr);
3043
3044 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
3045 args->layout.pages, 0, args->layout.pglen);
3046
3047 encode_nops(&hdr);
3048 }
3049
3050 /*
3051 * Encode LAYOUTCOMMIT request
3052 */
3053 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3054 struct xdr_stream *xdr,
3055 const void *priv)
3056 {
3057 const struct nfs4_layoutcommit_args *args = priv;
3058 struct nfs4_layoutcommit_data *data =
3059 container_of(args, struct nfs4_layoutcommit_data, args);
3060 struct compound_hdr hdr = {
3061 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3062 };
3063
3064 encode_compound_hdr(xdr, req, &hdr);
3065 encode_sequence(xdr, &args->seq_args, &hdr);
3066 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3067 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3068 encode_getfattr(xdr, args->bitmask, &hdr);
3069 encode_nops(&hdr);
3070 }
3071
3072 /*
3073 * Encode LAYOUTRETURN request
3074 */
3075 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3076 struct xdr_stream *xdr,
3077 const void *data)
3078 {
3079 const struct nfs4_layoutreturn_args *args = data;
3080 struct compound_hdr hdr = {
3081 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3082 };
3083
3084 encode_compound_hdr(xdr, req, &hdr);
3085 encode_sequence(xdr, &args->seq_args, &hdr);
3086 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3087 encode_layoutreturn(xdr, args, &hdr);
3088 encode_nops(&hdr);
3089 }
3090
3091 /*
3092 * Encode SECINFO_NO_NAME request
3093 */
3094 static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3095 struct xdr_stream *xdr,
3096 const void *data)
3097 {
3098 const struct nfs41_secinfo_no_name_args *args = data;
3099 struct compound_hdr hdr = {
3100 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3101 };
3102
3103 encode_compound_hdr(xdr, req, &hdr);
3104 encode_sequence(xdr, &args->seq_args, &hdr);
3105 encode_putrootfh(xdr, &hdr);
3106 encode_secinfo_no_name(xdr, args, &hdr);
3107 encode_nops(&hdr);
3108 }
3109
3110 /*
3111 * Encode TEST_STATEID request
3112 */
3113 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3114 struct xdr_stream *xdr,
3115 const void *data)
3116 {
3117 const struct nfs41_test_stateid_args *args = data;
3118 struct compound_hdr hdr = {
3119 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3120 };
3121
3122 encode_compound_hdr(xdr, req, &hdr);
3123 encode_sequence(xdr, &args->seq_args, &hdr);
3124 encode_test_stateid(xdr, args, &hdr);
3125 encode_nops(&hdr);
3126 }
3127
3128 /*
3129 * Encode FREE_STATEID request
3130 */
3131 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3132 struct xdr_stream *xdr,
3133 const void *data)
3134 {
3135 const struct nfs41_free_stateid_args *args = data;
3136 struct compound_hdr hdr = {
3137 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3138 };
3139
3140 encode_compound_hdr(xdr, req, &hdr);
3141 encode_sequence(xdr, &args->seq_args, &hdr);
3142 encode_free_stateid(xdr, args, &hdr);
3143 encode_nops(&hdr);
3144 }
3145 #endif /* CONFIG_NFS_V4_1 */
3146
3147 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3148 {
3149 dprintk("nfs: %s: prematurely hit end of receive buffer. "
3150 "Remaining buffer length is %tu words.\n",
3151 func, xdr->end - xdr->p);
3152 }
3153
3154 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3155 {
3156 ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3157 NFS4_OPAQUE_LIMIT);
3158 if (unlikely(ret < 0)) {
3159 if (ret == -EBADMSG)
3160 print_overflow_msg(__func__, xdr);
3161 return -EIO;
3162 }
3163 *len = ret;
3164 return 0;
3165 }
3166
3167 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3168 {
3169 __be32 *p;
3170
3171 p = xdr_inline_decode(xdr, 8);
3172 if (unlikely(!p))
3173 goto out_overflow;
3174 hdr->status = be32_to_cpup(p++);
3175 hdr->taglen = be32_to_cpup(p);
3176
3177 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3178 if (unlikely(!p))
3179 goto out_overflow;
3180 hdr->tag = (char *)p;
3181 p += XDR_QUADLEN(hdr->taglen);
3182 hdr->nops = be32_to_cpup(p);
3183 if (unlikely(hdr->nops < 1))
3184 return nfs4_stat_to_errno(hdr->status);
3185 return 0;
3186 out_overflow:
3187 print_overflow_msg(__func__, xdr);
3188 return -EIO;
3189 }
3190
3191 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3192 int *nfs_retval)
3193 {
3194 __be32 *p;
3195 uint32_t opnum;
3196 int32_t nfserr;
3197
3198 p = xdr_inline_decode(xdr, 8);
3199 if (unlikely(!p))
3200 goto out_overflow;
3201 opnum = be32_to_cpup(p++);
3202 if (unlikely(opnum != expected))
3203 goto out_bad_operation;
3204 nfserr = be32_to_cpup(p);
3205 if (nfserr == NFS_OK)
3206 *nfs_retval = 0;
3207 else
3208 *nfs_retval = nfs4_stat_to_errno(nfserr);
3209 return true;
3210 out_bad_operation:
3211 dprintk("nfs: Server returned operation"
3212 " %d but we issued a request for %d\n",
3213 opnum, expected);
3214 *nfs_retval = -EREMOTEIO;
3215 return false;
3216 out_overflow:
3217 print_overflow_msg(__func__, xdr);
3218 *nfs_retval = -EIO;
3219 return false;
3220 }
3221
3222 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3223 {
3224 int retval;
3225
3226 __decode_op_hdr(xdr, expected, &retval);
3227 return retval;
3228 }
3229
3230 /* Dummy routine */
3231 static int decode_ace(struct xdr_stream *xdr, void *ace)
3232 {
3233 __be32 *p;
3234 unsigned int strlen;
3235 char *str;
3236
3237 p = xdr_inline_decode(xdr, 12);
3238 if (likely(p))
3239 return decode_opaque_inline(xdr, &strlen, &str);
3240 print_overflow_msg(__func__, xdr);
3241 return -EIO;
3242 }
3243
3244 static ssize_t
3245 decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
3246 {
3247 ssize_t ret;
3248
3249 ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
3250 if (likely(ret >= 0))
3251 return ret;
3252 if (ret == -EMSGSIZE)
3253 return sz;
3254 print_overflow_msg(__func__, xdr);
3255 return -EIO;
3256 }
3257
3258 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3259 {
3260 ssize_t ret;
3261 ret = decode_bitmap4(xdr, bitmap, 3);
3262 return ret < 0 ? ret : 0;
3263 }
3264
3265 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3266 {
3267 __be32 *p;
3268
3269 p = xdr_inline_decode(xdr, 4);
3270 if (unlikely(!p))
3271 goto out_overflow;
3272 *attrlen = be32_to_cpup(p);
3273 *savep = xdr_stream_pos(xdr);
3274 return 0;
3275 out_overflow:
3276 print_overflow_msg(__func__, xdr);
3277 return -EIO;
3278 }
3279
3280 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3281 {
3282 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3283 int ret;
3284 ret = decode_attr_bitmap(xdr, bitmask);
3285 if (unlikely(ret < 0))
3286 return ret;
3287 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3288 } else
3289 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3290 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3291 bitmask[0], bitmask[1], bitmask[2]);
3292 return 0;
3293 }
3294
3295 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3296 {
3297 __be32 *p;
3298 int ret = 0;
3299
3300 *type = 0;
3301 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3302 return -EIO;
3303 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3304 p = xdr_inline_decode(xdr, 4);
3305 if (unlikely(!p))
3306 goto out_overflow;
3307 *type = be32_to_cpup(p);
3308 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3309 dprintk("%s: bad type %d\n", __func__, *type);
3310 return -EIO;
3311 }
3312 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3313 ret = NFS_ATTR_FATTR_TYPE;
3314 }
3315 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3316 return ret;
3317 out_overflow:
3318 print_overflow_msg(__func__, xdr);
3319 return -EIO;
3320 }
3321
3322 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3323 uint32_t *bitmap, uint32_t *type)
3324 {
3325 __be32 *p;
3326
3327 *type = 0;
3328 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3329 return -EIO;
3330 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3331 p = xdr_inline_decode(xdr, 4);
3332 if (unlikely(!p))
3333 goto out_overflow;
3334 *type = be32_to_cpup(p);
3335 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3336 }
3337 dprintk("%s: expire type=0x%x\n", __func__, *type);
3338 return 0;
3339 out_overflow:
3340 print_overflow_msg(__func__, xdr);
3341 return -EIO;
3342 }
3343
3344 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3345 {
3346 __be32 *p;
3347 int ret = 0;
3348
3349 *change = 0;
3350 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3351 return -EIO;
3352 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3353 p = xdr_inline_decode(xdr, 8);
3354 if (unlikely(!p))
3355 goto out_overflow;
3356 xdr_decode_hyper(p, change);
3357 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3358 ret = NFS_ATTR_FATTR_CHANGE;
3359 }
3360 dprintk("%s: change attribute=%Lu\n", __func__,
3361 (unsigned long long)*change);
3362 return ret;
3363 out_overflow:
3364 print_overflow_msg(__func__, xdr);
3365 return -EIO;
3366 }
3367
3368 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3369 {
3370 __be32 *p;
3371 int ret = 0;
3372
3373 *size = 0;
3374 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3375 return -EIO;
3376 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3377 p = xdr_inline_decode(xdr, 8);
3378 if (unlikely(!p))
3379 goto out_overflow;
3380 xdr_decode_hyper(p, size);
3381 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3382 ret = NFS_ATTR_FATTR_SIZE;
3383 }
3384 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3385 return ret;
3386 out_overflow:
3387 print_overflow_msg(__func__, xdr);
3388 return -EIO;
3389 }
3390
3391 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3392 {
3393 __be32 *p;
3394
3395 *res = 0;
3396 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3397 return -EIO;
3398 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3399 p = xdr_inline_decode(xdr, 4);
3400 if (unlikely(!p))
3401 goto out_overflow;
3402 *res = be32_to_cpup(p);
3403 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3404 }
3405 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3406 return 0;
3407 out_overflow:
3408 print_overflow_msg(__func__, xdr);
3409 return -EIO;
3410 }
3411
3412 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3413 {
3414 __be32 *p;
3415
3416 *res = 0;
3417 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3418 return -EIO;
3419 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3420 p = xdr_inline_decode(xdr, 4);
3421 if (unlikely(!p))
3422 goto out_overflow;
3423 *res = be32_to_cpup(p);
3424 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3425 }
3426 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3427 return 0;
3428 out_overflow:
3429 print_overflow_msg(__func__, xdr);
3430 return -EIO;
3431 }
3432
3433 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3434 {
3435 __be32 *p;
3436 int ret = 0;
3437
3438 fsid->major = 0;
3439 fsid->minor = 0;
3440 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3441 return -EIO;
3442 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3443 p = xdr_inline_decode(xdr, 16);
3444 if (unlikely(!p))
3445 goto out_overflow;
3446 p = xdr_decode_hyper(p, &fsid->major);
3447 xdr_decode_hyper(p, &fsid->minor);
3448 bitmap[0] &= ~FATTR4_WORD0_FSID;
3449 ret = NFS_ATTR_FATTR_FSID;
3450 }
3451 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3452 (unsigned long long)fsid->major,
3453 (unsigned long long)fsid->minor);
3454 return ret;
3455 out_overflow:
3456 print_overflow_msg(__func__, xdr);
3457 return -EIO;
3458 }
3459
3460 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3461 {
3462 __be32 *p;
3463
3464 *res = 60;
3465 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3466 return -EIO;
3467 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3468 p = xdr_inline_decode(xdr, 4);
3469 if (unlikely(!p))
3470 goto out_overflow;
3471 *res = be32_to_cpup(p);
3472 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3473 }
3474 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3475 return 0;
3476 out_overflow:
3477 print_overflow_msg(__func__, xdr);
3478 return -EIO;
3479 }
3480
3481 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3482 {
3483 __be32 *p;
3484
3485 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3486 return -EIO;
3487 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3488 p = xdr_inline_decode(xdr, 4);
3489 if (unlikely(!p))
3490 goto out_overflow;
3491 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3492 *res = -be32_to_cpup(p);
3493 }
3494 return 0;
3495 out_overflow:
3496 print_overflow_msg(__func__, xdr);
3497 return -EIO;
3498 }
3499
3500 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3501 uint32_t *bitmap, uint32_t *bitmask)
3502 {
3503 if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3504 int ret;
3505 ret = decode_attr_bitmap(xdr, bitmask);
3506 if (unlikely(ret < 0))
3507 return ret;
3508 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3509 } else
3510 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3511 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3512 bitmask[0], bitmask[1], bitmask[2]);
3513 return 0;
3514 }
3515
3516 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3517 {
3518 __be32 *p;
3519 u32 len;
3520
3521 if (fh != NULL)
3522 memset(fh, 0, sizeof(*fh));
3523
3524 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3525 return -EIO;
3526 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3527 p = xdr_inline_decode(xdr, 4);
3528 if (unlikely(!p))
3529 goto out_overflow;
3530 len = be32_to_cpup(p);
3531 if (len > NFS4_FHSIZE)
3532 return -EIO;
3533 p = xdr_inline_decode(xdr, len);
3534 if (unlikely(!p))
3535 goto out_overflow;
3536 if (fh != NULL) {
3537 memcpy(fh->data, p, len);
3538 fh->size = len;
3539 }
3540 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3541 }
3542 return 0;
3543 out_overflow:
3544 print_overflow_msg(__func__, xdr);
3545 return -EIO;
3546 }
3547
3548 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3549 {
3550 __be32 *p;
3551
3552 *res = 0;
3553 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3554 return -EIO;
3555 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3556 p = xdr_inline_decode(xdr, 4);
3557 if (unlikely(!p))
3558 goto out_overflow;
3559 *res = be32_to_cpup(p);
3560 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3561 }
3562 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3563 return 0;
3564 out_overflow:
3565 print_overflow_msg(__func__, xdr);
3566 return -EIO;
3567 }
3568
3569 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3570 {
3571 __be32 *p;
3572 int ret = 0;
3573
3574 *fileid = 0;
3575 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3576 return -EIO;
3577 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3578 p = xdr_inline_decode(xdr, 8);
3579 if (unlikely(!p))
3580 goto out_overflow;
3581 xdr_decode_hyper(p, fileid);
3582 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3583 ret = NFS_ATTR_FATTR_FILEID;
3584 }
3585 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3586 return ret;
3587 out_overflow:
3588 print_overflow_msg(__func__, xdr);
3589 return -EIO;
3590 }
3591
3592 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3593 {
3594 __be32 *p;
3595 int ret = 0;
3596
3597 *fileid = 0;
3598 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3599 return -EIO;
3600 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3601 p = xdr_inline_decode(xdr, 8);
3602 if (unlikely(!p))
3603 goto out_overflow;
3604 xdr_decode_hyper(p, fileid);
3605 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3606 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3607 }
3608 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3609 return ret;
3610 out_overflow:
3611 print_overflow_msg(__func__, xdr);
3612 return -EIO;
3613 }
3614
3615 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3616 {
3617 __be32 *p;
3618 int status = 0;
3619
3620 *res = 0;
3621 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3622 return -EIO;
3623 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3624 p = xdr_inline_decode(xdr, 8);
3625 if (unlikely(!p))
3626 goto out_overflow;
3627 xdr_decode_hyper(p, res);
3628 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3629 }
3630 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3631 return status;
3632 out_overflow:
3633 print_overflow_msg(__func__, xdr);
3634 return -EIO;
3635 }
3636
3637 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3638 {
3639 __be32 *p;
3640 int status = 0;
3641
3642 *res = 0;
3643 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3644 return -EIO;
3645 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3646 p = xdr_inline_decode(xdr, 8);
3647 if (unlikely(!p))
3648 goto out_overflow;
3649 xdr_decode_hyper(p, res);
3650 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3651 }
3652 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3653 return status;
3654 out_overflow:
3655 print_overflow_msg(__func__, xdr);
3656 return -EIO;
3657 }
3658
3659 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3660 {
3661 __be32 *p;
3662 int status = 0;
3663
3664 *res = 0;
3665 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3666 return -EIO;
3667 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3668 p = xdr_inline_decode(xdr, 8);
3669 if (unlikely(!p))
3670 goto out_overflow;
3671 xdr_decode_hyper(p, res);
3672 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3673 }
