1 /*
2 * fs/nfs/nfs4xdr.c
3 *
4 * Client-side XDR for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <linux/param.h>
39 #include <linux/time.h>
40 #include <linux/mm.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/in.h>
44 #include <linux/pagemap.h>
45 #include <linux/proc_fs.h>
46 #include <linux/kdev_t.h>
47 #include <linux/module.h>
48 #include <linux/utsname.h>
49 #include <linux/sunrpc/clnt.h>
50 #include <linux/sunrpc/msg_prot.h>
51 #include <linux/sunrpc/gss_api.h>
52 #include <linux/nfs.h>
53 #include <linux/nfs4.h>
54 #include <linux/nfs_fs.h>
55
56 #include "nfs4_fs.h"
57 #include "nfs4trace.h"
58 #include "internal.h"
59 #include "nfs4idmap.h"
60 #include "nfs4session.h"
61 #include "pnfs.h"
62 #include "netns.h"
63
64 #define NFSDBG_FACILITY NFSDBG_XDR
65
66 /* Mapping from NFS error code to "errno" error code. */
67 #define errno_NFSERR_IO EIO
68
69 struct compound_hdr;
70 static int nfs4_stat_to_errno(int);
71 static void encode_layoutget(struct xdr_stream *xdr,
72 const struct nfs4_layoutget_args *args,
73 struct compound_hdr *hdr);
74 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
75 struct nfs4_layoutget_res *res);
76
77 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
78 #ifdef DEBUG
79 #define NFS4_MAXTAGLEN 20
80 #else
81 #define NFS4_MAXTAGLEN 0
82 #endif
83
84 /* lock,open owner id:
85 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
86 */
87 #define pagepad_maxsz (1)
88 #define open_owner_id_maxsz (1 + 2 + 1 + 1 + 2)
89 #define lock_owner_id_maxsz (1 + 1 + 4)
90 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
91 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
92 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
93 #define op_encode_hdr_maxsz (1)
94 #define op_decode_hdr_maxsz (2)
95 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
96 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
97 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
98 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
99 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
100 (NFS4_FHSIZE >> 2))
101 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
102 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
103 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
104 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
105 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
106 ((3+NFS4_FHSIZE) >> 2))
107 #define nfs4_fattr_bitmap_maxsz 4
108 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
109 #define nfstime4_maxsz (3)
110 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
111 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
112 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
113 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
114 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
115 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
116 #define nfs4_label_maxsz (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
117 #else
118 #define nfs4_label_maxsz 0
119 #endif
120 /* We support only one layout type per file system */
121 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
122 /* This is based on getfattr, which uses the most attributes: */
123 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
124 3*nfstime4_maxsz + \
125 nfs4_owner_maxsz + \
126 nfs4_group_maxsz + nfs4_label_maxsz + \
127 decode_mdsthreshold_maxsz))
128 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
129 nfs4_fattr_value_maxsz)
130 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
131 #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
132 1 + 2 + 1 + \
133 nfs4_owner_maxsz + \
134 nfs4_group_maxsz + \
135 nfs4_label_maxsz + \
136 1 + nfstime4_maxsz + \
137 1 + nfstime4_maxsz)
138 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
139 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
140 #define encode_restorefh_maxsz (op_encode_hdr_maxsz)
141 #define decode_restorefh_maxsz (op_decode_hdr_maxsz)
142 #define encode_fsinfo_maxsz (encode_getattr_maxsz)
143 /* The 5 accounts for the PNFS attributes, and assumes that at most three
144 * layout types will be returned.
145 */
146 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + \
147 nfs4_fattr_bitmap_maxsz + 1 + \
148 1 /* lease time */ + \
149 2 /* max filesize */ + \
150 2 /* max read */ + \
151 2 /* max write */ + \
152 nfstime4_maxsz /* time delta */ + \
153 5 /* fs layout types */ + \
154 1 /* layout blksize */ + \
155 1 /* clone blksize */ + \
156 1 /* change attr type */ + \
157 1 /* xattr support */)
158 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
159 #define decode_renew_maxsz (op_decode_hdr_maxsz)
160 #define encode_setclientid_maxsz \
161 (op_encode_hdr_maxsz + \
162 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
163 /* client name */ \
164 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
165 1 /* sc_prog */ + \
166 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
167 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
168 1) /* sc_cb_ident */
169 #define decode_setclientid_maxsz \
170 (op_decode_hdr_maxsz + \
171 2 /* clientid */ + \
172 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
173 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
174 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
175 #define encode_setclientid_confirm_maxsz \
176 (op_encode_hdr_maxsz + \
177 3 + (NFS4_VERIFIER_SIZE >> 2))
178 #define decode_setclientid_confirm_maxsz \
179 (op_decode_hdr_maxsz)
180 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
181 #define decode_lookup_maxsz (op_decode_hdr_maxsz)
182 #define encode_lookupp_maxsz (op_encode_hdr_maxsz)
183 #define decode_lookupp_maxsz (op_decode_hdr_maxsz)
184 #define encode_share_access_maxsz \
185 (2)
186 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
187 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
188 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
189 #define encode_open_maxsz (op_encode_hdr_maxsz + \
190 2 + encode_share_access_maxsz + 2 + \
191 open_owner_id_maxsz + \
192 encode_opentype_maxsz + \
193 encode_claim_null_maxsz)
194 #define decode_space_limit_maxsz (3)
195 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
196 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
197 decode_space_limit_maxsz + \
198 decode_ace_maxsz)
199 #define decode_change_info_maxsz (5)
200 #define decode_open_maxsz (op_decode_hdr_maxsz + \
201 decode_stateid_maxsz + \
202 decode_change_info_maxsz + 1 + \
203 nfs4_fattr_bitmap_maxsz + \
204 decode_delegation_maxsz)
205 #define encode_open_confirm_maxsz \
206 (op_encode_hdr_maxsz + \
207 encode_stateid_maxsz + 1)
208 #define decode_open_confirm_maxsz \
209 (op_decode_hdr_maxsz + \
210 decode_stateid_maxsz)
211 #define encode_open_downgrade_maxsz \
212 (op_encode_hdr_maxsz + \
213 encode_stateid_maxsz + 1 + \
214 encode_share_access_maxsz)
215 #define decode_open_downgrade_maxsz \
216 (op_decode_hdr_maxsz + \
217 decode_stateid_maxsz)
218 #define encode_close_maxsz (op_encode_hdr_maxsz + \
219 1 + encode_stateid_maxsz)
220 #define decode_close_maxsz (op_decode_hdr_maxsz + \
221 decode_stateid_maxsz)
222 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
223 encode_stateid_maxsz + \
224 encode_attrs_maxsz)
225 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
226 nfs4_fattr_bitmap_maxsz)
227 #define encode_delegattr_maxsz (op_encode_hdr_maxsz + \
228 encode_stateid_maxsz + \
229 nfs4_fattr_bitmap_maxsz + \
230 2*nfstime4_maxsz)
231 #define decode_delegattr_maxsz (decode_setattr_maxsz)
232 #define encode_read_maxsz (op_encode_hdr_maxsz + \
233 encode_stateid_maxsz + 3)
234 #define decode_read_maxsz (op_decode_hdr_maxsz + 2 + pagepad_maxsz)
235 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
236 2 + encode_verifier_maxsz + 5 + \
237 nfs4_label_maxsz)
238 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
239 decode_verifier_maxsz + pagepad_maxsz)
240 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
241 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1 + pagepad_maxsz)
242 #define encode_write_maxsz (op_encode_hdr_maxsz + \
243 encode_stateid_maxsz + 4)
244 #define decode_write_maxsz (op_decode_hdr_maxsz + \
245 2 + decode_verifier_maxsz)
246 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
247 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
248 decode_verifier_maxsz)
249 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
250 nfs4_name_maxsz)
251 #define decode_remove_maxsz (op_decode_hdr_maxsz + \
252 decode_change_info_maxsz)
253 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
254 2 * nfs4_name_maxsz)
255 #define decode_rename_maxsz (op_decode_hdr_maxsz + \
256 decode_change_info_maxsz + \
257 decode_change_info_maxsz)
258 #define encode_link_maxsz (op_encode_hdr_maxsz + \
259 nfs4_name_maxsz)
260 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
261 #define encode_lockowner_maxsz (7)
262 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
263 7 + \
264 1 + encode_stateid_maxsz + 1 + \
265 encode_lockowner_maxsz)
266 #define decode_lock_denied_maxsz \
267 (8 + decode_lockowner_maxsz)
268 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
269 decode_lock_denied_maxsz)
270 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
271 encode_lockowner_maxsz)
272 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
273 decode_lock_denied_maxsz)
274 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
275 encode_stateid_maxsz + \
276 4)
277 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
278 decode_stateid_maxsz)
279 #define encode_release_lockowner_maxsz \
280 (op_encode_hdr_maxsz + \
281 encode_lockowner_maxsz)
282 #define decode_release_lockowner_maxsz \
283 (op_decode_hdr_maxsz)
284 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
285 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
286 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
287 1 + nfs4_name_maxsz + \
288 1 + \
289 nfs4_fattr_maxsz)
290 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
291 #define encode_create_maxsz (op_encode_hdr_maxsz + \
292 1 + 2 + nfs4_name_maxsz + \
293 encode_attrs_maxsz)
294 #define decode_create_maxsz (op_decode_hdr_maxsz + \
295 decode_change_info_maxsz + \
296 nfs4_fattr_bitmap_maxsz)
297 #define encode_statfs_maxsz (encode_getattr_maxsz)
298 #define decode_statfs_maxsz (decode_getattr_maxsz)
299 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
300 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
301 #define encode_getacl_maxsz (encode_getattr_maxsz)
302 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
303 nfs4_fattr_bitmap_maxsz + 1 + pagepad_maxsz)
304 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
305 encode_stateid_maxsz + 3)
306 #define decode_setacl_maxsz (decode_setattr_maxsz)
307 #define encode_fs_locations_maxsz \
308 (encode_getattr_maxsz)
309 #define decode_fs_locations_maxsz \
310 (pagepad_maxsz)
311 #define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
312 #define decode_secinfo_maxsz (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
313
314 #if defined(CONFIG_NFS_V4_1)
315 #define NFS4_MAX_MACHINE_NAME_LEN (64)
316 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
317 sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
318
319 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
320 encode_verifier_maxsz + \
321 1 /* co_ownerid.len */ + \
322 /* eia_clientowner */ \
323 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
324 1 /* flags */ + \
325 1 /* spa_how */ + \
326 /* max is SP4_MACH_CRED (for now) */ + \
327 1 + NFS4_OP_MAP_NUM_WORDS + \
328 1 + NFS4_OP_MAP_NUM_WORDS + \
329 1 /* implementation id array of size 1 */ + \
330 1 /* nii_domain */ + \
331 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
332 1 /* nii_name */ + \
333 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
334 3 /* nii_date */)
335 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
336 2 /* eir_clientid */ + \
337 1 /* eir_sequenceid */ + \
338 1 /* eir_flags */ + \
339 1 /* spr_how */ + \
340 /* max is SP4_MACH_CRED (for now) */ + \
341 1 + NFS4_OP_MAP_NUM_WORDS + \
342 1 + NFS4_OP_MAP_NUM_WORDS + \
343 2 /* eir_server_owner.so_minor_id */ + \
344 /* eir_server_owner.so_major_id<> */ \
345 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
346 /* eir_server_scope<> */ \
347 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
348 1 /* eir_server_impl_id array length */ + \
349 1 /* nii_domain */ + \
350 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
351 1 /* nii_name */ + \
352 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
353 3 /* nii_date */)
354 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
355 #define decode_channel_attrs_maxsz (6 + \
356 1 /* ca_rdma_ird.len */ + \
357 1 /* ca_rdma_ird */)
358 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \
359 2 /* csa_clientid */ + \
360 1 /* csa_sequence */ + \
361 1 /* csa_flags */ + \
362 encode_channel_attrs_maxsz + \
363 encode_channel_attrs_maxsz + \
364 1 /* csa_cb_program */ + \
365 1 /* csa_sec_parms.len (1) */ + \
366 1 /* cb_secflavor (AUTH_SYS) */ + \
367 1 /* stamp */ + \
368 1 /* machinename.len */ + \
369 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
370 1 /* uid */ + \
371 1 /* gid */ + \
372 1 /* gids.len (0) */)
373 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \
374 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
375 1 /* csr_sequence */ + \
376 1 /* csr_flags */ + \
377 decode_channel_attrs_maxsz + \
378 decode_channel_attrs_maxsz)
379 #define encode_bind_conn_to_session_maxsz (op_encode_hdr_maxsz + \
380 /* bctsa_sessid */ \
381 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
382 1 /* bctsa_dir */ + \
383 1 /* bctsa_use_conn_in_rdma_mode */)
384 #define decode_bind_conn_to_session_maxsz (op_decode_hdr_maxsz + \
385 /* bctsr_sessid */ \
386 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
387 1 /* bctsr_dir */ + \
388 1 /* bctsr_use_conn_in_rdma_mode */)
389 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
390 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
391 #define encode_destroy_clientid_maxsz (op_encode_hdr_maxsz + 2)
392 #define decode_destroy_clientid_maxsz (op_decode_hdr_maxsz)
393 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \
394 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
395 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \
396 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
397 #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
398 #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
399 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
400 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
401 1 /* layout type */ + \
402 1 /* maxcount */ + \
403 1 /* bitmap size */ + \
404 1 /* notification bitmap length */ + \
405 1 /* notification bitmap, word 0 */)
406 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
407 1 /* layout type */ + \
408 1 /* opaque devaddr4 length */ + \
409 /* devaddr4 payload is read into page */ \
410 1 /* notification bitmap length */ + \
411 1 /* notification bitmap, word 0 */ + \
412 pagepad_maxsz /* possible XDR padding */)
413 #define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
414 encode_stateid_maxsz)
415 #define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
416 decode_stateid_maxsz + \
417 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE) + \
418 pagepad_maxsz)
419 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
420 2 /* offset */ + \
421 2 /* length */ + \
422 1 /* reclaim */ + \
423 encode_stateid_maxsz + \
424 1 /* new offset (true) */ + \
425 2 /* last byte written */ + \
426 1 /* nt_timechanged (false) */ + \
427 1 /* layoutupdate4 layout type */ + \
428 1 /* layoutupdate4 opaqueue len */)
429 /* the actual content of layoutupdate4 should
430 be allocated by drivers and spliced in
431 using xdr_write_pages */
432 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
433 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
434 encode_stateid_maxsz + \
435 1 + \
436 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
437 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
438 1 + decode_stateid_maxsz)
439 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
440 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
441 #define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \
442 XDR_QUADLEN(NFS4_STATEID_SIZE))
443 #define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1)
444 #define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \
445 XDR_QUADLEN(NFS4_STATEID_SIZE))
446 #define decode_free_stateid_maxsz (op_decode_hdr_maxsz)
447 #else /* CONFIG_NFS_V4_1 */
448 #define encode_sequence_maxsz 0
449 #define decode_sequence_maxsz 0
450 #define encode_layoutreturn_maxsz 0
451 #define decode_layoutreturn_maxsz 0
452 #define encode_layoutget_maxsz 0
453 #define decode_layoutget_maxsz 0
454 #endif /* CONFIG_NFS_V4_1 */
455
456 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
457 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
458 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
459 encode_sequence_maxsz + \
460 encode_putfh_maxsz + \
461 encode_read_maxsz)
462 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
463 decode_sequence_maxsz + \
464 decode_putfh_maxsz + \
465 decode_read_maxsz)
466 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
467 encode_sequence_maxsz + \
468 encode_putfh_maxsz + \
469 encode_readlink_maxsz)
470 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
471 decode_sequence_maxsz + \
472 decode_putfh_maxsz + \
473 decode_readlink_maxsz)
474 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
475 encode_sequence_maxsz + \
476 encode_putfh_maxsz + \
477 encode_readdir_maxsz)
478 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
479 decode_sequence_maxsz + \
480 decode_putfh_maxsz + \
481 decode_readdir_maxsz)
482 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
483 encode_sequence_maxsz + \
484 encode_putfh_maxsz + \
485 encode_write_maxsz + \
486 encode_getattr_maxsz)
487 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
488 decode_sequence_maxsz + \
489 decode_putfh_maxsz + \
490 decode_write_maxsz + \
491 decode_getattr_maxsz)
492 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
493 encode_sequence_maxsz + \
494 encode_putfh_maxsz + \
495 encode_commit_maxsz)
496 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
497 decode_sequence_maxsz + \
498 decode_putfh_maxsz + \
499 decode_commit_maxsz)
500 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
501 encode_sequence_maxsz + \
502 encode_putfh_maxsz + \
503 encode_open_maxsz + \
504 encode_access_maxsz + \
505 encode_getfh_maxsz + \
506 encode_getattr_maxsz + \
507 encode_layoutget_maxsz)
508 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
509 decode_sequence_maxsz + \
510 decode_putfh_maxsz + \
511 decode_open_maxsz + \
512 decode_access_maxsz + \
513 decode_getfh_maxsz + \
514 decode_getattr_maxsz + \
515 decode_layoutget_maxsz)
516 #define NFS4_enc_open_confirm_sz \
517 (compound_encode_hdr_maxsz + \
518 encode_putfh_maxsz + \
519 encode_open_confirm_maxsz)
520 #define NFS4_dec_open_confirm_sz \
521 (compound_decode_hdr_maxsz + \
522 decode_putfh_maxsz + \
523 decode_open_confirm_maxsz)
524 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
525 encode_sequence_maxsz + \
526 encode_putfh_maxsz + \
527 encode_open_maxsz + \
528 encode_access_maxsz + \
529 encode_getattr_maxsz + \
530 encode_layoutget_maxsz)
531 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
532 decode_sequence_maxsz + \
533 decode_putfh_maxsz + \
534 decode_open_maxsz + \
535 decode_access_maxsz + \
536 decode_getattr_maxsz + \
537 decode_layoutget_maxsz)
538 #define NFS4_enc_open_downgrade_sz \
539 (compound_encode_hdr_maxsz + \
540 encode_sequence_maxsz + \
541 encode_putfh_maxsz + \
542 encode_layoutreturn_maxsz + \
543 encode_open_downgrade_maxsz)
544 #define NFS4_dec_open_downgrade_sz \
545 (compound_decode_hdr_maxsz + \
546 decode_sequence_maxsz + \
547 decode_putfh_maxsz + \
548 decode_layoutreturn_maxsz + \
549 decode_open_downgrade_maxsz)
550 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
551 encode_sequence_maxsz + \
552 encode_putfh_maxsz + \
553 encode_layoutreturn_maxsz + \
554 encode_close_maxsz + \
555 encode_getattr_maxsz)
556 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
557 decode_sequence_maxsz + \
558 decode_putfh_maxsz + \
559 decode_layoutreturn_maxsz + \
560 decode_close_maxsz + \
561 decode_getattr_maxsz)
562 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
563 encode_sequence_maxsz + \
564 encode_putfh_maxsz + \
565 encode_setattr_maxsz + \
566 encode_getattr_maxsz)
567 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
568 decode_sequence_maxsz + \
569 decode_putfh_maxsz + \
570 decode_setattr_maxsz + \
571 decode_getattr_maxsz)
572 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
573 encode_sequence_maxsz + \
574 encode_putfh_maxsz + \
575 encode_fsinfo_maxsz)
576 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
577 decode_sequence_maxsz + \
578 decode_putfh_maxsz + \
579 decode_fsinfo_maxsz)
580 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
581 encode_renew_maxsz)
582 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
583 decode_renew_maxsz)
584 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
585 encode_setclientid_maxsz)
586 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
587 decode_setclientid_maxsz)
588 #define NFS4_enc_setclientid_confirm_sz \
589 (compound_encode_hdr_maxsz + \
590 encode_setclientid_confirm_maxsz)
591 #define NFS4_dec_setclientid_confirm_sz \
592 (compound_decode_hdr_maxsz + \
593 decode_setclientid_confirm_maxsz)
594 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
595 encode_sequence_maxsz + \
596 encode_putfh_maxsz + \
597 encode_lock_maxsz)
598 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
599 decode_sequence_maxsz + \
600 decode_putfh_maxsz + \
601 decode_lock_maxsz)
602 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
603 encode_sequence_maxsz + \
604 encode_putfh_maxsz + \
605 encode_lockt_maxsz)
606 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
607 decode_sequence_maxsz + \
608 decode_putfh_maxsz + \
609 decode_lockt_maxsz)
610 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
611 encode_sequence_maxsz + \
612 encode_putfh_maxsz + \
613 encode_locku_maxsz)
614 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
615 decode_sequence_maxsz + \
616 decode_putfh_maxsz + \
617 decode_locku_maxsz)
618 #define NFS4_enc_release_lockowner_sz \
619 (compound_encode_hdr_maxsz + \
620 encode_lockowner_maxsz)
621 #define NFS4_dec_release_lockowner_sz \
622 (compound_decode_hdr_maxsz + \
623 decode_lockowner_maxsz)
624 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
625 encode_sequence_maxsz + \
626 encode_putfh_maxsz + \
627 encode_access_maxsz + \
628 encode_getattr_maxsz)
629 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
630 decode_sequence_maxsz + \
631 decode_putfh_maxsz + \
632 decode_access_maxsz + \
633 decode_getattr_maxsz)
634 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
635 encode_sequence_maxsz + \
636 encode_putfh_maxsz + \
637 encode_getattr_maxsz + \
638 encode_renew_maxsz)
639 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
640 decode_sequence_maxsz + \
641 decode_putfh_maxsz + \
642 decode_getattr_maxsz + \
643 decode_renew_maxsz)
644 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
645 encode_sequence_maxsz + \
646 encode_putfh_maxsz + \
647 encode_lookup_maxsz + \
648 encode_getattr_maxsz + \
649 encode_getfh_maxsz)
650 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
651 decode_sequence_maxsz + \
652 decode_putfh_maxsz + \
653 decode_lookup_maxsz + \
654 decode_getattr_maxsz + \
655 decode_getfh_maxsz)
656 #define NFS4_enc_lookupp_sz (compound_encode_hdr_maxsz + \
657 encode_sequence_maxsz + \
658 encode_putfh_maxsz + \
659 encode_lookupp_maxsz + \
660 encode_getattr_maxsz + \
661 encode_getfh_maxsz)
662 #define NFS4_dec_lookupp_sz (compound_decode_hdr_maxsz + \
663 decode_sequence_maxsz + \
664 decode_putfh_maxsz + \
665 decode_lookupp_maxsz + \
666 decode_getattr_maxsz + \
667 decode_getfh_maxsz)
668 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
669 encode_sequence_maxsz + \
670 encode_putrootfh_maxsz + \
671 encode_getattr_maxsz + \
672 encode_getfh_maxsz)
673 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
674 decode_sequence_maxsz + \
675 decode_putrootfh_maxsz + \
676 decode_getattr_maxsz + \
677 decode_getfh_maxsz)
678 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
679 encode_sequence_maxsz + \
680 encode_putfh_maxsz + \
681 encode_remove_maxsz)
682 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
683 decode_sequence_maxsz + \
684 decode_putfh_maxsz + \
685 decode_remove_maxsz)
686 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
687 encode_sequence_maxsz + \
688 encode_putfh_maxsz + \
689 encode_savefh_maxsz + \
690 encode_putfh_maxsz + \
691 encode_rename_maxsz)
692 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
693 decode_sequence_maxsz + \
694 decode_putfh_maxsz + \
695 decode_savefh_maxsz + \
696 decode_putfh_maxsz + \
697 decode_rename_maxsz)
698 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
699 encode_sequence_maxsz + \
700 encode_putfh_maxsz + \
701 encode_savefh_maxsz + \
702 encode_putfh_maxsz + \
703 encode_link_maxsz + \
704 encode_restorefh_maxsz + \
705 encode_getattr_maxsz)
706 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
707 decode_sequence_maxsz + \
708 decode_putfh_maxsz + \
709 decode_savefh_maxsz + \
710 decode_putfh_maxsz + \
711 decode_link_maxsz + \
712 decode_restorefh_maxsz + \
713 decode_getattr_maxsz)
714 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
715 encode_sequence_maxsz + \
716 encode_putfh_maxsz + \
717 encode_symlink_maxsz + \
718 encode_getattr_maxsz + \
719 encode_getfh_maxsz)
720 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
721 decode_sequence_maxsz + \
722 decode_putfh_maxsz + \
723 decode_symlink_maxsz + \
724 decode_getattr_maxsz + \
725 decode_getfh_maxsz)
726 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
727 encode_sequence_maxsz + \
728 encode_putfh_maxsz + \
729 encode_create_maxsz + \
730 encode_getfh_maxsz + \
731 encode_getattr_maxsz)
732 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
733 decode_sequence_maxsz + \
734 decode_putfh_maxsz + \
735 decode_create_maxsz + \
736 decode_getfh_maxsz + \
737 decode_getattr_maxsz)
738 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
739 encode_sequence_maxsz + \
