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Merge tag 'powerpc-4.13-8' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
[mirror_ubuntu-artful-kernel.git] / fs / nfs / nfs4xdr.c
1 /*
2 * fs/nfs/nfs4xdr.c
3 *
4 * Client-side XDR for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <linux/param.h>
39 #include <linux/time.h>
40 #include <linux/mm.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/in.h>
44 #include <linux/pagemap.h>
45 #include <linux/proc_fs.h>
46 #include <linux/kdev_t.h>
47 #include <linux/module.h>
48 #include <linux/utsname.h>
49 #include <linux/sunrpc/clnt.h>
50 #include <linux/sunrpc/msg_prot.h>
51 #include <linux/sunrpc/gss_api.h>
52 #include <linux/nfs.h>
53 #include <linux/nfs4.h>
54 #include <linux/nfs_fs.h>
55 #include <linux/fs_struct.h>
56
57 #include "nfs4_fs.h"
58 #include "internal.h"
59 #include "nfs4idmap.h"
60 #include "nfs4session.h"
61 #include "pnfs.h"
62 #include "netns.h"
63
64 #define NFSDBG_FACILITY NFSDBG_XDR
65
66 /* Mapping from NFS error code to "errno" error code. */
67 #define errno_NFSERR_IO EIO
68
69 static int nfs4_stat_to_errno(int);
70
71 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
72 #ifdef DEBUG
73 #define NFS4_MAXTAGLEN 20
74 #else
75 #define NFS4_MAXTAGLEN 0
76 #endif
77
78 /* lock,open owner id:
79 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
80 */
81 #define open_owner_id_maxsz (1 + 2 + 1 + 1 + 2)
82 #define lock_owner_id_maxsz (1 + 1 + 4)
83 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
84 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
85 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
86 #define op_encode_hdr_maxsz (1)
87 #define op_decode_hdr_maxsz (2)
88 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
89 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
90 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
91 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
92 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
93 (NFS4_FHSIZE >> 2))
94 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
95 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
96 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
97 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
98 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
99 ((3+NFS4_FHSIZE) >> 2))
100 #define nfs4_fattr_bitmap_maxsz 4
101 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
102 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
103 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
104 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
105 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
106 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
107 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
108 #define nfs4_label_maxsz (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
109 #else
110 #define nfs4_label_maxsz 0
111 #endif
112 /* We support only one layout type per file system */
113 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
114 /* This is based on getfattr, which uses the most attributes: */
115 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
116 3 + 3 + 3 + nfs4_owner_maxsz + \
117 nfs4_group_maxsz + nfs4_label_maxsz + \
118 decode_mdsthreshold_maxsz))
119 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
120 nfs4_fattr_value_maxsz)
121 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
122 #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
123 1 + 2 + 1 + \
124 nfs4_owner_maxsz + \
125 nfs4_group_maxsz + \
126 nfs4_label_maxsz + \
127 4 + 4)
128 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
129 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
130 #define encode_restorefh_maxsz (op_encode_hdr_maxsz)
131 #define decode_restorefh_maxsz (op_decode_hdr_maxsz)
132 #define encode_fsinfo_maxsz (encode_getattr_maxsz)
133 /* The 5 accounts for the PNFS attributes, and assumes that at most three
134 * layout types will be returned.
135 */
136 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + \
137 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
138 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
139 #define decode_renew_maxsz (op_decode_hdr_maxsz)
140 #define encode_setclientid_maxsz \
141 (op_encode_hdr_maxsz + \
142 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
143 /* client name */ \
144 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
145 1 /* sc_prog */ + \
146 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
147 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
148 1) /* sc_cb_ident */
149 #define decode_setclientid_maxsz \
150 (op_decode_hdr_maxsz + \
151 2 /* clientid */ + \
152 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
153 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
154 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
155 #define encode_setclientid_confirm_maxsz \
156 (op_encode_hdr_maxsz + \
157 3 + (NFS4_VERIFIER_SIZE >> 2))
158 #define decode_setclientid_confirm_maxsz \
159 (op_decode_hdr_maxsz)
160 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
161 #define decode_lookup_maxsz (op_decode_hdr_maxsz)
162 #define encode_lookupp_maxsz (op_encode_hdr_maxsz)
163 #define decode_lookupp_maxsz (op_decode_hdr_maxsz)
164 #define encode_share_access_maxsz \
165 (2)
166 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
167 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
168 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
169 #define encode_open_maxsz (op_encode_hdr_maxsz + \
170 2 + encode_share_access_maxsz + 2 + \
171 open_owner_id_maxsz + \
172 encode_opentype_maxsz + \
173 encode_claim_null_maxsz)
174 #define decode_space_limit_maxsz (3)
175 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
176 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
177 decode_space_limit_maxsz + \
178 decode_ace_maxsz)
179 #define decode_change_info_maxsz (5)
180 #define decode_open_maxsz (op_decode_hdr_maxsz + \
181 decode_stateid_maxsz + \
182 decode_change_info_maxsz + 1 + \
183 nfs4_fattr_bitmap_maxsz + \
184 decode_delegation_maxsz)
185 #define encode_open_confirm_maxsz \
186 (op_encode_hdr_maxsz + \
187 encode_stateid_maxsz + 1)
188 #define decode_open_confirm_maxsz \
189 (op_decode_hdr_maxsz + \
190 decode_stateid_maxsz)
191 #define encode_open_downgrade_maxsz \
192 (op_encode_hdr_maxsz + \
193 encode_stateid_maxsz + 1 + \
194 encode_share_access_maxsz)
195 #define decode_open_downgrade_maxsz \
196 (op_decode_hdr_maxsz + \
197 decode_stateid_maxsz)
198 #define encode_close_maxsz (op_encode_hdr_maxsz + \
199 1 + encode_stateid_maxsz)
200 #define decode_close_maxsz (op_decode_hdr_maxsz + \
201 decode_stateid_maxsz)
202 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
203 encode_stateid_maxsz + \
204 encode_attrs_maxsz)
205 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
206 nfs4_fattr_bitmap_maxsz)
207 #define encode_read_maxsz (op_encode_hdr_maxsz + \
208 encode_stateid_maxsz + 3)
209 #define decode_read_maxsz (op_decode_hdr_maxsz + 2)
210 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
211 2 + encode_verifier_maxsz + 5 + \
212 nfs4_label_maxsz)
213 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
214 decode_verifier_maxsz)
215 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
216 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
217 #define encode_write_maxsz (op_encode_hdr_maxsz + \
218 encode_stateid_maxsz + 4)
219 #define decode_write_maxsz (op_decode_hdr_maxsz + \
220 2 + decode_verifier_maxsz)
221 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
222 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
223 decode_verifier_maxsz)
224 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
225 nfs4_name_maxsz)
226 #define decode_remove_maxsz (op_decode_hdr_maxsz + \
227 decode_change_info_maxsz)
228 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
229 2 * nfs4_name_maxsz)
230 #define decode_rename_maxsz (op_decode_hdr_maxsz + \
231 decode_change_info_maxsz + \
232 decode_change_info_maxsz)
233 #define encode_link_maxsz (op_encode_hdr_maxsz + \
234 nfs4_name_maxsz)
235 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
236 #define encode_lockowner_maxsz (7)
237 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
238 7 + \
239 1 + encode_stateid_maxsz + 1 + \
240 encode_lockowner_maxsz)
241 #define decode_lock_denied_maxsz \
242 (8 + decode_lockowner_maxsz)
243 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
244 decode_lock_denied_maxsz)
245 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
246 encode_lockowner_maxsz)
247 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
248 decode_lock_denied_maxsz)
249 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
250 encode_stateid_maxsz + \
251 4)
252 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
253 decode_stateid_maxsz)
254 #define encode_release_lockowner_maxsz \
255 (op_encode_hdr_maxsz + \
256 encode_lockowner_maxsz)
257 #define decode_release_lockowner_maxsz \
258 (op_decode_hdr_maxsz)
259 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
260 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
261 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
262 1 + nfs4_name_maxsz + \
263 1 + \
264 nfs4_fattr_maxsz)
265 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
266 #define encode_create_maxsz (op_encode_hdr_maxsz + \
267 1 + 2 + nfs4_name_maxsz + \
268 encode_attrs_maxsz)
269 #define decode_create_maxsz (op_decode_hdr_maxsz + \
270 decode_change_info_maxsz + \
271 nfs4_fattr_bitmap_maxsz)
272 #define encode_statfs_maxsz (encode_getattr_maxsz)
273 #define decode_statfs_maxsz (decode_getattr_maxsz)
274 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
275 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
276 #define encode_getacl_maxsz (encode_getattr_maxsz)
277 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
278 nfs4_fattr_bitmap_maxsz + 1)
279 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
280 encode_stateid_maxsz + 3)
281 #define decode_setacl_maxsz (decode_setattr_maxsz)
282 #define encode_fs_locations_maxsz \
283 (encode_getattr_maxsz)
284 #define decode_fs_locations_maxsz \
285 (0)
286 #define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
287 #define decode_secinfo_maxsz (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
288
289 #if defined(CONFIG_NFS_V4_1)
290 #define NFS4_MAX_MACHINE_NAME_LEN (64)
291 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
292 sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
293
294 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
295 encode_verifier_maxsz + \
296 1 /* co_ownerid.len */ + \
297 /* eia_clientowner */ \
298 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
299 1 /* flags */ + \
300 1 /* spa_how */ + \
301 /* max is SP4_MACH_CRED (for now) */ + \
302 1 + NFS4_OP_MAP_NUM_WORDS + \
303 1 + NFS4_OP_MAP_NUM_WORDS + \
304 1 /* implementation id array of size 1 */ + \
305 1 /* nii_domain */ + \
306 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
307 1 /* nii_name */ + \
308 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
309 3 /* nii_date */)
310 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
311 2 /* eir_clientid */ + \
312 1 /* eir_sequenceid */ + \
313 1 /* eir_flags */ + \
314 1 /* spr_how */ + \
315 /* max is SP4_MACH_CRED (for now) */ + \
316 1 + NFS4_OP_MAP_NUM_WORDS + \
317 1 + NFS4_OP_MAP_NUM_WORDS + \
318 2 /* eir_server_owner.so_minor_id */ + \
319 /* eir_server_owner.so_major_id<> */ \
320 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
321 /* eir_server_scope<> */ \
322 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
323 1 /* eir_server_impl_id array length */ + \
324 1 /* nii_domain */ + \
325 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
326 1 /* nii_name */ + \
327 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
328 3 /* nii_date */)
329 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
330 #define decode_channel_attrs_maxsz (6 + \
331 1 /* ca_rdma_ird.len */ + \
332 1 /* ca_rdma_ird */)
333 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \
334 2 /* csa_clientid */ + \
335 1 /* csa_sequence */ + \
336 1 /* csa_flags */ + \
337 encode_channel_attrs_maxsz + \
338 encode_channel_attrs_maxsz + \
339 1 /* csa_cb_program */ + \
340 1 /* csa_sec_parms.len (1) */ + \
341 1 /* cb_secflavor (AUTH_SYS) */ + \
342 1 /* stamp */ + \
343 1 /* machinename.len */ + \
344 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
345 1 /* uid */ + \
346 1 /* gid */ + \
347 1 /* gids.len (0) */)
348 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \
349 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
350 1 /* csr_sequence */ + \
351 1 /* csr_flags */ + \
352 decode_channel_attrs_maxsz + \
353 decode_channel_attrs_maxsz)
354 #define encode_bind_conn_to_session_maxsz (op_encode_hdr_maxsz + \
355 /* bctsa_sessid */ \
356 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
357 1 /* bctsa_dir */ + \
358 1 /* bctsa_use_conn_in_rdma_mode */)
359 #define decode_bind_conn_to_session_maxsz (op_decode_hdr_maxsz + \
360 /* bctsr_sessid */ \
361 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
362 1 /* bctsr_dir */ + \
363 1 /* bctsr_use_conn_in_rdma_mode */)
364 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
365 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
366 #define encode_destroy_clientid_maxsz (op_encode_hdr_maxsz + 2)
367 #define decode_destroy_clientid_maxsz (op_decode_hdr_maxsz)
368 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \
369 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
370 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \
371 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
372 #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
373 #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
374 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
375 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
376 1 /* layout type */ + \
377 1 /* maxcount */ + \
378 1 /* bitmap size */ + \
379 1 /* notification bitmap length */ + \
380 1 /* notification bitmap, word 0 */)
381 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
382 1 /* layout type */ + \
383 1 /* opaque devaddr4 length */ + \
384 /* devaddr4 payload is read into page */ \
385 1 /* notification bitmap length */ + \
386 1 /* notification bitmap, word 0 */)
387 #define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
388 encode_stateid_maxsz)
389 #define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
390 decode_stateid_maxsz + \
391 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
392 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
393 2 /* offset */ + \
394 2 /* length */ + \
395 1 /* reclaim */ + \
396 encode_stateid_maxsz + \
397 1 /* new offset (true) */ + \
398 2 /* last byte written */ + \
399 1 /* nt_timechanged (false) */ + \
400 1 /* layoutupdate4 layout type */ + \
401 1 /* layoutupdate4 opaqueue len */)
402 /* the actual content of layoutupdate4 should
403 be allocated by drivers and spliced in
404 using xdr_write_pages */
405 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
406 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
407 encode_stateid_maxsz + \
408 1 + \
409 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
410 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
411 1 + decode_stateid_maxsz)
412 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
413 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
414 #define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \
415 XDR_QUADLEN(NFS4_STATEID_SIZE))
416 #define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1)
417 #define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \
418 XDR_QUADLEN(NFS4_STATEID_SIZE))
419 #define decode_free_stateid_maxsz (op_decode_hdr_maxsz)
420 #else /* CONFIG_NFS_V4_1 */
421 #define encode_sequence_maxsz 0
422 #define decode_sequence_maxsz 0
423 #define encode_layoutreturn_maxsz 0
424 #define decode_layoutreturn_maxsz 0
425 #endif /* CONFIG_NFS_V4_1 */
426
427 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
428 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
429 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
430 encode_sequence_maxsz + \
431 encode_putfh_maxsz + \
432 encode_read_maxsz)
433 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
434 decode_sequence_maxsz + \
435 decode_putfh_maxsz + \
436 decode_read_maxsz)
437 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
438 encode_sequence_maxsz + \
439 encode_putfh_maxsz + \
440 encode_readlink_maxsz)
441 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
442 decode_sequence_maxsz + \
443 decode_putfh_maxsz + \
444 decode_readlink_maxsz)
445 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
446 encode_sequence_maxsz + \
447 encode_putfh_maxsz + \
448 encode_readdir_maxsz)
449 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
450 decode_sequence_maxsz + \
451 decode_putfh_maxsz + \
452 decode_readdir_maxsz)
453 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
454 encode_sequence_maxsz + \
455 encode_putfh_maxsz + \
456 encode_write_maxsz + \
457 encode_getattr_maxsz)
458 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
459 decode_sequence_maxsz + \
460 decode_putfh_maxsz + \
461 decode_write_maxsz + \
462 decode_getattr_maxsz)
463 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
464 encode_sequence_maxsz + \
465 encode_putfh_maxsz + \
466 encode_commit_maxsz)
467 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
468 decode_sequence_maxsz + \
469 decode_putfh_maxsz + \
470 decode_commit_maxsz)
471 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
472 encode_sequence_maxsz + \
473 encode_putfh_maxsz + \
474 encode_open_maxsz + \
475 encode_access_maxsz + \
476 encode_getfh_maxsz + \
477 encode_getattr_maxsz)
478 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
479 decode_sequence_maxsz + \
480 decode_putfh_maxsz + \
481 decode_open_maxsz + \
482 decode_access_maxsz + \
483 decode_getfh_maxsz + \
484 decode_getattr_maxsz)
485 #define NFS4_enc_open_confirm_sz \
486 (compound_encode_hdr_maxsz + \
487 encode_putfh_maxsz + \
488 encode_open_confirm_maxsz)
489 #define NFS4_dec_open_confirm_sz \
490 (compound_decode_hdr_maxsz + \
491 decode_putfh_maxsz + \
492 decode_open_confirm_maxsz)
493 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
494 encode_sequence_maxsz + \
495 encode_putfh_maxsz + \
496 encode_open_maxsz + \
497 encode_access_maxsz + \
498 encode_getattr_maxsz)
499 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
500 decode_sequence_maxsz + \
501 decode_putfh_maxsz + \
502 decode_open_maxsz + \
503 decode_access_maxsz + \
504 decode_getattr_maxsz)
505 #define NFS4_enc_open_downgrade_sz \
506 (compound_encode_hdr_maxsz + \
507 encode_sequence_maxsz + \
508 encode_putfh_maxsz + \
509 encode_layoutreturn_maxsz + \
510 encode_open_downgrade_maxsz)
511 #define NFS4_dec_open_downgrade_sz \
512 (compound_decode_hdr_maxsz + \
513 decode_sequence_maxsz + \
514 decode_putfh_maxsz + \
515 decode_layoutreturn_maxsz + \
516 decode_open_downgrade_maxsz)
517 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
518 encode_sequence_maxsz + \
519 encode_putfh_maxsz + \
520 encode_layoutreturn_maxsz + \
521 encode_close_maxsz + \
522 encode_getattr_maxsz)
523 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
524 decode_sequence_maxsz + \
525 decode_putfh_maxsz + \
526 decode_layoutreturn_maxsz + \
527 decode_close_maxsz + \
528 decode_getattr_maxsz)
529 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
530 encode_sequence_maxsz + \
531 encode_putfh_maxsz + \
532 encode_setattr_maxsz + \
533 encode_getattr_maxsz)
534 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
535 decode_sequence_maxsz + \
536 decode_putfh_maxsz + \
537 decode_setattr_maxsz + \
538 decode_getattr_maxsz)
539 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
540 encode_sequence_maxsz + \
541 encode_putfh_maxsz + \
542 encode_fsinfo_maxsz)
543 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
544 decode_sequence_maxsz + \
545 decode_putfh_maxsz + \
546 decode_fsinfo_maxsz)
547 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
548 encode_renew_maxsz)
549 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
550 decode_renew_maxsz)
551 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
552 encode_setclientid_maxsz)
553 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
554 decode_setclientid_maxsz)
555 #define NFS4_enc_setclientid_confirm_sz \
556 (compound_encode_hdr_maxsz + \
557 encode_setclientid_confirm_maxsz)
558 #define NFS4_dec_setclientid_confirm_sz \
559 (compound_decode_hdr_maxsz + \
560 decode_setclientid_confirm_maxsz)
561 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
562 encode_sequence_maxsz + \
563 encode_putfh_maxsz + \
564 encode_lock_maxsz)
565 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
566 decode_sequence_maxsz + \
567 decode_putfh_maxsz + \
568 decode_lock_maxsz)
569 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
570 encode_sequence_maxsz + \
571 encode_putfh_maxsz + \
572 encode_lockt_maxsz)
573 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
574 decode_sequence_maxsz + \
575 decode_putfh_maxsz + \
576 decode_lockt_maxsz)
577 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
578 encode_sequence_maxsz + \
579 encode_putfh_maxsz + \
580 encode_locku_maxsz)
581 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
582 decode_sequence_maxsz + \
583 decode_putfh_maxsz + \
584 decode_locku_maxsz)
585 #define NFS4_enc_release_lockowner_sz \
586 (compound_encode_hdr_maxsz + \
587 encode_lockowner_maxsz)
588 #define NFS4_dec_release_lockowner_sz \
589 (compound_decode_hdr_maxsz + \
590 decode_lockowner_maxsz)
591 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
592 encode_sequence_maxsz + \
593 encode_putfh_maxsz + \
594 encode_access_maxsz + \
595 encode_getattr_maxsz)
596 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
597 decode_sequence_maxsz + \
598 decode_putfh_maxsz + \
599 decode_access_maxsz + \
600 decode_getattr_maxsz)
601 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
602 encode_sequence_maxsz + \
603 encode_putfh_maxsz + \
604 encode_getattr_maxsz + \
605 encode_renew_maxsz)
606 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
607 decode_sequence_maxsz + \
608 decode_putfh_maxsz + \
609 decode_getattr_maxsz + \
610 decode_renew_maxsz)
611 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
612 encode_sequence_maxsz + \
613 encode_putfh_maxsz + \
614 encode_lookup_maxsz + \
615 encode_getattr_maxsz + \
616 encode_getfh_maxsz)
617 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
618 decode_sequence_maxsz + \
619 decode_putfh_maxsz + \
620 decode_lookup_maxsz + \
621 decode_getattr_maxsz + \
622 decode_getfh_maxsz)
623 #define NFS4_enc_lookupp_sz (compound_encode_hdr_maxsz + \
624 encode_sequence_maxsz + \
625 encode_putfh_maxsz + \
626 encode_lookupp_maxsz + \
627 encode_getattr_maxsz + \
628 encode_getfh_maxsz)
629 #define NFS4_dec_lookupp_sz (compound_decode_hdr_maxsz + \
630 decode_sequence_maxsz + \
631 decode_putfh_maxsz + \
632 decode_lookupp_maxsz + \
633 decode_getattr_maxsz + \
634 decode_getfh_maxsz)
635 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
636 encode_sequence_maxsz + \
637 encode_putrootfh_maxsz + \
638 encode_getattr_maxsz + \
639 encode_getfh_maxsz)
640 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
641 decode_sequence_maxsz + \
642 decode_putrootfh_maxsz + \
643 decode_getattr_maxsz + \
644 decode_getfh_maxsz)
645 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
646 encode_sequence_maxsz + \
647 encode_putfh_maxsz + \
648 encode_remove_maxsz)
649 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
650 decode_sequence_maxsz + \
651 decode_putfh_maxsz + \
652 decode_remove_maxsz)
653 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
654 encode_sequence_maxsz + \
655 encode_putfh_maxsz + \
656 encode_savefh_maxsz + \
657 encode_putfh_maxsz + \
658 encode_rename_maxsz)
659 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
660 decode_sequence_maxsz + \
661 decode_putfh_maxsz + \
662 decode_savefh_maxsz + \
663 decode_putfh_maxsz + \
664 decode_rename_maxsz)
665 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
666 encode_sequence_maxsz + \
667 encode_putfh_maxsz + \
668 encode_savefh_maxsz + \
669 encode_putfh_maxsz + \
670 encode_link_maxsz + \
671 encode_restorefh_maxsz + \
672 encode_getattr_maxsz)
673 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
674 decode_sequence_maxsz + \
675 decode_putfh_maxsz + \
676 decode_savefh_maxsz + \
677 decode_putfh_maxsz + \
678 decode_link_maxsz + \
679 decode_restorefh_maxsz + \
680 decode_getattr_maxsz)
681 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
682 encode_sequence_maxsz + \
683 encode_putfh_maxsz + \
684 encode_symlink_maxsz + \
685 encode_getattr_maxsz + \
686 encode_getfh_maxsz)
687 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
688 decode_sequence_maxsz + \
689 decode_putfh_maxsz + \
690 decode_symlink_maxsz + \
691 decode_getattr_maxsz + \
692 decode_getfh_maxsz)
693 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
694 encode_sequence_maxsz + \
695 encode_putfh_maxsz + \
696 encode_create_maxsz + \
697 encode_getfh_maxsz + \
698 encode_getattr_maxsz)
699 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
700 decode_sequence_maxsz + \
701 decode_putfh_maxsz + \
702 decode_create_maxsz + \
703 decode_getfh_maxsz + \
704 decode_getattr_maxsz)
705 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
706 encode_sequence_maxsz + \
707 encode_putfh_maxsz + \
708 encode_getattr_maxsz)
709 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
710 decode_sequence_maxsz + \
711 decode_putfh_maxsz + \
712 decode_getattr_maxsz)
713 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
714 encode_sequence_maxsz + \
715 encode_putfh_maxsz + \
716 encode_statfs_maxsz)
717 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
718 decode_sequence_maxsz + \
719 decode_putfh_maxsz + \
720 decode_statfs_maxsz)
721 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
722 encode_sequence_maxsz + \
723 encode_putfh_maxsz + \
724 encode_getattr_maxsz)
725 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
726 decode_sequence_maxsz + \
727 decode_putfh_maxsz + \
728 decode_getattr_maxsz)
729 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
730 encode_sequence_maxsz + \
731 encode_putfh_maxsz + \
732 encode_layoutreturn_maxsz + \
733 encode_delegreturn_maxsz + \
734 encode_getattr_maxsz)
735 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
736 decode_sequence_maxsz + \
737 decode_putfh_maxsz + \
738 decode_layoutreturn_maxsz + \
739 decode_delegreturn_maxsz + \
740 decode_getattr_maxsz)
741 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
742 encode_sequence_maxsz + \
743 encode_putfh_maxsz + \
744 encode_getacl_maxsz)
745 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
746 decode_sequence_maxsz + \
747 decode_putfh_maxsz + \
748 decode_getacl_maxsz)
749 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
750 encode_sequence_maxsz + \
751 encode_putfh_maxsz + \
752 encode_setacl_maxsz)
753 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
754 decode_sequence_maxsz + \
755 decode_putfh_maxsz + \
756 decode_setacl_maxsz)
757 #define NFS4_enc_fs_locations_sz \
758 (compound_encode_hdr_maxsz + \
759 encode_sequence_maxsz + \
760 encode_putfh_maxsz + \
761 encode_lookup_maxsz + \
762 encode_fs_locations_maxsz + \
763 encode_renew_maxsz)
764 #define NFS4_dec_fs_locations_sz \
765 (compound_decode_hdr_maxsz + \
766 decode_sequence_maxsz + \
767 decode_putfh_maxsz + \
768 decode_lookup_maxsz + \
769 decode_fs_locations_maxsz + \
770 decode_renew_maxsz)
771 #define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
772 encode_sequence_maxsz + \
773 encode_putfh_maxsz + \
774 encode_secinfo_maxsz)
775 #define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
776 decode_sequence_maxsz + \
777 decode_putfh_maxsz + \
778 decode_secinfo_maxsz)
779 #define NFS4_enc_fsid_present_sz \
780 (compound_encode_hdr_maxsz + \
781 encode_sequence_maxsz + \
782 encode_putfh_maxsz + \
783 encode_getfh_maxsz + \
784 encode_renew_maxsz)
785 #define NFS4_dec_fsid_present_sz \
786 (compound_decode_hdr_maxsz + \
787 decode_sequence_maxsz + \
788 decode_putfh_maxsz + \
789 decode_getfh_maxsz + \
790 decode_renew_maxsz)
791 #if defined(CONFIG_NFS_V4_1)
792 #define NFS4_enc_bind_conn_to_session_sz \
793 (compound_encode_hdr_maxsz + \
794 encode_bind_conn_to_session_maxsz)
795 #define NFS4_dec_bind_conn_to_session_sz \
796 (compound_decode_hdr_maxsz + \
797 decode_bind_conn_to_session_maxsz)
798 #define NFS4_enc_exchange_id_sz \
799 (compound_encode_hdr_maxsz + \
800 encode_exchange_id_maxsz)
801 #define NFS4_dec_exchange_id_sz \
802 (compound_decode_hdr_maxsz + \
803 decode_exchange_id_maxsz)
804 #define NFS4_enc_create_session_sz \
805 (compound_encode_hdr_maxsz + \
806 encode_create_session_maxsz)
807 #define NFS4_dec_create_session_sz \
808 (compound_decode_hdr_maxsz + \
809 decode_create_session_maxsz)
810 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
811 encode_destroy_session_maxsz)
812 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
813 decode_destroy_session_maxsz)
814 #define NFS4_enc_destroy_clientid_sz (compound_encode_hdr_maxsz + \
815 encode_destroy_clientid_maxsz)
816 #define NFS4_dec_destroy_clientid_sz (compound_decode_hdr_maxsz + \
817 decode_destroy_clientid_maxsz)
818 #define NFS4_enc_sequence_sz \
819 (compound_decode_hdr_maxsz + \
820 encode_sequence_maxsz)
821 #define NFS4_dec_sequence_sz \
822 (compound_decode_hdr_maxsz + \
823 decode_sequence_maxsz)
824 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
825 encode_sequence_maxsz + \
826 encode_putrootfh_maxsz + \
827 encode_fsinfo_maxsz)
828 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
829 decode_sequence_maxsz + \
830 decode_putrootfh_maxsz + \
831 decode_fsinfo_maxsz)
832 #define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
833 encode_sequence_maxsz + \
834 encode_reclaim_complete_maxsz)
835 #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
836 decode_sequence_maxsz + \
837 decode_reclaim_complete_maxsz)
838 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
839 encode_sequence_maxsz +\
840 encode_getdeviceinfo_maxsz)
841 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
842 decode_sequence_maxsz + \
843 decode_getdeviceinfo_maxsz)
844 #define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
845 encode_sequence_maxsz + \
846 encode_putfh_maxsz + \
847 encode_layoutget_maxsz)
848 #define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
849 decode_sequence_maxsz + \
850 decode_putfh_maxsz + \
851 decode_layoutget_maxsz)
852 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
853 encode_sequence_maxsz +\
854 encode_putfh_maxsz + \
855 encode_layoutcommit_maxsz + \
856 encode_getattr_maxsz)
857 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
858 decode_sequence_maxsz + \
859 decode_putfh_maxsz + \
860 decode_layoutcommit_maxsz + \
861 decode_getattr_maxsz)
862 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
863 encode_sequence_maxsz + \
864 encode_putfh_maxsz + \
865 encode_layoutreturn_maxsz)
866 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
867 decode_sequence_maxsz + \
868 decode_putfh_maxsz + \
869 decode_layoutreturn_maxsz)
870 #define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
871 encode_sequence_maxsz + \
872 encode_putrootfh_maxsz +\
873 encode_secinfo_no_name_maxsz)
874 #define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
875 decode_sequence_maxsz + \
876 decode_putrootfh_maxsz + \
877 decode_secinfo_no_name_maxsz)
878 #define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
879 encode_sequence_maxsz + \
880 encode_test_stateid_maxsz)
881 #define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
882 decode_sequence_maxsz + \
883 decode_test_stateid_maxsz)
884 #define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \
885 encode_sequence_maxsz + \
886 encode_free_stateid_maxsz)
887 #define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
888 decode_sequence_maxsz + \
889 decode_free_stateid_maxsz)
890
891 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
892 compound_encode_hdr_maxsz +
893 encode_sequence_maxsz +
894 encode_putfh_maxsz +
895 encode_getattr_maxsz) *
896 XDR_UNIT);
897
898 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
899 compound_decode_hdr_maxsz +
900 decode_sequence_maxsz +
901 decode_putfh_maxsz) *
902 XDR_UNIT);
903
904 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
905 compound_decode_hdr_maxsz +
906 decode_sequence_maxsz) *
907 XDR_UNIT);
908 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
909 #endif /* CONFIG_NFS_V4_1 */
910
911 static const umode_t nfs_type2fmt[] = {
912 [NF4BAD] = 0,
913 [NF4REG] = S_IFREG,
914 [NF4DIR] = S_IFDIR,
915 [NF4BLK] = S_IFBLK,
916 [NF4CHR] = S_IFCHR,
917 [NF4LNK] = S_IFLNK,
918 [NF4SOCK] = S_IFSOCK,
919 [NF4FIFO] = S_IFIFO,
920 [NF4ATTRDIR] = 0,
921 [NF4NAMEDATTR] = 0,
922 };
923
924 struct compound_hdr {
925 int32_t status;
926 uint32_t nops;
927 __be32 * nops_p;
928 uint32_t taglen;
929 char * tag;
930 uint32_t replen; /* expected reply words */
931 u32 minorversion;
932 };
933
934 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
935 {
936 __be32 *p = xdr_reserve_space(xdr, nbytes);
937 BUG_ON(!p);
938 return p;
939 }
940
941 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
942 {
943 WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
944 }
945
946 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
947 {
948 WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0);
949 }
950
951 static void encode_uint32(struct xdr_stream *xdr, u32 n)
952 {
953 WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
954 }
955
956 static void encode_uint64(struct xdr_stream *xdr, u64 n)
957 {
958 WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0);
959 }
960
961 static void encode_nfs4_seqid(struct xdr_stream *xdr,
962 const struct nfs_seqid *seqid)
963 {
964 if (seqid != NULL)
965 encode_uint32(xdr, seqid->sequence->counter);
966 else
967 encode_uint32(xdr, 0);
968 }
969
970 static void encode_compound_hdr(struct xdr_stream *xdr,
971 struct rpc_rqst *req,
972 struct compound_hdr *hdr)
973 {
974 __be32 *p;
975 struct rpc_auth *auth = req->rq_cred->cr_auth;
976
977 /* initialize running count of expected bytes in reply.