3674 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3675 return status;
3676 out_overflow:
3677 print_overflow_msg(__func__, xdr);
3678 return -EIO;
3679 }
3680
3681 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3682 {
3683 u32 n;
3684 __be32 *p;
3685 int status = 0;
3686
3687 p = xdr_inline_decode(xdr, 4);
3688 if (unlikely(!p))
3689 goto out_overflow;
3690 n = be32_to_cpup(p);
3691 if (n == 0)
3692 goto root_path;
3693 dprintk("pathname4: ");
3694 if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3695 dprintk("cannot parse %d components in path\n", n);
3696 goto out_eio;
3697 }
3698 for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3699 struct nfs4_string *component = &path->components[path->ncomponents];
3700 status = decode_opaque_inline(xdr, &component->len, &component->data);
3701 if (unlikely(status != 0))
3702 goto out_eio;
3703 ifdebug (XDR)
3704 pr_cont("%s%.*s ",
3705 (path->ncomponents != n ? "/ " : ""),
3706 component->len, component->data);
3707 }
3708 out:
3709 return status;
3710 root_path:
3711 /* a root pathname is sent as a zero component4 */
3712 path->ncomponents = 1;
3713 path->components[0].len=0;
3714 path->components[0].data=NULL;
3715 dprintk("pathname4: /\n");
3716 goto out;
3717 out_eio:
3718 dprintk(" status %d", status);
3719 status = -EIO;
3720 goto out;
3721 out_overflow:
3722 print_overflow_msg(__func__, xdr);
3723 return -EIO;
3724 }
3725
3726 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3727 {
3728 int n;
3729 __be32 *p;
3730 int status = -EIO;
3731
3732 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3733 goto out;
3734 status = 0;
3735 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3736 goto out;
3737 bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3738 status = -EIO;
3739 /* Ignore borken servers that return unrequested attrs */
3740 if (unlikely(res == NULL))
3741 goto out;
3742 dprintk("%s: fsroot:\n", __func__);
3743 status = decode_pathname(xdr, &res->fs_path);
3744 if (unlikely(status != 0))
3745 goto out;
3746 p = xdr_inline_decode(xdr, 4);
3747 if (unlikely(!p))
3748 goto out_overflow;
3749 n = be32_to_cpup(p);
3750 if (n <= 0)
3751 goto out_eio;
3752 for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3753 u32 m;
3754 struct nfs4_fs_location *loc;
3755
3756 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3757 break;
3758 loc = &res->locations[res->nlocations];
3759 p = xdr_inline_decode(xdr, 4);
3760 if (unlikely(!p))
3761 goto out_overflow;
3762 m = be32_to_cpup(p);
3763
3764 dprintk("%s: servers:\n", __func__);
3765 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3766 struct nfs4_string *server;
3767
3768 if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3769 unsigned int i;
3770 dprintk("%s: using first %u of %u servers "
3771 "returned for location %u\n",
3772 __func__,
3773 NFS4_FS_LOCATION_MAXSERVERS,
3774 m, res->nlocations);
3775 for (i = loc->nservers; i < m; i++) {
3776 unsigned int len;
3777 char *data;
3778 status = decode_opaque_inline(xdr, &len, &data);
3779 if (unlikely(status != 0))
3780 goto out_eio;
3781 }
3782 break;
3783 }
3784 server = &loc->servers[loc->nservers];
3785 status = decode_opaque_inline(xdr, &server->len, &server->data);
3786 if (unlikely(status != 0))
3787 goto out_eio;
3788 dprintk("%s ", server->data);
3789 }
3790 status = decode_pathname(xdr, &loc->rootpath);
3791 if (unlikely(status != 0))
3792 goto out_eio;
3793 }
3794 if (res->nlocations != 0)
3795 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3796 out:
3797 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3798 return status;
3799 out_overflow:
3800 print_overflow_msg(__func__, xdr);
3801 out_eio:
3802 status = -EIO;
3803 goto out;
3804 }
3805
3806 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3807 {
3808 __be32 *p;
3809 int status = 0;
3810
3811 *res = 0;
3812 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3813 return -EIO;
3814 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3815 p = xdr_inline_decode(xdr, 8);
3816 if (unlikely(!p))
3817 goto out_overflow;
3818 xdr_decode_hyper(p, res);
3819 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3820 }
3821 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3822 return status;
3823 out_overflow:
3824 print_overflow_msg(__func__, xdr);
3825 return -EIO;
3826 }
3827
3828 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3829 {
3830 __be32 *p;
3831 int status = 0;
3832
3833 *maxlink = 1;
3834 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3835 return -EIO;
3836 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3837 p = xdr_inline_decode(xdr, 4);
3838 if (unlikely(!p))
3839 goto out_overflow;
3840 *maxlink = be32_to_cpup(p);
3841 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3842 }
3843 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3844 return status;
3845 out_overflow:
3846 print_overflow_msg(__func__, xdr);
3847 return -EIO;
3848 }
3849
3850 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3851 {
3852 __be32 *p;
3853 int status = 0;
3854
3855 *maxname = 1024;
3856 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3857 return -EIO;
3858 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3859 p = xdr_inline_decode(xdr, 4);
3860 if (unlikely(!p))
3861 goto out_overflow;
3862 *maxname = be32_to_cpup(p);
3863 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3864 }
3865 dprintk("%s: maxname=%u\n", __func__, *maxname);
3866 return status;
3867 out_overflow:
3868 print_overflow_msg(__func__, xdr);
3869 return -EIO;
3870 }
3871
3872 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3873 {
3874 __be32 *p;
3875 int status = 0;
3876
3877 *res = 1024;
3878 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3879 return -EIO;
3880 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3881 uint64_t maxread;
3882 p = xdr_inline_decode(xdr, 8);
3883 if (unlikely(!p))
3884 goto out_overflow;
3885 xdr_decode_hyper(p, &maxread);
3886 if (maxread > 0x7FFFFFFF)
3887 maxread = 0x7FFFFFFF;
3888 *res = (uint32_t)maxread;
3889 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3890 }
3891 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3892 return status;
3893 out_overflow:
3894 print_overflow_msg(__func__, xdr);
3895 return -EIO;
3896 }
3897
3898 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3899 {
3900 __be32 *p;
3901 int status = 0;
3902
3903 *res = 1024;
3904 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3905 return -EIO;
3906 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3907 uint64_t maxwrite;
3908 p = xdr_inline_decode(xdr, 8);
3909 if (unlikely(!p))
3910 goto out_overflow;
3911 xdr_decode_hyper(p, &maxwrite);
3912 if (maxwrite > 0x7FFFFFFF)
3913 maxwrite = 0x7FFFFFFF;
3914 *res = (uint32_t)maxwrite;
3915 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3916 }
3917 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3918 return status;
3919 out_overflow:
3920 print_overflow_msg(__func__, xdr);
3921 return -EIO;
3922 }
3923
3924 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3925 {
3926 uint32_t tmp;
3927 __be32 *p;
3928 int ret = 0;
3929
3930 *mode = 0;
3931 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3932 return -EIO;
3933 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3934 p = xdr_inline_decode(xdr, 4);
3935 if (unlikely(!p))
3936 goto out_overflow;
3937 tmp = be32_to_cpup(p);
3938 *mode = tmp & ~S_IFMT;
3939 bitmap[1] &= ~FATTR4_WORD1_MODE;
3940 ret = NFS_ATTR_FATTR_MODE;
3941 }
3942 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3943 return ret;
3944 out_overflow:
3945 print_overflow_msg(__func__, xdr);
3946 return -EIO;
3947 }
3948
3949 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3950 {
3951 __be32 *p;
3952 int ret = 0;
3953
3954 *nlink = 1;
3955 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3956 return -EIO;
3957 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3958 p = xdr_inline_decode(xdr, 4);
3959 if (unlikely(!p))
3960 goto out_overflow;
3961 *nlink = be32_to_cpup(p);
3962 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3963 ret = NFS_ATTR_FATTR_NLINK;
3964 }
3965 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3966 return ret;
3967 out_overflow:
3968 print_overflow_msg(__func__, xdr);
3969 return -EIO;
3970 }
3971
3972 static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3973 struct nfs4_string *name, gfp_t gfp_flags)
3974 {
3975 ssize_t ret;
3976
3977 ret = xdr_stream_decode_string_dup(xdr, &name->data,
3978 XDR_MAX_NETOBJ, gfp_flags);
3979 name->len = 0;
3980 if (ret > 0)
3981 name->len = ret;
3982 return ret;
3983 }
3984
3985 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3986 const struct nfs_server *server, kuid_t *uid,
3987 struct nfs4_string *owner_name)
3988 {
3989 ssize_t len;
3990 char *p;
3991
3992 *uid = make_kuid(&init_user_ns, -2);
3993 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3994 return -EIO;
3995 if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3996 return 0;
3997 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3998
3999 if (owner_name != NULL) {
4000 len = decode_nfs4_string(xdr, owner_name, GFP_NOIO);
4001 if (len <= 0)
4002 goto out;
4003 dprintk("%s: name=%s\n", __func__, owner_name->data);
4004 return NFS_ATTR_FATTR_OWNER_NAME;
4005 } else {
4006 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
4007 XDR_MAX_NETOBJ);
4008 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
4009 goto out;
4010 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
4011 return NFS_ATTR_FATTR_OWNER;
4012 }
4013 out:
4014 if (len != -EBADMSG)
4015 return 0;
4016 print_overflow_msg(__func__, xdr);
4017 return -EIO;
4018 }
4019
4020 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
4021 const struct nfs_server *server, kgid_t *gid,
4022 struct nfs4_string *group_name)
4023 {
4024 ssize_t len;
4025 char *p;
4026
4027 *gid = make_kgid(&init_user_ns, -2);
4028 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
4029 return -EIO;
4030 if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
4031 return 0;
4032 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
4033
4034 if (group_name != NULL) {
4035 len = decode_nfs4_string(xdr, group_name, GFP_NOIO);
4036 if (len <= 0)
4037 goto out;
4038 dprintk("%s: name=%s\n", __func__, group_name->data);
4039 return NFS_ATTR_FATTR_GROUP_NAME;
4040 } else {
4041 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
4042 XDR_MAX_NETOBJ);
4043 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
4044 goto out;
4045 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
4046 return NFS_ATTR_FATTR_GROUP;
4047 }
4048 out:
4049 if (len != -EBADMSG)
4050 return 0;
4051 print_overflow_msg(__func__, xdr);
4052 return -EIO;
4053 }
4054
4055 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
4056 {
4057 uint32_t major = 0, minor = 0;
4058 __be32 *p;
4059 int ret = 0;
4060
4061 *rdev = MKDEV(0,0);
4062 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
4063 return -EIO;
4064 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
4065 dev_t tmp;
4066
4067 p = xdr_inline_decode(xdr, 8);
4068 if (unlikely(!p))
4069 goto out_overflow;
4070 major = be32_to_cpup(p++);
4071 minor = be32_to_cpup(p);
4072 tmp = MKDEV(major, minor);
4073 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
4074 *rdev = tmp;
4075 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
4076 ret = NFS_ATTR_FATTR_RDEV;
4077 }
4078 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
4079 return ret;
4080 out_overflow:
4081 print_overflow_msg(__func__, xdr);
4082 return -EIO;
4083 }
4084
4085 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4086 {
4087 __be32 *p;
4088 int status = 0;
4089
4090 *res = 0;
4091 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
4092 return -EIO;
4093 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4094 p = xdr_inline_decode(xdr, 8);
4095 if (unlikely(!p))
4096 goto out_overflow;
4097 xdr_decode_hyper(p, res);
4098 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4099 }
4100 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4101 return status;
4102 out_overflow:
4103 print_overflow_msg(__func__, xdr);
4104 return -EIO;
4105 }
4106
4107 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4108 {
4109 __be32 *p;
4110 int status = 0;
4111
4112 *res = 0;
4113 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4114 return -EIO;
4115 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4116 p = xdr_inline_decode(xdr, 8);
4117 if (unlikely(!p))
4118 goto out_overflow;
4119 xdr_decode_hyper(p, res);
4120 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4121 }
4122 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4123 return status;
4124 out_overflow:
4125 print_overflow_msg(__func__, xdr);
4126 return -EIO;
4127 }
4128
4129 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4130 {
4131 __be32 *p;
4132 int status = 0;
4133
4134 *res = 0;
4135 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4136 return -EIO;
4137 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4138 p = xdr_inline_decode(xdr, 8);
4139 if (unlikely(!p))
4140 goto out_overflow;
4141 xdr_decode_hyper(p, res);
4142 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4143 }
4144 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4145 return status;
4146 out_overflow:
4147 print_overflow_msg(__func__, xdr);
4148 return -EIO;
4149 }
4150
4151 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4152 {
4153 __be32 *p;
4154 int ret = 0;
4155
4156 *used = 0;
4157 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4158 return -EIO;
4159 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4160 p = xdr_inline_decode(xdr, 8);
4161 if (unlikely(!p))
4162 goto out_overflow;
4163 xdr_decode_hyper(p, used);
4164 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4165 ret = NFS_ATTR_FATTR_SPACE_USED;
4166 }
4167 dprintk("%s: space used=%Lu\n", __func__,
4168 (unsigned long long)*used);
4169 return ret;
4170 out_overflow:
4171 print_overflow_msg(__func__, xdr);
4172 return -EIO;
4173 }
4174
4175 static __be32 *
4176 xdr_decode_nfstime4(__be32 *p, struct timespec *t)
4177 {
4178 __u64 sec;
4179
4180 p = xdr_decode_hyper(p, &sec);
4181 t-> tv_sec = (time_t)sec;
4182 t->tv_nsec = be32_to_cpup(p++);
4183 return p;
4184 }
4185
4186 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4187 {
4188 __be32 *p;
4189
4190 p = xdr_inline_decode(xdr, nfstime4_maxsz << 2);
4191 if (unlikely(!p))
4192 goto out_overflow;
4193 xdr_decode_nfstime4(p, time);
4194 return 0;
4195 out_overflow:
4196 print_overflow_msg(__func__, xdr);
4197 return -EIO;
4198 }
4199
4200 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4201 {
4202 int status = 0;
4203
4204 time->tv_sec = 0;
4205 time->tv_nsec = 0;
4206 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4207 return -EIO;
4208 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4209 status = decode_attr_time(xdr, time);
4210 if (status == 0)
4211 status = NFS_ATTR_FATTR_ATIME;
4212 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4213 }
4214 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4215 return status;
4216 }
4217
4218 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4219 {
4220 int status = 0;
4221
4222 time->tv_sec = 0;
4223 time->tv_nsec = 0;
4224 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4225 return -EIO;
4226 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4227 status = decode_attr_time(xdr, time);
4228 if (status == 0)
4229 status = NFS_ATTR_FATTR_CTIME;
4230 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4231 }
4232 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4233 return status;
4234 }
4235
4236 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4237 struct timespec *time)
4238 {
4239 int status = 0;
4240
4241 time->tv_sec = 0;
4242 time->tv_nsec = 0;
4243 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4244 return -EIO;
4245 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4246 status = decode_attr_time(xdr, time);
4247 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4248 }
4249 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4250 (long)time->tv_nsec);
4251 return status;
4252 }
4253
4254 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4255 struct nfs4_label *label)
4256 {
4257 uint32_t pi = 0;
4258 uint32_t lfs = 0;
4259 __u32 len;
4260 __be32 *p;
4261 int status = 0;
4262
4263 if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4264 return -EIO;
4265 if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4266 p = xdr_inline_decode(xdr, 4);
4267 if (unlikely(!p))
4268 goto out_overflow;
4269 lfs = be32_to_cpup(p++);
4270 p = xdr_inline_decode(xdr, 4);
4271 if (unlikely(!p))
4272 goto out_overflow;
4273 pi = be32_to_cpup(p++);
4274 p = xdr_inline_decode(xdr, 4);
4275 if (unlikely(!p))
4276 goto out_overflow;
4277 len = be32_to_cpup(p++);
4278 p = xdr_inline_decode(xdr, len);
4279 if (unlikely(!p))
4280 goto out_overflow;
4281 if (len < NFS4_MAXLABELLEN) {
4282 if (label) {
4283 memcpy(label->label, p, len);
4284 label->len = len;
4285 label->pi = pi;
4286 label->lfs = lfs;
4287 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4288 }
4289 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4290 } else
4291 printk(KERN_WARNING "%s: label too long (%u)!\n",
4292 __func__, len);
4293 }
4294 if (label && label->label)