740 encode_putfh_maxsz + \
741 encode_getattr_maxsz)
742 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
743 decode_sequence_maxsz + \
744 decode_putfh_maxsz + \
745 decode_getattr_maxsz)
746 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
747 encode_sequence_maxsz + \
748 encode_putfh_maxsz + \
749 encode_statfs_maxsz)
750 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
751 decode_sequence_maxsz + \
752 decode_putfh_maxsz + \
753 decode_statfs_maxsz)
754 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
755 encode_sequence_maxsz + \
756 encode_putfh_maxsz + \
757 encode_getattr_maxsz)
758 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
759 decode_sequence_maxsz + \
760 decode_putfh_maxsz + \
761 decode_getattr_maxsz)
762 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
763 encode_sequence_maxsz + \
764 encode_putfh_maxsz + \
765 encode_layoutreturn_maxsz + \
766 encode_delegattr_maxsz + \
767 encode_delegreturn_maxsz + \
768 encode_getattr_maxsz)
769 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
770 decode_sequence_maxsz + \
771 decode_putfh_maxsz + \
772 decode_layoutreturn_maxsz + \
773 decode_delegattr_maxsz + \
774 decode_delegreturn_maxsz + \
775 decode_getattr_maxsz)
776 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
777 encode_sequence_maxsz + \
778 encode_putfh_maxsz + \
779 encode_getacl_maxsz)
780 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
781 decode_sequence_maxsz + \
782 decode_putfh_maxsz + \
783 decode_getacl_maxsz)
784 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
785 encode_sequence_maxsz + \
786 encode_putfh_maxsz + \
787 encode_setacl_maxsz)
788 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
789 decode_sequence_maxsz + \
790 decode_putfh_maxsz + \
791 decode_setacl_maxsz)
792 #define NFS4_enc_fs_locations_sz \
793 (compound_encode_hdr_maxsz + \
794 encode_sequence_maxsz + \
795 encode_putfh_maxsz + \
796 encode_lookup_maxsz + \
797 encode_fs_locations_maxsz + \
798 encode_renew_maxsz)
799 #define NFS4_dec_fs_locations_sz \
800 (compound_decode_hdr_maxsz + \
801 decode_sequence_maxsz + \
802 decode_putfh_maxsz + \
803 decode_lookup_maxsz + \
804 decode_fs_locations_maxsz + \
805 decode_renew_maxsz)
806 #define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
807 encode_sequence_maxsz + \
808 encode_putfh_maxsz + \
809 encode_secinfo_maxsz)
810 #define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
811 decode_sequence_maxsz + \
812 decode_putfh_maxsz + \
813 decode_secinfo_maxsz)
814 #define NFS4_enc_fsid_present_sz \
815 (compound_encode_hdr_maxsz + \
816 encode_sequence_maxsz + \
817 encode_putfh_maxsz + \
818 encode_getfh_maxsz + \
819 encode_renew_maxsz)
820 #define NFS4_dec_fsid_present_sz \
821 (compound_decode_hdr_maxsz + \
822 decode_sequence_maxsz + \
823 decode_putfh_maxsz + \
824 decode_getfh_maxsz + \
825 decode_renew_maxsz)
826 #if defined(CONFIG_NFS_V4_1)
827 #define NFS4_enc_bind_conn_to_session_sz \
828 (compound_encode_hdr_maxsz + \
829 encode_bind_conn_to_session_maxsz)
830 #define NFS4_dec_bind_conn_to_session_sz \
831 (compound_decode_hdr_maxsz + \
832 decode_bind_conn_to_session_maxsz)
833 #define NFS4_enc_exchange_id_sz \
834 (compound_encode_hdr_maxsz + \
835 encode_exchange_id_maxsz)
836 #define NFS4_dec_exchange_id_sz \
837 (compound_decode_hdr_maxsz + \
838 decode_exchange_id_maxsz)
839 #define NFS4_enc_create_session_sz \
840 (compound_encode_hdr_maxsz + \
841 encode_create_session_maxsz)
842 #define NFS4_dec_create_session_sz \
843 (compound_decode_hdr_maxsz + \
844 decode_create_session_maxsz)
845 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
846 encode_destroy_session_maxsz)
847 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
848 decode_destroy_session_maxsz)
849 #define NFS4_enc_destroy_clientid_sz (compound_encode_hdr_maxsz + \
850 encode_destroy_clientid_maxsz)
851 #define NFS4_dec_destroy_clientid_sz (compound_decode_hdr_maxsz + \
852 decode_destroy_clientid_maxsz)
853 #define NFS4_enc_sequence_sz \
854 (compound_decode_hdr_maxsz + \
855 encode_sequence_maxsz)
856 #define NFS4_dec_sequence_sz \
857 (compound_decode_hdr_maxsz + \
858 decode_sequence_maxsz)
859 #endif
860 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
861 encode_sequence_maxsz + \
862 encode_putrootfh_maxsz + \
863 encode_fsinfo_maxsz)
864 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
865 decode_sequence_maxsz + \
866 decode_putrootfh_maxsz + \
867 decode_fsinfo_maxsz)
868 #if defined(CONFIG_NFS_V4_1)
869 #define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
870 encode_sequence_maxsz + \
871 encode_reclaim_complete_maxsz)
872 #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
873 decode_sequence_maxsz + \
874 decode_reclaim_complete_maxsz)
875 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
876 encode_sequence_maxsz +\
877 encode_getdeviceinfo_maxsz)
878 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
879 decode_sequence_maxsz + \
880 decode_getdeviceinfo_maxsz)
881 #define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
882 encode_sequence_maxsz + \
883 encode_putfh_maxsz + \
884 encode_layoutget_maxsz)
885 #define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
886 decode_sequence_maxsz + \
887 decode_putfh_maxsz + \
888 decode_layoutget_maxsz)
889 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
890 encode_sequence_maxsz +\
891 encode_putfh_maxsz + \
892 encode_layoutcommit_maxsz + \
893 encode_getattr_maxsz)
894 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
895 decode_sequence_maxsz + \
896 decode_putfh_maxsz + \
897 decode_layoutcommit_maxsz + \
898 decode_getattr_maxsz)
899 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
900 encode_sequence_maxsz + \
901 encode_putfh_maxsz + \
902 encode_layoutreturn_maxsz)
903 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
904 decode_sequence_maxsz + \
905 decode_putfh_maxsz + \
906 decode_layoutreturn_maxsz)
907 #define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
908 encode_sequence_maxsz + \
909 encode_putrootfh_maxsz +\
910 encode_secinfo_no_name_maxsz)
911 #define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
912 decode_sequence_maxsz + \
913 decode_putrootfh_maxsz + \
914 decode_secinfo_no_name_maxsz)
915 #define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
916 encode_sequence_maxsz + \
917 encode_test_stateid_maxsz)
918 #define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
919 decode_sequence_maxsz + \
920 decode_test_stateid_maxsz)
921 #define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \
922 encode_sequence_maxsz + \
923 encode_free_stateid_maxsz)
924 #define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
925 decode_sequence_maxsz + \
926 decode_free_stateid_maxsz)
927
928 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
929 compound_encode_hdr_maxsz +
930 encode_sequence_maxsz +
931 encode_putfh_maxsz +
932 encode_getattr_maxsz) *
933 XDR_UNIT);
934
935 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
936 compound_decode_hdr_maxsz +
937 decode_sequence_maxsz +
938 decode_putfh_maxsz) *
939 XDR_UNIT);
940
941 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
942 compound_decode_hdr_maxsz +
943 decode_sequence_maxsz) *
944 XDR_UNIT);
945 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
946 #endif /* CONFIG_NFS_V4_1 */
947
948 static const umode_t nfs_type2fmt[] = {
949 [NF4BAD] = 0,
950 [NF4REG] = S_IFREG,
951 [NF4DIR] = S_IFDIR,
952 [NF4BLK] = S_IFBLK,
953 [NF4CHR] = S_IFCHR,
954 [NF4LNK] = S_IFLNK,
955 [NF4SOCK] = S_IFSOCK,
956 [NF4FIFO] = S_IFIFO,
957 [NF4ATTRDIR] = 0,
958 [NF4NAMEDATTR] = 0,
959 };
960
961 struct compound_hdr {
962 int32_t status;
963 uint32_t nops;
964 __be32 * nops_p;
965 uint32_t taglen;
966 char * tag;
967 uint32_t replen; /* expected reply words */
968 u32 minorversion;
969 };
970
971 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
972 {
973 __be32 *p = xdr_reserve_space(xdr, nbytes);
974 BUG_ON(!p);
975 return p;
976 }
977
978 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
979 {
980 WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
981 }
982
983 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
984 {
985 WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0);
986 }
987
988 static void encode_uint32(struct xdr_stream *xdr, u32 n)
989 {
990 WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
991 }
992
993 static void encode_uint64(struct xdr_stream *xdr, u64 n)
994 {
995 WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0);
996 }
997
998 static ssize_t xdr_encode_bitmap4(struct xdr_stream *xdr,
999 const __u32 *bitmap, size_t len)
1000 {
1001 ssize_t ret;
1002
1003 /* Trim empty words */
1004 while (len > 0 && bitmap[len-1] == 0)
1005 len--;
1006 ret = xdr_stream_encode_uint32_array(xdr, bitmap, len);
1007 if (WARN_ON_ONCE(ret < 0))
1008 return ret;
1009 return len;
1010 }
1011
1012 static size_t mask_bitmap4(const __u32 *bitmap, const __u32 *mask,
1013 __u32 *res, size_t len)
1014 {
1015 size_t i;
1016 __u32 tmp;
1017
1018 while (len > 0 && (bitmap[len-1] == 0 || mask[len-1] == 0))
1019 len--;
1020 for (i = len; i-- > 0;) {
1021 tmp = bitmap[i] & mask[i];
1022 res[i] = tmp;
1023 }
1024 return len;
1025 }
1026
1027 static void encode_nfs4_seqid(struct xdr_stream *xdr,
1028 const struct nfs_seqid *seqid)
1029 {
1030 if (seqid != NULL)
1031 encode_uint32(xdr, seqid->sequence->counter);
1032 else
1033 encode_uint32(xdr, 0);
1034 }
1035
1036 static void encode_compound_hdr(struct xdr_stream *xdr,
1037 struct rpc_rqst *req,
1038 struct compound_hdr *hdr)
1039 {
1040 __be32 *p;
1041
1042 /* initialize running count of expected bytes in reply.
1043 * NOTE: the replied tag SHOULD be the same is the one sent,
1044 * but this is not required as a MUST for the server to do so. */
1045 hdr->replen = 3 + hdr->taglen;
1046
1047 WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
1048 encode_string(xdr, hdr->taglen, hdr->tag);
1049 p = reserve_space(xdr, 8);
1050 *p++ = cpu_to_be32(hdr->minorversion);
1051 hdr->nops_p = p;
1052 *p = cpu_to_be32(hdr->nops);
1053 }
1054
1055 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
1056 uint32_t replen,
1057 struct compound_hdr *hdr)
1058 {
1059 encode_uint32(xdr, op);
1060 hdr->nops++;
1061 hdr->replen += replen;
1062 }
1063
1064 static void encode_nops(struct compound_hdr *hdr)
1065 {
1066 WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
1067 *hdr->nops_p = htonl(hdr->nops);
1068 }
1069
1070 static void encode_nfs4_stateid(struct xdr_stream *xdr,
1071 const nfs4_stateid *stateid)
1072 {
1073 encode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
1074 }
1075
1076 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1077 {
1078 encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1079 }
1080
1081 static __be32 *
1082 xdr_encode_nfstime4(__be32 *p, const struct timespec64 *t)
1083 {
1084 p = xdr_encode_hyper(p, t->tv_sec);
1085 *p++ = cpu_to_be32(t->tv_nsec);
1086 return p;
1087 }
1088
1089 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1090 const struct nfs4_label *label,
1091 const umode_t *umask,
1092 const struct nfs_server *server,
1093 const uint32_t attrmask[])
1094 {
1095 char owner_name[IDMAP_NAMESZ];
1096 char owner_group[IDMAP_NAMESZ];
1097 int owner_namelen = 0;
1098 int owner_grouplen = 0;
1099 __be32 *p;
1100 uint32_t len = 0;
1101 uint32_t bmval[3] = { 0 };
1102
1103 /*
1104 * We reserve enough space to write the entire attribute buffer at once.
1105 */
1106 if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1107 bmval[0] |= FATTR4_WORD0_SIZE;
1108 len += 8;
1109 }
1110 if (iap->ia_valid & ATTR_MODE) {
1111 if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1112 bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1113 len += 8;
1114 } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1115 bmval[1] |= FATTR4_WORD1_MODE;
1116 len += 4;
1117 }
1118 }
1119 if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1120 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1121 if (owner_namelen < 0) {
1122 dprintk("nfs: couldn't resolve uid %d to string\n",
1123 from_kuid(&init_user_ns, iap->ia_uid));
1124 /* XXX */
1125 strcpy(owner_name, "nobody");
1126 owner_namelen = sizeof("nobody") - 1;
1127 /* goto out; */
1128 }
1129 bmval[1] |= FATTR4_WORD1_OWNER;
1130 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1131 }
1132 if ((iap->ia_valid & ATTR_GID) &&
1133 (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1134 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1135 if (owner_grouplen < 0) {
1136 dprintk("nfs: couldn't resolve gid %d to string\n",
1137 from_kgid(&init_user_ns, iap->ia_gid));
1138 strcpy(owner_group, "nobody");
1139 owner_grouplen = sizeof("nobody") - 1;
1140 /* goto out; */
1141 }
1142 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1143 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1144 }
1145 if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1146 if (iap->ia_valid & ATTR_ATIME_SET) {
1147 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1148 len += 4 + (nfstime4_maxsz << 2);
1149 } else if (iap->ia_valid & ATTR_ATIME) {
1150 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1151 len += 4;
1152 }
1153 }
1154 if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1155 if (iap->ia_valid & ATTR_MTIME_SET) {
1156 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1157 len += 4 + (nfstime4_maxsz << 2);
1158 } else if (iap->ia_valid & ATTR_MTIME) {
1159 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1160 len += 4;
1161 }
1162 }
1163
1164 if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1165 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1166 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1167 }
1168
1169 xdr_encode_bitmap4(xdr, bmval, ARRAY_SIZE(bmval));
1170 xdr_stream_encode_opaque_inline(xdr, (void **)&p, len);
1171
1172 if (bmval[0] & FATTR4_WORD0_SIZE)
1173 p = xdr_encode_hyper(p, iap->ia_size);
1174 if (bmval[1] & FATTR4_WORD1_MODE)
1175 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1176 if (bmval[1] & FATTR4_WORD1_OWNER)
1177 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1178 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1179 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1180 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1181 if (iap->ia_valid & ATTR_ATIME_SET) {
1182 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1183 p = xdr_encode_nfstime4(p, &iap->ia_atime);
1184 } else
1185 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1186 }
1187 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1188 if (iap->ia_valid & ATTR_MTIME_SET) {
1189 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1190 p = xdr_encode_nfstime4(p, &iap->ia_mtime);
1191 } else
1192 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1193 }
1194 if (label && (bmval[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1195 *p++ = cpu_to_be32(label->lfs);
1196 *p++ = cpu_to_be32(label->pi);
1197 *p++ = cpu_to_be32(label->len);
1198 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1199 }
1200 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1201 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1202 *p++ = cpu_to_be32(*umask);
1203 }
1204
1205 /* out: */
1206 }
1207
1208 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1209 {
1210 encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1211 encode_uint32(xdr, access);
1212 }
1213
1214 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1215 {
1216 encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1217 encode_nfs4_seqid(xdr, arg->seqid);
1218 encode_nfs4_stateid(xdr, &arg->stateid);
1219 }
1220
1221 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1222 {
1223 __be32 *p;
1224
1225 encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1226 p = reserve_space(xdr, 12);
1227 p = xdr_encode_hyper(p, args->offset);
1228 *p = cpu_to_be32(args->count);
1229 }
1230
1231 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1232 {
1233 __be32 *p;
1234
1235 encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1236 encode_uint32(xdr, create->ftype);
1237
1238 switch (create->ftype) {
1239 case NF4LNK:
1240 p = reserve_space(xdr, 4);
1241 *p = cpu_to_be32(create->u.symlink.len);
1242 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1243 create->u.symlink.len);
1244 xdr->buf->flags |= XDRBUF_WRITE;
1245 break;
1246
1247 case NF4BLK: case NF4CHR:
1248 p = reserve_space(xdr, 8);
1249 *p++ = cpu_to_be32(create->u.device.specdata1);
1250 *p = cpu_to_be32(create->u.device.specdata2);
1251 break;
1252
1253 default:
1254 break;
1255 }
1256
1257 encode_string(xdr, create->name->len, create->name->name);
1258 encode_attrs(xdr, create->attrs, create->label, &create->umask,
1259 create->server, create->server->attr_bitmask);
1260 }
1261
1262 static void encode_getattr(struct xdr_stream *xdr,
1263 const __u32 *bitmap, const __u32 *mask, size_t len,
1264 struct compound_hdr *hdr)
1265 {
1266 __u32 masked_bitmap[nfs4_fattr_bitmap_maxsz];
1267
1268 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1269 if (mask) {
1270 if (WARN_ON_ONCE(len > ARRAY_SIZE(masked_bitmap)))
1271 len = ARRAY_SIZE(masked_bitmap);
1272 len = mask_bitmap4(bitmap, mask, masked_bitmap, len);
1273 bitmap = masked_bitmap;
1274 }
1275 xdr_encode_bitmap4(xdr, bitmap, len);
1276 }
1277
1278 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1279 {
1280 encode_getattr(xdr, nfs4_fattr_bitmap, bitmask,
1281 ARRAY_SIZE(nfs4_fattr_bitmap), hdr);
1282 }
1283
1284 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1285 const u32 *open_bitmap,
1286 struct compound_hdr *hdr)
1287 {
1288 encode_getattr(xdr, open_bitmap, bitmask, 3, hdr);
1289 }
1290
1291 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1292 {
1293 encode_getattr(xdr, nfs4_fsinfo_bitmap, bitmask,
1294 ARRAY_SIZE(nfs4_fsinfo_bitmap), hdr);
1295 }
1296
1297 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1298 {
1299 encode_getattr(xdr, nfs4_fs_locations_bitmap, bitmask,
1300 ARRAY_SIZE(nfs4_fs_locations_bitmap), hdr);
1301 }
1302
1303 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1304 {
1305 encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1306 }
1307
1308 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1309 {
1310 encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1311 encode_string(xdr, name->len, name->name);
1312 }
1313
1314 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1315 {
1316 if (lock_is_read(fl))
1317 return block ? NFS4_READW_LT : NFS4_READ_LT;
1318 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1319 }
1320
1321 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1322 {
1323 if (fl->fl_end == OFFSET_MAX)
1324 return ~(uint64_t)0;
1325 return fl->fl_end - fl->fl_start + 1;
1326 }
1327
1328 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1329 {
1330 __be32 *p;
1331
1332 p = reserve_space(xdr, 32);
1333 p = xdr_encode_hyper(p, lowner->clientid);
1334 *p++ = cpu_to_be32(20);
1335 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1336 *p++ = cpu_to_be32(lowner->s_dev);
1337 xdr_encode_hyper(p, lowner->id);
1338 }
1339
1340 /*
1341 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1342 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1343 */
1344 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1345 {
1346 __be32 *p;
1347
1348 encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1349 p = reserve_space(xdr, 28);
1350 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1351 *p++ = cpu_to_be32(args->reclaim);
1352 p = xdr_encode_hyper(p, args->fl->fl_start);
1353 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1354 *p = cpu_to_be32(args->new_lock_owner);
1355 if (args->new_lock_owner){
1356 encode_nfs4_seqid(xdr, args->open_seqid);
1357 encode_nfs4_stateid(xdr, &args->open_stateid);
1358 encode_nfs4_seqid(xdr, args->lock_seqid);
1359 encode_lockowner(xdr, &args->lock_owner);
1360 }
1361 else {
1362 encode_nfs4_stateid(xdr, &args->lock_stateid);
1363 encode_nfs4_seqid(xdr, args->lock_seqid);
1364 }
1365 }
1366
1367 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1368 {
1369 __be32 *p;
1370
1371 encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1372 p = reserve_space(xdr, 20);
1373 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1374 p = xdr_encode_hyper(p, args->fl->fl_start);
1375 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1376 encode_lockowner(xdr, &args->lock_owner);
1377 }
1378
1379 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1380 {
1381 __be32 *p;
1382
1383 encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1384 encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1385 encode_nfs4_seqid(xdr, args->seqid);
1386 encode_nfs4_stateid(xdr, &args->stateid);
1387 p = reserve_space(xdr, 16);
1388 p = xdr_encode_hyper(p, args->fl->fl_start);
1389 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1390 }
1391
1392 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1393 {
1394 encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1395 encode_lockowner(xdr, lowner);
1396 }
1397
1398 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1399 {
1400 encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1401 encode_string(xdr, name->len, name->name);
1402 }
1403
1404 static void encode_lookupp(struct xdr_stream *xdr, struct compound_hdr *hdr)
1405 {
1406 encode_op_hdr(xdr, OP_LOOKUPP, decode_lookupp_maxsz, hdr);
1407 }
1408
1409 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1410 {
1411 __be32 *p;
1412
1413 p = reserve_space(xdr, 8);
1414 *p++ = cpu_to_be32(share_access);
1415 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1416 }
1417
1418 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1419 {
1420 __be32 *p;
1421 /*
1422 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1423 * owner 4 = 32
1424 */
1425 encode_nfs4_seqid(xdr, arg->seqid);
1426 encode_share_access(xdr, arg->share_access);
1427 p = reserve_space(xdr, 36);
1428 p = xdr_encode_hyper(p, arg->clientid);
1429 *p++ = cpu_to_be32(24);
1430 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1431 *p++ = cpu_to_be32(arg->server->s_dev);
1432 *p++ = cpu_to_be32(arg->id.uniquifier);
1433 xdr_encode_hyper(p, arg->id.create_time);
1434 }
1435
1436 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1437 {
1438 __be32 *p;
1439
1440 p = reserve_space(xdr, 4);
1441 switch(arg->createmode) {
1442 case NFS4_CREATE_UNCHECKED:
1443 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1444 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1445 arg->server, arg->server->attr_bitmask);
1446 break;
1447 case NFS4_CREATE_GUARDED:
1448 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1449 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1450 arg->server, arg->server->attr_bitmask);
1451 break;
1452 case NFS4_CREATE_EXCLUSIVE:
1453 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1454 encode_nfs4_verifier(xdr, &arg->u.verifier);
1455 break;
1456 case NFS4_CREATE_EXCLUSIVE4_1:
1457 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1458 encode_nfs4_verifier(xdr, &arg->u.verifier);
1459 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1460 arg->server, arg->server->exclcreat_bitmask);
1461 }
1462 }
1463
1464 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1465 {
1466 __be32 *p;
1467
1468 p = reserve_space(xdr, 4);
1469 switch (arg->open_flags & O_CREAT) {
1470 case 0:
1471 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1472 break;
1473 default:
1474 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1475 encode_createmode(xdr, arg);
1476 }
1477 }
1478
1479 static inline void encode_delegation_type(struct xdr_stream *xdr, u32 delegation_type)
1480 {
1481 __be32 *p;
1482
1483 p = reserve_space(xdr, 4);
1484 switch (delegation_type) {
1485 case NFS4_OPEN_DELEGATE_NONE:
1486 case NFS4_OPEN_DELEGATE_READ:
1487 case NFS4_OPEN_DELEGATE_WRITE:
1488 case NFS4_OPEN_DELEGATE_READ_ATTRS_DELEG:
1489 case NFS4_OPEN_DELEGATE_WRITE_ATTRS_DELEG:
1490 *p = cpu_to_be32(delegation_type);
1491 break;
1492 default:
1493 BUG();
1494 }
1495 }
1496
1497 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1498 {
1499 __be32 *p;
1500
1501 p = reserve_space(xdr, 4);
1502 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1503 encode_string(xdr, name->len, name->name);
1504 }
1505
1506 static inline void encode_claim_previous(struct xdr_stream *xdr, u32 type)
1507 {
1508 __be32 *p;
1509
1510 p = reserve_space(xdr, 4);
1511 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1512 encode_delegation_type(xdr, type);
1513 }
1514
1515 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1516 {
1517 __be32 *p;
1518
1519 p = reserve_space(xdr, 4);
1520 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1521 encode_nfs4_stateid(xdr, stateid);
1522 encode_string(xdr, name->len, name->name);
1523 }
1524
1525 static inline void encode_claim_fh(struct xdr_stream *xdr)
1526 {
1527 __be32 *p;
1528
1529 p = reserve_space(xdr, 4);
1530 *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1531 }
1532
1533 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1534 {
1535 __be32 *p;
1536
1537 p = reserve_space(xdr, 4);
1538 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1539 encode_nfs4_stateid(xdr, stateid);
1540 }
1541
1542 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1543 {
1544 encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1545 encode_openhdr(xdr, arg);
1546 encode_opentype(xdr, arg);
1547 switch (arg->claim) {
1548 case NFS4_OPEN_CLAIM_NULL:
1549 encode_claim_null(xdr, arg->name);
1550 break;
1551 case NFS4_OPEN_CLAIM_PREVIOUS:
1552 encode_claim_previous(xdr, arg->u.delegation_type);
1553 break;
1554 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1555 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1556 break;
1557 case NFS4_OPEN_CLAIM_FH:
1558 encode_claim_fh(xdr);
1559 break;
1560 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1561 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1562 break;
1563 default:
1564 BUG();
1565 }
1566 }
1567
1568 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1569 {
1570 encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1571 encode_nfs4_stateid(xdr, arg->stateid);
1572 encode_nfs4_seqid(xdr, arg->seqid);
1573 }
1574
1575 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1576 {
1577 encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1578 encode_nfs4_stateid(xdr, &arg->stateid);
1579 encode_nfs4_seqid(xdr, arg->seqid);
1580 encode_share_access(xdr, arg->share_access);
1581 }
1582
1583 static void
1584 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1585 {