978 * NOTE: the replied tag SHOULD be the same is the one sent,
979 * but this is not required as a MUST for the server to do so. */
980 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
981
982 WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
983 encode_string(xdr, hdr->taglen, hdr->tag);
984 p = reserve_space(xdr, 8);
985 *p++ = cpu_to_be32(hdr->minorversion);
986 hdr->nops_p = p;
987 *p = cpu_to_be32(hdr->nops);
988 }
989
990 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
991 uint32_t replen,
992 struct compound_hdr *hdr)
993 {
994 encode_uint32(xdr, op);
995 hdr->nops++;
996 hdr->replen += replen;
997 }
998
999 static void encode_nops(struct compound_hdr *hdr)
1000 {
1001 WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
1002 *hdr->nops_p = htonl(hdr->nops);
1003 }
1004
1005 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1006 {
1007 encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1008 }
1009
1010 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1011 {
1012 encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1013 }
1014
1015 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1016 const struct nfs4_label *label,
1017 const umode_t *umask,
1018 const struct nfs_server *server,
1019 const uint32_t attrmask[])
1020 {
1021 char owner_name[IDMAP_NAMESZ];
1022 char owner_group[IDMAP_NAMESZ];
1023 int owner_namelen = 0;
1024 int owner_grouplen = 0;
1025 __be32 *p;
1026 unsigned i;
1027 uint32_t len = 0;
1028 uint32_t bmval_len;
1029 uint32_t bmval[3] = { 0 };
1030
1031 /*
1032 * We reserve enough space to write the entire attribute buffer at once.
1033 */
1034 if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1035 bmval[0] |= FATTR4_WORD0_SIZE;
1036 len += 8;
1037 }
1038 if (iap->ia_valid & ATTR_MODE) {
1039 if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1040 bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1041 len += 8;
1042 } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1043 bmval[1] |= FATTR4_WORD1_MODE;
1044 len += 4;
1045 }
1046 }
1047 if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1048 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1049 if (owner_namelen < 0) {
1050 dprintk("nfs: couldn't resolve uid %d to string\n",
1051 from_kuid(&init_user_ns, iap->ia_uid));
1052 /* XXX */
1053 strcpy(owner_name, "nobody");
1054 owner_namelen = sizeof("nobody") - 1;
1055 /* goto out; */
1056 }
1057 bmval[1] |= FATTR4_WORD1_OWNER;
1058 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1059 }
1060 if ((iap->ia_valid & ATTR_GID) &&
1061 (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1062 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1063 if (owner_grouplen < 0) {
1064 dprintk("nfs: couldn't resolve gid %d to string\n",
1065 from_kgid(&init_user_ns, iap->ia_gid));
1066 strcpy(owner_group, "nobody");
1067 owner_grouplen = sizeof("nobody") - 1;
1068 /* goto out; */
1069 }
1070 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1071 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1072 }
1073 if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1074 if (iap->ia_valid & ATTR_ATIME_SET) {
1075 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1076 len += 16;
1077 } else if (iap->ia_valid & ATTR_ATIME) {
1078 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1079 len += 4;
1080 }
1081 }
1082 if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1083 if (iap->ia_valid & ATTR_MTIME_SET) {
1084 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1085 len += 16;
1086 } else if (iap->ia_valid & ATTR_MTIME) {
1087 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1088 len += 4;
1089 }
1090 }
1091
1092 if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1093 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1094 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1095 }
1096
1097 if (bmval[2] != 0)
1098 bmval_len = 3;
1099 else if (bmval[1] != 0)
1100 bmval_len = 2;
1101 else
1102 bmval_len = 1;
1103
1104 p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1105
1106 *p++ = cpu_to_be32(bmval_len);
1107 for (i = 0; i < bmval_len; i++)
1108 *p++ = cpu_to_be32(bmval[i]);
1109 *p++ = cpu_to_be32(len);
1110
1111 if (bmval[0] & FATTR4_WORD0_SIZE)
1112 p = xdr_encode_hyper(p, iap->ia_size);
1113 if (bmval[1] & FATTR4_WORD1_MODE)
1114 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1115 if (bmval[1] & FATTR4_WORD1_OWNER)
1116 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1117 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1118 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1119 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1120 if (iap->ia_valid & ATTR_ATIME_SET) {
1121 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1122 p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1123 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1124 } else
1125 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1126 }
1127 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1128 if (iap->ia_valid & ATTR_MTIME_SET) {
1129 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1130 p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1131 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1132 } else
1133 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1134 }
1135 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1136 *p++ = cpu_to_be32(label->lfs);
1137 *p++ = cpu_to_be32(label->pi);
1138 *p++ = cpu_to_be32(label->len);
1139 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1140 }
1141 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1142 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1143 *p++ = cpu_to_be32(*umask);
1144 }
1145
1146 /* out: */
1147 }
1148
1149 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1150 {
1151 encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1152 encode_uint32(xdr, access);
1153 }
1154
1155 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1156 {
1157 encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1158 encode_nfs4_seqid(xdr, arg->seqid);
1159 encode_nfs4_stateid(xdr, &arg->stateid);
1160 }
1161
1162 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1163 {
1164 __be32 *p;
1165
1166 encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1167 p = reserve_space(xdr, 12);
1168 p = xdr_encode_hyper(p, args->offset);
1169 *p = cpu_to_be32(args->count);
1170 }
1171
1172 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1173 {
1174 __be32 *p;
1175
1176 encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1177 encode_uint32(xdr, create->ftype);
1178
1179 switch (create->ftype) {
1180 case NF4LNK:
1181 p = reserve_space(xdr, 4);
1182 *p = cpu_to_be32(create->u.symlink.len);
1183 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1184 create->u.symlink.len);
1185 xdr->buf->flags |= XDRBUF_WRITE;
1186 break;
1187
1188 case NF4BLK: case NF4CHR:
1189 p = reserve_space(xdr, 8);
1190 *p++ = cpu_to_be32(create->u.device.specdata1);
1191 *p = cpu_to_be32(create->u.device.specdata2);
1192 break;
1193
1194 default:
1195 break;
1196 }
1197
1198 encode_string(xdr, create->name->len, create->name->name);
1199 encode_attrs(xdr, create->attrs, create->label, &create->umask,
1200 create->server, create->server->attr_bitmask);
1201 }
1202
1203 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1204 {
1205 __be32 *p;
1206
1207 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1208 p = reserve_space(xdr, 8);
1209 *p++ = cpu_to_be32(1);
1210 *p = cpu_to_be32(bitmap);
1211 }
1212
1213 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1214 {
1215 __be32 *p;
1216
1217 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1218 p = reserve_space(xdr, 12);
1219 *p++ = cpu_to_be32(2);
1220 *p++ = cpu_to_be32(bm0);
1221 *p = cpu_to_be32(bm1);
1222 }
1223
1224 static void
1225 encode_getattr_three(struct xdr_stream *xdr,
1226 uint32_t bm0, uint32_t bm1, uint32_t bm2,
1227 struct compound_hdr *hdr)
1228 {
1229 __be32 *p;
1230
1231 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1232 if (bm2) {
1233 p = reserve_space(xdr, 16);
1234 *p++ = cpu_to_be32(3);
1235 *p++ = cpu_to_be32(bm0);
1236 *p++ = cpu_to_be32(bm1);
1237 *p = cpu_to_be32(bm2);
1238 } else if (bm1) {
1239 p = reserve_space(xdr, 12);
1240 *p++ = cpu_to_be32(2);
1241 *p++ = cpu_to_be32(bm0);
1242 *p = cpu_to_be32(bm1);
1243 } else {
1244 p = reserve_space(xdr, 8);
1245 *p++ = cpu_to_be32(1);
1246 *p = cpu_to_be32(bm0);
1247 }
1248 }
1249
1250 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1251 {
1252 encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1253 bitmask[1] & nfs4_fattr_bitmap[1],
1254 bitmask[2] & nfs4_fattr_bitmap[2],
1255 hdr);
1256 }
1257
1258 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1259 const u32 *open_bitmap,
1260 struct compound_hdr *hdr)
1261 {
1262 encode_getattr_three(xdr,
1263 bitmask[0] & open_bitmap[0],
1264 bitmask[1] & open_bitmap[1],
1265 bitmask[2] & open_bitmap[2],
1266 hdr);
1267 }
1268
1269 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1270 {
1271 encode_getattr_three(xdr,
1272 bitmask[0] & nfs4_fsinfo_bitmap[0],
1273 bitmask[1] & nfs4_fsinfo_bitmap[1],
1274 bitmask[2] & nfs4_fsinfo_bitmap[2],
1275 hdr);
1276 }
1277
1278 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1279 {
1280 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1281 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1282 }
1283
1284 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1285 {
1286 encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1287 }
1288
1289 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1290 {
1291 encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1292 encode_string(xdr, name->len, name->name);
1293 }
1294
1295 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1296 {
1297 if (fl->fl_type == F_RDLCK)
1298 return block ? NFS4_READW_LT : NFS4_READ_LT;
1299 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1300 }
1301
1302 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1303 {
1304 if (fl->fl_end == OFFSET_MAX)
1305 return ~(uint64_t)0;
1306 return fl->fl_end - fl->fl_start + 1;
1307 }
1308
1309 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1310 {
1311 __be32 *p;
1312
1313 p = reserve_space(xdr, 32);
1314 p = xdr_encode_hyper(p, lowner->clientid);
1315 *p++ = cpu_to_be32(20);
1316 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1317 *p++ = cpu_to_be32(lowner->s_dev);
1318 xdr_encode_hyper(p, lowner->id);
1319 }
1320
1321 /*
1322 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1323 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1324 */
1325 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1326 {
1327 __be32 *p;
1328
1329 encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1330 p = reserve_space(xdr, 28);
1331 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1332 *p++ = cpu_to_be32(args->reclaim);
1333 p = xdr_encode_hyper(p, args->fl->fl_start);
1334 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1335 *p = cpu_to_be32(args->new_lock_owner);
1336 if (args->new_lock_owner){
1337 encode_nfs4_seqid(xdr, args->open_seqid);
1338 encode_nfs4_stateid(xdr, &args->open_stateid);
1339 encode_nfs4_seqid(xdr, args->lock_seqid);
1340 encode_lockowner(xdr, &args->lock_owner);
1341 }
1342 else {
1343 encode_nfs4_stateid(xdr, &args->lock_stateid);
1344 encode_nfs4_seqid(xdr, args->lock_seqid);
1345 }
1346 }
1347
1348 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1349 {
1350 __be32 *p;
1351
1352 encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1353 p = reserve_space(xdr, 20);
1354 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1355 p = xdr_encode_hyper(p, args->fl->fl_start);
1356 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1357 encode_lockowner(xdr, &args->lock_owner);
1358 }
1359
1360 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1361 {
1362 __be32 *p;
1363
1364 encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1365 encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1366 encode_nfs4_seqid(xdr, args->seqid);
1367 encode_nfs4_stateid(xdr, &args->stateid);
1368 p = reserve_space(xdr, 16);
1369 p = xdr_encode_hyper(p, args->fl->fl_start);
1370 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1371 }
1372
1373 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1374 {
1375 encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1376 encode_lockowner(xdr, lowner);
1377 }
1378
1379 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1380 {
1381 encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1382 encode_string(xdr, name->len, name->name);
1383 }
1384
1385 static void encode_lookupp(struct xdr_stream *xdr, struct compound_hdr *hdr)
1386 {
1387 encode_op_hdr(xdr, OP_LOOKUPP, decode_lookupp_maxsz, hdr);
1388 }
1389
1390 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1391 {
1392 __be32 *p;
1393
1394 p = reserve_space(xdr, 8);
1395 *p++ = cpu_to_be32(share_access);
1396 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1397 }
1398
1399 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1400 {
1401 __be32 *p;
1402 /*
1403 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1404 * owner 4 = 32
1405 */
1406 encode_nfs4_seqid(xdr, arg->seqid);
1407 encode_share_access(xdr, arg->share_access);
1408 p = reserve_space(xdr, 36);
1409 p = xdr_encode_hyper(p, arg->clientid);
1410 *p++ = cpu_to_be32(24);
1411 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1412 *p++ = cpu_to_be32(arg->server->s_dev);
1413 *p++ = cpu_to_be32(arg->id.uniquifier);
1414 xdr_encode_hyper(p, arg->id.create_time);
1415 }
1416
1417 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1418 {
1419 __be32 *p;
1420
1421 p = reserve_space(xdr, 4);
1422 switch(arg->createmode) {
1423 case NFS4_CREATE_UNCHECKED:
1424 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1425 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1426 arg->server, arg->server->attr_bitmask);
1427 break;
1428 case NFS4_CREATE_GUARDED:
1429 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1430 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1431 arg->server, arg->server->attr_bitmask);
1432 break;
1433 case NFS4_CREATE_EXCLUSIVE:
1434 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1435 encode_nfs4_verifier(xdr, &arg->u.verifier);
1436 break;
1437 case NFS4_CREATE_EXCLUSIVE4_1:
1438 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1439 encode_nfs4_verifier(xdr, &arg->u.verifier);
1440 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1441 arg->server, arg->server->exclcreat_bitmask);
1442 }
1443 }
1444
1445 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1446 {
1447 __be32 *p;
1448
1449 p = reserve_space(xdr, 4);
1450 switch (arg->open_flags & O_CREAT) {
1451 case 0:
1452 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1453 break;
1454 default:
1455 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1456 encode_createmode(xdr, arg);
1457 }
1458 }
1459
1460 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1461 {
1462 __be32 *p;
1463
1464 p = reserve_space(xdr, 4);
1465 switch (delegation_type) {
1466 case 0:
1467 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1468 break;
1469 case FMODE_READ:
1470 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1471 break;
1472 case FMODE_WRITE|FMODE_READ:
1473 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1474 break;
1475 default:
1476 BUG();
1477 }
1478 }
1479
1480 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1481 {
1482 __be32 *p;
1483
1484 p = reserve_space(xdr, 4);
1485 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1486 encode_string(xdr, name->len, name->name);
1487 }
1488
1489 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1490 {
1491 __be32 *p;
1492
1493 p = reserve_space(xdr, 4);
1494 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1495 encode_delegation_type(xdr, type);
1496 }
1497
1498 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1499 {
1500 __be32 *p;
1501
1502 p = reserve_space(xdr, 4);
1503 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1504 encode_nfs4_stateid(xdr, stateid);
1505 encode_string(xdr, name->len, name->name);
1506 }
1507
1508 static inline void encode_claim_fh(struct xdr_stream *xdr)
1509 {
1510 __be32 *p;
1511
1512 p = reserve_space(xdr, 4);
1513 *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1514 }
1515
1516 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1517 {
1518 __be32 *p;
1519
1520 p = reserve_space(xdr, 4);
1521 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1522 encode_nfs4_stateid(xdr, stateid);
1523 }
1524
1525 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1526 {
1527 encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1528 encode_openhdr(xdr, arg);
1529 encode_opentype(xdr, arg);
1530 switch (arg->claim) {
1531 case NFS4_OPEN_CLAIM_NULL:
1532 encode_claim_null(xdr, arg->name);
1533 break;
1534 case NFS4_OPEN_CLAIM_PREVIOUS:
1535 encode_claim_previous(xdr, arg->u.delegation_type);
1536 break;
1537 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1538 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1539 break;
1540 case NFS4_OPEN_CLAIM_FH:
1541 encode_claim_fh(xdr);
1542 break;
1543 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1544 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1545 break;
1546 default:
1547 BUG();
1548 }
1549 }
1550
1551 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1552 {
1553 encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1554 encode_nfs4_stateid(xdr, arg->stateid);
1555 encode_nfs4_seqid(xdr, arg->seqid);
1556 }
1557
1558 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1559 {
1560 encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1561 encode_nfs4_stateid(xdr, &arg->stateid);
1562 encode_nfs4_seqid(xdr, arg->seqid);
1563 encode_share_access(xdr, arg->share_access);
1564 }
1565
1566 static void
1567 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1568 {
1569 encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1570 encode_string(xdr, fh->size, fh->data);
1571 }
1572
1573 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1574 {
1575 encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1576 }
1577
1578 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1579 struct compound_hdr *hdr)
1580 {
1581 __be32 *p;
1582
1583 encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1584 encode_nfs4_stateid(xdr, &args->stateid);
1585
1586 p = reserve_space(xdr, 12);
1587 p = xdr_encode_hyper(p, args->offset);
1588 *p = cpu_to_be32(args->count);
1589 }
1590
1591 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1592 {
1593 uint32_t attrs[3] = {
1594 FATTR4_WORD0_RDATTR_ERROR,
1595 FATTR4_WORD1_MOUNTED_ON_FILEID,
1596 };
1597 uint32_t dircount = readdir->count >> 1;
1598 __be32 *p, verf[2];
1599 uint32_t attrlen = 0;
1600 unsigned int i;
1601
1602 if (readdir->plus) {
1603 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1604 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1605 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1606 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1607 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1608 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1609 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1610 dircount >>= 1;
1611 }
1612 /* Use mounted_on_fileid only if the server supports it */
1613 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1614 attrs[0] |= FATTR4_WORD0_FILEID;
1615 for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1616 attrs[i] &= readdir->bitmask[i];
1617 if (attrs[i] != 0)
1618 attrlen = i+1;
1619 }
1620
1621 encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1622 encode_uint64(xdr, readdir->cookie);
1623 encode_nfs4_verifier(xdr, &readdir->verifier);
1624 p = reserve_space(xdr, 12 + (attrlen << 2));
1625 *p++ = cpu_to_be32(dircount);
1626 *p++ = cpu_to_be32(readdir->count);
1627 *p++ = cpu_to_be32(attrlen);
1628 for (i = 0; i < attrlen; i++)
1629 *p++ = cpu_to_be32(attrs[i]);
1630 memcpy(verf, readdir->verifier.data, sizeof(verf));
1631
1632 dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1633 __func__,
1634 (unsigned long long)readdir->cookie,
1635 verf[0], verf[1],
1636 attrs[0] & readdir->bitmask[0],
1637 attrs[1] & readdir->bitmask[1],
1638 attrs[2] & readdir->bitmask[2]);
1639 }
1640
1641 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1642 {
1643 encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1644 }
1645
1646 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1647 {
1648 encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1649 encode_string(xdr, name->len, name->name);
1650 }
1651
1652 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1653 {
1654 encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1655 encode_string(xdr, oldname->len, oldname->name);
1656 encode_string(xdr, newname->len, newname->name);
1657 }
1658
1659 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1660 struct compound_hdr *hdr)
1661 {
1662 encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1663 encode_uint64(xdr, clid);
1664 }
1665
1666 static void
1667 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1668 {
1669 encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1670 }
1671
1672 static void
1673 encode_setacl(struct xdr_stream *xdr, const struct nfs_setaclargs *arg,
1674 struct compound_hdr *hdr)
1675 {
1676 __be32 *p;
1677
1678 encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1679 encode_nfs4_stateid(xdr, &zero_stateid);
1680 p = reserve_space(xdr, 2*4);
1681 *p++ = cpu_to_be32(1);
1682 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1683 p = reserve_space(xdr, 4);
1684 *p = cpu_to_be32(arg->acl_len);
1685 xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1686 }
1687
1688 static void
1689 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1690 {
1691 encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1692 }
1693
1694 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1695 {
1696 encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1697 encode_nfs4_stateid(xdr, &arg->stateid);
1698 encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1699 server->attr_bitmask);
1700 }
1701
1702 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1703 {
1704 __be32 *p;
1705
1706 encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1707 encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1708
1709 encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1710 setclientid->sc_clnt->cl_owner_id);
1711 p = reserve_space(xdr, 4);
1712 *p = cpu_to_be32(setclientid->sc_prog);
1713 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1714 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1715 p = reserve_space(xdr, 4);
1716 *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1717 }
1718
1719 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1720 {
1721 encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1722 decode_setclientid_confirm_maxsz, hdr);
1723 encode_uint64(xdr, arg->clientid);
1724 encode_nfs4_verifier(xdr, &arg->confirm);
1725 }
1726
1727 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1728 struct compound_hdr *hdr)
1729 {
1730 __be32 *p;
1731
1732 encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1733 encode_nfs4_stateid(xdr, &args->stateid);
1734
1735 p = reserve_space(xdr, 16);
1736 p = xdr_encode_hyper(p, args->offset);
1737 *p++ = cpu_to_be32(args->stable);
1738 *p = cpu_to_be32(args->count);
1739
1740 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1741 }
1742
1743 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1744 {
1745 encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1746 encode_nfs4_stateid(xdr, stateid);
1747 }
1748
1749 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1750 {
1751 encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1752 encode_string(xdr, name->len, name->name);
1753 }
1754
1755 #if defined(CONFIG_NFS_V4_1)
1756 /* NFSv4.1 operations */
1757 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1758 const struct nfs41_bind_conn_to_session_args *args,
1759 struct compound_hdr *hdr)
1760 {
1761 __be32 *p;
1762
1763 encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1764 decode_bind_conn_to_session_maxsz, hdr);
1765 encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1766 p = xdr_reserve_space(xdr, 8);
1767 *p++ = cpu_to_be32(args->dir);
1768 *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1769 }
1770
1771 static void encode_op_map(struct xdr_stream *xdr, const struct nfs4_op_map *op_map)
1772 {
1773 unsigned int i;
1774 encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1775 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1776 encode_uint32(xdr, op_map->u.words[i]);
1777 }
1778
1779 static void encode_exchange_id(struct xdr_stream *xdr,
1780 const struct nfs41_exchange_id_args *args,
1781 struct compound_hdr *hdr)
1782 {
1783 __be32 *p;
1784 char impl_name[IMPL_NAME_LIMIT];
1785 int len = 0;
1786
1787 encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1788 encode_nfs4_verifier(xdr, &args->verifier);
1789
1790 encode_string(xdr, strlen(args->client->cl_owner_id),
1791 args->client->cl_owner_id);
1792
1793 encode_uint32(xdr, args->flags);
1794 encode_uint32(xdr, args->state_protect.how);
1795
1796 switch (args->state_protect.how) {
1797 case SP4_NONE:
1798 break;
1799 case SP4_MACH_CRED:
1800 encode_op_map(xdr, &args->state_protect.enforce);
1801 encode_op_map(xdr, &args->state_protect.allow);
1802 break;
1803 default:
1804 WARN_ON_ONCE(1);
1805 break;
1806 }
1807
1808 if (send_implementation_id &&
1809 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1810 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1811 <= sizeof(impl_name) + 1)
1812 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1813 utsname()->sysname, utsname()->release,
1814 utsname()->version, utsname()->machine);
1815
1816 if (len > 0) {
1817 encode_uint32(xdr, 1); /* implementation id array length=1 */
1818
1819 encode_string(xdr,
1820 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1821 CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1822 encode_string(xdr, len, impl_name);
1823 /* just send zeros for nii_date - the date is in nii_name */
1824 p = reserve_space(xdr, 12);
1825 p = xdr_encode_hyper(p, 0);
1826 *p = cpu_to_be32(0);
1827 } else
1828 encode_uint32(xdr, 0); /* implementation id array length=0 */
1829 }
1830
1831 static void encode_create_session(struct xdr_stream *xdr,
1832 const struct nfs41_create_session_args *args,
1833 struct compound_hdr *hdr)
1834 {
1835 __be32 *p;
1836 struct nfs_client *clp = args->client;
1837 struct rpc_clnt *clnt = clp->cl_rpcclient;
1838 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1839 u32 max_resp_sz_cached;
1840
1841 /*
1842 * Assumes OPEN is the biggest non-idempotent compound.
