1 /*
2 * fs/nfs/nfs4xdr.c
3 *
4 * Client-side XDR for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <linux/param.h>
39 #include <linux/time.h>
40 #include <linux/mm.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/in.h>
44 #include <linux/pagemap.h>
45 #include <linux/proc_fs.h>
46 #include <linux/kdev_t.h>
47 #include <linux/module.h>
48 #include <linux/utsname.h>
49 #include <linux/sunrpc/clnt.h>
50 #include <linux/sunrpc/msg_prot.h>
51 #include <linux/sunrpc/gss_api.h>
52 #include <linux/nfs.h>
53 #include <linux/nfs4.h>
54 #include <linux/nfs_fs.h>
55 #include <linux/nfs_idmap.h>
56
57 #include "nfs4_fs.h"
58 #include "internal.h"
59 #include "nfs4session.h"
60 #include "pnfs.h"
61 #include "netns.h"
62
63 #define NFSDBG_FACILITY NFSDBG_XDR
64
65 /* Mapping from NFS error code to "errno" error code. */
66 #define errno_NFSERR_IO EIO
67
68 static int nfs4_stat_to_errno(int);
69
70 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
71 #ifdef DEBUG
72 #define NFS4_MAXTAGLEN 20
73 #else
74 #define NFS4_MAXTAGLEN 0
75 #endif
76
77 /* lock,open owner id:
78 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
79 */
80 #define open_owner_id_maxsz (1 + 2 + 1 + 1 + 2)
81 #define lock_owner_id_maxsz (1 + 1 + 4)
82 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
83 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
84 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
85 #define op_encode_hdr_maxsz (1)
86 #define op_decode_hdr_maxsz (2)
87 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
88 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
89 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
90 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
91 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
92 (NFS4_FHSIZE >> 2))
93 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
94 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
95 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
96 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
97 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
98 ((3+NFS4_FHSIZE) >> 2))
99 #define nfs4_fattr_bitmap_maxsz 4
100 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
101 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
102 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
103 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
104 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
105 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
106 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
107 #define nfs4_label_maxsz (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
108 #else
109 #define nfs4_label_maxsz 0
110 #endif
111 /* We support only one layout type per file system */
112 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
113 /* This is based on getfattr, which uses the most attributes: */
114 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
115 3 + 3 + 3 + nfs4_owner_maxsz + \
116 nfs4_group_maxsz + nfs4_label_maxsz + \
117 decode_mdsthreshold_maxsz))
118 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
119 nfs4_fattr_value_maxsz)
120 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
121 #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
122 1 + 2 + 1 + \
123 nfs4_owner_maxsz + \
124 nfs4_group_maxsz + \
125 nfs4_label_maxsz + \
126 4 + 4)
127 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
128 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
129 #define encode_restorefh_maxsz (op_encode_hdr_maxsz)
130 #define decode_restorefh_maxsz (op_decode_hdr_maxsz)
131 #define encode_fsinfo_maxsz (encode_getattr_maxsz)
132 /* The 5 accounts for the PNFS attributes, and assumes that at most three
133 * layout types will be returned.
134 */
135 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + \
136 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
137 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
138 #define decode_renew_maxsz (op_decode_hdr_maxsz)
139 #define encode_setclientid_maxsz \
140 (op_encode_hdr_maxsz + \
141 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
142 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
143 1 /* sc_prog */ + \
144 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
145 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
146 1) /* sc_cb_ident */
147 #define decode_setclientid_maxsz \
148 (op_decode_hdr_maxsz + \
149 2 + \
150 1024) /* large value for CLID_INUSE */
151 #define encode_setclientid_confirm_maxsz \
152 (op_encode_hdr_maxsz + \
153 3 + (NFS4_VERIFIER_SIZE >> 2))
154 #define decode_setclientid_confirm_maxsz \
155 (op_decode_hdr_maxsz)
156 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
157 #define decode_lookup_maxsz (op_decode_hdr_maxsz)
158 #define encode_share_access_maxsz \
159 (2)
160 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
161 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
162 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
163 #define encode_open_maxsz (op_encode_hdr_maxsz + \
164 2 + encode_share_access_maxsz + 2 + \
165 open_owner_id_maxsz + \
166 encode_opentype_maxsz + \
167 encode_claim_null_maxsz)
168 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
169 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
170 decode_ace_maxsz)
171 #define decode_change_info_maxsz (5)
172 #define decode_open_maxsz (op_decode_hdr_maxsz + \
173 decode_stateid_maxsz + \
174 decode_change_info_maxsz + 1 + \
175 nfs4_fattr_bitmap_maxsz + \
176 decode_delegation_maxsz)
177 #define encode_open_confirm_maxsz \
178 (op_encode_hdr_maxsz + \
179 encode_stateid_maxsz + 1)
180 #define decode_open_confirm_maxsz \
181 (op_decode_hdr_maxsz + \
182 decode_stateid_maxsz)
183 #define encode_open_downgrade_maxsz \
184 (op_encode_hdr_maxsz + \
185 encode_stateid_maxsz + 1 + \
186 encode_share_access_maxsz)
187 #define decode_open_downgrade_maxsz \
188 (op_decode_hdr_maxsz + \
189 decode_stateid_maxsz)
190 #define encode_close_maxsz (op_encode_hdr_maxsz + \
191 1 + encode_stateid_maxsz)
192 #define decode_close_maxsz (op_decode_hdr_maxsz + \
193 decode_stateid_maxsz)
194 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
195 encode_stateid_maxsz + \
196 encode_attrs_maxsz)
197 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
198 nfs4_fattr_bitmap_maxsz)
199 #define encode_read_maxsz (op_encode_hdr_maxsz + \
200 encode_stateid_maxsz + 3)
201 #define decode_read_maxsz (op_decode_hdr_maxsz + 2)
202 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
203 2 + encode_verifier_maxsz + 5 + \
204 nfs4_label_maxsz)
205 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
206 decode_verifier_maxsz)
207 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
208 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
209 #define encode_write_maxsz (op_encode_hdr_maxsz + \
210 encode_stateid_maxsz + 4)
211 #define decode_write_maxsz (op_decode_hdr_maxsz + \
212 2 + decode_verifier_maxsz)
213 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
214 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
215 decode_verifier_maxsz)
216 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
217 nfs4_name_maxsz)
218 #define decode_remove_maxsz (op_decode_hdr_maxsz + \
219 decode_change_info_maxsz)
220 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
221 2 * nfs4_name_maxsz)
222 #define decode_rename_maxsz (op_decode_hdr_maxsz + \
223 decode_change_info_maxsz + \
224 decode_change_info_maxsz)
225 #define encode_link_maxsz (op_encode_hdr_maxsz + \
226 nfs4_name_maxsz)
227 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
228 #define encode_lockowner_maxsz (7)
229 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
230 7 + \
231 1 + encode_stateid_maxsz + 1 + \
232 encode_lockowner_maxsz)
233 #define decode_lock_denied_maxsz \
234 (8 + decode_lockowner_maxsz)
235 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
236 decode_lock_denied_maxsz)
237 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
238 encode_lockowner_maxsz)
239 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
240 decode_lock_denied_maxsz)
241 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
242 encode_stateid_maxsz + \
243 4)
244 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
245 decode_stateid_maxsz)
246 #define encode_release_lockowner_maxsz \
247 (op_encode_hdr_maxsz + \
248 encode_lockowner_maxsz)
249 #define decode_release_lockowner_maxsz \
250 (op_decode_hdr_maxsz)
251 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
252 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
253 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
254 1 + nfs4_name_maxsz + \
255 1 + \
256 nfs4_fattr_maxsz)
257 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
258 #define encode_create_maxsz (op_encode_hdr_maxsz + \
259 1 + 2 + nfs4_name_maxsz + \
260 encode_attrs_maxsz)
261 #define decode_create_maxsz (op_decode_hdr_maxsz + \
262 decode_change_info_maxsz + \
263 nfs4_fattr_bitmap_maxsz)
264 #define encode_statfs_maxsz (encode_getattr_maxsz)
265 #define decode_statfs_maxsz (decode_getattr_maxsz)
266 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
267 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
268 #define encode_getacl_maxsz (encode_getattr_maxsz)
269 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
270 nfs4_fattr_bitmap_maxsz + 1)
271 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
272 encode_stateid_maxsz + 3)
273 #define decode_setacl_maxsz (decode_setattr_maxsz)
274 #define encode_fs_locations_maxsz \
275 (encode_getattr_maxsz)
276 #define decode_fs_locations_maxsz \
277 (0)
278 #define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
279 #define decode_secinfo_maxsz (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
280
281 #if defined(CONFIG_NFS_V4_1)
282 #define NFS4_MAX_MACHINE_NAME_LEN (64)
283 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
284 sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
285
286 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
287 encode_verifier_maxsz + \
288 1 /* co_ownerid.len */ + \
289 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
290 1 /* flags */ + \
291 1 /* spa_how */ + \
292 /* max is SP4_MACH_CRED (for now) */ + \
293 1 + NFS4_OP_MAP_NUM_WORDS + \
294 1 + NFS4_OP_MAP_NUM_WORDS + \
295 1 /* implementation id array of size 1 */ + \
296 1 /* nii_domain */ + \
297 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
298 1 /* nii_name */ + \
299 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
300 3 /* nii_date */)
301 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
302 2 /* eir_clientid */ + \
303 1 /* eir_sequenceid */ + \
304 1 /* eir_flags */ + \
305 1 /* spr_how */ + \
306 /* max is SP4_MACH_CRED (for now) */ + \
307 1 + NFS4_OP_MAP_NUM_WORDS + \
308 1 + NFS4_OP_MAP_NUM_WORDS + \
309 2 /* eir_server_owner.so_minor_id */ + \
310 /* eir_server_owner.so_major_id<> */ \
311 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
312 /* eir_server_scope<> */ \
313 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
314 1 /* eir_server_impl_id array length */ + \
315 1 /* nii_domain */ + \
316 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
317 1 /* nii_name */ + \
318 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
319 3 /* nii_date */)
320 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
321 #define decode_channel_attrs_maxsz (6 + \
322 1 /* ca_rdma_ird.len */ + \
323 1 /* ca_rdma_ird */)
324 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \
325 2 /* csa_clientid */ + \
326 1 /* csa_sequence */ + \
327 1 /* csa_flags */ + \
328 encode_channel_attrs_maxsz + \
329 encode_channel_attrs_maxsz + \
330 1 /* csa_cb_program */ + \
331 1 /* csa_sec_parms.len (1) */ + \
332 1 /* cb_secflavor (AUTH_SYS) */ + \
333 1 /* stamp */ + \
334 1 /* machinename.len */ + \
335 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
336 1 /* uid */ + \
337 1 /* gid */ + \
338 1 /* gids.len (0) */)
339 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \
340 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
341 1 /* csr_sequence */ + \
342 1 /* csr_flags */ + \
343 decode_channel_attrs_maxsz + \
344 decode_channel_attrs_maxsz)
345 #define encode_bind_conn_to_session_maxsz (op_encode_hdr_maxsz + \
346 /* bctsa_sessid */ \
347 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
348 1 /* bctsa_dir */ + \
349 1 /* bctsa_use_conn_in_rdma_mode */)
350 #define decode_bind_conn_to_session_maxsz (op_decode_hdr_maxsz + \
351 /* bctsr_sessid */ \
352 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
353 1 /* bctsr_dir */ + \
354 1 /* bctsr_use_conn_in_rdma_mode */)
355 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
356 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
357 #define encode_destroy_clientid_maxsz (op_encode_hdr_maxsz + 2)
358 #define decode_destroy_clientid_maxsz (op_decode_hdr_maxsz)
359 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \
360 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
361 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \
362 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
363 #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
364 #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
365 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
366 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
367 1 /* layout type */ + \
368 1 /* maxcount */ + \
369 1 /* bitmap size */ + \
370 1 /* notification bitmap length */ + \
371 1 /* notification bitmap, word 0 */)
372 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
373 1 /* layout type */ + \
374 1 /* opaque devaddr4 length */ + \
375 /* devaddr4 payload is read into page */ \
376 1 /* notification bitmap length */ + \
377 1 /* notification bitmap, word 0 */)
378 #define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
379 encode_stateid_maxsz)
380 #define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
381 decode_stateid_maxsz + \
382 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
383 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
384 2 /* offset */ + \
385 2 /* length */ + \
386 1 /* reclaim */ + \
387 encode_stateid_maxsz + \
388 1 /* new offset (true) */ + \
389 2 /* last byte written */ + \
390 1 /* nt_timechanged (false) */ + \
391 1 /* layoutupdate4 layout type */ + \
392 1 /* layoutupdate4 opaqueue len */)
393 /* the actual content of layoutupdate4 should
394 be allocated by drivers and spliced in
395 using xdr_write_pages */
396 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
397 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
398 encode_stateid_maxsz + \
399 1 /* FIXME: opaque lrf_body always empty at the moment */)
400 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
401 1 + decode_stateid_maxsz)
402 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
403 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
404 #define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \
405 XDR_QUADLEN(NFS4_STATEID_SIZE))
406 #define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1)
407 #define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \
408 XDR_QUADLEN(NFS4_STATEID_SIZE))
409 #define decode_free_stateid_maxsz (op_decode_hdr_maxsz)
410 #else /* CONFIG_NFS_V4_1 */
411 #define encode_sequence_maxsz 0
412 #define decode_sequence_maxsz 0
413 #endif /* CONFIG_NFS_V4_1 */
414
415 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
416 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
417 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
418 encode_sequence_maxsz + \
419 encode_putfh_maxsz + \
420 encode_read_maxsz)
421 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
422 decode_sequence_maxsz + \
423 decode_putfh_maxsz + \
424 decode_read_maxsz)
425 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
426 encode_sequence_maxsz + \
427 encode_putfh_maxsz + \
428 encode_readlink_maxsz)
429 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
430 decode_sequence_maxsz + \
431 decode_putfh_maxsz + \
432 decode_readlink_maxsz)
433 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
434 encode_sequence_maxsz + \
435 encode_putfh_maxsz + \
436 encode_readdir_maxsz)
437 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
438 decode_sequence_maxsz + \
439 decode_putfh_maxsz + \
440 decode_readdir_maxsz)
441 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
442 encode_sequence_maxsz + \
443 encode_putfh_maxsz + \
444 encode_write_maxsz + \
445 encode_getattr_maxsz)
446 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
447 decode_sequence_maxsz + \
448 decode_putfh_maxsz + \
449 decode_write_maxsz + \
450 decode_getattr_maxsz)
451 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
452 encode_sequence_maxsz + \
453 encode_putfh_maxsz + \
454 encode_commit_maxsz)
455 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
456 decode_sequence_maxsz + \
457 decode_putfh_maxsz + \
458 decode_commit_maxsz)
459 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
460 encode_sequence_maxsz + \
461 encode_putfh_maxsz + \
462 encode_open_maxsz + \
463 encode_access_maxsz + \
464 encode_getfh_maxsz + \
465 encode_getattr_maxsz)
466 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
467 decode_sequence_maxsz + \
468 decode_putfh_maxsz + \
469 decode_open_maxsz + \
470 decode_access_maxsz + \
471 decode_getfh_maxsz + \
472 decode_getattr_maxsz)
473 #define NFS4_enc_open_confirm_sz \
474 (compound_encode_hdr_maxsz + \
475 encode_putfh_maxsz + \
476 encode_open_confirm_maxsz)
477 #define NFS4_dec_open_confirm_sz \
478 (compound_decode_hdr_maxsz + \
479 decode_putfh_maxsz + \
480 decode_open_confirm_maxsz)
481 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
482 encode_sequence_maxsz + \
483 encode_putfh_maxsz + \
484 encode_open_maxsz + \
485 encode_access_maxsz + \
486 encode_getattr_maxsz)
487 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
488 decode_sequence_maxsz + \
489 decode_putfh_maxsz + \
490 decode_open_maxsz + \
491 decode_access_maxsz + \
492 decode_getattr_maxsz)
493 #define NFS4_enc_open_downgrade_sz \
494 (compound_encode_hdr_maxsz + \
495 encode_sequence_maxsz + \
496 encode_putfh_maxsz + \
497 encode_open_downgrade_maxsz + \
498 encode_getattr_maxsz)
499 #define NFS4_dec_open_downgrade_sz \
500 (compound_decode_hdr_maxsz + \
501 decode_sequence_maxsz + \
502 decode_putfh_maxsz + \
503 decode_open_downgrade_maxsz + \
504 decode_getattr_maxsz)
505 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
506 encode_sequence_maxsz + \
507 encode_putfh_maxsz + \
508 encode_close_maxsz + \
509 encode_getattr_maxsz)
510 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
511 decode_sequence_maxsz + \
512 decode_putfh_maxsz + \
513 decode_close_maxsz + \
514 decode_getattr_maxsz)
515 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
516 encode_sequence_maxsz + \
517 encode_putfh_maxsz + \
518 encode_setattr_maxsz + \
519 encode_getattr_maxsz)
520 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
521 decode_sequence_maxsz + \
522 decode_putfh_maxsz + \
523 decode_setattr_maxsz + \
524 decode_getattr_maxsz)
525 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
526 encode_sequence_maxsz + \
527 encode_putfh_maxsz + \
528 encode_fsinfo_maxsz)
529 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
530 decode_sequence_maxsz + \
531 decode_putfh_maxsz + \
532 decode_fsinfo_maxsz)
533 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
534 encode_renew_maxsz)
535 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
536 decode_renew_maxsz)
537 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
538 encode_setclientid_maxsz)
539 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
540 decode_setclientid_maxsz)
541 #define NFS4_enc_setclientid_confirm_sz \
542 (compound_encode_hdr_maxsz + \
543 encode_setclientid_confirm_maxsz)
544 #define NFS4_dec_setclientid_confirm_sz \
545 (compound_decode_hdr_maxsz + \
546 decode_setclientid_confirm_maxsz)
547 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
548 encode_sequence_maxsz + \
549 encode_putfh_maxsz + \
550 encode_lock_maxsz)
551 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
552 decode_sequence_maxsz + \
553 decode_putfh_maxsz + \
554 decode_lock_maxsz)
555 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
556 encode_sequence_maxsz + \
557 encode_putfh_maxsz + \
558 encode_lockt_maxsz)
559 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
560 decode_sequence_maxsz + \
561 decode_putfh_maxsz + \
562 decode_lockt_maxsz)
563 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
564 encode_sequence_maxsz + \
565 encode_putfh_maxsz + \
566 encode_locku_maxsz)
567 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
568 decode_sequence_maxsz + \
569 decode_putfh_maxsz + \
570 decode_locku_maxsz)
571 #define NFS4_enc_release_lockowner_sz \
572 (compound_encode_hdr_maxsz + \
573 encode_lockowner_maxsz)
574 #define NFS4_dec_release_lockowner_sz \
575 (compound_decode_hdr_maxsz + \
576 decode_lockowner_maxsz)
577 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
578 encode_sequence_maxsz + \
579 encode_putfh_maxsz + \
580 encode_access_maxsz + \
581 encode_getattr_maxsz)
582 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
583 decode_sequence_maxsz + \
584 decode_putfh_maxsz + \
585 decode_access_maxsz + \
586 decode_getattr_maxsz)
587 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
588 encode_sequence_maxsz + \
589 encode_putfh_maxsz + \
590 encode_getattr_maxsz + \
591 encode_renew_maxsz)
592 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
593 decode_sequence_maxsz + \
594 decode_putfh_maxsz + \
595 decode_getattr_maxsz + \
596 decode_renew_maxsz)
597 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
598 encode_sequence_maxsz + \
599 encode_putfh_maxsz + \
600 encode_lookup_maxsz + \
601 encode_getattr_maxsz + \
602 encode_getfh_maxsz)
603 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
604 decode_sequence_maxsz + \
605 decode_putfh_maxsz + \
606 decode_lookup_maxsz + \
607 decode_getattr_maxsz + \
608 decode_getfh_maxsz)
609 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
610 encode_sequence_maxsz + \
611 encode_putrootfh_maxsz + \
612 encode_getattr_maxsz + \
613 encode_getfh_maxsz)
614 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
615 decode_sequence_maxsz + \
616 decode_putrootfh_maxsz + \
617 decode_getattr_maxsz + \
618 decode_getfh_maxsz)
619 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
620 encode_sequence_maxsz + \
621 encode_putfh_maxsz + \
622 encode_remove_maxsz)
623 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
624 decode_sequence_maxsz + \
625 decode_putfh_maxsz + \
626 decode_remove_maxsz)
627 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
628 encode_sequence_maxsz + \
629 encode_putfh_maxsz + \
630 encode_savefh_maxsz + \
631 encode_putfh_maxsz + \
632 encode_rename_maxsz)
633 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
634 decode_sequence_maxsz + \
635 decode_putfh_maxsz + \
636 decode_savefh_maxsz + \
637 decode_putfh_maxsz + \
638 decode_rename_maxsz)
639 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
640 encode_sequence_maxsz + \
641 encode_putfh_maxsz + \
642 encode_savefh_maxsz + \
643 encode_putfh_maxsz + \
644 encode_link_maxsz + \
645 encode_restorefh_maxsz + \
646 encode_getattr_maxsz)
647 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
648 decode_sequence_maxsz + \
649 decode_putfh_maxsz + \
650 decode_savefh_maxsz + \
651 decode_putfh_maxsz + \
652 decode_link_maxsz + \
653 decode_restorefh_maxsz + \
654 decode_getattr_maxsz)
655 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
656 encode_sequence_maxsz + \
657 encode_putfh_maxsz + \
658 encode_symlink_maxsz + \
659 encode_getattr_maxsz + \
660 encode_getfh_maxsz)
661 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
662 decode_sequence_maxsz + \
663 decode_putfh_maxsz + \
664 decode_symlink_maxsz + \
665 decode_getattr_maxsz + \
666 decode_getfh_maxsz)
667 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
668 encode_sequence_maxsz + \
669 encode_putfh_maxsz + \
670 encode_create_maxsz + \
671 encode_getfh_maxsz + \
672 encode_getattr_maxsz)
673 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
674 decode_sequence_maxsz + \
675 decode_putfh_maxsz + \
676 decode_create_maxsz + \
677 decode_getfh_maxsz + \
678 decode_getattr_maxsz)
679 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
680 encode_sequence_maxsz + \
681 encode_putfh_maxsz + \
682 encode_getattr_maxsz)
683 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
684 decode_sequence_maxsz + \
685 decode_putfh_maxsz + \
686 decode_getattr_maxsz)
687 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
688 encode_sequence_maxsz + \
689 encode_putfh_maxsz + \
690 encode_statfs_maxsz)
691 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
692 decode_sequence_maxsz + \
693 decode_putfh_maxsz + \
694 decode_statfs_maxsz)
695 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
696 encode_sequence_maxsz + \
697 encode_putfh_maxsz + \
698 encode_getattr_maxsz)
699 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
700 decode_sequence_maxsz + \
701 decode_putfh_maxsz + \
702 decode_getattr_maxsz)
703 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
704 encode_sequence_maxsz + \
705 encode_putfh_maxsz + \
706 encode_delegreturn_maxsz + \
707 encode_getattr_maxsz)
708 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
709 decode_sequence_maxsz + \
710 decode_delegreturn_maxsz + \
711 decode_getattr_maxsz)
712 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
713 encode_sequence_maxsz + \
714 encode_putfh_maxsz + \
715 encode_getacl_maxsz)
716 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
717 decode_sequence_maxsz + \
718 decode_putfh_maxsz + \
719 decode_getacl_maxsz)
720 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
721 encode_sequence_maxsz + \
722 encode_putfh_maxsz + \
723 encode_setacl_maxsz)
724 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
725 decode_sequence_maxsz + \
726 decode_putfh_maxsz + \
727 decode_setacl_maxsz)
728 #define NFS4_enc_fs_locations_sz \
729 (compound_encode_hdr_maxsz + \
730 encode_sequence_maxsz + \
731 encode_putfh_maxsz + \
732 encode_lookup_maxsz + \
733 encode_fs_locations_maxsz + \
734 encode_renew_maxsz)
735 #define NFS4_dec_fs_locations_sz \
736 (compound_decode_hdr_maxsz + \
737 decode_sequence_maxsz + \
738 decode_putfh_maxsz + \
739 decode_lookup_maxsz + \
740 decode_fs_locations_maxsz + \
741 decode_renew_maxsz)
742 #define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
743 encode_sequence_maxsz + \
744 encode_putfh_maxsz + \
745 encode_secinfo_maxsz)
746 #define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
747 decode_sequence_maxsz + \
748 decode_putfh_maxsz + \
749 decode_secinfo_maxsz)
750 #define NFS4_enc_fsid_present_sz \
751 (compound_encode_hdr_maxsz + \
752 encode_sequence_maxsz + \
753 encode_putfh_maxsz + \
754 encode_getfh_maxsz + \
755 encode_renew_maxsz)
756 #define NFS4_dec_fsid_present_sz \
757 (compound_decode_hdr_maxsz + \
758 decode_sequence_maxsz + \
759 decode_putfh_maxsz + \
760 decode_getfh_maxsz + \
761 decode_renew_maxsz)
762 #if defined(CONFIG_NFS_V4_1)
763 #define NFS4_enc_bind_conn_to_session_sz \
764 (compound_encode_hdr_maxsz + \
765 encode_bind_conn_to_session_maxsz)
766 #define NFS4_dec_bind_conn_to_session_sz \
767 (compound_decode_hdr_maxsz + \
768 decode_bind_conn_to_session_maxsz)
769 #define NFS4_enc_exchange_id_sz \
770 (compound_encode_hdr_maxsz + \
771 encode_exchange_id_maxsz)
772 #define NFS4_dec_exchange_id_sz \
773 (compound_decode_hdr_maxsz + \
774 decode_exchange_id_maxsz)
775 #define NFS4_enc_create_session_sz \
776 (compound_encode_hdr_maxsz + \
777 encode_create_session_maxsz)
778 #define NFS4_dec_create_session_sz \
779 (compound_decode_hdr_maxsz + \
780 decode_create_session_maxsz)
781 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
782 encode_destroy_session_maxsz)
783 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
784 decode_destroy_session_maxsz)
785 #define NFS4_enc_destroy_clientid_sz (compound_encode_hdr_maxsz + \
786 encode_destroy_clientid_maxsz)
787 #define NFS4_dec_destroy_clientid_sz (compound_decode_hdr_maxsz + \
788 decode_destroy_clientid_maxsz)
789 #define NFS4_enc_sequence_sz \
790 (compound_decode_hdr_maxsz + \
791 encode_sequence_maxsz)
792 #define NFS4_dec_sequence_sz \
793 (compound_decode_hdr_maxsz + \
794 decode_sequence_maxsz)
795 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
796 encode_sequence_maxsz + \
797 encode_putrootfh_maxsz + \
798 encode_fsinfo_maxsz)
799 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
800 decode_sequence_maxsz + \
801 decode_putrootfh_maxsz + \
802 decode_fsinfo_maxsz)
803 #define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
804 encode_sequence_maxsz + \
805 encode_reclaim_complete_maxsz)
806 #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
807 decode_sequence_maxsz + \
808 decode_reclaim_complete_maxsz)
809 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
810 encode_sequence_maxsz +\
811 encode_getdeviceinfo_maxsz)
812 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
813 decode_sequence_maxsz + \
814 decode_getdeviceinfo_maxsz)
815 #define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
816 encode_sequence_maxsz + \
817 encode_putfh_maxsz + \
818 encode_layoutget_maxsz)
819 #define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
820 decode_sequence_maxsz + \
821 decode_putfh_maxsz + \
822 decode_layoutget_maxsz)
823 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
824 encode_sequence_maxsz +\
825 encode_putfh_maxsz + \
826 encode_layoutcommit_maxsz + \
827 encode_getattr_maxsz)
828 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
829 decode_sequence_maxsz + \
830 decode_putfh_maxsz + \
831 decode_layoutcommit_maxsz + \
832 decode_getattr_maxsz)
833 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
834 encode_sequence_maxsz + \
835 encode_putfh_maxsz + \
836 encode_layoutreturn_maxsz)
837 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
838 decode_sequence_maxsz + \
839 decode_putfh_maxsz + \
840 decode_layoutreturn_maxsz)
841 #define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
842 encode_sequence_maxsz + \
843 encode_putrootfh_maxsz +\
844 encode_secinfo_no_name_maxsz)
845 #define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
846 decode_sequence_maxsz + \
847 decode_putrootfh_maxsz + \
848 decode_secinfo_no_name_maxsz)
849 #define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
850 encode_sequence_maxsz + \
851 encode_test_stateid_maxsz)
852 #define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
853 decode_sequence_maxsz + \
854 decode_test_stateid_maxsz)
855 #define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \
856 encode_sequence_maxsz + \
857 encode_free_stateid_maxsz)
858 #define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
859 decode_sequence_maxsz + \
860 decode_free_stateid_maxsz)
861
862 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
863 compound_encode_hdr_maxsz +
864 encode_sequence_maxsz +
865 encode_putfh_maxsz +
866 encode_getattr_maxsz) *
867 XDR_UNIT);
868
869 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
870 compound_decode_hdr_maxsz +
871 decode_sequence_maxsz +
872 decode_putfh_maxsz) *
873 XDR_UNIT);
874
875 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
876 compound_decode_hdr_maxsz +
877 decode_sequence_maxsz) *
878 XDR_UNIT);
879 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
880 #endif /* CONFIG_NFS_V4_1 */
881
882 static const umode_t nfs_type2fmt[] = {
883 [NF4BAD] = 0,
884 [NF4REG] = S_IFREG,
885 [NF4DIR] = S_IFDIR,
886 [NF4BLK] = S_IFBLK,
887 [NF4CHR] = S_IFCHR,
888 [NF4LNK] = S_IFLNK,
889 [NF4SOCK] = S_IFSOCK,
890 [NF4FIFO] = S_IFIFO,
891 [NF4ATTRDIR] = 0,
892 [NF4NAMEDATTR] = 0,
893 };
894
895 struct compound_hdr {
896 int32_t status;
897 uint32_t nops;
898 __be32 * nops_p;
899 uint32_t taglen;
900 char * tag;
901 uint32_t replen; /* expected reply words */
902 u32 minorversion;
903 };
904
reserve_space(struct xdr_stream * xdr,size_t nbytes)905 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
906 {
907 __be32 *p = xdr_reserve_space(xdr, nbytes);
908 BUG_ON(!p);
909 return p;
910 }
911
encode_opaque_fixed(struct xdr_stream * xdr,const void * buf,size_t len)912 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
913 {
914 __be32 *p;
915
916 p = xdr_reserve_space(xdr, len);
917 xdr_encode_opaque_fixed(p, buf, len);
918 }
919
encode_string(struct xdr_stream * xdr,unsigned int len,const char * str)920 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
921 {
922 __be32 *p;
923
924 p = reserve_space(xdr, 4 + len);
925 xdr_encode_opaque(p, str, len);
926 }
927
encode_uint32(struct xdr_stream * xdr,u32 n)928 static void encode_uint32(struct xdr_stream *xdr, u32 n)
929 {
930 __be32 *p;
931
932 p = reserve_space(xdr, 4);
933 *p = cpu_to_be32(n);
934 }
935
encode_uint64(struct xdr_stream * xdr,u64 n)936 static void encode_uint64(struct xdr_stream *xdr, u64 n)
937 {
938 __be32 *p;
939
940 p = reserve_space(xdr, 8);
941 xdr_encode_hyper(p, n);
942 }
943
encode_nfs4_seqid(struct xdr_stream * xdr,const struct nfs_seqid * seqid)944 static void encode_nfs4_seqid(struct xdr_stream *xdr,
945 const struct nfs_seqid *seqid)
946 {
947 encode_uint32(xdr, seqid->sequence->counter);
948 }
949
encode_compound_hdr(struct xdr_stream * xdr,struct rpc_rqst * req,struct compound_hdr * hdr)950 static void encode_compound_hdr(struct xdr_stream *xdr,
951 struct rpc_rqst *req,
952 struct compound_hdr *hdr)
953 {
954 __be32 *p;
955 struct rpc_auth *auth = req->rq_cred->cr_auth;
956
957 /* initialize running count of expected bytes in reply.