1586 encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1587 encode_string(xdr, fh->size, fh->data);
1588 }
1589
1590 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1591 {
1592 encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1593 }
1594
1595 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1596 struct compound_hdr *hdr)
1597 {
1598 __be32 *p;
1599
1600 encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1601 encode_nfs4_stateid(xdr, &args->stateid);
1602
1603 p = reserve_space(xdr, 12);
1604 p = xdr_encode_hyper(p, args->offset);
1605 *p = cpu_to_be32(args->count);
1606 }
1607
1608 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1609 {
1610 uint32_t attrs[3] = {
1611 FATTR4_WORD0_TYPE
1612 | FATTR4_WORD0_RDATTR_ERROR,
1613 FATTR4_WORD1_MOUNTED_ON_FILEID,
1614 };
1615 uint32_t dircount = readdir->count;
1616 uint32_t maxcount = readdir->count;
1617 __be32 *p, verf[2];
1618 uint32_t attrlen = 0;
1619 unsigned int i;
1620
1621 if (readdir->plus) {
1622 attrs[0] |= FATTR4_WORD0_CHANGE
1623 | FATTR4_WORD0_SIZE
1624 | FATTR4_WORD0_FSID
1625 | FATTR4_WORD0_FILEHANDLE
1626 | FATTR4_WORD0_FILEID;
1627 attrs[1] |= FATTR4_WORD1_MODE
1628 | FATTR4_WORD1_NUMLINKS
1629 | FATTR4_WORD1_OWNER
1630 | FATTR4_WORD1_OWNER_GROUP
1631 | FATTR4_WORD1_RAWDEV
1632 | FATTR4_WORD1_SPACE_USED
1633 | FATTR4_WORD1_TIME_ACCESS
1634 | FATTR4_WORD1_TIME_METADATA
1635 | FATTR4_WORD1_TIME_MODIFY;
1636 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1637 }
1638 /* Use mounted_on_fileid only if the server supports it */
1639 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1640 attrs[0] |= FATTR4_WORD0_FILEID;
1641 for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1642 attrs[i] &= readdir->bitmask[i];
1643 if (attrs[i] != 0)
1644 attrlen = i+1;
1645 }
1646
1647 encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1648 encode_uint64(xdr, readdir->cookie);
1649 encode_nfs4_verifier(xdr, &readdir->verifier);
1650 p = reserve_space(xdr, 12 + (attrlen << 2));
1651 *p++ = cpu_to_be32(dircount);
1652 *p++ = cpu_to_be32(maxcount);
1653 *p++ = cpu_to_be32(attrlen);
1654 for (i = 0; i < attrlen; i++)
1655 *p++ = cpu_to_be32(attrs[i]);
1656 memcpy(verf, readdir->verifier.data, sizeof(verf));
1657
1658 dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1659 __func__,
1660 (unsigned long long)readdir->cookie,
1661 verf[0], verf[1],
1662 attrs[0] & readdir->bitmask[0],
1663 attrs[1] & readdir->bitmask[1],
1664 attrs[2] & readdir->bitmask[2]);
1665 }
1666
1667 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1668 {
1669 encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1670 }
1671
1672 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1673 {
1674 encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1675 encode_string(xdr, name->len, name->name);
1676 }
1677
1678 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1679 {
1680 encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1681 encode_string(xdr, oldname->len, oldname->name);
1682 encode_string(xdr, newname->len, newname->name);
1683 }
1684
1685 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1686 struct compound_hdr *hdr)
1687 {
1688 encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1689 encode_uint64(xdr, clid);
1690 }
1691
1692 static void
1693 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1694 {
1695 encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1696 }
1697
1698 static void nfs4_acltype_to_bitmap(enum nfs4_acl_type type, __u32 bitmap[2])
1699 {
1700 switch (type) {
1701 default:
1702 bitmap[0] = FATTR4_WORD0_ACL;
1703 bitmap[1] = 0;
1704 break;
1705 case NFS4ACL_DACL:
1706 bitmap[0] = 0;
1707 bitmap[1] = FATTR4_WORD1_DACL;
1708 break;
1709 case NFS4ACL_SACL:
1710 bitmap[0] = 0;
1711 bitmap[1] = FATTR4_WORD1_SACL;
1712 }
1713 }
1714
1715 static void encode_setacl(struct xdr_stream *xdr,
1716 const struct nfs_setaclargs *arg,
1717 struct compound_hdr *hdr)
1718 {
1719 __u32 bitmap[2];
1720
1721 nfs4_acltype_to_bitmap(arg->acl_type, bitmap);
1722
1723 encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1724 encode_nfs4_stateid(xdr, &zero_stateid);
1725 xdr_encode_bitmap4(xdr, bitmap, ARRAY_SIZE(bitmap));
1726 encode_uint32(xdr, arg->acl_len);
1727 xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1728 }
1729
1730 static void
1731 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1732 {
1733 encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1734 }
1735
1736 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1737 {
1738 encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1739 encode_nfs4_stateid(xdr, &arg->stateid);
1740 encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1741 server->attr_bitmask);
1742 }
1743
1744 static void encode_delegattr(struct xdr_stream *xdr,
1745 const nfs4_stateid *stateid,
1746 const struct nfs4_delegattr *attr,
1747 struct compound_hdr *hdr)
1748 {
1749 uint32_t bitmap[3] = { 0 };
1750 uint32_t len = 0;
1751 __be32 *p;
1752
1753 encode_op_hdr(xdr, OP_SETATTR, encode_delegattr_maxsz, hdr);
1754 encode_nfs4_stateid(xdr, stateid);
1755 if (attr->atime_set) {
1756 bitmap[2] |= FATTR4_WORD2_TIME_DELEG_ACCESS;
1757 len += (nfstime4_maxsz << 2);
1758 }
1759 if (attr->mtime_set) {
1760 bitmap[2] |= FATTR4_WORD2_TIME_DELEG_MODIFY;
1761 len += (nfstime4_maxsz << 2);
1762 }
1763 xdr_encode_bitmap4(xdr, bitmap, ARRAY_SIZE(bitmap));
1764 xdr_stream_encode_opaque_inline(xdr, (void **)&p, len);
1765 if (bitmap[2] & FATTR4_WORD2_TIME_DELEG_ACCESS)
1766 p = xdr_encode_nfstime4(p, &attr->atime);
1767 if (bitmap[2] & FATTR4_WORD2_TIME_DELEG_MODIFY)
1768 p = xdr_encode_nfstime4(p, &attr->mtime);
1769 }
1770
1771 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1772 {
1773 __be32 *p;
1774
1775 encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1776 encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1777
1778 encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1779 setclientid->sc_clnt->cl_owner_id);
1780 p = reserve_space(xdr, 4);
1781 *p = cpu_to_be32(setclientid->sc_prog);
1782 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1783 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1784 p = reserve_space(xdr, 4);
1785 *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1786 }
1787
1788 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1789 {
1790 encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1791 decode_setclientid_confirm_maxsz, hdr);
1792 encode_uint64(xdr, arg->clientid);
1793 encode_nfs4_verifier(xdr, &arg->confirm);
1794 }
1795
1796 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1797 struct compound_hdr *hdr)
1798 {
1799 __be32 *p;
1800
1801 encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1802 encode_nfs4_stateid(xdr, &args->stateid);
1803
1804 p = reserve_space(xdr, 16);
1805 p = xdr_encode_hyper(p, args->offset);
1806 *p++ = cpu_to_be32(args->stable);
1807 *p = cpu_to_be32(args->count);
1808
1809 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1810 }
1811
1812 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1813 {
1814 encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1815 encode_nfs4_stateid(xdr, stateid);
1816 }
1817
1818 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1819 {
1820 encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1821 encode_string(xdr, name->len, name->name);
1822 }
1823
1824 #if defined(CONFIG_NFS_V4_1)
1825 /* NFSv4.1 operations */
1826 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1827 const struct nfs41_bind_conn_to_session_args *args,
1828 struct compound_hdr *hdr)
1829 {
1830 __be32 *p;
1831
1832 encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1833 decode_bind_conn_to_session_maxsz, hdr);
1834 encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1835 p = xdr_reserve_space(xdr, 8);
1836 *p++ = cpu_to_be32(args->dir);
1837 *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1838 }
1839
1840 static void encode_op_map(struct xdr_stream *xdr, const struct nfs4_op_map *op_map)
1841 {
1842 unsigned int i;
1843 encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1844 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1845 encode_uint32(xdr, op_map->u.words[i]);
1846 }
1847
1848 static void encode_exchange_id(struct xdr_stream *xdr,
1849 const struct nfs41_exchange_id_args *args,
1850 struct compound_hdr *hdr)
1851 {
1852 __be32 *p;
1853 char impl_name[IMPL_NAME_LIMIT];
1854 int len = 0;
1855
1856 encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1857 encode_nfs4_verifier(xdr, &args->verifier);
1858
1859 encode_string(xdr, strlen(args->client->cl_owner_id),
1860 args->client->cl_owner_id);
1861
1862 encode_uint32(xdr, args->flags);
1863 encode_uint32(xdr, args->state_protect.how);
1864
1865 switch (args->state_protect.how) {
1866 case SP4_NONE:
1867 break;
1868 case SP4_MACH_CRED:
1869 encode_op_map(xdr, &args->state_protect.enforce);
1870 encode_op_map(xdr, &args->state_protect.allow);
1871 break;
1872 default:
1873 WARN_ON_ONCE(1);
1874 break;
1875 }
1876
1877 if (send_implementation_id &&
1878 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1879 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1880 <= sizeof(impl_name) + 1)
1881 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1882 utsname()->sysname, utsname()->release,
1883 utsname()->version, utsname()->machine);
1884
1885 if (len > 0) {
1886 encode_uint32(xdr, 1); /* implementation id array length=1 */
1887
1888 encode_string(xdr,
1889 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1890 CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1891 encode_string(xdr, len, impl_name);
1892 /* just send zeros for nii_date - the date is in nii_name */
1893 p = reserve_space(xdr, 12);
1894 p = xdr_encode_hyper(p, 0);
1895 *p = cpu_to_be32(0);
1896 } else
1897 encode_uint32(xdr, 0); /* implementation id array length=0 */
1898 }
1899
1900 static void encode_create_session(struct xdr_stream *xdr,
1901 const struct nfs41_create_session_args *args,
1902 struct compound_hdr *hdr)
1903 {
1904 __be32 *p;
1905 struct nfs_client *clp = args->client;
1906 struct rpc_clnt *clnt = clp->cl_rpcclient;
1907 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1908 u32 max_resp_sz_cached;
1909
1910 /*
1911 * Assumes OPEN is the biggest non-idempotent compound.
1912 * 2 is the verifier.
1913 */
1914 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE + 2)
1915 * XDR_UNIT + RPC_MAX_AUTH_SIZE;
1916
1917 encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1918 p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1919 p = xdr_encode_hyper(p, args->clientid);
1920 *p++ = cpu_to_be32(args->seqid); /*Sequence id */
1921 *p++ = cpu_to_be32(args->flags); /*flags */
1922
1923 /* Fore Channel */
1924 *p++ = cpu_to_be32(0); /* header padding size */
1925 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1926 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1927 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1928 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1929 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1930 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1931
1932 /* Back Channel */
1933 *p++ = cpu_to_be32(0); /* header padding size */
1934 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1935 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1936 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1937 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1938 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1939 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1940
1941 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1942 *p++ = cpu_to_be32(1);
1943 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1944
1945 /* authsys_parms rfc1831 */
1946 *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1947 p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1948 *p++ = cpu_to_be32(0); /* UID */
1949 *p++ = cpu_to_be32(0); /* GID */
1950 *p = cpu_to_be32(0); /* No more gids */
1951 }
1952
1953 static void encode_destroy_session(struct xdr_stream *xdr,
1954 const struct nfs4_session *session,
1955 struct compound_hdr *hdr)
1956 {
1957 encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1958 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1959 }
1960
1961 static void encode_destroy_clientid(struct xdr_stream *xdr,
1962 uint64_t clientid,
1963 struct compound_hdr *hdr)
1964 {
1965 encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1966 encode_uint64(xdr, clientid);
1967 }
1968
1969 static void encode_reclaim_complete(struct xdr_stream *xdr,
1970 const struct nfs41_reclaim_complete_args *args,
1971 struct compound_hdr *hdr)
1972 {
1973 encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1974 encode_uint32(xdr, args->one_fs);
1975 }
1976 #endif /* CONFIG_NFS_V4_1 */
1977
1978 static void encode_sequence(struct xdr_stream *xdr,
1979 const struct nfs4_sequence_args *args,
1980 struct compound_hdr *hdr)
1981 {
1982 #if defined(CONFIG_NFS_V4_1)
1983 struct nfs4_session *session;
1984 struct nfs4_slot_table *tp;
1985 struct nfs4_slot *slot = args->sa_slot;
1986 __be32 *p;
1987
1988 tp = slot->table;
1989 session = tp->session;
1990 if (!session)
1991 return;
1992
1993 encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1994
1995 /*
1996 * Sessionid + seqid + slotid + max slotid + cache_this
1997 */
1998 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1999 "max_slotid=%d cache_this=%d\n",
2000 __func__,
2001 ((u32 *)session->sess_id.data)[0],
2002 ((u32 *)session->sess_id.data)[1],
2003 ((u32 *)session->sess_id.data)[2],
2004 ((u32 *)session->sess_id.data)[3],
2005 slot->seq_nr, slot->slot_nr,
2006 tp->highest_used_slotid, args->sa_cache_this);
2007 p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
2008 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
2009 *p++ = cpu_to_be32(slot->seq_nr);
2010 *p++ = cpu_to_be32(slot->slot_nr);
2011 *p++ = cpu_to_be32(tp->highest_used_slotid);
2012 *p = cpu_to_be32(args->sa_cache_this);
2013 #endif /* CONFIG_NFS_V4_1 */
2014 }
2015
2016 #ifdef CONFIG_NFS_V4_1
2017 static void
2018 encode_getdeviceinfo(struct xdr_stream *xdr,
2019 const struct nfs4_getdeviceinfo_args *args,
2020 struct compound_hdr *hdr)
2021 {
2022 __be32 *p;
2023
2024 encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
2025 p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
2026 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
2027 NFS4_DEVICEID4_SIZE);
2028 *p++ = cpu_to_be32(args->pdev->layout_type);
2029 *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */
2030
2031 p = reserve_space(xdr, 4 + 4);
2032 *p++ = cpu_to_be32(1); /* bitmap length */
2033 *p++ = cpu_to_be32(args->notify_types);
2034 }
2035
2036 static void
2037 encode_layoutget(struct xdr_stream *xdr,
2038 const struct nfs4_layoutget_args *args,
2039 struct compound_hdr *hdr)
2040 {
2041 __be32 *p;
2042
2043 encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
2044 p = reserve_space(xdr, 36);
2045 *p++ = cpu_to_be32(0); /* Signal layout available */
2046 *p++ = cpu_to_be32(args->type);
2047 *p++ = cpu_to_be32(args->range.iomode);
2048 p = xdr_encode_hyper(p, args->range.offset);
2049 p = xdr_encode_hyper(p, args->range.length);
2050 p = xdr_encode_hyper(p, args->minlength);
2051 encode_nfs4_stateid(xdr, &args->stateid);
2052 encode_uint32(xdr, args->maxcount);
2053
2054 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
2055 __func__,
2056 args->type,
2057 args->range.iomode,
2058 (unsigned long)args->range.offset,
2059 (unsigned long)args->range.length,
2060 args->maxcount);
2061 }
2062
2063 static int
2064 encode_layoutcommit(struct xdr_stream *xdr,
2065 struct inode *inode,
2066 const struct nfs4_layoutcommit_args *args,
2067 struct compound_hdr *hdr)
2068 {
2069 __be32 *p;
2070
2071 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
2072 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
2073
2074 encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2075 p = reserve_space(xdr, 20);
2076 /* Only whole file layouts */
2077 p = xdr_encode_hyper(p, 0); /* offset */
2078 p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
2079 *p = cpu_to_be32(0); /* reclaim */
2080 encode_nfs4_stateid(xdr, &args->stateid);
2081 if (args->lastbytewritten != U64_MAX) {
2082 p = reserve_space(xdr, 20);
2083 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2084 p = xdr_encode_hyper(p, args->lastbytewritten);
2085 } else {
2086 p = reserve_space(xdr, 12);
2087 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2088 }
2089 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2090 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2091
2092 encode_uint32(xdr, args->layoutupdate_len);
2093 if (args->layoutupdate_pages)
2094 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2095 args->layoutupdate_len);
2096
2097 return 0;
2098 }
2099
2100 static void
2101 encode_layoutreturn(struct xdr_stream *xdr,
2102 const struct nfs4_layoutreturn_args *args,
2103 struct compound_hdr *hdr)
2104 {
2105 __be32 *p;
2106
2107 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2108 p = reserve_space(xdr, 16);
2109 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
2110 *p++ = cpu_to_be32(args->layout_type);
2111 *p++ = cpu_to_be32(args->range.iomode);
2112 *p = cpu_to_be32(RETURN_FILE);
2113 p = reserve_space(xdr, 16);
2114 p = xdr_encode_hyper(p, args->range.offset);
2115 p = xdr_encode_hyper(p, args->range.length);
2116 spin_lock(&args->inode->i_lock);
2117 encode_nfs4_stateid(xdr, &args->stateid);
2118 spin_unlock(&args->inode->i_lock);
2119 if (args->ld_private->ops && args->ld_private->ops->encode)
2120 args->ld_private->ops->encode(xdr, args, args->ld_private);
2121 else
2122 encode_uint32(xdr, 0);
2123 }
2124
2125 static int
2126 encode_secinfo_no_name(struct xdr_stream *xdr,
2127 const struct nfs41_secinfo_no_name_args *args,
2128 struct compound_hdr *hdr)
2129 {
2130 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2131 encode_uint32(xdr, args->style);
2132 return 0;
2133 }
2134
2135 static void encode_test_stateid(struct xdr_stream *xdr,
2136 const struct nfs41_test_stateid_args *args,
2137 struct compound_hdr *hdr)
2138 {
2139 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2140 encode_uint32(xdr, 1);
2141 encode_nfs4_stateid(xdr, &args->stateid);
2142 }
2143
2144 static void encode_free_stateid(struct xdr_stream *xdr,
2145 const struct nfs41_free_stateid_args *args,
2146 struct compound_hdr *hdr)
2147 {
2148 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2149 encode_nfs4_stateid(xdr, &args->stateid);
2150 }
2151 #else
2152 static inline void
2153 encode_layoutreturn(struct xdr_stream *xdr,
2154 const struct nfs4_layoutreturn_args *args,
2155 struct compound_hdr *hdr)
2156 {
2157 }
2158
2159 static void
2160 encode_layoutget(struct xdr_stream *xdr,
2161 const struct nfs4_layoutget_args *args,
2162 struct compound_hdr *hdr)
2163 {
2164 }
2165 #endif /* CONFIG_NFS_V4_1 */
2166
2167 /*
2168 * END OF "GENERIC" ENCODE ROUTINES.
2169 */
2170
2171 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2172 {
2173 #if defined(CONFIG_NFS_V4_1)
2174 struct nfs4_session *session = args->sa_slot->table->session;
2175 if (session)
2176 return session->clp->cl_mvops->minor_version;
2177 #endif /* CONFIG_NFS_V4_1 */
2178 return 0;
2179 }
2180
2181 /*
2182 * Encode an ACCESS request
2183 */
2184 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2185 const void *data)
2186 {
2187 const struct nfs4_accessargs *args = data;
2188 struct compound_hdr hdr = {
2189 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2190 };
2191
2192 encode_compound_hdr(xdr, req, &hdr);
2193 encode_sequence(xdr, &args->seq_args, &hdr);
2194 encode_putfh(xdr, args->fh, &hdr);
2195 encode_access(xdr, args->access, &hdr);
2196 if (args->bitmask)
2197 encode_getfattr(xdr, args->bitmask, &hdr);
2198 encode_nops(&hdr);
2199 }
2200
2201 /*
2202 * Encode LOOKUP request
2203 */
2204 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2205 const void *data)
2206 {
2207 const struct nfs4_lookup_arg *args = data;
2208 struct compound_hdr hdr = {
2209 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2210 };
2211
2212 encode_compound_hdr(xdr, req, &hdr);
2213 encode_sequence(xdr, &args->seq_args, &hdr);
2214 encode_putfh(xdr, args->dir_fh, &hdr);
2215 encode_lookup(xdr, args->name, &hdr);
2216 encode_getfh(xdr, &hdr);
2217 encode_getfattr(xdr, args->bitmask, &hdr);
2218 encode_nops(&hdr);
2219 }
2220
2221 /*
2222 * Encode LOOKUPP request
2223 */
2224 static void nfs4_xdr_enc_lookupp(struct rpc_rqst *req, struct xdr_stream *xdr,
2225 const void *data)
2226 {
2227 const struct nfs4_lookupp_arg *args = data;
2228 struct compound_hdr hdr = {
2229 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2230 };
2231
2232 encode_compound_hdr(xdr, req, &hdr);
2233 encode_sequence(xdr, &args->seq_args, &hdr);
2234 encode_putfh(xdr, args->fh, &hdr);
2235 encode_lookupp(xdr, &hdr);
2236 encode_getfh(xdr, &hdr);
2237 encode_getfattr(xdr, args->bitmask, &hdr);
2238 encode_nops(&hdr);
2239 }
2240
2241 /*
2242 * Encode LOOKUP_ROOT request
2243 */
2244 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2245 struct xdr_stream *xdr,
2246 const void *data)
2247 {
2248 const struct nfs4_lookup_root_arg *args = data;
2249 struct compound_hdr hdr = {
2250 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2251 };
2252
2253 encode_compound_hdr(xdr, req, &hdr);
2254 encode_sequence(xdr, &args->seq_args, &hdr);
2255 encode_putrootfh(xdr, &hdr);
2256 encode_getfh(xdr, &hdr);
2257 encode_getfattr(xdr, args->bitmask, &hdr);
2258 encode_nops(&hdr);
2259 }
2260
2261 /*
2262 * Encode REMOVE request
2263 */
2264 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2265 const void *data)
2266 {
2267 const struct nfs_removeargs *args = data;
2268 struct compound_hdr hdr = {
2269 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2270 };
2271
2272 encode_compound_hdr(xdr, req, &hdr);
2273 encode_sequence(xdr, &args->seq_args, &hdr);
2274 encode_putfh(xdr, args->fh, &hdr);
2275 encode_remove(xdr, &args->name, &hdr);
2276 encode_nops(&hdr);
2277 }
2278
2279 /*
2280 * Encode RENAME request
2281 */
2282 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2283 const void *data)
2284 {
2285 const struct nfs_renameargs *args = data;
2286 struct compound_hdr hdr = {
2287 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2288 };
2289
2290 encode_compound_hdr(xdr, req, &hdr);
2291 encode_sequence(xdr, &args->seq_args, &hdr);
2292 encode_putfh(xdr, args->old_dir, &hdr);
2293 encode_savefh(xdr, &hdr);
2294 encode_putfh(xdr, args->new_dir, &hdr);
2295 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2296 encode_nops(&hdr);
2297 }
2298
2299 /*
2300 * Encode LINK request
2301 */
2302 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2303 const void *data)
2304 {
2305 const struct nfs4_link_arg *args = data;
2306 struct compound_hdr hdr = {
2307 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2308 };
2309
2310 encode_compound_hdr(xdr, req, &hdr);
2311 encode_sequence(xdr, &args->seq_args, &hdr);
2312 encode_putfh(xdr, args->fh, &hdr);
2313 encode_savefh(xdr, &hdr);
2314 encode_putfh(xdr, args->dir_fh, &hdr);
2315 encode_link(xdr, args->name, &hdr);
2316 encode_restorefh(xdr, &hdr);
2317 encode_getfattr(xdr, args->bitmask, &hdr);
2318 encode_nops(&hdr);
2319 }
2320
2321 /*
2322 * Encode CREATE request
2323 */
2324 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2325 const void *data)
2326 {
2327 const struct nfs4_create_arg *args = data;
2328 struct compound_hdr hdr = {
2329 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2330 };
2331
2332 encode_compound_hdr(xdr, req, &hdr);
2333 encode_sequence(xdr, &args->seq_args, &hdr);
2334 encode_putfh(xdr, args->dir_fh, &hdr);
2335 encode_create(xdr, args, &hdr);
2336 encode_getfh(xdr, &hdr);
2337 encode_getfattr(xdr, args->bitmask, &hdr);
2338 encode_nops(&hdr);
2339 }
2340
2341 /*
2342 * Encode SYMLINK request
2343 */
2344 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2345 const void *data)
2346 {
2347 const struct nfs4_create_arg *args = data;
2348
2349 nfs4_xdr_enc_create(req, xdr, args);
2350 }
2351
2352 /*
2353 * Encode GETATTR request
2354 */
2355 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2356 const void *data)
2357 {
2358 const struct nfs4_getattr_arg *args = data;
2359 struct compound_hdr hdr = {
2360 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2361 };
2362
2363 encode_compound_hdr(xdr, req, &hdr);
2364 encode_sequence(xdr, &args->seq_args, &hdr);
2365 encode_putfh(xdr, args->fh, &hdr);
2366 encode_getfattr(xdr, args->bitmask, &hdr);
2367 encode_nops(&hdr);
2368 }
2369
2370 /*
2371 * Encode a CLOSE request
2372 */
2373 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2374 const void *data)
2375 {
2376 const struct nfs_closeargs *args = data;
2377 struct compound_hdr hdr = {
2378 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2379 };
2380
2381 encode_compound_hdr(xdr, req, &hdr);
2382 encode_sequence(xdr, &args->seq_args, &hdr);
2383 encode_putfh(xdr, args->fh, &hdr);
2384 if (args->lr_args)
2385 encode_layoutreturn(xdr, args->lr_args, &hdr);
2386 if (args->bitmask != NULL)
2387 encode_getfattr(xdr, args->bitmask, &hdr);
2388 encode_close(xdr, args, &hdr);
2389 encode_nops(&hdr);
2390 }
2391
2392 /*
2393 * Encode an OPEN request
2394 */
2395 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2396 const void *data)
2397 {
2398 const struct nfs_openargs *args = data;
2399 struct compound_hdr hdr = {
2400 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2401 };
2402
2403 encode_compound_hdr(xdr, req, &hdr);
2404 encode_sequence(xdr, &args->seq_args, &hdr);
2405 encode_putfh(xdr, args->fh, &hdr);
2406 encode_open(xdr, args, &hdr);
2407 encode_getfh(xdr, &hdr);
2408 if (args->access)
2409 encode_access(xdr, args->access, &hdr);
2410 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2411 if (args->lg_args) {
2412 encode_layoutget(xdr, args->lg_args, &hdr);
2413 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2414 args->lg_args->layout.pglen,
2415 hdr.replen - pagepad_maxsz);
2416 }
2417 encode_nops(&hdr);
2418 }
2419
2420 /*
2421 * Encode an OPEN_CONFIRM request
2422 */
2423 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2424 struct xdr_stream *xdr,
2425 const void *data)
2426 {
2427 const struct nfs_open_confirmargs *args = data;
2428 struct compound_hdr hdr = {
2429 .nops = 0,
2430 };
2431
2432 encode_compound_hdr(xdr, req, &hdr);
2433 encode_putfh(xdr, args->fh, &hdr);
2434 encode_open_confirm(xdr, args, &hdr);
2435 encode_nops(&hdr);
2436 }
2437
2438 /*
2439 * Encode an OPEN request with no attributes.