1843 * 2 is the verifier.
1844 */
1845 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1846 RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1847
1848 encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1849 p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1850 p = xdr_encode_hyper(p, args->clientid);
1851 *p++ = cpu_to_be32(args->seqid); /*Sequence id */
1852 *p++ = cpu_to_be32(args->flags); /*flags */
1853
1854 /* Fore Channel */
1855 *p++ = cpu_to_be32(0); /* header padding size */
1856 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1857 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1858 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1859 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1860 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1861 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1862
1863 /* Back Channel */
1864 *p++ = cpu_to_be32(0); /* header padding size */
1865 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1866 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1867 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1868 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1869 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1870 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1871
1872 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1873 *p++ = cpu_to_be32(1);
1874 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1875
1876 /* authsys_parms rfc1831 */
1877 *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1878 p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1879 *p++ = cpu_to_be32(0); /* UID */
1880 *p++ = cpu_to_be32(0); /* GID */
1881 *p = cpu_to_be32(0); /* No more gids */
1882 }
1883
1884 static void encode_destroy_session(struct xdr_stream *xdr,
1885 const struct nfs4_session *session,
1886 struct compound_hdr *hdr)
1887 {
1888 encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1889 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1890 }
1891
1892 static void encode_destroy_clientid(struct xdr_stream *xdr,
1893 uint64_t clientid,
1894 struct compound_hdr *hdr)
1895 {
1896 encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1897 encode_uint64(xdr, clientid);
1898 }
1899
1900 static void encode_reclaim_complete(struct xdr_stream *xdr,
1901 const struct nfs41_reclaim_complete_args *args,
1902 struct compound_hdr *hdr)
1903 {
1904 encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1905 encode_uint32(xdr, args->one_fs);
1906 }
1907 #endif /* CONFIG_NFS_V4_1 */
1908
1909 static void encode_sequence(struct xdr_stream *xdr,
1910 const struct nfs4_sequence_args *args,
1911 struct compound_hdr *hdr)
1912 {
1913 #if defined(CONFIG_NFS_V4_1)
1914 struct nfs4_session *session;
1915 struct nfs4_slot_table *tp;
1916 struct nfs4_slot *slot = args->sa_slot;
1917 __be32 *p;
1918
1919 tp = slot->table;
1920 session = tp->session;
1921 if (!session)
1922 return;
1923
1924 encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1925
1926 /*
1927 * Sessionid + seqid + slotid + max slotid + cache_this
1928 */
1929 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1930 "max_slotid=%d cache_this=%d\n",
1931 __func__,
1932 ((u32 *)session->sess_id.data)[0],
1933 ((u32 *)session->sess_id.data)[1],
1934 ((u32 *)session->sess_id.data)[2],
1935 ((u32 *)session->sess_id.data)[3],
1936 slot->seq_nr, slot->slot_nr,
1937 tp->highest_used_slotid, args->sa_cache_this);
1938 p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1939 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1940 *p++ = cpu_to_be32(slot->seq_nr);
1941 *p++ = cpu_to_be32(slot->slot_nr);
1942 *p++ = cpu_to_be32(tp->highest_used_slotid);
1943 *p = cpu_to_be32(args->sa_cache_this);
1944 #endif /* CONFIG_NFS_V4_1 */
1945 }
1946
1947 #ifdef CONFIG_NFS_V4_1
1948 static void
1949 encode_getdeviceinfo(struct xdr_stream *xdr,
1950 const struct nfs4_getdeviceinfo_args *args,
1951 struct compound_hdr *hdr)
1952 {
1953 __be32 *p;
1954
1955 encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1956 p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1957 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1958 NFS4_DEVICEID4_SIZE);
1959 *p++ = cpu_to_be32(args->pdev->layout_type);
1960 *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */
1961
1962 p = reserve_space(xdr, 4 + 4);
1963 *p++ = cpu_to_be32(1); /* bitmap length */
1964 *p++ = cpu_to_be32(args->notify_types);
1965 }
1966
1967 static void
1968 encode_layoutget(struct xdr_stream *xdr,
1969 const struct nfs4_layoutget_args *args,
1970 struct compound_hdr *hdr)
1971 {
1972 __be32 *p;
1973
1974 encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1975 p = reserve_space(xdr, 36);
1976 *p++ = cpu_to_be32(0); /* Signal layout available */
1977 *p++ = cpu_to_be32(args->type);
1978 *p++ = cpu_to_be32(args->range.iomode);
1979 p = xdr_encode_hyper(p, args->range.offset);
1980 p = xdr_encode_hyper(p, args->range.length);
1981 p = xdr_encode_hyper(p, args->minlength);
1982 encode_nfs4_stateid(xdr, &args->stateid);
1983 encode_uint32(xdr, args->maxcount);
1984
1985 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1986 __func__,
1987 args->type,
1988 args->range.iomode,
1989 (unsigned long)args->range.offset,
1990 (unsigned long)args->range.length,
1991 args->maxcount);
1992 }
1993
1994 static int
1995 encode_layoutcommit(struct xdr_stream *xdr,
1996 struct inode *inode,
1997 const struct nfs4_layoutcommit_args *args,
1998 struct compound_hdr *hdr)
1999 {
2000 __be32 *p;
2001
2002 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
2003 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
2004
2005 encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2006 p = reserve_space(xdr, 20);
2007 /* Only whole file layouts */
2008 p = xdr_encode_hyper(p, 0); /* offset */
2009 p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
2010 *p = cpu_to_be32(0); /* reclaim */
2011 encode_nfs4_stateid(xdr, &args->stateid);
2012 if (args->lastbytewritten != U64_MAX) {
2013 p = reserve_space(xdr, 20);
2014 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2015 p = xdr_encode_hyper(p, args->lastbytewritten);
2016 } else {
2017 p = reserve_space(xdr, 12);
2018 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2019 }
2020 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2021 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2022
2023 encode_uint32(xdr, args->layoutupdate_len);
2024 if (args->layoutupdate_pages)
2025 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2026 args->layoutupdate_len);
2027
2028 return 0;
2029 }
2030
2031 static void
2032 encode_layoutreturn(struct xdr_stream *xdr,
2033 const struct nfs4_layoutreturn_args *args,
2034 struct compound_hdr *hdr)
2035 {
2036 __be32 *p;
2037
2038 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2039 p = reserve_space(xdr, 16);
2040 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
2041 *p++ = cpu_to_be32(args->layout_type);
2042 *p++ = cpu_to_be32(args->range.iomode);
2043 *p = cpu_to_be32(RETURN_FILE);
2044 p = reserve_space(xdr, 16);
2045 p = xdr_encode_hyper(p, args->range.offset);
2046 p = xdr_encode_hyper(p, args->range.length);
2047 spin_lock(&args->inode->i_lock);
2048 encode_nfs4_stateid(xdr, &args->stateid);
2049 spin_unlock(&args->inode->i_lock);
2050 if (args->ld_private->ops && args->ld_private->ops->encode)
2051 args->ld_private->ops->encode(xdr, args, args->ld_private);
2052 else
2053 encode_uint32(xdr, 0);
2054 }
2055
2056 static int
2057 encode_secinfo_no_name(struct xdr_stream *xdr,
2058 const struct nfs41_secinfo_no_name_args *args,
2059 struct compound_hdr *hdr)
2060 {
2061 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2062 encode_uint32(xdr, args->style);
2063 return 0;
2064 }
2065
2066 static void encode_test_stateid(struct xdr_stream *xdr,
2067 const struct nfs41_test_stateid_args *args,
2068 struct compound_hdr *hdr)
2069 {
2070 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2071 encode_uint32(xdr, 1);
2072 encode_nfs4_stateid(xdr, args->stateid);
2073 }
2074
2075 static void encode_free_stateid(struct xdr_stream *xdr,
2076 const struct nfs41_free_stateid_args *args,
2077 struct compound_hdr *hdr)
2078 {
2079 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2080 encode_nfs4_stateid(xdr, &args->stateid);
2081 }
2082 #else
2083 static inline void
2084 encode_layoutreturn(struct xdr_stream *xdr,
2085 const struct nfs4_layoutreturn_args *args,
2086 struct compound_hdr *hdr)
2087 {
2088 }
2089 #endif /* CONFIG_NFS_V4_1 */
2090
2091 /*
2092 * END OF "GENERIC" ENCODE ROUTINES.
2093 */
2094
2095 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2096 {
2097 #if defined(CONFIG_NFS_V4_1)
2098 struct nfs4_session *session = args->sa_slot->table->session;
2099 if (session)
2100 return session->clp->cl_mvops->minor_version;
2101 #endif /* CONFIG_NFS_V4_1 */
2102 return 0;
2103 }
2104
2105 /*
2106 * Encode an ACCESS request
2107 */
2108 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2109 const void *data)
2110 {
2111 const struct nfs4_accessargs *args = data;
2112 struct compound_hdr hdr = {
2113 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2114 };
2115
2116 encode_compound_hdr(xdr, req, &hdr);
2117 encode_sequence(xdr, &args->seq_args, &hdr);
2118 encode_putfh(xdr, args->fh, &hdr);
2119 encode_access(xdr, args->access, &hdr);
2120 encode_getfattr(xdr, args->bitmask, &hdr);
2121 encode_nops(&hdr);
2122 }
2123
2124 /*
2125 * Encode LOOKUP request
2126 */
2127 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2128 const void *data)
2129 {
2130 const struct nfs4_lookup_arg *args = data;
2131 struct compound_hdr hdr = {
2132 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2133 };
2134
2135 encode_compound_hdr(xdr, req, &hdr);
2136 encode_sequence(xdr, &args->seq_args, &hdr);
2137 encode_putfh(xdr, args->dir_fh, &hdr);
2138 encode_lookup(xdr, args->name, &hdr);
2139 encode_getfh(xdr, &hdr);
2140 encode_getfattr(xdr, args->bitmask, &hdr);
2141 encode_nops(&hdr);
2142 }
2143
2144 /*
2145 * Encode LOOKUPP request
2146 */
2147 static void nfs4_xdr_enc_lookupp(struct rpc_rqst *req, struct xdr_stream *xdr,
2148 const void *data)
2149 {
2150 const struct nfs4_lookupp_arg *args = data;
2151 struct compound_hdr hdr = {
2152 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2153 };
2154
2155 encode_compound_hdr(xdr, req, &hdr);
2156 encode_sequence(xdr, &args->seq_args, &hdr);
2157 encode_putfh(xdr, args->fh, &hdr);
2158 encode_lookupp(xdr, &hdr);
2159 encode_getfh(xdr, &hdr);
2160 encode_getfattr(xdr, args->bitmask, &hdr);
2161 encode_nops(&hdr);
2162 }
2163
2164 /*
2165 * Encode LOOKUP_ROOT request
2166 */
2167 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2168 struct xdr_stream *xdr,
2169 const void *data)
2170 {
2171 const struct nfs4_lookup_root_arg *args = data;
2172 struct compound_hdr hdr = {
2173 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2174 };
2175
2176 encode_compound_hdr(xdr, req, &hdr);
2177 encode_sequence(xdr, &args->seq_args, &hdr);
2178 encode_putrootfh(xdr, &hdr);
2179 encode_getfh(xdr, &hdr);
2180 encode_getfattr(xdr, args->bitmask, &hdr);
2181 encode_nops(&hdr);
2182 }
2183
2184 /*
2185 * Encode REMOVE request
2186 */
2187 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2188 const void *data)
2189 {
2190 const struct nfs_removeargs *args = data;
2191 struct compound_hdr hdr = {
2192 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2193 };
2194
2195 encode_compound_hdr(xdr, req, &hdr);
2196 encode_sequence(xdr, &args->seq_args, &hdr);
2197 encode_putfh(xdr, args->fh, &hdr);
2198 encode_remove(xdr, &args->name, &hdr);
2199 encode_nops(&hdr);
2200 }
2201
2202 /*
2203 * Encode RENAME request
2204 */
2205 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2206 const void *data)
2207 {
2208 const struct nfs_renameargs *args = data;
2209 struct compound_hdr hdr = {
2210 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2211 };
2212
2213 encode_compound_hdr(xdr, req, &hdr);
2214 encode_sequence(xdr, &args->seq_args, &hdr);
2215 encode_putfh(xdr, args->old_dir, &hdr);
2216 encode_savefh(xdr, &hdr);
2217 encode_putfh(xdr, args->new_dir, &hdr);
2218 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2219 encode_nops(&hdr);
2220 }
2221
2222 /*
2223 * Encode LINK request
2224 */
2225 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2226 const void *data)
2227 {
2228 const struct nfs4_link_arg *args = data;
2229 struct compound_hdr hdr = {
2230 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2231 };
2232
2233 encode_compound_hdr(xdr, req, &hdr);
2234 encode_sequence(xdr, &args->seq_args, &hdr);
2235 encode_putfh(xdr, args->fh, &hdr);
2236 encode_savefh(xdr, &hdr);
2237 encode_putfh(xdr, args->dir_fh, &hdr);
2238 encode_link(xdr, args->name, &hdr);
2239 encode_restorefh(xdr, &hdr);
2240 encode_getfattr(xdr, args->bitmask, &hdr);
2241 encode_nops(&hdr);
2242 }
2243
2244 /*
2245 * Encode CREATE request
2246 */
2247 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2248 const void *data)
2249 {
2250 const struct nfs4_create_arg *args = data;
2251 struct compound_hdr hdr = {
2252 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2253 };
2254
2255 encode_compound_hdr(xdr, req, &hdr);
2256 encode_sequence(xdr, &args->seq_args, &hdr);
2257 encode_putfh(xdr, args->dir_fh, &hdr);
2258 encode_create(xdr, args, &hdr);
2259 encode_getfh(xdr, &hdr);
2260 encode_getfattr(xdr, args->bitmask, &hdr);
2261 encode_nops(&hdr);
2262 }
2263
2264 /*
2265 * Encode SYMLINK request
2266 */
2267 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2268 const void *data)
2269 {
2270 const struct nfs4_create_arg *args = data;
2271
2272 nfs4_xdr_enc_create(req, xdr, args);
2273 }
2274
2275 /*
2276 * Encode GETATTR request
2277 */
2278 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2279 const void *data)
2280 {
2281 const struct nfs4_getattr_arg *args = data;
2282 struct compound_hdr hdr = {
2283 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2284 };
2285
2286 encode_compound_hdr(xdr, req, &hdr);
2287 encode_sequence(xdr, &args->seq_args, &hdr);
2288 encode_putfh(xdr, args->fh, &hdr);
2289 encode_getfattr(xdr, args->bitmask, &hdr);
2290 encode_nops(&hdr);
2291 }
2292
2293 /*
2294 * Encode a CLOSE request
2295 */
2296 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2297 const void *data)
2298 {
2299 const struct nfs_closeargs *args = data;
2300 struct compound_hdr hdr = {
2301 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2302 };
2303
2304 encode_compound_hdr(xdr, req, &hdr);
2305 encode_sequence(xdr, &args->seq_args, &hdr);
2306 encode_putfh(xdr, args->fh, &hdr);
2307 if (args->lr_args)
2308 encode_layoutreturn(xdr, args->lr_args, &hdr);
2309 if (args->bitmask != NULL)
2310 encode_getfattr(xdr, args->bitmask, &hdr);
2311 encode_close(xdr, args, &hdr);
2312 encode_nops(&hdr);
2313 }
2314
2315 /*
2316 * Encode an OPEN request
2317 */
2318 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2319 const void *data)
2320 {
2321 const struct nfs_openargs *args = data;
2322 struct compound_hdr hdr = {
2323 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2324 };
2325
2326 encode_compound_hdr(xdr, req, &hdr);
2327 encode_sequence(xdr, &args->seq_args, &hdr);
2328 encode_putfh(xdr, args->fh, &hdr);
2329 encode_open(xdr, args, &hdr);
2330 encode_getfh(xdr, &hdr);
2331 if (args->access)
2332 encode_access(xdr, args->access, &hdr);
2333 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2334 encode_nops(&hdr);
2335 }
2336
2337 /*
2338 * Encode an OPEN_CONFIRM request
2339 */
2340 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2341 struct xdr_stream *xdr,
2342 const void *data)
2343 {
2344 const struct nfs_open_confirmargs *args = data;
2345 struct compound_hdr hdr = {
2346 .nops = 0,
2347 };
2348
2349 encode_compound_hdr(xdr, req, &hdr);
2350 encode_putfh(xdr, args->fh, &hdr);
2351 encode_open_confirm(xdr, args, &hdr);
2352 encode_nops(&hdr);
2353 }
2354
2355 /*
2356 * Encode an OPEN request with no attributes.
2357 */
2358 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2359 struct xdr_stream *xdr,
2360 const void *data)
2361 {
2362 const struct nfs_openargs *args = data;
2363 struct compound_hdr hdr = {
2364 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2365 };
2366
2367 encode_compound_hdr(xdr, req, &hdr);
2368 encode_sequence(xdr, &args->seq_args, &hdr);
2369 encode_putfh(xdr, args->fh, &hdr);
2370 encode_open(xdr, args, &hdr);
2371 if (args->access)
2372 encode_access(xdr, args->access, &hdr);
2373 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2374 encode_nops(&hdr);
2375 }
2376
2377 /*
2378 * Encode an OPEN_DOWNGRADE request
2379 */
2380 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2381 struct xdr_stream *xdr,
2382 const void *data)
2383 {
2384 const struct nfs_closeargs *args = data;
2385 struct compound_hdr hdr = {
2386 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2387 };
2388
2389 encode_compound_hdr(xdr, req, &hdr);
2390 encode_sequence(xdr, &args->seq_args, &hdr);
2391 encode_putfh(xdr, args->fh, &hdr);
2392 if (args->lr_args)
2393 encode_layoutreturn(xdr, args->lr_args, &hdr);
2394 encode_open_downgrade(xdr, args, &hdr);
2395 encode_nops(&hdr);
2396 }
2397
2398 /*
2399 * Encode a LOCK request
2400 */
2401 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2402 const void *data)
2403 {
2404 const struct nfs_lock_args *args = data;
2405 struct compound_hdr hdr = {
2406 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2407 };
2408
2409 encode_compound_hdr(xdr, req, &hdr);
2410 encode_sequence(xdr, &args->seq_args, &hdr);
2411 encode_putfh(xdr, args->fh, &hdr);
2412 encode_lock(xdr, args, &hdr);
2413 encode_nops(&hdr);
2414 }
2415
2416 /*
2417 * Encode a LOCKT request
2418 */
2419 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2420 const void *data)
2421 {
2422 const struct nfs_lockt_args *args = data;
2423 struct compound_hdr hdr = {
2424 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2425 };
2426
2427 encode_compound_hdr(xdr, req, &hdr);
2428 encode_sequence(xdr, &args->seq_args, &hdr);
2429 encode_putfh(xdr, args->fh, &hdr);
2430 encode_lockt(xdr, args, &hdr);
2431 encode_nops(&hdr);
2432 }
2433
2434 /*
2435 * Encode a LOCKU request
2436 */
2437 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2438 const void *data)
2439 {
2440 const struct nfs_locku_args *args = data;
2441 struct compound_hdr hdr = {
2442 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2443 };
2444
2445 encode_compound_hdr(xdr, req, &hdr);
2446 encode_sequence(xdr, &args->seq_args, &hdr);
2447 encode_putfh(xdr, args->fh, &hdr);
2448 encode_locku(xdr, args, &hdr);
2449 encode_nops(&hdr);
2450 }
2451
2452 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2453 struct xdr_stream *xdr,
2454 const void *data)
2455 {
2456 const struct nfs_release_lockowner_args *args = data;
2457 struct compound_hdr hdr = {
2458 .minorversion = 0,
2459 };
2460
2461 encode_compound_hdr(xdr, req, &hdr);
2462 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2463 encode_nops(&hdr);
2464 }
2465
2466 /*
2467 * Encode a READLINK request
2468 */
2469 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2470 const void *data)
2471 {
2472 const struct nfs4_readlink *args = data;
2473 struct compound_hdr hdr = {
2474 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2475 };
2476
2477 encode_compound_hdr(xdr, req, &hdr);
2478 encode_sequence(xdr, &args->seq_args, &hdr);
2479 encode_putfh(xdr, args->fh, &hdr);
2480 encode_readlink(xdr, args, req, &hdr);
2481
2482 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2483 args->pgbase, args->pglen);
2484 encode_nops(&hdr);
2485 }
2486
2487 /*
2488 * Encode a READDIR request
2489 */
2490 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2491 const void *data)
2492 {
2493 const struct nfs4_readdir_arg *args = data;
2494 struct compound_hdr hdr = {
2495 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2496 };
2497
2498 encode_compound_hdr(xdr, req, &hdr);
2499 encode_sequence(xdr, &args->seq_args, &hdr);
2500 encode_putfh(xdr, args->fh, &hdr);
2501 encode_readdir(xdr, args, req, &hdr);
2502
2503 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2504 args->pgbase, args->count);
2505 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2506 __func__, hdr.replen << 2, args->pages,
2507 args->pgbase, args->count);
2508 encode_nops(&hdr);
2509 }
2510
2511 /*
2512 * Encode a READ request
2513 */
2514 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2515 const void *data)
2516 {
2517 const struct nfs_pgio_args *args = data;
2518 struct compound_hdr hdr = {
2519 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2520 };
2521
2522 encode_compound_hdr(xdr, req, &hdr);
2523 encode_sequence(xdr, &args->seq_args, &hdr);
2524 encode_putfh(xdr, args->fh, &hdr);
2525 encode_read(xdr, args, &hdr);
2526
2527 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2528 args->pages, args->pgbase, args->count);
2529 req->rq_rcv_buf.flags |= XDRBUF_READ;
2530 encode_nops(&hdr);
2531 }
2532
2533 /*
2534 * Encode an SETATTR request
2535 */
2536 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2537 const void *data)
2538 {
2539 const struct nfs_setattrargs *args = data;
2540 struct compound_hdr hdr = {
2541 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2542 };
2543
2544 encode_compound_hdr(xdr, req, &hdr);
2545 encode_sequence(xdr, &args->seq_args, &hdr);
2546 encode_putfh(xdr, args->fh, &hdr);
2547 encode_setattr(xdr, args, args->server, &hdr);
2548 encode_getfattr(xdr, args->bitmask, &hdr);
2549 encode_nops(&hdr);
2550 }
2551
2552 /*
2553 * Encode a GETACL request
2554 */
2555 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2556 const void *data)
2557 {
2558 const struct nfs_getaclargs *args = data;
2559 struct compound_hdr hdr = {
2560 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2561 };
2562 uint32_t replen;
2563
2564 encode_compound_hdr(xdr, req, &hdr);
2565 encode_sequence(xdr, &args->seq_args, &hdr);
2566 encode_putfh(xdr, args->fh, &hdr);
2567 replen = hdr.replen + op_decode_hdr_maxsz;
2568 encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2569
2570 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2571 args->acl_pages, 0, args->acl_len);
2572
2573 encode_nops(&hdr);
2574 }
2575
2576 /*
2577 * Encode a WRITE request
2578 */
2579 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2580 const void *data)
2581 {
2582 const struct nfs_pgio_args *args = data;
2583 struct compound_hdr hdr = {
2584 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2585 };
2586
2587 encode_compound_hdr(xdr, req, &hdr);
2588 encode_sequence(xdr, &args->seq_args, &hdr);
2589 encode_putfh(xdr, args->fh, &hdr);
2590 encode_write(xdr, args, &hdr);
2591 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2592 if (args->bitmask)
2593 encode_getfattr(xdr, args->bitmask, &hdr);
2594 encode_nops(&hdr);
2595 }
2596
2597 /*
2598 * a COMMIT request
2599 */
2600 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2601 const void *data)
2602 {
2603 const struct nfs_commitargs *args = data;
2604 struct compound_hdr hdr = {
2605 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2606 };
2607
2608 encode_compound_hdr(xdr, req, &hdr);
2609 encode_sequence(xdr, &args->seq_args, &hdr);
2610 encode_putfh(xdr, args->fh, &hdr);
2611 encode_commit(xdr, args, &hdr);
2612 encode_nops(&hdr);
2613 }
2614
2615 /*
2616 * FSINFO request
2617 */
2618 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2619 const void *data)
2620 {
2621 const struct nfs4_fsinfo_arg *args = data;
2622 struct compound_hdr hdr = {
2623 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2624 };
2625
2626 encode_compound_hdr(xdr, req, &hdr);
2627 encode_sequence(xdr, &args->seq_args, &hdr);
2628 encode_putfh(xdr, args->fh, &hdr);
2629 encode_fsinfo(xdr, args->bitmask, &hdr);
2630 encode_nops(&hdr);
2631 }
2632
2633 /*
2634 * a PATHCONF request
2635 */
2636 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2637 const void *data)
2638 {
2639 const struct nfs4_pathconf_arg *args = data;
2640 struct compound_hdr hdr = {
2641 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2642 };
2643
2644 encode_compound_hdr(xdr, req, &hdr);
2645 encode_sequence(xdr, &args->seq_args, &hdr);
2646 encode_putfh(xdr, args->fh, &hdr);
2647 encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2648 &hdr);
2649 encode_nops(&hdr);
2650 }
2651
2652 /*
2653 * a STATFS request
2654 */
2655 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2656 const void *data)
2657 {
2658 const struct nfs4_statfs_arg *args = data;
2659 struct compound_hdr hdr = {
2660 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2661 };
2662
2663 encode_compound_hdr(xdr, req, &hdr);
2664 encode_sequence(xdr, &args->seq_args, &hdr);
2665 encode_putfh(xdr, args->fh, &hdr);
2666 encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2667 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2668 encode_nops(&hdr);
2669 }
2670
2671 /*
2672 * GETATTR_BITMAP request
2673 */
2674 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2675 struct xdr_stream *xdr,
2676 const void *data)
2677 {
2678 const struct nfs4_server_caps_arg *args = data;
2679 const u32 *bitmask = args->bitmask;
2680 struct compound_hdr hdr = {
2681 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2682 };
2683
2684 encode_compound_hdr(xdr, req, &hdr);
2685 encode_sequence(xdr, &args->seq_args, &hdr);
2686 encode_putfh(xdr, args->fhandle, &hdr);
2687 encode_getattr_three(xdr, bitmask[0], bitmask[1], bitmask[2], &hdr);
2688 encode_nops(&hdr);
2689 }
2690
2691 /*
2692 * a RENEW request
2693 */
2694 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2695 const void *data)
2696
2697 {
2698 const struct nfs_client *clp = data;
2699 struct compound_hdr hdr = {
2700 .nops = 0,
2701 };
2702
2703 encode_compound_hdr(xdr, req, &hdr);
2704 encode_renew(xdr, clp->cl_clientid, &hdr);
2705 encode_nops(&hdr);
2706 }
2707
2708 /*
2709 * a SETCLIENTID request
2710 */
2711 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2712 struct xdr_stream *xdr,
2713 const void *data)
2714 {
2715 const struct nfs4_setclientid *sc = data;
2716 struct compound_hdr hdr = {
2717 .nops = 0,
2718 };
2719
2720 encode_compound_hdr(xdr, req, &hdr);
2721 encode_setclientid(xdr, sc, &hdr);
2722 encode_nops(&hdr);
2723 }
2724
2725 /*
2726 * a SETCLIENTID_CONFIRM request
2727 */
2728 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2729 struct xdr_stream *xdr,
2730 const void *data)
2731 {
2732 const struct nfs4_setclientid_res *arg = data;
2733 struct compound_hdr hdr = {
2734 .nops = 0,
2735 };
2736
2737 encode_compound_hdr(xdr, req, &hdr);
2738 encode_setclientid_confirm(xdr, arg, &hdr);
2739 encode_nops(&hdr);
2740 }
2741
2742 /*
2743 * DELEGRETURN request
2744 */
2745 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2746 struct xdr_stream *xdr,
2747 const void *data)
2748 {
2749 const struct nfs4_delegreturnargs *args = data;
2750 struct compound_hdr hdr = {
2751 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2752 };
2753
2754 encode_compound_hdr(xdr, req, &hdr);
2755 encode_sequence(xdr, &args->seq_args, &hdr);
2756 encode_putfh(xdr, args->fhandle, &hdr);
2757 if (args->lr_args)
2758 encode_layoutreturn(xdr, args->lr_args, &hdr);
2759 if (args->bitmask)
2760 encode_getfattr(xdr, args->bitmask, &hdr);
2761 encode_delegreturn(xdr, args->stateid, &hdr);
2762 encode_nops(&hdr);
2763 }
2764
2765 /*
2766 * Encode FS_LOCATIONS request
2767 */
2768 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2769 struct xdr_stream *xdr,
2770 const void *data)
2771 {
2772 const struct nfs4_fs_locations_arg *args = data;
2773 struct compound_hdr hdr = {
2774 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2775 };
2776 uint32_t replen;
2777
2778 encode_compound_hdr(xdr, req, &hdr);
2779 encode_sequence(xdr, &args->seq_args, &hdr);
2780 if (args->migration) {
2781 encode_putfh(xdr, args->fh, &hdr);
2782 replen = hdr.replen;
2783 encode_fs_locations(xdr, args->bitmask, &hdr);
2784 if (args->renew)