4295 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4296 (char *)label->label, label->len, label->pi, label->lfs);
4297 return status;
4298
4299 out_overflow:
4300 print_overflow_msg(__func__, xdr);
4301 return -EIO;
4302 }
4303
4304 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4305 {
4306 int status = 0;
4307
4308 time->tv_sec = 0;
4309 time->tv_nsec = 0;
4310 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4311 return -EIO;
4312 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4313 status = decode_attr_time(xdr, time);
4314 if (status == 0)
4315 status = NFS_ATTR_FATTR_MTIME;
4316 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4317 }
4318 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4319 return status;
4320 }
4321
4322 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4323 {
4324 unsigned int attrwords = XDR_QUADLEN(attrlen);
4325 unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4326
4327 if (unlikely(attrwords != nwords)) {
4328 dprintk("%s: server returned incorrect attribute length: "
4329 "%u %c %u\n",
4330 __func__,
4331 attrwords << 2,
4332 (attrwords < nwords) ? '<' : '>',
4333 nwords << 2);
4334 return -EIO;
4335 }
4336 return 0;
4337 }
4338
4339 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4340 {
4341 __be32 *p;
4342
4343 p = xdr_inline_decode(xdr, 20);
4344 if (unlikely(!p))
4345 goto out_overflow;
4346 cinfo->atomic = be32_to_cpup(p++);
4347 p = xdr_decode_hyper(p, &cinfo->before);
4348 xdr_decode_hyper(p, &cinfo->after);
4349 return 0;
4350 out_overflow:
4351 print_overflow_msg(__func__, xdr);
4352 return -EIO;
4353 }
4354
4355 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4356 {
4357 __be32 *p;
4358 uint32_t supp, acc;
4359 int status;
4360
4361 status = decode_op_hdr(xdr, OP_ACCESS);
4362 if (status)
4363 return status;
4364 p = xdr_inline_decode(xdr, 8);
4365 if (unlikely(!p))
4366 goto out_overflow;
4367 supp = be32_to_cpup(p++);
4368 acc = be32_to_cpup(p);
4369 *supported = supp;
4370 *access = acc;
4371 return 0;
4372 out_overflow:
4373 print_overflow_msg(__func__, xdr);
4374 return -EIO;
4375 }
4376
4377 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4378 {
4379 ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4380 if (unlikely(ret < 0)) {
4381 print_overflow_msg(__func__, xdr);
4382 return -EIO;
4383 }
4384 return 0;
4385 }
4386
4387 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4388 {
4389 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4390 }
4391
4392 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4393 {
4394 stateid->type = NFS4_OPEN_STATEID_TYPE;
4395 return decode_stateid(xdr, stateid);
4396 }
4397
4398 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4399 {
4400 stateid->type = NFS4_LOCK_STATEID_TYPE;
4401 return decode_stateid(xdr, stateid);
4402 }
4403
4404 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4405 {
4406 stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4407 return decode_stateid(xdr, stateid);
4408 }
4409
4410 static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4411 {
4412 nfs4_stateid dummy;
4413
4414 nfs4_stateid_copy(stateid, &invalid_stateid);
4415 return decode_stateid(xdr, &dummy);
4416 }
4417
4418 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4419 {
4420 int status;
4421
4422 status = decode_op_hdr(xdr, OP_CLOSE);
4423 if (status != -EIO)
4424 nfs_increment_open_seqid(status, res->seqid);
4425 if (!status)
4426 status = decode_invalid_stateid(xdr, &res->stateid);
4427 return status;
4428 }
4429
4430 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4431 {
4432 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4433 }
4434
4435 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4436 {
4437 return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4438 }
4439
4440 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4441 {
4442 int status;
4443
4444 status = decode_op_hdr(xdr, OP_COMMIT);
4445 if (!status)
4446 status = decode_write_verifier(xdr, &res->verf->verifier);
4447 return status;
4448 }
4449
4450 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4451 {
4452 __be32 *p;
4453 uint32_t bmlen;
4454 int status;
4455
4456 status = decode_op_hdr(xdr, OP_CREATE);
4457 if (status)
4458 return status;
4459 if ((status = decode_change_info(xdr, cinfo)))
4460 return status;
4461 p = xdr_inline_decode(xdr, 4);
4462 if (unlikely(!p))
4463 goto out_overflow;
4464 bmlen = be32_to_cpup(p);
4465 p = xdr_inline_decode(xdr, bmlen << 2);
4466 if (likely(p))
4467 return 0;
4468 out_overflow:
4469 print_overflow_msg(__func__, xdr);
4470 return -EIO;
4471 }
4472
4473 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4474 {
4475 unsigned int savep;
4476 uint32_t attrlen, bitmap[3] = {0};
4477 int status;
4478
4479 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4480 goto xdr_error;
4481 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4482 goto xdr_error;
4483 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4484 goto xdr_error;
4485 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4486 goto xdr_error;
4487 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4488 &res->fh_expire_type)) != 0)
4489 goto xdr_error;
4490 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4491 goto xdr_error;
4492 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4493 goto xdr_error;
4494 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4495 goto xdr_error;
4496 if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4497 res->exclcreat_bitmask)) != 0)
4498 goto xdr_error;
4499 status = verify_attr_len(xdr, savep, attrlen);
4500 xdr_error:
4501 dprintk("%s: xdr returned %d!\n", __func__, -status);
4502 return status;
4503 }
4504
4505 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4506 {
4507 unsigned int savep;
4508 uint32_t attrlen, bitmap[3] = {0};
4509 int status;
4510
4511 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4512 goto xdr_error;
4513 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4514 goto xdr_error;
4515 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4516 goto xdr_error;
4517
4518 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4519 goto xdr_error;
4520 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4521 goto xdr_error;
4522 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4523 goto xdr_error;
4524
4525 status = -EIO;
4526 if (unlikely(bitmap[0]))
4527 goto xdr_error;
4528
4529 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4530 goto xdr_error;
4531 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4532 goto xdr_error;
4533 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4534 goto xdr_error;
4535
4536 status = verify_attr_len(xdr, savep, attrlen);
4537 xdr_error:
4538 dprintk("%s: xdr returned %d!\n", __func__, -status);
4539 return status;
4540 }
4541
4542 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4543 {
4544 unsigned int savep;
4545 uint32_t attrlen, bitmap[3] = {0};
4546 int status;
4547
4548 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4549 goto xdr_error;
4550 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4551 goto xdr_error;
4552 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4553 goto xdr_error;
4554
4555 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4556 goto xdr_error;
4557 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4558 goto xdr_error;
4559
4560 status = verify_attr_len(xdr, savep, attrlen);
4561 xdr_error:
4562 dprintk("%s: xdr returned %d!\n", __func__, -status);
4563 return status;
4564 }
4565
4566 static int decode_threshold_hint(struct xdr_stream *xdr,
4567 uint32_t *bitmap,
4568 uint64_t *res,
4569 uint32_t hint_bit)
4570 {
4571 __be32 *p;
4572
4573 *res = 0;
4574 if (likely(bitmap[0] & hint_bit)) {
4575 p = xdr_inline_decode(xdr, 8);
4576 if (unlikely(!p))
4577 goto out_overflow;
4578 xdr_decode_hyper(p, res);
4579 }
4580 return 0;
4581 out_overflow:
4582 print_overflow_msg(__func__, xdr);
4583 return -EIO;
4584 }
4585
4586 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4587 struct nfs4_threshold *res)
4588 {
4589 __be32 *p;
4590 unsigned int savep;
4591 uint32_t bitmap[3] = {0,}, attrlen;
4592 int status;
4593
4594 /* layout type */
4595 p = xdr_inline_decode(xdr, 4);
4596 if (unlikely(!p)) {
4597 print_overflow_msg(__func__, xdr);
4598 return -EIO;
4599 }
4600 res->l_type = be32_to_cpup(p);
4601
4602 /* thi_hintset bitmap */
4603 status = decode_attr_bitmap(xdr, bitmap);
4604 if (status < 0)
4605 goto xdr_error;
4606
4607 /* thi_hintlist length */
4608 status = decode_attr_length(xdr, &attrlen, &savep);
4609 if (status < 0)
4610 goto xdr_error;
4611 /* thi_hintlist */
4612 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4613 if (status < 0)
4614 goto xdr_error;
4615 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4616 if (status < 0)
4617 goto xdr_error;
4618 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4619 THRESHOLD_RD_IO);
4620 if (status < 0)
4621 goto xdr_error;
4622 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4623 THRESHOLD_WR_IO);
4624 if (status < 0)
4625 goto xdr_error;
4626
4627 status = verify_attr_len(xdr, savep, attrlen);
4628 res->bm = bitmap[0];
4629
4630 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4631 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4632 res->wr_io_sz);
4633 xdr_error:
4634 dprintk("%s ret=%d!\n", __func__, status);
4635 return status;
4636 }
4637
4638 /*
4639 * Thresholds on pNFS direct I/O vrs MDS I/O
4640 */
4641 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4642 uint32_t *bitmap,
4643 struct nfs4_threshold *res)
4644 {
4645 __be32 *p;
4646 int status = 0;
4647 uint32_t num;
4648
4649 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4650 return -EIO;
4651 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4652 /* Did the server return an unrequested attribute? */
4653 if (unlikely(res == NULL))
4654 return -EREMOTEIO;
4655 p = xdr_inline_decode(xdr, 4);
4656 if (unlikely(!p))
4657 goto out_overflow;
4658 num = be32_to_cpup(p);
4659 if (num == 0)
4660 return 0;
4661 if (num > 1)
4662 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4663 "drivers per filesystem not supported\n",
4664 __func__);
4665
4666 status = decode_first_threshold_item4(xdr, res);
4667 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4668 }
4669 return status;
4670 out_overflow:
4671 print_overflow_msg(__func__, xdr);
4672 return -EIO;
4673 }
4674
4675 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4676 struct nfs_fattr *fattr, struct nfs_fh *fh,
4677 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4678 const struct nfs_server *server)
4679 {
4680 int status;
4681 umode_t fmode = 0;
4682 uint32_t type;
4683 int32_t err;
4684
4685 status = decode_attr_type(xdr, bitmap, &type);
4686 if (status < 0)
4687 goto xdr_error;
4688 fattr->mode = 0;
4689 if (status != 0) {
4690 fattr->mode |= nfs_type2fmt[type];
4691 fattr->valid |= status;
4692 }
4693
4694 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4695 if (status < 0)
4696 goto xdr_error;
4697 fattr->valid |= status;
4698
4699 status = decode_attr_size(xdr, bitmap, &fattr->size);
4700 if (status < 0)
4701 goto xdr_error;
4702 fattr->valid |= status;
4703
4704 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4705 if (status < 0)
4706 goto xdr_error;
4707 fattr->valid |= status;
4708
4709 err = 0;
4710 status = decode_attr_error(xdr, bitmap, &err);
4711 if (status < 0)
4712 goto xdr_error;
4713
4714 status = decode_attr_filehandle(xdr, bitmap, fh);
4715 if (status < 0)
4716 goto xdr_error;
4717
4718 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4719 if (status < 0)
4720 goto xdr_error;
4721 fattr->valid |= status;
4722
4723 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4724 if (status < 0)
4725 goto xdr_error;
4726 fattr->valid |= status;
4727
4728 status = -EIO;
4729 if (unlikely(bitmap[0]))
4730 goto xdr_error;
4731
4732 status = decode_attr_mode(xdr, bitmap, &fmode);
4733 if (status < 0)
4734 goto xdr_error;
4735 if (status != 0) {
4736 fattr->mode |= fmode;
4737 fattr->valid |= status;
4738 }
4739
4740 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4741 if (status < 0)
4742 goto xdr_error;
4743 fattr->valid |= status;
4744
4745 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4746 if (status < 0)
4747 goto xdr_error;
4748 fattr->valid |= status;
4749
4750 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4751 if (status < 0)
4752 goto xdr_error;
4753 fattr->valid |= status;
4754
4755 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4756 if (status < 0)
4757 goto xdr_error;
4758 fattr->valid |= status;
4759
4760 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4761 if (status < 0)
4762 goto xdr_error;
4763 fattr->valid |= status;
4764
4765 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4766 if (status < 0)
4767 goto xdr_error;
4768 fattr->valid |= status;
4769
4770 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4771 if (status < 0)
4772 goto xdr_error;
4773 fattr->valid |= status;
4774
4775 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4776 if (status < 0)
4777 goto xdr_error;
4778 fattr->valid |= status;
4779
4780 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4781 if (status < 0)
4782 goto xdr_error;
4783 fattr->valid |= status;
4784
4785 status = -EIO;
4786 if (unlikely(bitmap[1]))
4787 goto xdr_error;
4788
4789 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4790 if (status < 0)
4791 goto xdr_error;
4792
4793 if (label) {
4794 status = decode_attr_security_label(xdr, bitmap, label);
4795 if (status < 0)
4796 goto xdr_error;
4797 fattr->valid |= status;
4798 }
4799
4800 xdr_error:
4801 dprintk("%s: xdr returned %d\n", __func__, -status);
4802 return status;
4803 }
4804
4805 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4806 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4807 struct nfs4_label *label, const struct nfs_server *server)
4808 {
4809 unsigned int savep;
4810 uint32_t attrlen,
4811 bitmap[3] = {0};
4812 int status;
4813
4814 status = decode_op_hdr(xdr, OP_GETATTR);
4815 if (status < 0)
4816 goto xdr_error;
4817
4818 status = decode_attr_bitmap(xdr, bitmap);
4819 if (status < 0)
4820 goto xdr_error;
4821
4822 status = decode_attr_length(xdr, &attrlen, &savep);
4823 if (status < 0)
4824 goto xdr_error;
4825
4826 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4827 label, server);
4828 if (status < 0)
4829 goto xdr_error;
4830
4831 status = verify_attr_len(xdr, savep, attrlen);
4832 xdr_error:
4833 dprintk("%s: xdr returned %d\n", __func__, -status);
4834 return status;
4835 }
4836
4837 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4838 struct nfs4_label *label, const struct nfs_server *server)
4839 {
4840 return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4841 }
4842
4843 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4844 const struct nfs_server *server)
4845 {
4846 return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4847 }
4848
4849 /*
4850 * Decode potentially multiple layout types.
4851 */
4852 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4853 struct nfs_fsinfo *fsinfo)
4854 {
4855 __be32 *p;
4856 uint32_t i;
4857
4858 p = xdr_inline_decode(xdr, 4);
4859 if (unlikely(!p))
4860 goto out_overflow;
4861 fsinfo->nlayouttypes = be32_to_cpup(p);
4862
4863 /* pNFS is not supported by the underlying file system */
4864 if (fsinfo->nlayouttypes == 0)
4865 return 0;
4866
4867 /* Decode and set first layout type, move xdr->p past unused types */
4868 p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4869 if (unlikely(!p))
4870 goto out_overflow;
4871
4872 /* If we get too many, then just cap it at the max */
4873 if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4874 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4875 __func__, fsinfo->nlayouttypes);
4876 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4877 }
4878
4879 for(i = 0; i < fsinfo->nlayouttypes; ++i)
4880 fsinfo->layouttype[i] = be32_to_cpup(p++);
4881 return 0;
4882 out_overflow:
4883 print_overflow_msg(__func__, xdr);
4884 return -EIO;
4885 }
4886
4887 /*
4888 * The type of file system exported.
4889 * Note we must ensure that layouttype is set in any non-error case.
4890 */
4891 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4892 struct nfs_fsinfo *fsinfo)
4893 {
4894 int status = 0;
4895
4896 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4897 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4898 return -EIO;
4899 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4900 status = decode_pnfs_layout_types(xdr, fsinfo);
4901 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4902 }
4903 return status;
4904 }
4905
4906 /*
4907 * The prefered block size for layout directed io
4908 */
4909 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4910 uint32_t *res)
4911 {
4912 __be32 *p;
4913
4914 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4915 *res = 0;
4916 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4917 p = xdr_inline_decode(xdr, 4);
4918 if (unlikely(!p)) {
4919 print_overflow_msg(__func__, xdr);
4920 return -EIO;
4921 }
4922 *res = be32_to_cpup(p);
4923 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4924 }
4925 return 0;
4926 }
4927
4928 /*
4929 * The granularity of a CLONE operation.