2440 */
2441 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2442 struct xdr_stream *xdr,
2443 const void *data)
2444 {
2445 const struct nfs_openargs *args = data;
2446 struct compound_hdr hdr = {
2447 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2448 };
2449
2450 encode_compound_hdr(xdr, req, &hdr);
2451 encode_sequence(xdr, &args->seq_args, &hdr);
2452 encode_putfh(xdr, args->fh, &hdr);
2453 encode_open(xdr, args, &hdr);
2454 if (args->access)
2455 encode_access(xdr, args->access, &hdr);
2456 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2457 if (args->lg_args) {
2458 encode_layoutget(xdr, args->lg_args, &hdr);
2459 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2460 args->lg_args->layout.pglen,
2461 hdr.replen - pagepad_maxsz);
2462 }
2463 encode_nops(&hdr);
2464 }
2465
2466 /*
2467 * Encode an OPEN_DOWNGRADE request
2468 */
2469 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2470 struct xdr_stream *xdr,
2471 const void *data)
2472 {
2473 const struct nfs_closeargs *args = data;
2474 struct compound_hdr hdr = {
2475 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2476 };
2477
2478 encode_compound_hdr(xdr, req, &hdr);
2479 encode_sequence(xdr, &args->seq_args, &hdr);
2480 encode_putfh(xdr, args->fh, &hdr);
2481 if (args->lr_args)
2482 encode_layoutreturn(xdr, args->lr_args, &hdr);
2483 encode_open_downgrade(xdr, args, &hdr);
2484 encode_nops(&hdr);
2485 }
2486
2487 /*
2488 * Encode a LOCK request
2489 */
2490 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2491 const void *data)
2492 {
2493 const struct nfs_lock_args *args = data;
2494 struct compound_hdr hdr = {
2495 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2496 };
2497
2498 encode_compound_hdr(xdr, req, &hdr);
2499 encode_sequence(xdr, &args->seq_args, &hdr);
2500 encode_putfh(xdr, args->fh, &hdr);
2501 encode_lock(xdr, args, &hdr);
2502 encode_nops(&hdr);
2503 }
2504
2505 /*
2506 * Encode a LOCKT request
2507 */
2508 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2509 const void *data)
2510 {
2511 const struct nfs_lockt_args *args = data;
2512 struct compound_hdr hdr = {
2513 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2514 };
2515
2516 encode_compound_hdr(xdr, req, &hdr);
2517 encode_sequence(xdr, &args->seq_args, &hdr);
2518 encode_putfh(xdr, args->fh, &hdr);
2519 encode_lockt(xdr, args, &hdr);
2520 encode_nops(&hdr);
2521 }
2522
2523 /*
2524 * Encode a LOCKU request
2525 */
2526 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2527 const void *data)
2528 {
2529 const struct nfs_locku_args *args = data;
2530 struct compound_hdr hdr = {
2531 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2532 };
2533
2534 encode_compound_hdr(xdr, req, &hdr);
2535 encode_sequence(xdr, &args->seq_args, &hdr);
2536 encode_putfh(xdr, args->fh, &hdr);
2537 encode_locku(xdr, args, &hdr);
2538 encode_nops(&hdr);
2539 }
2540
2541 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2542 struct xdr_stream *xdr,
2543 const void *data)
2544 {
2545 const struct nfs_release_lockowner_args *args = data;
2546 struct compound_hdr hdr = {
2547 .minorversion = 0,
2548 };
2549
2550 encode_compound_hdr(xdr, req, &hdr);
2551 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2552 encode_nops(&hdr);
2553 }
2554
2555 /*
2556 * Encode a READLINK request
2557 */
2558 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2559 const void *data)
2560 {
2561 const struct nfs4_readlink *args = data;
2562 struct compound_hdr hdr = {
2563 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2564 };
2565
2566 encode_compound_hdr(xdr, req, &hdr);
2567 encode_sequence(xdr, &args->seq_args, &hdr);
2568 encode_putfh(xdr, args->fh, &hdr);
2569 encode_readlink(xdr, args, req, &hdr);
2570
2571 rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2572 args->pglen, hdr.replen - pagepad_maxsz);
2573 encode_nops(&hdr);
2574 }
2575
2576 /*
2577 * Encode a READDIR request
2578 */
2579 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2580 const void *data)
2581 {
2582 const struct nfs4_readdir_arg *args = data;
2583 struct compound_hdr hdr = {
2584 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2585 };
2586
2587 encode_compound_hdr(xdr, req, &hdr);
2588 encode_sequence(xdr, &args->seq_args, &hdr);
2589 encode_putfh(xdr, args->fh, &hdr);
2590 encode_readdir(xdr, args, req, &hdr);
2591
2592 rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2593 args->count, hdr.replen - pagepad_maxsz);
2594 encode_nops(&hdr);
2595 }
2596
2597 /*
2598 * Encode a READ request
2599 */
2600 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2601 const void *data)
2602 {
2603 const struct nfs_pgio_args *args = data;
2604 struct compound_hdr hdr = {
2605 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2606 };
2607
2608 encode_compound_hdr(xdr, req, &hdr);
2609 encode_sequence(xdr, &args->seq_args, &hdr);
2610 encode_putfh(xdr, args->fh, &hdr);
2611 encode_read(xdr, args, &hdr);
2612
2613 rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2614 args->count, hdr.replen - pagepad_maxsz);
2615 req->rq_rcv_buf.flags |= XDRBUF_READ;
2616 encode_nops(&hdr);
2617 }
2618
2619 /*
2620 * Encode an SETATTR request
2621 */
2622 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2623 const void *data)
2624 {
2625 const struct nfs_setattrargs *args = data;
2626 struct compound_hdr hdr = {
2627 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2628 };
2629
2630 encode_compound_hdr(xdr, req, &hdr);
2631 encode_sequence(xdr, &args->seq_args, &hdr);
2632 encode_putfh(xdr, args->fh, &hdr);
2633 encode_setattr(xdr, args, args->server, &hdr);
2634 encode_getfattr(xdr, args->bitmask, &hdr);
2635 encode_nops(&hdr);
2636 }
2637
2638 /*
2639 * Encode a GETACL request
2640 */
2641 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2642 const void *data)
2643 {
2644 const struct nfs_getaclargs *args = data;
2645 struct compound_hdr hdr = {
2646 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2647 };
2648 __u32 nfs4_acl_bitmap[2];
2649 uint32_t replen;
2650
2651 nfs4_acltype_to_bitmap(args->acl_type, nfs4_acl_bitmap);
2652
2653 encode_compound_hdr(xdr, req, &hdr);
2654 encode_sequence(xdr, &args->seq_args, &hdr);
2655 encode_putfh(xdr, args->fh, &hdr);
2656 replen = hdr.replen + op_decode_hdr_maxsz;
2657 encode_getattr(xdr, nfs4_acl_bitmap, NULL,
2658 ARRAY_SIZE(nfs4_acl_bitmap), &hdr);
2659
2660 rpc_prepare_reply_pages(req, args->acl_pages, 0,
2661 args->acl_len, replen);
2662 encode_nops(&hdr);
2663 }
2664
2665 /*
2666 * Encode a WRITE request
2667 */
2668 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2669 const void *data)
2670 {
2671 const struct nfs_pgio_args *args = data;
2672 struct compound_hdr hdr = {
2673 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2674 };
2675
2676 encode_compound_hdr(xdr, req, &hdr);
2677 encode_sequence(xdr, &args->seq_args, &hdr);
2678 encode_putfh(xdr, args->fh, &hdr);
2679 encode_write(xdr, args, &hdr);
2680 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2681 if (args->bitmask)
2682 encode_getfattr(xdr, args->bitmask, &hdr);
2683 encode_nops(&hdr);
2684 }
2685
2686 /*
2687 * a COMMIT request
2688 */
2689 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2690 const void *data)
2691 {
2692 const struct nfs_commitargs *args = data;
2693 struct compound_hdr hdr = {
2694 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2695 };
2696
2697 encode_compound_hdr(xdr, req, &hdr);
2698 encode_sequence(xdr, &args->seq_args, &hdr);
2699 encode_putfh(xdr, args->fh, &hdr);
2700 encode_commit(xdr, args, &hdr);
2701 encode_nops(&hdr);
2702 }
2703
2704 /*
2705 * FSINFO request
2706 */
2707 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2708 const void *data)
2709 {
2710 const struct nfs4_fsinfo_arg *args = data;
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->fh, &hdr);
2718 encode_fsinfo(xdr, args->bitmask, &hdr);
2719 encode_nops(&hdr);
2720 }
2721
2722 /*
2723 * a PATHCONF request
2724 */
2725 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2726 const void *data)
2727 {
2728 const struct nfs4_pathconf_arg *args = data;
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_getattr(xdr, nfs4_pathconf_bitmap, args->bitmask,
2737 ARRAY_SIZE(nfs4_pathconf_bitmap), &hdr);
2738 encode_nops(&hdr);
2739 }
2740
2741 /*
2742 * a STATFS request
2743 */
2744 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2745 const void *data)
2746 {
2747 const struct nfs4_statfs_arg *args = data;
2748 struct compound_hdr hdr = {
2749 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2750 };
2751
2752 encode_compound_hdr(xdr, req, &hdr);
2753 encode_sequence(xdr, &args->seq_args, &hdr);
2754 encode_putfh(xdr, args->fh, &hdr);
2755 encode_getattr(xdr, nfs4_statfs_bitmap, args->bitmask,
2756 ARRAY_SIZE(nfs4_statfs_bitmap), &hdr);
2757 encode_nops(&hdr);
2758 }
2759
2760 /*
2761 * GETATTR_BITMAP request
2762 */
2763 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2764 struct xdr_stream *xdr,
2765 const void *data)
2766 {
2767 const struct nfs4_server_caps_arg *args = data;
2768 const u32 *bitmask = args->bitmask;
2769 struct compound_hdr hdr = {
2770 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2771 };
2772
2773 encode_compound_hdr(xdr, req, &hdr);
2774 encode_sequence(xdr, &args->seq_args, &hdr);
2775 encode_putfh(xdr, args->fhandle, &hdr);
2776 encode_getattr(xdr, bitmask, NULL, 3, &hdr);
2777 encode_nops(&hdr);
2778 }
2779
2780 /*
2781 * a RENEW request
2782 */
2783 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2784 const void *data)
2785
2786 {
2787 const struct nfs_client *clp = data;
2788 struct compound_hdr hdr = {
2789 .nops = 0,
2790 };
2791
2792 encode_compound_hdr(xdr, req, &hdr);
2793 encode_renew(xdr, clp->cl_clientid, &hdr);
2794 encode_nops(&hdr);
2795 }
2796
2797 /*
2798 * a SETCLIENTID request
2799 */
2800 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2801 struct xdr_stream *xdr,
2802 const void *data)
2803 {
2804 const struct nfs4_setclientid *sc = data;
2805 struct compound_hdr hdr = {
2806 .nops = 0,
2807 };
2808
2809 encode_compound_hdr(xdr, req, &hdr);
2810 encode_setclientid(xdr, sc, &hdr);
2811 encode_nops(&hdr);
2812 }
2813
2814 /*
2815 * a SETCLIENTID_CONFIRM request
2816 */
2817 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2818 struct xdr_stream *xdr,
2819 const void *data)
2820 {
2821 const struct nfs4_setclientid_res *arg = data;
2822 struct compound_hdr hdr = {
2823 .nops = 0,
2824 };
2825
2826 encode_compound_hdr(xdr, req, &hdr);
2827 encode_setclientid_confirm(xdr, arg, &hdr);
2828 encode_nops(&hdr);
2829 }
2830
2831 /*
2832 * DELEGRETURN request
2833 */
2834 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2835 struct xdr_stream *xdr,
2836 const void *data)
2837 {
2838 const struct nfs4_delegreturnargs *args = data;
2839 struct compound_hdr hdr = {
2840 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2841 };
2842
2843 encode_compound_hdr(xdr, req, &hdr);
2844 encode_sequence(xdr, &args->seq_args, &hdr);
2845 encode_putfh(xdr, args->fhandle, &hdr);
2846 if (args->lr_args)
2847 encode_layoutreturn(xdr, args->lr_args, &hdr);
2848 if (args->sattr_args)
2849 encode_delegattr(xdr, args->stateid, args->sattr_args, &hdr);
2850 if (args->bitmask)
2851 encode_getfattr(xdr, args->bitmask, &hdr);
2852 encode_delegreturn(xdr, args->stateid, &hdr);
2853 encode_nops(&hdr);
2854 }
2855
2856 /*
2857 * Encode FS_LOCATIONS request
2858 */
2859 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2860 struct xdr_stream *xdr,
2861 const void *data)
2862 {
2863 const struct nfs4_fs_locations_arg *args = data;
2864 struct compound_hdr hdr = {
2865 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2866 };
2867 uint32_t replen;
2868
2869 encode_compound_hdr(xdr, req, &hdr);
2870 encode_sequence(xdr, &args->seq_args, &hdr);
2871 if (args->migration) {
2872 encode_putfh(xdr, args->fh, &hdr);
2873 replen = hdr.replen;
2874 encode_fs_locations(xdr, args->bitmask, &hdr);
2875 if (args->renew)
2876 encode_renew(xdr, args->clientid, &hdr);
2877 } else {
2878 encode_putfh(xdr, args->dir_fh, &hdr);
2879 encode_lookup(xdr, args->name, &hdr);
2880 replen = hdr.replen;
2881 encode_fs_locations(xdr, args->bitmask, &hdr);
2882 }
2883
2884 rpc_prepare_reply_pages(req, (struct page **)&args->page, 0,
2885 PAGE_SIZE, replen);
2886 encode_nops(&hdr);
2887 }
2888
2889 /*
2890 * Encode SECINFO request
2891 */
2892 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2893 struct xdr_stream *xdr,
2894 const void *data)
2895 {
2896 const struct nfs4_secinfo_arg *args = data;
2897 struct compound_hdr hdr = {
2898 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2899 };
2900
2901 encode_compound_hdr(xdr, req, &hdr);
2902 encode_sequence(xdr, &args->seq_args, &hdr);
2903 encode_putfh(xdr, args->dir_fh, &hdr);
2904 encode_secinfo(xdr, args->name, &hdr);
2905 encode_nops(&hdr);
2906 }
2907
2908 /*
2909 * Encode FSID_PRESENT request
2910 */
2911 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2912 struct xdr_stream *xdr,
2913 const void *data)
2914 {
2915 const struct nfs4_fsid_present_arg *args = data;
2916 struct compound_hdr hdr = {
2917 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2918 };
2919
2920 encode_compound_hdr(xdr, req, &hdr);
2921 encode_sequence(xdr, &args->seq_args, &hdr);
2922 encode_putfh(xdr, args->fh, &hdr);
2923 encode_getfh(xdr, &hdr);
2924 if (args->renew)
2925 encode_renew(xdr, args->clientid, &hdr);
2926 encode_nops(&hdr);
2927 }
2928
2929 #if defined(CONFIG_NFS_V4_1)
2930 /*
2931 * BIND_CONN_TO_SESSION request
2932 */
2933 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2934 struct xdr_stream *xdr,
2935 const void *data)
2936 {
2937 const struct nfs41_bind_conn_to_session_args *args = data;
2938 struct compound_hdr hdr = {
2939 .minorversion = args->client->cl_mvops->minor_version,
2940 };
2941
2942 encode_compound_hdr(xdr, req, &hdr);
2943 encode_bind_conn_to_session(xdr, args, &hdr);
2944 encode_nops(&hdr);
2945 }
2946
2947 /*
2948 * EXCHANGE_ID request
2949 */
2950 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2951 struct xdr_stream *xdr,
2952 const void *data)
2953 {
2954 const struct nfs41_exchange_id_args *args = data;
2955 struct compound_hdr hdr = {
2956 .minorversion = args->client->cl_mvops->minor_version,
2957 };
2958
2959 encode_compound_hdr(xdr, req, &hdr);
2960 encode_exchange_id(xdr, args, &hdr);
2961 encode_nops(&hdr);
2962 }
2963
2964 /*
2965 * a CREATE_SESSION request
2966 */
2967 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2968 struct xdr_stream *xdr,
2969 const void *data)
2970 {
2971 const struct nfs41_create_session_args *args = data;
2972 struct compound_hdr hdr = {
2973 .minorversion = args->client->cl_mvops->minor_version,
2974 };
2975
2976 encode_compound_hdr(xdr, req, &hdr);
2977 encode_create_session(xdr, args, &hdr);
2978 encode_nops(&hdr);
2979 }
2980
2981 /*
2982 * a DESTROY_SESSION request
2983 */
2984 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2985 struct xdr_stream *xdr,
2986 const void *data)
2987 {
2988 const struct nfs4_session *session = data;
2989 struct compound_hdr hdr = {
2990 .minorversion = session->clp->cl_mvops->minor_version,
2991 };
2992
2993 encode_compound_hdr(xdr, req, &hdr);
2994 encode_destroy_session(xdr, session, &hdr);
2995 encode_nops(&hdr);
2996 }
2997
2998 /*
2999 * a DESTROY_CLIENTID request
3000 */
3001 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
3002 struct xdr_stream *xdr,
3003 const void *data)
3004 {
3005 const struct nfs_client *clp = data;
3006 struct compound_hdr hdr = {
3007 .minorversion = clp->cl_mvops->minor_version,
3008 };
3009
3010 encode_compound_hdr(xdr, req, &hdr);
3011 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
3012 encode_nops(&hdr);
3013 }
3014
3015 /*
3016 * a SEQUENCE request
3017 */
3018 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
3019 const void *data)
3020 {
3021 const struct nfs4_sequence_args *args = data;
3022 struct compound_hdr hdr = {
3023 .minorversion = nfs4_xdr_minorversion(args),
3024 };
3025
3026 encode_compound_hdr(xdr, req, &hdr);
3027 encode_sequence(xdr, args, &hdr);
3028 encode_nops(&hdr);
3029 }
3030
3031 #endif
3032
3033 /*
3034 * a GET_LEASE_TIME request
3035 */
3036 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
3037 struct xdr_stream *xdr,
3038 const void *data)
3039 {
3040 const struct nfs4_get_lease_time_args *args = data;
3041 struct compound_hdr hdr = {
3042 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
3043 };
3044 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
3045
3046 encode_compound_hdr(xdr, req, &hdr);
3047 encode_sequence(xdr, &args->la_seq_args, &hdr);
3048 encode_putrootfh(xdr, &hdr);
3049 encode_fsinfo(xdr, lease_bitmap, &hdr);
3050 encode_nops(&hdr);
3051 }
3052
3053 #ifdef CONFIG_NFS_V4_1
3054
3055 /*
3056 * a RECLAIM_COMPLETE request
3057 */
3058 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
3059 struct xdr_stream *xdr,
3060 const void *data)
3061 {
3062 const struct nfs41_reclaim_complete_args *args = data;
3063 struct compound_hdr hdr = {
3064 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
3065 };
3066
3067 encode_compound_hdr(xdr, req, &hdr);
3068 encode_sequence(xdr, &args->seq_args, &hdr);
3069 encode_reclaim_complete(xdr, args, &hdr);
3070 encode_nops(&hdr);
3071 }
3072
3073 /*
3074 * Encode GETDEVICEINFO request
3075 */
3076 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
3077 struct xdr_stream *xdr,
3078 const void *data)
3079 {
3080 const struct nfs4_getdeviceinfo_args *args = data;
3081 struct compound_hdr hdr = {
3082 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3083 };
3084 uint32_t replen;
3085
3086 encode_compound_hdr(xdr, req, &hdr);
3087 encode_sequence(xdr, &args->seq_args, &hdr);
3088
3089 replen = hdr.replen + op_decode_hdr_maxsz + 2;
3090
3091 encode_getdeviceinfo(xdr, args, &hdr);
3092
3093 /* set up reply kvec. device_addr4 opaque data is read into the
3094 * pages */
3095 rpc_prepare_reply_pages(req, args->pdev->pages, args->pdev->pgbase,
3096 args->pdev->pglen, replen);
3097 encode_nops(&hdr);
3098 }
3099
3100 /*
3101 * Encode LAYOUTGET request
3102 */
3103 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
3104 struct xdr_stream *xdr,
3105 const void *data)
3106 {
3107 const struct nfs4_layoutget_args *args = data;
3108 struct compound_hdr hdr = {
3109 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3110 };
3111
3112 encode_compound_hdr(xdr, req, &hdr);
3113 encode_sequence(xdr, &args->seq_args, &hdr);
3114 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3115 encode_layoutget(xdr, args, &hdr);
3116
3117 rpc_prepare_reply_pages(req, args->layout.pages, 0,
3118 args->layout.pglen, hdr.replen - pagepad_maxsz);
3119 encode_nops(&hdr);
3120 }
3121
3122 /*
3123 * Encode LAYOUTCOMMIT request
3124 */
3125 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3126 struct xdr_stream *xdr,
3127 const void *priv)
3128 {
3129 const struct nfs4_layoutcommit_args *args = priv;
3130 struct nfs4_layoutcommit_data *data =
3131 container_of(args, struct nfs4_layoutcommit_data, args);
3132 struct compound_hdr hdr = {
3133 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3134 };
3135
3136 encode_compound_hdr(xdr, req, &hdr);
3137 encode_sequence(xdr, &args->seq_args, &hdr);
3138 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3139 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3140 encode_getfattr(xdr, args->bitmask, &hdr);
3141 encode_nops(&hdr);
3142 }
3143
3144 /*
3145 * Encode LAYOUTRETURN request
3146 */
3147 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3148 struct xdr_stream *xdr,
3149 const void *data)
3150 {
3151 const struct nfs4_layoutreturn_args *args = data;
3152 struct compound_hdr hdr = {
3153 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3154 };
3155
3156 encode_compound_hdr(xdr, req, &hdr);
3157 encode_sequence(xdr, &args->seq_args, &hdr);
3158 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3159 encode_layoutreturn(xdr, args, &hdr);
3160 encode_nops(&hdr);
3161 }
3162
3163 /*
3164 * Encode SECINFO_NO_NAME request
3165 */
3166 static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3167 struct xdr_stream *xdr,
3168 const void *data)
3169 {
3170 const struct nfs41_secinfo_no_name_args *args = data;
3171 struct compound_hdr hdr = {
3172 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3173 };
3174
3175 encode_compound_hdr(xdr, req, &hdr);
3176 encode_sequence(xdr, &args->seq_args, &hdr);
3177 encode_putrootfh(xdr, &hdr);
3178 encode_secinfo_no_name(xdr, args, &hdr);
3179 encode_nops(&hdr);
3180 }
3181
3182 /*
3183 * Encode TEST_STATEID request
3184 */
3185 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3186 struct xdr_stream *xdr,
3187 const void *data)
3188 {
3189 const struct nfs41_test_stateid_args *args = data;
3190 struct compound_hdr hdr = {
3191 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3192 };
3193
3194 encode_compound_hdr(xdr, req, &hdr);
3195 encode_sequence(xdr, &args->seq_args, &hdr);
3196 encode_test_stateid(xdr, args, &hdr);
3197 encode_nops(&hdr);
3198 }
3199
3200 /*
3201 * Encode FREE_STATEID request
3202 */
3203 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3204 struct xdr_stream *xdr,
3205 const void *data)
3206 {
3207 const struct nfs41_free_stateid_args *args = data;
3208 struct compound_hdr hdr = {
3209 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3210 };
3211
3212 encode_compound_hdr(xdr, req, &hdr);
3213 encode_sequence(xdr, &args->seq_args, &hdr);
3214 encode_free_stateid(xdr, args, &hdr);
3215 encode_nops(&hdr);
3216 }
3217 #endif /* CONFIG_NFS_V4_1 */
3218
3219 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3220 {
3221 ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3222 NFS4_OPAQUE_LIMIT);
3223 if (unlikely(ret < 0))
3224 return -EIO;
3225 *len = ret;
3226 return 0;
3227 }
3228
3229 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3230 {
3231 ssize_t ret;
3232 void *ptr;
3233 u32 tmp;
3234
3235 if (xdr_stream_decode_u32(xdr, &tmp) < 0)
3236 return -EIO;
3237 hdr->status = tmp;
3238
3239 ret = xdr_stream_decode_opaque_inline(xdr, &ptr, NFS4_OPAQUE_LIMIT);
3240 if (ret < 0)
3241 return -EIO;
3242 hdr->taglen = ret;
3243 hdr->tag = ptr;
3244
3245 if (xdr_stream_decode_u32(xdr, &tmp) < 0)
3246 return -EIO;
3247 hdr->nops = tmp;
3248 if (unlikely(hdr->nops < 1))
3249 return nfs4_stat_to_errno(hdr->status);
3250 return 0;
3251 }
3252
3253 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3254 int *nfs_retval)
3255 {
3256 __be32 *p;
3257 uint32_t opnum;
3258 int32_t nfserr;
3259
3260 p = xdr_inline_decode(xdr, 8);
3261 if (unlikely(!p))
3262 goto out_overflow;
3263 opnum = be32_to_cpup(p++);
3264 if (unlikely(opnum != expected))
3265 goto out_bad_operation;
3266 if (unlikely(*p != cpu_to_be32(NFS_OK)))
3267 goto out_status;
3268 *nfs_retval = 0;
3269 return true;
3270 out_status:
3271 nfserr = be32_to_cpup(p);
3272 trace_nfs4_xdr_status(xdr, opnum, nfserr);
3273 *nfs_retval = nfs4_stat_to_errno(nfserr);
3274 return true;
3275 out_bad_operation:
3276 trace_nfs4_xdr_bad_operation(xdr, opnum, expected);
3277 *nfs_retval = -EREMOTEIO;
3278 return false;
3279 out_overflow:
3280 *nfs_retval = -EIO;
3281 return false;
3282 }
3283
3284 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3285 {
3286 int retval;
3287
3288 __decode_op_hdr(xdr, expected, &retval);
3289 return retval;
3290 }
3291
3292 /* Dummy routine */
3293 static int decode_ace(struct xdr_stream *xdr, void *ace)
3294 {
3295 __be32 *p;
3296 unsigned int strlen;
3297 char *str;
3298
3299 p = xdr_inline_decode(xdr, 12);
3300 if (unlikely(!p))
3301 return -EIO;
3302 return decode_opaque_inline(xdr, &strlen, &str);
3303 }
3304
3305 static ssize_t
3306 decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
3307 {
3308 ssize_t ret;
3309
3310 ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
3311 if (likely(ret >= 0))
3312 return ret;
3313 if (ret != -EMSGSIZE)
3314 return -EIO;
3315 return sz;
3316 }
3317
3318 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3319 {
3320 ssize_t ret;
3321 ret = decode_bitmap4(xdr, bitmap, 3);
3322 return ret < 0 ? ret : 0;
3323 }
3324
3325 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3326 {
3327 __be32 *p;
3328
3329 p = xdr_inline_decode(xdr, 4);
3330 if (unlikely(!p))
3331 return -EIO;
3332 *attrlen = be32_to_cpup(p);
3333 *savep = xdr_stream_pos(xdr);
3334 return 0;
3335 }
3336
3337 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3338 {
3339 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3340 int ret;