2785 encode_renew(xdr, args->clientid, &hdr);
2786 } else {
2787 encode_putfh(xdr, args->dir_fh, &hdr);
2788 encode_lookup(xdr, args->name, &hdr);
2789 replen = hdr.replen;
2790 encode_fs_locations(xdr, args->bitmask, &hdr);
2791 }
2792
2793 /* Set up reply kvec to capture returned fs_locations array. */
2794 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2795 (struct page **)&args->page, 0, PAGE_SIZE);
2796 encode_nops(&hdr);
2797 }
2798
2799 /*
2800 * Encode SECINFO request
2801 */
2802 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2803 struct xdr_stream *xdr,
2804 const void *data)
2805 {
2806 const struct nfs4_secinfo_arg *args = data;
2807 struct compound_hdr hdr = {
2808 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2809 };
2810
2811 encode_compound_hdr(xdr, req, &hdr);
2812 encode_sequence(xdr, &args->seq_args, &hdr);
2813 encode_putfh(xdr, args->dir_fh, &hdr);
2814 encode_secinfo(xdr, args->name, &hdr);
2815 encode_nops(&hdr);
2816 }
2817
2818 /*
2819 * Encode FSID_PRESENT request
2820 */
2821 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2822 struct xdr_stream *xdr,
2823 const void *data)
2824 {
2825 const struct nfs4_fsid_present_arg *args = data;
2826 struct compound_hdr hdr = {
2827 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2828 };
2829
2830 encode_compound_hdr(xdr, req, &hdr);
2831 encode_sequence(xdr, &args->seq_args, &hdr);
2832 encode_putfh(xdr, args->fh, &hdr);
2833 encode_getfh(xdr, &hdr);
2834 if (args->renew)
2835 encode_renew(xdr, args->clientid, &hdr);
2836 encode_nops(&hdr);
2837 }
2838
2839 #if defined(CONFIG_NFS_V4_1)
2840 /*
2841 * BIND_CONN_TO_SESSION request
2842 */
2843 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2844 struct xdr_stream *xdr,
2845 const void *data)
2846 {
2847 const struct nfs41_bind_conn_to_session_args *args = data;
2848 struct compound_hdr hdr = {
2849 .minorversion = args->client->cl_mvops->minor_version,
2850 };
2851
2852 encode_compound_hdr(xdr, req, &hdr);
2853 encode_bind_conn_to_session(xdr, args, &hdr);
2854 encode_nops(&hdr);
2855 }
2856
2857 /*
2858 * EXCHANGE_ID request
2859 */
2860 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2861 struct xdr_stream *xdr,
2862 const void *data)
2863 {
2864 const struct nfs41_exchange_id_args *args = data;
2865 struct compound_hdr hdr = {
2866 .minorversion = args->client->cl_mvops->minor_version,
2867 };
2868
2869 encode_compound_hdr(xdr, req, &hdr);
2870 encode_exchange_id(xdr, args, &hdr);
2871 encode_nops(&hdr);
2872 }
2873
2874 /*
2875 * a CREATE_SESSION request
2876 */
2877 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2878 struct xdr_stream *xdr,
2879 const void *data)
2880 {
2881 const struct nfs41_create_session_args *args = data;
2882 struct compound_hdr hdr = {
2883 .minorversion = args->client->cl_mvops->minor_version,
2884 };
2885
2886 encode_compound_hdr(xdr, req, &hdr);
2887 encode_create_session(xdr, args, &hdr);
2888 encode_nops(&hdr);
2889 }
2890
2891 /*
2892 * a DESTROY_SESSION request
2893 */
2894 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2895 struct xdr_stream *xdr,
2896 const void *data)
2897 {
2898 const struct nfs4_session *session = data;
2899 struct compound_hdr hdr = {
2900 .minorversion = session->clp->cl_mvops->minor_version,
2901 };
2902
2903 encode_compound_hdr(xdr, req, &hdr);
2904 encode_destroy_session(xdr, session, &hdr);
2905 encode_nops(&hdr);
2906 }
2907
2908 /*
2909 * a DESTROY_CLIENTID request
2910 */
2911 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2912 struct xdr_stream *xdr,
2913 const void *data)
2914 {
2915 const struct nfs_client *clp = data;
2916 struct compound_hdr hdr = {
2917 .minorversion = clp->cl_mvops->minor_version,
2918 };
2919
2920 encode_compound_hdr(xdr, req, &hdr);
2921 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2922 encode_nops(&hdr);
2923 }
2924
2925 /*
2926 * a SEQUENCE request
2927 */
2928 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2929 const void *data)
2930 {
2931 const struct nfs4_sequence_args *args = data;
2932 struct compound_hdr hdr = {
2933 .minorversion = nfs4_xdr_minorversion(args),
2934 };
2935
2936 encode_compound_hdr(xdr, req, &hdr);
2937 encode_sequence(xdr, args, &hdr);
2938 encode_nops(&hdr);
2939 }
2940
2941 /*
2942 * a GET_LEASE_TIME request
2943 */
2944 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2945 struct xdr_stream *xdr,
2946 const void *data)
2947 {
2948 const struct nfs4_get_lease_time_args *args = data;
2949 struct compound_hdr hdr = {
2950 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2951 };
2952 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2953
2954 encode_compound_hdr(xdr, req, &hdr);
2955 encode_sequence(xdr, &args->la_seq_args, &hdr);
2956 encode_putrootfh(xdr, &hdr);
2957 encode_fsinfo(xdr, lease_bitmap, &hdr);
2958 encode_nops(&hdr);
2959 }
2960
2961 /*
2962 * a RECLAIM_COMPLETE request
2963 */
2964 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2965 struct xdr_stream *xdr,
2966 const void *data)
2967 {
2968 const struct nfs41_reclaim_complete_args *args = data;
2969 struct compound_hdr hdr = {
2970 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2971 };
2972
2973 encode_compound_hdr(xdr, req, &hdr);
2974 encode_sequence(xdr, &args->seq_args, &hdr);
2975 encode_reclaim_complete(xdr, args, &hdr);
2976 encode_nops(&hdr);
2977 }
2978
2979 /*
2980 * Encode GETDEVICEINFO request
2981 */
2982 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2983 struct xdr_stream *xdr,
2984 const void *data)
2985 {
2986 const struct nfs4_getdeviceinfo_args *args = data;
2987 struct compound_hdr hdr = {
2988 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2989 };
2990
2991 encode_compound_hdr(xdr, req, &hdr);
2992 encode_sequence(xdr, &args->seq_args, &hdr);
2993 encode_getdeviceinfo(xdr, args, &hdr);
2994
2995 /* set up reply kvec. Subtract notification bitmap max size (2)
2996 * so that notification bitmap is put in xdr_buf tail */
2997 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2998 args->pdev->pages, args->pdev->pgbase,
2999 args->pdev->pglen);
3000
3001 encode_nops(&hdr);
3002 }
3003
3004 /*
3005 * Encode LAYOUTGET request
3006 */
3007 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
3008 struct xdr_stream *xdr,
3009 const void *data)
3010 {
3011 const struct nfs4_layoutget_args *args = data;
3012 struct compound_hdr hdr = {
3013 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3014 };
3015
3016 encode_compound_hdr(xdr, req, &hdr);
3017 encode_sequence(xdr, &args->seq_args, &hdr);
3018 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3019 encode_layoutget(xdr, args, &hdr);
3020
3021 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
3022 args->layout.pages, 0, args->layout.pglen);
3023
3024 encode_nops(&hdr);
3025 }
3026
3027 /*
3028 * Encode LAYOUTCOMMIT request
3029 */
3030 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3031 struct xdr_stream *xdr,
3032 const void *priv)
3033 {
3034 const struct nfs4_layoutcommit_args *args = priv;
3035 struct nfs4_layoutcommit_data *data =
3036 container_of(args, struct nfs4_layoutcommit_data, args);
3037 struct compound_hdr hdr = {
3038 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3039 };
3040
3041 encode_compound_hdr(xdr, req, &hdr);
3042 encode_sequence(xdr, &args->seq_args, &hdr);
3043 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3044 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3045 encode_getfattr(xdr, args->bitmask, &hdr);
3046 encode_nops(&hdr);
3047 }
3048
3049 /*
3050 * Encode LAYOUTRETURN request
3051 */
3052 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3053 struct xdr_stream *xdr,
3054 const void *data)
3055 {
3056 const struct nfs4_layoutreturn_args *args = data;
3057 struct compound_hdr hdr = {
3058 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3059 };
3060
3061 encode_compound_hdr(xdr, req, &hdr);
3062 encode_sequence(xdr, &args->seq_args, &hdr);
3063 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3064 encode_layoutreturn(xdr, args, &hdr);
3065 encode_nops(&hdr);
3066 }
3067
3068 /*
3069 * Encode SECINFO_NO_NAME request
3070 */
3071 static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3072 struct xdr_stream *xdr,
3073 const void *data)
3074 {
3075 const struct nfs41_secinfo_no_name_args *args = data;
3076 struct compound_hdr hdr = {
3077 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3078 };
3079
3080 encode_compound_hdr(xdr, req, &hdr);
3081 encode_sequence(xdr, &args->seq_args, &hdr);
3082 encode_putrootfh(xdr, &hdr);
3083 encode_secinfo_no_name(xdr, args, &hdr);
3084 encode_nops(&hdr);
3085 }
3086
3087 /*
3088 * Encode TEST_STATEID request
3089 */
3090 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3091 struct xdr_stream *xdr,
3092 const void *data)
3093 {
3094 const struct nfs41_test_stateid_args *args = data;
3095 struct compound_hdr hdr = {
3096 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3097 };
3098
3099 encode_compound_hdr(xdr, req, &hdr);
3100 encode_sequence(xdr, &args->seq_args, &hdr);
3101 encode_test_stateid(xdr, args, &hdr);
3102 encode_nops(&hdr);
3103 }
3104
3105 /*
3106 * Encode FREE_STATEID request
3107 */
3108 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3109 struct xdr_stream *xdr,
3110 const void *data)
3111 {
3112 const struct nfs41_free_stateid_args *args = data;
3113 struct compound_hdr hdr = {
3114 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3115 };
3116
3117 encode_compound_hdr(xdr, req, &hdr);
3118 encode_sequence(xdr, &args->seq_args, &hdr);
3119 encode_free_stateid(xdr, args, &hdr);
3120 encode_nops(&hdr);
3121 }
3122 #endif /* CONFIG_NFS_V4_1 */
3123
3124 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3125 {
3126 dprintk("nfs: %s: prematurely hit end of receive buffer. "
3127 "Remaining buffer length is %tu words.\n",
3128 func, xdr->end - xdr->p);
3129 }
3130
3131 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3132 {
3133 ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3134 NFS4_OPAQUE_LIMIT);
3135 if (unlikely(ret < 0)) {
3136 if (ret == -EBADMSG)
3137 print_overflow_msg(__func__, xdr);
3138 return -EIO;
3139 }
3140 *len = ret;
3141 return 0;
3142 }
3143
3144 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3145 {
3146 __be32 *p;
3147
3148 p = xdr_inline_decode(xdr, 8);
3149 if (unlikely(!p))
3150 goto out_overflow;
3151 hdr->status = be32_to_cpup(p++);
3152 hdr->taglen = be32_to_cpup(p);
3153
3154 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3155 if (unlikely(!p))
3156 goto out_overflow;
3157 hdr->tag = (char *)p;
3158 p += XDR_QUADLEN(hdr->taglen);
3159 hdr->nops = be32_to_cpup(p);
3160 if (unlikely(hdr->nops < 1))
3161 return nfs4_stat_to_errno(hdr->status);
3162 return 0;
3163 out_overflow:
3164 print_overflow_msg(__func__, xdr);
3165 return -EIO;
3166 }
3167
3168 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3169 int *nfs_retval)
3170 {
3171 __be32 *p;
3172 uint32_t opnum;
3173 int32_t nfserr;
3174
3175 p = xdr_inline_decode(xdr, 8);
3176 if (unlikely(!p))
3177 goto out_overflow;
3178 opnum = be32_to_cpup(p++);
3179 if (unlikely(opnum != expected))
3180 goto out_bad_operation;
3181 nfserr = be32_to_cpup(p);
3182 if (nfserr == NFS_OK)
3183 *nfs_retval = 0;
3184 else
3185 *nfs_retval = nfs4_stat_to_errno(nfserr);
3186 return true;
3187 out_bad_operation:
3188 dprintk("nfs: Server returned operation"
3189 " %d but we issued a request for %d\n",
3190 opnum, expected);
3191 *nfs_retval = -EREMOTEIO;
3192 return false;
3193 out_overflow:
3194 print_overflow_msg(__func__, xdr);
3195 *nfs_retval = -EIO;
3196 return false;
3197 }
3198
3199 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3200 {
3201 int retval;
3202
3203 __decode_op_hdr(xdr, expected, &retval);
3204 return retval;
3205 }
3206
3207 /* Dummy routine */
3208 static int decode_ace(struct xdr_stream *xdr, void *ace)
3209 {
3210 __be32 *p;
3211 unsigned int strlen;
3212 char *str;
3213
3214 p = xdr_inline_decode(xdr, 12);
3215 if (likely(p))
3216 return decode_opaque_inline(xdr, &strlen, &str);
3217 print_overflow_msg(__func__, xdr);
3218 return -EIO;
3219 }
3220
3221 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3222 {
3223 uint32_t bmlen;
3224 __be32 *p;
3225
3226 p = xdr_inline_decode(xdr, 4);
3227 if (unlikely(!p))
3228 goto out_overflow;
3229 bmlen = be32_to_cpup(p);
3230
3231 bitmap[0] = bitmap[1] = bitmap[2] = 0;
3232 p = xdr_inline_decode(xdr, (bmlen << 2));
3233 if (unlikely(!p))
3234 goto out_overflow;
3235 if (bmlen > 0) {
3236 bitmap[0] = be32_to_cpup(p++);
3237 if (bmlen > 1) {
3238 bitmap[1] = be32_to_cpup(p++);
3239 if (bmlen > 2)
3240 bitmap[2] = be32_to_cpup(p);
3241 }
3242 }
3243 return 0;
3244 out_overflow:
3245 print_overflow_msg(__func__, xdr);
3246 return -EIO;
3247 }
3248
3249 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3250 {
3251 __be32 *p;
3252
3253 p = xdr_inline_decode(xdr, 4);
3254 if (unlikely(!p))
3255 goto out_overflow;
3256 *attrlen = be32_to_cpup(p);
3257 *savep = xdr_stream_pos(xdr);
3258 return 0;
3259 out_overflow:
3260 print_overflow_msg(__func__, xdr);
3261 return -EIO;
3262 }
3263
3264 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3265 {
3266 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3267 int ret;
3268 ret = decode_attr_bitmap(xdr, bitmask);
3269 if (unlikely(ret < 0))
3270 return ret;
3271 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3272 } else
3273 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3274 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3275 bitmask[0], bitmask[1], bitmask[2]);
3276 return 0;
3277 }
3278
3279 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3280 {
3281 __be32 *p;
3282 int ret = 0;
3283
3284 *type = 0;
3285 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3286 return -EIO;
3287 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3288 p = xdr_inline_decode(xdr, 4);
3289 if (unlikely(!p))
3290 goto out_overflow;
3291 *type = be32_to_cpup(p);
3292 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3293 dprintk("%s: bad type %d\n", __func__, *type);
3294 return -EIO;
3295 }
3296 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3297 ret = NFS_ATTR_FATTR_TYPE;
3298 }
3299 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3300 return ret;
3301 out_overflow:
3302 print_overflow_msg(__func__, xdr);
3303 return -EIO;
3304 }
3305
3306 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3307 uint32_t *bitmap, uint32_t *type)
3308 {
3309 __be32 *p;
3310
3311 *type = 0;
3312 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3313 return -EIO;
3314 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3315 p = xdr_inline_decode(xdr, 4);
3316 if (unlikely(!p))
3317 goto out_overflow;
3318 *type = be32_to_cpup(p);
3319 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3320 }
3321 dprintk("%s: expire type=0x%x\n", __func__, *type);
3322 return 0;
3323 out_overflow:
3324 print_overflow_msg(__func__, xdr);
3325 return -EIO;
3326 }
3327
3328 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3329 {
3330 __be32 *p;
3331 int ret = 0;
3332
3333 *change = 0;
3334 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3335 return -EIO;
3336 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3337 p = xdr_inline_decode(xdr, 8);
3338 if (unlikely(!p))
3339 goto out_overflow;
3340 xdr_decode_hyper(p, change);
3341 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3342 ret = NFS_ATTR_FATTR_CHANGE;
3343 }
3344 dprintk("%s: change attribute=%Lu\n", __func__,
3345 (unsigned long long)*change);
3346 return ret;
3347 out_overflow:
3348 print_overflow_msg(__func__, xdr);
3349 return -EIO;
3350 }
3351
3352 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3353 {
3354 __be32 *p;
3355 int ret = 0;
3356
3357 *size = 0;
3358 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3359 return -EIO;
3360 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3361 p = xdr_inline_decode(xdr, 8);
3362 if (unlikely(!p))
3363 goto out_overflow;
3364 xdr_decode_hyper(p, size);
3365 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3366 ret = NFS_ATTR_FATTR_SIZE;
3367 }
3368 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3369 return ret;
3370 out_overflow:
3371 print_overflow_msg(__func__, xdr);
3372 return -EIO;
3373 }
3374
3375 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3376 {
3377 __be32 *p;
3378
3379 *res = 0;
3380 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3381 return -EIO;
3382 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3383 p = xdr_inline_decode(xdr, 4);
3384 if (unlikely(!p))
3385 goto out_overflow;
3386 *res = be32_to_cpup(p);
3387 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3388 }
3389 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3390 return 0;
3391 out_overflow:
3392 print_overflow_msg(__func__, xdr);
3393 return -EIO;
3394 }
3395
3396 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3397 {
3398 __be32 *p;
3399
3400 *res = 0;
3401 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3402 return -EIO;
3403 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3404 p = xdr_inline_decode(xdr, 4);
3405 if (unlikely(!p))
3406 goto out_overflow;
3407 *res = be32_to_cpup(p);
3408 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3409 }
3410 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3411 return 0;
3412 out_overflow:
3413 print_overflow_msg(__func__, xdr);
3414 return -EIO;
3415 }
3416
3417 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3418 {
3419 __be32 *p;
3420 int ret = 0;
3421
3422 fsid->major = 0;
3423 fsid->minor = 0;
3424 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3425 return -EIO;
3426 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3427 p = xdr_inline_decode(xdr, 16);
3428 if (unlikely(!p))
3429 goto out_overflow;
3430 p = xdr_decode_hyper(p, &fsid->major);
3431 xdr_decode_hyper(p, &fsid->minor);
3432 bitmap[0] &= ~FATTR4_WORD0_FSID;
3433 ret = NFS_ATTR_FATTR_FSID;
3434 }
3435 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3436 (unsigned long long)fsid->major,
3437 (unsigned long long)fsid->minor);
3438 return ret;
3439 out_overflow:
3440 print_overflow_msg(__func__, xdr);
3441 return -EIO;
3442 }
3443
3444 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3445 {
3446 __be32 *p;
3447
3448 *res = 60;
3449 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3450 return -EIO;
3451 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3452 p = xdr_inline_decode(xdr, 4);
3453 if (unlikely(!p))
3454 goto out_overflow;
3455 *res = be32_to_cpup(p);
3456 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3457 }
3458 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3459 return 0;
3460 out_overflow:
3461 print_overflow_msg(__func__, xdr);
3462 return -EIO;
3463 }
3464
3465 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3466 {
3467 __be32 *p;
3468
3469 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3470 return -EIO;
3471 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3472 p = xdr_inline_decode(xdr, 4);
3473 if (unlikely(!p))
3474 goto out_overflow;
3475 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3476 *res = -be32_to_cpup(p);
3477 }
3478 return 0;
3479 out_overflow:
3480 print_overflow_msg(__func__, xdr);
3481 return -EIO;
3482 }
3483
3484 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3485 uint32_t *bitmap, uint32_t *bitmask)
3486 {
3487 if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3488 int ret;
3489 ret = decode_attr_bitmap(xdr, bitmask);
3490 if (unlikely(ret < 0))
3491 return ret;
3492 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3493 } else
3494 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3495 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3496 bitmask[0], bitmask[1], bitmask[2]);
3497 return 0;
3498 }
3499
3500 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3501 {
3502 __be32 *p;
3503 int len;
3504
3505 if (fh != NULL)
3506 memset(fh, 0, sizeof(*fh));
3507
3508 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3509 return -EIO;
3510 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3511 p = xdr_inline_decode(xdr, 4);
3512 if (unlikely(!p))
3513 goto out_overflow;
3514 len = be32_to_cpup(p);
3515 if (len > NFS4_FHSIZE)
3516 return -EIO;
3517 p = xdr_inline_decode(xdr, len);
3518 if (unlikely(!p))
3519 goto out_overflow;
3520 if (fh != NULL) {
3521 memcpy(fh->data, p, len);
3522 fh->size = len;
3523 }
3524 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3525 }
3526 return 0;
3527 out_overflow:
3528 print_overflow_msg(__func__, xdr);
3529 return -EIO;
3530 }
3531
3532 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3533 {
3534 __be32 *p;
3535
3536 *res = 0;
3537 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3538 return -EIO;
3539 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3540 p = xdr_inline_decode(xdr, 4);
3541 if (unlikely(!p))
3542 goto out_overflow;
3543 *res = be32_to_cpup(p);
3544 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3545 }
3546 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3547 return 0;
3548 out_overflow:
3549 print_overflow_msg(__func__, xdr);
3550 return -EIO;
3551 }
3552
3553 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3554 {
3555 __be32 *p;
3556 int ret = 0;
3557
3558 *fileid = 0;
3559 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3560 return -EIO;
3561 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3562 p = xdr_inline_decode(xdr, 8);
3563 if (unlikely(!p))
3564 goto out_overflow;
3565 xdr_decode_hyper(p, fileid);
3566 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3567 ret = NFS_ATTR_FATTR_FILEID;
3568 }
3569 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3570 return ret;
3571 out_overflow:
3572 print_overflow_msg(__func__, xdr);
3573 return -EIO;
3574 }
3575
3576 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3577 {
3578 __be32 *p;
3579 int ret = 0;
3580
3581 *fileid = 0;
3582 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3583 return -EIO;
3584 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3585 p = xdr_inline_decode(xdr, 8);
3586 if (unlikely(!p))
3587 goto out_overflow;
3588 xdr_decode_hyper(p, fileid);
3589 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3590 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3591 }
3592 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3593 return ret;
3594 out_overflow:
3595 print_overflow_msg(__func__, xdr);
3596 return -EIO;
3597 }
3598
3599 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3600 {
3601 __be32 *p;
3602 int status = 0;
3603
3604 *res = 0;
3605 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3606 return -EIO;
3607 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3608 p = xdr_inline_decode(xdr, 8);
3609 if (unlikely(!p))
3610 goto out_overflow;
3611 xdr_decode_hyper(p, res);
3612 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3613 }
3614 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3615 return status;
3616 out_overflow:
3617 print_overflow_msg(__func__, xdr);
3618 return -EIO;
3619 }
3620
3621 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3622 {
3623 __be32 *p;
3624 int status = 0;
3625
3626 *res = 0;
3627 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3628 return -EIO;
3629 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3630 p = xdr_inline_decode(xdr, 8);
3631 if (unlikely(!p))
3632 goto out_overflow;
3633 xdr_decode_hyper(p, res);
3634 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3635 }
3636 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3637 return status;
3638 out_overflow:
3639 print_overflow_msg(__func__, xdr);
3640 return -EIO;
3641 }
3642
3643 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3644 {
3645 __be32 *p;
3646 int status = 0;
3647
3648 *res = 0;
3649 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3650 return -EIO;
3651 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3652 p = xdr_inline_decode(xdr, 8);
3653 if (unlikely(!p))
3654 goto out_overflow;
3655 xdr_decode_hyper(p, res);
3656 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3657 }
3658 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3659 return status;
3660 out_overflow:
3661 print_overflow_msg(__func__, xdr);
3662 return -EIO;
3663 }
3664
3665 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3666 {
3667 u32 n;
3668 __be32 *p;
3669 int status = 0;
3670
3671 p = xdr_inline_decode(xdr, 4);
3672 if (unlikely(!p))
3673 goto out_overflow;
3674 n = be32_to_cpup(p);
3675 if (n == 0)
3676 goto root_path;
3677 dprintk("pathname4: ");
3678 if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3679 dprintk("cannot parse %d components in path\n", n);
3680 goto out_eio;
3681 }
3682 for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3683 struct nfs4_string *component = &path->components[path->ncomponents];
3684 status = decode_opaque_inline(xdr, &component->len, &component->data);
3685 if (unlikely(status != 0))
3686 goto out_eio;
3687 ifdebug (XDR)
3688 pr_cont("%s%.*s ",
3689 (path->ncomponents != n ? "/ " : ""),
3690 component->len, component->data);
3691 }
3692 out:
3693 return status;
3694 root_path:
3695 /* a root pathname is sent as a zero component4 */
3696 path->ncomponents = 1;
3697 path->components[0].len=0;
3698 path->components[0].data=NULL;
3699 dprintk("pathname4: /\n");
3700 goto out;
3701 out_eio:
3702 dprintk(" status %d", status);
3703 status = -EIO;
3704 goto out;
3705 out_overflow:
3706 print_overflow_msg(__func__, xdr);
3707 return -EIO;
3708 }
3709
3710 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3711 {
3712 int n;
3713 __be32 *p;
3714 int status = -EIO;
3715
3716 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3717 goto out;
3718 status = 0;
3719 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3720 goto out;
3721 bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3722 status = -EIO;
3723 /* Ignore borken servers that return unrequested attrs */
3724 if (unlikely(res == NULL))
3725 goto out;
3726 dprintk("%s: fsroot:\n", __func__);
3727 status = decode_pathname(xdr, &res->fs_path);
3728 if (unlikely(status != 0))
3729 goto out;
3730 p = xdr_inline_decode(xdr, 4);
3731 if (unlikely(!p))
3732 goto out_overflow;
3733 n = be32_to_cpup(p);
3734 if (n <= 0)
3735 goto out_eio;
3736 for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3737 u32 m;
3738 struct nfs4_fs_location *loc;
3739
3740 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3741 break;
3742 loc = &res->locations[res->nlocations];
3743 p = xdr_inline_decode(xdr, 4);
3744 if (unlikely(!p))
3745 goto out_overflow;
3746 m = be32_to_cpup(p);
3747
3748 dprintk("%s: servers:\n", __func__);
3749 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3750 struct nfs4_string *server;
3751
3752 if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3753 unsigned int i;
3754 dprintk("%s: using first %u of %u servers "
3755 "returned for location %u\n",
3756 __func__,
3757 NFS4_FS_LOCATION_MAXSERVERS,
3758 m, res->nlocations);
3759 for (i = loc->nservers; i < m; i++) {
3760 unsigned int len;
3761 char *data;
3762 status = decode_opaque_inline(xdr, &len, &data);
3763 if (unlikely(status != 0))
3764 goto out_eio;
3765 }
3766 break;
3767 }
3768 server = &loc->servers[loc->nservers];
3769 status = decode_opaque_inline(xdr, &server->len, &server->data);
3770 if (unlikely(status != 0))
3771 goto out_eio;
3772 dprintk("%s ", server->data);
3773 }
3774 status = decode_pathname(xdr, &loc->rootpath);
3775 if (unlikely(status != 0))
3776 goto out_eio;
3777 }
3778 if (res->nlocations != 0)
3779 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3780 out:
3781 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3782 return status;
3783 out_overflow:
3784 print_overflow_msg(__func__, xdr);
3785 out_eio:
3786 status = -EIO;
3787 goto out;
3788 }
3789
3790 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3791 {
3792 __be32 *p;
3793 int status = 0;
3794
3795 *res = 0;
3796 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3797 return -EIO;
3798 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3799 p = xdr_inline_decode(xdr, 8);