958 * NOTE: the replied tag SHOULD be the same is the one sent,
959 * but this is not required as a MUST for the server to do so. */
960 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
961
962 WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
963 encode_string(xdr, hdr->taglen, hdr->tag);
964 p = reserve_space(xdr, 8);
965 *p++ = cpu_to_be32(hdr->minorversion);
966 hdr->nops_p = p;
967 *p = cpu_to_be32(hdr->nops);
968 }
969
encode_op_hdr(struct xdr_stream * xdr,enum nfs_opnum4 op,uint32_t replen,struct compound_hdr * hdr)970 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
971 uint32_t replen,
972 struct compound_hdr *hdr)
973 {
974 encode_uint32(xdr, op);
975 hdr->nops++;
976 hdr->replen += replen;
977 }
978
encode_nops(struct compound_hdr * hdr)979 static void encode_nops(struct compound_hdr *hdr)
980 {
981 WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
982 *hdr->nops_p = htonl(hdr->nops);
983 }
984
encode_nfs4_stateid(struct xdr_stream * xdr,const nfs4_stateid * stateid)985 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
986 {
987 encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
988 }
989
encode_nfs4_verifier(struct xdr_stream * xdr,const nfs4_verifier * verf)990 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
991 {
992 encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
993 }
994
encode_attrs(struct xdr_stream * xdr,const struct iattr * iap,const struct nfs4_label * label,const struct nfs_server * server)995 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
996 const struct nfs4_label *label,
997 const struct nfs_server *server)
998 {
999 char owner_name[IDMAP_NAMESZ];
1000 char owner_group[IDMAP_NAMESZ];
1001 int owner_namelen = 0;
1002 int owner_grouplen = 0;
1003 __be32 *p;
1004 unsigned i;
1005 uint32_t len = 0;
1006 uint32_t bmval_len;
1007 uint32_t bmval[3] = { 0 };
1008
1009 /*
1010 * We reserve enough space to write the entire attribute buffer at once.
1011 * In the worst-case, this would be
1012 * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
1013 * = 40 bytes, plus any contribution from variable-length fields
1014 * such as owner/group.
1015 */
1016 if (iap->ia_valid & ATTR_SIZE) {
1017 bmval[0] |= FATTR4_WORD0_SIZE;
1018 len += 8;
1019 }
1020 if (iap->ia_valid & ATTR_MODE) {
1021 bmval[1] |= FATTR4_WORD1_MODE;
1022 len += 4;
1023 }
1024 if (iap->ia_valid & ATTR_UID) {
1025 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1026 if (owner_namelen < 0) {
1027 dprintk("nfs: couldn't resolve uid %d to string\n",
1028 from_kuid(&init_user_ns, iap->ia_uid));
1029 /* XXX */
1030 strcpy(owner_name, "nobody");
1031 owner_namelen = sizeof("nobody") - 1;
1032 /* goto out; */
1033 }
1034 bmval[1] |= FATTR4_WORD1_OWNER;
1035 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1036 }
1037 if (iap->ia_valid & ATTR_GID) {
1038 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1039 if (owner_grouplen < 0) {
1040 dprintk("nfs: couldn't resolve gid %d to string\n",
1041 from_kgid(&init_user_ns, iap->ia_gid));
1042 strcpy(owner_group, "nobody");
1043 owner_grouplen = sizeof("nobody") - 1;
1044 /* goto out; */
1045 }
1046 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1047 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1048 }
1049 if (iap->ia_valid & ATTR_ATIME_SET) {
1050 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1051 len += 16;
1052 } else if (iap->ia_valid & ATTR_ATIME) {
1053 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1054 len += 4;
1055 }
1056 if (iap->ia_valid & ATTR_MTIME_SET) {
1057 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1058 len += 16;
1059 } else if (iap->ia_valid & ATTR_MTIME) {
1060 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1061 len += 4;
1062 }
1063 if (label) {
1064 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1065 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1066 }
1067
1068 if (bmval[2] != 0)
1069 bmval_len = 3;
1070 else if (bmval[1] != 0)
1071 bmval_len = 2;
1072 else
1073 bmval_len = 1;
1074
1075 p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1076
1077 *p++ = cpu_to_be32(bmval_len);
1078 for (i = 0; i < bmval_len; i++)
1079 *p++ = cpu_to_be32(bmval[i]);
1080 *p++ = cpu_to_be32(len);
1081
1082 if (bmval[0] & FATTR4_WORD0_SIZE)
1083 p = xdr_encode_hyper(p, iap->ia_size);
1084 if (bmval[1] & FATTR4_WORD1_MODE)
1085 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1086 if (bmval[1] & FATTR4_WORD1_OWNER)
1087 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1088 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1089 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1090 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1091 if (iap->ia_valid & ATTR_ATIME_SET) {
1092 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1093 p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1094 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1095 } else
1096 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1097 }
1098 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1099 if (iap->ia_valid & ATTR_MTIME_SET) {
1100 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1101 p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1102 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1103 } else
1104 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1105 }
1106 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1107 *p++ = cpu_to_be32(label->lfs);
1108 *p++ = cpu_to_be32(label->pi);
1109 *p++ = cpu_to_be32(label->len);
1110 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1111 }
1112
1113 /* out: */
1114 }
1115
encode_access(struct xdr_stream * xdr,u32 access,struct compound_hdr * hdr)1116 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1117 {
1118 encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1119 encode_uint32(xdr, access);
1120 }
1121
encode_close(struct xdr_stream * xdr,const struct nfs_closeargs * arg,struct compound_hdr * hdr)1122 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1123 {
1124 encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1125 encode_nfs4_seqid(xdr, arg->seqid);
1126 encode_nfs4_stateid(xdr, arg->stateid);
1127 }
1128
encode_commit(struct xdr_stream * xdr,const struct nfs_commitargs * args,struct compound_hdr * hdr)1129 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1130 {
1131 __be32 *p;
1132
1133 encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1134 p = reserve_space(xdr, 12);
1135 p = xdr_encode_hyper(p, args->offset);
1136 *p = cpu_to_be32(args->count);
1137 }
1138
encode_create(struct xdr_stream * xdr,const struct nfs4_create_arg * create,struct compound_hdr * hdr)1139 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1140 {
1141 __be32 *p;
1142
1143 encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1144 encode_uint32(xdr, create->ftype);
1145
1146 switch (create->ftype) {
1147 case NF4LNK:
1148 p = reserve_space(xdr, 4);
1149 *p = cpu_to_be32(create->u.symlink.len);
1150 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1151 break;
1152
1153 case NF4BLK: case NF4CHR:
1154 p = reserve_space(xdr, 8);
1155 *p++ = cpu_to_be32(create->u.device.specdata1);
1156 *p = cpu_to_be32(create->u.device.specdata2);
1157 break;
1158
1159 default:
1160 break;
1161 }
1162
1163 encode_string(xdr, create->name->len, create->name->name);
1164 encode_attrs(xdr, create->attrs, create->label, create->server);
1165 }
1166
encode_getattr_one(struct xdr_stream * xdr,uint32_t bitmap,struct compound_hdr * hdr)1167 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1168 {
1169 __be32 *p;
1170
1171 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1172 p = reserve_space(xdr, 8);
1173 *p++ = cpu_to_be32(1);
1174 *p = cpu_to_be32(bitmap);
1175 }
1176
encode_getattr_two(struct xdr_stream * xdr,uint32_t bm0,uint32_t bm1,struct compound_hdr * hdr)1177 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1178 {
1179 __be32 *p;
1180
1181 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1182 p = reserve_space(xdr, 12);
1183 *p++ = cpu_to_be32(2);
1184 *p++ = cpu_to_be32(bm0);
1185 *p = cpu_to_be32(bm1);
1186 }
1187
1188 static void
encode_getattr_three(struct xdr_stream * xdr,uint32_t bm0,uint32_t bm1,uint32_t bm2,struct compound_hdr * hdr)1189 encode_getattr_three(struct xdr_stream *xdr,
1190 uint32_t bm0, uint32_t bm1, uint32_t bm2,
1191 struct compound_hdr *hdr)
1192 {
1193 __be32 *p;
1194
1195 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1196 if (bm2) {
1197 p = reserve_space(xdr, 16);
1198 *p++ = cpu_to_be32(3);
1199 *p++ = cpu_to_be32(bm0);
1200 *p++ = cpu_to_be32(bm1);
1201 *p = cpu_to_be32(bm2);
1202 } else if (bm1) {
1203 p = reserve_space(xdr, 12);
1204 *p++ = cpu_to_be32(2);
1205 *p++ = cpu_to_be32(bm0);
1206 *p = cpu_to_be32(bm1);
1207 } else {
1208 p = reserve_space(xdr, 8);
1209 *p++ = cpu_to_be32(1);
1210 *p = cpu_to_be32(bm0);
1211 }
1212 }
1213
encode_getfattr(struct xdr_stream * xdr,const u32 * bitmask,struct compound_hdr * hdr)1214 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1215 {
1216 encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1217 bitmask[1] & nfs4_fattr_bitmap[1],
1218 bitmask[2] & nfs4_fattr_bitmap[2],
1219 hdr);
1220 }
1221
encode_getfattr_open(struct xdr_stream * xdr,const u32 * bitmask,const u32 * open_bitmap,struct compound_hdr * hdr)1222 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1223 const u32 *open_bitmap,
1224 struct compound_hdr *hdr)
1225 {
1226 encode_getattr_three(xdr,
1227 bitmask[0] & open_bitmap[0],
1228 bitmask[1] & open_bitmap[1],
1229 bitmask[2] & open_bitmap[2],
1230 hdr);
1231 }
1232
encode_fsinfo(struct xdr_stream * xdr,const u32 * bitmask,struct compound_hdr * hdr)1233 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1234 {
1235 encode_getattr_three(xdr,
1236 bitmask[0] & nfs4_fsinfo_bitmap[0],
1237 bitmask[1] & nfs4_fsinfo_bitmap[1],
1238 bitmask[2] & nfs4_fsinfo_bitmap[2],
1239 hdr);
1240 }
1241
encode_fs_locations(struct xdr_stream * xdr,const u32 * bitmask,struct compound_hdr * hdr)1242 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1243 {
1244 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1245 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1246 }
1247
encode_getfh(struct xdr_stream * xdr,struct compound_hdr * hdr)1248 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1249 {
1250 encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1251 }
1252
encode_link(struct xdr_stream * xdr,const struct qstr * name,struct compound_hdr * hdr)1253 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1254 {
1255 encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1256 encode_string(xdr, name->len, name->name);
1257 }
1258
nfs4_lock_type(struct file_lock * fl,int block)1259 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1260 {
1261 if (fl->fl_type == F_RDLCK)
1262 return block ? NFS4_READW_LT : NFS4_READ_LT;
1263 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1264 }
1265
nfs4_lock_length(struct file_lock * fl)1266 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1267 {
1268 if (fl->fl_end == OFFSET_MAX)
1269 return ~(uint64_t)0;
1270 return fl->fl_end - fl->fl_start + 1;
1271 }
1272
encode_lockowner(struct xdr_stream * xdr,const struct nfs_lowner * lowner)1273 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1274 {
1275 __be32 *p;
1276
1277 p = reserve_space(xdr, 32);
1278 p = xdr_encode_hyper(p, lowner->clientid);
1279 *p++ = cpu_to_be32(20);
1280 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1281 *p++ = cpu_to_be32(lowner->s_dev);
1282 xdr_encode_hyper(p, lowner->id);
1283 }
1284
1285 /*
1286 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1287 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1288 */
encode_lock(struct xdr_stream * xdr,const struct nfs_lock_args * args,struct compound_hdr * hdr)1289 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1290 {
1291 __be32 *p;
1292
1293 encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1294 p = reserve_space(xdr, 28);
1295 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1296 *p++ = cpu_to_be32(args->reclaim);
1297 p = xdr_encode_hyper(p, args->fl->fl_start);
1298 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1299 *p = cpu_to_be32(args->new_lock_owner);
1300 if (args->new_lock_owner){
1301 encode_nfs4_seqid(xdr, args->open_seqid);
1302 encode_nfs4_stateid(xdr, args->open_stateid);
1303 encode_nfs4_seqid(xdr, args->lock_seqid);
1304 encode_lockowner(xdr, &args->lock_owner);
1305 }
1306 else {
1307 encode_nfs4_stateid(xdr, args->lock_stateid);
1308 encode_nfs4_seqid(xdr, args->lock_seqid);
1309 }
1310 }
1311
encode_lockt(struct xdr_stream * xdr,const struct nfs_lockt_args * args,struct compound_hdr * hdr)1312 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1313 {
1314 __be32 *p;
1315
1316 encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1317 p = reserve_space(xdr, 20);
1318 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1319 p = xdr_encode_hyper(p, args->fl->fl_start);
1320 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1321 encode_lockowner(xdr, &args->lock_owner);
1322 }
1323
encode_locku(struct xdr_stream * xdr,const struct nfs_locku_args * args,struct compound_hdr * hdr)1324 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1325 {
1326 __be32 *p;
1327
1328 encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1329 encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1330 encode_nfs4_seqid(xdr, args->seqid);
1331 encode_nfs4_stateid(xdr, args->stateid);
1332 p = reserve_space(xdr, 16);
1333 p = xdr_encode_hyper(p, args->fl->fl_start);
1334 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1335 }
1336
encode_release_lockowner(struct xdr_stream * xdr,const struct nfs_lowner * lowner,struct compound_hdr * hdr)1337 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1338 {
1339 encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1340 encode_lockowner(xdr, lowner);
1341 }
1342
encode_lookup(struct xdr_stream * xdr,const struct qstr * name,struct compound_hdr * hdr)1343 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1344 {
1345 encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1346 encode_string(xdr, name->len, name->name);
1347 }
1348
encode_share_access(struct xdr_stream * xdr,fmode_t fmode)1349 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1350 {
1351 __be32 *p;
1352
1353 p = reserve_space(xdr, 8);
1354 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1355 case FMODE_READ:
1356 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1357 break;
1358 case FMODE_WRITE:
1359 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1360 break;
1361 case FMODE_READ|FMODE_WRITE:
1362 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1363 break;
1364 default:
1365 *p++ = cpu_to_be32(0);
1366 }
1367 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1368 }
1369
encode_openhdr(struct xdr_stream * xdr,const struct nfs_openargs * arg)1370 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1371 {
1372 __be32 *p;
1373 /*
1374 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1375 * owner 4 = 32
1376 */
1377 encode_nfs4_seqid(xdr, arg->seqid);
1378 encode_share_access(xdr, arg->fmode);
1379 p = reserve_space(xdr, 36);
1380 p = xdr_encode_hyper(p, arg->clientid);
1381 *p++ = cpu_to_be32(24);
1382 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1383 *p++ = cpu_to_be32(arg->server->s_dev);
1384 *p++ = cpu_to_be32(arg->id.uniquifier);
1385 xdr_encode_hyper(p, arg->id.create_time);
1386 }
1387
encode_createmode(struct xdr_stream * xdr,const struct nfs_openargs * arg)1388 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1389 {
1390 struct iattr dummy;
1391 __be32 *p;
1392
1393 p = reserve_space(xdr, 4);
1394 switch(arg->createmode) {
1395 case NFS4_CREATE_UNCHECKED:
1396 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1397 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1398 break;
1399 case NFS4_CREATE_GUARDED:
1400 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1401 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
1402 break;
1403 case NFS4_CREATE_EXCLUSIVE:
1404 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1405 encode_nfs4_verifier(xdr, &arg->u.verifier);
1406 break;
1407 case NFS4_CREATE_EXCLUSIVE4_1:
1408 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1409 encode_nfs4_verifier(xdr, &arg->u.verifier);
1410 dummy.ia_valid = 0;
1411 encode_attrs(xdr, &dummy, arg->label, arg->server);
1412 }
1413 }
1414
encode_opentype(struct xdr_stream * xdr,const struct nfs_openargs * arg)1415 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1416 {
1417 __be32 *p;
1418
1419 p = reserve_space(xdr, 4);
1420 switch (arg->open_flags & O_CREAT) {
1421 case 0:
1422 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1423 break;
1424 default:
1425 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1426 encode_createmode(xdr, arg);
1427 }
1428 }
1429
encode_delegation_type(struct xdr_stream * xdr,fmode_t delegation_type)1430 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1431 {
1432 __be32 *p;
1433
1434 p = reserve_space(xdr, 4);
1435 switch (delegation_type) {
1436 case 0:
1437 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1438 break;
1439 case FMODE_READ:
1440 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1441 break;
1442 case FMODE_WRITE|FMODE_READ:
1443 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1444 break;
1445 default:
1446 BUG();
1447 }
1448 }
1449
encode_claim_null(struct xdr_stream * xdr,const struct qstr * name)1450 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1451 {
1452 __be32 *p;
1453
1454 p = reserve_space(xdr, 4);
1455 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1456 encode_string(xdr, name->len, name->name);
1457 }
1458
encode_claim_previous(struct xdr_stream * xdr,fmode_t type)1459 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1460 {
1461 __be32 *p;
1462
1463 p = reserve_space(xdr, 4);
1464 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1465 encode_delegation_type(xdr, type);
1466 }
1467
encode_claim_delegate_cur(struct xdr_stream * xdr,const struct qstr * name,const nfs4_stateid * stateid)1468 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1469 {
1470 __be32 *p;
1471
1472 p = reserve_space(xdr, 4);
1473 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1474 encode_nfs4_stateid(xdr, stateid);
1475 encode_string(xdr, name->len, name->name);
1476 }
1477
encode_claim_fh(struct xdr_stream * xdr)1478 static inline void encode_claim_fh(struct xdr_stream *xdr)
1479 {
1480 __be32 *p;
1481
1482 p = reserve_space(xdr, 4);
1483 *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1484 }
1485
encode_claim_delegate_cur_fh(struct xdr_stream * xdr,const nfs4_stateid * stateid)1486 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1487 {
1488 __be32 *p;
1489
1490 p = reserve_space(xdr, 4);
1491 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1492 encode_nfs4_stateid(xdr, stateid);
1493 }
1494
encode_open(struct xdr_stream * xdr,const struct nfs_openargs * arg,struct compound_hdr * hdr)1495 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1496 {
1497 encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1498 encode_openhdr(xdr, arg);
1499 encode_opentype(xdr, arg);
1500 switch (arg->claim) {
1501 case NFS4_OPEN_CLAIM_NULL:
1502 encode_claim_null(xdr, arg->name);
1503 break;
1504 case NFS4_OPEN_CLAIM_PREVIOUS:
1505 encode_claim_previous(xdr, arg->u.delegation_type);
1506 break;
1507 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1508 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1509 break;
1510 case NFS4_OPEN_CLAIM_FH:
1511 encode_claim_fh(xdr);
1512 break;
1513 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1514 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1515 break;
1516 default:
1517 BUG();
1518 }
1519 }
1520
encode_open_confirm(struct xdr_stream * xdr,const struct nfs_open_confirmargs * arg,struct compound_hdr * hdr)1521 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1522 {
1523 encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1524 encode_nfs4_stateid(xdr, arg->stateid);
1525 encode_nfs4_seqid(xdr, arg->seqid);
1526 }
1527
encode_open_downgrade(struct xdr_stream * xdr,const struct nfs_closeargs * arg,struct compound_hdr * hdr)1528 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1529 {
1530 encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1531 encode_nfs4_stateid(xdr, arg->stateid);
1532 encode_nfs4_seqid(xdr, arg->seqid);
1533 encode_share_access(xdr, arg->fmode);
1534 }
1535
1536 static void
encode_putfh(struct xdr_stream * xdr,const struct nfs_fh * fh,struct compound_hdr * hdr)1537 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1538 {
1539 encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1540 encode_string(xdr, fh->size, fh->data);
1541 }
1542
encode_putrootfh(struct xdr_stream * xdr,struct compound_hdr * hdr)1543 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1544 {
1545 encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1546 }
1547
encode_read(struct xdr_stream * xdr,const struct nfs_pgio_args * args,struct compound_hdr * hdr)1548 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1549 struct compound_hdr *hdr)
1550 {
1551 __be32 *p;
1552
1553 encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1554 encode_nfs4_stateid(xdr, &args->stateid);
1555
1556 p = reserve_space(xdr, 12);
1557 p = xdr_encode_hyper(p, args->offset);
1558 *p = cpu_to_be32(args->count);
1559 }
1560
encode_readdir(struct xdr_stream * xdr,const struct nfs4_readdir_arg * readdir,struct rpc_rqst * req,struct compound_hdr * hdr)1561 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1562 {
1563 uint32_t attrs[3] = {
1564 FATTR4_WORD0_RDATTR_ERROR,
1565 FATTR4_WORD1_MOUNTED_ON_FILEID,
1566 };
1567 uint32_t dircount = readdir->count >> 1;
1568 __be32 *p, verf[2];
1569 uint32_t attrlen = 0;
1570 unsigned int i;
1571
1572 if (readdir->plus) {
1573 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1574 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1575 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1576 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1577 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1578 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1579 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1580 dircount >>= 1;
1581 }
1582 /* Use mounted_on_fileid only if the server supports it */
1583 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1584 attrs[0] |= FATTR4_WORD0_FILEID;
1585 for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1586 attrs[i] &= readdir->bitmask[i];
1587 if (attrs[i] != 0)
1588 attrlen = i+1;
1589 }
1590
1591 encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1592 encode_uint64(xdr, readdir->cookie);
1593 encode_nfs4_verifier(xdr, &readdir->verifier);
1594 p = reserve_space(xdr, 12 + (attrlen << 2));
1595 *p++ = cpu_to_be32(dircount);
1596 *p++ = cpu_to_be32(readdir->count);
1597 *p++ = cpu_to_be32(attrlen);
1598 for (i = 0; i < attrlen; i++)
1599 *p++ = cpu_to_be32(attrs[i]);
1600 memcpy(verf, readdir->verifier.data, sizeof(verf));
1601
1602 dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1603 __func__,
1604 (unsigned long long)readdir->cookie,
1605 verf[0], verf[1],
1606 attrs[0] & readdir->bitmask[0],
1607 attrs[1] & readdir->bitmask[1],
1608 attrs[2] & readdir->bitmask[2]);
1609 }
1610
encode_readlink(struct xdr_stream * xdr,const struct nfs4_readlink * readlink,struct rpc_rqst * req,struct compound_hdr * hdr)1611 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1612 {
1613 encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1614 }
1615
encode_remove(struct xdr_stream * xdr,const struct qstr * name,struct compound_hdr * hdr)1616 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1617 {
1618 encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1619 encode_string(xdr, name->len, name->name);
1620 }
1621
encode_rename(struct xdr_stream * xdr,const struct qstr * oldname,const struct qstr * newname,struct compound_hdr * hdr)1622 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1623 {
1624 encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1625 encode_string(xdr, oldname->len, oldname->name);
1626 encode_string(xdr, newname->len, newname->name);
1627 }
1628
encode_renew(struct xdr_stream * xdr,clientid4 clid,struct compound_hdr * hdr)1629 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1630 struct compound_hdr *hdr)
1631 {
1632 encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1633 encode_uint64(xdr, clid);
1634 }
1635
1636 static void
encode_restorefh(struct xdr_stream * xdr,struct compound_hdr * hdr)1637 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1638 {
1639 encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1640 }
1641
1642 static void
encode_setacl(struct xdr_stream * xdr,struct nfs_setaclargs * arg,struct compound_hdr * hdr)1643 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1644 {
1645 __be32 *p;
1646
1647 encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1648 encode_nfs4_stateid(xdr, &zero_stateid);
1649 p = reserve_space(xdr, 2*4);
1650 *p++ = cpu_to_be32(1);
1651 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1652 p = reserve_space(xdr, 4);
1653 *p = cpu_to_be32(arg->acl_len);
1654 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1655 }
1656
1657 static void
encode_savefh(struct xdr_stream * xdr,struct compound_hdr * hdr)1658 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1659 {
1660 encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1661 }
1662
encode_setattr(struct xdr_stream * xdr,const struct nfs_setattrargs * arg,const struct nfs_server * server,struct compound_hdr * hdr)1663 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1664 {
1665 encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1666 encode_nfs4_stateid(xdr, &arg->stateid);
1667 encode_attrs(xdr, arg->iap, arg->label, server);
1668 }
1669
encode_setclientid(struct xdr_stream * xdr,const struct nfs4_setclientid * setclientid,struct compound_hdr * hdr)1670 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1671 {
1672 __be32 *p;
1673
1674 encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1675 encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1676
1677 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1678 p = reserve_space(xdr, 4);
1679 *p = cpu_to_be32(setclientid->sc_prog);
1680 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1681 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1682 p = reserve_space(xdr, 4);
1683 *p = cpu_to_be32(setclientid->sc_cb_ident);
1684 }
1685
encode_setclientid_confirm(struct xdr_stream * xdr,const struct nfs4_setclientid_res * arg,struct compound_hdr * hdr)1686 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1687 {
1688 encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1689 decode_setclientid_confirm_maxsz, hdr);
1690 encode_uint64(xdr, arg->clientid);
1691 encode_nfs4_verifier(xdr, &arg->confirm);
1692 }
1693
encode_write(struct xdr_stream * xdr,const struct nfs_pgio_args * args,struct compound_hdr * hdr)1694 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1695 struct compound_hdr *hdr)
1696 {
1697 __be32 *p;
1698
1699 encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1700 encode_nfs4_stateid(xdr, &args->stateid);
1701
1702 p = reserve_space(xdr, 16);
1703 p = xdr_encode_hyper(p, args->offset);
1704 *p++ = cpu_to_be32(args->stable);
1705 *p = cpu_to_be32(args->count);
1706
1707 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1708 }
1709
encode_delegreturn(struct xdr_stream * xdr,const nfs4_stateid * stateid,struct compound_hdr * hdr)1710 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1711 {
1712 encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1713 encode_nfs4_stateid(xdr, stateid);
1714 }
1715
encode_secinfo(struct xdr_stream * xdr,const struct qstr * name,struct compound_hdr * hdr)1716 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1717 {
1718 encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1719 encode_string(xdr, name->len, name->name);
1720 }
1721
1722 #if defined(CONFIG_NFS_V4_1)
1723 /* NFSv4.1 operations */
encode_bind_conn_to_session(struct xdr_stream * xdr,struct nfs4_session * session,struct compound_hdr * hdr)1724 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1725 struct nfs4_session *session,
1726 struct compound_hdr *hdr)
1727 {
1728 __be32 *p;
1729
1730 encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1731 decode_bind_conn_to_session_maxsz, hdr);
1732 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1733 p = xdr_reserve_space(xdr, 8);
1734 *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH);
1735 *p = 0; /* use_conn_in_rdma_mode = False */
1736 }
1737
encode_op_map(struct xdr_stream * xdr,struct nfs4_op_map * op_map)1738 static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1739 {
1740 unsigned int i;
1741 encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1742 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1743 encode_uint32(xdr, op_map->u.words[i]);
1744 }
1745
encode_exchange_id(struct xdr_stream * xdr,struct nfs41_exchange_id_args * args,struct compound_hdr * hdr)1746 static void encode_exchange_id(struct xdr_stream *xdr,
1747 struct nfs41_exchange_id_args *args,
1748 struct compound_hdr *hdr)
1749 {
1750 __be32 *p;
1751 char impl_name[IMPL_NAME_LIMIT];
1752 int len = 0;
1753
1754 encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1755 encode_nfs4_verifier(xdr, args->verifier);
1756
1757 encode_string(xdr, args->id_len, args->id);
1758
1759 encode_uint32(xdr, args->flags);
1760 encode_uint32(xdr, args->state_protect.how);
1761
1762 switch (args->state_protect.how) {
1763 case SP4_NONE:
1764 break;
1765 case SP4_MACH_CRED:
1766 encode_op_map(xdr, &args->state_protect.enforce);
1767 encode_op_map(xdr, &args->state_protect.allow);
1768 break;
1769 default:
1770 WARN_ON_ONCE(1);
1771 break;
1772 }
1773
1774 if (send_implementation_id &&
1775 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1776 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1777 <= sizeof(impl_name) + 1)
1778 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1779 utsname()->sysname, utsname()->release,
1780 utsname()->version, utsname()->machine);
1781
1782 if (len > 0) {
1783 encode_uint32(xdr, 1); /* implementation id array length=1 */
1784
1785 encode_string(xdr,
1786 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1787 CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1788 encode_string(xdr, len, impl_name);
1789 /* just send zeros for nii_date - the date is in nii_name */
1790 p = reserve_space(xdr, 12);
1791 p = xdr_encode_hyper(p, 0);
1792 *p = cpu_to_be32(0);
1793 } else
1794 encode_uint32(xdr, 0); /* implementation id array length=0 */
1795 }
1796
encode_create_session(struct xdr_stream * xdr,struct nfs41_create_session_args * args,struct compound_hdr * hdr)1797 static void encode_create_session(struct xdr_stream *xdr,
1798 struct nfs41_create_session_args *args,
1799 struct compound_hdr *hdr)
1800 {
1801 __be32 *p;
1802 char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1803 uint32_t len;
1804 struct nfs_client *clp = args->client;
1805 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1806 u32 max_resp_sz_cached;
1807
1808 /*
1809 * Assumes OPEN is the biggest non-idempotent compound.