3341 ret = decode_attr_bitmap(xdr, bitmask);
3342 if (unlikely(ret < 0))
3343 return ret;
3344 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3345 } else
3346 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3347 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3348 bitmask[0], bitmask[1], bitmask[2]);
3349 return 0;
3350 }
3351
3352 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3353 {
3354 __be32 *p;
3355 int ret = 0;
3356
3357 *type = 0;
3358 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3359 return -EIO;
3360 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3361 p = xdr_inline_decode(xdr, 4);
3362 if (unlikely(!p))
3363 return -EIO;
3364 *type = be32_to_cpup(p);
3365 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3366 dprintk("%s: bad type %d\n", __func__, *type);
3367 return -EIO;
3368 }
3369 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3370 ret = NFS_ATTR_FATTR_TYPE;
3371 }
3372 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3373 return ret;
3374 }
3375
3376 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3377 uint32_t *bitmap, uint32_t *type)
3378 {
3379 __be32 *p;
3380
3381 *type = 0;
3382 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3383 return -EIO;
3384 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3385 p = xdr_inline_decode(xdr, 4);
3386 if (unlikely(!p))
3387 return -EIO;
3388 *type = be32_to_cpup(p);
3389 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3390 }
3391 dprintk("%s: expire type=0x%x\n", __func__, *type);
3392 return 0;
3393 }
3394
3395 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3396 {
3397 __be32 *p;
3398 int ret = 0;
3399
3400 *change = 0;
3401 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3402 return -EIO;
3403 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3404 p = xdr_inline_decode(xdr, 8);
3405 if (unlikely(!p))
3406 return -EIO;
3407 xdr_decode_hyper(p, change);
3408 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3409 ret = NFS_ATTR_FATTR_CHANGE;
3410 }
3411 dprintk("%s: change attribute=%Lu\n", __func__,
3412 (unsigned long long)*change);
3413 return ret;
3414 }
3415
3416 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3417 {
3418 __be32 *p;
3419 int ret = 0;
3420
3421 *size = 0;
3422 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3423 return -EIO;
3424 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3425 p = xdr_inline_decode(xdr, 8);
3426 if (unlikely(!p))
3427 return -EIO;
3428 xdr_decode_hyper(p, size);
3429 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3430 ret = NFS_ATTR_FATTR_SIZE;
3431 }
3432 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3433 return ret;
3434 }
3435
3436 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3437 {
3438 __be32 *p;
3439
3440 *res = 0;
3441 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3442 return -EIO;
3443 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3444 p = xdr_inline_decode(xdr, 4);
3445 if (unlikely(!p))
3446 return -EIO;
3447 *res = be32_to_cpup(p);
3448 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3449 }
3450 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3451 return 0;
3452 }
3453
3454 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3455 {
3456 __be32 *p;
3457
3458 *res = 0;
3459 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3460 return -EIO;
3461 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3462 p = xdr_inline_decode(xdr, 4);
3463 if (unlikely(!p))
3464 return -EIO;
3465 *res = be32_to_cpup(p);
3466 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3467 }
3468 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3469 return 0;
3470 }
3471
3472 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3473 {
3474 __be32 *p;
3475 int ret = 0;
3476
3477 fsid->major = 0;
3478 fsid->minor = 0;
3479 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3480 return -EIO;
3481 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3482 p = xdr_inline_decode(xdr, 16);
3483 if (unlikely(!p))
3484 return -EIO;
3485 p = xdr_decode_hyper(p, &fsid->major);
3486 xdr_decode_hyper(p, &fsid->minor);
3487 bitmap[0] &= ~FATTR4_WORD0_FSID;
3488 ret = NFS_ATTR_FATTR_FSID;
3489 }
3490 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3491 (unsigned long long)fsid->major,
3492 (unsigned long long)fsid->minor);
3493 return ret;
3494 }
3495
3496 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3497 {
3498 __be32 *p;
3499
3500 *res = 60;
3501 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3502 return -EIO;
3503 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3504 p = xdr_inline_decode(xdr, 4);
3505 if (unlikely(!p))
3506 return -EIO;
3507 *res = be32_to_cpup(p);
3508 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3509 }
3510 dprintk("%s: lease time=%u\n", __func__, (unsigned int)*res);
3511 return 0;
3512 }
3513
3514 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3515 {
3516 __be32 *p;
3517
3518 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3519 return -EIO;
3520 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3521 p = xdr_inline_decode(xdr, 4);
3522 if (unlikely(!p))
3523 return -EIO;
3524 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3525 *res = -be32_to_cpup(p);
3526 }
3527 return 0;
3528 }
3529
3530 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3531 uint32_t *bitmap, uint32_t *bitmask)
3532 {
3533 if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3534 int ret;
3535 ret = decode_attr_bitmap(xdr, bitmask);
3536 if (unlikely(ret < 0))
3537 return ret;
3538 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3539 } else
3540 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3541 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3542 bitmask[0], bitmask[1], bitmask[2]);
3543 return 0;
3544 }
3545
3546 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3547 {
3548 __be32 *p;
3549 u32 len;
3550
3551 if (fh != NULL)
3552 memset(fh, 0, sizeof(*fh));
3553
3554 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3555 return -EIO;
3556 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3557 p = xdr_inline_decode(xdr, 4);
3558 if (unlikely(!p))
3559 return -EIO;
3560 len = be32_to_cpup(p);
3561 if (len > NFS4_FHSIZE || len == 0) {
3562 trace_nfs4_xdr_bad_filehandle(xdr, OP_READDIR,
3563 NFS4ERR_BADHANDLE);
3564 return -EREMOTEIO;
3565 }
3566 p = xdr_inline_decode(xdr, len);
3567 if (unlikely(!p))
3568 return -EIO;
3569 if (fh != NULL) {
3570 memcpy(fh->data, p, len);
3571 fh->size = len;
3572 }
3573 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3574 }
3575 return 0;
3576 }
3577
3578 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3579 {
3580 __be32 *p;
3581
3582 *res = 0;
3583 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3584 return -EIO;
3585 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3586 p = xdr_inline_decode(xdr, 4);
3587 if (unlikely(!p))
3588 return -EIO;
3589 *res = be32_to_cpup(p);
3590 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3591 }
3592 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3593 return 0;
3594 }
3595
3596 static int decode_attr_case_insensitive(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3597 {
3598 __be32 *p;
3599
3600 *res = 0;
3601 if (unlikely(bitmap[0] & (FATTR4_WORD0_CASE_INSENSITIVE - 1U)))
3602 return -EIO;
3603 if (likely(bitmap[0] & FATTR4_WORD0_CASE_INSENSITIVE)) {
3604 p = xdr_inline_decode(xdr, 4);
3605 if (unlikely(!p))
3606 return -EIO;
3607 *res = be32_to_cpup(p);
3608 bitmap[0] &= ~FATTR4_WORD0_CASE_INSENSITIVE;
3609 }
3610 dprintk("%s: case_insensitive=%s\n", __func__, *res == 0 ? "false" : "true");
3611 return 0;
3612 }
3613
3614 static int decode_attr_case_preserving(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3615 {
3616 __be32 *p;
3617
3618 *res = 0;
3619 if (unlikely(bitmap[0] & (FATTR4_WORD0_CASE_PRESERVING - 1U)))
3620 return -EIO;
3621 if (likely(bitmap[0] & FATTR4_WORD0_CASE_PRESERVING)) {
3622 p = xdr_inline_decode(xdr, 4);
3623 if (unlikely(!p))
3624 return -EIO;
3625 *res = be32_to_cpup(p);
3626 bitmap[0] &= ~FATTR4_WORD0_CASE_PRESERVING;
3627 }
3628 dprintk("%s: case_preserving=%s\n", __func__, *res == 0 ? "false" : "true");
3629 return 0;
3630 }
3631
3632 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3633 {
3634 __be32 *p;
3635 int ret = 0;
3636
3637 *fileid = 0;
3638 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3639 return -EIO;
3640 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3641 p = xdr_inline_decode(xdr, 8);
3642 if (unlikely(!p))
3643 return -EIO;
3644 xdr_decode_hyper(p, fileid);
3645 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3646 ret = NFS_ATTR_FATTR_FILEID;
3647 }
3648 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3649 return ret;
3650 }
3651
3652 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3653 {
3654 __be32 *p;
3655 int ret = 0;
3656
3657 *fileid = 0;
3658 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3659 return -EIO;
3660 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3661 p = xdr_inline_decode(xdr, 8);
3662 if (unlikely(!p))
3663 return -EIO;
3664 xdr_decode_hyper(p, fileid);
3665 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3666 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3667 }
3668 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3669 return ret;
3670 }
3671
3672 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3673 {
3674 __be32 *p;
3675 int status = 0;
3676
3677 *res = 0;
3678 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3679 return -EIO;
3680 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3681 p = xdr_inline_decode(xdr, 8);
3682 if (unlikely(!p))
3683 return -EIO;
3684 xdr_decode_hyper(p, res);
3685 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3686 }
3687 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3688 return status;
3689 }
3690
3691 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3692 {
3693 __be32 *p;
3694 int status = 0;
3695
3696 *res = 0;
3697 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3698 return -EIO;
3699 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3700 p = xdr_inline_decode(xdr, 8);
3701 if (unlikely(!p))
3702 return -EIO;
3703 xdr_decode_hyper(p, res);
3704 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3705 }
3706 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3707 return status;
3708 }
3709
3710 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3711 {
3712 __be32 *p;
3713 int status = 0;
3714
3715 *res = 0;
3716 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3717 return -EIO;
3718 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3719 p = xdr_inline_decode(xdr, 8);
3720 if (unlikely(!p))
3721 return -EIO;
3722 xdr_decode_hyper(p, res);
3723 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3724 }
3725 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3726 return status;
3727 }
3728
3729 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3730 {
3731 u32 n;
3732 __be32 *p;
3733 int status = 0;
3734
3735 p = xdr_inline_decode(xdr, 4);
3736 if (unlikely(!p))
3737 return -EIO;
3738 n = be32_to_cpup(p);
3739 if (n == 0)
3740 goto root_path;
3741 dprintk("pathname4: ");
3742 if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3743 dprintk("cannot parse %d components in path\n", n);
3744 goto out_eio;
3745 }
3746 for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3747 struct nfs4_string *component = &path->components[path->ncomponents];
3748 status = decode_opaque_inline(xdr, &component->len, &component->data);
3749 if (unlikely(status != 0))
3750 goto out_eio;
3751 ifdebug (XDR)
3752 pr_cont("%s%.*s ",
3753 (path->ncomponents != n ? "/ " : ""),
3754 component->len, component->data);
3755 }
3756 out:
3757 return status;
3758 root_path:
3759 /* a root pathname is sent as a zero component4 */
3760 path->ncomponents = 1;
3761 path->components[0].len=0;
3762 path->components[0].data=NULL;
3763 dprintk("pathname4: /\n");
3764 goto out;
3765 out_eio:
3766 dprintk(" status %d", status);
3767 status = -EIO;
3768 goto out;
3769 }
3770
3771 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3772 {
3773 int n;
3774 __be32 *p;
3775 int status = -EIO;
3776
3777 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3778 goto out;
3779 status = 0;
3780 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3781 goto out;
3782 bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3783 status = -EIO;
3784 /* Ignore borken servers that return unrequested attrs */
3785 if (unlikely(res == NULL))
3786 goto out;
3787 dprintk("%s: fsroot:\n", __func__);
3788 status = decode_pathname(xdr, &res->fs_path);
3789 if (unlikely(status != 0))
3790 goto out;
3791 p = xdr_inline_decode(xdr, 4);
3792 if (unlikely(!p))
3793 goto out_eio;
3794 n = be32_to_cpup(p);
3795 for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3796 u32 m;
3797 struct nfs4_fs_location *loc;
3798
3799 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3800 break;
3801 loc = &res->locations[res->nlocations];
3802 p = xdr_inline_decode(xdr, 4);
3803 if (unlikely(!p))
3804 goto out_eio;
3805 m = be32_to_cpup(p);
3806
3807 dprintk("%s: servers:\n", __func__);
3808 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3809 struct nfs4_string *server;
3810
3811 if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3812 unsigned int i;
3813 dprintk("%s: using first %u of %u servers "
3814 "returned for location %u\n",
3815 __func__,
3816 NFS4_FS_LOCATION_MAXSERVERS,
3817 m, res->nlocations);
3818 for (i = loc->nservers; i < m; i++) {
3819 unsigned int len;
3820 char *data;
3821 status = decode_opaque_inline(xdr, &len, &data);
3822 if (unlikely(status != 0))
3823 goto out_eio;
3824 }
3825 break;
3826 }
3827 server = &loc->servers[loc->nservers];
3828 status = decode_opaque_inline(xdr, &server->len, &server->data);
3829 if (unlikely(status != 0))
3830 goto out_eio;
3831 dprintk("%s ", server->data);
3832 }
3833 status = decode_pathname(xdr, &loc->rootpath);
3834 if (unlikely(status != 0))
3835 goto out_eio;
3836 }
3837 if (res->nlocations != 0)
3838 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3839 out:
3840 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3841 return status;
3842 out_eio:
3843 status = -EIO;
3844 goto out;
3845 }
3846
3847 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3848 {
3849 __be32 *p;
3850 int status = 0;
3851
3852 *res = 0;
3853 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3854 return -EIO;
3855 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3856 p = xdr_inline_decode(xdr, 8);
3857 if (unlikely(!p))
3858 return -EIO;
3859 xdr_decode_hyper(p, res);
3860 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3861 }
3862 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3863 return status;
3864 }
3865
3866 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3867 {
3868 __be32 *p;
3869 int status = 0;
3870
3871 *maxlink = 1;
3872 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3873 return -EIO;
3874 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3875 p = xdr_inline_decode(xdr, 4);
3876 if (unlikely(!p))
3877 return -EIO;
3878 *maxlink = be32_to_cpup(p);
3879 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3880 }
3881 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3882 return status;
3883 }
3884
3885 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3886 {
3887 __be32 *p;
3888 int status = 0;
3889
3890 *maxname = 1024;
3891 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3892 return -EIO;
3893 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3894 p = xdr_inline_decode(xdr, 4);
3895 if (unlikely(!p))
3896 return -EIO;
3897 *maxname = be32_to_cpup(p);
3898 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3899 }
3900 dprintk("%s: maxname=%u\n", __func__, *maxname);
3901 return status;
3902 }
3903
3904 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3905 {
3906 __be32 *p;
3907 int status = 0;
3908
3909 *res = 1024;
3910 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3911 return -EIO;
3912 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3913 uint64_t maxread;
3914 p = xdr_inline_decode(xdr, 8);
3915 if (unlikely(!p))
3916 return -EIO;
3917 xdr_decode_hyper(p, &maxread);
3918 if (maxread > 0x7FFFFFFF)
3919 maxread = 0x7FFFFFFF;
3920 *res = (uint32_t)maxread;
3921 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3922 }
3923 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3924 return status;
3925 }
3926
3927 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3928 {
3929 __be32 *p;
3930 int status = 0;
3931
3932 *res = 1024;
3933 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3934 return -EIO;
3935 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3936 uint64_t maxwrite;
3937 p = xdr_inline_decode(xdr, 8);
3938 if (unlikely(!p))
3939 return -EIO;
3940 xdr_decode_hyper(p, &maxwrite);
3941 if (maxwrite > 0x7FFFFFFF)
3942 maxwrite = 0x7FFFFFFF;
3943 *res = (uint32_t)maxwrite;
3944 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3945 }
3946 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3947 return status;
3948 }
3949
3950 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3951 {
3952 uint32_t tmp;
3953 __be32 *p;
3954 int ret = 0;
3955
3956 *mode = 0;
3957 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3958 return -EIO;
3959 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3960 p = xdr_inline_decode(xdr, 4);
3961 if (unlikely(!p))
3962 return -EIO;
3963 tmp = be32_to_cpup(p);
3964 *mode = tmp & ~S_IFMT;
3965 bitmap[1] &= ~FATTR4_WORD1_MODE;
3966 ret = NFS_ATTR_FATTR_MODE;
3967 }
3968 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3969 return ret;
3970 }
3971
3972 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3973 {
3974 __be32 *p;
3975 int ret = 0;
3976
3977 *nlink = 1;
3978 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3979 return -EIO;
3980 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3981 p = xdr_inline_decode(xdr, 4);
3982 if (unlikely(!p))
3983 return -EIO;
3984 *nlink = be32_to_cpup(p);
3985 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3986 ret = NFS_ATTR_FATTR_NLINK;
3987 }
3988 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3989 return ret;
3990 }
3991
3992 static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3993 struct nfs4_string *name, gfp_t gfp_flags)
3994 {
3995 ssize_t ret;
3996
3997 ret = xdr_stream_decode_string_dup(xdr, &name->data,
3998 XDR_MAX_NETOBJ, gfp_flags);
3999 name->len = 0;
4000 if (ret > 0)
4001 name->len = ret;
4002 return ret;
4003 }
4004
4005 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
4006 const struct nfs_server *server, kuid_t *uid,
4007 struct nfs4_string *owner_name)
4008 {
4009 ssize_t len;
4010 char *p;
4011
4012 *uid = make_kuid(&init_user_ns, -2);
4013 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
4014 return -EIO;
4015 if (!(bitmap[1] & FATTR4_WORD1_OWNER))
4016 return 0;
4017 bitmap[1] &= ~FATTR4_WORD1_OWNER;
4018
4019 if (owner_name != NULL) {
4020 len = decode_nfs4_string(xdr, owner_name, GFP_NOIO);
4021 if (len <= 0)
4022 goto out;
4023 dprintk("%s: name=%s\n", __func__, owner_name->data);
4024 return NFS_ATTR_FATTR_OWNER_NAME;
4025 } else {
4026 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
4027 XDR_MAX_NETOBJ);
4028 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
4029 goto out;
4030 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
4031 return NFS_ATTR_FATTR_OWNER;
4032 }
4033 out:
4034 if (len == -EBADMSG)
4035 return -EIO;
4036 return 0;
4037 }
4038
4039 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
4040 const struct nfs_server *server, kgid_t *gid,
4041 struct nfs4_string *group_name)
4042 {
4043 ssize_t len;
4044 char *p;
4045
4046 *gid = make_kgid(&init_user_ns, -2);
4047 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
4048 return -EIO;
4049 if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
4050 return 0;
4051 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
4052
4053 if (group_name != NULL) {
4054 len = decode_nfs4_string(xdr, group_name, GFP_NOIO);
4055 if (len <= 0)
4056 goto out;
4057 dprintk("%s: name=%s\n", __func__, group_name->data);
4058 return NFS_ATTR_FATTR_GROUP_NAME;
4059 } else {
4060 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
4061 XDR_MAX_NETOBJ);
4062 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
4063 goto out;
4064 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
4065 return NFS_ATTR_FATTR_GROUP;
4066 }
4067 out:
4068 if (len == -EBADMSG)
4069 return -EIO;
4070 return 0;
4071 }
4072
4073 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
4074 {
4075 uint32_t major = 0, minor = 0;
4076 __be32 *p;
4077 int ret = 0;
4078
4079 *rdev = MKDEV(0,0);
4080 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
4081 return -EIO;
4082 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
4083 dev_t tmp;
4084
4085 p = xdr_inline_decode(xdr, 8);
4086 if (unlikely(!p))
4087 return -EIO;
4088 major = be32_to_cpup(p++);
4089 minor = be32_to_cpup(p);
4090 tmp = MKDEV(major, minor);
4091 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
4092 *rdev = tmp;
4093 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
4094 ret = NFS_ATTR_FATTR_RDEV;
4095 }
4096 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
4097 return ret;
4098 }
4099
4100 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4101 {
4102 __be32 *p;
4103 int status = 0;
4104
4105 *res = 0;
4106 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
4107 return -EIO;
4108 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4109 p = xdr_inline_decode(xdr, 8);
4110 if (unlikely(!p))
4111 return -EIO;
4112 xdr_decode_hyper(p, res);
4113 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4114 }
4115 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4116 return status;
4117 }
4118
4119 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4120 {
4121 __be32 *p;
4122 int status = 0;
4123
4124 *res = 0;
4125 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4126 return -EIO;
4127 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4128 p = xdr_inline_decode(xdr, 8);
4129 if (unlikely(!p))
4130 return -EIO;
4131 xdr_decode_hyper(p, res);
4132 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4133 }
4134 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4135 return status;
4136 }
4137
4138 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4139 {
4140 __be32 *p;
4141 int status = 0;
4142
4143 *res = 0;
4144 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4145 return -EIO;
4146 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4147 p = xdr_inline_decode(xdr, 8);
4148 if (unlikely(!p))
4149 return -EIO;
4150 xdr_decode_hyper(p, res);
4151 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4152 }
4153 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4154 return status;
4155 }
4156
4157 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4158 {
4159 __be32 *p;
4160 int ret = 0;
4161
4162 *used = 0;
4163 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4164 return -EIO;
4165 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4166 p = xdr_inline_decode(xdr, 8);
4167 if (unlikely(!p))
4168 return -EIO;
4169 xdr_decode_hyper(p, used);
4170 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4171 ret = NFS_ATTR_FATTR_SPACE_USED;
4172 }
4173 dprintk("%s: space used=%Lu\n", __func__,
4174 (unsigned long long)*used);
4175 return ret;
4176 }
4177
4178 static __be32 *
4179 xdr_decode_nfstime4(__be32 *p, struct timespec64 *t)
4180 {
4181 __u64 sec;
4182
4183 p = xdr_decode_hyper(p, &sec);
4184 t-> tv_sec = sec;
4185 t->tv_nsec = be32_to_cpup(p++);
4186 return p;
4187 }
4188
4189 static int decode_attr_time(struct xdr_stream *xdr, struct timespec64 *time)
4190 {
4191 __be32 *p;
4192
4193 p = xdr_inline_decode(xdr, nfstime4_maxsz << 2);
4194 if (unlikely(!p))
4195 return -EIO;
4196 xdr_decode_nfstime4(p, time);
4197 return 0;
4198 }
4199
4200 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4201 {
4202 int status = 0;
4203
4204 time->tv_sec = 0;
4205 time->tv_nsec = 0;
4206 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4207 return -EIO;
4208 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4209 status = decode_attr_time(xdr, time);
4210 if (status == 0)
4211 status = NFS_ATTR_FATTR_ATIME;
4212 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4213 }
4214 dprintk("%s: atime=%lld\n", __func__, time->tv_sec);
4215 return status;
4216 }
4217
4218 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4219 {