3800 if (unlikely(!p))
3801 goto out_overflow;
3802 xdr_decode_hyper(p, res);
3803 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3804 }
3805 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3806 return status;
3807 out_overflow:
3808 print_overflow_msg(__func__, xdr);
3809 return -EIO;
3810 }
3811
3812 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3813 {
3814 __be32 *p;
3815 int status = 0;
3816
3817 *maxlink = 1;
3818 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3819 return -EIO;
3820 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3821 p = xdr_inline_decode(xdr, 4);
3822 if (unlikely(!p))
3823 goto out_overflow;
3824 *maxlink = be32_to_cpup(p);
3825 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3826 }
3827 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3828 return status;
3829 out_overflow:
3830 print_overflow_msg(__func__, xdr);
3831 return -EIO;
3832 }
3833
3834 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3835 {
3836 __be32 *p;
3837 int status = 0;
3838
3839 *maxname = 1024;
3840 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3841 return -EIO;
3842 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3843 p = xdr_inline_decode(xdr, 4);
3844 if (unlikely(!p))
3845 goto out_overflow;
3846 *maxname = be32_to_cpup(p);
3847 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3848 }
3849 dprintk("%s: maxname=%u\n", __func__, *maxname);
3850 return status;
3851 out_overflow:
3852 print_overflow_msg(__func__, xdr);
3853 return -EIO;
3854 }
3855
3856 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3857 {
3858 __be32 *p;
3859 int status = 0;
3860
3861 *res = 1024;
3862 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3863 return -EIO;
3864 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3865 uint64_t maxread;
3866 p = xdr_inline_decode(xdr, 8);
3867 if (unlikely(!p))
3868 goto out_overflow;
3869 xdr_decode_hyper(p, &maxread);
3870 if (maxread > 0x7FFFFFFF)
3871 maxread = 0x7FFFFFFF;
3872 *res = (uint32_t)maxread;
3873 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3874 }
3875 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3876 return status;
3877 out_overflow:
3878 print_overflow_msg(__func__, xdr);
3879 return -EIO;
3880 }
3881
3882 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3883 {
3884 __be32 *p;
3885 int status = 0;
3886
3887 *res = 1024;
3888 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3889 return -EIO;
3890 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3891 uint64_t maxwrite;
3892 p = xdr_inline_decode(xdr, 8);
3893 if (unlikely(!p))
3894 goto out_overflow;
3895 xdr_decode_hyper(p, &maxwrite);
3896 if (maxwrite > 0x7FFFFFFF)
3897 maxwrite = 0x7FFFFFFF;
3898 *res = (uint32_t)maxwrite;
3899 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3900 }
3901 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3902 return status;
3903 out_overflow:
3904 print_overflow_msg(__func__, xdr);
3905 return -EIO;
3906 }
3907
3908 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3909 {
3910 uint32_t tmp;
3911 __be32 *p;
3912 int ret = 0;
3913
3914 *mode = 0;
3915 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3916 return -EIO;
3917 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3918 p = xdr_inline_decode(xdr, 4);
3919 if (unlikely(!p))
3920 goto out_overflow;
3921 tmp = be32_to_cpup(p);
3922 *mode = tmp & ~S_IFMT;
3923 bitmap[1] &= ~FATTR4_WORD1_MODE;
3924 ret = NFS_ATTR_FATTR_MODE;
3925 }
3926 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3927 return ret;
3928 out_overflow:
3929 print_overflow_msg(__func__, xdr);
3930 return -EIO;
3931 }
3932
3933 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3934 {
3935 __be32 *p;
3936 int ret = 0;
3937
3938 *nlink = 1;
3939 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3940 return -EIO;
3941 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3942 p = xdr_inline_decode(xdr, 4);
3943 if (unlikely(!p))
3944 goto out_overflow;
3945 *nlink = be32_to_cpup(p);
3946 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3947 ret = NFS_ATTR_FATTR_NLINK;
3948 }
3949 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3950 return ret;
3951 out_overflow:
3952 print_overflow_msg(__func__, xdr);
3953 return -EIO;
3954 }
3955
3956 static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3957 struct nfs4_string *name, gfp_t gfp_flags)
3958 {
3959 ssize_t ret;
3960
3961 ret = xdr_stream_decode_string_dup(xdr, &name->data,
3962 XDR_MAX_NETOBJ, gfp_flags);
3963 name->len = 0;
3964 if (ret > 0)
3965 name->len = ret;
3966 return ret;
3967 }
3968
3969 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3970 const struct nfs_server *server, kuid_t *uid,
3971 struct nfs4_string *owner_name)
3972 {
3973 ssize_t len;
3974 char *p;
3975
3976 *uid = make_kuid(&init_user_ns, -2);
3977 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3978 return -EIO;
3979 if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3980 return 0;
3981 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3982
3983 if (owner_name != NULL) {
3984 len = decode_nfs4_string(xdr, owner_name, GFP_NOWAIT);
3985 if (len <= 0)
3986 goto out;
3987 dprintk("%s: name=%s\n", __func__, owner_name->data);
3988 return NFS_ATTR_FATTR_OWNER_NAME;
3989 } else {
3990 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3991 XDR_MAX_NETOBJ);
3992 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3993 goto out;
3994 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3995 return NFS_ATTR_FATTR_OWNER;
3996 }
3997 out:
3998 if (len != -EBADMSG)
3999 return 0;
4000 print_overflow_msg(__func__, xdr);
4001 return -EIO;
4002 }
4003
4004 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
4005 const struct nfs_server *server, kgid_t *gid,
4006 struct nfs4_string *group_name)
4007 {
4008 ssize_t len;
4009 char *p;
4010
4011 *gid = make_kgid(&init_user_ns, -2);
4012 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
4013 return -EIO;
4014 if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
4015 return 0;
4016 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
4017
4018 if (group_name != NULL) {
4019 len = decode_nfs4_string(xdr, group_name, GFP_NOWAIT);
4020 if (len <= 0)
4021 goto out;
4022 dprintk("%s: name=%s\n", __func__, group_name->data);
4023 return NFS_ATTR_FATTR_GROUP_NAME;
4024 } else {
4025 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
4026 XDR_MAX_NETOBJ);
4027 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
4028 goto out;
4029 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
4030 return NFS_ATTR_FATTR_GROUP;
4031 }
4032 out:
4033 if (len != -EBADMSG)
4034 return 0;
4035 print_overflow_msg(__func__, xdr);
4036 return -EIO;
4037 }
4038
4039 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
4040 {
4041 uint32_t major = 0, minor = 0;
4042 __be32 *p;
4043 int ret = 0;
4044
4045 *rdev = MKDEV(0,0);
4046 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
4047 return -EIO;
4048 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
4049 dev_t tmp;
4050
4051 p = xdr_inline_decode(xdr, 8);
4052 if (unlikely(!p))
4053 goto out_overflow;
4054 major = be32_to_cpup(p++);
4055 minor = be32_to_cpup(p);
4056 tmp = MKDEV(major, minor);
4057 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
4058 *rdev = tmp;
4059 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
4060 ret = NFS_ATTR_FATTR_RDEV;
4061 }
4062 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
4063 return ret;
4064 out_overflow:
4065 print_overflow_msg(__func__, xdr);
4066 return -EIO;
4067 }
4068
4069 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4070 {
4071 __be32 *p;
4072 int status = 0;
4073
4074 *res = 0;
4075 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
4076 return -EIO;
4077 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4078 p = xdr_inline_decode(xdr, 8);
4079 if (unlikely(!p))
4080 goto out_overflow;
4081 xdr_decode_hyper(p, res);
4082 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4083 }
4084 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4085 return status;
4086 out_overflow:
4087 print_overflow_msg(__func__, xdr);
4088 return -EIO;
4089 }
4090
4091 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4092 {
4093 __be32 *p;
4094 int status = 0;
4095
4096 *res = 0;
4097 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4098 return -EIO;
4099 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4100 p = xdr_inline_decode(xdr, 8);
4101 if (unlikely(!p))
4102 goto out_overflow;
4103 xdr_decode_hyper(p, res);
4104 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4105 }
4106 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4107 return status;
4108 out_overflow:
4109 print_overflow_msg(__func__, xdr);
4110 return -EIO;
4111 }
4112
4113 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4114 {
4115 __be32 *p;
4116 int status = 0;
4117
4118 *res = 0;
4119 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4120 return -EIO;
4121 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4122 p = xdr_inline_decode(xdr, 8);
4123 if (unlikely(!p))
4124 goto out_overflow;
4125 xdr_decode_hyper(p, res);
4126 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4127 }
4128 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4129 return status;
4130 out_overflow:
4131 print_overflow_msg(__func__, xdr);
4132 return -EIO;
4133 }
4134
4135 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4136 {
4137 __be32 *p;
4138 int ret = 0;
4139
4140 *used = 0;
4141 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4142 return -EIO;
4143 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4144 p = xdr_inline_decode(xdr, 8);
4145 if (unlikely(!p))
4146 goto out_overflow;
4147 xdr_decode_hyper(p, used);
4148 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4149 ret = NFS_ATTR_FATTR_SPACE_USED;
4150 }
4151 dprintk("%s: space used=%Lu\n", __func__,
4152 (unsigned long long)*used);
4153 return ret;
4154 out_overflow:
4155 print_overflow_msg(__func__, xdr);
4156 return -EIO;
4157 }
4158
4159 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4160 {
4161 __be32 *p;
4162 uint64_t sec;
4163 uint32_t nsec;
4164
4165 p = xdr_inline_decode(xdr, 12);
4166 if (unlikely(!p))
4167 goto out_overflow;
4168 p = xdr_decode_hyper(p, &sec);
4169 nsec = be32_to_cpup(p);
4170 time->tv_sec = (time_t)sec;
4171 time->tv_nsec = (long)nsec;
4172 return 0;
4173 out_overflow:
4174 print_overflow_msg(__func__, xdr);
4175 return -EIO;
4176 }
4177
4178 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4179 {
4180 int status = 0;
4181
4182 time->tv_sec = 0;
4183 time->tv_nsec = 0;
4184 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4185 return -EIO;
4186 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4187 status = decode_attr_time(xdr, time);
4188 if (status == 0)
4189 status = NFS_ATTR_FATTR_ATIME;
4190 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4191 }
4192 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4193 return status;
4194 }
4195
4196 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4197 {
4198 int status = 0;
4199
4200 time->tv_sec = 0;
4201 time->tv_nsec = 0;
4202 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4203 return -EIO;
4204 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4205 status = decode_attr_time(xdr, time);
4206 if (status == 0)
4207 status = NFS_ATTR_FATTR_CTIME;
4208 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4209 }
4210 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4211 return status;
4212 }
4213
4214 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4215 struct timespec *time)
4216 {
4217 int status = 0;
4218
4219 time->tv_sec = 0;
4220 time->tv_nsec = 0;
4221 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4222 return -EIO;
4223 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4224 status = decode_attr_time(xdr, time);
4225 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4226 }
4227 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4228 (long)time->tv_nsec);
4229 return status;
4230 }
4231
4232 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4233 struct nfs4_label *label)
4234 {
4235 uint32_t pi = 0;
4236 uint32_t lfs = 0;
4237 __u32 len;
4238 __be32 *p;
4239 int status = 0;
4240
4241 if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4242 return -EIO;
4243 if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4244 p = xdr_inline_decode(xdr, 4);
4245 if (unlikely(!p))
4246 goto out_overflow;
4247 lfs = be32_to_cpup(p++);
4248 p = xdr_inline_decode(xdr, 4);
4249 if (unlikely(!p))
4250 goto out_overflow;
4251 pi = be32_to_cpup(p++);
4252 p = xdr_inline_decode(xdr, 4);
4253 if (unlikely(!p))
4254 goto out_overflow;
4255 len = be32_to_cpup(p++);
4256 p = xdr_inline_decode(xdr, len);
4257 if (unlikely(!p))
4258 goto out_overflow;
4259 if (len < NFS4_MAXLABELLEN) {
4260 if (label) {
4261 memcpy(label->label, p, len);
4262 label->len = len;
4263 label->pi = pi;
4264 label->lfs = lfs;
4265 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4266 }
4267 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4268 } else
4269 printk(KERN_WARNING "%s: label too long (%u)!\n",
4270 __func__, len);
4271 }
4272 if (label && label->label)
4273 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4274 (char *)label->label, label->len, label->pi, label->lfs);
4275 return status;
4276
4277 out_overflow:
4278 print_overflow_msg(__func__, xdr);
4279 return -EIO;
4280 }
4281
4282 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4283 {
4284 int status = 0;
4285
4286 time->tv_sec = 0;
4287 time->tv_nsec = 0;
4288 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4289 return -EIO;
4290 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4291 status = decode_attr_time(xdr, time);
4292 if (status == 0)
4293 status = NFS_ATTR_FATTR_MTIME;
4294 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4295 }
4296 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4297 return status;
4298 }
4299
4300 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4301 {
4302 unsigned int attrwords = XDR_QUADLEN(attrlen);
4303 unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4304
4305 if (unlikely(attrwords != nwords)) {
4306 dprintk("%s: server returned incorrect attribute length: "
4307 "%u %c %u\n",
4308 __func__,
4309 attrwords << 2,
4310 (attrwords < nwords) ? '<' : '>',
4311 nwords << 2);
4312 return -EIO;
4313 }
4314 return 0;
4315 }
4316
4317 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4318 {
4319 __be32 *p;
4320
4321 p = xdr_inline_decode(xdr, 20);
4322 if (unlikely(!p))
4323 goto out_overflow;
4324 cinfo->atomic = be32_to_cpup(p++);
4325 p = xdr_decode_hyper(p, &cinfo->before);
4326 xdr_decode_hyper(p, &cinfo->after);
4327 return 0;
4328 out_overflow:
4329 print_overflow_msg(__func__, xdr);
4330 return -EIO;
4331 }
4332
4333 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4334 {
4335 __be32 *p;
4336 uint32_t supp, acc;
4337 int status;
4338
4339 status = decode_op_hdr(xdr, OP_ACCESS);
4340 if (status)
4341 return status;
4342 p = xdr_inline_decode(xdr, 8);
4343 if (unlikely(!p))
4344 goto out_overflow;
4345 supp = be32_to_cpup(p++);
4346 acc = be32_to_cpup(p);
4347 *supported = supp;
4348 *access = acc;
4349 return 0;
4350 out_overflow:
4351 print_overflow_msg(__func__, xdr);
4352 return -EIO;
4353 }
4354
4355 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4356 {
4357 ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4358 if (unlikely(ret < 0)) {
4359 print_overflow_msg(__func__, xdr);
4360 return -EIO;
4361 }
4362 return 0;
4363 }
4364
4365 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4366 {
4367 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4368 }
4369
4370 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4371 {
4372 stateid->type = NFS4_OPEN_STATEID_TYPE;
4373 return decode_stateid(xdr, stateid);
4374 }
4375
4376 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4377 {
4378 stateid->type = NFS4_LOCK_STATEID_TYPE;
4379 return decode_stateid(xdr, stateid);
4380 }
4381
4382 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4383 {
4384 stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4385 return decode_stateid(xdr, stateid);
4386 }
4387
4388 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4389 {
4390 int status;
4391
4392 status = decode_op_hdr(xdr, OP_CLOSE);
4393 if (status != -EIO)
4394 nfs_increment_open_seqid(status, res->seqid);
4395 if (!status)
4396 status = decode_open_stateid(xdr, &res->stateid);
4397 return status;
4398 }
4399
4400 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4401 {
4402 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4403 }
4404
4405 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4406 {
4407 return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4408 }
4409
4410 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4411 {
4412 int status;
4413
4414 status = decode_op_hdr(xdr, OP_COMMIT);
4415 if (!status)
4416 status = decode_write_verifier(xdr, &res->verf->verifier);
4417 return status;
4418 }
4419
4420 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4421 {
4422 __be32 *p;
4423 uint32_t bmlen;
4424 int status;
4425
4426 status = decode_op_hdr(xdr, OP_CREATE);
4427 if (status)
4428 return status;
4429 if ((status = decode_change_info(xdr, cinfo)))
4430 return status;
4431 p = xdr_inline_decode(xdr, 4);
4432 if (unlikely(!p))
4433 goto out_overflow;
4434 bmlen = be32_to_cpup(p);
4435 p = xdr_inline_decode(xdr, bmlen << 2);
4436 if (likely(p))
4437 return 0;
4438 out_overflow:
4439 print_overflow_msg(__func__, xdr);
4440 return -EIO;
4441 }
4442
4443 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4444 {
4445 unsigned int savep;
4446 uint32_t attrlen, bitmap[3] = {0};
4447 int status;
4448
4449 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4450 goto xdr_error;
4451 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4452 goto xdr_error;
4453 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4454 goto xdr_error;
4455 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4456 goto xdr_error;
4457 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4458 &res->fh_expire_type)) != 0)
4459 goto xdr_error;
4460 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4461 goto xdr_error;
4462 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4463 goto xdr_error;
4464 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4465 goto xdr_error;
4466 if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4467 res->exclcreat_bitmask)) != 0)
4468 goto xdr_error;
4469 status = verify_attr_len(xdr, savep, attrlen);
4470 xdr_error:
4471 dprintk("%s: xdr returned %d!\n", __func__, -status);
4472 return status;
4473 }
4474
4475 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4476 {
4477 unsigned int savep;
4478 uint32_t attrlen, bitmap[3] = {0};
4479 int status;
4480
4481 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4482 goto xdr_error;
4483 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4484 goto xdr_error;
4485 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4486 goto xdr_error;
4487
4488 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4489 goto xdr_error;
4490 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4491 goto xdr_error;
4492 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4493 goto xdr_error;
4494
4495 status = -EIO;
4496 if (unlikely(bitmap[0]))
4497 goto xdr_error;
4498
4499 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4500 goto xdr_error;
4501 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4502 goto xdr_error;
4503 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4504 goto xdr_error;
4505
4506 status = verify_attr_len(xdr, savep, attrlen);
4507 xdr_error:
4508 dprintk("%s: xdr returned %d!\n", __func__, -status);
4509 return status;
4510 }
4511
4512 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4513 {
4514 unsigned int savep;
4515 uint32_t attrlen, bitmap[3] = {0};
4516 int status;
4517
4518 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4519 goto xdr_error;
4520 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4521 goto xdr_error;
4522 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4523 goto xdr_error;
4524
4525 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4526 goto xdr_error;
4527 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4528 goto xdr_error;
4529
4530 status = verify_attr_len(xdr, savep, attrlen);
4531 xdr_error:
4532 dprintk("%s: xdr returned %d!\n", __func__, -status);
4533 return status;
4534 }
4535
4536 static int decode_threshold_hint(struct xdr_stream *xdr,
4537 uint32_t *bitmap,
4538 uint64_t *res,
4539 uint32_t hint_bit)
4540 {
4541 __be32 *p;
4542
4543 *res = 0;
4544 if (likely(bitmap[0] & hint_bit)) {
4545 p = xdr_inline_decode(xdr, 8);
4546 if (unlikely(!p))
4547 goto out_overflow;
4548 xdr_decode_hyper(p, res);
4549 }
4550 return 0;
4551 out_overflow:
4552 print_overflow_msg(__func__, xdr);
4553 return -EIO;
4554 }
4555
4556 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4557 struct nfs4_threshold *res)
4558 {
4559 __be32 *p;
4560 unsigned int savep;
4561 uint32_t bitmap[3] = {0,}, attrlen;
4562 int status;
4563
4564 /* layout type */
4565 p = xdr_inline_decode(xdr, 4);
4566 if (unlikely(!p)) {
4567 print_overflow_msg(__func__, xdr);
4568 return -EIO;
4569 }
4570 res->l_type = be32_to_cpup(p);
4571
4572 /* thi_hintset bitmap */
4573 status = decode_attr_bitmap(xdr, bitmap);
4574 if (status < 0)
4575 goto xdr_error;
4576
4577 /* thi_hintlist length */
4578 status = decode_attr_length(xdr, &attrlen, &savep);
4579 if (status < 0)
4580 goto xdr_error;
4581 /* thi_hintlist */
4582 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4583 if (status < 0)
4584 goto xdr_error;
4585 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4586 if (status < 0)
4587 goto xdr_error;
4588 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4589 THRESHOLD_RD_IO);
4590 if (status < 0)
4591 goto xdr_error;
4592 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4593 THRESHOLD_WR_IO);
4594 if (status < 0)
4595 goto xdr_error;
4596
4597 status = verify_attr_len(xdr, savep, attrlen);
4598 res->bm = bitmap[0];
4599
4600 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4601 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4602 res->wr_io_sz);
4603 xdr_error:
4604 dprintk("%s ret=%d!\n", __func__, status);
4605 return status;
4606 }
4607
4608 /*
4609 * Thresholds on pNFS direct I/O vrs MDS I/O
4610 */
4611 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4612 uint32_t *bitmap,
4613 struct nfs4_threshold *res)
4614 {
4615 __be32 *p;
4616 int status = 0;
4617 uint32_t num;
4618
4619 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4620 return -EIO;
4621 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4622 /* Did the server return an unrequested attribute? */
4623 if (unlikely(res == NULL))
4624 return -EREMOTEIO;
4625 p = xdr_inline_decode(xdr, 4);
4626 if (unlikely(!p))
4627 goto out_overflow;
4628 num = be32_to_cpup(p);
4629 if (num == 0)
4630 return 0;
4631 if (num > 1)
4632 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4633 "drivers per filesystem not supported\n",
4634 __func__);
4635
4636 status = decode_first_threshold_item4(xdr, res);
4637 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4638 }
4639 return status;
4640 out_overflow:
4641 print_overflow_msg(__func__, xdr);
4642 return -EIO;
4643 }
4644
4645 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4646 struct nfs_fattr *fattr, struct nfs_fh *fh,
4647 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4648 const struct nfs_server *server)
4649 {
4650 int status;
4651 umode_t fmode = 0;
4652 uint32_t type;
4653 int32_t err;
4654
4655 status = decode_attr_type(xdr, bitmap, &type);
4656 if (status < 0)
4657 goto xdr_error;
4658 fattr->mode = 0;
4659 if (status != 0) {
4660 fattr->mode |= nfs_type2fmt[type];
4661 fattr->valid |= status;
4662 }
4663
4664 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4665 if (status < 0)
4666 goto xdr_error;
4667 fattr->valid |= status;
4668
4669 status = decode_attr_size(xdr, bitmap, &fattr->size);
4670 if (status < 0)
4671 goto xdr_error;
4672 fattr->valid |= status;
4673
4674 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4675 if (status < 0)
4676 goto xdr_error;
4677 fattr->valid |= status;
4678
4679 err = 0;
4680 status = decode_attr_error(xdr, bitmap, &err);
4681 if (status < 0)
4682 goto xdr_error;
4683
4684 status = decode_attr_filehandle(xdr, bitmap, fh);
4685 if (status < 0)
4686 goto xdr_error;
4687
4688 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4689 if (status < 0)
4690 goto xdr_error;
4691 fattr->valid |= status;
4692
4693 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4694 if (status < 0)
4695 goto xdr_error;
4696 fattr->valid |= status;
4697
4698 status = -EIO;
4699 if (unlikely(bitmap[0]))
4700 goto xdr_error;
4701
4702 status = decode_attr_mode(xdr, bitmap, &fmode);
4703 if (status < 0)
4704 goto xdr_error;
4705 if (status != 0) {
4706 fattr->mode |= fmode;
4707 fattr->valid |= status;
4708 }
4709
4710 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4711 if (status < 0)
4712 goto xdr_error;
4713 fattr->valid |= status;
4714
4715 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4716 if (status < 0)
4717 goto xdr_error;
4718 fattr->valid |= status;
4719
4720 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4721 if (status < 0)
4722 goto xdr_error;
4723 fattr->valid |= status;
4724
4725 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4726 if (status < 0)
4727 goto xdr_error;
4728 fattr->valid |= status;
4729
4730 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4731 if (status < 0)
4732 goto xdr_error;
4733 fattr->valid |= status;
4734
4735 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4736 if (status < 0)
4737 goto xdr_error;
4738 fattr->valid |= status;
4739
4740 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4741 if (status < 0)
4742 goto xdr_error;
4743 fattr->valid |= status;
4744
4745 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4746 if (status < 0)
4747 goto xdr_error;
4748 fattr->valid |= status;
4749
4750 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4751 if (status < 0)
4752 goto xdr_error;
4753 fattr->valid |= status;
4754
4755 status = -EIO;
4756 if (unlikely(bitmap[1]))
4757 goto xdr_error;
4758
4759 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4760 if (status < 0)
4761 goto xdr_error;
4762
4763 if (label) {
4764 status = decode_attr_security_label(xdr, bitmap, label);
4765 if (status < 0)
4766 goto xdr_error;
4767 fattr->valid |= status;
4768 }
4769
4770 xdr_error:
4771 dprintk("%s: xdr returned %d\n", __func__, -status);
4772 return status;
4773 }
4774
4775 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4776 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4777 struct nfs4_label *label, const struct nfs_server *server)
4778 {
4779 unsigned int savep;
4780 uint32_t attrlen,
4781 bitmap[3] = {0};
4782 int status;
4783
4784 status = decode_op_hdr(xdr, OP_GETATTR);
4785 if (status < 0)
4786 goto xdr_error;
4787
4788 status = decode_attr_bitmap(xdr, bitmap);
4789 if (status < 0)
4790 goto xdr_error;
4791
4792 status = decode_attr_length(xdr, &attrlen, &savep);
4793 if (status < 0)
4794 goto xdr_error;
4795
4796 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4797 label, server);
4798 if (status < 0)
4799 goto xdr_error;
4800
4801 status = verify_attr_len(xdr, savep, attrlen);
4802 xdr_error:
4803 dprintk("%s: xdr returned %d\n", __func__, -status);
4804 return status;
4805 }
4806
4807 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4808 struct nfs4_label *label, const struct nfs_server *server)
4809 {
4810 return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4811 }
4812
4813 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4814 const struct nfs_server *server)
4815 {
4816 return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4817 }
4818
4819 /*
4820 * Decode potentially multiple layout types.