4930 */
4931 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4932 uint32_t *res)
4933 {
4934 __be32 *p;
4935
4936 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4937 *res = 0;
4938 if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4939 p = xdr_inline_decode(xdr, 4);
4940 if (unlikely(!p)) {
4941 print_overflow_msg(__func__, xdr);
4942 return -EIO;
4943 }
4944 *res = be32_to_cpup(p);
4945 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4946 }
4947 return 0;
4948 }
4949
4950 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4951 {
4952 unsigned int savep;
4953 uint32_t attrlen, bitmap[3];
4954 int status;
4955
4956 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4957 goto xdr_error;
4958 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4959 goto xdr_error;
4960 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4961 goto xdr_error;
4962
4963 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4964
4965 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4966 goto xdr_error;
4967 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4968 goto xdr_error;
4969 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4970 goto xdr_error;
4971 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4972 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4973 goto xdr_error;
4974 fsinfo->wtpref = fsinfo->wtmax;
4975
4976 status = -EIO;
4977 if (unlikely(bitmap[0]))
4978 goto xdr_error;
4979
4980 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4981 if (status != 0)
4982 goto xdr_error;
4983 status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4984 if (status != 0)
4985 goto xdr_error;
4986
4987 status = -EIO;
4988 if (unlikely(bitmap[1]))
4989 goto xdr_error;
4990
4991 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4992 if (status)
4993 goto xdr_error;
4994 status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4995 if (status)
4996 goto xdr_error;
4997
4998 status = verify_attr_len(xdr, savep, attrlen);
4999 xdr_error:
5000 dprintk("%s: xdr returned %d!\n", __func__, -status);
5001 return status;
5002 }
5003
5004 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
5005 {
5006 __be32 *p;
5007 uint32_t len;
5008 int status;
5009
5010 /* Zero handle first to allow comparisons */
5011 memset(fh, 0, sizeof(*fh));
5012
5013 status = decode_op_hdr(xdr, OP_GETFH);
5014 if (status)
5015 return status;
5016
5017 p = xdr_inline_decode(xdr, 4);
5018 if (unlikely(!p))
5019 goto out_overflow;
5020 len = be32_to_cpup(p);
5021 if (len > NFS4_FHSIZE)
5022 return -EIO;
5023 fh->size = len;
5024 p = xdr_inline_decode(xdr, len);
5025 if (unlikely(!p))
5026 goto out_overflow;
5027 memcpy(fh->data, p, len);
5028 return 0;
5029 out_overflow:
5030 print_overflow_msg(__func__, xdr);
5031 return -EIO;
5032 }
5033
5034 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5035 {
5036 int status;
5037
5038 status = decode_op_hdr(xdr, OP_LINK);
5039 if (status)
5040 return status;
5041 return decode_change_info(xdr, cinfo);
5042 }
5043
5044 /*
5045 * We create the owner, so we know a proper owner.id length is 4.
5046 */
5047 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
5048 {
5049 uint64_t offset, length, clientid;
5050 __be32 *p;
5051 uint32_t namelen, type;
5052
5053 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
5054 if (unlikely(!p))
5055 goto out_overflow;
5056 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
5057 p = xdr_decode_hyper(p, &length);
5058 type = be32_to_cpup(p++); /* 4 byte read */
5059 if (fl != NULL) { /* manipulate file lock */
5060 fl->fl_start = (loff_t)offset;
5061 fl->fl_end = fl->fl_start + (loff_t)length - 1;
5062 if (length == ~(uint64_t)0)
5063 fl->fl_end = OFFSET_MAX;
5064 fl->fl_type = F_WRLCK;
5065 if (type & 1)
5066 fl->fl_type = F_RDLCK;
5067 fl->fl_pid = 0;
5068 }
5069 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
5070 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
5071 p = xdr_inline_decode(xdr, namelen); /* variable size field */
5072 if (likely(p))
5073 return -NFS4ERR_DENIED;
5074 out_overflow:
5075 print_overflow_msg(__func__, xdr);
5076 return -EIO;
5077 }
5078
5079 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
5080 {
5081 int status;
5082
5083 status = decode_op_hdr(xdr, OP_LOCK);
5084 if (status == -EIO)
5085 goto out;
5086 if (status == 0) {
5087 status = decode_lock_stateid(xdr, &res->stateid);
5088 if (unlikely(status))
5089 goto out;
5090 } else if (status == -NFS4ERR_DENIED)
5091 status = decode_lock_denied(xdr, NULL);
5092 if (res->open_seqid != NULL)
5093 nfs_increment_open_seqid(status, res->open_seqid);
5094 nfs_increment_lock_seqid(status, res->lock_seqid);
5095 out:
5096 return status;
5097 }
5098
5099 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
5100 {
5101 int status;
5102 status = decode_op_hdr(xdr, OP_LOCKT);
5103 if (status == -NFS4ERR_DENIED)
5104 return decode_lock_denied(xdr, res->denied);
5105 return status;
5106 }
5107
5108 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
5109 {
5110 int status;
5111
5112 status = decode_op_hdr(xdr, OP_LOCKU);
5113 if (status != -EIO)
5114 nfs_increment_lock_seqid(status, res->seqid);
5115 if (status == 0)
5116 status = decode_lock_stateid(xdr, &res->stateid);
5117 return status;
5118 }
5119
5120 static int decode_release_lockowner(struct xdr_stream *xdr)
5121 {
5122 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5123 }
5124
5125 static int decode_lookup(struct xdr_stream *xdr)
5126 {
5127 return decode_op_hdr(xdr, OP_LOOKUP);
5128 }
5129
5130 static int decode_lookupp(struct xdr_stream *xdr)
5131 {
5132 return decode_op_hdr(xdr, OP_LOOKUPP);
5133 }
5134
5135 /* This is too sick! */
5136 static int decode_space_limit(struct xdr_stream *xdr,
5137 unsigned long *pagemod_limit)
5138 {
5139 __be32 *p;
5140 uint32_t limit_type, nblocks, blocksize;
5141 u64 maxsize = 0;
5142
5143 p = xdr_inline_decode(xdr, 12);
5144 if (unlikely(!p))
5145 goto out_overflow;
5146 limit_type = be32_to_cpup(p++);
5147 switch (limit_type) {
5148 case NFS4_LIMIT_SIZE:
5149 xdr_decode_hyper(p, &maxsize);
5150 break;
5151 case NFS4_LIMIT_BLOCKS:
5152 nblocks = be32_to_cpup(p++);
5153 blocksize = be32_to_cpup(p);
5154 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5155 }
5156 maxsize >>= PAGE_SHIFT;
5157 *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5158 return 0;
5159 out_overflow:
5160 print_overflow_msg(__func__, xdr);
5161 return -EIO;
5162 }
5163
5164 static int decode_rw_delegation(struct xdr_stream *xdr,
5165 uint32_t delegation_type,
5166 struct nfs_openres *res)
5167 {
5168 __be32 *p;
5169 int status;
5170
5171 status = decode_delegation_stateid(xdr, &res->delegation);
5172 if (unlikely(status))
5173 return status;
5174 p = xdr_inline_decode(xdr, 4);
5175 if (unlikely(!p))
5176 goto out_overflow;
5177 res->do_recall = be32_to_cpup(p);
5178
5179 switch (delegation_type) {
5180 case NFS4_OPEN_DELEGATE_READ:
5181 res->delegation_type = FMODE_READ;
5182 break;
5183 case NFS4_OPEN_DELEGATE_WRITE:
5184 res->delegation_type = FMODE_WRITE|FMODE_READ;
5185 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5186 return -EIO;
5187 }
5188 return decode_ace(xdr, NULL);
5189 out_overflow:
5190 print_overflow_msg(__func__, xdr);
5191 return -EIO;
5192 }
5193
5194 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5195 {
5196 __be32 *p;
5197 uint32_t why_no_delegation;
5198
5199 p = xdr_inline_decode(xdr, 4);
5200 if (unlikely(!p))
5201 goto out_overflow;
5202 why_no_delegation = be32_to_cpup(p);
5203 switch (why_no_delegation) {
5204 case WND4_CONTENTION:
5205 case WND4_RESOURCE:
5206 xdr_inline_decode(xdr, 4);
5207 /* Ignore for now */
5208 }
5209 return 0;
5210 out_overflow:
5211 print_overflow_msg(__func__, xdr);
5212 return -EIO;
5213 }
5214
5215 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5216 {
5217 __be32 *p;
5218 uint32_t delegation_type;
5219
5220 p = xdr_inline_decode(xdr, 4);
5221 if (unlikely(!p))
5222 goto out_overflow;
5223 delegation_type = be32_to_cpup(p);
5224 res->delegation_type = 0;
5225 switch (delegation_type) {
5226 case NFS4_OPEN_DELEGATE_NONE:
5227 return 0;
5228 case NFS4_OPEN_DELEGATE_READ:
5229 case NFS4_OPEN_DELEGATE_WRITE:
5230 return decode_rw_delegation(xdr, delegation_type, res);
5231 case NFS4_OPEN_DELEGATE_NONE_EXT:
5232 return decode_no_delegation(xdr, res);
5233 }
5234 return -EIO;
5235 out_overflow:
5236 print_overflow_msg(__func__, xdr);
5237 return -EIO;
5238 }
5239
5240 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5241 {
5242 __be32 *p;
5243 uint32_t savewords, bmlen, i;
5244 int status;
5245
5246 if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5247 return status;
5248 nfs_increment_open_seqid(status, res->seqid);
5249 if (status)
5250 return status;
5251 status = decode_open_stateid(xdr, &res->stateid);
5252 if (unlikely(status))
5253 return status;
5254
5255 decode_change_info(xdr, &res->cinfo);
5256
5257 p = xdr_inline_decode(xdr, 8);
5258 if (unlikely(!p))
5259 goto out_overflow;
5260 res->rflags = be32_to_cpup(p++);
5261 bmlen = be32_to_cpup(p);
5262 if (bmlen > 10)
5263 goto xdr_error;
5264
5265 p = xdr_inline_decode(xdr, bmlen << 2);
5266 if (unlikely(!p))
5267 goto out_overflow;
5268 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5269 for (i = 0; i < savewords; ++i)
5270 res->attrset[i] = be32_to_cpup(p++);
5271 for (; i < NFS4_BITMAP_SIZE; i++)
5272 res->attrset[i] = 0;
5273
5274 return decode_delegation(xdr, res);
5275 xdr_error:
5276 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5277 return -EIO;
5278 out_overflow:
5279 print_overflow_msg(__func__, xdr);
5280 return -EIO;
5281 }
5282
5283 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5284 {
5285 int status;
5286
5287 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5288 if (status != -EIO)
5289 nfs_increment_open_seqid(status, res->seqid);
5290 if (!status)
5291 status = decode_open_stateid(xdr, &res->stateid);
5292 return status;
5293 }
5294
5295 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5296 {
5297 int status;
5298
5299 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5300 if (status != -EIO)
5301 nfs_increment_open_seqid(status, res->seqid);
5302 if (!status)
5303 status = decode_open_stateid(xdr, &res->stateid);
5304 return status;
5305 }
5306
5307 static int decode_putfh(struct xdr_stream *xdr)
5308 {
5309 return decode_op_hdr(xdr, OP_PUTFH);
5310 }
5311
5312 static int decode_putrootfh(struct xdr_stream *xdr)
5313 {
5314 return decode_op_hdr(xdr, OP_PUTROOTFH);
5315 }
5316
5317 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5318 struct nfs_pgio_res *res)
5319 {
5320 __be32 *p;
5321 uint32_t count, eof, recvd;
5322 int status;
5323
5324 status = decode_op_hdr(xdr, OP_READ);
5325 if (status)
5326 return status;
5327 p = xdr_inline_decode(xdr, 8);
5328 if (unlikely(!p))
5329 goto out_overflow;
5330 eof = be32_to_cpup(p++);
5331 count = be32_to_cpup(p);
5332 recvd = xdr_read_pages(xdr, count);
5333 if (count > recvd) {
5334 dprintk("NFS: server cheating in read reply: "
5335 "count %u > recvd %u\n", count, recvd);
5336 count = recvd;
5337 eof = 0;
5338 }
5339 res->eof = eof;
5340 res->count = count;
5341 return 0;
5342 out_overflow:
5343 print_overflow_msg(__func__, xdr);
5344 return -EIO;
5345 }
5346
5347 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5348 {
5349 int status;
5350 __be32 verf[2];
5351
5352 status = decode_op_hdr(xdr, OP_READDIR);
5353 if (!status)
5354 status = decode_verifier(xdr, readdir->verifier.data);
5355 if (unlikely(status))
5356 return status;
5357 memcpy(verf, readdir->verifier.data, sizeof(verf));
5358 dprintk("%s: verifier = %08x:%08x\n",
5359 __func__, verf[0], verf[1]);
5360 return xdr_read_pages(xdr, xdr->buf->page_len);
5361 }
5362
5363 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5364 {
5365 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5366 u32 len, recvd;
5367 __be32 *p;
5368 int status;
5369
5370 status = decode_op_hdr(xdr, OP_READLINK);
5371 if (status)
5372 return status;
5373
5374 /* Convert length of symlink */
5375 p = xdr_inline_decode(xdr, 4);
5376 if (unlikely(!p))
5377 goto out_overflow;
5378 len = be32_to_cpup(p);
5379 if (len >= rcvbuf->page_len || len <= 0) {
5380 dprintk("nfs: server returned giant symlink!\n");
5381 return -ENAMETOOLONG;
5382 }
5383 recvd = xdr_read_pages(xdr, len);
5384 if (recvd < len) {
5385 dprintk("NFS: server cheating in readlink reply: "
5386 "count %u > recvd %u\n", len, recvd);
5387 return -EIO;
5388 }
5389 /*
5390 * The XDR encode routine has set things up so that
5391 * the link text will be copied directly into the
5392 * buffer. We just have to do overflow-checking,
5393 * and and null-terminate the text (the VFS expects
5394 * null-termination).