1810 * 2 is the verifier.
1811 */
1812 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1813 RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1814
1815 len = scnprintf(machine_name, sizeof(machine_name), "%s",
1816 clp->cl_ipaddr);
1817
1818 encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1819 p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12);
1820 p = xdr_encode_hyper(p, clp->cl_clientid);
1821 *p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */
1822 *p++ = cpu_to_be32(args->flags); /*flags */
1823
1824 /* Fore Channel */
1825 *p++ = cpu_to_be32(0); /* header padding size */
1826 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1827 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1828 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1829 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1830 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1831 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1832
1833 /* Back Channel */
1834 *p++ = cpu_to_be32(0); /* header padding size */
1835 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1836 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1837 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1838 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1839 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1840 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1841
1842 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1843 *p++ = cpu_to_be32(1);
1844 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1845
1846 /* authsys_parms rfc1831 */
1847 *p++ = cpu_to_be32(nn->boot_time.tv_nsec); /* stamp */
1848 p = xdr_encode_opaque(p, machine_name, len);
1849 *p++ = cpu_to_be32(0); /* UID */
1850 *p++ = cpu_to_be32(0); /* GID */
1851 *p = cpu_to_be32(0); /* No more gids */
1852 }
1853
encode_destroy_session(struct xdr_stream * xdr,struct nfs4_session * session,struct compound_hdr * hdr)1854 static void encode_destroy_session(struct xdr_stream *xdr,
1855 struct nfs4_session *session,
1856 struct compound_hdr *hdr)
1857 {
1858 encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1859 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1860 }
1861
encode_destroy_clientid(struct xdr_stream * xdr,uint64_t clientid,struct compound_hdr * hdr)1862 static void encode_destroy_clientid(struct xdr_stream *xdr,
1863 uint64_t clientid,
1864 struct compound_hdr *hdr)
1865 {
1866 encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1867 encode_uint64(xdr, clientid);
1868 }
1869
encode_reclaim_complete(struct xdr_stream * xdr,struct nfs41_reclaim_complete_args * args,struct compound_hdr * hdr)1870 static void encode_reclaim_complete(struct xdr_stream *xdr,
1871 struct nfs41_reclaim_complete_args *args,
1872 struct compound_hdr *hdr)
1873 {
1874 encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1875 encode_uint32(xdr, args->one_fs);
1876 }
1877 #endif /* CONFIG_NFS_V4_1 */
1878
encode_sequence(struct xdr_stream * xdr,const struct nfs4_sequence_args * args,struct compound_hdr * hdr)1879 static void encode_sequence(struct xdr_stream *xdr,
1880 const struct nfs4_sequence_args *args,
1881 struct compound_hdr *hdr)
1882 {
1883 #if defined(CONFIG_NFS_V4_1)
1884 struct nfs4_session *session;
1885 struct nfs4_slot_table *tp;
1886 struct nfs4_slot *slot = args->sa_slot;
1887 __be32 *p;
1888
1889 tp = slot->table;
1890 session = tp->session;
1891 if (!session)
1892 return;
1893
1894 encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1895
1896 /*
1897 * Sessionid + seqid + slotid + max slotid + cache_this
1898 */
1899 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1900 "max_slotid=%d cache_this=%d\n",
1901 __func__,
1902 ((u32 *)session->sess_id.data)[0],
1903 ((u32 *)session->sess_id.data)[1],
1904 ((u32 *)session->sess_id.data)[2],
1905 ((u32 *)session->sess_id.data)[3],
1906 slot->seq_nr, slot->slot_nr,
1907 tp->highest_used_slotid, args->sa_cache_this);
1908 p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1909 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1910 *p++ = cpu_to_be32(slot->seq_nr);
1911 *p++ = cpu_to_be32(slot->slot_nr);
1912 *p++ = cpu_to_be32(tp->highest_used_slotid);
1913 *p = cpu_to_be32(args->sa_cache_this);
1914 #endif /* CONFIG_NFS_V4_1 */
1915 }
1916
1917 #ifdef CONFIG_NFS_V4_1
1918 static void
encode_getdeviceinfo(struct xdr_stream * xdr,const struct nfs4_getdeviceinfo_args * args,struct compound_hdr * hdr)1919 encode_getdeviceinfo(struct xdr_stream *xdr,
1920 const struct nfs4_getdeviceinfo_args *args,
1921 struct compound_hdr *hdr)
1922 {
1923 __be32 *p;
1924
1925 encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1926 p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1927 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1928 NFS4_DEVICEID4_SIZE);
1929 *p++ = cpu_to_be32(args->pdev->layout_type);
1930 *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */
1931
1932 p = reserve_space(xdr, 4 + 4);
1933 *p++ = cpu_to_be32(1); /* bitmap length */
1934 *p++ = cpu_to_be32(NOTIFY_DEVICEID4_CHANGE | NOTIFY_DEVICEID4_DELETE);
1935 }
1936
1937 static void
encode_layoutget(struct xdr_stream * xdr,const struct nfs4_layoutget_args * args,struct compound_hdr * hdr)1938 encode_layoutget(struct xdr_stream *xdr,
1939 const struct nfs4_layoutget_args *args,
1940 struct compound_hdr *hdr)
1941 {
1942 __be32 *p;
1943
1944 encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1945 p = reserve_space(xdr, 36);
1946 *p++ = cpu_to_be32(0); /* Signal layout available */
1947 *p++ = cpu_to_be32(args->type);
1948 *p++ = cpu_to_be32(args->range.iomode);
1949 p = xdr_encode_hyper(p, args->range.offset);
1950 p = xdr_encode_hyper(p, args->range.length);
1951 p = xdr_encode_hyper(p, args->minlength);
1952 encode_nfs4_stateid(xdr, &args->stateid);
1953 encode_uint32(xdr, args->maxcount);
1954
1955 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1956 __func__,
1957 args->type,
1958 args->range.iomode,
1959 (unsigned long)args->range.offset,
1960 (unsigned long)args->range.length,
1961 args->maxcount);
1962 }
1963
1964 static int
encode_layoutcommit(struct xdr_stream * xdr,struct inode * inode,struct nfs4_layoutcommit_args * args,struct compound_hdr * hdr)1965 encode_layoutcommit(struct xdr_stream *xdr,
1966 struct inode *inode,
1967 struct nfs4_layoutcommit_args *args,
1968 struct compound_hdr *hdr)
1969 {
1970 __be32 *p;
1971
1972 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1973 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1974
1975 encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
1976 p = reserve_space(xdr, 20);
1977 /* Only whole file layouts */
1978 p = xdr_encode_hyper(p, 0); /* offset */
1979 p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
1980 *p = cpu_to_be32(0); /* reclaim */
1981 encode_nfs4_stateid(xdr, &args->stateid);
1982 p = reserve_space(xdr, 20);
1983 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1984 p = xdr_encode_hyper(p, args->lastbytewritten);
1985 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1986 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1987
1988 if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) {
1989 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
1990 NFS_I(inode)->layout, xdr, args);
1991 } else {
1992 encode_uint32(xdr, args->layoutupdate_len);
1993 if (args->layoutupdate_pages) {
1994 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
1995 args->layoutupdate_len);
1996 }
1997 }
1998
1999 return 0;
2000 }
2001
2002 static void
encode_layoutreturn(struct xdr_stream * xdr,const struct nfs4_layoutreturn_args * args,struct compound_hdr * hdr)2003 encode_layoutreturn(struct xdr_stream *xdr,
2004 const struct nfs4_layoutreturn_args *args,
2005 struct compound_hdr *hdr)
2006 {
2007 __be32 *p;
2008
2009 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2010 p = reserve_space(xdr, 16);
2011 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
2012 *p++ = cpu_to_be32(args->layout_type);
2013 *p++ = cpu_to_be32(IOMODE_ANY);
2014 *p = cpu_to_be32(RETURN_FILE);
2015 p = reserve_space(xdr, 16);
2016 p = xdr_encode_hyper(p, 0);
2017 p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
2018 spin_lock(&args->inode->i_lock);
2019 encode_nfs4_stateid(xdr, &args->stateid);
2020 spin_unlock(&args->inode->i_lock);
2021 if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
2022 NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
2023 NFS_I(args->inode)->layout, xdr, args);
2024 } else
2025 encode_uint32(xdr, 0);
2026 }
2027
2028 static int
encode_secinfo_no_name(struct xdr_stream * xdr,const struct nfs41_secinfo_no_name_args * args,struct compound_hdr * hdr)2029 encode_secinfo_no_name(struct xdr_stream *xdr,
2030 const struct nfs41_secinfo_no_name_args *args,
2031 struct compound_hdr *hdr)
2032 {
2033 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2034 encode_uint32(xdr, args->style);
2035 return 0;
2036 }
2037
encode_test_stateid(struct xdr_stream * xdr,struct nfs41_test_stateid_args * args,struct compound_hdr * hdr)2038 static void encode_test_stateid(struct xdr_stream *xdr,
2039 struct nfs41_test_stateid_args *args,
2040 struct compound_hdr *hdr)
2041 {
2042 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2043 encode_uint32(xdr, 1);
2044 encode_nfs4_stateid(xdr, args->stateid);
2045 }
2046
encode_free_stateid(struct xdr_stream * xdr,struct nfs41_free_stateid_args * args,struct compound_hdr * hdr)2047 static void encode_free_stateid(struct xdr_stream *xdr,
2048 struct nfs41_free_stateid_args *args,
2049 struct compound_hdr *hdr)
2050 {
2051 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2052 encode_nfs4_stateid(xdr, &args->stateid);
2053 }
2054 #endif /* CONFIG_NFS_V4_1 */
2055
2056 /*
2057 * END OF "GENERIC" ENCODE ROUTINES.
2058 */
2059
nfs4_xdr_minorversion(const struct nfs4_sequence_args * args)2060 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2061 {
2062 #if defined(CONFIG_NFS_V4_1)
2063 struct nfs4_session *session = args->sa_slot->table->session;
2064 if (session)
2065 return session->clp->cl_mvops->minor_version;
2066 #endif /* CONFIG_NFS_V4_1 */
2067 return 0;
2068 }
2069
2070 /*
2071 * Encode an ACCESS request
2072 */
nfs4_xdr_enc_access(struct rpc_rqst * req,struct xdr_stream * xdr,const struct nfs4_accessargs * args)2073 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2074 const struct nfs4_accessargs *args)
2075 {
2076 struct compound_hdr hdr = {
2077 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2078 };
2079
2080 encode_compound_hdr(xdr, req, &hdr);
2081 encode_sequence(xdr, &args->seq_args, &hdr);
2082 encode_putfh(xdr, args->fh, &hdr);
2083 encode_access(xdr, args->access, &hdr);
2084 encode_getfattr(xdr, args->bitmask, &hdr);
2085 encode_nops(&hdr);
2086 }
2087
2088 /*
2089 * Encode LOOKUP request
2090 */
nfs4_xdr_enc_lookup(struct rpc_rqst * req,struct xdr_stream * xdr,const struct nfs4_lookup_arg * args)2091 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2092 const struct nfs4_lookup_arg *args)
2093 {
2094 struct compound_hdr hdr = {
2095 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2096 };
2097
2098 encode_compound_hdr(xdr, req, &hdr);
2099 encode_sequence(xdr, &args->seq_args, &hdr);
2100 encode_putfh(xdr, args->dir_fh, &hdr);
2101 encode_lookup(xdr, args->name, &hdr);
2102 encode_getfh(xdr, &hdr);
2103 encode_getfattr(xdr, args->bitmask, &hdr);
2104 encode_nops(&hdr);
2105 }
2106
2107 /*
2108 * Encode LOOKUP_ROOT request
2109 */
nfs4_xdr_enc_lookup_root(struct rpc_rqst * req,struct xdr_stream * xdr,const struct nfs4_lookup_root_arg * args)2110 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2111 struct xdr_stream *xdr,
2112 const struct nfs4_lookup_root_arg *args)
2113 {
2114 struct compound_hdr hdr = {
2115 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2116 };
2117
2118 encode_compound_hdr(xdr, req, &hdr);
2119 encode_sequence(xdr, &args->seq_args, &hdr);
2120 encode_putrootfh(xdr, &hdr);
2121 encode_getfh(xdr, &hdr);
2122 encode_getfattr(xdr, args->bitmask, &hdr);
2123 encode_nops(&hdr);
2124 }
2125
2126 /*
2127 * Encode REMOVE request
2128 */
nfs4_xdr_enc_remove(struct rpc_rqst * req,struct xdr_stream * xdr,const struct nfs_removeargs * args)2129 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2130 const struct nfs_removeargs *args)
2131 {
2132 struct compound_hdr hdr = {
2133 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2134 };
2135
2136 encode_compound_hdr(xdr, req, &hdr);
2137 encode_sequence(xdr, &args->seq_args, &hdr);
2138 encode_putfh(xdr, args->fh, &hdr);
2139 encode_remove(xdr, &args->name, &hdr);
2140 encode_nops(&hdr);
2141 }
2142
2143 /*
2144 * Encode RENAME request
2145 */
nfs4_xdr_enc_rename(struct rpc_rqst * req,struct xdr_stream * xdr,const struct nfs_renameargs * args)2146 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2147 const struct nfs_renameargs *args)
2148 {
2149 struct compound_hdr hdr = {
2150 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2151 };
2152
2153 encode_compound_hdr(xdr, req, &hdr);
2154 encode_sequence(xdr, &args->seq_args, &hdr);
2155 encode_putfh(xdr, args->old_dir, &hdr);
2156 encode_savefh(xdr, &hdr);
2157 encode_putfh(xdr, args->new_dir, &hdr);
2158 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2159 encode_nops(&hdr);
2160 }
2161
2162 /*
2163 * Encode LINK request
2164 */
nfs4_xdr_enc_link(struct rpc_rqst * req,struct xdr_stream * xdr,const struct nfs4_link_arg * args)2165 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2166 const struct nfs4_link_arg *args)
2167 {
2168 struct compound_hdr hdr = {
2169 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2170 };
2171
2172 encode_compound_hdr(xdr, req, &hdr);
2173 encode_sequence(xdr, &args->seq_args, &hdr);
2174 encode_putfh(xdr, args->fh, &hdr);
2175 encode_savefh(xdr, &hdr);
2176 encode_putfh(xdr, args->dir_fh, &hdr);
2177 encode_link(xdr, args->name, &hdr);
2178 encode_restorefh(xdr, &hdr);
2179 encode_getfattr(xdr, args->bitmask, &hdr);
2180 encode_nops(&hdr);
2181 }
2182
2183 /*
2184 * Encode CREATE request
2185 */
nfs4_xdr_enc_create(struct rpc_rqst * req,struct xdr_stream * xdr,const struct nfs4_create_arg * args)2186 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2187 const struct nfs4_create_arg *args)
2188 {
2189 struct compound_hdr hdr = {
2190 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2191 };
2192
2193 encode_compound_hdr(xdr, req, &hdr);
2194 encode_sequence(xdr, &args->seq_args, &hdr);
2195 encode_putfh(xdr, args->dir_fh, &hdr);
2196 encode_create(xdr, args, &hdr);
2197 encode_getfh(xdr, &hdr);
2198 encode_getfattr(xdr, args->bitmask, &hdr);
2199 encode_nops(&hdr);
2200 }
2201
2202 /*
2203 * Encode SYMLINK request
2204 */
nfs4_xdr_enc_symlink(struct rpc_rqst * req,struct xdr_stream * xdr,const struct nfs4_create_arg * args)2205 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2206 const struct nfs4_create_arg *args)
2207 {
2208 nfs4_xdr_enc_create(req, xdr, args);
2209 }
2210
2211 /*
2212 * Encode GETATTR request
2213 */
nfs4_xdr_enc_getattr(struct rpc_rqst * req,struct xdr_stream * xdr,const struct nfs4_getattr_arg * args)2214 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2215 const struct nfs4_getattr_arg *args)
2216 {
2217 struct compound_hdr hdr = {
2218 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2219 };
2220
2221 encode_compound_hdr(xdr, req, &hdr);
2222 encode_sequence(xdr, &args->seq_args, &hdr);
2223 encode_putfh(xdr, args->fh, &hdr);
2224 encode_getfattr(xdr, args->bitmask, &hdr);
2225 encode_nops(&hdr);
2226 }
2227
2228 /*
2229 * Encode a CLOSE request
2230 */
nfs4_xdr_enc_close(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs_closeargs * args)2231 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2232 struct nfs_closeargs *args)
2233 {
2234 struct compound_hdr hdr = {
2235 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2236 };
2237
2238 encode_compound_hdr(xdr, req, &hdr);
2239 encode_sequence(xdr, &args->seq_args, &hdr);
2240 encode_putfh(xdr, args->fh, &hdr);
2241 encode_close(xdr, args, &hdr);
2242 encode_getfattr(xdr, args->bitmask, &hdr);
2243 encode_nops(&hdr);
2244 }
2245
2246 /*
2247 * Encode an OPEN request
2248 */
nfs4_xdr_enc_open(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs_openargs * args)2249 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2250 struct nfs_openargs *args)
2251 {
2252 struct compound_hdr hdr = {
2253 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2254 };
2255
2256 encode_compound_hdr(xdr, req, &hdr);
2257 encode_sequence(xdr, &args->seq_args, &hdr);
2258 encode_putfh(xdr, args->fh, &hdr);
2259 encode_open(xdr, args, &hdr);
2260 encode_getfh(xdr, &hdr);
2261 if (args->access)
2262 encode_access(xdr, args->access, &hdr);
2263 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2264 encode_nops(&hdr);
2265 }
2266
2267 /*
2268 * Encode an OPEN_CONFIRM request
2269 */
nfs4_xdr_enc_open_confirm(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs_open_confirmargs * args)2270 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2271 struct xdr_stream *xdr,
2272 struct nfs_open_confirmargs *args)
2273 {
2274 struct compound_hdr hdr = {
2275 .nops = 0,
2276 };
2277
2278 encode_compound_hdr(xdr, req, &hdr);
2279 encode_putfh(xdr, args->fh, &hdr);
2280 encode_open_confirm(xdr, args, &hdr);
2281 encode_nops(&hdr);
2282 }
2283
2284 /*
2285 * Encode an OPEN request with no attributes.
2286 */
nfs4_xdr_enc_open_noattr(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs_openargs * args)2287 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2288 struct xdr_stream *xdr,
2289 struct nfs_openargs *args)
2290 {
2291 struct compound_hdr hdr = {
2292 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2293 };
2294
2295 encode_compound_hdr(xdr, req, &hdr);
2296 encode_sequence(xdr, &args->seq_args, &hdr);
2297 encode_putfh(xdr, args->fh, &hdr);
2298 encode_open(xdr, args, &hdr);
2299 if (args->access)
2300 encode_access(xdr, args->access, &hdr);
2301 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2302 encode_nops(&hdr);
2303 }
2304
2305 /*
2306 * Encode an OPEN_DOWNGRADE request
2307 */
nfs4_xdr_enc_open_downgrade(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs_closeargs * args)2308 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2309 struct xdr_stream *xdr,
2310 struct nfs_closeargs *args)
2311 {
2312 struct compound_hdr hdr = {
2313 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2314 };
2315
2316 encode_compound_hdr(xdr, req, &hdr);
2317 encode_sequence(xdr, &args->seq_args, &hdr);
2318 encode_putfh(xdr, args->fh, &hdr);
2319 encode_open_downgrade(xdr, args, &hdr);
2320 encode_getfattr(xdr, args->bitmask, &hdr);
2321 encode_nops(&hdr);
2322 }
2323
2324 /*
2325 * Encode a LOCK request
2326 */
nfs4_xdr_enc_lock(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs_lock_args * args)2327 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2328 struct nfs_lock_args *args)
2329 {
2330 struct compound_hdr hdr = {
2331 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2332 };
2333
2334 encode_compound_hdr(xdr, req, &hdr);
2335 encode_sequence(xdr, &args->seq_args, &hdr);
2336 encode_putfh(xdr, args->fh, &hdr);
2337 encode_lock(xdr, args, &hdr);
2338 encode_nops(&hdr);
2339 }
2340
2341 /*
2342 * Encode a LOCKT request
2343 */
nfs4_xdr_enc_lockt(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs_lockt_args * args)2344 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2345 struct nfs_lockt_args *args)
2346 {
2347 struct compound_hdr hdr = {
2348 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2349 };
2350
2351 encode_compound_hdr(xdr, req, &hdr);
2352 encode_sequence(xdr, &args->seq_args, &hdr);
2353 encode_putfh(xdr, args->fh, &hdr);
2354 encode_lockt(xdr, args, &hdr);
2355 encode_nops(&hdr);
2356 }
2357
2358 /*
2359 * Encode a LOCKU request
2360 */
nfs4_xdr_enc_locku(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs_locku_args * args)2361 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2362 struct nfs_locku_args *args)
2363 {
2364 struct compound_hdr hdr = {
2365 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2366 };
2367
2368 encode_compound_hdr(xdr, req, &hdr);
2369 encode_sequence(xdr, &args->seq_args, &hdr);
2370 encode_putfh(xdr, args->fh, &hdr);
2371 encode_locku(xdr, args, &hdr);
2372 encode_nops(&hdr);
2373 }
2374
nfs4_xdr_enc_release_lockowner(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs_release_lockowner_args * args)2375 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2376 struct xdr_stream *xdr,
2377 struct nfs_release_lockowner_args *args)
2378 {
2379 struct compound_hdr hdr = {
2380 .minorversion = 0,
2381 };
2382
2383 encode_compound_hdr(xdr, req, &hdr);
2384 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2385 encode_nops(&hdr);
2386 }
2387
2388 /*
2389 * Encode a READLINK request
2390 */
nfs4_xdr_enc_readlink(struct rpc_rqst * req,struct xdr_stream * xdr,const struct nfs4_readlink * args)2391 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2392 const struct nfs4_readlink *args)
2393 {
2394 struct compound_hdr hdr = {
2395 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2396 };
2397
2398 encode_compound_hdr(xdr, req, &hdr);
2399 encode_sequence(xdr, &args->seq_args, &hdr);
2400 encode_putfh(xdr, args->fh, &hdr);
2401 encode_readlink(xdr, args, req, &hdr);
2402
2403 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2404 args->pgbase, args->pglen);
2405 encode_nops(&hdr);
2406 }
2407
2408 /*
2409 * Encode a READDIR request
2410 */
nfs4_xdr_enc_readdir(struct rpc_rqst * req,struct xdr_stream * xdr,const struct nfs4_readdir_arg * args)2411 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2412 const struct nfs4_readdir_arg *args)
2413 {
2414 struct compound_hdr hdr = {
2415 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2416 };
2417
2418 encode_compound_hdr(xdr, req, &hdr);
2419 encode_sequence(xdr, &args->seq_args, &hdr);
2420 encode_putfh(xdr, args->fh, &hdr);
2421 encode_readdir(xdr, args, req, &hdr);
2422
2423 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2424 args->pgbase, args->count);
2425 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2426 __func__, hdr.replen << 2, args->pages,
2427 args->pgbase, args->count);
2428 encode_nops(&hdr);
2429 }
2430
2431 /*
2432 * Encode a READ request
2433 */
nfs4_xdr_enc_read(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs_pgio_args * args)2434 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2435 struct nfs_pgio_args *args)
2436 {
2437 struct compound_hdr hdr = {
2438 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2439 };
2440
2441 encode_compound_hdr(xdr, req, &hdr);
2442 encode_sequence(xdr, &args->seq_args, &hdr);
2443 encode_putfh(xdr, args->fh, &hdr);
2444 encode_read(xdr, args, &hdr);
2445
2446 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2447 args->pages, args->pgbase, args->count);
2448 req->rq_rcv_buf.flags |= XDRBUF_READ;
2449 encode_nops(&hdr);
2450 }
2451
2452 /*
2453 * Encode an SETATTR request
2454 */
nfs4_xdr_enc_setattr(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs_setattrargs * args)2455 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2456 struct nfs_setattrargs *args)
2457 {
2458 struct compound_hdr hdr = {
2459 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2460 };
2461
2462 encode_compound_hdr(xdr, req, &hdr);
2463 encode_sequence(xdr, &args->seq_args, &hdr);
2464 encode_putfh(xdr, args->fh, &hdr);
2465 encode_setattr(xdr, args, args->server, &hdr);
2466 encode_getfattr(xdr, args->bitmask, &hdr);
2467 encode_nops(&hdr);
2468 }
2469
2470 /*
2471 * Encode a GETACL request
2472 */
nfs4_xdr_enc_getacl(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs_getaclargs * args)2473 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2474 struct nfs_getaclargs *args)
2475 {
2476 struct compound_hdr hdr = {
2477 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2478 };
2479 uint32_t replen;
2480
2481 encode_compound_hdr(xdr, req, &hdr);
2482 encode_sequence(xdr, &args->seq_args, &hdr);
2483 encode_putfh(xdr, args->fh, &hdr);
2484 replen = hdr.replen + op_decode_hdr_maxsz + 1;
2485 encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2486
2487 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2488 args->acl_pages, args->acl_pgbase, args->acl_len);
2489
2490 encode_nops(&hdr);
2491 }
2492
2493 /*
2494 * Encode a WRITE request
2495 */
nfs4_xdr_enc_write(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs_pgio_args * args)2496 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2497 struct nfs_pgio_args *args)
2498 {
2499 struct compound_hdr hdr = {
2500 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2501 };
2502
2503 encode_compound_hdr(xdr, req, &hdr);
2504 encode_sequence(xdr, &args->seq_args, &hdr);
2505 encode_putfh(xdr, args->fh, &hdr);
2506 encode_write(xdr, args, &hdr);
2507 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2508 if (args->bitmask)
2509 encode_getfattr(xdr, args->bitmask, &hdr);
2510 encode_nops(&hdr);
2511 }
2512
2513 /*
2514 * a COMMIT request
2515 */
nfs4_xdr_enc_commit(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs_commitargs * args)2516 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2517 struct nfs_commitargs *args)
2518 {
2519 struct compound_hdr hdr = {
2520 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2521 };
2522
2523 encode_compound_hdr(xdr, req, &hdr);
2524 encode_sequence(xdr, &args->seq_args, &hdr);
2525 encode_putfh(xdr, args->fh, &hdr);
2526 encode_commit(xdr, args, &hdr);
2527 encode_nops(&hdr);
2528 }
2529
2530 /*
2531 * FSINFO request
2532 */
nfs4_xdr_enc_fsinfo(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs4_fsinfo_arg * args)2533 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2534 struct nfs4_fsinfo_arg *args)
2535 {
2536 struct compound_hdr hdr = {
2537 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2538 };
2539
2540 encode_compound_hdr(xdr, req, &hdr);
2541 encode_sequence(xdr, &args->seq_args, &hdr);
2542 encode_putfh(xdr, args->fh, &hdr);
2543 encode_fsinfo(xdr, args->bitmask, &hdr);
2544 encode_nops(&hdr);
2545 }
2546
2547 /*
2548 * a PATHCONF request
2549 */
nfs4_xdr_enc_pathconf(struct rpc_rqst * req,struct xdr_stream * xdr,const struct nfs4_pathconf_arg * args)2550 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2551 const struct nfs4_pathconf_arg *args)
2552 {
2553 struct compound_hdr hdr = {
2554 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2555 };
2556
2557 encode_compound_hdr(xdr, req, &hdr);
2558 encode_sequence(xdr, &args->seq_args, &hdr);
2559 encode_putfh(xdr, args->fh, &hdr);
2560 encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2561 &hdr);
2562 encode_nops(&hdr);
2563 }
2564
2565 /*
2566 * a STATFS request
2567 */
nfs4_xdr_enc_statfs(struct rpc_rqst * req,struct xdr_stream * xdr,const struct nfs4_statfs_arg * args)2568 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2569 const struct nfs4_statfs_arg *args)
2570 {
2571 struct compound_hdr hdr = {
2572 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2573 };
2574
2575 encode_compound_hdr(xdr, req, &hdr);
2576 encode_sequence(xdr, &args->seq_args, &hdr);
2577 encode_putfh(xdr, args->fh, &hdr);
2578 encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2579 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2580 encode_nops(&hdr);
2581 }
2582
2583 /*
2584 * GETATTR_BITMAP request
2585 */
nfs4_xdr_enc_server_caps(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs4_server_caps_arg * args)2586 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2587 struct xdr_stream *xdr,
2588 struct nfs4_server_caps_arg *args)
2589 {
2590 struct compound_hdr hdr = {
2591 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2592 };
2593
2594 encode_compound_hdr(xdr, req, &hdr);
2595 encode_sequence(xdr, &args->seq_args, &hdr);
2596 encode_putfh(xdr, args->fhandle, &hdr);
2597 encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2598 FATTR4_WORD0_FH_EXPIRE_TYPE|
2599 FATTR4_WORD0_LINK_SUPPORT|
2600 FATTR4_WORD0_SYMLINK_SUPPORT|
2601 FATTR4_WORD0_ACLSUPPORT, &hdr);
2602 encode_nops(&hdr);
2603 }
2604
2605 /*
2606 * a RENEW request
2607 */
nfs4_xdr_enc_renew(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs_client * clp)2608 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2609 struct nfs_client *clp)
2610 {
2611 struct compound_hdr hdr = {
2612 .nops = 0,
2613 };
2614
2615 encode_compound_hdr(xdr, req, &hdr);
2616 encode_renew(xdr, clp->cl_clientid, &hdr);
2617 encode_nops(&hdr);
2618 }
2619
2620 /*
2621 * a SETCLIENTID request
2622 */
nfs4_xdr_enc_setclientid(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs4_setclientid * sc)2623 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2624 struct xdr_stream *xdr,
2625 struct nfs4_setclientid *sc)
2626 {
2627 struct compound_hdr hdr = {
2628 .nops = 0,
2629 };
2630
2631 encode_compound_hdr(xdr, req, &hdr);
2632 encode_setclientid(xdr, sc, &hdr);
2633 encode_nops(&hdr);
2634 }
2635
2636 /*
2637 * a SETCLIENTID_CONFIRM request
2638 */
nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs4_setclientid_res * arg)2639 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2640 struct xdr_stream *xdr,
2641 struct nfs4_setclientid_res *arg)
2642 {
2643 struct compound_hdr hdr = {
2644 .nops = 0,
2645 };
2646
2647 encode_compound_hdr(xdr, req, &hdr);
2648 encode_setclientid_confirm(xdr, arg, &hdr);
2649 encode_nops(&hdr);
2650 }
2651
2652 /*
2653 * DELEGRETURN request
2654 */
nfs4_xdr_enc_delegreturn(struct rpc_rqst * req,struct xdr_stream * xdr,const struct nfs4_delegreturnargs * args)2655 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2656 struct xdr_stream *xdr,
2657 const struct nfs4_delegreturnargs *args)
2658 {
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->fhandle, &hdr);
2666 encode_getfattr(xdr, args->bitmask, &hdr);
2667 encode_delegreturn(xdr, args->stateid, &hdr);
2668 encode_nops(&hdr);
2669 }
2670
2671 /*
2672 * Encode FS_LOCATIONS request
2673 */
nfs4_xdr_enc_fs_locations(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs4_fs_locations_arg * args)2674 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2675 struct xdr_stream *xdr,
2676 struct nfs4_fs_locations_arg *args)
2677 {
2678 struct compound_hdr hdr = {
2679 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2680 };
2681 uint32_t replen;
2682
2683 encode_compound_hdr(xdr, req, &hdr);
2684 encode_sequence(xdr, &args->seq_args, &hdr);
2685 if (args->migration) {
2686 encode_putfh(xdr, args->fh, &hdr);
2687 replen = hdr.replen;
2688 encode_fs_locations(xdr, args->bitmask, &hdr);
2689 if (args->renew)
2690 encode_renew(xdr, args->clientid, &hdr);
2691 } else {
2692 encode_putfh(xdr, args->dir_fh, &hdr);
2693 encode_lookup(xdr, args->name, &hdr);
2694 replen = hdr.replen;