4821 */
4822 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4823 struct nfs_fsinfo *fsinfo)
4824 {
4825 __be32 *p;
4826 uint32_t i;
4827
4828 p = xdr_inline_decode(xdr, 4);
4829 if (unlikely(!p))
4830 goto out_overflow;
4831 fsinfo->nlayouttypes = be32_to_cpup(p);
4832
4833 /* pNFS is not supported by the underlying file system */
4834 if (fsinfo->nlayouttypes == 0)
4835 return 0;
4836
4837 /* Decode and set first layout type, move xdr->p past unused types */
4838 p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4839 if (unlikely(!p))
4840 goto out_overflow;
4841
4842 /* If we get too many, then just cap it at the max */
4843 if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4844 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4845 __func__, fsinfo->nlayouttypes);
4846 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4847 }
4848
4849 for(i = 0; i < fsinfo->nlayouttypes; ++i)
4850 fsinfo->layouttype[i] = be32_to_cpup(p++);
4851 return 0;
4852 out_overflow:
4853 print_overflow_msg(__func__, xdr);
4854 return -EIO;
4855 }
4856
4857 /*
4858 * The type of file system exported.
4859 * Note we must ensure that layouttype is set in any non-error case.
4860 */
4861 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4862 struct nfs_fsinfo *fsinfo)
4863 {
4864 int status = 0;
4865
4866 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4867 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4868 return -EIO;
4869 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4870 status = decode_pnfs_layout_types(xdr, fsinfo);
4871 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4872 }
4873 return status;
4874 }
4875
4876 /*
4877 * The prefered block size for layout directed io
4878 */
4879 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4880 uint32_t *res)
4881 {
4882 __be32 *p;
4883
4884 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4885 *res = 0;
4886 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4887 p = xdr_inline_decode(xdr, 4);
4888 if (unlikely(!p)) {
4889 print_overflow_msg(__func__, xdr);
4890 return -EIO;
4891 }
4892 *res = be32_to_cpup(p);
4893 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4894 }
4895 return 0;
4896 }
4897
4898 /*
4899 * The granularity of a CLONE operation.
4900 */
4901 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4902 uint32_t *res)
4903 {
4904 __be32 *p;
4905
4906 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4907 *res = 0;
4908 if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4909 p = xdr_inline_decode(xdr, 4);
4910 if (unlikely(!p)) {
4911 print_overflow_msg(__func__, xdr);
4912 return -EIO;
4913 }
4914 *res = be32_to_cpup(p);
4915 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4916 }
4917 return 0;
4918 }
4919
4920 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4921 {
4922 unsigned int savep;
4923 uint32_t attrlen, bitmap[3];
4924 int status;
4925
4926 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4927 goto xdr_error;
4928 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4929 goto xdr_error;
4930 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4931 goto xdr_error;
4932
4933 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4934
4935 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4936 goto xdr_error;
4937 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4938 goto xdr_error;
4939 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4940 goto xdr_error;
4941 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4942 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4943 goto xdr_error;
4944 fsinfo->wtpref = fsinfo->wtmax;
4945
4946 status = -EIO;
4947 if (unlikely(bitmap[0]))
4948 goto xdr_error;
4949
4950 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4951 if (status != 0)
4952 goto xdr_error;
4953 status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4954 if (status != 0)
4955 goto xdr_error;
4956
4957 status = -EIO;
4958 if (unlikely(bitmap[1]))
4959 goto xdr_error;
4960
4961 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4962 if (status)
4963 goto xdr_error;
4964 status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4965 if (status)
4966 goto xdr_error;
4967
4968 status = verify_attr_len(xdr, savep, attrlen);
4969 xdr_error:
4970 dprintk("%s: xdr returned %d!\n", __func__, -status);
4971 return status;
4972 }
4973
4974 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4975 {
4976 __be32 *p;
4977 uint32_t len;
4978 int status;
4979
4980 /* Zero handle first to allow comparisons */
4981 memset(fh, 0, sizeof(*fh));
4982
4983 status = decode_op_hdr(xdr, OP_GETFH);
4984 if (status)
4985 return status;
4986
4987 p = xdr_inline_decode(xdr, 4);
4988 if (unlikely(!p))
4989 goto out_overflow;
4990 len = be32_to_cpup(p);
4991 if (len > NFS4_FHSIZE)
4992 return -EIO;
4993 fh->size = len;
4994 p = xdr_inline_decode(xdr, len);
4995 if (unlikely(!p))
4996 goto out_overflow;
4997 memcpy(fh->data, p, len);
4998 return 0;
4999 out_overflow:
5000 print_overflow_msg(__func__, xdr);
5001 return -EIO;
5002 }
5003
5004 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5005 {
5006 int status;
5007
5008 status = decode_op_hdr(xdr, OP_LINK);
5009 if (status)
5010 return status;
5011 return decode_change_info(xdr, cinfo);
5012 }
5013
5014 /*
5015 * We create the owner, so we know a proper owner.id length is 4.
5016 */
5017 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
5018 {
5019 uint64_t offset, length, clientid;
5020 __be32 *p;
5021 uint32_t namelen, type;
5022
5023 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
5024 if (unlikely(!p))
5025 goto out_overflow;
5026 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
5027 p = xdr_decode_hyper(p, &length);
5028 type = be32_to_cpup(p++); /* 4 byte read */
5029 if (fl != NULL) { /* manipulate file lock */
5030 fl->fl_start = (loff_t)offset;
5031 fl->fl_end = fl->fl_start + (loff_t)length - 1;
5032 if (length == ~(uint64_t)0)
5033 fl->fl_end = OFFSET_MAX;
5034 fl->fl_type = F_WRLCK;
5035 if (type & 1)
5036 fl->fl_type = F_RDLCK;
5037 fl->fl_pid = 0;
5038 }
5039 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
5040 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
5041 p = xdr_inline_decode(xdr, namelen); /* variable size field */
5042 if (likely(p))
5043 return -NFS4ERR_DENIED;
5044 out_overflow:
5045 print_overflow_msg(__func__, xdr);
5046 return -EIO;
5047 }
5048
5049 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
5050 {
5051 int status;
5052
5053 status = decode_op_hdr(xdr, OP_LOCK);
5054 if (status == -EIO)
5055 goto out;
5056 if (status == 0) {
5057 status = decode_lock_stateid(xdr, &res->stateid);
5058 if (unlikely(status))
5059 goto out;
5060 } else if (status == -NFS4ERR_DENIED)
5061 status = decode_lock_denied(xdr, NULL);
5062 if (res->open_seqid != NULL)
5063 nfs_increment_open_seqid(status, res->open_seqid);
5064 nfs_increment_lock_seqid(status, res->lock_seqid);
5065 out:
5066 return status;
5067 }
5068
5069 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
5070 {
5071 int status;
5072 status = decode_op_hdr(xdr, OP_LOCKT);
5073 if (status == -NFS4ERR_DENIED)
5074 return decode_lock_denied(xdr, res->denied);
5075 return status;
5076 }
5077
5078 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
5079 {
5080 int status;
5081
5082 status = decode_op_hdr(xdr, OP_LOCKU);
5083 if (status != -EIO)
5084 nfs_increment_lock_seqid(status, res->seqid);
5085 if (status == 0)
5086 status = decode_lock_stateid(xdr, &res->stateid);
5087 return status;
5088 }
5089
5090 static int decode_release_lockowner(struct xdr_stream *xdr)
5091 {
5092 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5093 }
5094
5095 static int decode_lookup(struct xdr_stream *xdr)
5096 {
5097 return decode_op_hdr(xdr, OP_LOOKUP);
5098 }
5099
5100 static int decode_lookupp(struct xdr_stream *xdr)
5101 {
5102 return decode_op_hdr(xdr, OP_LOOKUPP);
5103 }
5104
5105 /* This is too sick! */
5106 static int decode_space_limit(struct xdr_stream *xdr,
5107 unsigned long *pagemod_limit)
5108 {
5109 __be32 *p;
5110 uint32_t limit_type, nblocks, blocksize;
5111 u64 maxsize = 0;
5112
5113 p = xdr_inline_decode(xdr, 12);
5114 if (unlikely(!p))
5115 goto out_overflow;
5116 limit_type = be32_to_cpup(p++);
5117 switch (limit_type) {
5118 case NFS4_LIMIT_SIZE:
5119 xdr_decode_hyper(p, &maxsize);
5120 break;
5121 case NFS4_LIMIT_BLOCKS:
5122 nblocks = be32_to_cpup(p++);
5123 blocksize = be32_to_cpup(p);
5124 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5125 }
5126 maxsize >>= PAGE_SHIFT;
5127 *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5128 return 0;
5129 out_overflow:
5130 print_overflow_msg(__func__, xdr);
5131 return -EIO;
5132 }
5133
5134 static int decode_rw_delegation(struct xdr_stream *xdr,
5135 uint32_t delegation_type,
5136 struct nfs_openres *res)
5137 {
5138 __be32 *p;
5139 int status;
5140
5141 status = decode_delegation_stateid(xdr, &res->delegation);
5142 if (unlikely(status))
5143 return status;
5144 p = xdr_inline_decode(xdr, 4);
5145 if (unlikely(!p))
5146 goto out_overflow;
5147 res->do_recall = be32_to_cpup(p);
5148
5149 switch (delegation_type) {
5150 case NFS4_OPEN_DELEGATE_READ:
5151 res->delegation_type = FMODE_READ;
5152 break;
5153 case NFS4_OPEN_DELEGATE_WRITE:
5154 res->delegation_type = FMODE_WRITE|FMODE_READ;
5155 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5156 return -EIO;
5157 }
5158 return decode_ace(xdr, NULL);
5159 out_overflow:
5160 print_overflow_msg(__func__, xdr);
5161 return -EIO;
5162 }
5163
5164 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5165 {
5166 __be32 *p;
5167 uint32_t why_no_delegation;
5168
5169 p = xdr_inline_decode(xdr, 4);
5170 if (unlikely(!p))
5171 goto out_overflow;
5172 why_no_delegation = be32_to_cpup(p);
5173 switch (why_no_delegation) {
5174 case WND4_CONTENTION:
5175 case WND4_RESOURCE:
5176 xdr_inline_decode(xdr, 4);
5177 /* Ignore for now */
5178 }
5179 return 0;
5180 out_overflow:
5181 print_overflow_msg(__func__, xdr);
5182 return -EIO;
5183 }
5184
5185 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5186 {
5187 __be32 *p;
5188 uint32_t delegation_type;
5189
5190 p = xdr_inline_decode(xdr, 4);
5191 if (unlikely(!p))
5192 goto out_overflow;
5193 delegation_type = be32_to_cpup(p);
5194 res->delegation_type = 0;
5195 switch (delegation_type) {
5196 case NFS4_OPEN_DELEGATE_NONE:
5197 return 0;
5198 case NFS4_OPEN_DELEGATE_READ:
5199 case NFS4_OPEN_DELEGATE_WRITE:
5200 return decode_rw_delegation(xdr, delegation_type, res);
5201 case NFS4_OPEN_DELEGATE_NONE_EXT:
5202 return decode_no_delegation(xdr, res);
5203 }
5204 return -EIO;
5205 out_overflow:
5206 print_overflow_msg(__func__, xdr);
5207 return -EIO;
5208 }
5209
5210 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5211 {
5212 __be32 *p;
5213 uint32_t savewords, bmlen, i;
5214 int status;
5215
5216 if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5217 return status;
5218 nfs_increment_open_seqid(status, res->seqid);
5219 if (status)
5220 return status;
5221 status = decode_open_stateid(xdr, &res->stateid);
5222 if (unlikely(status))
5223 return status;
5224
5225 decode_change_info(xdr, &res->cinfo);
5226
5227 p = xdr_inline_decode(xdr, 8);
5228 if (unlikely(!p))
5229 goto out_overflow;
5230 res->rflags = be32_to_cpup(p++);
5231 bmlen = be32_to_cpup(p);
5232 if (bmlen > 10)
5233 goto xdr_error;
5234
5235 p = xdr_inline_decode(xdr, bmlen << 2);
5236 if (unlikely(!p))
5237 goto out_overflow;
5238 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5239 for (i = 0; i < savewords; ++i)
5240 res->attrset[i] = be32_to_cpup(p++);
5241 for (; i < NFS4_BITMAP_SIZE; i++)
5242 res->attrset[i] = 0;
5243
5244 return decode_delegation(xdr, res);
5245 xdr_error:
5246 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5247 return -EIO;
5248 out_overflow:
5249 print_overflow_msg(__func__, xdr);
5250 return -EIO;
5251 }
5252
5253 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5254 {
5255 int status;
5256
5257 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5258 if (status != -EIO)
5259 nfs_increment_open_seqid(status, res->seqid);
5260 if (!status)
5261 status = decode_open_stateid(xdr, &res->stateid);
5262 return status;
5263 }
5264
5265 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5266 {
5267 int status;
5268
5269 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5270 if (status != -EIO)
5271 nfs_increment_open_seqid(status, res->seqid);
5272 if (!status)
5273 status = decode_open_stateid(xdr, &res->stateid);
5274 return status;
5275 }
5276
5277 static int decode_putfh(struct xdr_stream *xdr)
5278 {
5279 return decode_op_hdr(xdr, OP_PUTFH);
5280 }
5281
5282 static int decode_putrootfh(struct xdr_stream *xdr)
5283 {
5284 return decode_op_hdr(xdr, OP_PUTROOTFH);
5285 }
5286
5287 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5288 struct nfs_pgio_res *res)
5289 {
5290 __be32 *p;
5291 uint32_t count, eof, recvd;
5292 int status;
5293
5294 status = decode_op_hdr(xdr, OP_READ);
5295 if (status)
5296 return status;
5297 p = xdr_inline_decode(xdr, 8);
5298 if (unlikely(!p))
5299 goto out_overflow;
5300 eof = be32_to_cpup(p++);
5301 count = be32_to_cpup(p);
5302 recvd = xdr_read_pages(xdr, count);
5303 if (count > recvd) {
5304 dprintk("NFS: server cheating in read reply: "
5305 "count %u > recvd %u\n", count, recvd);
5306 count = recvd;
5307 eof = 0;
5308 }
5309 res->eof = eof;
5310 res->count = count;
5311 return 0;
5312 out_overflow:
5313 print_overflow_msg(__func__, xdr);
5314 return -EIO;
5315 }
5316
5317 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5318 {
5319 int status;
5320 __be32 verf[2];
5321
5322 status = decode_op_hdr(xdr, OP_READDIR);
5323 if (!status)
5324 status = decode_verifier(xdr, readdir->verifier.data);
5325 if (unlikely(status))
5326 return status;
5327 memcpy(verf, readdir->verifier.data, sizeof(verf));
5328 dprintk("%s: verifier = %08x:%08x\n",
5329 __func__, verf[0], verf[1]);
5330 return xdr_read_pages(xdr, xdr->buf->page_len);
5331 }
5332
5333 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5334 {
5335 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5336 u32 len, recvd;
5337 __be32 *p;
5338 int status;
5339
5340 status = decode_op_hdr(xdr, OP_READLINK);
5341 if (status)
5342 return status;
5343
5344 /* Convert length of symlink */
5345 p = xdr_inline_decode(xdr, 4);
5346 if (unlikely(!p))
5347 goto out_overflow;
5348 len = be32_to_cpup(p);
5349 if (len >= rcvbuf->page_len || len <= 0) {
5350 dprintk("nfs: server returned giant symlink!\n");
5351 return -ENAMETOOLONG;
5352 }
5353 recvd = xdr_read_pages(xdr, len);
5354 if (recvd < len) {
5355 dprintk("NFS: server cheating in readlink reply: "
5356 "count %u > recvd %u\n", len, recvd);
5357 return -EIO;
5358 }
5359 /*
5360 * The XDR encode routine has set things up so that
5361 * the link text will be copied directly into the
5362 * buffer. We just have to do overflow-checking,
5363 * and and null-terminate the text (the VFS expects
5364 * null-termination).
5365 */
5366 xdr_terminate_string(rcvbuf, len);
5367 return 0;
5368 out_overflow:
5369 print_overflow_msg(__func__, xdr);
5370 return -EIO;
5371 }
5372
5373 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5374 {
5375 int status;
5376
5377 status = decode_op_hdr(xdr, OP_REMOVE);
5378 if (status)
5379 goto out;
5380 status = decode_change_info(xdr, cinfo);
5381 out:
5382 return status;
5383 }
5384
5385 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5386 struct nfs4_change_info *new_cinfo)
5387 {
5388 int status;
5389
5390 status = decode_op_hdr(xdr, OP_RENAME);
5391 if (status)
5392 goto out;
5393 if ((status = decode_change_info(xdr, old_cinfo)))
5394 goto out;
5395 status = decode_change_info(xdr, new_cinfo);
5396 out:
5397 return status;
5398 }
5399
5400 static int decode_renew(struct xdr_stream *xdr)
5401 {
5402 return decode_op_hdr(xdr, OP_RENEW);
5403 }
5404
5405 static int
5406 decode_restorefh(struct xdr_stream *xdr)
5407 {
5408 return decode_op_hdr(xdr, OP_RESTOREFH);
5409 }
5410
5411 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5412 struct nfs_getaclres *res)
5413 {
5414 unsigned int savep;
5415 uint32_t attrlen,
5416 bitmap[3] = {0};
5417 int status;
5418 unsigned int pg_offset;
5419
5420 res->acl_len = 0;
5421 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5422 goto out;
5423
5424 xdr_enter_page(xdr, xdr->buf->page_len);
5425
5426 /* Calculate the offset of the page data */
5427 pg_offset = xdr->buf->head[0].iov_len;
5428
5429 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5430 goto out;
5431 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5432 goto out;
5433
5434 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5435 return -EIO;
5436 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5437
5438 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5439 * are stored with the acl data to handle the problem of
5440 * variable length bitmaps.*/
5441 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5442 res->acl_len = attrlen;
5443
5444 /* Check for receive buffer overflow */
5445 if (res->acl_len > (xdr->nwords << 2) ||
5446 res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5447 res->acl_flags |= NFS4_ACL_TRUNC;
5448 dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5449 attrlen, xdr->nwords << 2);
5450 }
5451 } else
5452 status = -EOPNOTSUPP;
5453
5454 out:
5455 return status;
5456 }
5457
5458 static int
5459 decode_savefh(struct xdr_stream *xdr)
5460 {
5461 return decode_op_hdr(xdr, OP_SAVEFH);
5462 }
5463
5464 static int decode_setattr(struct xdr_stream *xdr)
5465 {
5466 __be32 *p;
5467 uint32_t bmlen;
5468 int status;
5469
5470 status = decode_op_hdr(xdr, OP_SETATTR);
5471 if (status)
5472 return status;
5473 p = xdr_inline_decode(xdr, 4);
5474 if (unlikely(!p))
5475 goto out_overflow;
5476 bmlen = be32_to_cpup(p);
5477 p = xdr_inline_decode(xdr, bmlen << 2);
5478 if (likely(p))
5479 return 0;
5480 out_overflow:
5481 print_overflow_msg(__func__, xdr);
5482 return -EIO;
5483 }
5484
5485 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5486 {
5487 __be32 *p;
5488 uint32_t opnum;
5489 int32_t nfserr;
5490
5491 p = xdr_inline_decode(xdr, 8);
5492 if (unlikely(!p))
5493 goto out_overflow;
5494 opnum = be32_to_cpup(p++);
5495 if (opnum != OP_SETCLIENTID) {
5496 dprintk("nfs: decode_setclientid: Server returned operation"
5497 " %d\n", opnum);
5498 return -EIO;
5499 }
5500 nfserr = be32_to_cpup(p);
5501 if (nfserr == NFS_OK) {
5502 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5503 if (unlikely(!p))
5504 goto out_overflow;
5505 p = xdr_decode_hyper(p, &res->clientid);
5506 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5507 } else if (nfserr == NFSERR_CLID_INUSE) {
5508 uint32_t len;
5509
5510 /* skip netid string */
5511 p = xdr_inline_decode(xdr, 4);
5512 if (unlikely(!p))
5513 goto out_overflow;
5514 len = be32_to_cpup(p);
5515 p = xdr_inline_decode(xdr, len);
5516 if (unlikely(!p))
5517 goto out_overflow;
5518
5519 /* skip uaddr string */
5520 p = xdr_inline_decode(xdr, 4);
5521 if (unlikely(!p))
5522 goto out_overflow;
5523 len = be32_to_cpup(p);
5524 p = xdr_inline_decode(xdr, len);
5525 if (unlikely(!p))
5526 goto out_overflow;
5527 return -NFSERR_CLID_INUSE;
5528 } else
5529 return nfs4_stat_to_errno(nfserr);
5530
5531 return 0;
5532 out_overflow:
5533 print_overflow_msg(__func__, xdr);
5534 return -EIO;
5535 }
5536
5537 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5538 {
5539 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5540 }
5541
5542 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5543 {
5544 __be32 *p;
5545 int status;
5546
5547 status = decode_op_hdr(xdr, OP_WRITE);
5548 if (status)
5549 return status;
5550
5551 p = xdr_inline_decode(xdr, 8);
5552 if (unlikely(!p))
5553 goto out_overflow;
5554 res->count = be32_to_cpup(p++);
5555 res->verf->committed = be32_to_cpup(p++);
5556 return decode_write_verifier(xdr, &res->verf->verifier);
5557 out_overflow:
5558 print_overflow_msg(__func__, xdr);
5559 return -EIO;
5560 }
5561
5562 static int decode_delegreturn(struct xdr_stream *xdr)
5563 {
5564 return decode_op_hdr(xdr, OP_DELEGRETURN);
5565 }
5566
5567 static int decode_secinfo_gss(struct xdr_stream *xdr,
5568 struct nfs4_secinfo4 *flavor)
5569 {
5570 u32 oid_len;
5571 __be32 *p;
5572
5573 p = xdr_inline_decode(xdr, 4);
5574 if (unlikely(!p))
5575 goto out_overflow;
5576 oid_len = be32_to_cpup(p);
5577 if (oid_len > GSS_OID_MAX_LEN)
5578 goto out_err;
5579
5580 p = xdr_inline_decode(xdr, oid_len);
5581 if (unlikely(!p))
5582 goto out_overflow;
5583 memcpy(flavor->flavor_info.oid.data, p, oid_len);
5584 flavor->flavor_info.oid.len = oid_len;
5585
5586 p = xdr_inline_decode(xdr, 8);
5587 if (unlikely(!p))
5588 goto out_overflow;
5589 flavor->flavor_info.qop = be32_to_cpup(p++);
5590 flavor->flavor_info.service = be32_to_cpup(p);
5591
5592 return 0;
5593
5594 out_overflow:
5595 print_overflow_msg(__func__, xdr);
5596 return -EIO;
5597 out_err:
5598 return -EINVAL;
5599 }
5600
5601 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5602 {
5603 struct nfs4_secinfo4 *sec_flavor;
5604 unsigned int i, num_flavors;
5605 int status;
5606 __be32 *p;
5607
5608 p = xdr_inline_decode(xdr, 4);
5609 if (unlikely(!p))
5610 goto out_overflow;
5611
5612 res->flavors->num_flavors = 0;
5613 num_flavors = be32_to_cpup(p);
5614
5615 for (i = 0; i < num_flavors; i++) {
5616 sec_flavor = &res->flavors->flavors[i];
5617 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5618 break;
5619
5620 p = xdr_inline_decode(xdr, 4);
5621 if (unlikely(!p))
5622 goto out_overflow;
5623 sec_flavor->flavor = be32_to_cpup(p);
5624
5625 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5626 status = decode_secinfo_gss(xdr, sec_flavor);
5627 if (status)
5628 goto out;
5629 }
5630 res->flavors->num_flavors++;
5631 }
5632
5633 status = 0;
5634 out:
5635 return status;
5636 out_overflow:
5637 print_overflow_msg(__func__, xdr);
5638 return -EIO;
5639 }
5640
5641 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5642 {
5643 int status = decode_op_hdr(xdr, OP_SECINFO);
5644 if (status)
5645 return status;
5646 return decode_secinfo_common(xdr, res);
5647 }
5648
5649 #if defined(CONFIG_NFS_V4_1)
5650 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5651 {
5652 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5653 if (status)
5654 return status;
5655 return decode_secinfo_common(xdr, res);
5656 }
5657
5658 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5659 {
5660 __be32 *p;
5661 uint32_t bitmap_words;
5662 unsigned int i;
5663
5664 p = xdr_inline_decode(xdr, 4);
5665 if (!p)
5666 return -EIO;
5667 bitmap_words = be32_to_cpup(p++);
5668 if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5669 return -EIO;
5670 p = xdr_inline_decode(xdr, 4 * bitmap_words);
5671 for (i = 0; i < bitmap_words; i++)
5672 op_map->u.words[i] = be32_to_cpup(p++);
5673
5674 return 0;
5675 }
5676
5677 static int decode_exchange_id(struct xdr_stream *xdr,
5678 struct nfs41_exchange_id_res *res)
5679 {
5680 __be32 *p;
5681 uint32_t dummy;
5682 char *dummy_str;
5683 int status;
5684 uint32_t impl_id_count;
5685
5686 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5687 if (status)
5688 return status;
5689
5690 p = xdr_inline_decode(xdr, 8);
5691 if (unlikely(!p))
5692 goto out_overflow;
5693 xdr_decode_hyper(p, &res->clientid);
5694 p = xdr_inline_decode(xdr, 12);
5695 if (unlikely(!p))
5696 goto out_overflow;
5697 res->seqid = be32_to_cpup(p++);
5698 res->flags = be32_to_cpup(p++);
5699
5700 res->state_protect.how = be32_to_cpup(p);
5701 switch (res->state_protect.how) {
5702 case SP4_NONE:
5703 break;
5704 case SP4_MACH_CRED:
5705 status = decode_op_map(xdr, &res->state_protect.enforce);
5706 if (status)
5707 return status;
5708 status = decode_op_map(xdr, &res->state_protect.allow);
5709 if (status)
5710 return status;
5711 break;
5712 default:
5713 WARN_ON_ONCE(1);
5714 return -EIO;
5715 }
5716
5717 /* server_owner4.so_minor_id */
5718 p = xdr_inline_decode(xdr, 8);
5719 if (unlikely(!p))
5720 goto out_overflow;
5721 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5722
5723 /* server_owner4.so_major_id */
5724 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5725 if (unlikely(status))
5726 return status;
5727 memcpy(res->server_owner->major_id, dummy_str, dummy);
5728 res->server_owner->major_id_sz = dummy;
5729
5730 /* server_scope4 */
5731 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5732 if (unlikely(status))
5733 return status;
5734 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5735 res->server_scope->server_scope_sz = dummy;
5736
5737 /* Implementation Id */
5738 p = xdr_inline_decode(xdr, 4);
5739 if (unlikely(!p))
5740 goto out_overflow;
5741 impl_id_count = be32_to_cpup(p++);
5742
5743 if (impl_id_count) {
5744 /* nii_domain */
5745 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5746 if (unlikely(status))
5747 return status;
5748 memcpy(res->impl_id->domain, dummy_str, dummy);
5749
5750 /* nii_name */
5751 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5752 if (unlikely(status))
5753 return status;
5754 memcpy(res->impl_id->name, dummy_str, dummy);
5755
5756 /* nii_date */
5757 p = xdr_inline_decode(xdr, 12);
5758 if (unlikely(!p))
5759 goto out_overflow;
5760 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5761 res->impl_id->date.nseconds = be32_to_cpup(p);
5762
5763 /* if there's more than one entry, ignore the rest */
5764 }
5765 return 0;
5766 out_overflow:
5767 print_overflow_msg(__func__, xdr);
5768 return -EIO;
5769 }
5770
5771 static int decode_chan_attrs(struct xdr_stream *xdr,
5772 struct nfs4_channel_attrs *attrs)
5773 {
5774 __be32 *p;
5775 u32 nr_attrs, val;
5776
5777 p = xdr_inline_decode(xdr, 28);
5778 if (unlikely(!p))
5779 goto out_overflow;
5780 val = be32_to_cpup(p++); /* headerpadsz */
5781 if (val)
5782 return -EINVAL; /* no support for header padding yet */
5783 attrs->max_rqst_sz = be32_to_cpup(p++);
5784 attrs->max_resp_sz = be32_to_cpup(p++);
5785 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5786 attrs->max_ops = be32_to_cpup(p++);
5787 attrs->max_reqs = be32_to_cpup(p++);
5788 nr_attrs = be32_to_cpup(p);
5789 if (unlikely(nr_attrs > 1)) {
5790 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5791 "count %u\n", __func__, nr_attrs);
5792 return -EINVAL;
5793 }
5794 if (nr_attrs == 1) {
5795 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5796 if (unlikely(!p))
5797 goto out_overflow;
5798 }
5799 return 0;
5800 out_overflow:
5801 print_overflow_msg(__func__, xdr);
5802 return -EIO;
5803 }
5804
5805 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5806 {
5807 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5808 }
5809
5810 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5811 struct nfs41_bind_conn_to_session_res *res)
5812 {
5813 __be32 *p;
5814 int status;
5815
5816 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5817 if (!status)
5818 status = decode_sessionid(xdr, &res->sessionid);
5819 if (unlikely(status))
5820 return status;
5821
5822 /* dir flags, rdma mode bool */
5823 p = xdr_inline_decode(xdr, 8);
5824 if (unlikely(!p))
5825 goto out_overflow;
5826
5827 res->dir = be32_to_cpup(p++);
5828 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5829 return -EIO;
5830 if (be32_to_cpup(p) == 0)
5831 res->use_conn_in_rdma_mode = false;
5832 else
5833 res->use_conn_in_rdma_mode = true;
5834
5835 return 0;
5836 out_overflow:
5837 print_overflow_msg(__func__, xdr);
5838 return -EIO;
5839 }
5840
5841 static int decode_create_session(struct xdr_stream *xdr,
5842 struct nfs41_create_session_res *res)
5843 {
5844 __be32 *p;
5845 int status;
5846
5847 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5848 if (!status)
5849 status = decode_sessionid(xdr, &res->sessionid);
5850 if (unlikely(status))
5851 return status;
5852
5853 /* seqid, flags */
5854 p = xdr_inline_decode(xdr, 8);
5855 if (unlikely(!p))
5856 goto out_overflow;
5857 res->seqid = be32_to_cpup(p++);
5858 res->flags = be32_to_cpup(p);
5859
5860 /* Channel attributes */
5861 status = decode_chan_attrs(xdr, &res->fc_attrs);
5862 if (!status)
5863 status = decode_chan_attrs(xdr, &res->bc_attrs);
5864 return status;
5865 out_overflow:
5866 print_overflow_msg(__func__, xdr);
5867 return -EIO;
5868 }
5869
5870 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5871 {
5872 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5873 }
5874
5875 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5876 {
5877 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5878 }
5879
5880 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5881 {
5882 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5883 }
5884 #endif /* CONFIG_NFS_V4_1 */
5885
5886 static int decode_sequence(struct xdr_stream *xdr,
5887 struct nfs4_sequence_res *res,
5888 struct rpc_rqst *rqstp)
5889 {
5890 #if defined(CONFIG_NFS_V4_1)
5891 struct nfs4_session *session;
5892 struct nfs4_sessionid id;
5893 u32 dummy;
5894 int status;
5895 __be32 *p;
5896
5897 if (res->sr_slot == NULL)
5898 return 0;
5899 if (!res->sr_slot->table->session)
5900 return 0;
5901
5902 status = decode_op_hdr(xdr, OP_SEQUENCE);
5903 if (!status)
5904 status = decode_sessionid(xdr, &id);
5905 if (unlikely(status))
5906 goto out_err;
5907
5908 /*
5909 * If the server returns different values for sessionID, slotID or
5910 * sequence number, the server is looney tunes.