5395 */
5396 xdr_terminate_string(rcvbuf, len);
5397 return 0;
5398 out_overflow:
5399 print_overflow_msg(__func__, xdr);
5400 return -EIO;
5401 }
5402
5403 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5404 {
5405 int status;
5406
5407 status = decode_op_hdr(xdr, OP_REMOVE);
5408 if (status)
5409 goto out;
5410 status = decode_change_info(xdr, cinfo);
5411 out:
5412 return status;
5413 }
5414
5415 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5416 struct nfs4_change_info *new_cinfo)
5417 {
5418 int status;
5419
5420 status = decode_op_hdr(xdr, OP_RENAME);
5421 if (status)
5422 goto out;
5423 if ((status = decode_change_info(xdr, old_cinfo)))
5424 goto out;
5425 status = decode_change_info(xdr, new_cinfo);
5426 out:
5427 return status;
5428 }
5429
5430 static int decode_renew(struct xdr_stream *xdr)
5431 {
5432 return decode_op_hdr(xdr, OP_RENEW);
5433 }
5434
5435 static int
5436 decode_restorefh(struct xdr_stream *xdr)
5437 {
5438 return decode_op_hdr(xdr, OP_RESTOREFH);
5439 }
5440
5441 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5442 struct nfs_getaclres *res)
5443 {
5444 unsigned int savep;
5445 uint32_t attrlen,
5446 bitmap[3] = {0};
5447 int status;
5448 unsigned int pg_offset;
5449
5450 res->acl_len = 0;
5451 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5452 goto out;
5453
5454 xdr_enter_page(xdr, xdr->buf->page_len);
5455
5456 /* Calculate the offset of the page data */
5457 pg_offset = xdr->buf->head[0].iov_len;
5458
5459 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5460 goto out;
5461 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5462 goto out;
5463
5464 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5465 return -EIO;
5466 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5467
5468 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5469 * are stored with the acl data to handle the problem of
5470 * variable length bitmaps.*/
5471 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5472 res->acl_len = attrlen;
5473
5474 /* Check for receive buffer overflow */
5475 if (res->acl_len > (xdr->nwords << 2) ||
5476 res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5477 res->acl_flags |= NFS4_ACL_TRUNC;
5478 dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5479 attrlen, xdr->nwords << 2);
5480 }
5481 } else
5482 status = -EOPNOTSUPP;
5483
5484 out:
5485 return status;
5486 }
5487
5488 static int
5489 decode_savefh(struct xdr_stream *xdr)
5490 {
5491 return decode_op_hdr(xdr, OP_SAVEFH);
5492 }
5493
5494 static int decode_setattr(struct xdr_stream *xdr)
5495 {
5496 int status;
5497
5498 status = decode_op_hdr(xdr, OP_SETATTR);
5499 if (status)
5500 return status;
5501 if (decode_bitmap4(xdr, NULL, 0) >= 0)
5502 return 0;
5503 print_overflow_msg(__func__, xdr);
5504 return -EIO;
5505 }
5506
5507 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5508 {
5509 __be32 *p;
5510 uint32_t opnum;
5511 int32_t nfserr;
5512
5513 p = xdr_inline_decode(xdr, 8);
5514 if (unlikely(!p))
5515 goto out_overflow;
5516 opnum = be32_to_cpup(p++);
5517 if (opnum != OP_SETCLIENTID) {
5518 dprintk("nfs: decode_setclientid: Server returned operation"
5519 " %d\n", opnum);
5520 return -EIO;
5521 }
5522 nfserr = be32_to_cpup(p);
5523 if (nfserr == NFS_OK) {
5524 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5525 if (unlikely(!p))
5526 goto out_overflow;
5527 p = xdr_decode_hyper(p, &res->clientid);
5528 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5529 } else if (nfserr == NFSERR_CLID_INUSE) {
5530 uint32_t len;
5531
5532 /* skip netid string */
5533 p = xdr_inline_decode(xdr, 4);
5534 if (unlikely(!p))
5535 goto out_overflow;
5536 len = be32_to_cpup(p);
5537 p = xdr_inline_decode(xdr, len);
5538 if (unlikely(!p))
5539 goto out_overflow;
5540
5541 /* skip uaddr string */
5542 p = xdr_inline_decode(xdr, 4);
5543 if (unlikely(!p))
5544 goto out_overflow;
5545 len = be32_to_cpup(p);
5546 p = xdr_inline_decode(xdr, len);
5547 if (unlikely(!p))
5548 goto out_overflow;
5549 return -NFSERR_CLID_INUSE;
5550 } else
5551 return nfs4_stat_to_errno(nfserr);
5552
5553 return 0;
5554 out_overflow:
5555 print_overflow_msg(__func__, xdr);
5556 return -EIO;
5557 }
5558
5559 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5560 {
5561 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5562 }
5563
5564 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5565 {
5566 __be32 *p;
5567 int status;
5568
5569 status = decode_op_hdr(xdr, OP_WRITE);
5570 if (status)
5571 return status;
5572
5573 p = xdr_inline_decode(xdr, 8);
5574 if (unlikely(!p))
5575 goto out_overflow;
5576 res->count = be32_to_cpup(p++);
5577 res->verf->committed = be32_to_cpup(p++);
5578 return decode_write_verifier(xdr, &res->verf->verifier);
5579 out_overflow:
5580 print_overflow_msg(__func__, xdr);
5581 return -EIO;
5582 }
5583
5584 static int decode_delegreturn(struct xdr_stream *xdr)
5585 {
5586 return decode_op_hdr(xdr, OP_DELEGRETURN);
5587 }
5588
5589 static int decode_secinfo_gss(struct xdr_stream *xdr,
5590 struct nfs4_secinfo4 *flavor)
5591 {
5592 u32 oid_len;
5593 __be32 *p;
5594
5595 p = xdr_inline_decode(xdr, 4);
5596 if (unlikely(!p))
5597 goto out_overflow;
5598 oid_len = be32_to_cpup(p);
5599 if (oid_len > GSS_OID_MAX_LEN)
5600 goto out_err;
5601
5602 p = xdr_inline_decode(xdr, oid_len);
5603 if (unlikely(!p))
5604 goto out_overflow;
5605 memcpy(flavor->flavor_info.oid.data, p, oid_len);
5606 flavor->flavor_info.oid.len = oid_len;
5607
5608 p = xdr_inline_decode(xdr, 8);
5609 if (unlikely(!p))
5610 goto out_overflow;
5611 flavor->flavor_info.qop = be32_to_cpup(p++);
5612 flavor->flavor_info.service = be32_to_cpup(p);
5613
5614 return 0;
5615
5616 out_overflow:
5617 print_overflow_msg(__func__, xdr);
5618 return -EIO;
5619 out_err:
5620 return -EINVAL;
5621 }
5622
5623 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5624 {
5625 struct nfs4_secinfo4 *sec_flavor;
5626 unsigned int i, num_flavors;
5627 int status;
5628 __be32 *p;
5629
5630 p = xdr_inline_decode(xdr, 4);
5631 if (unlikely(!p))
5632 goto out_overflow;
5633
5634 res->flavors->num_flavors = 0;
5635 num_flavors = be32_to_cpup(p);
5636
5637 for (i = 0; i < num_flavors; i++) {
5638 sec_flavor = &res->flavors->flavors[i];
5639 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5640 break;
5641
5642 p = xdr_inline_decode(xdr, 4);
5643 if (unlikely(!p))
5644 goto out_overflow;
5645 sec_flavor->flavor = be32_to_cpup(p);
5646
5647 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5648 status = decode_secinfo_gss(xdr, sec_flavor);
5649 if (status)
5650 goto out;
5651 }
5652 res->flavors->num_flavors++;
5653 }
5654
5655 status = 0;
5656 out:
5657 return status;
5658 out_overflow:
5659 print_overflow_msg(__func__, xdr);
5660 return -EIO;
5661 }
5662
5663 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5664 {
5665 int status = decode_op_hdr(xdr, OP_SECINFO);
5666 if (status)
5667 return status;
5668 return decode_secinfo_common(xdr, res);
5669 }
5670
5671 #if defined(CONFIG_NFS_V4_1)
5672 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5673 {
5674 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5675 if (status)
5676 return status;
5677 return decode_secinfo_common(xdr, res);
5678 }
5679
5680 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5681 {
5682 __be32 *p;
5683 uint32_t bitmap_words;
5684 unsigned int i;
5685
5686 p = xdr_inline_decode(xdr, 4);
5687 if (!p)
5688 return -EIO;
5689 bitmap_words = be32_to_cpup(p++);
5690 if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5691 return -EIO;
5692 p = xdr_inline_decode(xdr, 4 * bitmap_words);
5693 for (i = 0; i < bitmap_words; i++)
5694 op_map->u.words[i] = be32_to_cpup(p++);
5695
5696 return 0;
5697 }
5698
5699 static int decode_exchange_id(struct xdr_stream *xdr,
5700 struct nfs41_exchange_id_res *res)
5701 {
5702 __be32 *p;
5703 uint32_t dummy;
5704 char *dummy_str;
5705 int status;
5706 uint32_t impl_id_count;
5707
5708 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5709 if (status)
5710 return status;
5711
5712 p = xdr_inline_decode(xdr, 8);
5713 if (unlikely(!p))
5714 goto out_overflow;
5715 xdr_decode_hyper(p, &res->clientid);
5716 p = xdr_inline_decode(xdr, 12);
5717 if (unlikely(!p))
5718 goto out_overflow;
5719 res->seqid = be32_to_cpup(p++);
5720 res->flags = be32_to_cpup(p++);
5721
5722 res->state_protect.how = be32_to_cpup(p);
5723 switch (res->state_protect.how) {
5724 case SP4_NONE:
5725 break;
5726 case SP4_MACH_CRED:
5727 status = decode_op_map(xdr, &res->state_protect.enforce);
5728 if (status)
5729 return status;
5730 status = decode_op_map(xdr, &res->state_protect.allow);
5731 if (status)
5732 return status;
5733 break;
5734 default:
5735 WARN_ON_ONCE(1);
5736 return -EIO;
5737 }
5738
5739 /* server_owner4.so_minor_id */
5740 p = xdr_inline_decode(xdr, 8);
5741 if (unlikely(!p))
5742 goto out_overflow;
5743 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5744
5745 /* server_owner4.so_major_id */
5746 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5747 if (unlikely(status))
5748 return status;
5749 memcpy(res->server_owner->major_id, dummy_str, dummy);
5750 res->server_owner->major_id_sz = dummy;
5751
5752 /* server_scope4 */
5753 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5754 if (unlikely(status))
5755 return status;
5756 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5757 res->server_scope->server_scope_sz = dummy;
5758
5759 /* Implementation Id */
5760 p = xdr_inline_decode(xdr, 4);
5761 if (unlikely(!p))
5762 goto out_overflow;
5763 impl_id_count = be32_to_cpup(p++);
5764
5765 if (impl_id_count) {
5766 /* nii_domain */
5767 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5768 if (unlikely(status))
5769 return status;
5770 memcpy(res->impl_id->domain, dummy_str, dummy);
5771
5772 /* nii_name */
5773 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5774 if (unlikely(status))
5775 return status;
5776 memcpy(res->impl_id->name, dummy_str, dummy);
5777
5778 /* nii_date */
5779 p = xdr_inline_decode(xdr, 12);
5780 if (unlikely(!p))
5781 goto out_overflow;
5782 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5783 res->impl_id->date.nseconds = be32_to_cpup(p);
5784
5785 /* if there's more than one entry, ignore the rest */
5786 }
5787 return 0;
5788 out_overflow:
5789 print_overflow_msg(__func__, xdr);
5790 return -EIO;
5791 }
5792
5793 static int decode_chan_attrs(struct xdr_stream *xdr,
5794 struct nfs4_channel_attrs *attrs)
5795 {
5796 __be32 *p;
5797 u32 nr_attrs, val;
5798
5799 p = xdr_inline_decode(xdr, 28);
5800 if (unlikely(!p))
5801 goto out_overflow;
5802 val = be32_to_cpup(p++); /* headerpadsz */
5803 if (val)
5804 return -EINVAL; /* no support for header padding yet */
5805 attrs->max_rqst_sz = be32_to_cpup(p++);
5806 attrs->max_resp_sz = be32_to_cpup(p++);
5807 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5808 attrs->max_ops = be32_to_cpup(p++);
5809 attrs->max_reqs = be32_to_cpup(p++);
5810 nr_attrs = be32_to_cpup(p);
5811 if (unlikely(nr_attrs > 1)) {
5812 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5813 "count %u\n", __func__, nr_attrs);
5814 return -EINVAL;
5815 }
5816 if (nr_attrs == 1) {
5817 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5818 if (unlikely(!p))
5819 goto out_overflow;
5820 }
5821 return 0;
5822 out_overflow:
5823 print_overflow_msg(__func__, xdr);
5824 return -EIO;
5825 }
5826
5827 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5828 {
5829 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5830 }
5831
5832 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5833 struct nfs41_bind_conn_to_session_res *res)
5834 {
5835 __be32 *p;
5836 int status;
5837
5838 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5839 if (!status)
5840 status = decode_sessionid(xdr, &res->sessionid);
5841 if (unlikely(status))
5842 return status;
5843
5844 /* dir flags, rdma mode bool */
5845 p = xdr_inline_decode(xdr, 8);
5846 if (unlikely(!p))
5847 goto out_overflow;
5848
5849 res->dir = be32_to_cpup(p++);
5850 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5851 return -EIO;
5852 if (be32_to_cpup(p) == 0)
5853 res->use_conn_in_rdma_mode = false;
5854 else
5855 res->use_conn_in_rdma_mode = true;
5856
5857 return 0;
5858 out_overflow:
5859 print_overflow_msg(__func__, xdr);
5860 return -EIO;
5861 }
5862
5863 static int decode_create_session(struct xdr_stream *xdr,
5864 struct nfs41_create_session_res *res)
5865 {
5866 __be32 *p;
5867 int status;
5868
5869 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5870 if (!status)
5871 status = decode_sessionid(xdr, &res->sessionid);
5872 if (unlikely(status))
5873 return status;
5874
5875 /* seqid, flags */
5876 p = xdr_inline_decode(xdr, 8);
5877 if (unlikely(!p))
5878 goto out_overflow;
5879 res->seqid = be32_to_cpup(p++);
5880 res->flags = be32_to_cpup(p);
5881
5882 /* Channel attributes */
5883 status = decode_chan_attrs(xdr, &res->fc_attrs);
5884 if (!status)
5885 status = decode_chan_attrs(xdr, &res->bc_attrs);
5886 return status;
5887 out_overflow:
5888 print_overflow_msg(__func__, xdr);
5889 return -EIO;
5890 }
5891
5892 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5893 {
5894 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5895 }
5896
5897 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5898 {
5899 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5900 }
5901
5902 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5903 {
5904 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5905 }
5906 #endif /* CONFIG_NFS_V4_1 */
5907
5908 static int decode_sequence(struct xdr_stream *xdr,
5909 struct nfs4_sequence_res *res,
5910 struct rpc_rqst *rqstp)
5911 {
5912 #if defined(CONFIG_NFS_V4_1)
5913 struct nfs4_session *session;
5914 struct nfs4_sessionid id;
5915 u32 dummy;
5916 int status;
5917 __be32 *p;
5918
5919 if (res->sr_slot == NULL)
5920 return 0;
5921 if (!res->sr_slot->table->session)
5922 return 0;
5923
5924 status = decode_op_hdr(xdr, OP_SEQUENCE);
5925 if (!status)
5926 status = decode_sessionid(xdr, &id);
5927 if (unlikely(status))
5928 goto out_err;
5929
5930 /*
5931 * If the server returns different values for sessionID, slotID or
5932 * sequence number, the server is looney tunes.
5933 */
5934 status = -EREMOTEIO;
5935 session = res->sr_slot->table->session;
5936
5937 if (memcmp(id.data, session->sess_id.data,
5938 NFS4_MAX_SESSIONID_LEN)) {
5939 dprintk("%s Invalid session id\n", __func__);
5940 goto out_err;
5941 }
5942
5943 p = xdr_inline_decode(xdr, 20);
5944 if (unlikely(!p))
5945 goto out_overflow;
5946
5947 /* seqid */
5948 dummy = be32_to_cpup(p++);
5949 if (dummy != res->sr_slot->seq_nr) {
5950 dprintk("%s Invalid sequence number\n", __func__);
5951 goto out_err;
5952 }
5953 /* slot id */
5954 dummy = be32_to_cpup(p++);
5955 if (dummy != res->sr_slot->slot_nr) {
5956 dprintk("%s Invalid slot id\n", __func__);
5957 goto out_err;
5958 }
5959 /* highest slot id */
5960 res->sr_highest_slotid = be32_to_cpup(p++);
5961 /* target highest slot id */
5962 res->sr_target_highest_slotid = be32_to_cpup(p++);
5963 /* result flags */
5964 res->sr_status_flags = be32_to_cpup(p);
5965 status = 0;
5966 out_err:
5967 res->sr_status = status;
5968 return status;
5969 out_overflow:
5970 print_overflow_msg(__func__, xdr);
5971 status = -EIO;
5972 goto out_err;
5973 #else /* CONFIG_NFS_V4_1 */
5974 return 0;
5975 #endif /* CONFIG_NFS_V4_1 */
5976 }
5977
5978 #if defined(CONFIG_NFS_V4_1)
5979 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5980 {
5981 stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5982 return decode_stateid(xdr, stateid);
5983 }
5984
5985 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5986 struct nfs4_getdeviceinfo_res *res)
5987 {
5988 struct pnfs_device *pdev = res->pdev;
5989 __be32 *p;
5990 uint32_t len, type;
5991 int status;
5992
5993 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5994 if (status) {
5995 if (status == -ETOOSMALL) {
5996 p = xdr_inline_decode(xdr, 4);
5997 if (unlikely(!p))
5998 goto out_overflow;
5999 pdev->mincount = be32_to_cpup(p);
6000 dprintk("%s: Min count too small. mincnt = %u\n",
6001 __func__, pdev->mincount);
6002 }
6003 return status;
6004 }
6005
6006 p = xdr_inline_decode(xdr, 8);
6007 if (unlikely(!p))
6008 goto out_overflow;
6009 type = be32_to_cpup(p++);
6010 if (type != pdev->layout_type) {
6011 dprintk("%s: layout mismatch req: %u pdev: %u\n",
6012 __func__, pdev->layout_type, type);
6013 return -EINVAL;
6014 }
6015 /*
6016 * Get the length of the opaque device_addr4. xdr_read_pages places
6017 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
6018 * and places the remaining xdr data in xdr_buf->tail
6019 */
6020 pdev->mincount = be32_to_cpup(p);
6021 if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
6022 goto out_overflow;
6023
6024 /* Parse notification bitmap, verifying that it is zero. */
6025 p = xdr_inline_decode(xdr, 4);
6026 if (unlikely(!p))
6027 goto out_overflow;
6028 len = be32_to_cpup(p);
6029 if (len) {
6030 uint32_t i;
6031
6032 p = xdr_inline_decode(xdr, 4 * len);
6033 if (unlikely(!p))
6034 goto out_overflow;
6035
6036 res->notification = be32_to_cpup(p++);
6037 for (i = 1; i < len; i++) {
6038 if (be32_to_cpup(p++)) {
6039 dprintk("%s: unsupported notification\n",
6040 __func__);
6041 return -EIO;
6042 }
6043 }
6044 }
6045 return 0;
6046 out_overflow:
6047 print_overflow_msg(__func__, xdr);
6048 return -EIO;
6049 }
6050
6051 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6052 struct nfs4_layoutget_res *res)
6053 {
6054 __be32 *p;
6055 int status;
6056 u32 layout_count;
6057 u32 recvd;
6058
6059 status = decode_op_hdr(xdr, OP_LAYOUTGET);
6060 if (status)
6061 goto out;
6062 p = xdr_inline_decode(xdr, 4);
6063 if (unlikely(!p))
6064 goto out_overflow;
6065 res->return_on_close = be32_to_cpup(p);
6066 decode_layout_stateid(xdr, &res->stateid);
6067 p = xdr_inline_decode(xdr, 4);
6068 if (unlikely(!p))
6069 goto out_overflow;
6070 layout_count = be32_to_cpup(p);
6071 if (!layout_count) {
6072 dprintk("%s: server responded with empty layout array\n",
6073 __func__);
6074 status = -EINVAL;
6075 goto out;
6076 }
6077
6078 p = xdr_inline_decode(xdr, 28);
6079 if (unlikely(!p))
6080 goto out_overflow;
6081 p = xdr_decode_hyper(p, &res->range.offset);
6082 p = xdr_decode_hyper(p, &res->range.length);
6083 res->range.iomode = be32_to_cpup(p++);
6084 res->type = be32_to_cpup(p++);
6085 res->layoutp->len = be32_to_cpup(p);
6086
6087 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
6088 __func__,
6089 (unsigned long)res->range.offset,
6090 (unsigned long)res->range.length,
6091 res->range.iomode,
6092 res->type,
6093 res->layoutp->len);
6094
6095 recvd = xdr_read_pages(xdr, res->layoutp->len);
6096 if (res->layoutp->len > recvd) {
6097 dprintk("NFS: server cheating in layoutget reply: "
6098 "layout len %u > recvd %u\n",
6099 res->layoutp->len, recvd);
6100 status = -EINVAL;
6101 goto out;
6102 }
6103
6104 if (layout_count > 1) {
6105 /* We only handle a length one array at the moment. Any
6106 * further entries are just ignored. Note that this means
6107 * the client may see a response that is less than the
6108 * minimum it requested.