4220 int status = 0;
4221
4222 time->tv_sec = 0;
4223 time->tv_nsec = 0;
4224 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4225 return -EIO;
4226 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4227 status = decode_attr_time(xdr, time);
4228 if (status == 0)
4229 status = NFS_ATTR_FATTR_CTIME;
4230 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4231 }
4232 dprintk("%s: ctime=%lld\n", __func__, time->tv_sec);
4233 return status;
4234 }
4235
4236 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4237 struct timespec64 *time)
4238 {
4239 int status = 0;
4240
4241 time->tv_sec = 0;
4242 time->tv_nsec = 0;
4243 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4244 return -EIO;
4245 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4246 status = decode_attr_time(xdr, time);
4247 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4248 }
4249 dprintk("%s: time_delta=%lld %ld\n", __func__, time->tv_sec,
4250 time->tv_nsec);
4251 return status;
4252 }
4253
4254 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4255 struct nfs4_label *label)
4256 {
4257 uint32_t pi = 0;
4258 uint32_t lfs = 0;
4259 __u32 len;
4260 __be32 *p;
4261 int status = 0;
4262
4263 if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4264 return -EIO;
4265 if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4266 p = xdr_inline_decode(xdr, 4);
4267 if (unlikely(!p))
4268 return -EIO;
4269 lfs = be32_to_cpup(p++);
4270 p = xdr_inline_decode(xdr, 4);
4271 if (unlikely(!p))
4272 return -EIO;
4273 pi = be32_to_cpup(p++);
4274 p = xdr_inline_decode(xdr, 4);
4275 if (unlikely(!p))
4276 return -EIO;
4277 len = be32_to_cpup(p++);
4278 p = xdr_inline_decode(xdr, len);
4279 if (unlikely(!p))
4280 return -EIO;
4281 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4282 if (len < NFS4_MAXLABELLEN) {
4283 if (label && label->len) {
4284 if (label->len < len)
4285 return -ERANGE;
4286 memcpy(label->label, p, len);
4287 label->len = len;
4288 label->pi = pi;
4289 label->lfs = lfs;
4290 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4291 }
4292 } else
4293 printk(KERN_WARNING "%s: label too long (%u)!\n",
4294 __func__, len);
4295 if (label && label->label)
4296 dprintk("%s: label=%.*s, len=%d, PI=%d, LFS=%d\n",
4297 __func__, label->len, (char *)label->label,
4298 label->len, label->pi, label->lfs);
4299 }
4300 return status;
4301 }
4302
4303 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4304 {
4305 int status = 0;
4306
4307 time->tv_sec = 0;
4308 time->tv_nsec = 0;
4309 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4310 return -EIO;
4311 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4312 status = decode_attr_time(xdr, time);
4313 if (status == 0)
4314 status = NFS_ATTR_FATTR_MTIME;
4315 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4316 }
4317 dprintk("%s: mtime=%lld\n", __func__, time->tv_sec);
4318 return status;
4319 }
4320
4321 static int decode_attr_xattrsupport(struct xdr_stream *xdr, uint32_t *bitmap,
4322 uint32_t *res)
4323 {
4324 __be32 *p;
4325
4326 *res = 0;
4327 if (unlikely(bitmap[2] & (FATTR4_WORD2_XATTR_SUPPORT - 1U)))
4328 return -EIO;
4329 if (likely(bitmap[2] & FATTR4_WORD2_XATTR_SUPPORT)) {
4330 p = xdr_inline_decode(xdr, 4);
4331 if (unlikely(!p))
4332 return -EIO;
4333 *res = be32_to_cpup(p);
4334 bitmap[2] &= ~FATTR4_WORD2_XATTR_SUPPORT;
4335 }
4336 dprintk("%s: XATTR support=%s\n", __func__,
4337 *res == 0 ? "false" : "true");
4338 return 0;
4339 }
4340
4341 static int decode_attr_open_arguments(struct xdr_stream *xdr, uint32_t *bitmap,
4342 struct nfs4_open_caps *res)
4343 {
4344 memset(res, 0, sizeof(*res));
4345 if (unlikely(bitmap[2] & (FATTR4_WORD2_OPEN_ARGUMENTS - 1U)))
4346 return -EIO;
4347 if (likely(bitmap[2] & FATTR4_WORD2_OPEN_ARGUMENTS)) {
4348 if (decode_bitmap4(xdr, res->oa_share_access, ARRAY_SIZE(res->oa_share_access)) < 0)
4349 return -EIO;
4350 if (decode_bitmap4(xdr, res->oa_share_deny, ARRAY_SIZE(res->oa_share_deny)) < 0)
4351 return -EIO;
4352 if (decode_bitmap4(xdr, res->oa_share_access_want, ARRAY_SIZE(res->oa_share_access_want)) < 0)
4353 return -EIO;
4354 if (decode_bitmap4(xdr, res->oa_open_claim, ARRAY_SIZE(res->oa_open_claim)) < 0)
4355 return -EIO;
4356 if (decode_bitmap4(xdr, res->oa_createmode, ARRAY_SIZE(res->oa_createmode)) < 0)
4357 return -EIO;
4358 bitmap[2] &= ~FATTR4_WORD2_OPEN_ARGUMENTS;
4359 }
4360 return 0;
4361 }
4362
4363 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4364 {
4365 unsigned int attrwords = XDR_QUADLEN(attrlen);
4366 unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4367
4368 if (unlikely(attrwords != nwords)) {
4369 dprintk("%s: server returned incorrect attribute length: "
4370 "%u %c %u\n",
4371 __func__,
4372 attrwords << 2,
4373 (attrwords < nwords) ? '<' : '>',
4374 nwords << 2);
4375 return -EIO;
4376 }
4377 return 0;
4378 }
4379
4380 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4381 {
4382 __be32 *p;
4383
4384 p = xdr_inline_decode(xdr, 20);
4385 if (unlikely(!p))
4386 return -EIO;
4387 cinfo->atomic = be32_to_cpup(p++);
4388 p = xdr_decode_hyper(p, &cinfo->before);
4389 xdr_decode_hyper(p, &cinfo->after);
4390 return 0;
4391 }
4392
4393 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4394 {
4395 __be32 *p;
4396 uint32_t supp, acc;
4397 int status;
4398
4399 status = decode_op_hdr(xdr, OP_ACCESS);
4400 if (status)
4401 return status;
4402 p = xdr_inline_decode(xdr, 8);
4403 if (unlikely(!p))
4404 return -EIO;
4405 supp = be32_to_cpup(p++);
4406 acc = be32_to_cpup(p);
4407 *supported = supp;
4408 *access = acc;
4409 return 0;
4410 }
4411
4412 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4413 {
4414 ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4415 if (unlikely(ret < 0))
4416 return -EIO;
4417 return 0;
4418 }
4419
4420 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4421 {
4422 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4423 }
4424
4425 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4426 {
4427 stateid->type = NFS4_OPEN_STATEID_TYPE;
4428 return decode_stateid(xdr, stateid);
4429 }
4430
4431 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4432 {
4433 stateid->type = NFS4_LOCK_STATEID_TYPE;
4434 return decode_stateid(xdr, stateid);
4435 }
4436
4437 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4438 {
4439 stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4440 return decode_stateid(xdr, stateid);
4441 }
4442
4443 static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4444 {
4445 nfs4_stateid dummy;
4446
4447 nfs4_stateid_copy(stateid, &invalid_stateid);
4448 return decode_stateid(xdr, &dummy);
4449 }
4450
4451 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4452 {
4453 int status;
4454
4455 status = decode_op_hdr(xdr, OP_CLOSE);
4456 if (status != -EIO)
4457 nfs_increment_open_seqid(status, res->seqid);
4458 if (!status)
4459 status = decode_invalid_stateid(xdr, &res->stateid);
4460 return status;
4461 }
4462
4463 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4464 {
4465 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4466 }
4467
4468 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4469 {
4470 return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4471 }
4472
4473 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4474 {
4475 struct nfs_writeverf *verf = res->verf;
4476 int status;
4477
4478 status = decode_op_hdr(xdr, OP_COMMIT);
4479 if (!status)
4480 status = decode_write_verifier(xdr, &verf->verifier);
4481 if (!status)
4482 verf->committed = NFS_FILE_SYNC;
4483 return status;
4484 }
4485
4486 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4487 {
4488 __be32 *p;
4489 uint32_t bmlen;
4490 int status;
4491
4492 status = decode_op_hdr(xdr, OP_CREATE);
4493 if (status)
4494 return status;
4495 if ((status = decode_change_info(xdr, cinfo)))
4496 return status;
4497 p = xdr_inline_decode(xdr, 4);
4498 if (unlikely(!p))
4499 return -EIO;
4500 bmlen = be32_to_cpup(p);
4501 p = xdr_inline_decode(xdr, bmlen << 2);
4502 if (likely(p))
4503 return 0;
4504 return -EIO;
4505 }
4506
4507 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4508 {
4509 unsigned int savep;
4510 uint32_t attrlen, bitmap[3] = {0};
4511 int status;
4512
4513 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4514 goto xdr_error;
4515 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4516 goto xdr_error;
4517 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4518 goto xdr_error;
4519 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4520 goto xdr_error;
4521 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4522 &res->fh_expire_type)) != 0)
4523 goto xdr_error;
4524 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4525 goto xdr_error;
4526 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4527 goto xdr_error;
4528 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4529 goto xdr_error;
4530 if ((status = decode_attr_case_insensitive(xdr, bitmap, &res->case_insensitive)) != 0)
4531 goto xdr_error;
4532 if ((status = decode_attr_case_preserving(xdr, bitmap, &res->case_preserving)) != 0)
4533 goto xdr_error;
4534 if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4535 res->exclcreat_bitmask)) != 0)
4536 goto xdr_error;
4537 if ((status = decode_attr_open_arguments(xdr, bitmap, &res->open_caps)) != 0)
4538 goto xdr_error;
4539 status = verify_attr_len(xdr, savep, attrlen);
4540 xdr_error:
4541 dprintk("%s: xdr returned %d!\n", __func__, -status);
4542 return status;
4543 }
4544
4545 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4546 {
4547 unsigned int savep;
4548 uint32_t attrlen, bitmap[3] = {0};
4549 int status;
4550
4551 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4552 goto xdr_error;
4553 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4554 goto xdr_error;
4555 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4556 goto xdr_error;
4557
4558 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4559 goto xdr_error;
4560 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4561 goto xdr_error;
4562 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4563 goto xdr_error;
4564
4565 status = -EIO;
4566 if (unlikely(bitmap[0]))
4567 goto xdr_error;
4568
4569 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4570 goto xdr_error;
4571 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4572 goto xdr_error;
4573 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4574 goto xdr_error;
4575
4576 status = verify_attr_len(xdr, savep, attrlen);
4577 xdr_error:
4578 dprintk("%s: xdr returned %d!\n", __func__, -status);
4579 return status;
4580 }
4581
4582 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4583 {
4584 unsigned int savep;
4585 uint32_t attrlen, bitmap[3] = {0};
4586 int status;
4587
4588 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4589 goto xdr_error;
4590 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4591 goto xdr_error;
4592 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4593 goto xdr_error;
4594
4595 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4596 goto xdr_error;
4597 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4598 goto xdr_error;
4599
4600 status = verify_attr_len(xdr, savep, attrlen);
4601 xdr_error:
4602 dprintk("%s: xdr returned %d!\n", __func__, -status);
4603 return status;
4604 }
4605
4606 static int decode_threshold_hint(struct xdr_stream *xdr,
4607 uint32_t *bitmap,
4608 uint64_t *res,
4609 uint32_t hint_bit)
4610 {
4611 __be32 *p;
4612
4613 *res = 0;
4614 if (likely(bitmap[0] & hint_bit)) {
4615 p = xdr_inline_decode(xdr, 8);
4616 if (unlikely(!p))
4617 return -EIO;
4618 xdr_decode_hyper(p, res);
4619 }
4620 return 0;
4621 }
4622
4623 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4624 struct nfs4_threshold *res)
4625 {
4626 __be32 *p;
4627 unsigned int savep;
4628 uint32_t bitmap[3] = {0,}, attrlen;
4629 int status;
4630
4631 /* layout type */
4632 p = xdr_inline_decode(xdr, 4);
4633 if (unlikely(!p))
4634 return -EIO;
4635 res->l_type = be32_to_cpup(p);
4636
4637 /* thi_hintset bitmap */
4638 status = decode_attr_bitmap(xdr, bitmap);
4639 if (status < 0)
4640 goto xdr_error;
4641
4642 /* thi_hintlist length */
4643 status = decode_attr_length(xdr, &attrlen, &savep);
4644 if (status < 0)
4645 goto xdr_error;
4646 /* thi_hintlist */
4647 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4648 if (status < 0)
4649 goto xdr_error;
4650 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4651 if (status < 0)
4652 goto xdr_error;
4653 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4654 THRESHOLD_RD_IO);
4655 if (status < 0)
4656 goto xdr_error;
4657 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4658 THRESHOLD_WR_IO);
4659 if (status < 0)
4660 goto xdr_error;
4661
4662 status = verify_attr_len(xdr, savep, attrlen);
4663 res->bm = bitmap[0];
4664
4665 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4666 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4667 res->wr_io_sz);
4668 xdr_error:
4669 dprintk("%s ret=%d!\n", __func__, status);
4670 return status;
4671 }
4672
4673 /*
4674 * Thresholds on pNFS direct I/O vrs MDS I/O
4675 */
4676 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4677 uint32_t *bitmap,
4678 struct nfs4_threshold *res)
4679 {
4680 __be32 *p;
4681 int status = 0;
4682 uint32_t num;
4683
4684 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4685 return -EIO;
4686 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4687 /* Did the server return an unrequested attribute? */
4688 if (unlikely(res == NULL))
4689 return -EREMOTEIO;
4690 p = xdr_inline_decode(xdr, 4);
4691 if (unlikely(!p))
4692 return -EIO;
4693 num = be32_to_cpup(p);
4694 if (num == 0)
4695 return 0;
4696 if (num > 1)
4697 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4698 "drivers per filesystem not supported\n",
4699 __func__);
4700
4701 status = decode_first_threshold_item4(xdr, res);
4702 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4703 }
4704 return status;
4705 }
4706
4707 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4708 struct nfs_fattr *fattr, struct nfs_fh *fh,
4709 struct nfs4_fs_locations *fs_loc, const struct nfs_server *server)
4710 {
4711 int status;
4712 umode_t fmode = 0;
4713 uint32_t type;
4714 int32_t err;
4715
4716 status = decode_attr_type(xdr, bitmap, &type);
4717 if (status < 0)
4718 goto xdr_error;
4719 fattr->mode = 0;
4720 if (status != 0) {
4721 fattr->mode |= nfs_type2fmt[type];
4722 fattr->valid |= status;
4723 }
4724
4725 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4726 if (status < 0)
4727 goto xdr_error;
4728 fattr->valid |= status;
4729
4730 status = decode_attr_size(xdr, bitmap, &fattr->size);
4731 if (status < 0)
4732 goto xdr_error;
4733 fattr->valid |= status;
4734
4735 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4736 if (status < 0)
4737 goto xdr_error;
4738 fattr->valid |= status;
4739
4740 err = 0;
4741 status = decode_attr_error(xdr, bitmap, &err);
4742 if (status < 0)
4743 goto xdr_error;
4744
4745 status = decode_attr_filehandle(xdr, bitmap, fh);
4746 if (status < 0)
4747 goto xdr_error;
4748
4749 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4750 if (status < 0)
4751 goto xdr_error;
4752 fattr->valid |= status;
4753
4754 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4755 if (status < 0)
4756 goto xdr_error;
4757 fattr->valid |= status;
4758
4759 status = -EIO;
4760 if (unlikely(bitmap[0]))
4761 goto xdr_error;
4762
4763 status = decode_attr_mode(xdr, bitmap, &fmode);
4764 if (status < 0)
4765 goto xdr_error;
4766 if (status != 0) {
4767 fattr->mode |= fmode;
4768 fattr->valid |= status;
4769 }
4770
4771 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4772 if (status < 0)
4773 goto xdr_error;
4774 fattr->valid |= status;
4775
4776 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4777 if (status < 0)
4778 goto xdr_error;
4779 fattr->valid |= status;
4780
4781 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4782 if (status < 0)
4783 goto xdr_error;
4784 fattr->valid |= status;
4785
4786 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4787 if (status < 0)
4788 goto xdr_error;
4789 fattr->valid |= status;
4790
4791 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4792 if (status < 0)
4793 goto xdr_error;
4794 fattr->valid |= status;
4795
4796 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4797 if (status < 0)
4798 goto xdr_error;
4799 fattr->valid |= status;
4800
4801 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4802 if (status < 0)
4803 goto xdr_error;
4804 fattr->valid |= status;
4805
4806 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4807 if (status < 0)
4808 goto xdr_error;
4809 fattr->valid |= status;
4810
4811 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4812 if (status < 0)
4813 goto xdr_error;
4814 fattr->valid |= status;
4815
4816 status = -EIO;
4817 if (unlikely(bitmap[1]))
4818 goto xdr_error;
4819
4820 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4821 if (status < 0)
4822 goto xdr_error;
4823
4824 status = decode_attr_security_label(xdr, bitmap, fattr->label);
4825 if (status < 0)
4826 goto xdr_error;
4827 fattr->valid |= status;
4828
4829 xdr_error:
4830 dprintk("%s: xdr returned %d\n", __func__, -status);
4831 return status;
4832 }
4833
4834 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4835 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4836 const struct nfs_server *server)
4837 {
4838 unsigned int savep;
4839 uint32_t attrlen,
4840 bitmap[3] = {0};
4841 int status;
4842
4843 status = decode_op_hdr(xdr, OP_GETATTR);
4844 if (status < 0)
4845 goto xdr_error;
4846
4847 status = decode_attr_bitmap(xdr, bitmap);
4848 if (status < 0)
4849 goto xdr_error;
4850
4851 status = decode_attr_length(xdr, &attrlen, &savep);
4852 if (status < 0)
4853 goto xdr_error;
4854
4855 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, server);
4856 if (status < 0)
4857 goto xdr_error;
4858
4859 status = verify_attr_len(xdr, savep, attrlen);
4860 xdr_error:
4861 dprintk("%s: xdr returned %d\n", __func__, -status);
4862 return status;
4863 }
4864
4865 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4866 const struct nfs_server *server)
4867 {
4868 return decode_getfattr_generic(xdr, fattr, NULL, NULL, server);
4869 }
4870
4871 /*
4872 * Decode potentially multiple layout types.
4873 */
4874 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4875 struct nfs_fsinfo *fsinfo)
4876 {
4877 __be32 *p;
4878 uint32_t i;
4879
4880 p = xdr_inline_decode(xdr, 4);
4881 if (unlikely(!p))
4882 return -EIO;
4883 fsinfo->nlayouttypes = be32_to_cpup(p);
4884
4885 /* pNFS is not supported by the underlying file system */
4886 if (fsinfo->nlayouttypes == 0)
4887 return 0;
4888
4889 /* Decode and set first layout type, move xdr->p past unused types */
4890 p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4891 if (unlikely(!p))
4892 return -EIO;
4893
4894 /* If we get too many, then just cap it at the max */
4895 if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4896 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4897 __func__, fsinfo->nlayouttypes);
4898 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4899 }
4900
4901 for(i = 0; i < fsinfo->nlayouttypes; ++i)
4902 fsinfo->layouttype[i] = be32_to_cpup(p++);
4903 return 0;
4904 }
4905
4906 /*
4907 * The type of file system exported.
4908 * Note we must ensure that layouttype is set in any non-error case.
4909 */
4910 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4911 struct nfs_fsinfo *fsinfo)
4912 {
4913 int status = 0;
4914
4915 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4916 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4917 return -EIO;
4918 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4919 status = decode_pnfs_layout_types(xdr, fsinfo);
4920 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4921 }
4922 return status;
4923 }
4924
4925 /*
4926 * The prefered block size for layout directed io
4927 */
4928 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4929 uint32_t *res)
4930 {
4931 __be32 *p;
4932
4933 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4934 *res = 0;
4935 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4936 p = xdr_inline_decode(xdr, 4);
4937 if (unlikely(!p))
4938 return -EIO;
4939 *res = be32_to_cpup(p);
4940 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4941 }
4942 return 0;
4943 }
4944
4945 /*
4946 * The granularity of a CLONE operation.
4947 */
4948 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4949 uint32_t *res)
4950 {
4951 __be32 *p;
4952
4953 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4954 *res = 0;
4955 if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4956 p = xdr_inline_decode(xdr, 4);
4957 if (unlikely(!p))
4958 return -EIO;
4959 *res = be32_to_cpup(p);
4960 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4961 }
4962 return 0;
4963 }
4964
4965 static int decode_attr_change_attr_type(struct xdr_stream *xdr,
4966 uint32_t *bitmap,
4967 enum nfs4_change_attr_type *res)
4968 {
4969 u32 tmp = NFS4_CHANGE_TYPE_IS_UNDEFINED;
4970
4971 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4972 if (bitmap[2] & FATTR4_WORD2_CHANGE_ATTR_TYPE) {
4973 if (xdr_stream_decode_u32(xdr, &tmp))
4974 return -EIO;
4975 bitmap[2] &= ~FATTR4_WORD2_CHANGE_ATTR_TYPE;
4976 }
4977
4978 switch(tmp) {
4979 case NFS4_CHANGE_TYPE_IS_MONOTONIC_INCR:
4980 case NFS4_CHANGE_TYPE_IS_VERSION_COUNTER:
4981 case NFS4_CHANGE_TYPE_IS_VERSION_COUNTER_NOPNFS:
4982 case NFS4_CHANGE_TYPE_IS_TIME_METADATA:
4983 *res = tmp;
4984 break;
4985 default:
4986 *res = NFS4_CHANGE_TYPE_IS_UNDEFINED;
4987 }
4988 return 0;
4989 }
4990
4991 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4992 {
4993 unsigned int savep;
4994 uint32_t attrlen, bitmap[3];
4995 int status;
4996
4997 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4998 goto xdr_error;
4999 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5000 goto xdr_error;
5001 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5002 goto xdr_error;
5003
5004 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
5005
5006 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
5007 goto xdr_error;
5008 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
5009 goto xdr_error;
5010 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
5011 goto xdr_error;
5012 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
5013 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
5014 goto xdr_error;
5015 fsinfo->wtpref = fsinfo->wtmax;
5016
5017 status = -EIO;
5018 if (unlikely(bitmap[0]))
5019 goto xdr_error;
5020
5021 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
5022 if (status != 0)
5023 goto xdr_error;
5024 status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
5025 if (status != 0)
5026 goto xdr_error;
5027
5028 status = -EIO;
5029 if (unlikely(bitmap[1]))
5030 goto xdr_error;
5031
5032 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
5033 if (status)
5034 goto xdr_error;
5035 status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
5036 if (status)
5037 goto xdr_error;
5038
5039 status = decode_attr_change_attr_type(xdr, bitmap,
5040 &fsinfo->change_attr_type);
5041 if (status)
5042 goto xdr_error;
5043
5044 status = decode_attr_xattrsupport(xdr, bitmap,
5045 &fsinfo->xattr_support);
5046 if (status)
5047 goto xdr_error;
5048
5049 status = verify_attr_len(xdr, savep, attrlen);
5050 xdr_error:
5051 dprintk("%s: xdr returned %d!\n", __func__, -status);
5052 return status;
5053 }
5054
5055 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
5056 {
5057 __be32 *p;
5058 uint32_t len;
5059 int status;
5060
5061 /* Zero handle first to allow comparisons */
5062 memset(fh, 0, sizeof(*fh));
5063
5064 status = decode_op_hdr(xdr, OP_GETFH);
5065 if (status)
5066 return status;
5067
5068 p = xdr_inline_decode(xdr, 4);
5069 if (unlikely(!p))
5070 return -EIO;
5071 len = be32_to_cpup(p);
5072 if (len > NFS4_FHSIZE || len == 0) {
5073 trace_nfs4_xdr_bad_filehandle(xdr, OP_GETFH, NFS4ERR_BADHANDLE);
5074 return -EREMOTEIO;
5075 }
5076 fh->size = len;
5077 p = xdr_inline_decode(xdr, len);
5078 if (unlikely(!p))
5079 return -EIO;
5080 memcpy(fh->data, p, len);
5081 return 0;
5082 }
5083
5084 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5085 {
5086 int status;
5087
5088 status = decode_op_hdr(xdr, OP_LINK);
5089 if (status)
5090 return status;
5091 return decode_change_info(xdr, cinfo);
5092 }
5093
5094 /*
5095 * We create the owner, so we know a proper owner.id length is 4.