2695 encode_fs_locations(xdr, args->bitmask, &hdr);
2696 }
2697
2698 /* Set up reply kvec to capture returned fs_locations array. */
2699 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2700 0, PAGE_SIZE);
2701 encode_nops(&hdr);
2702 }
2703
2704 /*
2705 * Encode SECINFO request
2706 */
nfs4_xdr_enc_secinfo(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs4_secinfo_arg * args)2707 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2708 struct xdr_stream *xdr,
2709 struct nfs4_secinfo_arg *args)
2710 {
2711 struct compound_hdr hdr = {
2712 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2713 };
2714
2715 encode_compound_hdr(xdr, req, &hdr);
2716 encode_sequence(xdr, &args->seq_args, &hdr);
2717 encode_putfh(xdr, args->dir_fh, &hdr);
2718 encode_secinfo(xdr, args->name, &hdr);
2719 encode_nops(&hdr);
2720 }
2721
2722 /*
2723 * Encode FSID_PRESENT request
2724 */
nfs4_xdr_enc_fsid_present(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs4_fsid_present_arg * args)2725 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2726 struct xdr_stream *xdr,
2727 struct nfs4_fsid_present_arg *args)
2728 {
2729 struct compound_hdr hdr = {
2730 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2731 };
2732
2733 encode_compound_hdr(xdr, req, &hdr);
2734 encode_sequence(xdr, &args->seq_args, &hdr);
2735 encode_putfh(xdr, args->fh, &hdr);
2736 encode_getfh(xdr, &hdr);
2737 if (args->renew)
2738 encode_renew(xdr, args->clientid, &hdr);
2739 encode_nops(&hdr);
2740 }
2741
2742 #if defined(CONFIG_NFS_V4_1)
2743 /*
2744 * BIND_CONN_TO_SESSION request
2745 */
nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs_client * clp)2746 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2747 struct xdr_stream *xdr,
2748 struct nfs_client *clp)
2749 {
2750 struct compound_hdr hdr = {
2751 .minorversion = clp->cl_mvops->minor_version,
2752 };
2753
2754 encode_compound_hdr(xdr, req, &hdr);
2755 encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);
2756 encode_nops(&hdr);
2757 }
2758
2759 /*
2760 * EXCHANGE_ID request
2761 */
nfs4_xdr_enc_exchange_id(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs41_exchange_id_args * args)2762 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2763 struct xdr_stream *xdr,
2764 struct nfs41_exchange_id_args *args)
2765 {
2766 struct compound_hdr hdr = {
2767 .minorversion = args->client->cl_mvops->minor_version,
2768 };
2769
2770 encode_compound_hdr(xdr, req, &hdr);
2771 encode_exchange_id(xdr, args, &hdr);
2772 encode_nops(&hdr);
2773 }
2774
2775 /*
2776 * a CREATE_SESSION request
2777 */
nfs4_xdr_enc_create_session(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs41_create_session_args * args)2778 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2779 struct xdr_stream *xdr,
2780 struct nfs41_create_session_args *args)
2781 {
2782 struct compound_hdr hdr = {
2783 .minorversion = args->client->cl_mvops->minor_version,
2784 };
2785
2786 encode_compound_hdr(xdr, req, &hdr);
2787 encode_create_session(xdr, args, &hdr);
2788 encode_nops(&hdr);
2789 }
2790
2791 /*
2792 * a DESTROY_SESSION request
2793 */
nfs4_xdr_enc_destroy_session(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs4_session * session)2794 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2795 struct xdr_stream *xdr,
2796 struct nfs4_session *session)
2797 {
2798 struct compound_hdr hdr = {
2799 .minorversion = session->clp->cl_mvops->minor_version,
2800 };
2801
2802 encode_compound_hdr(xdr, req, &hdr);
2803 encode_destroy_session(xdr, session, &hdr);
2804 encode_nops(&hdr);
2805 }
2806
2807 /*
2808 * a DESTROY_CLIENTID request
2809 */
nfs4_xdr_enc_destroy_clientid(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs_client * clp)2810 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2811 struct xdr_stream *xdr,
2812 struct nfs_client *clp)
2813 {
2814 struct compound_hdr hdr = {
2815 .minorversion = clp->cl_mvops->minor_version,
2816 };
2817
2818 encode_compound_hdr(xdr, req, &hdr);
2819 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2820 encode_nops(&hdr);
2821 }
2822
2823 /*
2824 * a SEQUENCE request
2825 */
nfs4_xdr_enc_sequence(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs4_sequence_args * args)2826 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2827 struct nfs4_sequence_args *args)
2828 {
2829 struct compound_hdr hdr = {
2830 .minorversion = nfs4_xdr_minorversion(args),
2831 };
2832
2833 encode_compound_hdr(xdr, req, &hdr);
2834 encode_sequence(xdr, args, &hdr);
2835 encode_nops(&hdr);
2836 }
2837
2838 /*
2839 * a GET_LEASE_TIME request
2840 */
nfs4_xdr_enc_get_lease_time(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs4_get_lease_time_args * args)2841 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2842 struct xdr_stream *xdr,
2843 struct nfs4_get_lease_time_args *args)
2844 {
2845 struct compound_hdr hdr = {
2846 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2847 };
2848 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2849
2850 encode_compound_hdr(xdr, req, &hdr);
2851 encode_sequence(xdr, &args->la_seq_args, &hdr);
2852 encode_putrootfh(xdr, &hdr);
2853 encode_fsinfo(xdr, lease_bitmap, &hdr);
2854 encode_nops(&hdr);
2855 }
2856
2857 /*
2858 * a RECLAIM_COMPLETE request
2859 */
nfs4_xdr_enc_reclaim_complete(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs41_reclaim_complete_args * args)2860 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2861 struct xdr_stream *xdr,
2862 struct nfs41_reclaim_complete_args *args)
2863 {
2864 struct compound_hdr hdr = {
2865 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2866 };
2867
2868 encode_compound_hdr(xdr, req, &hdr);
2869 encode_sequence(xdr, &args->seq_args, &hdr);
2870 encode_reclaim_complete(xdr, args, &hdr);
2871 encode_nops(&hdr);
2872 }
2873
2874 /*
2875 * Encode GETDEVICEINFO request
2876 */
nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs4_getdeviceinfo_args * args)2877 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2878 struct xdr_stream *xdr,
2879 struct nfs4_getdeviceinfo_args *args)
2880 {
2881 struct compound_hdr hdr = {
2882 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2883 };
2884
2885 encode_compound_hdr(xdr, req, &hdr);
2886 encode_sequence(xdr, &args->seq_args, &hdr);
2887 encode_getdeviceinfo(xdr, args, &hdr);
2888
2889 /* set up reply kvec. Subtract notification bitmap max size (2)
2890 * so that notification bitmap is put in xdr_buf tail */
2891 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2892 args->pdev->pages, args->pdev->pgbase,
2893 args->pdev->pglen);
2894
2895 encode_nops(&hdr);
2896 }
2897
2898 /*
2899 * Encode LAYOUTGET request
2900 */
nfs4_xdr_enc_layoutget(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs4_layoutget_args * args)2901 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2902 struct xdr_stream *xdr,
2903 struct nfs4_layoutget_args *args)
2904 {
2905 struct compound_hdr hdr = {
2906 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2907 };
2908
2909 encode_compound_hdr(xdr, req, &hdr);
2910 encode_sequence(xdr, &args->seq_args, &hdr);
2911 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2912 encode_layoutget(xdr, args, &hdr);
2913
2914 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2915 args->layout.pages, 0, args->layout.pglen);
2916
2917 encode_nops(&hdr);
2918 }
2919
2920 /*
2921 * Encode LAYOUTCOMMIT request
2922 */
nfs4_xdr_enc_layoutcommit(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs4_layoutcommit_args * args)2923 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2924 struct xdr_stream *xdr,
2925 struct nfs4_layoutcommit_args *args)
2926 {
2927 struct nfs4_layoutcommit_data *data =
2928 container_of(args, struct nfs4_layoutcommit_data, args);
2929 struct compound_hdr hdr = {
2930 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2931 };
2932
2933 encode_compound_hdr(xdr, req, &hdr);
2934 encode_sequence(xdr, &args->seq_args, &hdr);
2935 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2936 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2937 encode_getfattr(xdr, args->bitmask, &hdr);
2938 encode_nops(&hdr);
2939 }
2940
2941 /*
2942 * Encode LAYOUTRETURN request
2943 */
nfs4_xdr_enc_layoutreturn(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs4_layoutreturn_args * args)2944 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2945 struct xdr_stream *xdr,
2946 struct nfs4_layoutreturn_args *args)
2947 {
2948 struct compound_hdr hdr = {
2949 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2950 };
2951
2952 encode_compound_hdr(xdr, req, &hdr);
2953 encode_sequence(xdr, &args->seq_args, &hdr);
2954 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2955 encode_layoutreturn(xdr, args, &hdr);
2956 encode_nops(&hdr);
2957 }
2958
2959 /*
2960 * Encode SECINFO_NO_NAME request
2961 */
nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs41_secinfo_no_name_args * args)2962 static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
2963 struct xdr_stream *xdr,
2964 struct nfs41_secinfo_no_name_args *args)
2965 {
2966 struct compound_hdr hdr = {
2967 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2968 };
2969
2970 encode_compound_hdr(xdr, req, &hdr);
2971 encode_sequence(xdr, &args->seq_args, &hdr);
2972 encode_putrootfh(xdr, &hdr);
2973 encode_secinfo_no_name(xdr, args, &hdr);
2974 encode_nops(&hdr);
2975 return 0;
2976 }
2977
2978 /*
2979 * Encode TEST_STATEID request
2980 */
nfs4_xdr_enc_test_stateid(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs41_test_stateid_args * args)2981 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
2982 struct xdr_stream *xdr,
2983 struct nfs41_test_stateid_args *args)
2984 {
2985 struct compound_hdr hdr = {
2986 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2987 };
2988
2989 encode_compound_hdr(xdr, req, &hdr);
2990 encode_sequence(xdr, &args->seq_args, &hdr);
2991 encode_test_stateid(xdr, args, &hdr);
2992 encode_nops(&hdr);
2993 }
2994
2995 /*
2996 * Encode FREE_STATEID request
2997 */
nfs4_xdr_enc_free_stateid(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs41_free_stateid_args * args)2998 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
2999 struct xdr_stream *xdr,
3000 struct nfs41_free_stateid_args *args)
3001 {
3002 struct compound_hdr hdr = {
3003 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3004 };
3005
3006 encode_compound_hdr(xdr, req, &hdr);
3007 encode_sequence(xdr, &args->seq_args, &hdr);
3008 encode_free_stateid(xdr, args, &hdr);
3009 encode_nops(&hdr);
3010 }
3011 #endif /* CONFIG_NFS_V4_1 */
3012
print_overflow_msg(const char * func,const struct xdr_stream * xdr)3013 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3014 {
3015 dprintk("nfs: %s: prematurely hit end of receive buffer. "
3016 "Remaining buffer length is %tu words.\n",
3017 func, xdr->end - xdr->p);
3018 }
3019
decode_opaque_inline(struct xdr_stream * xdr,unsigned int * len,char ** string)3020 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3021 {
3022 __be32 *p;
3023
3024 p = xdr_inline_decode(xdr, 4);
3025 if (unlikely(!p))
3026 goto out_overflow;
3027 *len = be32_to_cpup(p);
3028 p = xdr_inline_decode(xdr, *len);
3029 if (unlikely(!p))
3030 goto out_overflow;
3031 *string = (char *)p;
3032 return 0;
3033 out_overflow:
3034 print_overflow_msg(__func__, xdr);
3035 return -EIO;
3036 }
3037
decode_compound_hdr(struct xdr_stream * xdr,struct compound_hdr * hdr)3038 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3039 {
3040 __be32 *p;
3041
3042 p = xdr_inline_decode(xdr, 8);
3043 if (unlikely(!p))
3044 goto out_overflow;
3045 hdr->status = be32_to_cpup(p++);
3046 hdr->taglen = be32_to_cpup(p);
3047
3048 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3049 if (unlikely(!p))
3050 goto out_overflow;
3051 hdr->tag = (char *)p;
3052 p += XDR_QUADLEN(hdr->taglen);
3053 hdr->nops = be32_to_cpup(p);
3054 if (unlikely(hdr->nops < 1))
3055 return nfs4_stat_to_errno(hdr->status);
3056 return 0;
3057 out_overflow:
3058 print_overflow_msg(__func__, xdr);
3059 return -EIO;
3060 }
3061
__decode_op_hdr(struct xdr_stream * xdr,enum nfs_opnum4 expected,int * nfs_retval)3062 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3063 int *nfs_retval)
3064 {
3065 __be32 *p;
3066 uint32_t opnum;
3067 int32_t nfserr;
3068
3069 p = xdr_inline_decode(xdr, 8);
3070 if (unlikely(!p))
3071 goto out_overflow;
3072 opnum = be32_to_cpup(p++);
3073 if (unlikely(opnum != expected))
3074 goto out_bad_operation;
3075 nfserr = be32_to_cpup(p);
3076 if (nfserr == NFS_OK)
3077 *nfs_retval = 0;
3078 else
3079 *nfs_retval = nfs4_stat_to_errno(nfserr);
3080 return true;
3081 out_bad_operation:
3082 dprintk("nfs: Server returned operation"
3083 " %d but we issued a request for %d\n",
3084 opnum, expected);
3085 *nfs_retval = -EREMOTEIO;
3086 return false;
3087 out_overflow:
3088 print_overflow_msg(__func__, xdr);
3089 *nfs_retval = -EIO;
3090 return false;
3091 }
3092
decode_op_hdr(struct xdr_stream * xdr,enum nfs_opnum4 expected)3093 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3094 {
3095 int retval;
3096
3097 __decode_op_hdr(xdr, expected, &retval);
3098 return retval;
3099 }
3100
3101 /* Dummy routine */
decode_ace(struct xdr_stream * xdr,void * ace,struct nfs_client * clp)3102 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3103 {
3104 __be32 *p;
3105 unsigned int strlen;
3106 char *str;
3107
3108 p = xdr_inline_decode(xdr, 12);
3109 if (likely(p))
3110 return decode_opaque_inline(xdr, &strlen, &str);
3111 print_overflow_msg(__func__, xdr);
3112 return -EIO;
3113 }
3114
decode_attr_bitmap(struct xdr_stream * xdr,uint32_t * bitmap)3115 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3116 {
3117 uint32_t bmlen;
3118 __be32 *p;
3119
3120 p = xdr_inline_decode(xdr, 4);
3121 if (unlikely(!p))
3122 goto out_overflow;
3123 bmlen = be32_to_cpup(p);
3124
3125 bitmap[0] = bitmap[1] = bitmap[2] = 0;
3126 p = xdr_inline_decode(xdr, (bmlen << 2));
3127 if (unlikely(!p))
3128 goto out_overflow;
3129 if (bmlen > 0) {
3130 bitmap[0] = be32_to_cpup(p++);
3131 if (bmlen > 1) {
3132 bitmap[1] = be32_to_cpup(p++);
3133 if (bmlen > 2)
3134 bitmap[2] = be32_to_cpup(p);
3135 }
3136 }
3137 return 0;
3138 out_overflow:
3139 print_overflow_msg(__func__, xdr);
3140 return -EIO;
3141 }
3142
decode_attr_length(struct xdr_stream * xdr,uint32_t * attrlen,unsigned int * savep)3143 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3144 {
3145 __be32 *p;
3146
3147 p = xdr_inline_decode(xdr, 4);
3148 if (unlikely(!p))
3149 goto out_overflow;
3150 *attrlen = be32_to_cpup(p);
3151 *savep = xdr_stream_pos(xdr);
3152 return 0;
3153 out_overflow:
3154 print_overflow_msg(__func__, xdr);
3155 return -EIO;
3156 }
3157
decode_attr_supported(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * bitmask)3158 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3159 {
3160 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3161 int ret;
3162 ret = decode_attr_bitmap(xdr, bitmask);
3163 if (unlikely(ret < 0))
3164 return ret;
3165 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3166 } else
3167 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3168 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3169 bitmask[0], bitmask[1], bitmask[2]);
3170 return 0;
3171 }
3172
decode_attr_type(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * type)3173 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3174 {
3175 __be32 *p;
3176 int ret = 0;
3177
3178 *type = 0;
3179 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3180 return -EIO;
3181 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3182 p = xdr_inline_decode(xdr, 4);
3183 if (unlikely(!p))
3184 goto out_overflow;
3185 *type = be32_to_cpup(p);
3186 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3187 dprintk("%s: bad type %d\n", __func__, *type);
3188 return -EIO;
3189 }
3190 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3191 ret = NFS_ATTR_FATTR_TYPE;
3192 }
3193 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3194 return ret;
3195 out_overflow:
3196 print_overflow_msg(__func__, xdr);
3197 return -EIO;
3198 }
3199
decode_attr_fh_expire_type(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * type)3200 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3201 uint32_t *bitmap, uint32_t *type)
3202 {
3203 __be32 *p;
3204
3205 *type = 0;
3206 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3207 return -EIO;
3208 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3209 p = xdr_inline_decode(xdr, 4);
3210 if (unlikely(!p))
3211 goto out_overflow;
3212 *type = be32_to_cpup(p);
3213 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3214 }
3215 dprintk("%s: expire type=0x%x\n", __func__, *type);
3216 return 0;
3217 out_overflow:
3218 print_overflow_msg(__func__, xdr);
3219 return -EIO;
3220 }
3221
decode_attr_change(struct xdr_stream * xdr,uint32_t * bitmap,uint64_t * change)3222 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3223 {
3224 __be32 *p;
3225 int ret = 0;
3226
3227 *change = 0;
3228 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3229 return -EIO;
3230 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3231 p = xdr_inline_decode(xdr, 8);
3232 if (unlikely(!p))
3233 goto out_overflow;
3234 xdr_decode_hyper(p, change);
3235 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3236 ret = NFS_ATTR_FATTR_CHANGE;
3237 }
3238 dprintk("%s: change attribute=%Lu\n", __func__,
3239 (unsigned long long)*change);
3240 return ret;
3241 out_overflow:
3242 print_overflow_msg(__func__, xdr);
3243 return -EIO;
3244 }
3245
decode_attr_size(struct xdr_stream * xdr,uint32_t * bitmap,uint64_t * size)3246 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3247 {
3248 __be32 *p;
3249 int ret = 0;
3250
3251 *size = 0;
3252 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3253 return -EIO;
3254 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3255 p = xdr_inline_decode(xdr, 8);
3256 if (unlikely(!p))
3257 goto out_overflow;
3258 xdr_decode_hyper(p, size);
3259 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3260 ret = NFS_ATTR_FATTR_SIZE;
3261 }
3262 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3263 return ret;
3264 out_overflow:
3265 print_overflow_msg(__func__, xdr);
3266 return -EIO;
3267 }
3268
decode_attr_link_support(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * res)3269 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3270 {
3271 __be32 *p;
3272
3273 *res = 0;
3274 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3275 return -EIO;
3276 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3277 p = xdr_inline_decode(xdr, 4);
3278 if (unlikely(!p))
3279 goto out_overflow;
3280 *res = be32_to_cpup(p);
3281 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3282 }
3283 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3284 return 0;
3285 out_overflow:
3286 print_overflow_msg(__func__, xdr);
3287 return -EIO;
3288 }
3289
decode_attr_symlink_support(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * res)3290 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3291 {
3292 __be32 *p;
3293
3294 *res = 0;
3295 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3296 return -EIO;
3297 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3298 p = xdr_inline_decode(xdr, 4);
3299 if (unlikely(!p))
3300 goto out_overflow;
3301 *res = be32_to_cpup(p);
3302 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3303 }
3304 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3305 return 0;
3306 out_overflow:
3307 print_overflow_msg(__func__, xdr);
3308 return -EIO;
3309 }
3310
decode_attr_fsid(struct xdr_stream * xdr,uint32_t * bitmap,struct nfs_fsid * fsid)3311 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3312 {
3313 __be32 *p;
3314 int ret = 0;
3315
3316 fsid->major = 0;
3317 fsid->minor = 0;
3318 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3319 return -EIO;
3320 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3321 p = xdr_inline_decode(xdr, 16);
3322 if (unlikely(!p))
3323 goto out_overflow;
3324 p = xdr_decode_hyper(p, &fsid->major);
3325 xdr_decode_hyper(p, &fsid->minor);
3326 bitmap[0] &= ~FATTR4_WORD0_FSID;
3327 ret = NFS_ATTR_FATTR_FSID;
3328 }
3329 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3330 (unsigned long long)fsid->major,
3331 (unsigned long long)fsid->minor);
3332 return ret;
3333 out_overflow:
3334 print_overflow_msg(__func__, xdr);
3335 return -EIO;
3336 }
3337
decode_attr_lease_time(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * res)3338 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3339 {
3340 __be32 *p;
3341
3342 *res = 60;
3343 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3344 return -EIO;
3345 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3346 p = xdr_inline_decode(xdr, 4);
3347 if (unlikely(!p))
3348 goto out_overflow;
3349 *res = be32_to_cpup(p);
3350 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3351 }
3352 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3353 return 0;
3354 out_overflow:
3355 print_overflow_msg(__func__, xdr);
3356 return -EIO;
3357 }
3358
decode_attr_error(struct xdr_stream * xdr,uint32_t * bitmap,int32_t * res)3359 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3360 {
3361 __be32 *p;
3362
3363 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3364 return -EIO;
3365 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3366 p = xdr_inline_decode(xdr, 4);
3367 if (unlikely(!p))
3368 goto out_overflow;
3369 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3370 *res = -be32_to_cpup(p);
3371 }
3372 return 0;
3373 out_overflow:
3374 print_overflow_msg(__func__, xdr);
3375 return -EIO;
3376 }
3377
decode_attr_filehandle(struct xdr_stream * xdr,uint32_t * bitmap,struct nfs_fh * fh)3378 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3379 {
3380 __be32 *p;
3381 int len;
3382
3383 if (fh != NULL)
3384 memset(fh, 0, sizeof(*fh));
3385
3386 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3387 return -EIO;
3388 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3389 p = xdr_inline_decode(xdr, 4);
3390 if (unlikely(!p))
3391 goto out_overflow;
3392 len = be32_to_cpup(p);
3393 if (len > NFS4_FHSIZE)
3394 return -EIO;
3395 p = xdr_inline_decode(xdr, len);
3396 if (unlikely(!p))
3397 goto out_overflow;
3398 if (fh != NULL) {
3399 memcpy(fh->data, p, len);
3400 fh->size = len;
3401 }
3402 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3403 }
3404 return 0;
3405 out_overflow:
3406 print_overflow_msg(__func__, xdr);
3407 return -EIO;
3408 }
3409
decode_attr_aclsupport(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * res)3410 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3411 {
3412 __be32 *p;
3413
3414 *res = 0;
3415 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3416 return -EIO;
3417 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3418 p = xdr_inline_decode(xdr, 4);
3419 if (unlikely(!p))
3420 goto out_overflow;
3421 *res = be32_to_cpup(p);
3422 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3423 }
3424 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3425 return 0;
3426 out_overflow:
3427 print_overflow_msg(__func__, xdr);
3428 return -EIO;
3429 }
3430
decode_attr_fileid(struct xdr_stream * xdr,uint32_t * bitmap,uint64_t * fileid)3431 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3432 {
3433 __be32 *p;
3434 int ret = 0;
3435
3436 *fileid = 0;
3437 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3438 return -EIO;
3439 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3440 p = xdr_inline_decode(xdr, 8);
3441 if (unlikely(!p))
3442 goto out_overflow;
3443 xdr_decode_hyper(p, fileid);
3444 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3445 ret = NFS_ATTR_FATTR_FILEID;
3446 }
3447 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3448 return ret;
3449 out_overflow:
3450 print_overflow_msg(__func__, xdr);
3451 return -EIO;
3452 }
3453
decode_attr_mounted_on_fileid(struct xdr_stream * xdr,uint32_t * bitmap,uint64_t * fileid)3454 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3455 {
3456 __be32 *p;
3457 int ret = 0;
3458
3459 *fileid = 0;
3460 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3461 return -EIO;
3462 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3463 p = xdr_inline_decode(xdr, 8);
3464 if (unlikely(!p))
3465 goto out_overflow;
3466 xdr_decode_hyper(p, fileid);
3467 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3468 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3469 }
3470 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3471 return ret;
3472 out_overflow:
3473 print_overflow_msg(__func__, xdr);
3474 return -EIO;
3475 }
3476
decode_attr_files_avail(struct xdr_stream * xdr,uint32_t * bitmap,uint64_t * res)3477 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3478 {
3479 __be32 *p;
3480 int status = 0;
3481
3482 *res = 0;
3483 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3484 return -EIO;
3485 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3486 p = xdr_inline_decode(xdr, 8);
3487 if (unlikely(!p))
3488 goto out_overflow;
3489 xdr_decode_hyper(p, res);
3490 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3491 }
3492 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3493 return status;
3494 out_overflow:
3495 print_overflow_msg(__func__, xdr);
3496 return -EIO;
3497 }
3498
decode_attr_files_free(struct xdr_stream * xdr,uint32_t * bitmap,uint64_t * res)3499 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3500 {
3501 __be32 *p;
3502 int status = 0;
3503
3504 *res = 0;
3505 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3506 return -EIO;
3507 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3508 p = xdr_inline_decode(xdr, 8);
3509 if (unlikely(!p))
3510 goto out_overflow;
3511 xdr_decode_hyper(p, res);
3512 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3513 }
3514 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3515 return status;
3516 out_overflow:
3517 print_overflow_msg(__func__, xdr);
3518 return -EIO;
3519 }
3520
decode_attr_files_total(struct xdr_stream * xdr,uint32_t * bitmap,uint64_t * res)3521 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3522 {
3523 __be32 *p;
3524 int status = 0;
3525
3526 *res = 0;
3527 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3528 return -EIO;
3529 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3530 p = xdr_inline_decode(xdr, 8);
3531 if (unlikely(!p))
3532 goto out_overflow;
3533 xdr_decode_hyper(p, res);
3534 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3535 }
3536 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3537 return status;
3538 out_overflow:
3539 print_overflow_msg(__func__, xdr);
3540 return -EIO;
3541 }
3542
decode_pathname(struct xdr_stream * xdr,struct nfs4_pathname * path)3543 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3544 {
3545 u32 n;
3546 __be32 *p;
3547 int status = 0;
3548
3549 p = xdr_inline_decode(xdr, 4);
3550 if (unlikely(!p))
3551 goto out_overflow;
3552 n = be32_to_cpup(p);
3553 if (n == 0)
3554 goto root_path;
3555 dprintk("pathname4: ");
3556 if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3557 dprintk("cannot parse %d components in path\n", n);
3558 goto out_eio;
3559 }
3560 for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3561 struct nfs4_string *component = &path->components[path->ncomponents];
3562 status = decode_opaque_inline(xdr, &component->len, &component->data);
3563 if (unlikely(status != 0))
3564 goto out_eio;
3565 ifdebug (XDR)
3566 pr_cont("%s%.*s ",
3567 (path->ncomponents != n ? "/ " : ""),
3568 component->len, component->data);
3569 }
3570 out:
3571 return status;
3572 root_path:
3573 /* a root pathname is sent as a zero component4 */
3574 path->ncomponents = 1;
3575 path->components[0].len=0;
3576 path->components[0].data=NULL;
3577 dprintk("pathname4: /\n");
3578 goto out;
3579 out_eio:
3580 dprintk(" status %d", status);
3581 status = -EIO;
3582 goto out;
3583 out_overflow:
3584 print_overflow_msg(__func__, xdr);
3585 return -EIO;
3586 }
3587
decode_attr_fs_locations(struct xdr_stream * xdr,uint32_t * bitmap,struct nfs4_fs_locations * res)3588 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3589 {
3590 int n;
3591 __be32 *p;
3592 int status = -EIO;
3593
3594 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3595 goto out;
3596 status = 0;
3597 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3598 goto out;
3599 status = -EIO;
3600 /* Ignore borken servers that return unrequested attrs */
3601 if (unlikely(res == NULL))
3602 goto out;
3603 dprintk("%s: fsroot:\n", __func__);
3604 status = decode_pathname(xdr, &res->fs_path);
3605 if (unlikely(status != 0))
3606 goto out;
3607 p = xdr_inline_decode(xdr, 4);
3608 if (unlikely(!p))
3609 goto out_overflow;
3610 n = be32_to_cpup(p);
3611 if (n <= 0)
3612 goto out_eio;
3613 for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3614 u32 m;
3615 struct nfs4_fs_location *loc;
3616
3617 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3618 break;
3619 loc = &res->locations[res->nlocations];
3620 p = xdr_inline_decode(xdr, 4);
3621 if (unlikely(!p))
3622 goto out_overflow;
3623 m = be32_to_cpup(p);
3624
3625 dprintk("%s: servers:\n", __func__);
3626 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3627 struct nfs4_string *server;
3628
3629 if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3630 unsigned int i;
3631 dprintk("%s: using first %u of %u servers "
3632 "returned for location %u\n",
3633 __func__,
3634 NFS4_FS_LOCATION_MAXSERVERS,
3635 m, res->nlocations);
3636 for (i = loc->nservers; i < m; i++) {
3637 unsigned int len;
3638 char *data;
3639 status = decode_opaque_inline(xdr, &len, &data);
3640 if (unlikely(status != 0))
3641 goto out_eio;
3642 }
3643 break;
3644 }
3645 server = &loc->servers[loc->nservers];
3646 status = decode_opaque_inline(xdr, &server->len, &server->data);
3647 if (unlikely(status != 0))
3648 goto out_eio;
3649 dprintk("%s ", server->data);
3650 }
3651 status = decode_pathname(xdr, &loc->rootpath);
3652 if (unlikely(status != 0))
3653 goto out_eio;
3654 }
3655 if (res->nlocations != 0)
3656 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3657 out:
3658 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3659 return status;
3660 out_overflow:
3661 print_overflow_msg(__func__, xdr);
3662 out_eio:
3663 status = -EIO;
3664 goto out;
3665 }
3666
decode_attr_maxfilesize(struct xdr_stream * xdr,uint32_t * bitmap,uint64_t * res)3667 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3668 {
3669 __be32 *p;
3670 int status = 0;
3671
3672 *res = 0;
3673 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3674 return -EIO;
3675 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3676 p = xdr_inline_decode(xdr, 8);
3677 if (unlikely(!p))
3678 goto out_overflow;
3679 xdr_decode_hyper(p, res);