6109 */
6110 dprintk("%s: server responded with %d layouts, dropping tail\n",
6111 __func__, layout_count);
6112 }
6113
6114 out:
6115 res->status = status;
6116 return status;
6117 out_overflow:
6118 print_overflow_msg(__func__, xdr);
6119 status = -EIO;
6120 goto out;
6121 }
6122
6123 static int decode_layoutreturn(struct xdr_stream *xdr,
6124 struct nfs4_layoutreturn_res *res)
6125 {
6126 __be32 *p;
6127 int status;
6128
6129 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6130 if (status)
6131 return status;
6132 p = xdr_inline_decode(xdr, 4);
6133 if (unlikely(!p))
6134 goto out_overflow;
6135 res->lrs_present = be32_to_cpup(p);
6136 if (res->lrs_present)
6137 status = decode_layout_stateid(xdr, &res->stateid);
6138 else
6139 nfs4_stateid_copy(&res->stateid, &invalid_stateid);
6140 return status;
6141 out_overflow:
6142 print_overflow_msg(__func__, xdr);
6143 return -EIO;
6144 }
6145
6146 static int decode_layoutcommit(struct xdr_stream *xdr,
6147 struct rpc_rqst *req,
6148 struct nfs4_layoutcommit_res *res)
6149 {
6150 __be32 *p;
6151 __u32 sizechanged;
6152 int status;
6153
6154 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6155 res->status = status;
6156 if (status)
6157 return status;
6158
6159 p = xdr_inline_decode(xdr, 4);
6160 if (unlikely(!p))
6161 goto out_overflow;
6162 sizechanged = be32_to_cpup(p);
6163
6164 if (sizechanged) {
6165 /* throw away new size */
6166 p = xdr_inline_decode(xdr, 8);
6167 if (unlikely(!p))
6168 goto out_overflow;
6169 }
6170 return 0;
6171 out_overflow:
6172 print_overflow_msg(__func__, xdr);
6173 return -EIO;
6174 }
6175
6176 static int decode_test_stateid(struct xdr_stream *xdr,
6177 struct nfs41_test_stateid_res *res)
6178 {
6179 __be32 *p;
6180 int status;
6181 int num_res;
6182
6183 status = decode_op_hdr(xdr, OP_TEST_STATEID);
6184 if (status)
6185 return status;
6186
6187 p = xdr_inline_decode(xdr, 4);
6188 if (unlikely(!p))
6189 goto out_overflow;
6190 num_res = be32_to_cpup(p++);
6191 if (num_res != 1)
6192 goto out;
6193
6194 p = xdr_inline_decode(xdr, 4);
6195 if (unlikely(!p))
6196 goto out_overflow;
6197 res->status = be32_to_cpup(p++);
6198
6199 return status;
6200 out_overflow:
6201 print_overflow_msg(__func__, xdr);
6202 out:
6203 return -EIO;
6204 }
6205
6206 static int decode_free_stateid(struct xdr_stream *xdr,
6207 struct nfs41_free_stateid_res *res)
6208 {
6209 res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6210 return res->status;
6211 }
6212 #else
6213 static inline
6214 int decode_layoutreturn(struct xdr_stream *xdr,
6215 struct nfs4_layoutreturn_res *res)
6216 {
6217 return 0;
6218 }
6219
6220 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6221 struct nfs4_layoutget_res *res)
6222 {
6223 return 0;
6224 }
6225
6226 #endif /* CONFIG_NFS_V4_1 */
6227
6228 /*
6229 * END OF "GENERIC" DECODE ROUTINES.
6230 */
6231
6232 /*
6233 * Decode OPEN_DOWNGRADE response
6234 */
6235 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6236 struct xdr_stream *xdr,
6237 void *data)
6238 {
6239 struct nfs_closeres *res = data;
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 if (res->lr_res) {
6253 status = decode_layoutreturn(xdr, res->lr_res);
6254 res->lr_ret = status;
6255 if (status)
6256 goto out;
6257 }
6258 status = decode_open_downgrade(xdr, res);
6259 out:
6260 return status;
6261 }
6262
6263 /*
6264 * Decode ACCESS response
6265 */
6266 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6267 void *data)
6268 {
6269 struct nfs4_accessres *res = data;
6270 struct compound_hdr hdr;
6271 int status;
6272
6273 status = decode_compound_hdr(xdr, &hdr);
6274 if (status)
6275 goto out;
6276 status = decode_sequence(xdr, &res->seq_res, rqstp);
6277 if (status)
6278 goto out;
6279 status = decode_putfh(xdr);
6280 if (status != 0)
6281 goto out;
6282 status = decode_access(xdr, &res->supported, &res->access);
6283 if (status != 0)
6284 goto out;
6285 if (res->fattr)
6286 decode_getfattr(xdr, res->fattr, res->server);
6287 out:
6288 return status;
6289 }
6290
6291 /*
6292 * Decode LOOKUP response
6293 */
6294 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6295 void *data)
6296 {
6297 struct nfs4_lookup_res *res = data;
6298 struct compound_hdr hdr;
6299 int status;
6300
6301 status = decode_compound_hdr(xdr, &hdr);
6302 if (status)
6303 goto out;
6304 status = decode_sequence(xdr, &res->seq_res, rqstp);
6305 if (status)
6306 goto out;
6307 status = decode_putfh(xdr);
6308 if (status)
6309 goto out;
6310 status = decode_lookup(xdr);
6311 if (status)
6312 goto out;
6313 status = decode_getfh(xdr, res->fh);
6314 if (status)
6315 goto out;
6316 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6317 out:
6318 return status;
6319 }
6320
6321 /*
6322 * Decode LOOKUPP response
6323 */
6324 static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6325 void *data)
6326 {
6327 struct nfs4_lookupp_res *res = data;
6328 struct compound_hdr hdr;
6329 int status;
6330
6331 status = decode_compound_hdr(xdr, &hdr);
6332 if (status)
6333 goto out;
6334 status = decode_sequence(xdr, &res->seq_res, rqstp);
6335 if (status)
6336 goto out;
6337 status = decode_putfh(xdr);
6338 if (status)
6339 goto out;
6340 status = decode_lookupp(xdr);
6341 if (status)
6342 goto out;
6343 status = decode_getfh(xdr, res->fh);
6344 if (status)
6345 goto out;
6346 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6347 out:
6348 return status;
6349 }
6350
6351 /*
6352 * Decode LOOKUP_ROOT response
6353 */
6354 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6355 struct xdr_stream *xdr,
6356 void *data)
6357 {
6358 struct nfs4_lookup_res *res = data;
6359 struct compound_hdr hdr;
6360 int status;
6361
6362 status = decode_compound_hdr(xdr, &hdr);
6363 if (status)
6364 goto out;
6365 status = decode_sequence(xdr, &res->seq_res, rqstp);
6366 if (status)
6367 goto out;
6368 status = decode_putrootfh(xdr);
6369 if (status)
6370 goto out;
6371 status = decode_getfh(xdr, res->fh);
6372 if (status == 0)
6373 status = decode_getfattr_label(xdr, res->fattr,
6374 res->label, res->server);
6375 out:
6376 return status;
6377 }
6378
6379 /*
6380 * Decode REMOVE response
6381 */
6382 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6383 void *data)
6384 {
6385 struct nfs_removeres *res = data;
6386 struct compound_hdr hdr;
6387 int status;
6388
6389 status = decode_compound_hdr(xdr, &hdr);
6390 if (status)
6391 goto out;
6392 status = decode_sequence(xdr, &res->seq_res, rqstp);
6393 if (status)
6394 goto out;
6395 status = decode_putfh(xdr);
6396 if (status)
6397 goto out;
6398 status = decode_remove(xdr, &res->cinfo);
6399 out:
6400 return status;
6401 }
6402
6403 /*
6404 * Decode RENAME response
6405 */
6406 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6407 void *data)
6408 {
6409 struct nfs_renameres *res = data;
6410 struct compound_hdr hdr;
6411 int status;
6412
6413 status = decode_compound_hdr(xdr, &hdr);
6414 if (status)
6415 goto out;
6416 status = decode_sequence(xdr, &res->seq_res, rqstp);
6417 if (status)
6418 goto out;
6419 status = decode_putfh(xdr);
6420 if (status)
6421 goto out;
6422 status = decode_savefh(xdr);
6423 if (status)
6424 goto out;
6425 status = decode_putfh(xdr);
6426 if (status)
6427 goto out;
6428 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6429 out:
6430 return status;
6431 }
6432
6433 /*
6434 * Decode LINK response
6435 */
6436 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6437 void *data)
6438 {
6439 struct nfs4_link_res *res = data;
6440 struct compound_hdr hdr;
6441 int status;
6442
6443 status = decode_compound_hdr(xdr, &hdr);
6444 if (status)
6445 goto out;
6446 status = decode_sequence(xdr, &res->seq_res, rqstp);
6447 if (status)
6448 goto out;
6449 status = decode_putfh(xdr);
6450 if (status)
6451 goto out;
6452 status = decode_savefh(xdr);
6453 if (status)
6454 goto out;
6455 status = decode_putfh(xdr);
6456 if (status)
6457 goto out;
6458 status = decode_link(xdr, &res->cinfo);
6459 if (status)
6460 goto out;
6461 /*
6462 * Note order: OP_LINK leaves the directory as the current
6463 * filehandle.
6464 */
6465 status = decode_restorefh(xdr);
6466 if (status)
6467 goto out;
6468 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6469 out:
6470 return status;
6471 }
6472
6473 /*
6474 * Decode CREATE response
6475 */
6476 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6477 void *data)
6478 {
6479 struct nfs4_create_res *res = data;
6480 struct compound_hdr hdr;
6481 int status;
6482
6483 status = decode_compound_hdr(xdr, &hdr);
6484 if (status)
6485 goto out;
6486 status = decode_sequence(xdr, &res->seq_res, rqstp);
6487 if (status)
6488 goto out;
6489 status = decode_putfh(xdr);
6490 if (status)
6491 goto out;
6492 status = decode_create(xdr, &res->dir_cinfo);
6493 if (status)
6494 goto out;
6495 status = decode_getfh(xdr, res->fh);
6496 if (status)
6497 goto out;
6498 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6499 out:
6500 return status;
6501 }
6502
6503 /*
6504 * Decode SYMLINK response
6505 */
6506 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6507 void *res)
6508 {
6509 return nfs4_xdr_dec_create(rqstp, xdr, res);
6510 }
6511
6512 /*
6513 * Decode GETATTR response
6514 */
6515 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6516 void *data)
6517 {
6518 struct nfs4_getattr_res *res = data;
6519 struct compound_hdr hdr;
6520 int status;
6521
6522 status = decode_compound_hdr(xdr, &hdr);
6523 if (status)
6524 goto out;
6525 status = decode_sequence(xdr, &res->seq_res, rqstp);
6526 if (status)
6527 goto out;
6528 status = decode_putfh(xdr);
6529 if (status)
6530 goto out;
6531 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6532 out:
6533 return status;
6534 }
6535
6536 /*
6537 * Encode an SETACL request
6538 */
6539 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6540 const void *data)
6541 {
6542 const struct nfs_setaclargs *args = data;
6543 struct compound_hdr hdr = {
6544 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6545 };
6546
6547 encode_compound_hdr(xdr, req, &hdr);
6548 encode_sequence(xdr, &args->seq_args, &hdr);
6549 encode_putfh(xdr, args->fh, &hdr);
6550 encode_setacl(xdr, args, &hdr);
6551 encode_nops(&hdr);
6552 }
6553
6554 /*
6555 * Decode SETACL response
6556 */
6557 static int
6558 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6559 void *data)
6560 {
6561 struct nfs_setaclres *res = data;
6562 struct compound_hdr hdr;
6563 int status;
6564
6565 status = decode_compound_hdr(xdr, &hdr);
6566 if (status)
6567 goto out;
6568 status = decode_sequence(xdr, &res->seq_res, rqstp);
6569 if (status)
6570 goto out;
6571 status = decode_putfh(xdr);
6572 if (status)
6573 goto out;
6574 status = decode_setattr(xdr);
6575 out:
6576 return status;
6577 }
6578
6579 /*
6580 * Decode GETACL response
6581 */
6582 static int
6583 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6584 void *data)
6585 {
6586 struct nfs_getaclres *res = data;
6587 struct compound_hdr hdr;
6588 int status;
6589
6590 if (res->acl_scratch != NULL) {
6591 void *p = page_address(res->acl_scratch);
6592 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6593 }
6594 status = decode_compound_hdr(xdr, &hdr);
6595 if (status)
6596 goto out;
6597 status = decode_sequence(xdr, &res->seq_res, rqstp);
6598 if (status)
6599 goto out;
6600 status = decode_putfh(xdr);
6601 if (status)
6602 goto out;
6603 status = decode_getacl(xdr, rqstp, res);
6604
6605 out:
6606 return status;
6607 }
6608
6609 /*
6610 * Decode CLOSE response
6611 */
6612 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6613 void *data)
6614 {
6615 struct nfs_closeres *res = data;
6616 struct compound_hdr hdr;
6617 int status;
6618
6619 status = decode_compound_hdr(xdr, &hdr);
6620 if (status)
6621 goto out;
6622 status = decode_sequence(xdr, &res->seq_res, rqstp);
6623 if (status)
6624 goto out;
6625 status = decode_putfh(xdr);
6626 if (status)
6627 goto out;
6628 if (res->lr_res) {
6629 status = decode_layoutreturn(xdr, res->lr_res);
6630 res->lr_ret = status;
6631 if (status)
6632 goto out;
6633 }
6634 if (res->fattr != NULL) {
6635 status = decode_getfattr(xdr, res->fattr, res->server);
6636 if (status != 0)
6637 goto out;
6638 }
6639 status = decode_close(xdr, res);
6640 out:
6641 return status;
6642 }
6643
6644 /*
6645 * Decode OPEN response
6646 */
6647 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6648 void *data)
6649 {
6650 struct nfs_openres *res = data;
6651 struct compound_hdr hdr;
6652 int status;
6653
6654 status = decode_compound_hdr(xdr, &hdr);
6655 if (status)
6656 goto out;
6657 status = decode_sequence(xdr, &res->seq_res, rqstp);
6658 if (status)
6659 goto out;
6660 status = decode_putfh(xdr);
6661 if (status)
6662 goto out;
6663 status = decode_open(xdr, res);
6664 if (status)
6665 goto out;
6666 status = decode_getfh(xdr, &res->fh);
6667 if (status)
6668 goto out;
6669 if (res->access_request)
6670 decode_access(xdr, &res->access_supported, &res->access_result);
6671 decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6672 if (res->lg_res)
6673 decode_layoutget(xdr, rqstp, res->lg_res);
6674 out:
6675 return status;
6676 }
6677
6678 /*
6679 * Decode OPEN_CONFIRM response
6680 */
6681 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6682 struct xdr_stream *xdr,
6683 void *data)
6684 {
6685 struct nfs_open_confirmres *res = data;
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_putfh(xdr);
6693 if (status)
6694 goto out;
6695 status = decode_open_confirm(xdr, res);
6696 out:
6697 return status;
6698 }
6699
6700 /*
6701 * Decode OPEN response
6702 */
6703 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6704 struct xdr_stream *xdr,
6705 void *data)
6706 {
6707 struct nfs_openres *res = data;
6708 struct compound_hdr hdr;
6709 int status;
6710
6711 status = decode_compound_hdr(xdr, &hdr);
6712 if (status)
6713 goto out;
6714 status = decode_sequence(xdr, &res->seq_res, rqstp);
6715 if (status)
6716 goto out;
6717 status = decode_putfh(xdr);
6718 if (status)
6719 goto out;
6720 status = decode_open(xdr, res);
6721 if (status)
6722 goto out;
6723 if (res->access_request)
6724 decode_access(xdr, &res->access_supported, &res->access_result);