5096 */
5097 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
5098 {
5099 uint64_t offset, length, clientid;
5100 __be32 *p;
5101 uint32_t namelen, type;
5102
5103 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
5104 if (unlikely(!p))
5105 return -EIO;
5106 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
5107 p = xdr_decode_hyper(p, &length);
5108 type = be32_to_cpup(p++); /* 4 byte read */
5109 if (fl != NULL) { /* manipulate file lock */
5110 fl->fl_start = (loff_t)offset;
5111 fl->fl_end = fl->fl_start + (loff_t)length - 1;
5112 if (length == ~(uint64_t)0)
5113 fl->fl_end = OFFSET_MAX;
5114 fl->c.flc_type = F_WRLCK;
5115 if (type & 1)
5116 fl->c.flc_type = F_RDLCK;
5117 fl->c.flc_pid = 0;
5118 }
5119 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
5120 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
5121 p = xdr_inline_decode(xdr, namelen); /* variable size field */
5122 if (likely(!p))
5123 return -EIO;
5124 return -NFS4ERR_DENIED;
5125 }
5126
5127 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
5128 {
5129 int status;
5130
5131 status = decode_op_hdr(xdr, OP_LOCK);
5132 if (status == -EIO)
5133 goto out;
5134 if (status == 0) {
5135 status = decode_lock_stateid(xdr, &res->stateid);
5136 if (unlikely(status))
5137 goto out;
5138 } else if (status == -NFS4ERR_DENIED)
5139 status = decode_lock_denied(xdr, NULL);
5140 if (res->open_seqid != NULL)
5141 nfs_increment_open_seqid(status, res->open_seqid);
5142 nfs_increment_lock_seqid(status, res->lock_seqid);
5143 out:
5144 return status;
5145 }
5146
5147 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
5148 {
5149 int status;
5150 status = decode_op_hdr(xdr, OP_LOCKT);
5151 if (status == -NFS4ERR_DENIED)
5152 return decode_lock_denied(xdr, res->denied);
5153 return status;
5154 }
5155
5156 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
5157 {
5158 int status;
5159
5160 status = decode_op_hdr(xdr, OP_LOCKU);
5161 if (status != -EIO)
5162 nfs_increment_lock_seqid(status, res->seqid);
5163 if (status == 0)
5164 status = decode_lock_stateid(xdr, &res->stateid);
5165 return status;
5166 }
5167
5168 static int decode_release_lockowner(struct xdr_stream *xdr)
5169 {
5170 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5171 }
5172
5173 static int decode_lookup(struct xdr_stream *xdr)
5174 {
5175 return decode_op_hdr(xdr, OP_LOOKUP);
5176 }
5177
5178 static int decode_lookupp(struct xdr_stream *xdr)
5179 {
5180 return decode_op_hdr(xdr, OP_LOOKUPP);
5181 }
5182
5183 /* This is too sick! */
5184 static int decode_space_limit(struct xdr_stream *xdr,
5185 unsigned long *pagemod_limit)
5186 {
5187 __be32 *p;
5188 uint32_t limit_type, nblocks, blocksize;
5189 u64 maxsize = 0;
5190
5191 p = xdr_inline_decode(xdr, 12);
5192 if (unlikely(!p))
5193 return -EIO;
5194 limit_type = be32_to_cpup(p++);
5195 switch (limit_type) {
5196 case NFS4_LIMIT_SIZE:
5197 xdr_decode_hyper(p, &maxsize);
5198 break;
5199 case NFS4_LIMIT_BLOCKS:
5200 nblocks = be32_to_cpup(p++);
5201 blocksize = be32_to_cpup(p);
5202 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5203 }
5204 maxsize >>= PAGE_SHIFT;
5205 *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5206 return 0;
5207 }
5208
5209 static int decode_rw_delegation(struct xdr_stream *xdr,
5210 struct nfs4_open_delegation *res)
5211 {
5212 __be32 *p;
5213 int status;
5214
5215 status = decode_delegation_stateid(xdr, &res->stateid);
5216 if (unlikely(status))
5217 return status;
5218 p = xdr_inline_decode(xdr, 4);
5219 if (unlikely(!p))
5220 return -EIO;
5221 res->do_recall = be32_to_cpup(p);
5222
5223 switch (res->open_delegation_type) {
5224 case NFS4_OPEN_DELEGATE_READ:
5225 case NFS4_OPEN_DELEGATE_READ_ATTRS_DELEG:
5226 res->type = FMODE_READ;
5227 break;
5228 case NFS4_OPEN_DELEGATE_WRITE:
5229 case NFS4_OPEN_DELEGATE_WRITE_ATTRS_DELEG:
5230 res->type = FMODE_WRITE|FMODE_READ;
5231 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5232 return -EIO;
5233 }
5234 return decode_ace(xdr, NULL);
5235 }
5236
5237 static int decode_no_delegation(struct xdr_stream *xdr,
5238 struct nfs4_open_delegation *res)
5239 {
5240 __be32 *p;
5241
5242 p = xdr_inline_decode(xdr, 4);
5243 if (unlikely(!p))
5244 return -EIO;
5245 res->why_no_delegation = be32_to_cpup(p);
5246 switch (res->why_no_delegation) {
5247 case WND4_CONTENTION:
5248 case WND4_RESOURCE:
5249 p = xdr_inline_decode(xdr, 4);
5250 if (unlikely(!p))
5251 return -EIO;
5252 res->will_notify = be32_to_cpup(p);
5253 }
5254 return 0;
5255 }
5256
5257 static int decode_delegation(struct xdr_stream *xdr,
5258 struct nfs4_open_delegation *res)
5259 {
5260 __be32 *p;
5261
5262 p = xdr_inline_decode(xdr, 4);
5263 if (unlikely(!p))
5264 return -EIO;
5265 res->open_delegation_type = be32_to_cpup(p);
5266 switch (res->open_delegation_type) {
5267 case NFS4_OPEN_DELEGATE_NONE:
5268 return 0;
5269 case NFS4_OPEN_DELEGATE_READ:
5270 case NFS4_OPEN_DELEGATE_WRITE:
5271 case NFS4_OPEN_DELEGATE_READ_ATTRS_DELEG:
5272 case NFS4_OPEN_DELEGATE_WRITE_ATTRS_DELEG:
5273 return decode_rw_delegation(xdr, res);
5274 case NFS4_OPEN_DELEGATE_NONE_EXT:
5275 return decode_no_delegation(xdr, res);
5276 }
5277 return -EIO;
5278 }
5279
5280 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5281 {
5282 __be32 *p;
5283 uint32_t savewords, bmlen, i;
5284 int status;
5285
5286 if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5287 return status;
5288 nfs_increment_open_seqid(status, res->seqid);
5289 if (status)
5290 return status;
5291 status = decode_open_stateid(xdr, &res->stateid);
5292 if (unlikely(status))
5293 return status;
5294
5295 decode_change_info(xdr, &res->cinfo);
5296
5297 p = xdr_inline_decode(xdr, 8);
5298 if (unlikely(!p))
5299 return -EIO;
5300 res->rflags = be32_to_cpup(p++);
5301 bmlen = be32_to_cpup(p);
5302 if (bmlen > 10)
5303 goto xdr_error;
5304
5305 p = xdr_inline_decode(xdr, bmlen << 2);
5306 if (unlikely(!p))
5307 return -EIO;
5308 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5309 for (i = 0; i < savewords; ++i)
5310 res->attrset[i] = be32_to_cpup(p++);
5311 for (; i < NFS4_BITMAP_SIZE; i++)
5312 res->attrset[i] = 0;
5313
5314 return decode_delegation(xdr, &res->delegation);
5315 xdr_error:
5316 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5317 return -EIO;
5318 }
5319
5320 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5321 {
5322 int status;
5323
5324 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5325 if (status != -EIO)
5326 nfs_increment_open_seqid(status, res->seqid);
5327 if (!status)
5328 status = decode_open_stateid(xdr, &res->stateid);
5329 return status;
5330 }
5331
5332 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5333 {
5334 int status;
5335
5336 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5337 if (status != -EIO)
5338 nfs_increment_open_seqid(status, res->seqid);
5339 if (!status)
5340 status = decode_open_stateid(xdr, &res->stateid);
5341 return status;
5342 }
5343
5344 static int decode_putfh(struct xdr_stream *xdr)
5345 {
5346 return decode_op_hdr(xdr, OP_PUTFH);
5347 }
5348
5349 static int decode_putrootfh(struct xdr_stream *xdr)
5350 {
5351 return decode_op_hdr(xdr, OP_PUTROOTFH);
5352 }
5353
5354 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5355 struct nfs_pgio_res *res)
5356 {
5357 __be32 *p;
5358 uint32_t count, eof, recvd;
5359 int status;
5360
5361 status = decode_op_hdr(xdr, OP_READ);
5362 if (status)
5363 return status;
5364 p = xdr_inline_decode(xdr, 8);
5365 if (unlikely(!p))
5366 return -EIO;
5367 eof = be32_to_cpup(p++);
5368 count = be32_to_cpup(p);
5369 recvd = xdr_read_pages(xdr, count);
5370 if (count > recvd) {
5371 dprintk("NFS: server cheating in read reply: "
5372 "count %u > recvd %u\n", count, recvd);
5373 count = recvd;
5374 eof = 0;
5375 }
5376 res->eof = eof;
5377 res->count = count;
5378 return 0;
5379 }
5380
5381 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5382 {
5383 int status;
5384 __be32 verf[2];
5385
5386 status = decode_op_hdr(xdr, OP_READDIR);
5387 if (!status)
5388 status = decode_verifier(xdr, readdir->verifier.data);
5389 if (unlikely(status))
5390 return status;
5391 memcpy(verf, readdir->verifier.data, sizeof(verf));
5392 dprintk("%s: verifier = %08x:%08x\n",
5393 __func__, verf[0], verf[1]);
5394 return xdr_read_pages(xdr, xdr->buf->page_len);
5395 }
5396
5397 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5398 {
5399 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5400 u32 len, recvd;
5401 __be32 *p;
5402 int status;
5403
5404 status = decode_op_hdr(xdr, OP_READLINK);
5405 if (status)
5406 return status;
5407
5408 /* Convert length of symlink */
5409 p = xdr_inline_decode(xdr, 4);
5410 if (unlikely(!p))
5411 return -EIO;
5412 len = be32_to_cpup(p);
5413 if (len >= rcvbuf->page_len || len <= 0) {
5414 dprintk("nfs: server returned giant symlink!\n");
5415 return -ENAMETOOLONG;
5416 }
5417 recvd = xdr_read_pages(xdr, len);
5418 if (recvd < len) {
5419 dprintk("NFS: server cheating in readlink reply: "
5420 "count %u > recvd %u\n", len, recvd);
5421 return -EIO;
5422 }
5423 /*
5424 * The XDR encode routine has set things up so that
5425 * the link text will be copied directly into the
5426 * buffer. We just have to do overflow-checking,
5427 * and null-terminate the text (the VFS expects
5428 * null-termination).
5429 */
5430 xdr_terminate_string(rcvbuf, len);
5431 return 0;
5432 }
5433
5434 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5435 {
5436 int status;
5437
5438 status = decode_op_hdr(xdr, OP_REMOVE);
5439 if (status)
5440 goto out;
5441 status = decode_change_info(xdr, cinfo);
5442 out:
5443 return status;
5444 }
5445
5446 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5447 struct nfs4_change_info *new_cinfo)
5448 {
5449 int status;
5450
5451 status = decode_op_hdr(xdr, OP_RENAME);
5452 if (status)
5453 goto out;
5454 if ((status = decode_change_info(xdr, old_cinfo)))
5455 goto out;
5456 status = decode_change_info(xdr, new_cinfo);
5457 out:
5458 return status;
5459 }
5460
5461 static int decode_renew(struct xdr_stream *xdr)
5462 {
5463 return decode_op_hdr(xdr, OP_RENEW);
5464 }
5465
5466 static int
5467 decode_restorefh(struct xdr_stream *xdr)
5468 {
5469 return decode_op_hdr(xdr, OP_RESTOREFH);
5470 }
5471
5472 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5473 struct nfs_getaclres *res, enum nfs4_acl_type type)
5474 {
5475 unsigned int savep;
5476 uint32_t attrlen,
5477 bitmap[3] = {0};
5478 int status;
5479
5480 res->acl_len = 0;
5481 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5482 goto out;
5483
5484 xdr_enter_page(xdr, xdr->buf->page_len);
5485
5486 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5487 goto out;
5488 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5489 goto out;
5490
5491 switch (type) {
5492 default:
5493 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5494 return -EIO;
5495 if (!(bitmap[0] & FATTR4_WORD0_ACL))
5496 return -EOPNOTSUPP;
5497 break;
5498 case NFS4ACL_DACL:
5499 if (unlikely(bitmap[0] || bitmap[1] & (FATTR4_WORD1_DACL - 1U)))
5500 return -EIO;
5501 if (!(bitmap[1] & FATTR4_WORD1_DACL))
5502 return -EOPNOTSUPP;
5503 break;
5504 case NFS4ACL_SACL:
5505 if (unlikely(bitmap[0] || bitmap[1] & (FATTR4_WORD1_SACL - 1U)))
5506 return -EIO;
5507 if (!(bitmap[1] & FATTR4_WORD1_SACL))
5508 return -EOPNOTSUPP;
5509 }
5510
5511 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5512 * are stored with the acl data to handle the problem of
5513 * variable length bitmaps.*/
5514 res->acl_data_offset = xdr_page_pos(xdr);
5515 res->acl_len = attrlen;
5516
5517 /* Check for receive buffer overflow */
5518 if (res->acl_len > xdr_stream_remaining(xdr) ||
5519 res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5520 res->acl_flags |= NFS4_ACL_TRUNC;
5521 dprintk("NFS: acl reply: attrlen %u > page_len %zu\n",
5522 attrlen, xdr_stream_remaining(xdr));
5523 }
5524 out:
5525 return status;
5526 }
5527
5528 static int
5529 decode_savefh(struct xdr_stream *xdr)
5530 {
5531 return decode_op_hdr(xdr, OP_SAVEFH);
5532 }
5533
5534 static int decode_setattr(struct xdr_stream *xdr)
5535 {
5536 int status;
5537
5538 status = decode_op_hdr(xdr, OP_SETATTR);
5539 if (status)
5540 return status;
5541 if (decode_bitmap4(xdr, NULL, 0) >= 0)
5542 return 0;
5543 return -EIO;
5544 }
5545
5546 static int decode_delegattr(struct xdr_stream *xdr)
5547 {
5548 return decode_setattr(xdr);
5549 }
5550
5551 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5552 {
5553 __be32 *p;
5554 uint32_t opnum;
5555 int32_t nfserr;
5556
5557 p = xdr_inline_decode(xdr, 8);
5558 if (unlikely(!p))
5559 return -EIO;
5560 opnum = be32_to_cpup(p++);
5561 if (opnum != OP_SETCLIENTID) {
5562 dprintk("nfs: decode_setclientid: Server returned operation"
5563 " %d\n", opnum);
5564 return -EIO;
5565 }
5566 nfserr = be32_to_cpup(p);
5567 if (nfserr == NFS_OK) {
5568 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5569 if (unlikely(!p))
5570 return -EIO;
5571 p = xdr_decode_hyper(p, &res->clientid);
5572 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5573 } else if (nfserr == NFSERR_CLID_INUSE) {
5574 uint32_t len;
5575
5576 /* skip netid string */
5577 p = xdr_inline_decode(xdr, 4);
5578 if (unlikely(!p))
5579 return -EIO;
5580 len = be32_to_cpup(p);
5581 p = xdr_inline_decode(xdr, len);
5582 if (unlikely(!p))
5583 return -EIO;
5584
5585 /* skip uaddr string */
5586 p = xdr_inline_decode(xdr, 4);
5587 if (unlikely(!p))
5588 return -EIO;
5589 len = be32_to_cpup(p);
5590 p = xdr_inline_decode(xdr, len);
5591 if (unlikely(!p))
5592 return -EIO;
5593 return -NFSERR_CLID_INUSE;
5594 } else
5595 return nfs4_stat_to_errno(nfserr);
5596
5597 return 0;
5598 }
5599
5600 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5601 {
5602 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5603 }
5604
5605 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5606 {
5607 __be32 *p;
5608 int status;
5609
5610 status = decode_op_hdr(xdr, OP_WRITE);
5611 if (status)
5612 return status;
5613
5614 p = xdr_inline_decode(xdr, 8);
5615 if (unlikely(!p))
5616 return -EIO;
5617 res->count = be32_to_cpup(p++);
5618 res->verf->committed = be32_to_cpup(p++);
5619 return decode_write_verifier(xdr, &res->verf->verifier);
5620 }
5621
5622 static int decode_delegreturn(struct xdr_stream *xdr)
5623 {
5624 return decode_op_hdr(xdr, OP_DELEGRETURN);
5625 }
5626
5627 static int decode_secinfo_gss(struct xdr_stream *xdr,
5628 struct nfs4_secinfo4 *flavor)
5629 {
5630 u32 oid_len;
5631 __be32 *p;
5632
5633 p = xdr_inline_decode(xdr, 4);
5634 if (unlikely(!p))
5635 return -EIO;
5636 oid_len = be32_to_cpup(p);
5637 if (oid_len > GSS_OID_MAX_LEN)
5638 return -EINVAL;
5639
5640 p = xdr_inline_decode(xdr, oid_len);
5641 if (unlikely(!p))
5642 return -EIO;
5643 memcpy(flavor->flavor_info.oid.data, p, oid_len);
5644 flavor->flavor_info.oid.len = oid_len;
5645
5646 p = xdr_inline_decode(xdr, 8);
5647 if (unlikely(!p))
5648 return -EIO;
5649 flavor->flavor_info.qop = be32_to_cpup(p++);
5650 flavor->flavor_info.service = be32_to_cpup(p);
5651
5652 return 0;
5653 }
5654
5655 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5656 {
5657 struct nfs4_secinfo4 *sec_flavor;
5658 unsigned int i, num_flavors;
5659 int status;
5660 __be32 *p;
5661
5662 p = xdr_inline_decode(xdr, 4);
5663 if (unlikely(!p))
5664 return -EIO;
5665
5666 res->flavors->num_flavors = 0;
5667 num_flavors = be32_to_cpup(p);
5668
5669 for (i = 0; i < num_flavors; i++) {
5670 sec_flavor = &res->flavors->flavors[i];
5671 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5672 break;
5673
5674 p = xdr_inline_decode(xdr, 4);
5675 if (unlikely(!p))
5676 return -EIO;
5677 sec_flavor->flavor = be32_to_cpup(p);
5678
5679 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5680 status = decode_secinfo_gss(xdr, sec_flavor);
5681 if (status)
5682 goto out;
5683 }
5684 res->flavors->num_flavors++;
5685 }
5686
5687 status = 0;
5688 out:
5689 return status;
5690 }
5691
5692 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5693 {
5694 int status = decode_op_hdr(xdr, OP_SECINFO);
5695 if (status)
5696 return status;
5697 return decode_secinfo_common(xdr, res);
5698 }
5699
5700 #if defined(CONFIG_NFS_V4_1)
5701 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5702 {
5703 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5704 if (status)
5705 return status;
5706 return decode_secinfo_common(xdr, res);
5707 }
5708
5709 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5710 {
5711 if (xdr_stream_decode_uint32_array(xdr, op_map->u.words,
5712 ARRAY_SIZE(op_map->u.words)) < 0)
5713 return -EIO;
5714 return 0;
5715 }
5716
5717 static int decode_exchange_id(struct xdr_stream *xdr,
5718 struct nfs41_exchange_id_res *res)
5719 {
5720 __be32 *p;
5721 uint32_t dummy;
5722 char *dummy_str;
5723 int status;
5724 uint32_t impl_id_count;
5725
5726 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5727 if (status)
5728 return status;
5729
5730 p = xdr_inline_decode(xdr, 8);
5731 if (unlikely(!p))
5732 return -EIO;
5733 xdr_decode_hyper(p, &res->clientid);
5734 p = xdr_inline_decode(xdr, 12);
5735 if (unlikely(!p))
5736 return -EIO;
5737 res->seqid = be32_to_cpup(p++);
5738 res->flags = be32_to_cpup(p++);
5739
5740 res->state_protect.how = be32_to_cpup(p);
5741 switch (res->state_protect.how) {
5742 case SP4_NONE:
5743 break;
5744 case SP4_MACH_CRED:
5745 status = decode_op_map(xdr, &res->state_protect.enforce);
5746 if (status)
5747 return status;
5748 status = decode_op_map(xdr, &res->state_protect.allow);
5749 if (status)
5750 return status;
5751 break;
5752 default:
5753 WARN_ON_ONCE(1);
5754 return -EIO;
5755 }
5756
5757 /* server_owner4.so_minor_id */
5758 p = xdr_inline_decode(xdr, 8);
5759 if (unlikely(!p))
5760 return -EIO;
5761 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5762
5763 /* server_owner4.so_major_id */
5764 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5765 if (unlikely(status))
5766 return status;
5767 memcpy(res->server_owner->major_id, dummy_str, dummy);
5768 res->server_owner->major_id_sz = dummy;
5769
5770 /* server_scope4 */
5771 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5772 if (unlikely(status))
5773 return status;
5774 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5775 res->server_scope->server_scope_sz = dummy;
5776
5777 /* Implementation Id */
5778 p = xdr_inline_decode(xdr, 4);
5779 if (unlikely(!p))
5780 return -EIO;
5781 impl_id_count = be32_to_cpup(p++);
5782
5783 if (impl_id_count) {
5784 /* nii_domain */
5785 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5786 if (unlikely(status))
5787 return status;
5788 memcpy(res->impl_id->domain, dummy_str, dummy);
5789
5790 /* nii_name */
5791 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5792 if (unlikely(status))
5793 return status;
5794 memcpy(res->impl_id->name, dummy_str, dummy);
5795
5796 /* nii_date */
5797 p = xdr_inline_decode(xdr, 12);
5798 if (unlikely(!p))
5799 return -EIO;
5800 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5801 res->impl_id->date.nseconds = be32_to_cpup(p);
5802
5803 /* if there's more than one entry, ignore the rest */
5804 }
5805 return 0;
5806 }
5807
5808 static int decode_chan_attrs(struct xdr_stream *xdr,
5809 struct nfs4_channel_attrs *attrs)
5810 {
5811 __be32 *p;
5812 u32 nr_attrs, val;
5813
5814 p = xdr_inline_decode(xdr, 28);
5815 if (unlikely(!p))
5816 return -EIO;
5817 val = be32_to_cpup(p++); /* headerpadsz */
5818 if (val)
5819 return -EINVAL; /* no support for header padding yet */
5820 attrs->max_rqst_sz = be32_to_cpup(p++);
5821 attrs->max_resp_sz = be32_to_cpup(p++);
5822 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5823 attrs->max_ops = be32_to_cpup(p++);
5824 attrs->max_reqs = be32_to_cpup(p++);
5825 nr_attrs = be32_to_cpup(p);
5826 if (unlikely(nr_attrs > 1)) {
5827 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5828 "count %u\n", __func__, nr_attrs);
5829 return -EINVAL;
5830 }
5831 if (nr_attrs == 1) {
5832 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5833 if (unlikely(!p))
5834 return -EIO;
5835 }
5836 return 0;
5837 }
5838
5839 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5840 {
5841 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5842 }
5843
5844 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5845 struct nfs41_bind_conn_to_session_res *res)
5846 {
5847 __be32 *p;
5848 int status;
5849
5850 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5851 if (!status)
5852 status = decode_sessionid(xdr, &res->sessionid);
5853 if (unlikely(status))
5854 return status;
5855
5856 /* dir flags, rdma mode bool */
5857 p = xdr_inline_decode(xdr, 8);
5858 if (unlikely(!p))
5859 return -EIO;
5860
5861 res->dir = be32_to_cpup(p++);
5862 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5863 return -EIO;
5864 if (be32_to_cpup(p) == 0)
5865 res->use_conn_in_rdma_mode = false;
5866 else
5867 res->use_conn_in_rdma_mode = true;
5868
5869 return 0;
5870 }
5871
5872 static int decode_create_session(struct xdr_stream *xdr,
5873 struct nfs41_create_session_res *res)
5874 {
5875 __be32 *p;
5876 int status;
5877
5878 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5879 if (!status)
5880 status = decode_sessionid(xdr, &res->sessionid);
5881 if (unlikely(status))
5882 return status;
5883
5884 /* seqid, flags */
5885 p = xdr_inline_decode(xdr, 8);
5886 if (unlikely(!p))
5887 return -EIO;
5888 res->seqid = be32_to_cpup(p++);
5889 res->flags = be32_to_cpup(p);
5890
5891 /* Channel attributes */
5892 status = decode_chan_attrs(xdr, &res->fc_attrs);
5893 if (!status)
5894 status = decode_chan_attrs(xdr, &res->bc_attrs);
5895 return status;
5896 }
5897
5898 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5899 {
5900 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5901 }
5902
5903 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5904 {
5905 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5906 }
5907
5908 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5909 {
5910 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5911 }
5912 #endif /* CONFIG_NFS_V4_1 */
5913
5914 static int decode_sequence(struct xdr_stream *xdr,
5915 struct nfs4_sequence_res *res,
5916 struct rpc_rqst *rqstp)
5917 {
5918 #if defined(CONFIG_NFS_V4_1)
5919 struct nfs4_session *session;
5920 struct nfs4_sessionid id;
5921 u32 dummy;
5922 int status;
5923 __be32 *p;
5924
5925 if (res->sr_slot == NULL)
5926 return 0;
5927 if (!res->sr_slot->table->session)
5928 return 0;
5929
5930 status = decode_op_hdr(xdr, OP_SEQUENCE);
5931 if (!status)
5932 status = decode_sessionid(xdr, &id);
5933 if (unlikely(status))
5934 goto out_err;
5935
5936 /*
5937 * If the server returns different values for sessionID, slotID or
5938 * sequence number, the server is looney tunes.