3680 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3681 }
3682 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3683 return status;
3684 out_overflow:
3685 print_overflow_msg(__func__, xdr);
3686 return -EIO;
3687 }
3688
decode_attr_maxlink(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * maxlink)3689 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3690 {
3691 __be32 *p;
3692 int status = 0;
3693
3694 *maxlink = 1;
3695 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3696 return -EIO;
3697 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3698 p = xdr_inline_decode(xdr, 4);
3699 if (unlikely(!p))
3700 goto out_overflow;
3701 *maxlink = be32_to_cpup(p);
3702 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3703 }
3704 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3705 return status;
3706 out_overflow:
3707 print_overflow_msg(__func__, xdr);
3708 return -EIO;
3709 }
3710
decode_attr_maxname(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * maxname)3711 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3712 {
3713 __be32 *p;
3714 int status = 0;
3715
3716 *maxname = 1024;
3717 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3718 return -EIO;
3719 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3720 p = xdr_inline_decode(xdr, 4);
3721 if (unlikely(!p))
3722 goto out_overflow;
3723 *maxname = be32_to_cpup(p);
3724 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3725 }
3726 dprintk("%s: maxname=%u\n", __func__, *maxname);
3727 return status;
3728 out_overflow:
3729 print_overflow_msg(__func__, xdr);
3730 return -EIO;
3731 }
3732
decode_attr_maxread(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * res)3733 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3734 {
3735 __be32 *p;
3736 int status = 0;
3737
3738 *res = 1024;
3739 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3740 return -EIO;
3741 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3742 uint64_t maxread;
3743 p = xdr_inline_decode(xdr, 8);
3744 if (unlikely(!p))
3745 goto out_overflow;
3746 xdr_decode_hyper(p, &maxread);
3747 if (maxread > 0x7FFFFFFF)
3748 maxread = 0x7FFFFFFF;
3749 *res = (uint32_t)maxread;
3750 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3751 }
3752 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3753 return status;
3754 out_overflow:
3755 print_overflow_msg(__func__, xdr);
3756 return -EIO;
3757 }
3758
decode_attr_maxwrite(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * res)3759 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3760 {
3761 __be32 *p;
3762 int status = 0;
3763
3764 *res = 1024;
3765 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3766 return -EIO;
3767 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3768 uint64_t maxwrite;
3769 p = xdr_inline_decode(xdr, 8);
3770 if (unlikely(!p))
3771 goto out_overflow;
3772 xdr_decode_hyper(p, &maxwrite);
3773 if (maxwrite > 0x7FFFFFFF)
3774 maxwrite = 0x7FFFFFFF;
3775 *res = (uint32_t)maxwrite;
3776 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3777 }
3778 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3779 return status;
3780 out_overflow:
3781 print_overflow_msg(__func__, xdr);
3782 return -EIO;
3783 }
3784
decode_attr_mode(struct xdr_stream * xdr,uint32_t * bitmap,umode_t * mode)3785 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3786 {
3787 uint32_t tmp;
3788 __be32 *p;
3789 int ret = 0;
3790
3791 *mode = 0;
3792 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3793 return -EIO;
3794 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3795 p = xdr_inline_decode(xdr, 4);
3796 if (unlikely(!p))
3797 goto out_overflow;
3798 tmp = be32_to_cpup(p);
3799 *mode = tmp & ~S_IFMT;
3800 bitmap[1] &= ~FATTR4_WORD1_MODE;
3801 ret = NFS_ATTR_FATTR_MODE;
3802 }
3803 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3804 return ret;
3805 out_overflow:
3806 print_overflow_msg(__func__, xdr);
3807 return -EIO;
3808 }
3809
decode_attr_nlink(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * nlink)3810 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3811 {
3812 __be32 *p;
3813 int ret = 0;
3814
3815 *nlink = 1;
3816 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3817 return -EIO;
3818 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3819 p = xdr_inline_decode(xdr, 4);
3820 if (unlikely(!p))
3821 goto out_overflow;
3822 *nlink = be32_to_cpup(p);
3823 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3824 ret = NFS_ATTR_FATTR_NLINK;
3825 }
3826 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3827 return ret;
3828 out_overflow:
3829 print_overflow_msg(__func__, xdr);
3830 return -EIO;
3831 }
3832
decode_attr_owner(struct xdr_stream * xdr,uint32_t * bitmap,const struct nfs_server * server,kuid_t * uid,struct nfs4_string * owner_name)3833 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3834 const struct nfs_server *server, kuid_t *uid,
3835 struct nfs4_string *owner_name)
3836 {
3837 uint32_t len;
3838 __be32 *p;
3839 int ret = 0;
3840
3841 *uid = make_kuid(&init_user_ns, -2);
3842 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3843 return -EIO;
3844 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3845 p = xdr_inline_decode(xdr, 4);
3846 if (unlikely(!p))
3847 goto out_overflow;
3848 len = be32_to_cpup(p);
3849 p = xdr_inline_decode(xdr, len);
3850 if (unlikely(!p))
3851 goto out_overflow;
3852 if (owner_name != NULL) {
3853 owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3854 if (owner_name->data != NULL) {
3855 owner_name->len = len;
3856 ret = NFS_ATTR_FATTR_OWNER_NAME;
3857 }
3858 } else if (len < XDR_MAX_NETOBJ) {
3859 if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3860 ret = NFS_ATTR_FATTR_OWNER;
3861 else
3862 dprintk("%s: nfs_map_name_to_uid failed!\n",
3863 __func__);
3864 } else
3865 dprintk("%s: name too long (%u)!\n",
3866 __func__, len);
3867 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3868 }
3869 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3870 return ret;
3871 out_overflow:
3872 print_overflow_msg(__func__, xdr);
3873 return -EIO;
3874 }
3875
decode_attr_group(struct xdr_stream * xdr,uint32_t * bitmap,const struct nfs_server * server,kgid_t * gid,struct nfs4_string * group_name)3876 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3877 const struct nfs_server *server, kgid_t *gid,
3878 struct nfs4_string *group_name)
3879 {
3880 uint32_t len;
3881 __be32 *p;
3882 int ret = 0;
3883
3884 *gid = make_kgid(&init_user_ns, -2);
3885 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3886 return -EIO;
3887 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3888 p = xdr_inline_decode(xdr, 4);
3889 if (unlikely(!p))
3890 goto out_overflow;
3891 len = be32_to_cpup(p);
3892 p = xdr_inline_decode(xdr, len);
3893 if (unlikely(!p))
3894 goto out_overflow;
3895 if (group_name != NULL) {
3896 group_name->data = kmemdup(p, len, GFP_NOWAIT);
3897 if (group_name->data != NULL) {
3898 group_name->len = len;
3899 ret = NFS_ATTR_FATTR_GROUP_NAME;
3900 }
3901 } else if (len < XDR_MAX_NETOBJ) {
3902 if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3903 ret = NFS_ATTR_FATTR_GROUP;
3904 else
3905 dprintk("%s: nfs_map_group_to_gid failed!\n",
3906 __func__);
3907 } else
3908 dprintk("%s: name too long (%u)!\n",
3909 __func__, len);
3910 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3911 }
3912 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3913 return ret;
3914 out_overflow:
3915 print_overflow_msg(__func__, xdr);
3916 return -EIO;
3917 }
3918
decode_attr_rdev(struct xdr_stream * xdr,uint32_t * bitmap,dev_t * rdev)3919 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3920 {
3921 uint32_t major = 0, minor = 0;
3922 __be32 *p;
3923 int ret = 0;
3924
3925 *rdev = MKDEV(0,0);
3926 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3927 return -EIO;
3928 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3929 dev_t tmp;
3930
3931 p = xdr_inline_decode(xdr, 8);
3932 if (unlikely(!p))
3933 goto out_overflow;
3934 major = be32_to_cpup(p++);
3935 minor = be32_to_cpup(p);
3936 tmp = MKDEV(major, minor);
3937 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3938 *rdev = tmp;
3939 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3940 ret = NFS_ATTR_FATTR_RDEV;
3941 }
3942 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3943 return ret;
3944 out_overflow:
3945 print_overflow_msg(__func__, xdr);
3946 return -EIO;
3947 }
3948
decode_attr_space_avail(struct xdr_stream * xdr,uint32_t * bitmap,uint64_t * res)3949 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3950 {
3951 __be32 *p;
3952 int status = 0;
3953
3954 *res = 0;
3955 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3956 return -EIO;
3957 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3958 p = xdr_inline_decode(xdr, 8);
3959 if (unlikely(!p))
3960 goto out_overflow;
3961 xdr_decode_hyper(p, res);
3962 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3963 }
3964 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3965 return status;
3966 out_overflow:
3967 print_overflow_msg(__func__, xdr);
3968 return -EIO;
3969 }
3970
decode_attr_space_free(struct xdr_stream * xdr,uint32_t * bitmap,uint64_t * res)3971 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3972 {
3973 __be32 *p;
3974 int status = 0;
3975
3976 *res = 0;
3977 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3978 return -EIO;
3979 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3980 p = xdr_inline_decode(xdr, 8);
3981 if (unlikely(!p))
3982 goto out_overflow;
3983 xdr_decode_hyper(p, res);
3984 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3985 }
3986 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3987 return status;
3988 out_overflow:
3989 print_overflow_msg(__func__, xdr);
3990 return -EIO;
3991 }
3992
decode_attr_space_total(struct xdr_stream * xdr,uint32_t * bitmap,uint64_t * res)3993 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3994 {
3995 __be32 *p;
3996 int status = 0;
3997
3998 *res = 0;
3999 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4000 return -EIO;
4001 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4002 p = xdr_inline_decode(xdr, 8);
4003 if (unlikely(!p))
4004 goto out_overflow;
4005 xdr_decode_hyper(p, res);
4006 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4007 }
4008 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4009 return status;
4010 out_overflow:
4011 print_overflow_msg(__func__, xdr);
4012 return -EIO;
4013 }
4014
decode_attr_space_used(struct xdr_stream * xdr,uint32_t * bitmap,uint64_t * used)4015 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4016 {
4017 __be32 *p;
4018 int ret = 0;
4019
4020 *used = 0;
4021 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4022 return -EIO;
4023 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4024 p = xdr_inline_decode(xdr, 8);
4025 if (unlikely(!p))
4026 goto out_overflow;
4027 xdr_decode_hyper(p, used);
4028 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4029 ret = NFS_ATTR_FATTR_SPACE_USED;
4030 }
4031 dprintk("%s: space used=%Lu\n", __func__,
4032 (unsigned long long)*used);
4033 return ret;
4034 out_overflow:
4035 print_overflow_msg(__func__, xdr);
4036 return -EIO;
4037 }
4038
decode_attr_time(struct xdr_stream * xdr,struct timespec * time)4039 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4040 {
4041 __be32 *p;
4042 uint64_t sec;
4043 uint32_t nsec;
4044
4045 p = xdr_inline_decode(xdr, 12);
4046 if (unlikely(!p))
4047 goto out_overflow;
4048 p = xdr_decode_hyper(p, &sec);
4049 nsec = be32_to_cpup(p);
4050 time->tv_sec = (time_t)sec;
4051 time->tv_nsec = (long)nsec;
4052 return 0;
4053 out_overflow:
4054 print_overflow_msg(__func__, xdr);
4055 return -EIO;
4056 }
4057
decode_attr_time_access(struct xdr_stream * xdr,uint32_t * bitmap,struct timespec * time)4058 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4059 {
4060 int status = 0;
4061
4062 time->tv_sec = 0;
4063 time->tv_nsec = 0;
4064 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4065 return -EIO;
4066 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4067 status = decode_attr_time(xdr, time);
4068 if (status == 0)
4069 status = NFS_ATTR_FATTR_ATIME;
4070 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4071 }
4072 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4073 return status;
4074 }
4075
decode_attr_time_metadata(struct xdr_stream * xdr,uint32_t * bitmap,struct timespec * time)4076 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4077 {
4078 int status = 0;
4079
4080 time->tv_sec = 0;
4081 time->tv_nsec = 0;
4082 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4083 return -EIO;
4084 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4085 status = decode_attr_time(xdr, time);
4086 if (status == 0)
4087 status = NFS_ATTR_FATTR_CTIME;
4088 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4089 }
4090 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4091 return status;
4092 }
4093
decode_attr_time_delta(struct xdr_stream * xdr,uint32_t * bitmap,struct timespec * time)4094 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4095 struct timespec *time)
4096 {
4097 int status = 0;
4098
4099 time->tv_sec = 0;
4100 time->tv_nsec = 0;
4101 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4102 return -EIO;
4103 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4104 status = decode_attr_time(xdr, time);
4105 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4106 }
4107 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4108 (long)time->tv_nsec);
4109 return status;
4110 }
4111
decode_attr_security_label(struct xdr_stream * xdr,uint32_t * bitmap,struct nfs4_label * label)4112 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4113 struct nfs4_label *label)
4114 {
4115 uint32_t pi = 0;
4116 uint32_t lfs = 0;
4117 __u32 len;
4118 __be32 *p;
4119 int status = 0;
4120
4121 if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4122 return -EIO;
4123 if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4124 p = xdr_inline_decode(xdr, 4);
4125 if (unlikely(!p))
4126 goto out_overflow;
4127 lfs = be32_to_cpup(p++);
4128 p = xdr_inline_decode(xdr, 4);
4129 if (unlikely(!p))
4130 goto out_overflow;
4131 pi = be32_to_cpup(p++);
4132 p = xdr_inline_decode(xdr, 4);
4133 if (unlikely(!p))
4134 goto out_overflow;
4135 len = be32_to_cpup(p++);
4136 p = xdr_inline_decode(xdr, len);
4137 if (unlikely(!p))
4138 goto out_overflow;
4139 if (len < NFS4_MAXLABELLEN) {
4140 if (label) {
4141 memcpy(label->label, p, len);
4142 label->len = len;
4143 label->pi = pi;
4144 label->lfs = lfs;
4145 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4146 }
4147 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4148 } else
4149 printk(KERN_WARNING "%s: label too long (%u)!\n",
4150 __func__, len);
4151 }
4152 if (label && label->label)
4153 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4154 (char *)label->label, label->len, label->pi, label->lfs);
4155 return status;
4156
4157 out_overflow:
4158 print_overflow_msg(__func__, xdr);
4159 return -EIO;
4160 }
4161
decode_attr_time_modify(struct xdr_stream * xdr,uint32_t * bitmap,struct timespec * time)4162 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4163 {
4164 int status = 0;
4165
4166 time->tv_sec = 0;
4167 time->tv_nsec = 0;
4168 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4169 return -EIO;
4170 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4171 status = decode_attr_time(xdr, time);
4172 if (status == 0)
4173 status = NFS_ATTR_FATTR_MTIME;
4174 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4175 }
4176 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4177 return status;
4178 }
4179
verify_attr_len(struct xdr_stream * xdr,unsigned int savep,uint32_t attrlen)4180 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4181 {
4182 unsigned int attrwords = XDR_QUADLEN(attrlen);
4183 unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4184
4185 if (unlikely(attrwords != nwords)) {
4186 dprintk("%s: server returned incorrect attribute length: "
4187 "%u %c %u\n",
4188 __func__,
4189 attrwords << 2,
4190 (attrwords < nwords) ? '<' : '>',
4191 nwords << 2);
4192 return -EIO;
4193 }
4194 return 0;
4195 }
4196
decode_change_info(struct xdr_stream * xdr,struct nfs4_change_info * cinfo)4197 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4198 {
4199 __be32 *p;
4200
4201 p = xdr_inline_decode(xdr, 20);
4202 if (unlikely(!p))
4203 goto out_overflow;
4204 cinfo->atomic = be32_to_cpup(p++);
4205 p = xdr_decode_hyper(p, &cinfo->before);
4206 xdr_decode_hyper(p, &cinfo->after);
4207 return 0;
4208 out_overflow:
4209 print_overflow_msg(__func__, xdr);
4210 return -EIO;
4211 }
4212
decode_access(struct xdr_stream * xdr,u32 * supported,u32 * access)4213 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4214 {
4215 __be32 *p;
4216 uint32_t supp, acc;
4217 int status;
4218
4219 status = decode_op_hdr(xdr, OP_ACCESS);
4220 if (status)
4221 return status;
4222 p = xdr_inline_decode(xdr, 8);
4223 if (unlikely(!p))
4224 goto out_overflow;
4225 supp = be32_to_cpup(p++);
4226 acc = be32_to_cpup(p);
4227 *supported = supp;
4228 *access = acc;
4229 return 0;
4230 out_overflow:
4231 print_overflow_msg(__func__, xdr);
4232 return -EIO;
4233 }
4234
decode_opaque_fixed(struct xdr_stream * xdr,void * buf,size_t len)4235 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4236 {
4237 __be32 *p;
4238
4239 p = xdr_inline_decode(xdr, len);
4240 if (likely(p)) {
4241 memcpy(buf, p, len);
4242 return 0;
4243 }
4244 print_overflow_msg(__func__, xdr);
4245 return -EIO;
4246 }
4247
decode_stateid(struct xdr_stream * xdr,nfs4_stateid * stateid)4248 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4249 {
4250 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4251 }
4252
decode_close(struct xdr_stream * xdr,struct nfs_closeres * res)4253 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4254 {
4255 int status;
4256
4257 status = decode_op_hdr(xdr, OP_CLOSE);
4258 if (status != -EIO)
4259 nfs_increment_open_seqid(status, res->seqid);
4260 if (!status)
4261 status = decode_stateid(xdr, &res->stateid);
4262 return status;
4263 }
4264
decode_verifier(struct xdr_stream * xdr,void * verifier)4265 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4266 {
4267 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4268 }
4269
decode_write_verifier(struct xdr_stream * xdr,struct nfs_write_verifier * verifier)4270 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4271 {
4272 return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4273 }
4274
decode_commit(struct xdr_stream * xdr,struct nfs_commitres * res)4275 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4276 {
4277 int status;
4278
4279 status = decode_op_hdr(xdr, OP_COMMIT);
4280 if (!status)
4281 status = decode_write_verifier(xdr, &res->verf->verifier);
4282 return status;
4283 }
4284
decode_create(struct xdr_stream * xdr,struct nfs4_change_info * cinfo)4285 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4286 {
4287 __be32 *p;
4288 uint32_t bmlen;
4289 int status;
4290
4291 status = decode_op_hdr(xdr, OP_CREATE);
4292 if (status)
4293 return status;
4294 if ((status = decode_change_info(xdr, cinfo)))
4295 return status;
4296 p = xdr_inline_decode(xdr, 4);
4297 if (unlikely(!p))
4298 goto out_overflow;
4299 bmlen = be32_to_cpup(p);
4300 p = xdr_inline_decode(xdr, bmlen << 2);
4301 if (likely(p))
4302 return 0;
4303 out_overflow:
4304 print_overflow_msg(__func__, xdr);
4305 return -EIO;
4306 }
4307
decode_server_caps(struct xdr_stream * xdr,struct nfs4_server_caps_res * res)4308 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4309 {
4310 unsigned int savep;
4311 uint32_t attrlen, bitmap[3] = {0};
4312 int status;
4313
4314 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4315 goto xdr_error;
4316 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4317 goto xdr_error;
4318 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4319 goto xdr_error;
4320 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4321 goto xdr_error;
4322 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4323 &res->fh_expire_type)) != 0)
4324 goto xdr_error;
4325 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4326 goto xdr_error;
4327 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4328 goto xdr_error;
4329 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4330 goto xdr_error;
4331 status = verify_attr_len(xdr, savep, attrlen);
4332 xdr_error:
4333 dprintk("%s: xdr returned %d!\n", __func__, -status);
4334 return status;
4335 }
4336
decode_statfs(struct xdr_stream * xdr,struct nfs_fsstat * fsstat)4337 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4338 {
4339 unsigned int savep;
4340 uint32_t attrlen, bitmap[3] = {0};
4341 int status;
4342
4343 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4344 goto xdr_error;
4345 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4346 goto xdr_error;
4347 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4348 goto xdr_error;
4349
4350 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4351 goto xdr_error;
4352 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4353 goto xdr_error;
4354 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4355 goto xdr_error;
4356 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4357 goto xdr_error;
4358 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4359 goto xdr_error;
4360 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4361 goto xdr_error;
4362
4363 status = verify_attr_len(xdr, savep, attrlen);
4364 xdr_error:
4365 dprintk("%s: xdr returned %d!\n", __func__, -status);
4366 return status;
4367 }
4368
decode_pathconf(struct xdr_stream * xdr,struct nfs_pathconf * pathconf)4369 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4370 {
4371 unsigned int savep;
4372 uint32_t attrlen, bitmap[3] = {0};
4373 int status;
4374
4375 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4376 goto xdr_error;
4377 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4378 goto xdr_error;
4379 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4380 goto xdr_error;
4381
4382 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4383 goto xdr_error;
4384 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4385 goto xdr_error;
4386
4387 status = verify_attr_len(xdr, savep, attrlen);
4388 xdr_error:
4389 dprintk("%s: xdr returned %d!\n", __func__, -status);
4390 return status;
4391 }
4392
decode_threshold_hint(struct xdr_stream * xdr,uint32_t * bitmap,uint64_t * res,uint32_t hint_bit)4393 static int decode_threshold_hint(struct xdr_stream *xdr,
4394 uint32_t *bitmap,
4395 uint64_t *res,
4396 uint32_t hint_bit)
4397 {
4398 __be32 *p;
4399
4400 *res = 0;
4401 if (likely(bitmap[0] & hint_bit)) {
4402 p = xdr_inline_decode(xdr, 8);
4403 if (unlikely(!p))
4404 goto out_overflow;
4405 xdr_decode_hyper(p, res);
4406 }
4407 return 0;
4408 out_overflow:
4409 print_overflow_msg(__func__, xdr);
4410 return -EIO;
4411 }
4412
decode_first_threshold_item4(struct xdr_stream * xdr,struct nfs4_threshold * res)4413 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4414 struct nfs4_threshold *res)
4415 {
4416 __be32 *p;
4417 unsigned int savep;
4418 uint32_t bitmap[3] = {0,}, attrlen;
4419 int status;
4420
4421 /* layout type */
4422 p = xdr_inline_decode(xdr, 4);
4423 if (unlikely(!p)) {
4424 print_overflow_msg(__func__, xdr);
4425 return -EIO;
4426 }
4427 res->l_type = be32_to_cpup(p);
4428
4429 /* thi_hintset bitmap */
4430 status = decode_attr_bitmap(xdr, bitmap);
4431 if (status < 0)
4432 goto xdr_error;
4433
4434 /* thi_hintlist length */
4435 status = decode_attr_length(xdr, &attrlen, &savep);
4436 if (status < 0)
4437 goto xdr_error;
4438 /* thi_hintlist */
4439 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4440 if (status < 0)
4441 goto xdr_error;
4442 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4443 if (status < 0)
4444 goto xdr_error;
4445 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4446 THRESHOLD_RD_IO);
4447 if (status < 0)
4448 goto xdr_error;
4449 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4450 THRESHOLD_WR_IO);
4451 if (status < 0)
4452 goto xdr_error;
4453
4454 status = verify_attr_len(xdr, savep, attrlen);
4455 res->bm = bitmap[0];
4456
4457 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4458 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4459 res->wr_io_sz);
4460 xdr_error:
4461 dprintk("%s ret=%d!\n", __func__, status);
4462 return status;
4463 }
4464
4465 /*
4466 * Thresholds on pNFS direct I/O vrs MDS I/O
4467 */
decode_attr_mdsthreshold(struct xdr_stream * xdr,uint32_t * bitmap,struct nfs4_threshold * res)4468 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4469 uint32_t *bitmap,
4470 struct nfs4_threshold *res)
4471 {
4472 __be32 *p;
4473 int status = 0;
4474 uint32_t num;
4475
4476 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4477 return -EIO;
4478 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4479 /* Did the server return an unrequested attribute? */
4480 if (unlikely(res == NULL))
4481 return -EREMOTEIO;
4482 p = xdr_inline_decode(xdr, 4);
4483 if (unlikely(!p))
4484 goto out_overflow;
4485 num = be32_to_cpup(p);
4486 if (num == 0)
4487 return 0;
4488 if (num > 1)
4489 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4490 "drivers per filesystem not supported\n",
4491 __func__);
4492
4493 status = decode_first_threshold_item4(xdr, res);
4494 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4495 }
4496 return status;
4497 out_overflow:
4498 print_overflow_msg(__func__, xdr);
4499 return -EIO;
4500 }
4501
decode_getfattr_attrs(struct xdr_stream * xdr,uint32_t * bitmap,struct nfs_fattr * fattr,struct nfs_fh * fh,struct nfs4_fs_locations * fs_loc,struct nfs4_label * label,const struct nfs_server * server)4502 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4503 struct nfs_fattr *fattr, struct nfs_fh *fh,
4504 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4505 const struct nfs_server *server)
4506 {
4507 int status;
4508 umode_t fmode = 0;
4509 uint32_t type;
4510 int32_t err;
4511
4512 status = decode_attr_type(xdr, bitmap, &type);
4513 if (status < 0)
4514 goto xdr_error;
4515 fattr->mode = 0;
4516 if (status != 0) {
4517 fattr->mode |= nfs_type2fmt[type];
4518 fattr->valid |= status;
4519 }
4520
4521 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4522 if (status < 0)
4523 goto xdr_error;
4524 fattr->valid |= status;
4525
4526 status = decode_attr_size(xdr, bitmap, &fattr->size);
4527 if (status < 0)
4528 goto xdr_error;
4529 fattr->valid |= status;
4530
4531 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4532 if (status < 0)
4533 goto xdr_error;
4534 fattr->valid |= status;
4535
4536 err = 0;
4537 status = decode_attr_error(xdr, bitmap, &err);
4538 if (status < 0)
4539 goto xdr_error;
4540
4541 status = decode_attr_filehandle(xdr, bitmap, fh);
4542 if (status < 0)
4543 goto xdr_error;
4544
4545 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4546 if (status < 0)
4547 goto xdr_error;
4548 fattr->valid |= status;
4549
4550 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4551 if (status < 0)
4552 goto xdr_error;
4553 fattr->valid |= status;
4554
4555 status = decode_attr_mode(xdr, bitmap, &fmode);
4556 if (status < 0)
4557 goto xdr_error;
4558 if (status != 0) {
4559 fattr->mode |= fmode;
4560 fattr->valid |= status;
4561 }
4562
4563 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4564 if (status < 0)
4565 goto xdr_error;
4566 fattr->valid |= status;
4567
4568 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4569 if (status < 0)
4570 goto xdr_error;
4571 fattr->valid |= status;
4572
4573 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4574 if (status < 0)
4575 goto xdr_error;
4576 fattr->valid |= status;
4577
4578 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4579 if (status < 0)
4580 goto xdr_error;
4581 fattr->valid |= status;
4582
4583 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4584 if (status < 0)
4585 goto xdr_error;
4586 fattr->valid |= status;
4587
4588 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4589 if (status < 0)
4590 goto xdr_error;
4591 fattr->valid |= status;
4592
4593 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4594 if (status < 0)
4595 goto xdr_error;
4596 fattr->valid |= status;
4597
4598 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4599 if (status < 0)
4600 goto xdr_error;
4601 fattr->valid |= status;
4602
4603 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4604 if (status < 0)
4605 goto xdr_error;
4606 fattr->valid |= status;
4607
4608 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4609 if (status < 0)
4610 goto xdr_error;
4611
4612 if (label) {
4613 status = decode_attr_security_label(xdr, bitmap, label);
4614 if (status < 0)
4615 goto xdr_error;
4616 fattr->valid |= status;
4617 }
4618
4619 xdr_error:
4620 dprintk("%s: xdr returned %d\n", __func__, -status);
4621 return status;
4622 }
4623
decode_getfattr_generic(struct xdr_stream * xdr,struct nfs_fattr * fattr,struct nfs_fh * fh,struct nfs4_fs_locations * fs_loc,struct nfs4_label * label,const struct nfs_server * server)4624 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4625 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4626 struct nfs4_label *label, const struct nfs_server *server)
4627 {
4628 unsigned int savep;
4629 uint32_t attrlen,
4630 bitmap[3] = {0};
4631 int status;
4632
4633 status = decode_op_hdr(xdr, OP_GETATTR);
4634 if (status < 0)
4635 goto xdr_error;
4636
4637 status = decode_attr_bitmap(xdr, bitmap);
4638 if (status < 0)
4639 goto xdr_error;
4640
4641 status = decode_attr_length(xdr, &attrlen, &savep);
4642 if (status < 0)
4643 goto xdr_error;
4644
4645 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4646 label, server);
4647 if (status < 0)
4648 goto xdr_error;
4649
4650 status = verify_attr_len(xdr, savep, attrlen);
4651 xdr_error:
4652 dprintk("%s: xdr returned %d\n", __func__, -status);
4653 return status;
4654 }
4655
decode_getfattr_label(struct xdr_stream * xdr,struct nfs_fattr * fattr,struct nfs4_label * label,const struct nfs_server * server)4656 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4657 struct nfs4_label *label, const struct nfs_server *server)
4658 {
4659 return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4660 }
4661
decode_getfattr(struct xdr_stream * xdr,struct nfs_fattr * fattr,const struct nfs_server * server)4662 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4663 const struct nfs_server *server)
4664 {
4665 return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4666 }
4667
4668 /*
4669 * Decode potentially multiple layout types. Currently we only support
4670 * one layout driver per file system.