6725 decode_getfattr(xdr, res->f_attr, res->server);
6726 if (res->lg_res)
6727 decode_layoutget(xdr, rqstp, res->lg_res);
6728 out:
6729 return status;
6730 }
6731
6732 /*
6733 * Decode SETATTR response
6734 */
6735 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6736 struct xdr_stream *xdr,
6737 void *data)
6738 {
6739 struct nfs_setattrres *res = data;
6740 struct compound_hdr hdr;
6741 int status;
6742
6743 status = decode_compound_hdr(xdr, &hdr);
6744 if (status)
6745 goto out;
6746 status = decode_sequence(xdr, &res->seq_res, rqstp);
6747 if (status)
6748 goto out;
6749 status = decode_putfh(xdr);
6750 if (status)
6751 goto out;
6752 status = decode_setattr(xdr);
6753 if (status)
6754 goto out;
6755 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6756 out:
6757 return status;
6758 }
6759
6760 /*
6761 * Decode LOCK response
6762 */
6763 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6764 void *data)
6765 {
6766 struct nfs_lock_res *res = data;
6767 struct compound_hdr hdr;
6768 int status;
6769
6770 status = decode_compound_hdr(xdr, &hdr);
6771 if (status)
6772 goto out;
6773 status = decode_sequence(xdr, &res->seq_res, rqstp);
6774 if (status)
6775 goto out;
6776 status = decode_putfh(xdr);
6777 if (status)
6778 goto out;
6779 status = decode_lock(xdr, res);
6780 out:
6781 return status;
6782 }
6783
6784 /*
6785 * Decode LOCKT response
6786 */
6787 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6788 void *data)
6789 {
6790 struct nfs_lockt_res *res = data;
6791 struct compound_hdr hdr;
6792 int status;
6793
6794 status = decode_compound_hdr(xdr, &hdr);
6795 if (status)
6796 goto out;
6797 status = decode_sequence(xdr, &res->seq_res, rqstp);
6798 if (status)
6799 goto out;
6800 status = decode_putfh(xdr);
6801 if (status)
6802 goto out;
6803 status = decode_lockt(xdr, res);
6804 out:
6805 return status;
6806 }
6807
6808 /*
6809 * Decode LOCKU response
6810 */
6811 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6812 void *data)
6813 {
6814 struct nfs_locku_res *res = data;
6815 struct compound_hdr hdr;
6816 int status;
6817
6818 status = decode_compound_hdr(xdr, &hdr);
6819 if (status)
6820 goto out;
6821 status = decode_sequence(xdr, &res->seq_res, rqstp);
6822 if (status)
6823 goto out;
6824 status = decode_putfh(xdr);
6825 if (status)
6826 goto out;
6827 status = decode_locku(xdr, res);
6828 out:
6829 return status;
6830 }
6831
6832 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6833 struct xdr_stream *xdr, void *dummy)
6834 {
6835 struct compound_hdr hdr;
6836 int status;
6837
6838 status = decode_compound_hdr(xdr, &hdr);
6839 if (!status)
6840 status = decode_release_lockowner(xdr);
6841 return status;
6842 }
6843
6844 /*
6845 * Decode READLINK response
6846 */
6847 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6848 struct xdr_stream *xdr,
6849 void *data)
6850 {
6851 struct nfs4_readlink_res *res = data;
6852 struct compound_hdr hdr;
6853 int status;
6854
6855 status = decode_compound_hdr(xdr, &hdr);
6856 if (status)
6857 goto out;
6858 status = decode_sequence(xdr, &res->seq_res, rqstp);
6859 if (status)
6860 goto out;
6861 status = decode_putfh(xdr);
6862 if (status)
6863 goto out;
6864 status = decode_readlink(xdr, rqstp);
6865 out:
6866 return status;
6867 }
6868
6869 /*
6870 * Decode READDIR response
6871 */
6872 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6873 void *data)
6874 {
6875 struct nfs4_readdir_res *res = data;
6876 struct compound_hdr hdr;
6877 int status;
6878
6879 status = decode_compound_hdr(xdr, &hdr);
6880 if (status)
6881 goto out;
6882 status = decode_sequence(xdr, &res->seq_res, rqstp);
6883 if (status)
6884 goto out;
6885 status = decode_putfh(xdr);
6886 if (status)
6887 goto out;
6888 status = decode_readdir(xdr, rqstp, res);
6889 out:
6890 return status;
6891 }
6892
6893 /*
6894 * Decode Read response
6895 */
6896 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6897 void *data)
6898 {
6899 struct nfs_pgio_res *res = data;
6900 struct compound_hdr hdr;
6901 int status;
6902
6903 status = decode_compound_hdr(xdr, &hdr);
6904 res->op_status = hdr.status;
6905 if (status)
6906 goto out;
6907 status = decode_sequence(xdr, &res->seq_res, rqstp);
6908 if (status)
6909 goto out;
6910 status = decode_putfh(xdr);
6911 if (status)
6912 goto out;
6913 status = decode_read(xdr, rqstp, res);
6914 if (!status)
6915 status = res->count;
6916 out:
6917 return status;
6918 }
6919
6920 /*
6921 * Decode WRITE response
6922 */
6923 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6924 void *data)
6925 {
6926 struct nfs_pgio_res *res = data;
6927 struct compound_hdr hdr;
6928 int status;
6929
6930 status = decode_compound_hdr(xdr, &hdr);
6931 res->op_status = hdr.status;
6932 if (status)
6933 goto out;
6934 status = decode_sequence(xdr, &res->seq_res, rqstp);
6935 if (status)
6936 goto out;
6937 status = decode_putfh(xdr);
6938 if (status)
6939 goto out;
6940 status = decode_write(xdr, res);
6941 if (status)
6942 goto out;
6943 if (res->fattr)
6944 decode_getfattr(xdr, res->fattr, res->server);
6945 if (!status)
6946 status = res->count;
6947 out:
6948 return status;
6949 }
6950
6951 /*
6952 * Decode COMMIT response
6953 */
6954 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6955 void *data)
6956 {
6957 struct nfs_commitres *res = data;
6958 struct compound_hdr hdr;
6959 int status;
6960
6961 status = decode_compound_hdr(xdr, &hdr);
6962 res->op_status = hdr.status;
6963 if (status)
6964 goto out;
6965 status = decode_sequence(xdr, &res->seq_res, rqstp);
6966 if (status)
6967 goto out;
6968 status = decode_putfh(xdr);
6969 if (status)
6970 goto out;
6971 status = decode_commit(xdr, res);
6972 out:
6973 return status;
6974 }
6975
6976 /*
6977 * Decode FSINFO response
6978 */
6979 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6980 void *data)
6981 {
6982 struct nfs4_fsinfo_res *res = data;
6983 struct compound_hdr hdr;
6984 int status;
6985
6986 status = decode_compound_hdr(xdr, &hdr);
6987 if (!status)
6988 status = decode_sequence(xdr, &res->seq_res, req);
6989 if (!status)
6990 status = decode_putfh(xdr);
6991 if (!status)
6992 status = decode_fsinfo(xdr, res->fsinfo);
6993 return status;
6994 }
6995
6996 /*
6997 * Decode PATHCONF response
6998 */
6999 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
7000 void *data)
7001 {
7002 struct nfs4_pathconf_res *res = data;
7003 struct compound_hdr hdr;
7004 int status;
7005
7006 status = decode_compound_hdr(xdr, &hdr);
7007 if (!status)
7008 status = decode_sequence(xdr, &res->seq_res, req);
7009 if (!status)
7010 status = decode_putfh(xdr);
7011 if (!status)
7012 status = decode_pathconf(xdr, res->pathconf);
7013 return status;
7014 }
7015
7016 /*
7017 * Decode STATFS response
7018 */
7019 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
7020 void *data)
7021 {
7022 struct nfs4_statfs_res *res = data;
7023 struct compound_hdr hdr;
7024 int status;
7025
7026 status = decode_compound_hdr(xdr, &hdr);
7027 if (!status)
7028 status = decode_sequence(xdr, &res->seq_res, req);
7029 if (!status)
7030 status = decode_putfh(xdr);
7031 if (!status)
7032 status = decode_statfs(xdr, res->fsstat);
7033 return status;
7034 }
7035
7036 /*
7037 * Decode GETATTR_BITMAP response
7038 */
7039 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
7040 struct xdr_stream *xdr,
7041 void *data)
7042 {
7043 struct nfs4_server_caps_res *res = data;
7044 struct compound_hdr hdr;
7045 int status;
7046
7047 status = decode_compound_hdr(xdr, &hdr);
7048 if (status)
7049 goto out;
7050 status = decode_sequence(xdr, &res->seq_res, req);
7051 if (status)
7052 goto out;
7053 status = decode_putfh(xdr);
7054 if (status)
7055 goto out;
7056 status = decode_server_caps(xdr, res);
7057 out:
7058 return status;
7059 }
7060
7061 /*
7062 * Decode RENEW response
7063 */
7064 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
7065 void *__unused)
7066 {
7067 struct compound_hdr hdr;
7068 int status;
7069
7070 status = decode_compound_hdr(xdr, &hdr);
7071 if (!status)
7072 status = decode_renew(xdr);
7073 return status;
7074 }
7075
7076 /*
7077 * Decode SETCLIENTID response
7078 */
7079 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
7080 struct xdr_stream *xdr,
7081 void *data)
7082 {
7083 struct nfs4_setclientid_res *res = data;
7084 struct compound_hdr hdr;
7085 int status;
7086
7087 status = decode_compound_hdr(xdr, &hdr);
7088 if (!status)
7089 status = decode_setclientid(xdr, res);
7090 return status;
7091 }
7092
7093 /*
7094 * Decode SETCLIENTID_CONFIRM response
7095 */
7096 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
7097 struct xdr_stream *xdr,
7098 void *data)
7099 {
7100 struct compound_hdr hdr;
7101 int status;
7102
7103 status = decode_compound_hdr(xdr, &hdr);
7104 if (!status)
7105 status = decode_setclientid_confirm(xdr);
7106 return status;
7107 }
7108
7109 /*
7110 * Decode DELEGRETURN response
7111 */
7112 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
7113 struct xdr_stream *xdr,
7114 void *data)
7115 {
7116 struct nfs4_delegreturnres *res = data;
7117 struct compound_hdr hdr;
7118 int status;
7119
7120 status = decode_compound_hdr(xdr, &hdr);
7121 if (status)
7122 goto out;
7123 status = decode_sequence(xdr, &res->seq_res, rqstp);
7124 if (status)
7125 goto out;
7126 status = decode_putfh(xdr);
7127 if (status != 0)
7128 goto out;
7129 if (res->lr_res) {
7130 status = decode_layoutreturn(xdr, res->lr_res);
7131 res->lr_ret = status;
7132 if (status)
7133 goto out;
7134 }
7135 if (res->fattr) {
7136 status = decode_getfattr(xdr, res->fattr, res->server);
7137 if (status != 0)
7138 goto out;
7139 }
7140 status = decode_delegreturn(xdr);
7141 out:
7142 return status;
7143 }
7144
7145 /*
7146 * Decode FS_LOCATIONS response
7147 */
7148 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
7149 struct xdr_stream *xdr,
7150 void *data)
7151 {
7152 struct nfs4_fs_locations_res *res = data;
7153 struct compound_hdr hdr;
7154 int status;
7155
7156 status = decode_compound_hdr(xdr, &hdr);
7157 if (status)
7158 goto out;
7159 status = decode_sequence(xdr, &res->seq_res, req);
7160 if (status)
7161 goto out;
7162 status = decode_putfh(xdr);
7163 if (status)
7164 goto out;
7165 if (res->migration) {
7166 xdr_enter_page(xdr, PAGE_SIZE);
7167 status = decode_getfattr_generic(xdr,
7168 &res->fs_locations->fattr,
7169 NULL, res->fs_locations,
7170 NULL, res->fs_locations->server);
7171 if (status)
7172 goto out;
7173 if (res->renew)
7174 status = decode_renew(xdr);
7175 } else {
7176 status = decode_lookup(xdr);
7177 if (status)
7178 goto out;
7179 xdr_enter_page(xdr, PAGE_SIZE);
7180 status = decode_getfattr_generic(xdr,
7181 &res->fs_locations->fattr,
7182 NULL, res->fs_locations,
7183 NULL, res->fs_locations->server);
7184 }
7185 out:
7186 return status;
7187 }
7188
7189 /*
7190 * Decode SECINFO response
7191 */
7192 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7193 struct xdr_stream *xdr,
7194 void *data)
7195 {
7196 struct nfs4_secinfo_res *res = data;
7197 struct compound_hdr hdr;
7198 int status;
7199
7200 status = decode_compound_hdr(xdr, &hdr);
7201 if (status)
7202 goto out;
7203 status = decode_sequence(xdr, &res->seq_res, rqstp);
7204 if (status)
7205 goto out;
7206 status = decode_putfh(xdr);
7207 if (status)
7208 goto out;
7209 status = decode_secinfo(xdr, res);
7210 out:
7211 return status;
7212 }
7213
7214 /*
7215 * Decode FSID_PRESENT response
7216 */
7217 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7218 struct xdr_stream *xdr,
7219 void *data)
7220 {
7221 struct nfs4_fsid_present_res *res = data;
7222 struct compound_hdr hdr;
7223 int status;
7224
7225 status = decode_compound_hdr(xdr, &hdr);
7226 if (status)
7227 goto out;
7228 status = decode_sequence(xdr, &res->seq_res, rqstp);
7229 if (status)
7230 goto out;
7231 status = decode_putfh(xdr);
7232 if (status)
7233 goto out;
7234 status = decode_getfh(xdr, res->fh);
7235 if (status)
7236 goto out;
7237 if (res->renew)
7238 status = decode_renew(xdr);
7239 out:
7240 return status;
7241 }
7242
7243 #if defined(CONFIG_NFS_V4_1)
7244 /*
7245 * Decode BIND_CONN_TO_SESSION response
7246 */
7247 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7248 struct xdr_stream *xdr,
7249 void *res)
7250 {
7251 struct compound_hdr hdr;
7252 int status;
7253
7254 status = decode_compound_hdr(xdr, &hdr);
7255 if (!status)
7256 status = decode_bind_conn_to_session(xdr, res);
7257 return status;
7258 }
7259
7260 /*
7261 * Decode EXCHANGE_ID response
7262 */
7263 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7264 struct xdr_stream *xdr,
7265 void *res)
7266 {
7267 struct compound_hdr hdr;
7268 int status;
7269
7270 status = decode_compound_hdr(xdr, &hdr);
7271 if (!status)
7272 status = decode_exchange_id(xdr, res);
7273 return status;
7274 }
7275
7276 /*
7277 * Decode CREATE_SESSION response
7278 */
7279 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7280 struct xdr_stream *xdr,
7281 void *res)
7282 {
7283 struct compound_hdr hdr;
7284 int status;
7285
7286 status = decode_compound_hdr(xdr, &hdr);
7287 if (!status)
7288 status = decode_create_session(xdr, res);
7289 return status;
7290 }
7291
7292 /*
7293 * Decode DESTROY_SESSION response
7294 */
7295 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7296 struct xdr_stream *xdr,
7297 void *res)
7298 {
7299 struct compound_hdr hdr;
7300 int status;
7301
7302 status = decode_compound_hdr(xdr, &hdr);
7303 if (!status)
7304 status = decode_destroy_session(xdr, res);
7305 return status;
7306 }
7307
7308 /*
7309 * Decode DESTROY_CLIENTID response
7310 */
7311 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7312 struct xdr_stream *xdr,
7313 void *res)
7314 {
7315 struct compound_hdr hdr;
7316 int status;
7317
7318 status = decode_compound_hdr(xdr, &hdr);
7319 if (!status)
7320 status = decode_destroy_clientid(xdr, res);
7321 return status;
7322 }
7323
7324 /*
7325 * Decode SEQUENCE response
7326 */
7327 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7328 struct xdr_stream *xdr,
7329 void *res)
7330 {
7331 struct compound_hdr hdr;
7332 int status;
7333
7334 status = decode_compound_hdr(xdr, &hdr);
7335 if (!status)
7336 status = decode_sequence(xdr, res, rqstp);