5911 */
5912 status = -EREMOTEIO;
5913 session = res->sr_slot->table->session;
5914
5915 if (memcmp(id.data, session->sess_id.data,
5916 NFS4_MAX_SESSIONID_LEN)) {
5917 dprintk("%s Invalid session id\n", __func__);
5918 goto out_err;
5919 }
5920
5921 p = xdr_inline_decode(xdr, 20);
5922 if (unlikely(!p))
5923 goto out_overflow;
5924
5925 /* seqid */
5926 dummy = be32_to_cpup(p++);
5927 if (dummy != res->sr_slot->seq_nr) {
5928 dprintk("%s Invalid sequence number\n", __func__);
5929 goto out_err;
5930 }
5931 /* slot id */
5932 dummy = be32_to_cpup(p++);
5933 if (dummy != res->sr_slot->slot_nr) {
5934 dprintk("%s Invalid slot id\n", __func__);
5935 goto out_err;
5936 }
5937 /* highest slot id */
5938 res->sr_highest_slotid = be32_to_cpup(p++);
5939 /* target highest slot id */
5940 res->sr_target_highest_slotid = be32_to_cpup(p++);
5941 /* result flags */
5942 res->sr_status_flags = be32_to_cpup(p);
5943 status = 0;
5944 out_err:
5945 res->sr_status = status;
5946 return status;
5947 out_overflow:
5948 print_overflow_msg(__func__, xdr);
5949 status = -EIO;
5950 goto out_err;
5951 #else /* CONFIG_NFS_V4_1 */
5952 return 0;
5953 #endif /* CONFIG_NFS_V4_1 */
5954 }
5955
5956 #if defined(CONFIG_NFS_V4_1)
5957 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5958 {
5959 stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5960 return decode_stateid(xdr, stateid);
5961 }
5962
5963 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5964 struct nfs4_getdeviceinfo_res *res)
5965 {
5966 struct pnfs_device *pdev = res->pdev;
5967 __be32 *p;
5968 uint32_t len, type;
5969 int status;
5970
5971 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5972 if (status) {
5973 if (status == -ETOOSMALL) {
5974 p = xdr_inline_decode(xdr, 4);
5975 if (unlikely(!p))
5976 goto out_overflow;
5977 pdev->mincount = be32_to_cpup(p);
5978 dprintk("%s: Min count too small. mincnt = %u\n",
5979 __func__, pdev->mincount);
5980 }
5981 return status;
5982 }
5983
5984 p = xdr_inline_decode(xdr, 8);
5985 if (unlikely(!p))
5986 goto out_overflow;
5987 type = be32_to_cpup(p++);
5988 if (type != pdev->layout_type) {
5989 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5990 __func__, pdev->layout_type, type);
5991 return -EINVAL;
5992 }
5993 /*
5994 * Get the length of the opaque device_addr4. xdr_read_pages places
5995 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5996 * and places the remaining xdr data in xdr_buf->tail
5997 */
5998 pdev->mincount = be32_to_cpup(p);
5999 if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
6000 goto out_overflow;
6001
6002 /* Parse notification bitmap, verifying that it is zero. */
6003 p = xdr_inline_decode(xdr, 4);
6004 if (unlikely(!p))
6005 goto out_overflow;
6006 len = be32_to_cpup(p);
6007 if (len) {
6008 uint32_t i;
6009
6010 p = xdr_inline_decode(xdr, 4 * len);
6011 if (unlikely(!p))
6012 goto out_overflow;
6013
6014 res->notification = be32_to_cpup(p++);
6015 for (i = 1; i < len; i++) {
6016 if (be32_to_cpup(p++)) {
6017 dprintk("%s: unsupported notification\n",
6018 __func__);
6019 return -EIO;
6020 }
6021 }
6022 }
6023 return 0;
6024 out_overflow:
6025 print_overflow_msg(__func__, xdr);
6026 return -EIO;
6027 }
6028
6029 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6030 struct nfs4_layoutget_res *res)
6031 {
6032 __be32 *p;
6033 int status;
6034 u32 layout_count;
6035 u32 recvd;
6036
6037 status = decode_op_hdr(xdr, OP_LAYOUTGET);
6038 if (status)
6039 return status;
6040 p = xdr_inline_decode(xdr, 4);
6041 if (unlikely(!p))
6042 goto out_overflow;
6043 res->return_on_close = be32_to_cpup(p);
6044 decode_layout_stateid(xdr, &res->stateid);
6045 p = xdr_inline_decode(xdr, 4);
6046 if (unlikely(!p))
6047 goto out_overflow;
6048 layout_count = be32_to_cpup(p);
6049 if (!layout_count) {
6050 dprintk("%s: server responded with empty layout array\n",
6051 __func__);
6052 return -EINVAL;
6053 }
6054
6055 p = xdr_inline_decode(xdr, 28);
6056 if (unlikely(!p))
6057 goto out_overflow;
6058 p = xdr_decode_hyper(p, &res->range.offset);
6059 p = xdr_decode_hyper(p, &res->range.length);
6060 res->range.iomode = be32_to_cpup(p++);
6061 res->type = be32_to_cpup(p++);
6062 res->layoutp->len = be32_to_cpup(p);
6063
6064 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
6065 __func__,
6066 (unsigned long)res->range.offset,
6067 (unsigned long)res->range.length,
6068 res->range.iomode,
6069 res->type,
6070 res->layoutp->len);
6071
6072 recvd = xdr_read_pages(xdr, res->layoutp->len);
6073 if (res->layoutp->len > recvd) {
6074 dprintk("NFS: server cheating in layoutget reply: "
6075 "layout len %u > recvd %u\n",
6076 res->layoutp->len, recvd);
6077 return -EINVAL;
6078 }
6079
6080 if (layout_count > 1) {
6081 /* We only handle a length one array at the moment. Any
6082 * further entries are just ignored. Note that this means
6083 * the client may see a response that is less than the
6084 * minimum it requested.
6085 */
6086 dprintk("%s: server responded with %d layouts, dropping tail\n",
6087 __func__, layout_count);
6088 }
6089
6090 return 0;
6091 out_overflow:
6092 print_overflow_msg(__func__, xdr);
6093 return -EIO;
6094 }
6095
6096 static int decode_layoutreturn(struct xdr_stream *xdr,
6097 struct nfs4_layoutreturn_res *res)
6098 {
6099 __be32 *p;
6100 int status;
6101
6102 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6103 if (status)
6104 return status;
6105 p = xdr_inline_decode(xdr, 4);
6106 if (unlikely(!p))
6107 goto out_overflow;
6108 res->lrs_present = be32_to_cpup(p);
6109 if (res->lrs_present)
6110 status = decode_layout_stateid(xdr, &res->stateid);
6111 return status;
6112 out_overflow:
6113 print_overflow_msg(__func__, xdr);
6114 return -EIO;
6115 }
6116
6117 static int decode_layoutcommit(struct xdr_stream *xdr,
6118 struct rpc_rqst *req,
6119 struct nfs4_layoutcommit_res *res)
6120 {
6121 __be32 *p;
6122 __u32 sizechanged;
6123 int status;
6124
6125 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6126 res->status = status;
6127 if (status)
6128 return status;
6129
6130 p = xdr_inline_decode(xdr, 4);
6131 if (unlikely(!p))
6132 goto out_overflow;
6133 sizechanged = be32_to_cpup(p);
6134
6135 if (sizechanged) {
6136 /* throw away new size */
6137 p = xdr_inline_decode(xdr, 8);
6138 if (unlikely(!p))
6139 goto out_overflow;
6140 }
6141 return 0;
6142 out_overflow:
6143 print_overflow_msg(__func__, xdr);
6144 return -EIO;
6145 }
6146
6147 static int decode_test_stateid(struct xdr_stream *xdr,
6148 struct nfs41_test_stateid_res *res)
6149 {
6150 __be32 *p;
6151 int status;
6152 int num_res;
6153
6154 status = decode_op_hdr(xdr, OP_TEST_STATEID);
6155 if (status)
6156 return status;
6157
6158 p = xdr_inline_decode(xdr, 4);
6159 if (unlikely(!p))
6160 goto out_overflow;
6161 num_res = be32_to_cpup(p++);
6162 if (num_res != 1)
6163 goto out;
6164
6165 p = xdr_inline_decode(xdr, 4);
6166 if (unlikely(!p))
6167 goto out_overflow;
6168 res->status = be32_to_cpup(p++);
6169
6170 return status;
6171 out_overflow:
6172 print_overflow_msg(__func__, xdr);
6173 out:
6174 return -EIO;
6175 }
6176
6177 static int decode_free_stateid(struct xdr_stream *xdr,
6178 struct nfs41_free_stateid_res *res)
6179 {
6180 res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6181 return res->status;
6182 }
6183 #else
6184 static inline
6185 int decode_layoutreturn(struct xdr_stream *xdr,
6186 struct nfs4_layoutreturn_res *res)
6187 {
6188 return 0;
6189 }
6190 #endif /* CONFIG_NFS_V4_1 */
6191
6192 /*
6193 * END OF "GENERIC" DECODE ROUTINES.
6194 */
6195
6196 /*
6197 * Decode OPEN_DOWNGRADE response
6198 */
6199 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6200 struct xdr_stream *xdr,
6201 void *data)
6202 {
6203 struct nfs_closeres *res = data;
6204 struct compound_hdr hdr;
6205 int status;
6206
6207 status = decode_compound_hdr(xdr, &hdr);
6208 if (status)
6209 goto out;
6210 status = decode_sequence(xdr, &res->seq_res, rqstp);
6211 if (status)
6212 goto out;
6213 status = decode_putfh(xdr);
6214 if (status)
6215 goto out;
6216 if (res->lr_res) {
6217 status = decode_layoutreturn(xdr, res->lr_res);
6218 res->lr_ret = status;
6219 if (status)
6220 goto out;
6221 }
6222 status = decode_open_downgrade(xdr, res);
6223 out:
6224 return status;
6225 }
6226
6227 /*
6228 * Decode ACCESS response
6229 */
6230 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6231 void *data)
6232 {
6233 struct nfs4_accessres *res = data;
6234 struct compound_hdr hdr;
6235 int status;
6236
6237 status = decode_compound_hdr(xdr, &hdr);
6238 if (status)
6239 goto out;
6240 status = decode_sequence(xdr, &res->seq_res, rqstp);
6241 if (status)
6242 goto out;
6243 status = decode_putfh(xdr);
6244 if (status != 0)
6245 goto out;
6246 status = decode_access(xdr, &res->supported, &res->access);
6247 if (status != 0)
6248 goto out;
6249 decode_getfattr(xdr, res->fattr, res->server);
6250 out:
6251 return status;
6252 }
6253
6254 /*
6255 * Decode LOOKUP response
6256 */
6257 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6258 void *data)
6259 {
6260 struct nfs4_lookup_res *res = data;
6261 struct compound_hdr hdr;
6262 int status;
6263
6264 status = decode_compound_hdr(xdr, &hdr);
6265 if (status)
6266 goto out;
6267 status = decode_sequence(xdr, &res->seq_res, rqstp);
6268 if (status)
6269 goto out;
6270 status = decode_putfh(xdr);
6271 if (status)
6272 goto out;
6273 status = decode_lookup(xdr);
6274 if (status)
6275 goto out;
6276 status = decode_getfh(xdr, res->fh);
6277 if (status)
6278 goto out;
6279 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6280 out:
6281 return status;
6282 }
6283
6284 /*
6285 * Decode LOOKUPP response
6286 */
6287 static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6288 void *data)
6289 {
6290 struct nfs4_lookupp_res *res = data;
6291 struct compound_hdr hdr;
6292 int status;
6293
6294 status = decode_compound_hdr(xdr, &hdr);
6295 if (status)
6296 goto out;
6297 status = decode_sequence(xdr, &res->seq_res, rqstp);
6298 if (status)
6299 goto out;
6300 status = decode_putfh(xdr);
6301 if (status)
6302 goto out;
6303 status = decode_lookupp(xdr);
6304 if (status)
6305 goto out;
6306 status = decode_getfh(xdr, res->fh);
6307 if (status)
6308 goto out;
6309 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6310 out:
6311 return status;
6312 }
6313
6314 /*
6315 * Decode LOOKUP_ROOT response
6316 */
6317 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6318 struct xdr_stream *xdr,
6319 void *data)
6320 {
6321 struct nfs4_lookup_res *res = data;
6322 struct compound_hdr hdr;
6323 int status;
6324
6325 status = decode_compound_hdr(xdr, &hdr);
6326 if (status)
6327 goto out;
6328 status = decode_sequence(xdr, &res->seq_res, rqstp);
6329 if (status)
6330 goto out;
6331 status = decode_putrootfh(xdr);
6332 if (status)
6333 goto out;
6334 status = decode_getfh(xdr, res->fh);
6335 if (status == 0)
6336 status = decode_getfattr_label(xdr, res->fattr,
6337 res->label, res->server);
6338 out:
6339 return status;
6340 }
6341
6342 /*
6343 * Decode REMOVE response
6344 */
6345 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6346 void *data)
6347 {
6348 struct nfs_removeres *res = data;
6349 struct compound_hdr hdr;
6350 int status;
6351
6352 status = decode_compound_hdr(xdr, &hdr);
6353 if (status)
6354 goto out;
6355 status = decode_sequence(xdr, &res->seq_res, rqstp);
6356 if (status)
6357 goto out;
6358 status = decode_putfh(xdr);
6359 if (status)
6360 goto out;
6361 status = decode_remove(xdr, &res->cinfo);
6362 out:
6363 return status;
6364 }
6365
6366 /*
6367 * Decode RENAME response
6368 */
6369 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6370 void *data)
6371 {
6372 struct nfs_renameres *res = data;
6373 struct compound_hdr hdr;
6374 int status;
6375
6376 status = decode_compound_hdr(xdr, &hdr);
6377 if (status)
6378 goto out;
6379 status = decode_sequence(xdr, &res->seq_res, rqstp);
6380 if (status)
6381 goto out;
6382 status = decode_putfh(xdr);
6383 if (status)
6384 goto out;
6385 status = decode_savefh(xdr);
6386 if (status)
6387 goto out;
6388 status = decode_putfh(xdr);
6389 if (status)
6390 goto out;
6391 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6392 out:
6393 return status;
6394 }
6395
6396 /*
6397 * Decode LINK response
6398 */
6399 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6400 void *data)
6401 {
6402 struct nfs4_link_res *res = data;
6403 struct compound_hdr hdr;
6404 int status;
6405
6406 status = decode_compound_hdr(xdr, &hdr);
6407 if (status)
6408 goto out;
6409 status = decode_sequence(xdr, &res->seq_res, rqstp);
6410 if (status)
6411 goto out;
6412 status = decode_putfh(xdr);
6413 if (status)
6414 goto out;
6415 status = decode_savefh(xdr);
6416 if (status)
6417 goto out;
6418 status = decode_putfh(xdr);
6419 if (status)
6420 goto out;
6421 status = decode_link(xdr, &res->cinfo);
6422 if (status)
6423 goto out;
6424 /*
6425 * Note order: OP_LINK leaves the directory as the current
6426 * filehandle.
6427 */
6428 status = decode_restorefh(xdr);
6429 if (status)
6430 goto out;
6431 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6432 out:
6433 return status;
6434 }
6435
6436 /*
6437 * Decode CREATE response
6438 */
6439 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6440 void *data)
6441 {
6442 struct nfs4_create_res *res = data;
6443 struct compound_hdr hdr;
6444 int status;
6445
6446 status = decode_compound_hdr(xdr, &hdr);
6447 if (status)
6448 goto out;
6449 status = decode_sequence(xdr, &res->seq_res, rqstp);
6450 if (status)
6451 goto out;
6452 status = decode_putfh(xdr);
6453 if (status)
6454 goto out;
6455 status = decode_create(xdr, &res->dir_cinfo);
6456 if (status)
6457 goto out;
6458 status = decode_getfh(xdr, res->fh);
6459 if (status)
6460 goto out;
6461 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6462 out:
6463 return status;
6464 }
6465
6466 /*
6467 * Decode SYMLINK response
6468 */
6469 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6470 void *res)
6471 {
6472 return nfs4_xdr_dec_create(rqstp, xdr, res);
6473 }
6474
6475 /*
6476 * Decode GETATTR response
6477 */
6478 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6479 void *data)
6480 {
6481 struct nfs4_getattr_res *res = data;
6482 struct compound_hdr hdr;
6483 int status;
6484
6485 status = decode_compound_hdr(xdr, &hdr);
6486 if (status)
6487 goto out;
6488 status = decode_sequence(xdr, &res->seq_res, rqstp);
6489 if (status)
6490 goto out;
6491 status = decode_putfh(xdr);
6492 if (status)
6493 goto out;
6494 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6495 out:
6496 return status;
6497 }
6498
6499 /*
6500 * Encode an SETACL request
6501 */
6502 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6503 const void *data)
6504 {
6505 const struct nfs_setaclargs *args = data;
6506 struct compound_hdr hdr = {
6507 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6508 };
6509
6510 encode_compound_hdr(xdr, req, &hdr);
6511 encode_sequence(xdr, &args->seq_args, &hdr);
6512 encode_putfh(xdr, args->fh, &hdr);
6513 encode_setacl(xdr, args, &hdr);
6514 encode_nops(&hdr);
6515 }
6516
6517 /*
6518 * Decode SETACL response
6519 */
6520 static int
6521 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6522 void *data)
6523 {
6524 struct nfs_setaclres *res = data;
6525 struct compound_hdr hdr;
6526 int status;
6527
6528 status = decode_compound_hdr(xdr, &hdr);
6529 if (status)
6530 goto out;
6531 status = decode_sequence(xdr, &res->seq_res, rqstp);
6532 if (status)
6533 goto out;
6534 status = decode_putfh(xdr);
6535 if (status)
6536 goto out;
6537 status = decode_setattr(xdr);
6538 out:
6539 return status;
6540 }
6541
6542 /*
6543 * Decode GETACL response
6544 */
6545 static int
6546 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6547 void *data)
6548 {
6549 struct nfs_getaclres *res = data;
6550 struct compound_hdr hdr;
6551 int status;
6552
6553 if (res->acl_scratch != NULL) {
6554 void *p = page_address(res->acl_scratch);
6555 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6556 }
6557 status = decode_compound_hdr(xdr, &hdr);
6558 if (status)
6559 goto out;
6560 status = decode_sequence(xdr, &res->seq_res, rqstp);
6561 if (status)
6562 goto out;
6563 status = decode_putfh(xdr);
6564 if (status)
6565 goto out;
6566 status = decode_getacl(xdr, rqstp, res);
6567
6568 out:
6569 return status;
6570 }
6571
6572 /*
6573 * Decode CLOSE response
6574 */
6575 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6576 void *data)
6577 {
6578 struct nfs_closeres *res = data;
6579 struct compound_hdr hdr;
6580 int status;
6581
6582 status = decode_compound_hdr(xdr, &hdr);
6583 if (status)
6584 goto out;
6585 status = decode_sequence(xdr, &res->seq_res, rqstp);
6586 if (status)
6587 goto out;
6588 status = decode_putfh(xdr);
6589 if (status)
6590 goto out;
6591 if (res->lr_res) {
6592 status = decode_layoutreturn(xdr, res->lr_res);
6593 res->lr_ret = status;
6594 if (status)
6595 goto out;
6596 }
6597 if (res->fattr != NULL) {
6598 status = decode_getfattr(xdr, res->fattr, res->server);
6599 if (status != 0)
6600 goto out;
6601 }
6602 status = decode_close(xdr, res);
6603 out:
6604 return status;
6605 }
6606
6607 /*
6608 * Decode OPEN response
6609 */
6610 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6611 void *data)
6612 {
6613 struct nfs_openres *res = data;
6614 struct compound_hdr hdr;
6615 int status;
6616
6617 status = decode_compound_hdr(xdr, &hdr);
6618 if (status)
6619 goto out;
6620 status = decode_sequence(xdr, &res->seq_res, rqstp);
6621 if (status)
6622 goto out;
6623 status = decode_putfh(xdr);
6624 if (status)
6625 goto out;
6626 status = decode_open(xdr, res);
6627 if (status)
6628 goto out;
6629 status = decode_getfh(xdr, &res->fh);
6630 if (status)
6631 goto out;
6632 if (res->access_request)
6633 decode_access(xdr, &res->access_supported, &res->access_result);
6634 decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6635 out:
6636 return status;
6637 }
6638
6639 /*
6640 * Decode OPEN_CONFIRM response
6641 */
6642 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6643 struct xdr_stream *xdr,
6644 void *data)
6645 {
6646 struct nfs_open_confirmres *res = data;
6647 struct compound_hdr hdr;
6648 int status;
6649
6650 status = decode_compound_hdr(xdr, &hdr);
6651 if (status)
6652 goto out;
6653 status = decode_putfh(xdr);
6654 if (status)
6655 goto out;
6656 status = decode_open_confirm(xdr, res);
6657 out:
6658 return status;
6659 }
6660
6661 /*
6662 * Decode OPEN response
6663 */
6664 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6665 struct xdr_stream *xdr,
6666 void *data)
6667 {
6668 struct nfs_openres *res = data;
6669 struct compound_hdr hdr;
6670 int status;
6671
6672 status = decode_compound_hdr(xdr, &hdr);
6673 if (status)
6674 goto out;
6675 status = decode_sequence(xdr, &res->seq_res, rqstp);
6676 if (status)
6677 goto out;
6678 status = decode_putfh(xdr);
6679 if (status)
6680 goto out;
6681 status = decode_open(xdr, res);
6682 if (status)
6683 goto out;
6684 if (res->access_request)
6685 decode_access(xdr, &res->access_supported, &res->access_result);
6686 decode_getfattr(xdr, res->f_attr, res->server);
6687 out:
6688 return status;
6689 }
6690
6691 /*
6692 * Decode SETATTR response
6693 */
6694 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6695 struct xdr_stream *xdr,
6696 void *data)
6697 {
6698 struct nfs_setattrres *res = data;
6699 struct compound_hdr hdr;
6700 int status;
6701
6702 status = decode_compound_hdr(xdr, &hdr);
6703 if (status)
6704 goto out;
6705 status = decode_sequence(xdr, &res->seq_res, rqstp);
6706 if (status)
6707 goto out;
6708 status = decode_putfh(xdr);
6709 if (status)
6710 goto out;
6711 status = decode_setattr(xdr);
6712 if (status)
6713 goto out;
6714 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6715 out:
6716 return status;
6717 }
6718
6719 /*
6720 * Decode LOCK response
6721 */
6722 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6723 void *data)
6724 {
6725 struct nfs_lock_res *res = data;
6726 struct compound_hdr hdr;
6727 int status;
6728
6729 status = decode_compound_hdr(xdr, &hdr);
6730 if (status)
6731 goto out;
6732 status = decode_sequence(xdr, &res->seq_res, rqstp);
6733 if (status)
6734 goto out;
6735 status = decode_putfh(xdr);
6736 if (status)
6737 goto out;
6738 status = decode_lock(xdr, res);
6739 out:
6740 return status;
6741 }
6742
6743 /*
6744 * Decode LOCKT response
6745 */
6746 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6747 void *data)
6748 {
6749 struct nfs_lockt_res *res = data;
6750 struct compound_hdr hdr;
6751 int status;
6752
6753 status = decode_compound_hdr(xdr, &hdr);
6754 if (status)
6755 goto out;
6756 status = decode_sequence(xdr, &res->seq_res, rqstp);
6757 if (status)
6758 goto out;
6759 status = decode_putfh(xdr);
6760 if (status)
6761 goto out;
6762 status = decode_lockt(xdr, res);
6763 out:
6764 return status;
6765 }
6766
6767 /*
6768 * Decode LOCKU response
6769 */
6770 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6771 void *data)
6772 {
6773 struct nfs_locku_res *res = data;
6774 struct compound_hdr hdr;
6775 int status;
6776
6777 status = decode_compound_hdr(xdr, &hdr);
6778 if (status)
6779 goto out;
6780 status = decode_sequence(xdr, &res->seq_res, rqstp);
6781 if (status)
6782 goto out;
6783 status = decode_putfh(xdr);
6784 if (status)
6785 goto out;
6786 status = decode_locku(xdr, res);
6787 out:
6788 return status;
6789 }
6790
6791 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6792 struct xdr_stream *xdr, void *dummy)
6793 {
6794 struct compound_hdr hdr;
6795 int status;
6796
6797 status = decode_compound_hdr(xdr, &hdr);
6798 if (!status)
6799 status = decode_release_lockowner(xdr);
6800 return status;
6801 }
6802
6803 /*
6804 * Decode READLINK response
6805 */
6806 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6807 struct xdr_stream *xdr,
6808 void *data)
6809 {
6810 struct nfs4_readlink_res *res = data;
6811 struct compound_hdr hdr;
6812 int status;
6813
6814 status = decode_compound_hdr(xdr, &hdr);
6815 if (status)
6816 goto out;
6817 status = decode_sequence(xdr, &res->seq_res, rqstp);
6818 if (status)
6819 goto out;
6820 status = decode_putfh(xdr);
6821 if (status)
6822 goto out;
6823 status = decode_readlink(xdr, rqstp);
6824 out:
6825 return status;
6826 }
6827
6828 /*
6829 * Decode READDIR response
6830 */
6831 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6832 void *data)
6833 {
6834 struct nfs4_readdir_res *res = data;
6835 struct compound_hdr hdr;
6836 int status;
6837
6838 status = decode_compound_hdr(xdr, &hdr);
6839 if (status)
6840 goto out;
6841 status = decode_sequence(xdr, &res->seq_res, rqstp);
6842 if (status)
6843 goto out;
6844 status = decode_putfh(xdr);
6845 if (status)
6846 goto out;
6847 status = decode_readdir(xdr, rqstp, res);
6848 out:
6849 return status;
6850 }
6851
6852 /*
6853 * Decode Read response
6854 */
6855 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6856 void *data)
6857 {
6858 struct nfs_pgio_res *res = data;
6859 struct compound_hdr hdr;
6860 int status;
6861
6862 status = decode_compound_hdr(xdr, &hdr);
6863 res->op_status = hdr.status;
6864 if (status)
6865 goto out;
6866 status = decode_sequence(xdr, &res->seq_res, rqstp);
6867 if (status)
6868 goto out;
6869 status = decode_putfh(xdr);
6870 if (status)
6871 goto out;
6872 status = decode_read(xdr, rqstp, res);
6873 if (!status)
6874 status = res->count;
6875 out:
6876 return status;
6877 }
6878
6879 /*
6880 * Decode WRITE response