4671 */
decode_first_pnfs_layout_type(struct xdr_stream * xdr,uint32_t * layouttype)4672 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4673 uint32_t *layouttype)
4674 {
4675 __be32 *p;
4676 int num;
4677
4678 p = xdr_inline_decode(xdr, 4);
4679 if (unlikely(!p))
4680 goto out_overflow;
4681 num = be32_to_cpup(p);
4682
4683 /* pNFS is not supported by the underlying file system */
4684 if (num == 0) {
4685 *layouttype = 0;
4686 return 0;
4687 }
4688 if (num > 1)
4689 printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
4690 "drivers per filesystem not supported\n", __func__);
4691
4692 /* Decode and set first layout type, move xdr->p past unused types */
4693 p = xdr_inline_decode(xdr, num * 4);
4694 if (unlikely(!p))
4695 goto out_overflow;
4696 *layouttype = be32_to_cpup(p);
4697 return 0;
4698 out_overflow:
4699 print_overflow_msg(__func__, xdr);
4700 return -EIO;
4701 }
4702
4703 /*
4704 * The type of file system exported.
4705 * Note we must ensure that layouttype is set in any non-error case.
4706 */
decode_attr_pnfstype(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * layouttype)4707 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4708 uint32_t *layouttype)
4709 {
4710 int status = 0;
4711
4712 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4713 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4714 return -EIO;
4715 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4716 status = decode_first_pnfs_layout_type(xdr, layouttype);
4717 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4718 } else
4719 *layouttype = 0;
4720 return status;
4721 }
4722
4723 /*
4724 * The prefered block size for layout directed io
4725 */
decode_attr_layout_blksize(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * res)4726 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4727 uint32_t *res)
4728 {
4729 __be32 *p;
4730
4731 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4732 *res = 0;
4733 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4734 p = xdr_inline_decode(xdr, 4);
4735 if (unlikely(!p)) {
4736 print_overflow_msg(__func__, xdr);
4737 return -EIO;
4738 }
4739 *res = be32_to_cpup(p);
4740 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4741 }
4742 return 0;
4743 }
4744
decode_fsinfo(struct xdr_stream * xdr,struct nfs_fsinfo * fsinfo)4745 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4746 {
4747 unsigned int savep;
4748 uint32_t attrlen, bitmap[3];
4749 int status;
4750
4751 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4752 goto xdr_error;
4753 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4754 goto xdr_error;
4755 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4756 goto xdr_error;
4757
4758 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4759
4760 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4761 goto xdr_error;
4762 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4763 goto xdr_error;
4764 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4765 goto xdr_error;
4766 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4767 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4768 goto xdr_error;
4769 fsinfo->wtpref = fsinfo->wtmax;
4770 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4771 if (status != 0)
4772 goto xdr_error;
4773 status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4774 if (status != 0)
4775 goto xdr_error;
4776 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4777 if (status)
4778 goto xdr_error;
4779
4780 status = verify_attr_len(xdr, savep, attrlen);
4781 xdr_error:
4782 dprintk("%s: xdr returned %d!\n", __func__, -status);
4783 return status;
4784 }
4785
decode_getfh(struct xdr_stream * xdr,struct nfs_fh * fh)4786 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4787 {
4788 __be32 *p;
4789 uint32_t len;
4790 int status;
4791
4792 /* Zero handle first to allow comparisons */
4793 memset(fh, 0, sizeof(*fh));
4794
4795 status = decode_op_hdr(xdr, OP_GETFH);
4796 if (status)
4797 return status;
4798
4799 p = xdr_inline_decode(xdr, 4);
4800 if (unlikely(!p))
4801 goto out_overflow;
4802 len = be32_to_cpup(p);
4803 if (len > NFS4_FHSIZE)
4804 return -EIO;
4805 fh->size = len;
4806 p = xdr_inline_decode(xdr, len);
4807 if (unlikely(!p))
4808 goto out_overflow;
4809 memcpy(fh->data, p, len);
4810 return 0;
4811 out_overflow:
4812 print_overflow_msg(__func__, xdr);
4813 return -EIO;
4814 }
4815
decode_link(struct xdr_stream * xdr,struct nfs4_change_info * cinfo)4816 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4817 {
4818 int status;
4819
4820 status = decode_op_hdr(xdr, OP_LINK);
4821 if (status)
4822 return status;
4823 return decode_change_info(xdr, cinfo);
4824 }
4825
4826 /*
4827 * We create the owner, so we know a proper owner.id length is 4.
4828 */
decode_lock_denied(struct xdr_stream * xdr,struct file_lock * fl)4829 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4830 {
4831 uint64_t offset, length, clientid;
4832 __be32 *p;
4833 uint32_t namelen, type;
4834
4835 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4836 if (unlikely(!p))
4837 goto out_overflow;
4838 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4839 p = xdr_decode_hyper(p, &length);
4840 type = be32_to_cpup(p++); /* 4 byte read */
4841 if (fl != NULL) { /* manipulate file lock */
4842 fl->fl_start = (loff_t)offset;
4843 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4844 if (length == ~(uint64_t)0)
4845 fl->fl_end = OFFSET_MAX;
4846 fl->fl_type = F_WRLCK;
4847 if (type & 1)
4848 fl->fl_type = F_RDLCK;
4849 fl->fl_pid = 0;
4850 }
4851 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4852 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4853 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4854 if (likely(p))
4855 return -NFS4ERR_DENIED;
4856 out_overflow:
4857 print_overflow_msg(__func__, xdr);
4858 return -EIO;
4859 }
4860
decode_lock(struct xdr_stream * xdr,struct nfs_lock_res * res)4861 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4862 {
4863 int status;
4864
4865 status = decode_op_hdr(xdr, OP_LOCK);
4866 if (status == -EIO)
4867 goto out;
4868 if (status == 0) {
4869 status = decode_stateid(xdr, &res->stateid);
4870 if (unlikely(status))
4871 goto out;
4872 } else if (status == -NFS4ERR_DENIED)
4873 status = decode_lock_denied(xdr, NULL);
4874 if (res->open_seqid != NULL)
4875 nfs_increment_open_seqid(status, res->open_seqid);
4876 nfs_increment_lock_seqid(status, res->lock_seqid);
4877 out:
4878 return status;
4879 }
4880
decode_lockt(struct xdr_stream * xdr,struct nfs_lockt_res * res)4881 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4882 {
4883 int status;
4884 status = decode_op_hdr(xdr, OP_LOCKT);
4885 if (status == -NFS4ERR_DENIED)
4886 return decode_lock_denied(xdr, res->denied);
4887 return status;
4888 }
4889
decode_locku(struct xdr_stream * xdr,struct nfs_locku_res * res)4890 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4891 {
4892 int status;
4893
4894 status = decode_op_hdr(xdr, OP_LOCKU);
4895 if (status != -EIO)
4896 nfs_increment_lock_seqid(status, res->seqid);
4897 if (status == 0)
4898 status = decode_stateid(xdr, &res->stateid);
4899 return status;
4900 }
4901
decode_release_lockowner(struct xdr_stream * xdr)4902 static int decode_release_lockowner(struct xdr_stream *xdr)
4903 {
4904 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4905 }
4906
decode_lookup(struct xdr_stream * xdr)4907 static int decode_lookup(struct xdr_stream *xdr)
4908 {
4909 return decode_op_hdr(xdr, OP_LOOKUP);
4910 }
4911
4912 /* This is too sick! */
decode_space_limit(struct xdr_stream * xdr,u64 * maxsize)4913 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4914 {
4915 __be32 *p;
4916 uint32_t limit_type, nblocks, blocksize;
4917
4918 p = xdr_inline_decode(xdr, 12);
4919 if (unlikely(!p))
4920 goto out_overflow;
4921 limit_type = be32_to_cpup(p++);
4922 switch (limit_type) {
4923 case 1:
4924 xdr_decode_hyper(p, maxsize);
4925 break;
4926 case 2:
4927 nblocks = be32_to_cpup(p++);
4928 blocksize = be32_to_cpup(p);
4929 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4930 }
4931 return 0;
4932 out_overflow:
4933 print_overflow_msg(__func__, xdr);
4934 return -EIO;
4935 }
4936
decode_delegation(struct xdr_stream * xdr,struct nfs_openres * res)4937 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4938 {
4939 __be32 *p;
4940 uint32_t delegation_type;
4941 int status;
4942
4943 p = xdr_inline_decode(xdr, 4);
4944 if (unlikely(!p))
4945 goto out_overflow;
4946 delegation_type = be32_to_cpup(p);
4947 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4948 res->delegation_type = 0;
4949 return 0;
4950 }
4951 status = decode_stateid(xdr, &res->delegation);
4952 if (unlikely(status))
4953 return status;
4954 p = xdr_inline_decode(xdr, 4);
4955 if (unlikely(!p))
4956 goto out_overflow;
4957 res->do_recall = be32_to_cpup(p);
4958
4959 switch (delegation_type) {
4960 case NFS4_OPEN_DELEGATE_READ:
4961 res->delegation_type = FMODE_READ;
4962 break;
4963 case NFS4_OPEN_DELEGATE_WRITE:
4964 res->delegation_type = FMODE_WRITE|FMODE_READ;
4965 if (decode_space_limit(xdr, &res->maxsize) < 0)
4966 return -EIO;
4967 }
4968 return decode_ace(xdr, NULL, res->server->nfs_client);
4969 out_overflow:
4970 print_overflow_msg(__func__, xdr);
4971 return -EIO;
4972 }
4973
decode_open(struct xdr_stream * xdr,struct nfs_openres * res)4974 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4975 {
4976 __be32 *p;
4977 uint32_t savewords, bmlen, i;
4978 int status;
4979
4980 if (!__decode_op_hdr(xdr, OP_OPEN, &status))
4981 return status;
4982 nfs_increment_open_seqid(status, res->seqid);
4983 if (status)
4984 return status;
4985 status = decode_stateid(xdr, &res->stateid);
4986 if (unlikely(status))
4987 return status;
4988
4989 decode_change_info(xdr, &res->cinfo);
4990
4991 p = xdr_inline_decode(xdr, 8);
4992 if (unlikely(!p))
4993 goto out_overflow;
4994 res->rflags = be32_to_cpup(p++);
4995 bmlen = be32_to_cpup(p);
4996 if (bmlen > 10)
4997 goto xdr_error;
4998
4999 p = xdr_inline_decode(xdr, bmlen << 2);
5000 if (unlikely(!p))
5001 goto out_overflow;
5002 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5003 for (i = 0; i < savewords; ++i)
5004 res->attrset[i] = be32_to_cpup(p++);
5005 for (; i < NFS4_BITMAP_SIZE; i++)
5006 res->attrset[i] = 0;
5007
5008 return decode_delegation(xdr, res);
5009 xdr_error:
5010 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5011 return -EIO;
5012 out_overflow:
5013 print_overflow_msg(__func__, xdr);
5014 return -EIO;
5015 }
5016
decode_open_confirm(struct xdr_stream * xdr,struct nfs_open_confirmres * res)5017 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5018 {
5019 int status;
5020
5021 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5022 if (status != -EIO)
5023 nfs_increment_open_seqid(status, res->seqid);
5024 if (!status)
5025 status = decode_stateid(xdr, &res->stateid);
5026 return status;
5027 }
5028
decode_open_downgrade(struct xdr_stream * xdr,struct nfs_closeres * res)5029 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5030 {
5031 int status;
5032
5033 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5034 if (status != -EIO)
5035 nfs_increment_open_seqid(status, res->seqid);
5036 if (!status)
5037 status = decode_stateid(xdr, &res->stateid);
5038 return status;
5039 }
5040
decode_putfh(struct xdr_stream * xdr)5041 static int decode_putfh(struct xdr_stream *xdr)
5042 {
5043 return decode_op_hdr(xdr, OP_PUTFH);
5044 }
5045
decode_putrootfh(struct xdr_stream * xdr)5046 static int decode_putrootfh(struct xdr_stream *xdr)
5047 {
5048 return decode_op_hdr(xdr, OP_PUTROOTFH);
5049 }
5050
decode_read(struct xdr_stream * xdr,struct rpc_rqst * req,struct nfs_pgio_res * res)5051 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5052 struct nfs_pgio_res *res)
5053 {
5054 __be32 *p;
5055 uint32_t count, eof, recvd;
5056 int status;
5057
5058 status = decode_op_hdr(xdr, OP_READ);
5059 if (status)
5060 return status;
5061 p = xdr_inline_decode(xdr, 8);
5062 if (unlikely(!p))
5063 goto out_overflow;
5064 eof = be32_to_cpup(p++);
5065 count = be32_to_cpup(p);
5066 recvd = xdr_read_pages(xdr, count);
5067 if (count > recvd) {
5068 dprintk("NFS: server cheating in read reply: "
5069 "count %u > recvd %u\n", count, recvd);
5070 count = recvd;
5071 eof = 0;
5072 }
5073 res->eof = eof;
5074 res->count = count;
5075 return 0;
5076 out_overflow:
5077 print_overflow_msg(__func__, xdr);
5078 return -EIO;
5079 }
5080
decode_readdir(struct xdr_stream * xdr,struct rpc_rqst * req,struct nfs4_readdir_res * readdir)5081 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5082 {
5083 int status;
5084 __be32 verf[2];
5085
5086 status = decode_op_hdr(xdr, OP_READDIR);
5087 if (!status)
5088 status = decode_verifier(xdr, readdir->verifier.data);
5089 if (unlikely(status))
5090 return status;
5091 memcpy(verf, readdir->verifier.data, sizeof(verf));
5092 dprintk("%s: verifier = %08x:%08x\n",
5093 __func__, verf[0], verf[1]);
5094 return xdr_read_pages(xdr, xdr->buf->page_len);
5095 }
5096
decode_readlink(struct xdr_stream * xdr,struct rpc_rqst * req)5097 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5098 {
5099 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5100 u32 len, recvd;
5101 __be32 *p;
5102 int status;
5103
5104 status = decode_op_hdr(xdr, OP_READLINK);
5105 if (status)
5106 return status;
5107
5108 /* Convert length of symlink */
5109 p = xdr_inline_decode(xdr, 4);
5110 if (unlikely(!p))
5111 goto out_overflow;
5112 len = be32_to_cpup(p);
5113 if (len >= rcvbuf->page_len || len <= 0) {
5114 dprintk("nfs: server returned giant symlink!\n");
5115 return -ENAMETOOLONG;
5116 }
5117 recvd = xdr_read_pages(xdr, len);
5118 if (recvd < len) {
5119 dprintk("NFS: server cheating in readlink reply: "
5120 "count %u > recvd %u\n", len, recvd);
5121 return -EIO;
5122 }
5123 /*
5124 * The XDR encode routine has set things up so that
5125 * the link text will be copied directly into the
5126 * buffer. We just have to do overflow-checking,
5127 * and and null-terminate the text (the VFS expects
5128 * null-termination).
5129 */
5130 xdr_terminate_string(rcvbuf, len);
5131 return 0;
5132 out_overflow:
5133 print_overflow_msg(__func__, xdr);
5134 return -EIO;
5135 }
5136
decode_remove(struct xdr_stream * xdr,struct nfs4_change_info * cinfo)5137 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5138 {
5139 int status;
5140
5141 status = decode_op_hdr(xdr, OP_REMOVE);
5142 if (status)
5143 goto out;
5144 status = decode_change_info(xdr, cinfo);
5145 out:
5146 return status;
5147 }
5148
decode_rename(struct xdr_stream * xdr,struct nfs4_change_info * old_cinfo,struct nfs4_change_info * new_cinfo)5149 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5150 struct nfs4_change_info *new_cinfo)
5151 {
5152 int status;
5153
5154 status = decode_op_hdr(xdr, OP_RENAME);
5155 if (status)
5156 goto out;
5157 if ((status = decode_change_info(xdr, old_cinfo)))
5158 goto out;
5159 status = decode_change_info(xdr, new_cinfo);
5160 out:
5161 return status;
5162 }
5163
decode_renew(struct xdr_stream * xdr)5164 static int decode_renew(struct xdr_stream *xdr)
5165 {
5166 return decode_op_hdr(xdr, OP_RENEW);
5167 }
5168
5169 static int
decode_restorefh(struct xdr_stream * xdr)5170 decode_restorefh(struct xdr_stream *xdr)
5171 {
5172 return decode_op_hdr(xdr, OP_RESTOREFH);
5173 }
5174
decode_getacl(struct xdr_stream * xdr,struct rpc_rqst * req,struct nfs_getaclres * res)5175 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5176 struct nfs_getaclres *res)
5177 {
5178 unsigned int savep;
5179 uint32_t attrlen,
5180 bitmap[3] = {0};
5181 int status;
5182 unsigned int pg_offset;
5183
5184 res->acl_len = 0;
5185 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5186 goto out;
5187
5188 xdr_enter_page(xdr, xdr->buf->page_len);
5189
5190 /* Calculate the offset of the page data */
5191 pg_offset = xdr->buf->head[0].iov_len;
5192
5193 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5194 goto out;
5195 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5196 goto out;
5197
5198 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5199 return -EIO;
5200 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5201
5202 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5203 * are stored with the acl data to handle the problem of
5204 * variable length bitmaps.*/
5205 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5206 res->acl_len = attrlen;
5207
5208 /* Check for receive buffer overflow */
5209 if (res->acl_len > (xdr->nwords << 2) ||
5210 res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5211 res->acl_flags |= NFS4_ACL_TRUNC;
5212 dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5213 attrlen, xdr->nwords << 2);
5214 }
5215 } else
5216 status = -EOPNOTSUPP;
5217
5218 out:
5219 return status;
5220 }
5221
5222 static int
decode_savefh(struct xdr_stream * xdr)5223 decode_savefh(struct xdr_stream *xdr)
5224 {
5225 return decode_op_hdr(xdr, OP_SAVEFH);
5226 }
5227
decode_setattr(struct xdr_stream * xdr)5228 static int decode_setattr(struct xdr_stream *xdr)
5229 {
5230 __be32 *p;
5231 uint32_t bmlen;
5232 int status;
5233
5234 status = decode_op_hdr(xdr, OP_SETATTR);
5235 if (status)
5236 return status;
5237 p = xdr_inline_decode(xdr, 4);
5238 if (unlikely(!p))
5239 goto out_overflow;
5240 bmlen = be32_to_cpup(p);
5241 p = xdr_inline_decode(xdr, bmlen << 2);
5242 if (likely(p))
5243 return 0;
5244 out_overflow:
5245 print_overflow_msg(__func__, xdr);
5246 return -EIO;
5247 }
5248
decode_setclientid(struct xdr_stream * xdr,struct nfs4_setclientid_res * res)5249 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5250 {
5251 __be32 *p;
5252 uint32_t opnum;
5253 int32_t nfserr;
5254
5255 p = xdr_inline_decode(xdr, 8);
5256 if (unlikely(!p))
5257 goto out_overflow;
5258 opnum = be32_to_cpup(p++);
5259 if (opnum != OP_SETCLIENTID) {
5260 dprintk("nfs: decode_setclientid: Server returned operation"
5261 " %d\n", opnum);
5262 return -EIO;
5263 }
5264 nfserr = be32_to_cpup(p);
5265 if (nfserr == NFS_OK) {
5266 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5267 if (unlikely(!p))
5268 goto out_overflow;
5269 p = xdr_decode_hyper(p, &res->clientid);
5270 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5271 } else if (nfserr == NFSERR_CLID_INUSE) {
5272 uint32_t len;
5273
5274 /* skip netid string */
5275 p = xdr_inline_decode(xdr, 4);
5276 if (unlikely(!p))
5277 goto out_overflow;
5278 len = be32_to_cpup(p);
5279 p = xdr_inline_decode(xdr, len);
5280 if (unlikely(!p))
5281 goto out_overflow;
5282
5283 /* skip uaddr string */
5284 p = xdr_inline_decode(xdr, 4);
5285 if (unlikely(!p))
5286 goto out_overflow;
5287 len = be32_to_cpup(p);
5288 p = xdr_inline_decode(xdr, len);
5289 if (unlikely(!p))
5290 goto out_overflow;
5291 return -NFSERR_CLID_INUSE;
5292 } else
5293 return nfs4_stat_to_errno(nfserr);
5294
5295 return 0;
5296 out_overflow:
5297 print_overflow_msg(__func__, xdr);
5298 return -EIO;
5299 }
5300
decode_setclientid_confirm(struct xdr_stream * xdr)5301 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5302 {
5303 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5304 }
5305
decode_write(struct xdr_stream * xdr,struct nfs_pgio_res * res)5306 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5307 {
5308 __be32 *p;
5309 int status;
5310
5311 status = decode_op_hdr(xdr, OP_WRITE);
5312 if (status)
5313 return status;
5314
5315 p = xdr_inline_decode(xdr, 8);
5316 if (unlikely(!p))
5317 goto out_overflow;
5318 res->count = be32_to_cpup(p++);
5319 res->verf->committed = be32_to_cpup(p++);
5320 return decode_write_verifier(xdr, &res->verf->verifier);
5321 out_overflow:
5322 print_overflow_msg(__func__, xdr);
5323 return -EIO;
5324 }
5325
decode_delegreturn(struct xdr_stream * xdr)5326 static int decode_delegreturn(struct xdr_stream *xdr)
5327 {
5328 return decode_op_hdr(xdr, OP_DELEGRETURN);
5329 }
5330
decode_secinfo_gss(struct xdr_stream * xdr,struct nfs4_secinfo4 * flavor)5331 static int decode_secinfo_gss(struct xdr_stream *xdr,
5332 struct nfs4_secinfo4 *flavor)
5333 {
5334 u32 oid_len;
5335 __be32 *p;
5336
5337 p = xdr_inline_decode(xdr, 4);
5338 if (unlikely(!p))
5339 goto out_overflow;
5340 oid_len = be32_to_cpup(p);
5341 if (oid_len > GSS_OID_MAX_LEN)
5342 goto out_err;
5343
5344 p = xdr_inline_decode(xdr, oid_len);
5345 if (unlikely(!p))
5346 goto out_overflow;
5347 memcpy(flavor->flavor_info.oid.data, p, oid_len);
5348 flavor->flavor_info.oid.len = oid_len;
5349
5350 p = xdr_inline_decode(xdr, 8);
5351 if (unlikely(!p))
5352 goto out_overflow;
5353 flavor->flavor_info.qop = be32_to_cpup(p++);
5354 flavor->flavor_info.service = be32_to_cpup(p);
5355
5356 return 0;
5357
5358 out_overflow:
5359 print_overflow_msg(__func__, xdr);
5360 return -EIO;
5361 out_err:
5362 return -EINVAL;
5363 }
5364
decode_secinfo_common(struct xdr_stream * xdr,struct nfs4_secinfo_res * res)5365 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5366 {
5367 struct nfs4_secinfo4 *sec_flavor;
5368 unsigned int i, num_flavors;
5369 int status;
5370 __be32 *p;
5371
5372 p = xdr_inline_decode(xdr, 4);
5373 if (unlikely(!p))
5374 goto out_overflow;
5375
5376 res->flavors->num_flavors = 0;
5377 num_flavors = be32_to_cpup(p);
5378
5379 for (i = 0; i < num_flavors; i++) {
5380 sec_flavor = &res->flavors->flavors[i];
5381 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5382 break;
5383
5384 p = xdr_inline_decode(xdr, 4);
5385 if (unlikely(!p))
5386 goto out_overflow;
5387 sec_flavor->flavor = be32_to_cpup(p);
5388
5389 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5390 status = decode_secinfo_gss(xdr, sec_flavor);
5391 if (status)
5392 goto out;
5393 }
5394 res->flavors->num_flavors++;
5395 }
5396
5397 status = 0;
5398 out:
5399 return status;
5400 out_overflow:
5401 print_overflow_msg(__func__, xdr);
5402 return -EIO;
5403 }
5404
decode_secinfo(struct xdr_stream * xdr,struct nfs4_secinfo_res * res)5405 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5406 {
5407 int status = decode_op_hdr(xdr, OP_SECINFO);
5408 if (status)
5409 return status;
5410 return decode_secinfo_common(xdr, res);
5411 }
5412
5413 #if defined(CONFIG_NFS_V4_1)
decode_secinfo_no_name(struct xdr_stream * xdr,struct nfs4_secinfo_res * res)5414 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5415 {
5416 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5417 if (status)
5418 return status;
5419 return decode_secinfo_common(xdr, res);
5420 }
5421
decode_op_map(struct xdr_stream * xdr,struct nfs4_op_map * op_map)5422 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5423 {
5424 __be32 *p;
5425 uint32_t bitmap_words;
5426 unsigned int i;
5427
5428 p = xdr_inline_decode(xdr, 4);
5429 bitmap_words = be32_to_cpup(p++);
5430 if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5431 return -EIO;
5432 p = xdr_inline_decode(xdr, 4 * bitmap_words);
5433 for (i = 0; i < bitmap_words; i++)
5434 op_map->u.words[i] = be32_to_cpup(p++);
5435
5436 return 0;
5437 }
5438
decode_exchange_id(struct xdr_stream * xdr,struct nfs41_exchange_id_res * res)5439 static int decode_exchange_id(struct xdr_stream *xdr,
5440 struct nfs41_exchange_id_res *res)
5441 {
5442 __be32 *p;
5443 uint32_t dummy;
5444 char *dummy_str;
5445 int status;
5446 uint32_t impl_id_count;
5447
5448 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5449 if (status)
5450 return status;
5451
5452 p = xdr_inline_decode(xdr, 8);
5453 if (unlikely(!p))
5454 goto out_overflow;
5455 xdr_decode_hyper(p, &res->clientid);
5456 p = xdr_inline_decode(xdr, 12);
5457 if (unlikely(!p))
5458 goto out_overflow;
5459 res->seqid = be32_to_cpup(p++);
5460 res->flags = be32_to_cpup(p++);
5461
5462 res->state_protect.how = be32_to_cpup(p);
5463 switch (res->state_protect.how) {
5464 case SP4_NONE:
5465 break;
5466 case SP4_MACH_CRED:
5467 status = decode_op_map(xdr, &res->state_protect.enforce);
5468 if (status)
5469 return status;
5470 status = decode_op_map(xdr, &res->state_protect.allow);
5471 if (status)
5472 return status;
5473 break;
5474 default:
5475 WARN_ON_ONCE(1);
5476 return -EIO;
5477 }
5478
5479 /* server_owner4.so_minor_id */
5480 p = xdr_inline_decode(xdr, 8);
5481 if (unlikely(!p))
5482 goto out_overflow;
5483 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5484
5485 /* server_owner4.so_major_id */
5486 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5487 if (unlikely(status))
5488 return status;
5489 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5490 return -EIO;
5491 memcpy(res->server_owner->major_id, dummy_str, dummy);
5492 res->server_owner->major_id_sz = dummy;
5493
5494 /* server_scope4 */
5495 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5496 if (unlikely(status))
5497 return status;
5498 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5499 return -EIO;
5500 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5501 res->server_scope->server_scope_sz = dummy;
5502
5503 /* Implementation Id */
5504 p = xdr_inline_decode(xdr, 4);
5505 if (unlikely(!p))
5506 goto out_overflow;
5507 impl_id_count = be32_to_cpup(p++);
5508
5509 if (impl_id_count) {
5510 /* nii_domain */
5511 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5512 if (unlikely(status))
5513 return status;
5514 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5515 return -EIO;
5516 memcpy(res->impl_id->domain, dummy_str, dummy);
5517
5518 /* nii_name */
5519 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5520 if (unlikely(status))
5521 return status;
5522 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5523 return -EIO;
5524 memcpy(res->impl_id->name, dummy_str, dummy);
5525
5526 /* nii_date */
5527 p = xdr_inline_decode(xdr, 12);
5528 if (unlikely(!p))
5529 goto out_overflow;
5530 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5531 res->impl_id->date.nseconds = be32_to_cpup(p);
5532
5533 /* if there's more than one entry, ignore the rest */
5534 }
5535 return 0;
5536 out_overflow:
5537 print_overflow_msg(__func__, xdr);
5538 return -EIO;
5539 }
5540
decode_chan_attrs(struct xdr_stream * xdr,struct nfs4_channel_attrs * attrs)5541 static int decode_chan_attrs(struct xdr_stream *xdr,
5542 struct nfs4_channel_attrs *attrs)
5543 {
5544 __be32 *p;
5545 u32 nr_attrs, val;
5546
5547 p = xdr_inline_decode(xdr, 28);
5548 if (unlikely(!p))
5549 goto out_overflow;
5550 val = be32_to_cpup(p++); /* headerpadsz */
5551 if (val)
5552 return -EINVAL; /* no support for header padding yet */
5553 attrs->max_rqst_sz = be32_to_cpup(p++);
5554 attrs->max_resp_sz = be32_to_cpup(p++);
5555 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5556 attrs->max_ops = be32_to_cpup(p++);
5557 attrs->max_reqs = be32_to_cpup(p++);
5558 nr_attrs = be32_to_cpup(p);
5559 if (unlikely(nr_attrs > 1)) {
5560 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5561 "count %u\n", __func__, nr_attrs);
5562 return -EINVAL;
5563 }
5564 if (nr_attrs == 1) {
5565 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5566 if (unlikely(!p))
5567 goto out_overflow;
5568 }
5569 return 0;
5570 out_overflow:
5571 print_overflow_msg(__func__, xdr);
5572 return -EIO;
5573 }
5574
decode_sessionid(struct xdr_stream * xdr,struct nfs4_sessionid * sid)5575 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5576 {
5577 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5578 }
5579
decode_bind_conn_to_session(struct xdr_stream * xdr,struct nfs41_bind_conn_to_session_res * res)5580 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5581 struct nfs41_bind_conn_to_session_res *res)
5582 {
5583 __be32 *p;
5584 int status;
5585
5586 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5587 if (!status)
5588 status = decode_sessionid(xdr, &res->session->sess_id);
5589 if (unlikely(status))
5590 return status;
5591
5592 /* dir flags, rdma mode bool */
5593 p = xdr_inline_decode(xdr, 8);
5594 if (unlikely(!p))
5595 goto out_overflow;
5596
5597 res->dir = be32_to_cpup(p++);
5598 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5599 return -EIO;
5600 if (be32_to_cpup(p) == 0)
5601 res->use_conn_in_rdma_mode = false;
5602 else
5603 res->use_conn_in_rdma_mode = true;
5604
5605 return 0;
5606 out_overflow:
5607 print_overflow_msg(__func__, xdr);
5608 return -EIO;
5609 }
5610
decode_create_session(struct xdr_stream * xdr,struct nfs41_create_session_res * res)5611 static int decode_create_session(struct xdr_stream *xdr,
5612 struct nfs41_create_session_res *res)
5613 {
5614 __be32 *p;
5615 int status;
5616 struct nfs_client *clp = res->client;
5617 struct nfs4_session *session = clp->cl_session;
5618
5619 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5620 if (!status)
5621 status = decode_sessionid(xdr, &session->sess_id);
5622 if (unlikely(status))
5623 return status;
5624
5625 /* seqid, flags */
5626 p = xdr_inline_decode(xdr, 8);
5627 if (unlikely(!p))
5628 goto out_overflow;
5629 clp->cl_seqid = be32_to_cpup(p++);
5630 session->flags = be32_to_cpup(p);
5631
5632 /* Channel attributes */
5633 status = decode_chan_attrs(xdr, &session->fc_attrs);
5634 if (!status)
5635 status = decode_chan_attrs(xdr, &session->bc_attrs);
5636 return status;
5637 out_overflow:
5638 print_overflow_msg(__func__, xdr);
5639 return -EIO;
5640 }
5641
decode_destroy_session(struct xdr_stream * xdr,void * dummy)5642 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5643 {
5644 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5645 }
5646
decode_destroy_clientid(struct xdr_stream * xdr,void * dummy)5647 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5648 {
5649 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5650 }
5651
decode_reclaim_complete(struct xdr_stream * xdr,void * dummy)5652 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5653 {
5654 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5655 }
5656 #endif /* CONFIG_NFS_V4_1 */
5657
decode_sequence(struct xdr_stream * xdr,struct nfs4_sequence_res * res,struct rpc_rqst * rqstp)5658 static int decode_sequence(struct xdr_stream *xdr,
5659 struct nfs4_sequence_res *res,
5660 struct rpc_rqst *rqstp)
5661 {
5662 #if defined(CONFIG_NFS_V4_1)
5663 struct nfs4_session *session;
5664 struct nfs4_sessionid id;
5665 u32 dummy;
5666 int status;
5667 __be32 *p;
5668
5669 if (res->sr_slot == NULL)
5670 return 0;
5671 if (!res->sr_slot->table->session)
5672 return 0;
5673
5674 status = decode_op_hdr(xdr, OP_SEQUENCE);
5675 if (!status)
5676 status = decode_sessionid(xdr, &id);
5677 if (unlikely(status))
5678 goto out_err;
5679
5680 /*
5681 * If the server returns different values for sessionID, slotID or
5682 * sequence number, the server is looney tunes.