7337 return status;
7338 }
7339
7340 /*
7341 * Decode GET_LEASE_TIME response
7342 */
7343 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7344 struct xdr_stream *xdr,
7345 void *data)
7346 {
7347 struct nfs4_get_lease_time_res *res = data;
7348 struct compound_hdr hdr;
7349 int status;
7350
7351 status = decode_compound_hdr(xdr, &hdr);
7352 if (!status)
7353 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7354 if (!status)
7355 status = decode_putrootfh(xdr);
7356 if (!status)
7357 status = decode_fsinfo(xdr, res->lr_fsinfo);
7358 return status;
7359 }
7360
7361 /*
7362 * Decode RECLAIM_COMPLETE response
7363 */
7364 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7365 struct xdr_stream *xdr,
7366 void *data)
7367 {
7368 struct nfs41_reclaim_complete_res *res = data;
7369 struct compound_hdr hdr;
7370 int status;
7371
7372 status = decode_compound_hdr(xdr, &hdr);
7373 if (!status)
7374 status = decode_sequence(xdr, &res->seq_res, rqstp);
7375 if (!status)
7376 status = decode_reclaim_complete(xdr, NULL);
7377 return status;
7378 }
7379
7380 /*
7381 * Decode GETDEVINFO response
7382 */
7383 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7384 struct xdr_stream *xdr,
7385 void *data)
7386 {
7387 struct nfs4_getdeviceinfo_res *res = data;
7388 struct compound_hdr hdr;
7389 int status;
7390
7391 status = decode_compound_hdr(xdr, &hdr);
7392 if (status != 0)
7393 goto out;
7394 status = decode_sequence(xdr, &res->seq_res, rqstp);
7395 if (status != 0)
7396 goto out;
7397 status = decode_getdeviceinfo(xdr, res);
7398 out:
7399 return status;
7400 }
7401
7402 /*
7403 * Decode LAYOUTGET response
7404 */
7405 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7406 struct xdr_stream *xdr,
7407 void *data)
7408 {
7409 struct nfs4_layoutget_res *res = data;
7410 struct compound_hdr hdr;
7411 int status;
7412
7413 status = decode_compound_hdr(xdr, &hdr);
7414 if (status)
7415 goto out;
7416 status = decode_sequence(xdr, &res->seq_res, rqstp);
7417 if (status)
7418 goto out;
7419 status = decode_putfh(xdr);
7420 if (status)
7421 goto out;
7422 status = decode_layoutget(xdr, rqstp, res);
7423 out:
7424 return status;
7425 }
7426
7427 /*
7428 * Decode LAYOUTRETURN response
7429 */
7430 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7431 struct xdr_stream *xdr,
7432 void *data)
7433 {
7434 struct nfs4_layoutreturn_res *res = data;
7435 struct compound_hdr hdr;
7436 int status;
7437
7438 status = decode_compound_hdr(xdr, &hdr);
7439 if (status)
7440 goto out;
7441 status = decode_sequence(xdr, &res->seq_res, rqstp);
7442 if (status)
7443 goto out;
7444 status = decode_putfh(xdr);
7445 if (status)
7446 goto out;
7447 status = decode_layoutreturn(xdr, res);
7448 out:
7449 return status;
7450 }
7451
7452 /*
7453 * Decode LAYOUTCOMMIT response
7454 */
7455 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7456 struct xdr_stream *xdr,
7457 void *data)
7458 {
7459 struct nfs4_layoutcommit_res *res = data;
7460 struct compound_hdr hdr;
7461 int status;
7462
7463 status = decode_compound_hdr(xdr, &hdr);
7464 if (status)
7465 goto out;
7466 status = decode_sequence(xdr, &res->seq_res, rqstp);
7467 if (status)
7468 goto out;
7469 status = decode_putfh(xdr);
7470 if (status)
7471 goto out;
7472 status = decode_layoutcommit(xdr, rqstp, res);
7473 if (status)
7474 goto out;
7475 decode_getfattr(xdr, res->fattr, res->server);
7476 out:
7477 return status;
7478 }
7479
7480 /*
7481 * Decode SECINFO_NO_NAME response
7482 */
7483 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7484 struct xdr_stream *xdr,
7485 void *data)
7486 {
7487 struct nfs4_secinfo_res *res = data;
7488 struct compound_hdr hdr;
7489 int status;
7490
7491 status = decode_compound_hdr(xdr, &hdr);
7492 if (status)
7493 goto out;
7494 status = decode_sequence(xdr, &res->seq_res, rqstp);
7495 if (status)
7496 goto out;
7497 status = decode_putrootfh(xdr);
7498 if (status)
7499 goto out;
7500 status = decode_secinfo_no_name(xdr, res);
7501 out:
7502 return status;
7503 }
7504
7505 /*
7506 * Decode TEST_STATEID response
7507 */
7508 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7509 struct xdr_stream *xdr,
7510 void *data)
7511 {
7512 struct nfs41_test_stateid_res *res = data;
7513 struct compound_hdr hdr;
7514 int status;
7515
7516 status = decode_compound_hdr(xdr, &hdr);
7517 if (status)
7518 goto out;
7519 status = decode_sequence(xdr, &res->seq_res, rqstp);
7520 if (status)
7521 goto out;
7522 status = decode_test_stateid(xdr, res);
7523 out:
7524 return status;
7525 }
7526
7527 /*
7528 * Decode FREE_STATEID response
7529 */
7530 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7531 struct xdr_stream *xdr,
7532 void *data)
7533 {
7534 struct nfs41_free_stateid_res *res = data;
7535 struct compound_hdr hdr;
7536 int status;
7537
7538 status = decode_compound_hdr(xdr, &hdr);
7539 if (status)
7540 goto out;
7541 status = decode_sequence(xdr, &res->seq_res, rqstp);
7542 if (status)
7543 goto out;
7544 status = decode_free_stateid(xdr, res);
7545 out:
7546 return status;
7547 }
7548 #endif /* CONFIG_NFS_V4_1 */
7549
7550 /**
7551 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7552 * the local page cache.
7553 * @xdr: XDR stream where entry resides
7554 * @entry: buffer to fill in with entry data
7555 * @plus: boolean indicating whether this should be a readdirplus entry
7556 *
7557 * Returns zero if successful, otherwise a negative errno value is
7558 * returned.
7559 *
7560 * This function is not invoked during READDIR reply decoding, but
7561 * rather whenever an application invokes the getdents(2) system call
7562 * on a directory already in our cache.
7563 */
7564 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7565 bool plus)
7566 {
7567 unsigned int savep;
7568 uint32_t bitmap[3] = {0};
7569 uint32_t len;
7570 uint64_t new_cookie;
7571 __be32 *p = xdr_inline_decode(xdr, 4);
7572 if (unlikely(!p))
7573 goto out_overflow;
7574 if (*p == xdr_zero) {
7575 p = xdr_inline_decode(xdr, 4);
7576 if (unlikely(!p))
7577 goto out_overflow;
7578 if (*p == xdr_zero)
7579 return -EAGAIN;
7580 entry->eof = 1;
7581 return -EBADCOOKIE;
7582 }
7583
7584 p = xdr_inline_decode(xdr, 12);
7585 if (unlikely(!p))
7586 goto out_overflow;
7587 p = xdr_decode_hyper(p, &new_cookie);
7588 entry->len = be32_to_cpup(p);
7589
7590 p = xdr_inline_decode(xdr, entry->len);
7591 if (unlikely(!p))
7592 goto out_overflow;
7593 entry->name = (const char *) p;
7594
7595 /*
7596 * In case the server doesn't return an inode number,
7597 * we fake one here. (We don't use inode number 0,
7598 * since glibc seems to choke on it...)
7599 */
7600 entry->ino = 1;
7601 entry->fattr->valid = 0;
7602
7603 if (decode_attr_bitmap(xdr, bitmap) < 0)
7604 goto out_overflow;
7605
7606 if (decode_attr_length(xdr, &len, &savep) < 0)
7607 goto out_overflow;
7608
7609 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7610 NULL, entry->label, entry->server) < 0)
7611 goto out_overflow;
7612 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7613 entry->ino = entry->fattr->mounted_on_fileid;
7614 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7615 entry->ino = entry->fattr->fileid;
7616
7617 entry->d_type = DT_UNKNOWN;
7618 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7619 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7620
7621 entry->prev_cookie = entry->cookie;
7622 entry->cookie = new_cookie;
7623
7624 return 0;
7625
7626 out_overflow:
7627 print_overflow_msg(__func__, xdr);
7628 return -EAGAIN;
7629 }
7630
7631 /*
7632 * We need to translate between nfs status return values and
7633 * the local errno values which may not be the same.
7634 */
7635 static struct {
7636 int stat;
7637 int errno;
7638 } nfs_errtbl[] = {
7639 { NFS4_OK, 0 },
7640 { NFS4ERR_PERM, -EPERM },
7641 { NFS4ERR_NOENT, -ENOENT },
7642 { NFS4ERR_IO, -errno_NFSERR_IO},
7643 { NFS4ERR_NXIO, -ENXIO },
7644 { NFS4ERR_ACCESS, -EACCES },
7645 { NFS4ERR_EXIST, -EEXIST },
7646 { NFS4ERR_XDEV, -EXDEV },
7647 { NFS4ERR_NOTDIR, -ENOTDIR },
7648 { NFS4ERR_ISDIR, -EISDIR },
7649 { NFS4ERR_INVAL, -EINVAL },
7650 { NFS4ERR_FBIG, -EFBIG },
7651 { NFS4ERR_NOSPC, -ENOSPC },
7652 { NFS4ERR_ROFS, -EROFS },
7653 { NFS4ERR_MLINK, -EMLINK },
7654 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7655 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7656 { NFS4ERR_DQUOT, -EDQUOT },
7657 { NFS4ERR_STALE, -ESTALE },
7658 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7659 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7660 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7661 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7662 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7663 { NFS4ERR_BADTYPE, -EBADTYPE },
7664 { NFS4ERR_LOCKED, -EAGAIN },
7665 { NFS4ERR_SYMLINK, -ELOOP },
7666 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7667 { NFS4ERR_DEADLOCK, -EDEADLK },
7668 { -1, -EIO }
7669 };
7670
7671 /*
7672 * Convert an NFS error code to a local one.
7673 * This one is used jointly by NFSv2 and NFSv3.
7674 */
7675 static int
7676 nfs4_stat_to_errno(int stat)
7677 {
7678 int i;
7679 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7680 if (nfs_errtbl[i].stat == stat)
7681 return nfs_errtbl[i].errno;
7682 }
7683 if (stat <= 10000 || stat > 10100) {
7684 /* The server is looney tunes. */
7685 return -EREMOTEIO;
7686 }
7687 /* If we cannot translate the error, the recovery routines should
7688 * handle it.
7689 * Note: remaining NFSv4 error codes have values > 10000, so should
7690 * not conflict with native Linux error codes.
7691 */
7692 return -stat;
7693 }
7694
7695 #ifdef CONFIG_NFS_V4_2
7696 #include "nfs42xdr.c"
7697 #endif /* CONFIG_NFS_V4_2 */
7698
7699 #define PROC(proc, argtype, restype) \
7700 [NFSPROC4_CLNT_##proc] = { \
7701 .p_proc = NFSPROC4_COMPOUND, \
7702 .p_encode = nfs4_xdr_##argtype, \
7703 .p_decode = nfs4_xdr_##restype, \
7704 .p_arglen = NFS4_##argtype##_sz, \
7705 .p_replen = NFS4_##restype##_sz, \
7706 .p_statidx = NFSPROC4_CLNT_##proc, \
7707 .p_name = #proc, \
7708 }
7709
7710 #define STUB(proc) \
7711 [NFSPROC4_CLNT_##proc] = { \
7712 .p_name = #proc, \
7713 }
7714
7715 #if defined(CONFIG_NFS_V4_1)
7716 #define PROC41(proc, argtype, restype) \
7717 PROC(proc, argtype, restype)
7718 #else
7719 #define PROC41(proc, argtype, restype) \
7720 STUB(proc)
7721 #endif
7722
7723 #if defined(CONFIG_NFS_V4_2)
7724 #define PROC42(proc, argtype, restype) \
7725 PROC(proc, argtype, restype)
7726 #else
7727 #define PROC42(proc, argtype, restype) \
7728 STUB(proc)
7729 #endif
7730
7731 const struct rpc_procinfo nfs4_procedures[] = {
7732 PROC(READ, enc_read, dec_read),
7733 PROC(WRITE, enc_write, dec_write),
7734 PROC(COMMIT, enc_commit, dec_commit),
7735 PROC(OPEN, enc_open, dec_open),
7736 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7737 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7738 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7739 PROC(CLOSE, enc_close, dec_close),
7740 PROC(SETATTR, enc_setattr, dec_setattr),
7741 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7742 PROC(RENEW, enc_renew, dec_renew),
7743 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7744 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7745 PROC(LOCK, enc_lock, dec_lock),
7746 PROC(LOCKT, enc_lockt, dec_lockt),
7747 PROC(LOCKU, enc_locku, dec_locku),
7748 PROC(ACCESS, enc_access, dec_access),
7749 PROC(GETATTR, enc_getattr, dec_getattr),
7750 PROC(LOOKUP, enc_lookup, dec_lookup),
7751 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7752 PROC(REMOVE, enc_remove, dec_remove),
7753 PROC(RENAME, enc_rename, dec_rename),
7754 PROC(LINK, enc_link, dec_link),
7755 PROC(SYMLINK, enc_symlink, dec_symlink),
7756 PROC(CREATE, enc_create, dec_create),
7757 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7758 PROC(STATFS, enc_statfs, dec_statfs),
7759 PROC(READLINK, enc_readlink, dec_readlink),
7760 PROC(READDIR, enc_readdir, dec_readdir),
7761 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7762 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7763 PROC(GETACL, enc_getacl, dec_getacl),
7764 PROC(SETACL, enc_setacl, dec_setacl),
7765 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7766 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7767 PROC(SECINFO, enc_secinfo, dec_secinfo),
7768 PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present),
7769 PROC41(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7770 PROC41(CREATE_SESSION, enc_create_session, dec_create_session),
7771 PROC41(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7772 PROC41(SEQUENCE, enc_sequence, dec_sequence),
7773 PROC41(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7774 PROC41(RECLAIM_COMPLETE,enc_reclaim_complete, dec_reclaim_complete),
7775 PROC41(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7776 PROC41(LAYOUTGET, enc_layoutget, dec_layoutget),
7777 PROC41(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7778 PROC41(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7779 PROC41(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7780 PROC41(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7781 PROC41(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7782 STUB(GETDEVICELIST),
7783 PROC41(BIND_CONN_TO_SESSION,
7784 enc_bind_conn_to_session, dec_bind_conn_to_session),
7785 PROC41(DESTROY_CLIENTID,enc_destroy_clientid, dec_destroy_clientid),
7786 PROC42(SEEK, enc_seek, dec_seek),
7787 PROC42(ALLOCATE, enc_allocate, dec_allocate),
7788 PROC42(DEALLOCATE, enc_deallocate, dec_deallocate),
7789 PROC42(LAYOUTSTATS, enc_layoutstats, dec_layoutstats),
7790 PROC42(CLONE, enc_clone, dec_clone),
7791 PROC42(COPY, enc_copy, dec_copy),
7792 PROC42(OFFLOAD_CANCEL, enc_offload_cancel, dec_offload_cancel),
7793 PROC(LOOKUPP, enc_lookupp, dec_lookupp),
7794 };
7795
7796 static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7797 const struct rpc_version nfs_version4 = {
7798 .number = 4,
7799 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7800 .procs = nfs4_procedures,
7801 .counts = nfs_version4_counts,
7802 };
7803
7804 /*
7805 * Local variables:
7806 * c-basic-offset: 8
7807 * End:
7808 */
Linux with added FPC-III support