6881 */
6882 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6883 void *data)
6884 {
6885 struct nfs_pgio_res *res = data;
6886 struct compound_hdr hdr;
6887 int status;
6888
6889 status = decode_compound_hdr(xdr, &hdr);
6890 res->op_status = hdr.status;
6891 if (status)
6892 goto out;
6893 status = decode_sequence(xdr, &res->seq_res, rqstp);
6894 if (status)
6895 goto out;
6896 status = decode_putfh(xdr);
6897 if (status)
6898 goto out;
6899 status = decode_write(xdr, res);
6900 if (status)
6901 goto out;
6902 if (res->fattr)
6903 decode_getfattr(xdr, res->fattr, res->server);
6904 if (!status)
6905 status = res->count;
6906 out:
6907 return status;
6908 }
6909
6910 /*
6911 * Decode COMMIT response
6912 */
6913 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6914 void *data)
6915 {
6916 struct nfs_commitres *res = data;
6917 struct compound_hdr hdr;
6918 int status;
6919
6920 status = decode_compound_hdr(xdr, &hdr);
6921 res->op_status = hdr.status;
6922 if (status)
6923 goto out;
6924 status = decode_sequence(xdr, &res->seq_res, rqstp);
6925 if (status)
6926 goto out;
6927 status = decode_putfh(xdr);
6928 if (status)
6929 goto out;
6930 status = decode_commit(xdr, res);
6931 out:
6932 return status;
6933 }
6934
6935 /*
6936 * Decode FSINFO response
6937 */
6938 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6939 void *data)
6940 {
6941 struct nfs4_fsinfo_res *res = data;
6942 struct compound_hdr hdr;
6943 int status;
6944
6945 status = decode_compound_hdr(xdr, &hdr);
6946 if (!status)
6947 status = decode_sequence(xdr, &res->seq_res, req);
6948 if (!status)
6949 status = decode_putfh(xdr);
6950 if (!status)
6951 status = decode_fsinfo(xdr, res->fsinfo);
6952 return status;
6953 }
6954
6955 /*
6956 * Decode PATHCONF response
6957 */
6958 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6959 void *data)
6960 {
6961 struct nfs4_pathconf_res *res = data;
6962 struct compound_hdr hdr;
6963 int status;
6964
6965 status = decode_compound_hdr(xdr, &hdr);
6966 if (!status)
6967 status = decode_sequence(xdr, &res->seq_res, req);
6968 if (!status)
6969 status = decode_putfh(xdr);
6970 if (!status)
6971 status = decode_pathconf(xdr, res->pathconf);
6972 return status;
6973 }
6974
6975 /*
6976 * Decode STATFS response
6977 */
6978 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6979 void *data)
6980 {
6981 struct nfs4_statfs_res *res = data;
6982 struct compound_hdr hdr;
6983 int status;
6984
6985 status = decode_compound_hdr(xdr, &hdr);
6986 if (!status)
6987 status = decode_sequence(xdr, &res->seq_res, req);
6988 if (!status)
6989 status = decode_putfh(xdr);
6990 if (!status)
6991 status = decode_statfs(xdr, res->fsstat);
6992 return status;
6993 }
6994
6995 /*
6996 * Decode GETATTR_BITMAP response
6997 */
6998 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6999 struct xdr_stream *xdr,
7000 void *data)
7001 {
7002 struct nfs4_server_caps_res *res = data;
7003 struct compound_hdr hdr;
7004 int status;
7005
7006 status = decode_compound_hdr(xdr, &hdr);
7007 if (status)
7008 goto out;
7009 status = decode_sequence(xdr, &res->seq_res, req);
7010 if (status)
7011 goto out;
7012 status = decode_putfh(xdr);
7013 if (status)
7014 goto out;
7015 status = decode_server_caps(xdr, res);
7016 out:
7017 return status;
7018 }
7019
7020 /*
7021 * Decode RENEW response
7022 */
7023 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
7024 void *__unused)
7025 {
7026 struct compound_hdr hdr;
7027 int status;
7028
7029 status = decode_compound_hdr(xdr, &hdr);
7030 if (!status)
7031 status = decode_renew(xdr);
7032 return status;
7033 }
7034
7035 /*
7036 * Decode SETCLIENTID response
7037 */
7038 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
7039 struct xdr_stream *xdr,
7040 void *data)
7041 {
7042 struct nfs4_setclientid_res *res = data;
7043 struct compound_hdr hdr;
7044 int status;
7045
7046 status = decode_compound_hdr(xdr, &hdr);
7047 if (!status)
7048 status = decode_setclientid(xdr, res);
7049 return status;
7050 }
7051
7052 /*
7053 * Decode SETCLIENTID_CONFIRM response
7054 */
7055 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
7056 struct xdr_stream *xdr,
7057 void *data)
7058 {
7059 struct compound_hdr hdr;
7060 int status;
7061
7062 status = decode_compound_hdr(xdr, &hdr);
7063 if (!status)
7064 status = decode_setclientid_confirm(xdr);
7065 return status;
7066 }
7067
7068 /*
7069 * Decode DELEGRETURN response
7070 */
7071 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
7072 struct xdr_stream *xdr,
7073 void *data)
7074 {
7075 struct nfs4_delegreturnres *res = data;
7076 struct compound_hdr hdr;
7077 int status;
7078
7079 status = decode_compound_hdr(xdr, &hdr);
7080 if (status)
7081 goto out;
7082 status = decode_sequence(xdr, &res->seq_res, rqstp);
7083 if (status)
7084 goto out;
7085 status = decode_putfh(xdr);
7086 if (status != 0)
7087 goto out;
7088 if (res->lr_res) {
7089 status = decode_layoutreturn(xdr, res->lr_res);
7090 res->lr_ret = status;
7091 if (status)
7092 goto out;
7093 }
7094 if (res->fattr) {
7095 status = decode_getfattr(xdr, res->fattr, res->server);
7096 if (status != 0)
7097 goto out;
7098 }
7099 status = decode_delegreturn(xdr);
7100 out:
7101 return status;
7102 }
7103
7104 /*
7105 * Decode FS_LOCATIONS response
7106 */
7107 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
7108 struct xdr_stream *xdr,
7109 void *data)
7110 {
7111 struct nfs4_fs_locations_res *res = data;
7112 struct compound_hdr hdr;
7113 int status;
7114
7115 status = decode_compound_hdr(xdr, &hdr);
7116 if (status)
7117 goto out;
7118 status = decode_sequence(xdr, &res->seq_res, req);
7119 if (status)
7120 goto out;
7121 status = decode_putfh(xdr);
7122 if (status)
7123 goto out;
7124 if (res->migration) {
7125 xdr_enter_page(xdr, PAGE_SIZE);
7126 status = decode_getfattr_generic(xdr,
7127 &res->fs_locations->fattr,
7128 NULL, res->fs_locations,
7129 NULL, res->fs_locations->server);
7130 if (status)
7131 goto out;
7132 if (res->renew)
7133 status = decode_renew(xdr);
7134 } else {
7135 status = decode_lookup(xdr);
7136 if (status)
7137 goto out;
7138 xdr_enter_page(xdr, PAGE_SIZE);
7139 status = decode_getfattr_generic(xdr,
7140 &res->fs_locations->fattr,
7141 NULL, res->fs_locations,
7142 NULL, res->fs_locations->server);
7143 }
7144 out:
7145 return status;
7146 }
7147
7148 /*
7149 * Decode SECINFO response
7150 */
7151 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7152 struct xdr_stream *xdr,
7153 void *data)
7154 {
7155 struct nfs4_secinfo_res *res = data;
7156 struct compound_hdr hdr;
7157 int status;
7158
7159 status = decode_compound_hdr(xdr, &hdr);
7160 if (status)
7161 goto out;
7162 status = decode_sequence(xdr, &res->seq_res, rqstp);
7163 if (status)
7164 goto out;
7165 status = decode_putfh(xdr);
7166 if (status)
7167 goto out;
7168 status = decode_secinfo(xdr, res);
7169 out:
7170 return status;
7171 }
7172
7173 /*
7174 * Decode FSID_PRESENT response
7175 */
7176 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7177 struct xdr_stream *xdr,
7178 void *data)
7179 {
7180 struct nfs4_fsid_present_res *res = data;
7181 struct compound_hdr hdr;
7182 int status;
7183
7184 status = decode_compound_hdr(xdr, &hdr);
7185 if (status)
7186 goto out;
7187 status = decode_sequence(xdr, &res->seq_res, rqstp);
7188 if (status)
7189 goto out;
7190 status = decode_putfh(xdr);
7191 if (status)
7192 goto out;
7193 status = decode_getfh(xdr, res->fh);
7194 if (status)
7195 goto out;
7196 if (res->renew)
7197 status = decode_renew(xdr);
7198 out:
7199 return status;
7200 }
7201
7202 #if defined(CONFIG_NFS_V4_1)
7203 /*
7204 * Decode BIND_CONN_TO_SESSION response
7205 */
7206 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7207 struct xdr_stream *xdr,
7208 void *res)
7209 {
7210 struct compound_hdr hdr;
7211 int status;
7212
7213 status = decode_compound_hdr(xdr, &hdr);
7214 if (!status)
7215 status = decode_bind_conn_to_session(xdr, res);
7216 return status;
7217 }
7218
7219 /*
7220 * Decode EXCHANGE_ID response
7221 */
7222 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7223 struct xdr_stream *xdr,
7224 void *res)
7225 {
7226 struct compound_hdr hdr;
7227 int status;
7228
7229 status = decode_compound_hdr(xdr, &hdr);
7230 if (!status)
7231 status = decode_exchange_id(xdr, res);
7232 return status;
7233 }
7234
7235 /*
7236 * Decode CREATE_SESSION response
7237 */
7238 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7239 struct xdr_stream *xdr,
7240 void *res)
7241 {
7242 struct compound_hdr hdr;
7243 int status;
7244
7245 status = decode_compound_hdr(xdr, &hdr);
7246 if (!status)
7247 status = decode_create_session(xdr, res);
7248 return status;
7249 }
7250
7251 /*
7252 * Decode DESTROY_SESSION response
7253 */
7254 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7255 struct xdr_stream *xdr,
7256 void *res)
7257 {
7258 struct compound_hdr hdr;
7259 int status;
7260
7261 status = decode_compound_hdr(xdr, &hdr);
7262 if (!status)
7263 status = decode_destroy_session(xdr, res);
7264 return status;
7265 }
7266
7267 /*
7268 * Decode DESTROY_CLIENTID response
7269 */
7270 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7271 struct xdr_stream *xdr,
7272 void *res)
7273 {
7274 struct compound_hdr hdr;
7275 int status;
7276
7277 status = decode_compound_hdr(xdr, &hdr);
7278 if (!status)
7279 status = decode_destroy_clientid(xdr, res);
7280 return status;
7281 }
7282
7283 /*
7284 * Decode SEQUENCE response
7285 */
7286 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7287 struct xdr_stream *xdr,
7288 void *res)
7289 {
7290 struct compound_hdr hdr;
7291 int status;
7292
7293 status = decode_compound_hdr(xdr, &hdr);
7294 if (!status)
7295 status = decode_sequence(xdr, res, rqstp);
7296 return status;
7297 }
7298
7299 /*
7300 * Decode GET_LEASE_TIME response
7301 */
7302 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7303 struct xdr_stream *xdr,
7304 void *data)
7305 {
7306 struct nfs4_get_lease_time_res *res = data;
7307 struct compound_hdr hdr;
7308 int status;
7309
7310 status = decode_compound_hdr(xdr, &hdr);
7311 if (!status)
7312 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7313 if (!status)
7314 status = decode_putrootfh(xdr);
7315 if (!status)
7316 status = decode_fsinfo(xdr, res->lr_fsinfo);
7317 return status;
7318 }
7319
7320 /*
7321 * Decode RECLAIM_COMPLETE response
7322 */
7323 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7324 struct xdr_stream *xdr,
7325 void *data)
7326 {
7327 struct nfs41_reclaim_complete_res *res = data;
7328 struct compound_hdr hdr;
7329 int status;
7330
7331 status = decode_compound_hdr(xdr, &hdr);
7332 if (!status)
7333 status = decode_sequence(xdr, &res->seq_res, rqstp);
7334 if (!status)
7335 status = decode_reclaim_complete(xdr, NULL);
7336 return status;
7337 }
7338
7339 /*
7340 * Decode GETDEVINFO response
7341 */
7342 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7343 struct xdr_stream *xdr,
7344 void *data)
7345 {
7346 struct nfs4_getdeviceinfo_res *res = data;
7347 struct compound_hdr hdr;
7348 int status;
7349
7350 status = decode_compound_hdr(xdr, &hdr);
7351 if (status != 0)
7352 goto out;
7353 status = decode_sequence(xdr, &res->seq_res, rqstp);
7354 if (status != 0)
7355 goto out;
7356 status = decode_getdeviceinfo(xdr, res);
7357 out:
7358 return status;
7359 }
7360
7361 /*
7362 * Decode LAYOUTGET response
7363 */
7364 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7365 struct xdr_stream *xdr,
7366 void *data)
7367 {
7368 struct nfs4_layoutget_res *res = data;
7369 struct compound_hdr hdr;
7370 int status;
7371
7372 status = decode_compound_hdr(xdr, &hdr);
7373 if (status)
7374 goto out;
7375 status = decode_sequence(xdr, &res->seq_res, rqstp);
7376 if (status)
7377 goto out;
7378 status = decode_putfh(xdr);
7379 if (status)
7380 goto out;
7381 status = decode_layoutget(xdr, rqstp, res);
7382 out:
7383 return status;
7384 }
7385
7386 /*
7387 * Decode LAYOUTRETURN response
7388 */
7389 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7390 struct xdr_stream *xdr,
7391 void *data)
7392 {
7393 struct nfs4_layoutreturn_res *res = data;
7394 struct compound_hdr hdr;
7395 int status;
7396
7397 status = decode_compound_hdr(xdr, &hdr);
7398 if (status)
7399 goto out;
7400 status = decode_sequence(xdr, &res->seq_res, rqstp);
7401 if (status)
7402 goto out;
7403 status = decode_putfh(xdr);
7404 if (status)
7405 goto out;
7406 status = decode_layoutreturn(xdr, res);
7407 out:
7408 return status;
7409 }
7410
7411 /*
7412 * Decode LAYOUTCOMMIT response
7413 */
7414 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7415 struct xdr_stream *xdr,
7416 void *data)
7417 {
7418 struct nfs4_layoutcommit_res *res = data;
7419 struct compound_hdr hdr;
7420 int status;
7421
7422 status = decode_compound_hdr(xdr, &hdr);
7423 if (status)
7424 goto out;
7425 status = decode_sequence(xdr, &res->seq_res, rqstp);
7426 if (status)
7427 goto out;
7428 status = decode_putfh(xdr);
7429 if (status)
7430 goto out;
7431 status = decode_layoutcommit(xdr, rqstp, res);
7432 if (status)
7433 goto out;
7434 decode_getfattr(xdr, res->fattr, res->server);
7435 out:
7436 return status;
7437 }
7438
7439 /*
7440 * Decode SECINFO_NO_NAME response
7441 */
7442 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7443 struct xdr_stream *xdr,
7444 void *data)
7445 {
7446 struct nfs4_secinfo_res *res = data;
7447 struct compound_hdr hdr;
7448 int status;
7449
7450 status = decode_compound_hdr(xdr, &hdr);
7451 if (status)
7452 goto out;
7453 status = decode_sequence(xdr, &res->seq_res, rqstp);
7454 if (status)
7455 goto out;
7456 status = decode_putrootfh(xdr);
7457 if (status)
7458 goto out;
7459 status = decode_secinfo_no_name(xdr, res);
7460 out:
7461 return status;
7462 }
7463
7464 /*
7465 * Decode TEST_STATEID response
7466 */
7467 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7468 struct xdr_stream *xdr,
7469 void *data)
7470 {
7471 struct nfs41_test_stateid_res *res = data;
7472 struct compound_hdr hdr;
7473 int status;
7474
7475 status = decode_compound_hdr(xdr, &hdr);
7476 if (status)
7477 goto out;
7478 status = decode_sequence(xdr, &res->seq_res, rqstp);
7479 if (status)
7480 goto out;
7481 status = decode_test_stateid(xdr, res);
7482 out:
7483 return status;
7484 }
7485
7486 /*
7487 * Decode FREE_STATEID response
7488 */
7489 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7490 struct xdr_stream *xdr,
7491 void *data)
7492 {
7493 struct nfs41_free_stateid_res *res = data;
7494 struct compound_hdr hdr;
7495 int status;
7496
7497 status = decode_compound_hdr(xdr, &hdr);
7498 if (status)
7499 goto out;
7500 status = decode_sequence(xdr, &res->seq_res, rqstp);
7501 if (status)
7502 goto out;
7503 status = decode_free_stateid(xdr, res);
7504 out:
7505 return status;
7506 }
7507 #endif /* CONFIG_NFS_V4_1 */
7508
7509 /**
7510 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7511 * the local page cache.
7512 * @xdr: XDR stream where entry resides
7513 * @entry: buffer to fill in with entry data
7514 * @plus: boolean indicating whether this should be a readdirplus entry
7515 *
7516 * Returns zero if successful, otherwise a negative errno value is
7517 * returned.
7518 *
7519 * This function is not invoked during READDIR reply decoding, but
7520 * rather whenever an application invokes the getdents(2) system call
7521 * on a directory already in our cache.
7522 */
7523 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7524 bool plus)
7525 {
7526 unsigned int savep;
7527 uint32_t bitmap[3] = {0};
7528 uint32_t len;
7529 __be32 *p = xdr_inline_decode(xdr, 4);
7530 if (unlikely(!p))
7531 goto out_overflow;
7532 if (*p == xdr_zero) {
7533 p = xdr_inline_decode(xdr, 4);
7534 if (unlikely(!p))
7535 goto out_overflow;
7536 if (*p == xdr_zero)
7537 return -EAGAIN;
7538 entry->eof = 1;
7539 return -EBADCOOKIE;
7540 }
7541
7542 p = xdr_inline_decode(xdr, 12);
7543 if (unlikely(!p))
7544 goto out_overflow;
7545 entry->prev_cookie = entry->cookie;
7546 p = xdr_decode_hyper(p, &entry->cookie);
7547 entry->len = be32_to_cpup(p);
7548
7549 p = xdr_inline_decode(xdr, entry->len);
7550 if (unlikely(!p))
7551 goto out_overflow;
7552 entry->name = (const char *) p;
7553
7554 /*
7555 * In case the server doesn't return an inode number,
7556 * we fake one here. (We don't use inode number 0,
7557 * since glibc seems to choke on it...)
7558 */
7559 entry->ino = 1;
7560 entry->fattr->valid = 0;
7561
7562 if (decode_attr_bitmap(xdr, bitmap) < 0)
7563 goto out_overflow;
7564
7565 if (decode_attr_length(xdr, &len, &savep) < 0)
7566 goto out_overflow;
7567
7568 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7569 NULL, entry->label, entry->server) < 0)
7570 goto out_overflow;
7571 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7572 entry->ino = entry->fattr->mounted_on_fileid;
7573 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7574 entry->ino = entry->fattr->fileid;
7575
7576 entry->d_type = DT_UNKNOWN;
7577 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7578 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7579
7580 return 0;
7581
7582 out_overflow:
7583 print_overflow_msg(__func__, xdr);
7584 return -EAGAIN;
7585 }
7586
7587 /*
7588 * We need to translate between nfs status return values and
7589 * the local errno values which may not be the same.
7590 */
7591 static struct {
7592 int stat;
7593 int errno;
7594 } nfs_errtbl[] = {
7595 { NFS4_OK, 0 },
7596 { NFS4ERR_PERM, -EPERM },
7597 { NFS4ERR_NOENT, -ENOENT },
7598 { NFS4ERR_IO, -errno_NFSERR_IO},
7599 { NFS4ERR_NXIO, -ENXIO },
7600 { NFS4ERR_ACCESS, -EACCES },
7601 { NFS4ERR_EXIST, -EEXIST },
7602 { NFS4ERR_XDEV, -EXDEV },
7603 { NFS4ERR_NOTDIR, -ENOTDIR },
7604 { NFS4ERR_ISDIR, -EISDIR },
7605 { NFS4ERR_INVAL, -EINVAL },
7606 { NFS4ERR_FBIG, -EFBIG },
7607 { NFS4ERR_NOSPC, -ENOSPC },
7608 { NFS4ERR_ROFS, -EROFS },
7609 { NFS4ERR_MLINK, -EMLINK },
7610 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7611 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7612 { NFS4ERR_DQUOT, -EDQUOT },
7613 { NFS4ERR_STALE, -ESTALE },
7614 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7615 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7616 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7617 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7618 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7619 { NFS4ERR_BADTYPE, -EBADTYPE },
7620 { NFS4ERR_LOCKED, -EAGAIN },
7621 { NFS4ERR_SYMLINK, -ELOOP },
7622 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7623 { NFS4ERR_DEADLOCK, -EDEADLK },
7624 { -1, -EIO }
7625 };
7626
7627 /*
7628 * Convert an NFS error code to a local one.
7629 * This one is used jointly by NFSv2 and NFSv3.
7630 */
7631 static int
7632 nfs4_stat_to_errno(int stat)
7633 {
7634 int i;
7635 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7636 if (nfs_errtbl[i].stat == stat)
7637 return nfs_errtbl[i].errno;
7638 }
7639 if (stat <= 10000 || stat > 10100) {
7640 /* The server is looney tunes. */
7641 return -EREMOTEIO;
7642 }
7643 /* If we cannot translate the error, the recovery routines should
7644 * handle it.
7645 * Note: remaining NFSv4 error codes have values > 10000, so should
7646 * not conflict with native Linux error codes.
7647 */
7648 return -stat;
7649 }
7650
7651 #ifdef CONFIG_NFS_V4_2
7652 #include "nfs42xdr.c"
7653 #endif /* CONFIG_NFS_V4_2 */
7654
7655 #define PROC(proc, argtype, restype) \
7656 [NFSPROC4_CLNT_##proc] = { \
7657 .p_proc = NFSPROC4_COMPOUND, \
7658 .p_encode = nfs4_xdr_##argtype, \
7659 .p_decode = nfs4_xdr_##restype, \
7660 .p_arglen = NFS4_##argtype##_sz, \
7661 .p_replen = NFS4_##restype##_sz, \
7662 .p_statidx = NFSPROC4_CLNT_##proc, \
7663 .p_name = #proc, \
7664 }
7665
7666 #define STUB(proc) \
7667 [NFSPROC4_CLNT_##proc] = { \
7668 .p_name = #proc, \
7669 }
7670
7671 const struct rpc_procinfo nfs4_procedures[] = {
7672 PROC(READ, enc_read, dec_read),
7673 PROC(WRITE, enc_write, dec_write),
7674 PROC(COMMIT, enc_commit, dec_commit),
7675 PROC(OPEN, enc_open, dec_open),
7676 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7677 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7678 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7679 PROC(CLOSE, enc_close, dec_close),
7680 PROC(SETATTR, enc_setattr, dec_setattr),
7681 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7682 PROC(RENEW, enc_renew, dec_renew),
7683 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7684 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7685 PROC(LOCK, enc_lock, dec_lock),
7686 PROC(LOCKT, enc_lockt, dec_lockt),
7687 PROC(LOCKU, enc_locku, dec_locku),
7688 PROC(ACCESS, enc_access, dec_access),
7689 PROC(GETATTR, enc_getattr, dec_getattr),
7690 PROC(LOOKUP, enc_lookup, dec_lookup),
7691 PROC(LOOKUPP, enc_lookupp, dec_lookupp),
7692 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7693 PROC(REMOVE, enc_remove, dec_remove),
7694 PROC(RENAME, enc_rename, dec_rename),
7695 PROC(LINK, enc_link, dec_link),
7696 PROC(SYMLINK, enc_symlink, dec_symlink),
7697 PROC(CREATE, enc_create, dec_create),
7698 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7699 PROC(STATFS, enc_statfs, dec_statfs),
7700 PROC(READLINK, enc_readlink, dec_readlink),
7701 PROC(READDIR, enc_readdir, dec_readdir),
7702 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7703 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7704 PROC(GETACL, enc_getacl, dec_getacl),
7705 PROC(SETACL, enc_setacl, dec_setacl),
7706 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7707 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7708 PROC(SECINFO, enc_secinfo, dec_secinfo),
7709 PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present),
7710 #if defined(CONFIG_NFS_V4_1)
7711 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7712 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
7713 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7714 PROC(SEQUENCE, enc_sequence, dec_sequence),
7715 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7716 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
7717 PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7718 PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
7719 PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7720 PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7721 PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7722 PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7723 PROC(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7724 STUB(GETDEVICELIST),
7725 PROC(BIND_CONN_TO_SESSION,
7726 enc_bind_conn_to_session, dec_bind_conn_to_session),
7727 PROC(DESTROY_CLIENTID, enc_destroy_clientid, dec_destroy_clientid),
7728 #endif /* CONFIG_NFS_V4_1 */
7729 #ifdef CONFIG_NFS_V4_2
7730 PROC(SEEK, enc_seek, dec_seek),
7731 PROC(ALLOCATE, enc_allocate, dec_allocate),
7732 PROC(DEALLOCATE, enc_deallocate, dec_deallocate),
7733 PROC(LAYOUTSTATS, enc_layoutstats, dec_layoutstats),
7734 PROC(CLONE, enc_clone, dec_clone),
7735 PROC(COPY, enc_copy, dec_copy),
7736 #endif /* CONFIG_NFS_V4_2 */
7737 };
7738
7739 static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7740 const struct rpc_version nfs_version4 = {
7741 .number = 4,
7742 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7743 .procs = nfs4_procedures,
7744 .counts = nfs_version4_counts,
7745 };
7746
7747 /*
7748 * Local variables:
7749 * c-basic-offset: 8
7750 * End:
7751 */
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