5683 */
5684 status = -EREMOTEIO;
5685 session = res->sr_slot->table->session;
5686
5687 if (memcmp(id.data, session->sess_id.data,
5688 NFS4_MAX_SESSIONID_LEN)) {
5689 dprintk("%s Invalid session id\n", __func__);
5690 goto out_err;
5691 }
5692
5693 p = xdr_inline_decode(xdr, 20);
5694 if (unlikely(!p))
5695 goto out_overflow;
5696
5697 /* seqid */
5698 dummy = be32_to_cpup(p++);
5699 if (dummy != res->sr_slot->seq_nr) {
5700 dprintk("%s Invalid sequence number\n", __func__);
5701 goto out_err;
5702 }
5703 /* slot id */
5704 dummy = be32_to_cpup(p++);
5705 if (dummy != res->sr_slot->slot_nr) {
5706 dprintk("%s Invalid slot id\n", __func__);
5707 goto out_err;
5708 }
5709 /* highest slot id */
5710 res->sr_highest_slotid = be32_to_cpup(p++);
5711 /* target highest slot id */
5712 res->sr_target_highest_slotid = be32_to_cpup(p++);
5713 /* result flags */
5714 res->sr_status_flags = be32_to_cpup(p);
5715 status = 0;
5716 out_err:
5717 res->sr_status = status;
5718 return status;
5719 out_overflow:
5720 print_overflow_msg(__func__, xdr);
5721 status = -EIO;
5722 goto out_err;
5723 #else /* CONFIG_NFS_V4_1 */
5724 return 0;
5725 #endif /* CONFIG_NFS_V4_1 */
5726 }
5727
5728 #if defined(CONFIG_NFS_V4_1)
decode_getdeviceinfo(struct xdr_stream * xdr,struct pnfs_device * pdev)5729 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5730 struct pnfs_device *pdev)
5731 {
5732 __be32 *p;
5733 uint32_t len, type;
5734 int status;
5735
5736 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5737 if (status) {
5738 if (status == -ETOOSMALL) {
5739 p = xdr_inline_decode(xdr, 4);
5740 if (unlikely(!p))
5741 goto out_overflow;
5742 pdev->mincount = be32_to_cpup(p);
5743 dprintk("%s: Min count too small. mincnt = %u\n",
5744 __func__, pdev->mincount);
5745 }
5746 return status;
5747 }
5748
5749 p = xdr_inline_decode(xdr, 8);
5750 if (unlikely(!p))
5751 goto out_overflow;
5752 type = be32_to_cpup(p++);
5753 if (type != pdev->layout_type) {
5754 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5755 __func__, pdev->layout_type, type);
5756 return -EINVAL;
5757 }
5758 /*
5759 * Get the length of the opaque device_addr4. xdr_read_pages places
5760 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5761 * and places the remaining xdr data in xdr_buf->tail
5762 */
5763 pdev->mincount = be32_to_cpup(p);
5764 if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5765 goto out_overflow;
5766
5767 /* Parse notification bitmap, verifying that it is zero. */
5768 p = xdr_inline_decode(xdr, 4);
5769 if (unlikely(!p))
5770 goto out_overflow;
5771 len = be32_to_cpup(p);
5772 if (len) {
5773 uint32_t i;
5774
5775 p = xdr_inline_decode(xdr, 4 * len);
5776 if (unlikely(!p))
5777 goto out_overflow;
5778
5779 if (be32_to_cpup(p++) &
5780 ~(NOTIFY_DEVICEID4_CHANGE | NOTIFY_DEVICEID4_DELETE)) {
5781 dprintk("%s: unsupported notification\n",
5782 __func__);
5783 }
5784
5785 for (i = 1; i < len; i++) {
5786 if (be32_to_cpup(p++)) {
5787 dprintk("%s: unsupported notification\n",
5788 __func__);
5789 return -EIO;
5790 }
5791 }
5792 }
5793 return 0;
5794 out_overflow:
5795 print_overflow_msg(__func__, xdr);
5796 return -EIO;
5797 }
5798
decode_layoutget(struct xdr_stream * xdr,struct rpc_rqst * req,struct nfs4_layoutget_res * res)5799 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5800 struct nfs4_layoutget_res *res)
5801 {
5802 __be32 *p;
5803 int status;
5804 u32 layout_count;
5805 u32 recvd;
5806
5807 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5808 if (status)
5809 return status;
5810 p = xdr_inline_decode(xdr, 4);
5811 if (unlikely(!p))
5812 goto out_overflow;
5813 res->return_on_close = be32_to_cpup(p);
5814 decode_stateid(xdr, &res->stateid);
5815 p = xdr_inline_decode(xdr, 4);
5816 if (unlikely(!p))
5817 goto out_overflow;
5818 layout_count = be32_to_cpup(p);
5819 if (!layout_count) {
5820 dprintk("%s: server responded with empty layout array\n",
5821 __func__);
5822 return -EINVAL;
5823 }
5824
5825 p = xdr_inline_decode(xdr, 28);
5826 if (unlikely(!p))
5827 goto out_overflow;
5828 p = xdr_decode_hyper(p, &res->range.offset);
5829 p = xdr_decode_hyper(p, &res->range.length);
5830 res->range.iomode = be32_to_cpup(p++);
5831 res->type = be32_to_cpup(p++);
5832 res->layoutp->len = be32_to_cpup(p);
5833
5834 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5835 __func__,
5836 (unsigned long)res->range.offset,
5837 (unsigned long)res->range.length,
5838 res->range.iomode,
5839 res->type,
5840 res->layoutp->len);
5841
5842 recvd = xdr_read_pages(xdr, res->layoutp->len);
5843 if (res->layoutp->len > recvd) {
5844 dprintk("NFS: server cheating in layoutget reply: "
5845 "layout len %u > recvd %u\n",
5846 res->layoutp->len, recvd);
5847 return -EINVAL;
5848 }
5849
5850 if (layout_count > 1) {
5851 /* We only handle a length one array at the moment. Any
5852 * further entries are just ignored. Note that this means
5853 * the client may see a response that is less than the
5854 * minimum it requested.
5855 */
5856 dprintk("%s: server responded with %d layouts, dropping tail\n",
5857 __func__, layout_count);
5858 }
5859
5860 return 0;
5861 out_overflow:
5862 print_overflow_msg(__func__, xdr);
5863 return -EIO;
5864 }
5865
decode_layoutreturn(struct xdr_stream * xdr,struct nfs4_layoutreturn_res * res)5866 static int decode_layoutreturn(struct xdr_stream *xdr,
5867 struct nfs4_layoutreturn_res *res)
5868 {
5869 __be32 *p;
5870 int status;
5871
5872 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5873 if (status)
5874 return status;
5875 p = xdr_inline_decode(xdr, 4);
5876 if (unlikely(!p))
5877 goto out_overflow;
5878 res->lrs_present = be32_to_cpup(p);
5879 if (res->lrs_present)
5880 status = decode_stateid(xdr, &res->stateid);
5881 return status;
5882 out_overflow:
5883 print_overflow_msg(__func__, xdr);
5884 return -EIO;
5885 }
5886
decode_layoutcommit(struct xdr_stream * xdr,struct rpc_rqst * req,struct nfs4_layoutcommit_res * res)5887 static int decode_layoutcommit(struct xdr_stream *xdr,
5888 struct rpc_rqst *req,
5889 struct nfs4_layoutcommit_res *res)
5890 {
5891 __be32 *p;
5892 __u32 sizechanged;
5893 int status;
5894
5895 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5896 res->status = status;
5897 if (status)
5898 return status;
5899
5900 p = xdr_inline_decode(xdr, 4);
5901 if (unlikely(!p))
5902 goto out_overflow;
5903 sizechanged = be32_to_cpup(p);
5904
5905 if (sizechanged) {
5906 /* throw away new size */
5907 p = xdr_inline_decode(xdr, 8);
5908 if (unlikely(!p))
5909 goto out_overflow;
5910 }
5911 return 0;
5912 out_overflow:
5913 print_overflow_msg(__func__, xdr);
5914 return -EIO;
5915 }
5916
decode_test_stateid(struct xdr_stream * xdr,struct nfs41_test_stateid_res * res)5917 static int decode_test_stateid(struct xdr_stream *xdr,
5918 struct nfs41_test_stateid_res *res)
5919 {
5920 __be32 *p;
5921 int status;
5922 int num_res;
5923
5924 status = decode_op_hdr(xdr, OP_TEST_STATEID);
5925 if (status)
5926 return status;
5927
5928 p = xdr_inline_decode(xdr, 4);
5929 if (unlikely(!p))
5930 goto out_overflow;
5931 num_res = be32_to_cpup(p++);
5932 if (num_res != 1)
5933 goto out;
5934
5935 p = xdr_inline_decode(xdr, 4);
5936 if (unlikely(!p))
5937 goto out_overflow;
5938 res->status = be32_to_cpup(p++);
5939
5940 return status;
5941 out_overflow:
5942 print_overflow_msg(__func__, xdr);
5943 out:
5944 return -EIO;
5945 }
5946
decode_free_stateid(struct xdr_stream * xdr,struct nfs41_free_stateid_res * res)5947 static int decode_free_stateid(struct xdr_stream *xdr,
5948 struct nfs41_free_stateid_res *res)
5949 {
5950 res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
5951 return res->status;
5952 }
5953 #endif /* CONFIG_NFS_V4_1 */
5954
5955 /*
5956 * END OF "GENERIC" DECODE ROUTINES.
5957 */
5958
5959 /*
5960 * Decode OPEN_DOWNGRADE response
5961 */
nfs4_xdr_dec_open_downgrade(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs_closeres * res)5962 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5963 struct xdr_stream *xdr,
5964 struct nfs_closeres *res)
5965 {
5966 struct compound_hdr hdr;
5967 int status;
5968
5969 status = decode_compound_hdr(xdr, &hdr);
5970 if (status)
5971 goto out;
5972 status = decode_sequence(xdr, &res->seq_res, rqstp);
5973 if (status)
5974 goto out;
5975 status = decode_putfh(xdr);
5976 if (status)
5977 goto out;
5978 status = decode_open_downgrade(xdr, res);
5979 if (status != 0)
5980 goto out;
5981 decode_getfattr(xdr, res->fattr, res->server);
5982 out:
5983 return status;
5984 }
5985
5986 /*
5987 * Decode ACCESS response
5988 */
nfs4_xdr_dec_access(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs4_accessres * res)5989 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5990 struct nfs4_accessres *res)
5991 {
5992 struct compound_hdr hdr;
5993 int status;
5994
5995 status = decode_compound_hdr(xdr, &hdr);
5996 if (status)
5997 goto out;
5998 status = decode_sequence(xdr, &res->seq_res, rqstp);
5999 if (status)
6000 goto out;
6001 status = decode_putfh(xdr);
6002 if (status != 0)
6003 goto out;
6004 status = decode_access(xdr, &res->supported, &res->access);
6005 if (status != 0)
6006 goto out;
6007 decode_getfattr(xdr, res->fattr, res->server);
6008 out:
6009 return status;
6010 }
6011
6012 /*
6013 * Decode LOOKUP response
6014 */
nfs4_xdr_dec_lookup(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs4_lookup_res * res)6015 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6016 struct nfs4_lookup_res *res)
6017 {
6018 struct compound_hdr hdr;
6019 int status;
6020
6021 status = decode_compound_hdr(xdr, &hdr);
6022 if (status)
6023 goto out;
6024 status = decode_sequence(xdr, &res->seq_res, rqstp);
6025 if (status)
6026 goto out;
6027 status = decode_putfh(xdr);
6028 if (status)
6029 goto out;
6030 status = decode_lookup(xdr);
6031 if (status)
6032 goto out;
6033 status = decode_getfh(xdr, res->fh);
6034 if (status)
6035 goto out;
6036 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6037 out:
6038 return status;
6039 }
6040
6041 /*
6042 * Decode LOOKUP_ROOT response
6043 */
nfs4_xdr_dec_lookup_root(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs4_lookup_res * res)6044 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6045 struct xdr_stream *xdr,
6046 struct nfs4_lookup_res *res)
6047 {
6048 struct compound_hdr hdr;
6049 int status;
6050
6051 status = decode_compound_hdr(xdr, &hdr);
6052 if (status)
6053 goto out;
6054 status = decode_sequence(xdr, &res->seq_res, rqstp);
6055 if (status)
6056 goto out;
6057 status = decode_putrootfh(xdr);
6058 if (status)
6059 goto out;
6060 status = decode_getfh(xdr, res->fh);
6061 if (status == 0)
6062 status = decode_getfattr_label(xdr, res->fattr,
6063 res->label, res->server);
6064 out:
6065 return status;
6066 }
6067
6068 /*
6069 * Decode REMOVE response
6070 */
nfs4_xdr_dec_remove(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs_removeres * res)6071 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6072 struct nfs_removeres *res)
6073 {
6074 struct compound_hdr hdr;
6075 int status;
6076
6077 status = decode_compound_hdr(xdr, &hdr);
6078 if (status)
6079 goto out;
6080 status = decode_sequence(xdr, &res->seq_res, rqstp);
6081 if (status)
6082 goto out;
6083 status = decode_putfh(xdr);
6084 if (status)
6085 goto out;
6086 status = decode_remove(xdr, &res->cinfo);
6087 out:
6088 return status;
6089 }
6090
6091 /*
6092 * Decode RENAME response
6093 */
nfs4_xdr_dec_rename(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs_renameres * res)6094 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6095 struct nfs_renameres *res)
6096 {
6097 struct compound_hdr hdr;
6098 int status;
6099
6100 status = decode_compound_hdr(xdr, &hdr);
6101 if (status)
6102 goto out;
6103 status = decode_sequence(xdr, &res->seq_res, rqstp);
6104 if (status)
6105 goto out;
6106 status = decode_putfh(xdr);
6107 if (status)
6108 goto out;
6109 status = decode_savefh(xdr);
6110 if (status)
6111 goto out;
6112 status = decode_putfh(xdr);
6113 if (status)
6114 goto out;
6115 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6116 out:
6117 return status;
6118 }
6119
6120 /*
6121 * Decode LINK response
6122 */
nfs4_xdr_dec_link(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs4_link_res * res)6123 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6124 struct nfs4_link_res *res)
6125 {
6126 struct compound_hdr hdr;
6127 int status;
6128
6129 status = decode_compound_hdr(xdr, &hdr);
6130 if (status)
6131 goto out;
6132 status = decode_sequence(xdr, &res->seq_res, rqstp);
6133 if (status)
6134 goto out;
6135 status = decode_putfh(xdr);
6136 if (status)
6137 goto out;
6138 status = decode_savefh(xdr);
6139 if (status)
6140 goto out;
6141 status = decode_putfh(xdr);
6142 if (status)
6143 goto out;
6144 status = decode_link(xdr, &res->cinfo);
6145 if (status)
6146 goto out;
6147 /*
6148 * Note order: OP_LINK leaves the directory as the current
6149 * filehandle.
6150 */
6151 status = decode_restorefh(xdr);
6152 if (status)
6153 goto out;
6154 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6155 out:
6156 return status;
6157 }
6158
6159 /*
6160 * Decode CREATE response
6161 */
nfs4_xdr_dec_create(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs4_create_res * res)6162 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6163 struct nfs4_create_res *res)
6164 {
6165 struct compound_hdr hdr;
6166 int status;
6167
6168 status = decode_compound_hdr(xdr, &hdr);
6169 if (status)
6170 goto out;
6171 status = decode_sequence(xdr, &res->seq_res, rqstp);
6172 if (status)
6173 goto out;
6174 status = decode_putfh(xdr);
6175 if (status)
6176 goto out;
6177 status = decode_create(xdr, &res->dir_cinfo);
6178 if (status)
6179 goto out;
6180 status = decode_getfh(xdr, res->fh);
6181 if (status)
6182 goto out;
6183 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6184 out:
6185 return status;
6186 }
6187
6188 /*
6189 * Decode SYMLINK response
6190 */
nfs4_xdr_dec_symlink(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs4_create_res * res)6191 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6192 struct nfs4_create_res *res)
6193 {
6194 return nfs4_xdr_dec_create(rqstp, xdr, res);
6195 }
6196
6197 /*
6198 * Decode GETATTR response
6199 */
nfs4_xdr_dec_getattr(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs4_getattr_res * res)6200 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6201 struct nfs4_getattr_res *res)
6202 {
6203 struct compound_hdr hdr;
6204 int status;
6205
6206 status = decode_compound_hdr(xdr, &hdr);
6207 if (status)
6208 goto out;
6209 status = decode_sequence(xdr, &res->seq_res, rqstp);
6210 if (status)
6211 goto out;
6212 status = decode_putfh(xdr);
6213 if (status)
6214 goto out;
6215 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6216 out:
6217 return status;
6218 }
6219
6220 /*
6221 * Encode an SETACL request
6222 */
nfs4_xdr_enc_setacl(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs_setaclargs * args)6223 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6224 struct nfs_setaclargs *args)
6225 {
6226 struct compound_hdr hdr = {
6227 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6228 };
6229
6230 encode_compound_hdr(xdr, req, &hdr);
6231 encode_sequence(xdr, &args->seq_args, &hdr);
6232 encode_putfh(xdr, args->fh, &hdr);
6233 encode_setacl(xdr, args, &hdr);
6234 encode_nops(&hdr);
6235 }
6236
6237 /*
6238 * Decode SETACL response
6239 */
6240 static int
nfs4_xdr_dec_setacl(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs_setaclres * res)6241 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6242 struct nfs_setaclres *res)
6243 {
6244 struct compound_hdr hdr;
6245 int status;
6246
6247 status = decode_compound_hdr(xdr, &hdr);
6248 if (status)
6249 goto out;
6250 status = decode_sequence(xdr, &res->seq_res, rqstp);
6251 if (status)
6252 goto out;
6253 status = decode_putfh(xdr);
6254 if (status)
6255 goto out;
6256 status = decode_setattr(xdr);
6257 out:
6258 return status;
6259 }
6260
6261 /*
6262 * Decode GETACL response
6263 */
6264 static int
nfs4_xdr_dec_getacl(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs_getaclres * res)6265 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6266 struct nfs_getaclres *res)
6267 {
6268 struct compound_hdr hdr;
6269 int status;
6270
6271 if (res->acl_scratch != NULL) {
6272 void *p = page_address(res->acl_scratch);
6273 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6274 }
6275 status = decode_compound_hdr(xdr, &hdr);
6276 if (status)
6277 goto out;
6278 status = decode_sequence(xdr, &res->seq_res, rqstp);
6279 if (status)
6280 goto out;
6281 status = decode_putfh(xdr);
6282 if (status)
6283 goto out;
6284 status = decode_getacl(xdr, rqstp, res);
6285
6286 out:
6287 return status;
6288 }
6289
6290 /*
6291 * Decode CLOSE response
6292 */
nfs4_xdr_dec_close(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs_closeres * res)6293 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6294 struct nfs_closeres *res)
6295 {
6296 struct compound_hdr hdr;
6297 int status;
6298
6299 status = decode_compound_hdr(xdr, &hdr);
6300 if (status)
6301 goto out;
6302 status = decode_sequence(xdr, &res->seq_res, rqstp);
6303 if (status)
6304 goto out;
6305 status = decode_putfh(xdr);
6306 if (status)
6307 goto out;
6308 status = decode_close(xdr, res);
6309 if (status != 0)
6310 goto out;
6311 /*
6312 * Note: Server may do delete on close for this file
6313 * in which case the getattr call will fail with
6314 * an ESTALE error. Shouldn't be a problem,
6315 * though, since fattr->valid will remain unset.
6316 */
6317 decode_getfattr(xdr, res->fattr, res->server);
6318 out:
6319 return status;
6320 }
6321
6322 /*
6323 * Decode OPEN response
6324 */
nfs4_xdr_dec_open(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs_openres * res)6325 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6326 struct nfs_openres *res)
6327 {
6328 struct compound_hdr hdr;
6329 int status;
6330
6331 status = decode_compound_hdr(xdr, &hdr);
6332 if (status)
6333 goto out;
6334 status = decode_sequence(xdr, &res->seq_res, rqstp);
6335 if (status)
6336 goto out;
6337 status = decode_putfh(xdr);
6338 if (status)
6339 goto out;
6340 status = decode_open(xdr, res);
6341 if (status)
6342 goto out;
6343 status = decode_getfh(xdr, &res->fh);
6344 if (status)
6345 goto out;
6346 if (res->access_request)
6347 decode_access(xdr, &res->access_supported, &res->access_result);
6348 decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6349 out:
6350 return status;
6351 }
6352
6353 /*
6354 * Decode OPEN_CONFIRM response
6355 */
nfs4_xdr_dec_open_confirm(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs_open_confirmres * res)6356 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6357 struct xdr_stream *xdr,
6358 struct nfs_open_confirmres *res)
6359 {
6360 struct compound_hdr hdr;
6361 int status;
6362
6363 status = decode_compound_hdr(xdr, &hdr);
6364 if (status)
6365 goto out;
6366 status = decode_putfh(xdr);
6367 if (status)
6368 goto out;
6369 status = decode_open_confirm(xdr, res);
6370 out:
6371 return status;
6372 }
6373
6374 /*
6375 * Decode OPEN response
6376 */
nfs4_xdr_dec_open_noattr(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs_openres * res)6377 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6378 struct xdr_stream *xdr,
6379 struct nfs_openres *res)
6380 {
6381 struct compound_hdr hdr;
6382 int status;
6383
6384 status = decode_compound_hdr(xdr, &hdr);
6385 if (status)
6386 goto out;
6387 status = decode_sequence(xdr, &res->seq_res, rqstp);
6388 if (status)
6389 goto out;
6390 status = decode_putfh(xdr);
6391 if (status)
6392 goto out;
6393 status = decode_open(xdr, res);
6394 if (status)
6395 goto out;
6396 if (res->access_request)
6397 decode_access(xdr, &res->access_supported, &res->access_result);
6398 decode_getfattr(xdr, res->f_attr, res->server);
6399 out:
6400 return status;
6401 }
6402
6403 /*
6404 * Decode SETATTR response
6405 */
nfs4_xdr_dec_setattr(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs_setattrres * res)6406 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6407 struct xdr_stream *xdr,
6408 struct nfs_setattrres *res)
6409 {
6410 struct compound_hdr hdr;
6411 int status;
6412
6413 status = decode_compound_hdr(xdr, &hdr);
6414 if (status)
6415 goto out;
6416 status = decode_sequence(xdr, &res->seq_res, rqstp);
6417 if (status)
6418 goto out;
6419 status = decode_putfh(xdr);
6420 if (status)
6421 goto out;
6422 status = decode_setattr(xdr);
6423 if (status)
6424 goto out;
6425 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6426 out:
6427 return status;
6428 }
6429
6430 /*
6431 * Decode LOCK response
6432 */
nfs4_xdr_dec_lock(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs_lock_res * res)6433 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6434 struct nfs_lock_res *res)
6435 {
6436 struct compound_hdr hdr;
6437 int status;
6438
6439 status = decode_compound_hdr(xdr, &hdr);
6440 if (status)
6441 goto out;
6442 status = decode_sequence(xdr, &res->seq_res, rqstp);
6443 if (status)
6444 goto out;
6445 status = decode_putfh(xdr);
6446 if (status)
6447 goto out;
6448 status = decode_lock(xdr, res);
6449 out:
6450 return status;
6451 }
6452
6453 /*
6454 * Decode LOCKT response
6455 */
nfs4_xdr_dec_lockt(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs_lockt_res * res)6456 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6457 struct nfs_lockt_res *res)
6458 {
6459 struct compound_hdr hdr;
6460 int status;
6461
6462 status = decode_compound_hdr(xdr, &hdr);
6463 if (status)
6464 goto out;
6465 status = decode_sequence(xdr, &res->seq_res, rqstp);
6466 if (status)
6467 goto out;
6468 status = decode_putfh(xdr);
6469 if (status)
6470 goto out;
6471 status = decode_lockt(xdr, res);
6472 out:
6473 return status;
6474 }
6475
6476 /*
6477 * Decode LOCKU response
6478 */
nfs4_xdr_dec_locku(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs_locku_res * res)6479 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6480 struct nfs_locku_res *res)
6481 {
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_locku(xdr, res);
6495 out:
6496 return status;
6497 }
6498
nfs4_xdr_dec_release_lockowner(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * dummy)6499 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6500 struct xdr_stream *xdr, void *dummy)
6501 {
6502 struct compound_hdr hdr;
6503 int status;
6504
6505 status = decode_compound_hdr(xdr, &hdr);
6506 if (!status)
6507 status = decode_release_lockowner(xdr);
6508 return status;
6509 }
6510
6511 /*
6512 * Decode READLINK response
6513 */
nfs4_xdr_dec_readlink(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs4_readlink_res * res)6514 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6515 struct xdr_stream *xdr,
6516 struct nfs4_readlink_res *res)
6517 {
6518 struct compound_hdr hdr;
6519 int status;
6520
6521 status = decode_compound_hdr(xdr, &hdr);
6522 if (status)
6523 goto out;
6524 status = decode_sequence(xdr, &res->seq_res, rqstp);
6525 if (status)
6526 goto out;
6527 status = decode_putfh(xdr);
6528 if (status)
6529 goto out;
6530 status = decode_readlink(xdr, rqstp);
6531 out:
6532 return status;
6533 }
6534
6535 /*
6536 * Decode READDIR response
6537 */
nfs4_xdr_dec_readdir(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs4_readdir_res * res)6538 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6539 struct nfs4_readdir_res *res)
6540 {
6541 struct compound_hdr hdr;
6542 int status;
6543
6544 status = decode_compound_hdr(xdr, &hdr);
6545 if (status)
6546 goto out;
6547 status = decode_sequence(xdr, &res->seq_res, rqstp);
6548 if (status)
6549 goto out;
6550 status = decode_putfh(xdr);
6551 if (status)
6552 goto out;
6553 status = decode_readdir(xdr, rqstp, res);
6554 out:
6555 return status;
6556 }
6557
6558 /*
6559 * Decode Read response
6560 */
nfs4_xdr_dec_read(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs_pgio_res * res)6561 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6562 struct nfs_pgio_res *res)
6563 {
6564 struct compound_hdr hdr;
6565 int status;
6566
6567 status = decode_compound_hdr(xdr, &hdr);
6568 if (status)
6569 goto out;
6570 status = decode_sequence(xdr, &res->seq_res, rqstp);
6571 if (status)
6572 goto out;
6573 status = decode_putfh(xdr);
6574 if (status)
6575 goto out;
6576 status = decode_read(xdr, rqstp, res);
6577 if (!status)
6578 status = res->count;
6579 out:
6580 return status;
6581 }
6582
6583 /*
6584 * Decode WRITE response
6585 */
nfs4_xdr_dec_write(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs_pgio_res * res)6586 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6587 struct nfs_pgio_res *res)
6588 {
6589 struct compound_hdr hdr;
6590 int status;
6591
6592 status = decode_compound_hdr(xdr, &hdr);
6593 if (status)
6594 goto out;
6595 status = decode_sequence(xdr, &res->seq_res, rqstp);
6596 if (status)
6597 goto out;
6598 status = decode_putfh(xdr);
6599 if (status)
6600 goto out;
6601 status = decode_write(xdr, res);
6602 if (status)
6603 goto out;
6604 if (res->fattr)
6605 decode_getfattr(xdr, res->fattr, res->server);
6606 if (!status)
6607 status = res->count;
6608 out:
6609 return status;
6610 }
6611
6612 /*
6613 * Decode COMMIT response
6614 */
nfs4_xdr_dec_commit(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs_commitres * res)6615 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6616 struct nfs_commitres *res)
6617 {
6618 struct compound_hdr hdr;
6619 int status;
6620
6621 status = decode_compound_hdr(xdr, &hdr);
6622 if (status)
6623 goto out;
6624 status = decode_sequence(xdr, &res->seq_res, rqstp);
6625 if (status)
6626 goto out;
6627 status = decode_putfh(xdr);
6628 if (status)
6629 goto out;
6630 status = decode_commit(xdr, res);
6631 out:
6632 return status;
6633 }
6634
6635 /*
6636 * Decode FSINFO response
6637 */
nfs4_xdr_dec_fsinfo(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs4_fsinfo_res * res)6638 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6639 struct nfs4_fsinfo_res *res)
6640 {
6641 struct compound_hdr hdr;
6642 int status;
6643
6644 status = decode_compound_hdr(xdr, &hdr);
6645 if (!status)
6646 status = decode_sequence(xdr, &res->seq_res, req);
6647 if (!status)
6648 status = decode_putfh(xdr);
6649 if (!status)
6650 status = decode_fsinfo(xdr, res->fsinfo);
6651 return status;
6652 }
6653
6654 /*
6655 * Decode PATHCONF response
6656 */
nfs4_xdr_dec_pathconf(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs4_pathconf_res * res)6657 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6658 struct nfs4_pathconf_res *res)
6659 {
6660 struct compound_hdr hdr;
6661 int status;
6662
6663 status = decode_compound_hdr(xdr, &hdr);
6664 if (!status)
6665 status = decode_sequence(xdr, &res->seq_res, req);
6666 if (!status)
6667 status = decode_putfh(xdr);
6668 if (!status)
6669 status = decode_pathconf(xdr, res->pathconf);
6670 return status;
6671 }
6672
6673 /*
6674 * Decode STATFS response
6675 */
nfs4_xdr_dec_statfs(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs4_statfs_res * res)6676 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6677 struct nfs4_statfs_res *res)
6678 {
6679 struct compound_hdr hdr;
6680 int status;
6681
6682 status = decode_compound_hdr(xdr, &hdr);
6683 if (!status)
6684 status = decode_sequence(xdr, &res->seq_res, req);
6685 if (!status)
6686 status = decode_putfh(xdr);
6687 if (!status)
6688 status = decode_statfs(xdr, res->fsstat);
6689 return status;
6690 }
6691
6692 /*
6693 * Decode GETATTR_BITMAP response
6694 */
nfs4_xdr_dec_server_caps(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs4_server_caps_res * res)6695 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6696 struct xdr_stream *xdr,
6697 struct nfs4_server_caps_res *res)
6698 {
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, req);
6706 if (status)
6707 goto out;
6708 status = decode_putfh(xdr);
6709 if (status)
6710 goto out;
6711 status = decode_server_caps(xdr, res);
6712 out:
6713 return status;
6714 }
6715
6716 /*
6717 * Decode RENEW response
6718 */
nfs4_xdr_dec_renew(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * __unused)6719 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6720 void *__unused)
6721 {
6722 struct compound_hdr hdr;
6723 int status;
6724
6725 status = decode_compound_hdr(xdr, &hdr);
6726 if (!status)
6727 status = decode_renew(xdr);
6728 return status;
6729 }
6730
6731 /*
6732 * Decode SETCLIENTID response
6733 */
nfs4_xdr_dec_setclientid(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs4_setclientid_res * res)6734 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6735 struct xdr_stream *xdr,
6736 struct nfs4_setclientid_res *res)
6737 {
6738 struct compound_hdr hdr;
6739 int status;
6740
6741 status = decode_compound_hdr(xdr, &hdr);
6742 if (!status)
6743 status = decode_setclientid(xdr, res);
6744 return status;
6745 }
6746
6747 /*
6748 * Decode SETCLIENTID_CONFIRM response
6749 */
nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst * req,struct xdr_stream * xdr)6750 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6751 struct xdr_stream *xdr)
6752 {
6753 struct compound_hdr hdr;
6754 int status;
6755
6756 status = decode_compound_hdr(xdr, &hdr);
6757 if (!status)
6758 status = decode_setclientid_confirm(xdr);
6759 return status;
6760 }
6761
6762 /*
6763 * Decode DELEGRETURN response
6764 */
nfs4_xdr_dec_delegreturn(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs4_delegreturnres * res)6765 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6766 struct xdr_stream *xdr,
6767 struct nfs4_delegreturnres *res)
6768 {
6769 struct compound_hdr hdr;
6770 int status;
6771
6772 status = decode_compound_hdr(xdr, &hdr);
6773 if (status)
6774 goto out;
6775 status = decode_sequence(xdr, &res->seq_res, rqstp);
6776 if (status)
6777 goto out;
6778 status = decode_putfh(xdr);
6779 if (status != 0)
6780 goto out;
6781 status = decode_getfattr(xdr, res->fattr, res->server);
6782 if (status != 0)
6783 goto out;
6784 status = decode_delegreturn(xdr);
6785 out:
6786 return status;
6787 }
6788
6789 /*
6790 * Decode FS_LOCATIONS response
6791 */
nfs4_xdr_dec_fs_locations(struct rpc_rqst * req,struct xdr_stream * xdr,struct nfs4_fs_locations_res * res)6792 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6793 struct xdr_stream *xdr,
6794 struct nfs4_fs_locations_res *res)
6795 {
6796 struct compound_hdr hdr;
6797 int status;
6798
6799 status = decode_compound_hdr(xdr, &hdr);
6800 if (status)
6801 goto out;
6802 status = decode_sequence(xdr, &res->seq_res, req);
6803 if (status)
6804 goto out;
6805 status = decode_putfh(xdr);
6806 if (status)
6807 goto out;
6808 if (res->migration) {
6809 xdr_enter_page(xdr, PAGE_SIZE);
6810 status = decode_getfattr_generic(xdr,
6811 &res->fs_locations->fattr,
6812 NULL, res->fs_locations,
6813 NULL, res->fs_locations->server);
6814 if (status)
6815 goto out;
6816 if (res->renew)
6817 status = decode_renew(xdr);
6818 } else {
6819 status = decode_lookup(xdr);
6820 if (status)
6821 goto out;
6822 xdr_enter_page(xdr, PAGE_SIZE);
6823 status = decode_getfattr_generic(xdr,
6824 &res->fs_locations->fattr,
6825 NULL, res->fs_locations,
6826 NULL, res->fs_locations->server);
6827 }
6828 out:
6829 return status;
6830 }
6831
6832 /*
6833 * Decode SECINFO response
6834 */
nfs4_xdr_dec_secinfo(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs4_secinfo_res * res)6835 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6836 struct xdr_stream *xdr,
6837 struct nfs4_secinfo_res *res)
6838 {
6839 struct compound_hdr hdr;
6840 int status;
6841
6842 status = decode_compound_hdr(xdr, &hdr);
6843 if (status)
6844 goto out;
6845 status = decode_sequence(xdr, &res->seq_res, rqstp);
6846 if (status)
6847 goto out;
6848 status = decode_putfh(xdr);
6849 if (status)
6850 goto out;
6851 status = decode_secinfo(xdr, res);
6852 out:
6853 return status;
6854 }
6855
6856 /*
6857 * Decode FSID_PRESENT response
6858 */
nfs4_xdr_dec_fsid_present(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs4_fsid_present_res * res)6859 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
6860 struct xdr_stream *xdr,
6861 struct nfs4_fsid_present_res *res)
6862 {
6863 struct compound_hdr hdr;
6864 int status;
6865
6866 status = decode_compound_hdr(xdr, &hdr);
6867 if (status)
6868 goto out;
6869 status = decode_sequence(xdr, &res->seq_res, rqstp);
6870 if (status)
6871 goto out;
6872 status = decode_putfh(xdr);
6873 if (status)
6874 goto out;
6875 status = decode_getfh(xdr, res->fh);
6876 if (status)
6877 goto out;
6878 if (res->renew)
6879 status = decode_renew(xdr);
6880 out:
6881 return status;
6882 }
6883
6884 #if defined(CONFIG_NFS_V4_1)
6885 /*
6886 * Decode BIND_CONN_TO_SESSION response
6887 */
nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * res)6888 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
6889 struct xdr_stream *xdr,
6890 void *res)
6891 {
6892 struct compound_hdr hdr;
6893 int status;
6894
6895 status = decode_compound_hdr(xdr, &hdr);
6896 if (!status)
6897 status = decode_bind_conn_to_session(xdr, res);
6898 return status;
6899 }
6900
6901 /*
6902 * Decode EXCHANGE_ID response
6903 */
nfs4_xdr_dec_exchange_id(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * res)6904 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6905 struct xdr_stream *xdr,
6906 void *res)
6907 {
6908 struct compound_hdr hdr;
6909 int status;
6910
6911 status = decode_compound_hdr(xdr, &hdr);
6912 if (!status)
6913 status = decode_exchange_id(xdr, res);
6914 return status;
6915 }
6916
6917 /*
6918 * Decode CREATE_SESSION response
6919 */
nfs4_xdr_dec_create_session(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs41_create_session_res * res)6920 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6921 struct xdr_stream *xdr,
6922 struct nfs41_create_session_res *res)
6923 {
6924 struct compound_hdr hdr;
6925 int status;
6926
6927 status = decode_compound_hdr(xdr, &hdr);
6928 if (!status)
6929 status = decode_create_session(xdr, res);
6930 return status;
6931 }
6932
6933 /*
6934 * Decode DESTROY_SESSION response
6935 */
nfs4_xdr_dec_destroy_session(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * res)6936 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6937 struct xdr_stream *xdr,
6938 void *res)
6939 {
6940 struct compound_hdr hdr;
6941 int status;
6942
6943 status = decode_compound_hdr(xdr, &hdr);
6944 if (!status)
6945 status = decode_destroy_session(xdr, res);
6946 return status;
6947 }
6948
6949 /*
6950 * Decode DESTROY_CLIENTID response
6951 */
nfs4_xdr_dec_destroy_clientid(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * res)6952 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
6953 struct xdr_stream *xdr,
6954 void *res)
6955 {
6956 struct compound_hdr hdr;
6957 int status;
6958
6959 status = decode_compound_hdr(xdr, &hdr);
6960 if (!status)
6961 status = decode_destroy_clientid(xdr, res);
6962 return status;
6963 }
6964
6965 /*
6966 * Decode SEQUENCE response
6967 */
nfs4_xdr_dec_sequence(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs4_sequence_res * res)6968 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6969 struct xdr_stream *xdr,
6970 struct nfs4_sequence_res *res)
6971 {
6972 struct compound_hdr hdr;
6973 int status;
6974
6975 status = decode_compound_hdr(xdr, &hdr);
6976 if (!status)
6977 status = decode_sequence(xdr, res, rqstp);
6978 return status;
6979 }
6980
6981 /*
6982 * Decode GET_LEASE_TIME response
6983 */
nfs4_xdr_dec_get_lease_time(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs4_get_lease_time_res * res)6984 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6985 struct xdr_stream *xdr,
6986 struct nfs4_get_lease_time_res *res)
6987 {
6988 struct compound_hdr hdr;
6989 int status;
6990
6991 status = decode_compound_hdr(xdr, &hdr);
6992 if (!status)
6993 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6994 if (!status)
6995 status = decode_putrootfh(xdr);
6996 if (!status)
6997 status = decode_fsinfo(xdr, res->lr_fsinfo);
6998 return status;
6999 }
7000
7001 /*
7002 * Decode RECLAIM_COMPLETE response
7003 */
nfs4_xdr_dec_reclaim_complete(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs41_reclaim_complete_res * res)7004 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7005 struct xdr_stream *xdr,
7006 struct nfs41_reclaim_complete_res *res)
7007 {
7008 struct compound_hdr hdr;
7009 int status;
7010
7011 status = decode_compound_hdr(xdr, &hdr);
7012 if (!status)
7013 status = decode_sequence(xdr, &res->seq_res, rqstp);
7014 if (!status)
7015 status = decode_reclaim_complete(xdr, NULL);
7016 return status;
7017 }
7018
7019 /*
7020 * Decode GETDEVINFO response
7021 */
nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs4_getdeviceinfo_res * res)7022 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7023 struct xdr_stream *xdr,
7024 struct nfs4_getdeviceinfo_res *res)
7025 {
7026 struct compound_hdr hdr;
7027 int status;
7028
7029 status = decode_compound_hdr(xdr, &hdr);
7030 if (status != 0)
7031 goto out;
7032 status = decode_sequence(xdr, &res->seq_res, rqstp);
7033 if (status != 0)
7034 goto out;
7035 status = decode_getdeviceinfo(xdr, res->pdev);
7036 out:
7037 return status;
7038 }
7039
7040 /*
7041 * Decode LAYOUTGET response
7042 */
nfs4_xdr_dec_layoutget(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs4_layoutget_res * res)7043 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7044 struct xdr_stream *xdr,
7045 struct nfs4_layoutget_res *res)
7046 {
7047 struct compound_hdr hdr;
7048 int status;
7049
7050 status = decode_compound_hdr(xdr, &hdr);
7051 if (status)
7052 goto out;
7053 status = decode_sequence(xdr, &res->seq_res, rqstp);
7054 if (status)
7055 goto out;
7056 status = decode_putfh(xdr);
7057 if (status)
7058 goto out;
7059 status = decode_layoutget(xdr, rqstp, res);
7060 out:
7061 return status;
7062 }
7063
7064 /*
7065 * Decode LAYOUTRETURN response
7066 */
nfs4_xdr_dec_layoutreturn(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs4_layoutreturn_res * res)7067 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7068 struct xdr_stream *xdr,
7069 struct nfs4_layoutreturn_res *res)
7070 {
7071 struct compound_hdr hdr;
7072 int status;
7073
7074 status = decode_compound_hdr(xdr, &hdr);
7075 if (status)
7076 goto out;
7077 status = decode_sequence(xdr, &res->seq_res, rqstp);
7078 if (status)
7079 goto out;
7080 status = decode_putfh(xdr);
7081 if (status)
7082 goto out;
7083 status = decode_layoutreturn(xdr, res);
7084 out:
7085 return status;
7086 }
7087
7088 /*
7089 * Decode LAYOUTCOMMIT response
7090 */
nfs4_xdr_dec_layoutcommit(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs4_layoutcommit_res * res)7091 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7092 struct xdr_stream *xdr,
7093 struct nfs4_layoutcommit_res *res)
7094 {
7095 struct compound_hdr hdr;
7096 int status;
7097
7098 status = decode_compound_hdr(xdr, &hdr);
7099 if (status)
7100 goto out;
7101 status = decode_sequence(xdr, &res->seq_res, rqstp);
7102 if (status)
7103 goto out;
7104 status = decode_putfh(xdr);
7105 if (status)
7106 goto out;
7107 status = decode_layoutcommit(xdr, rqstp, res);
7108 if (status)
7109 goto out;
7110 decode_getfattr(xdr, res->fattr, res->server);
7111 out:
7112 return status;
7113 }
7114
7115 /*
7116 * Decode SECINFO_NO_NAME response
7117 */
nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs4_secinfo_res * res)7118 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7119 struct xdr_stream *xdr,
7120 struct nfs4_secinfo_res *res)
7121 {
7122 struct compound_hdr hdr;
7123 int status;
7124
7125 status = decode_compound_hdr(xdr, &hdr);
7126 if (status)
7127 goto out;
7128 status = decode_sequence(xdr, &res->seq_res, rqstp);
7129 if (status)
7130 goto out;
7131 status = decode_putrootfh(xdr);
7132 if (status)
7133 goto out;
7134 status = decode_secinfo_no_name(xdr, res);
7135 out:
7136 return status;
7137 }
7138
7139 /*
7140 * Decode TEST_STATEID response
7141 */
nfs4_xdr_dec_test_stateid(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs41_test_stateid_res * res)7142 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7143 struct xdr_stream *xdr,
7144 struct nfs41_test_stateid_res *res)
7145 {
7146 struct compound_hdr hdr;
7147 int status;
7148
7149 status = decode_compound_hdr(xdr, &hdr);
7150 if (status)
7151 goto out;
7152 status = decode_sequence(xdr, &res->seq_res, rqstp);
7153 if (status)
7154 goto out;
7155 status = decode_test_stateid(xdr, res);
7156 out:
7157 return status;
7158 }
7159
7160 /*
7161 * Decode FREE_STATEID response
7162 */
nfs4_xdr_dec_free_stateid(struct rpc_rqst * rqstp,struct xdr_stream * xdr,struct nfs41_free_stateid_res * res)7163 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7164 struct xdr_stream *xdr,
7165 struct nfs41_free_stateid_res *res)
7166 {
7167 struct compound_hdr hdr;
7168 int status;
7169
7170 status = decode_compound_hdr(xdr, &hdr);
7171 if (status)
7172 goto out;
7173 status = decode_sequence(xdr, &res->seq_res, rqstp);
7174 if (status)
7175 goto out;
7176 status = decode_free_stateid(xdr, res);
7177 out:
7178 return status;
7179 }
7180 #endif /* CONFIG_NFS_V4_1 */
7181
7182 /**
7183 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7184 * the local page cache.
7185 * @xdr: XDR stream where entry resides
7186 * @entry: buffer to fill in with entry data
7187 * @plus: boolean indicating whether this should be a readdirplus entry
7188 *
7189 * Returns zero if successful, otherwise a negative errno value is
7190 * returned.
7191 *
7192 * This function is not invoked during READDIR reply decoding, but
7193 * rather whenever an application invokes the getdents(2) system call
7194 * on a directory already in our cache.
7195 */
nfs4_decode_dirent(struct xdr_stream * xdr,struct nfs_entry * entry,int plus)7196 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7197 int plus)
7198 {
7199 unsigned int savep;
7200 uint32_t bitmap[3] = {0};
7201 uint32_t len;
7202 __be32 *p = xdr_inline_decode(xdr, 4);
7203 if (unlikely(!p))
7204 goto out_overflow;
7205 if (*p == xdr_zero) {
7206 p = xdr_inline_decode(xdr, 4);
7207 if (unlikely(!p))
7208 goto out_overflow;
7209 if (*p == xdr_zero)
7210 return -EAGAIN;
7211 entry->eof = 1;
7212 return -EBADCOOKIE;
7213 }
7214
7215 p = xdr_inline_decode(xdr, 12);
7216 if (unlikely(!p))
7217 goto out_overflow;
7218 entry->prev_cookie = entry->cookie;
7219 p = xdr_decode_hyper(p, &entry->cookie);
7220 entry->len = be32_to_cpup(p);
7221
7222 p = xdr_inline_decode(xdr, entry->len);
7223 if (unlikely(!p))
7224 goto out_overflow;
7225 entry->name = (const char *) p;
7226
7227 /*
7228 * In case the server doesn't return an inode number,
7229 * we fake one here. (We don't use inode number 0,
7230 * since glibc seems to choke on it...)
7231 */
7232 entry->ino = 1;
7233 entry->fattr->valid = 0;
7234
7235 if (decode_attr_bitmap(xdr, bitmap) < 0)
7236 goto out_overflow;
7237
7238 if (decode_attr_length(xdr, &len, &savep) < 0)
7239 goto out_overflow;
7240
7241 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7242 NULL, entry->label, entry->server) < 0)
7243 goto out_overflow;
7244 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7245 entry->ino = entry->fattr->mounted_on_fileid;
7246 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7247 entry->ino = entry->fattr->fileid;
7248
7249 entry->d_type = DT_UNKNOWN;
7250 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7251 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7252
7253 return 0;
7254
7255 out_overflow:
7256 print_overflow_msg(__func__, xdr);
7257 return -EAGAIN;
7258 }
7259
7260 /*
7261 * We need to translate between nfs status return values and
7262 * the local errno values which may not be the same.
7263 */
7264 static struct {
7265 int stat;
7266 int errno;
7267 } nfs_errtbl[] = {
7268 { NFS4_OK, 0 },
7269 { NFS4ERR_PERM, -EPERM },
7270 { NFS4ERR_NOENT, -ENOENT },
7271 { NFS4ERR_IO, -errno_NFSERR_IO},
7272 { NFS4ERR_NXIO, -ENXIO },
7273 { NFS4ERR_ACCESS, -EACCES },
7274 { NFS4ERR_EXIST, -EEXIST },
7275 { NFS4ERR_XDEV, -EXDEV },
7276 { NFS4ERR_NOTDIR, -ENOTDIR },
7277 { NFS4ERR_ISDIR, -EISDIR },
7278 { NFS4ERR_INVAL, -EINVAL },
7279 { NFS4ERR_FBIG, -EFBIG },
7280 { NFS4ERR_NOSPC, -ENOSPC },
7281 { NFS4ERR_ROFS, -EROFS },
7282 { NFS4ERR_MLINK, -EMLINK },
7283 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7284 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7285 { NFS4ERR_DQUOT, -EDQUOT },
7286 { NFS4ERR_STALE, -ESTALE },
7287 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7288 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7289 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7290 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7291 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7292 { NFS4ERR_BADTYPE, -EBADTYPE },
7293 { NFS4ERR_LOCKED, -EAGAIN },
7294 { NFS4ERR_SYMLINK, -ELOOP },
7295 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7296 { NFS4ERR_DEADLOCK, -EDEADLK },
7297 { -1, -EIO }
7298 };
7299
7300 /*
7301 * Convert an NFS error code to a local one.
7302 * This one is used jointly by NFSv2 and NFSv3.
7303 */
7304 static int
nfs4_stat_to_errno(int stat)7305 nfs4_stat_to_errno(int stat)
7306 {
7307 int i;
7308 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7309 if (nfs_errtbl[i].stat == stat)
7310 return nfs_errtbl[i].errno;
7311 }
7312 if (stat <= 10000 || stat > 10100) {
7313 /* The server is looney tunes. */
7314 return -EREMOTEIO;
7315 }
7316 /* If we cannot translate the error, the recovery routines should
7317 * handle it.
7318 * Note: remaining NFSv4 error codes have values > 10000, so should
7319 * not conflict with native Linux error codes.
7320 */
7321 return -stat;
7322 }
7323
7324 #ifdef CONFIG_NFS_V4_2
7325 #include "nfs42xdr.c"
7326 #endif /* CONFIG_NFS_V4_2 */
7327
7328 #define PROC(proc, argtype, restype) \
7329 [NFSPROC4_CLNT_##proc] = { \
7330 .p_proc = NFSPROC4_COMPOUND, \
7331 .p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \
7332 .p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \
7333 .p_arglen = NFS4_##argtype##_sz, \
7334 .p_replen = NFS4_##restype##_sz, \
7335 .p_statidx = NFSPROC4_CLNT_##proc, \
7336 .p_name = #proc, \
7337 }
7338
7339 #define STUB(proc) \
7340 [NFSPROC4_CLNT_##proc] = { \
7341 .p_name = #proc, \
7342 }
7343
7344 struct rpc_procinfo nfs4_procedures[] = {
7345 PROC(READ, enc_read, dec_read),
7346 PROC(WRITE, enc_write, dec_write),
7347 PROC(COMMIT, enc_commit, dec_commit),
7348 PROC(OPEN, enc_open, dec_open),
7349 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7350 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7351 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7352 PROC(CLOSE, enc_close, dec_close),
7353 PROC(SETATTR, enc_setattr, dec_setattr),
7354 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7355 PROC(RENEW, enc_renew, dec_renew),
7356 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7357 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7358 PROC(LOCK, enc_lock, dec_lock),
7359 PROC(LOCKT, enc_lockt, dec_lockt),
7360 PROC(LOCKU, enc_locku, dec_locku),
7361 PROC(ACCESS, enc_access, dec_access),
7362 PROC(GETATTR, enc_getattr, dec_getattr),
7363 PROC(LOOKUP, enc_lookup, dec_lookup),
7364 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7365 PROC(REMOVE, enc_remove, dec_remove),
7366 PROC(RENAME, enc_rename, dec_rename),
7367 PROC(LINK, enc_link, dec_link),
7368 PROC(SYMLINK, enc_symlink, dec_symlink),
7369 PROC(CREATE, enc_create, dec_create),
7370 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7371 PROC(STATFS, enc_statfs, dec_statfs),
7372 PROC(READLINK, enc_readlink, dec_readlink),
7373 PROC(READDIR, enc_readdir, dec_readdir),
7374 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7375 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7376 PROC(GETACL, enc_getacl, dec_getacl),
7377 PROC(SETACL, enc_setacl, dec_setacl),
7378 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7379 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7380 PROC(SECINFO, enc_secinfo, dec_secinfo),
7381 PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present),
7382 #if defined(CONFIG_NFS_V4_1)
7383 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7384 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
7385 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7386 PROC(SEQUENCE, enc_sequence, dec_sequence),
7387 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7388 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
7389 PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7390 PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
7391 PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7392 PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7393 PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7394 PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7395 PROC(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7396 STUB(GETDEVICELIST),
7397 PROC(BIND_CONN_TO_SESSION,
7398 enc_bind_conn_to_session, dec_bind_conn_to_session),
7399 PROC(DESTROY_CLIENTID, enc_destroy_clientid, dec_destroy_clientid),
7400 #endif /* CONFIG_NFS_V4_1 */
7401 #ifdef CONFIG_NFS_V4_2
7402 PROC(SEEK, enc_seek, dec_seek),
7403 #endif /* CONFIG_NFS_V4_2 */
7404 };
7405
7406 const struct rpc_version nfs_version4 = {
7407 .number = 4,
7408 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7409 .procs = nfs4_procedures
7410 };
7411
7412 /*
7413 * Local variables:
7414 * c-basic-offset: 8
7415 * End:
7416 */
7417