5939 */
5940 status = -EREMOTEIO;
5941 session = res->sr_slot->table->session;
5942
5943 if (memcmp(id.data, session->sess_id.data,
5944 NFS4_MAX_SESSIONID_LEN)) {
5945 dprintk("%s Invalid session id\n", __func__);
5946 goto out_err;
5947 }
5948
5949 p = xdr_inline_decode(xdr, 20);
5950 if (unlikely(!p))
5951 goto out_overflow;
5952
5953 /* seqid */
5954 dummy = be32_to_cpup(p++);
5955 if (dummy != res->sr_slot->seq_nr) {
5956 dprintk("%s Invalid sequence number\n", __func__);
5957 goto out_err;
5958 }
5959 /* slot id */
5960 dummy = be32_to_cpup(p++);
5961 if (dummy != res->sr_slot->slot_nr) {
5962 dprintk("%s Invalid slot id\n", __func__);
5963 goto out_err;
5964 }
5965 /* highest slot id */
5966 res->sr_highest_slotid = be32_to_cpup(p++);
5967 /* target highest slot id */
5968 res->sr_target_highest_slotid = be32_to_cpup(p++);
5969 /* result flags */
5970 res->sr_status_flags = be32_to_cpup(p);
5971 status = 0;
5972 out_err:
5973 res->sr_status = status;
5974 return status;
5975 out_overflow:
5976 status = -EIO;
5977 goto out_err;
5978 #else /* CONFIG_NFS_V4_1 */
5979 return 0;
5980 #endif /* CONFIG_NFS_V4_1 */
5981 }
5982
5983 #if defined(CONFIG_NFS_V4_1)
5984 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5985 {
5986 stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5987 return decode_stateid(xdr, stateid);
5988 }
5989
5990 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5991 struct nfs4_getdeviceinfo_res *res)
5992 {
5993 struct pnfs_device *pdev = res->pdev;
5994 __be32 *p;
5995 uint32_t len, type;
5996 int status;
5997
5998 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5999 if (status) {
6000 if (status == -ETOOSMALL) {
6001 p = xdr_inline_decode(xdr, 4);
6002 if (unlikely(!p))
6003 return -EIO;
6004 pdev->mincount = be32_to_cpup(p);
6005 dprintk("%s: Min count too small. mincnt = %u\n",
6006 __func__, pdev->mincount);
6007 }
6008 return status;
6009 }
6010
6011 p = xdr_inline_decode(xdr, 8);
6012 if (unlikely(!p))
6013 return -EIO;
6014 type = be32_to_cpup(p++);
6015 if (type != pdev->layout_type) {
6016 dprintk("%s: layout mismatch req: %u pdev: %u\n",
6017 __func__, pdev->layout_type, type);
6018 return -EINVAL;
6019 }
6020 /*
6021 * Get the length of the opaque device_addr4. xdr_read_pages places
6022 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
6023 * and places the remaining xdr data in xdr_buf->tail
6024 */
6025 pdev->mincount = be32_to_cpup(p);
6026 if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
6027 return -EIO;
6028
6029 /* Parse notification bitmap, verifying that it is zero. */
6030 p = xdr_inline_decode(xdr, 4);
6031 if (unlikely(!p))
6032 return -EIO;
6033 len = be32_to_cpup(p);
6034 if (len) {
6035 uint32_t i;
6036
6037 p = xdr_inline_decode(xdr, 4 * len);
6038 if (unlikely(!p))
6039 return -EIO;
6040
6041 res->notification = be32_to_cpup(p++);
6042 for (i = 1; i < len; i++) {
6043 if (be32_to_cpup(p++)) {
6044 dprintk("%s: unsupported notification\n",
6045 __func__);
6046 return -EIO;
6047 }
6048 }
6049 }
6050 return 0;
6051 }
6052
6053 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6054 struct nfs4_layoutget_res *res)
6055 {
6056 __be32 *p;
6057 int status;
6058 u32 layout_count;
6059 u32 recvd;
6060
6061 status = decode_op_hdr(xdr, OP_LAYOUTGET);
6062 if (status)
6063 goto out;
6064 p = xdr_inline_decode(xdr, 4);
6065 if (unlikely(!p))
6066 goto out_overflow;
6067 res->return_on_close = be32_to_cpup(p);
6068 decode_layout_stateid(xdr, &res->stateid);
6069 p = xdr_inline_decode(xdr, 4);
6070 if (unlikely(!p))
6071 goto out_overflow;
6072 layout_count = be32_to_cpup(p);
6073 if (!layout_count) {
6074 dprintk("%s: server responded with empty layout array\n",
6075 __func__);
6076 status = -EINVAL;
6077 goto out;
6078 }
6079
6080 p = xdr_inline_decode(xdr, 28);
6081 if (unlikely(!p))
6082 goto out_overflow;
6083 p = xdr_decode_hyper(p, &res->range.offset);
6084 p = xdr_decode_hyper(p, &res->range.length);
6085 res->range.iomode = be32_to_cpup(p++);
6086 res->type = be32_to_cpup(p++);
6087 res->layoutp->len = be32_to_cpup(p);
6088
6089 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
6090 __func__,
6091 (unsigned long)res->range.offset,
6092 (unsigned long)res->range.length,
6093 res->range.iomode,
6094 res->type,
6095 res->layoutp->len);
6096
6097 recvd = xdr_read_pages(xdr, res->layoutp->len);
6098 if (res->layoutp->len > recvd) {
6099 dprintk("NFS: server cheating in layoutget reply: "
6100 "layout len %u > recvd %u\n",
6101 res->layoutp->len, recvd);
6102 status = -EINVAL;
6103 goto out;
6104 }
6105
6106 if (layout_count > 1) {
6107 /* We only handle a length one array at the moment. Any
6108 * further entries are just ignored. Note that this means
6109 * the client may see a response that is less than the
6110 * minimum it requested.
6111 */
6112 dprintk("%s: server responded with %d layouts, dropping tail\n",
6113 __func__, layout_count);
6114 }
6115
6116 out:
6117 res->status = status;
6118 return status;
6119 out_overflow:
6120 status = -EIO;
6121 goto out;
6122 }
6123
6124 static int decode_layoutreturn(struct xdr_stream *xdr,
6125 struct nfs4_layoutreturn_res *res)
6126 {
6127 __be32 *p;
6128 int status;
6129
6130 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6131 if (status)
6132 return status;
6133 p = xdr_inline_decode(xdr, 4);
6134 if (unlikely(!p))
6135 return -EIO;
6136 res->lrs_present = be32_to_cpup(p);
6137 if (res->lrs_present)
6138 status = decode_layout_stateid(xdr, &res->stateid);
6139 else
6140 nfs4_stateid_copy(&res->stateid, &invalid_stateid);
6141 return status;
6142 }
6143
6144 static int decode_layoutcommit(struct xdr_stream *xdr,
6145 struct rpc_rqst *req,
6146 struct nfs4_layoutcommit_res *res)
6147 {
6148 __be32 *p;
6149 __u32 sizechanged;
6150 int status;
6151
6152 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6153 res->status = status;
6154 if (status)
6155 return status;
6156
6157 p = xdr_inline_decode(xdr, 4);
6158 if (unlikely(!p))
6159 return -EIO;
6160 sizechanged = be32_to_cpup(p);
6161
6162 if (sizechanged) {
6163 /* throw away new size */
6164 p = xdr_inline_decode(xdr, 8);
6165 if (unlikely(!p))
6166 return -EIO;
6167 }
6168 return 0;
6169 }
6170
6171 static int decode_test_stateid(struct xdr_stream *xdr,
6172 struct nfs41_test_stateid_res *res)
6173 {
6174 __be32 *p;
6175 int status;
6176 int num_res;
6177
6178 status = decode_op_hdr(xdr, OP_TEST_STATEID);
6179 if (status)
6180 return status;
6181
6182 p = xdr_inline_decode(xdr, 4);
6183 if (unlikely(!p))
6184 return -EIO;
6185 num_res = be32_to_cpup(p++);
6186 if (num_res != 1)
6187 return -EIO;
6188
6189 p = xdr_inline_decode(xdr, 4);
6190 if (unlikely(!p))
6191 return -EIO;
6192 res->status = be32_to_cpup(p++);
6193
6194 return status;
6195 }
6196
6197 static int decode_free_stateid(struct xdr_stream *xdr,
6198 struct nfs41_free_stateid_res *res)
6199 {
6200 res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6201 return res->status;
6202 }
6203 #else
6204 static inline
6205 int decode_layoutreturn(struct xdr_stream *xdr,
6206 struct nfs4_layoutreturn_res *res)
6207 {
6208 return 0;
6209 }
6210
6211 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6212 struct nfs4_layoutget_res *res)
6213 {
6214 return 0;
6215 }
6216
6217 #endif /* CONFIG_NFS_V4_1 */
6218
6219 /*
6220 * END OF "GENERIC" DECODE ROUTINES.
6221 */
6222
6223 /*
6224 * Decode OPEN_DOWNGRADE response
6225 */
6226 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6227 struct xdr_stream *xdr,
6228 void *data)
6229 {
6230 struct nfs_closeres *res = data;
6231 struct compound_hdr hdr;
6232 int status;
6233
6234 status = decode_compound_hdr(xdr, &hdr);
6235 if (status)
6236 goto out;
6237 status = decode_sequence(xdr, &res->seq_res, rqstp);
6238 if (status)
6239 goto out;
6240 status = decode_putfh(xdr);
6241 if (status)
6242 goto out;
6243 if (res->lr_res) {
6244 status = decode_layoutreturn(xdr, res->lr_res);
6245 res->lr_ret = status;
6246 if (status)
6247 goto out;
6248 }
6249 status = decode_open_downgrade(xdr, res);
6250 out:
6251 return status;
6252 }
6253
6254 /*
6255 * Decode ACCESS response
6256 */
6257 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6258 void *data)
6259 {
6260 struct nfs4_accessres *res = data;
6261 struct compound_hdr hdr;
6262 int status;
6263
6264 status = decode_compound_hdr(xdr, &hdr);
6265 if (status)
6266 goto out;
6267 status = decode_sequence(xdr, &res->seq_res, rqstp);
6268 if (status)
6269 goto out;
6270 status = decode_putfh(xdr);
6271 if (status != 0)
6272 goto out;
6273 status = decode_access(xdr, &res->supported, &res->access);
6274 if (status != 0)
6275 goto out;
6276 if (res->fattr)
6277 decode_getfattr(xdr, res->fattr, res->server);
6278 out:
6279 return status;
6280 }
6281
6282 /*
6283 * Decode LOOKUP response
6284 */
6285 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6286 void *data)
6287 {
6288 struct nfs4_lookup_res *res = data;
6289 struct compound_hdr hdr;
6290 int status;
6291
6292 status = decode_compound_hdr(xdr, &hdr);
6293 if (status)
6294 goto out;
6295 status = decode_sequence(xdr, &res->seq_res, rqstp);
6296 if (status)
6297 goto out;
6298 status = decode_putfh(xdr);
6299 if (status)
6300 goto out;
6301 status = decode_lookup(xdr);
6302 if (status)
6303 goto out;
6304 status = decode_getfh(xdr, res->fh);
6305 if (status)
6306 goto out;
6307 status = decode_getfattr(xdr, res->fattr, res->server);
6308 out:
6309 return status;
6310 }
6311
6312 /*
6313 * Decode LOOKUPP response
6314 */
6315 static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6316 void *data)
6317 {
6318 struct nfs4_lookupp_res *res = data;
6319 struct compound_hdr hdr;
6320 int status;
6321
6322 status = decode_compound_hdr(xdr, &hdr);
6323 if (status)
6324 goto out;
6325 status = decode_sequence(xdr, &res->seq_res, rqstp);
6326 if (status)
6327 goto out;
6328 status = decode_putfh(xdr);
6329 if (status)
6330 goto out;
6331 status = decode_lookupp(xdr);
6332 if (status)
6333 goto out;
6334 status = decode_getfh(xdr, res->fh);
6335 if (status)
6336 goto out;
6337 status = decode_getfattr(xdr, res->fattr, res->server);
6338 out:
6339 return status;
6340 }
6341
6342 /*
6343 * Decode LOOKUP_ROOT response
6344 */
6345 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6346 struct xdr_stream *xdr,
6347 void *data)
6348 {
6349 struct nfs4_lookup_res *res = data;
6350 struct compound_hdr hdr;
6351 int status;
6352
6353 status = decode_compound_hdr(xdr, &hdr);
6354 if (status)
6355 goto out;
6356 status = decode_sequence(xdr, &res->seq_res, rqstp);
6357 if (status)
6358 goto out;
6359 status = decode_putrootfh(xdr);
6360 if (status)
6361 goto out;
6362 status = decode_getfh(xdr, res->fh);
6363 if (status == 0)
6364 status = decode_getfattr(xdr, res->fattr, res->server);
6365 out:
6366 return status;
6367 }
6368
6369 /*
6370 * Decode REMOVE response
6371 */
6372 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6373 void *data)
6374 {
6375 struct nfs_removeres *res = data;
6376 struct compound_hdr hdr;
6377 int status;
6378
6379 status = decode_compound_hdr(xdr, &hdr);
6380 if (status)
6381 goto out;
6382 status = decode_sequence(xdr, &res->seq_res, rqstp);
6383 if (status)
6384 goto out;
6385 status = decode_putfh(xdr);
6386 if (status)
6387 goto out;
6388 status = decode_remove(xdr, &res->cinfo);
6389 out:
6390 return status;
6391 }
6392
6393 /*
6394 * Decode RENAME response
6395 */
6396 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6397 void *data)
6398 {
6399 struct nfs_renameres *res = data;
6400 struct compound_hdr hdr;
6401 int status;
6402
6403 status = decode_compound_hdr(xdr, &hdr);
6404 if (status)
6405 goto out;
6406 status = decode_sequence(xdr, &res->seq_res, rqstp);
6407 if (status)
6408 goto out;
6409 status = decode_putfh(xdr);
6410 if (status)
6411 goto out;
6412 status = decode_savefh(xdr);
6413 if (status)
6414 goto out;
6415 status = decode_putfh(xdr);
6416 if (status)
6417 goto out;
6418 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6419 out:
6420 return status;
6421 }
6422
6423 /*
6424 * Decode LINK response
6425 */
6426 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6427 void *data)
6428 {
6429 struct nfs4_link_res *res = data;
6430 struct compound_hdr hdr;
6431 int status;
6432
6433 status = decode_compound_hdr(xdr, &hdr);
6434 if (status)
6435 goto out;
6436 status = decode_sequence(xdr, &res->seq_res, rqstp);
6437 if (status)
6438 goto out;
6439 status = decode_putfh(xdr);
6440 if (status)
6441 goto out;
6442 status = decode_savefh(xdr);
6443 if (status)
6444 goto out;
6445 status = decode_putfh(xdr);
6446 if (status)
6447 goto out;
6448 status = decode_link(xdr, &res->cinfo);
6449 if (status)
6450 goto out;
6451 /*
6452 * Note order: OP_LINK leaves the directory as the current
6453 * filehandle.
6454 */
6455 status = decode_restorefh(xdr);
6456 if (status)
6457 goto out;
6458 decode_getfattr(xdr, res->fattr, res->server);
6459 out:
6460 return status;
6461 }
6462
6463 /*
6464 * Decode CREATE response
6465 */
6466 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6467 void *data)
6468 {
6469 struct nfs4_create_res *res = data;
6470 struct compound_hdr hdr;
6471 int status;
6472
6473 status = decode_compound_hdr(xdr, &hdr);
6474 if (status)
6475 goto out;
6476 status = decode_sequence(xdr, &res->seq_res, rqstp);
6477 if (status)
6478 goto out;
6479 status = decode_putfh(xdr);
6480 if (status)
6481 goto out;
6482 status = decode_create(xdr, &res->dir_cinfo);
6483 if (status)
6484 goto out;
6485 status = decode_getfh(xdr, res->fh);
6486 if (status)
6487 goto out;
6488 decode_getfattr(xdr, res->fattr, res->server);
6489 out:
6490 return status;
6491 }
6492
6493 /*
6494 * Decode SYMLINK response
6495 */
6496 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6497 void *res)
6498 {
6499 return nfs4_xdr_dec_create(rqstp, xdr, res);
6500 }
6501
6502 /*
6503 * Decode GETATTR response
6504 */
6505 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6506 void *data)
6507 {
6508 struct nfs4_getattr_res *res = data;
6509 struct compound_hdr hdr;
6510 int status;
6511
6512 status = decode_compound_hdr(xdr, &hdr);
6513 if (status)
6514 goto out;
6515 status = decode_sequence(xdr, &res->seq_res, rqstp);
6516 if (status)
6517 goto out;
6518 status = decode_putfh(xdr);
6519 if (status)
6520 goto out;
6521 status = decode_getfattr(xdr, res->fattr, res->server);
6522 out:
6523 return status;
6524 }
6525
6526 /*
6527 * Encode an SETACL request
6528 */
6529 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6530 const void *data)
6531 {
6532 const struct nfs_setaclargs *args = data;
6533 struct compound_hdr hdr = {
6534 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6535 };
6536
6537 encode_compound_hdr(xdr, req, &hdr);
6538 encode_sequence(xdr, &args->seq_args, &hdr);
6539 encode_putfh(xdr, args->fh, &hdr);
6540 encode_setacl(xdr, args, &hdr);
6541 encode_nops(&hdr);
6542 }
6543
6544 /*
6545 * Decode SETACL response
6546 */
6547 static int
6548 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6549 void *data)
6550 {
6551 struct nfs_setaclres *res = data;
6552 struct compound_hdr hdr;
6553 int status;
6554
6555 status = decode_compound_hdr(xdr, &hdr);
6556 if (status)
6557 goto out;
6558 status = decode_sequence(xdr, &res->seq_res, rqstp);
6559 if (status)
6560 goto out;
6561 status = decode_putfh(xdr);
6562 if (status)
6563 goto out;
6564 status = decode_setattr(xdr);
6565 out:
6566 return status;
6567 }
6568
6569 /*
6570 * Decode GETACL response
6571 */
6572 static int
6573 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6574 void *data)
6575 {
6576 struct nfs_getaclres *res = data;
6577 struct compound_hdr hdr;
6578 int status;
6579
6580 if (res->acl_scratch != NULL)
6581 xdr_set_scratch_page(xdr, res->acl_scratch);
6582 status = decode_compound_hdr(xdr, &hdr);
6583 if (status)
6584 goto out;
6585 status = decode_sequence(xdr, &res->seq_res, rqstp);
6586 if (status)
6587 goto out;
6588 status = decode_putfh(xdr);
6589 if (status)
6590 goto out;
6591 status = decode_getacl(xdr, rqstp, res, res->acl_type);
6592
6593 out:
6594 return status;
6595 }
6596
6597 /*
6598 * Decode CLOSE response
6599 */
6600 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6601 void *data)
6602 {
6603 struct nfs_closeres *res = data;
6604 struct compound_hdr hdr;
6605 int status;
6606
6607 status = decode_compound_hdr(xdr, &hdr);
6608 if (status)
6609 goto out;
6610 status = decode_sequence(xdr, &res->seq_res, rqstp);
6611 if (status)
6612 goto out;
6613 status = decode_putfh(xdr);
6614 if (status)
6615 goto out;
6616 if (res->lr_res) {
6617 status = decode_layoutreturn(xdr, res->lr_res);
6618 res->lr_ret = status;
6619 if (status)
6620 goto out;
6621 }
6622 if (res->fattr != NULL) {
6623 status = decode_getfattr(xdr, res->fattr, res->server);
6624 if (status != 0)
6625 goto out;
6626 }
6627 status = decode_close(xdr, res);
6628 out:
6629 return status;
6630 }
6631
6632 /*
6633 * Decode OPEN response
6634 */
6635 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6636 void *data)
6637 {
6638 struct nfs_openres *res = data;
6639 struct compound_hdr hdr;
6640 int status;
6641
6642 status = decode_compound_hdr(xdr, &hdr);
6643 if (status)
6644 goto out;
6645 status = decode_sequence(xdr, &res->seq_res, rqstp);
6646 if (status)
6647 goto out;
6648 status = decode_putfh(xdr);
6649 if (status)
6650 goto out;
6651 status = decode_open(xdr, res);
6652 if (status)
6653 goto out;
6654 status = decode_getfh(xdr, &res->fh);
6655 if (status)
6656 goto out;
6657 if (res->access_request)
6658 decode_access(xdr, &res->access_supported, &res->access_result);
6659 decode_getfattr(xdr, res->f_attr, res->server);
6660 if (res->lg_res)
6661 decode_layoutget(xdr, rqstp, res->lg_res);
6662 out:
6663 return status;
6664 }
6665
6666 /*
6667 * Decode OPEN_CONFIRM response
6668 */
6669 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6670 struct xdr_stream *xdr,
6671 void *data)
6672 {
6673 struct nfs_open_confirmres *res = data;
6674 struct compound_hdr hdr;
6675 int status;
6676
6677 status = decode_compound_hdr(xdr, &hdr);
6678 if (status)
6679 goto out;
6680 status = decode_putfh(xdr);
6681 if (status)
6682 goto out;
6683 status = decode_open_confirm(xdr, res);
6684 out:
6685 return status;
6686 }
6687
6688 /*
6689 * Decode OPEN response
6690 */
6691 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6692 struct xdr_stream *xdr,
6693 void *data)
6694 {
6695 struct nfs_openres *res = data;
6696 struct compound_hdr hdr;
6697 int status;
6698
6699 status = decode_compound_hdr(xdr, &hdr);
6700 if (status)
6701 goto out;
6702 status = decode_sequence(xdr, &res->seq_res, rqstp);
6703 if (status)
6704 goto out;
6705 status = decode_putfh(xdr);
6706 if (status)
6707 goto out;
6708 status = decode_open(xdr, res);
6709 if (status)
6710 goto out;
6711 if (res->access_request)
6712 decode_access(xdr, &res->access_supported, &res->access_result);
6713 decode_getfattr(xdr, res->f_attr, res->server);
6714 if (res->lg_res)
6715 decode_layoutget(xdr, rqstp, res->lg_res);
6716 out:
6717 return status;
6718 }
6719
6720 /*
6721 * Decode SETATTR response
6722 */
6723 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6724 struct xdr_stream *xdr,
6725 void *data)
6726 {
6727 struct nfs_setattrres *res = data;
6728 struct compound_hdr hdr;
6729 int status;
6730
6731 status = decode_compound_hdr(xdr, &hdr);
6732 if (status)
6733 goto out;
6734 status = decode_sequence(xdr, &res->seq_res, rqstp);
6735 if (status)
6736 goto out;
6737 status = decode_putfh(xdr);
6738 if (status)
6739 goto out;
6740 status = decode_setattr(xdr);
6741 if (status)
6742 goto out;
6743 decode_getfattr(xdr, res->fattr, res->server);
6744 out:
6745 return status;
6746 }
6747
6748 /*
6749 * Decode LOCK response
6750 */
6751 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6752 void *data)
6753 {
6754 struct nfs_lock_res *res = data;
6755 struct compound_hdr hdr;
6756 int status;
6757
6758 status = decode_compound_hdr(xdr, &hdr);
6759 if (status)
6760 goto out;
6761 status = decode_sequence(xdr, &res->seq_res, rqstp);
6762 if (status)
6763 goto out;
6764 status = decode_putfh(xdr);
6765 if (status)
6766 goto out;
6767 status = decode_lock(xdr, res);
6768 out:
6769 return status;
6770 }
6771
6772 /*
6773 * Decode LOCKT response
6774 */
6775 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6776 void *data)
6777 {
6778 struct nfs_lockt_res *res = data;
6779 struct compound_hdr hdr;
6780 int status;
6781
6782 status = decode_compound_hdr(xdr, &hdr);
6783 if (status)
6784 goto out;
6785 status = decode_sequence(xdr, &res->seq_res, rqstp);
6786 if (status)
6787 goto out;
6788 status = decode_putfh(xdr);
6789 if (status)
6790 goto out;
6791 status = decode_lockt(xdr, res);
6792 out:
6793 return status;
6794 }
6795
6796 /*
6797 * Decode LOCKU response
6798 */
6799 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6800 void *data)
6801 {
6802 struct nfs_locku_res *res = data;
6803 struct compound_hdr hdr;
6804 int status;
6805
6806 status = decode_compound_hdr(xdr, &hdr);
6807 if (status)
6808 goto out;
6809 status = decode_sequence(xdr, &res->seq_res, rqstp);
6810 if (status)
6811 goto out;
6812 status = decode_putfh(xdr);
6813 if (status)
6814 goto out;
6815 status = decode_locku(xdr, res);
6816 out:
6817 return status;
6818 }
6819
6820 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6821 struct xdr_stream *xdr, void *dummy)
6822 {
6823 struct compound_hdr hdr;
6824 int status;
6825
6826 status = decode_compound_hdr(xdr, &hdr);
6827 if (!status)
6828 status = decode_release_lockowner(xdr);
6829 return status;
6830 }
6831
6832 /*
6833 * Decode READLINK response
6834 */
6835 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6836 struct xdr_stream *xdr,
6837 void *data)
6838 {
6839 struct nfs4_readlink_res *res = data;
6840 struct compound_hdr hdr;
6841 int status;
6842
6843 status = decode_compound_hdr(xdr, &hdr);
6844 if (status)
6845 goto out;
6846 status = decode_sequence(xdr, &res->seq_res, rqstp);
6847 if (status)
6848 goto out;
6849 status = decode_putfh(xdr);
6850 if (status)
6851 goto out;
6852 status = decode_readlink(xdr, rqstp);
6853 out:
6854 return status;
6855 }
6856
6857 /*
6858 * Decode READDIR response
6859 */
6860 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6861 void *data)
6862 {
6863 struct nfs4_readdir_res *res = data;
6864 struct compound_hdr hdr;
6865 int status;
6866
6867 status = decode_compound_hdr(xdr, &hdr);
6868 if (status)
6869 goto out;
6870 status = decode_sequence(xdr, &res->seq_res, rqstp);
6871 if (status)
6872 goto out;
6873 status = decode_putfh(xdr);
6874 if (status)
6875 goto out;
6876 status = decode_readdir(xdr, rqstp, res);
6877 out:
6878 return status;
6879 }
6880
6881 /*
6882 * Decode Read response
6883 */
6884 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6885 void *data)
6886 {
6887 struct nfs_pgio_res *res = data;
6888 struct compound_hdr hdr;
6889 int status;
6890
6891 status = decode_compound_hdr(xdr, &hdr);
6892 res->op_status = hdr.status;
6893 if (status)
6894 goto out;
6895 status = decode_sequence(xdr, &res->seq_res, rqstp);
6896 if (status)
6897 goto out;
6898 status = decode_putfh(xdr);
6899 if (status)
6900 goto out;
6901 status = decode_read(xdr, rqstp, res);
6902 if (!status)
6903 status = res->count;
6904 out:
6905 return status;
6906 }
6907
6908 /*
6909 * Decode WRITE response
6910 */
6911 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6912 void *data)
6913 {
6914 struct nfs_pgio_res *res = data;
6915 struct compound_hdr hdr;
6916 int status;
6917
6918 status = decode_compound_hdr(xdr, &hdr);
6919 res->op_status = hdr.status;
6920 if (status)
6921 goto out;
6922 status = decode_sequence(xdr, &res->seq_res, rqstp);
6923 if (status)
6924 goto out;
6925 status = decode_putfh(xdr);
6926 if (status)
6927 goto out;
6928 status = decode_write(xdr, res);
6929 if (status)
6930 goto out;
6931 if (res->fattr)
6932 decode_getfattr(xdr, res->fattr, res->server);
6933 if (!status)
6934 status = res->count;
6935 out:
6936 return status;
6937 }
6938
6939 /*
6940 * Decode COMMIT response
6941 */
6942 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6943 void *data)
6944 {
6945 struct nfs_commitres *res = data;
6946 struct compound_hdr hdr;
6947 int status;
6948
6949 status = decode_compound_hdr(xdr, &hdr);
6950 res->op_status = hdr.status;
6951 if (status)
6952 goto out;
6953 status = decode_sequence(xdr, &res->seq_res, rqstp);
6954 if (status)
6955 goto out;
6956 status = decode_putfh(xdr);
6957 if (status)
6958 goto out;
6959 status = decode_commit(xdr, res);
6960 out:
6961 return status;
6962 }
6963
6964 /*
6965 * Decode FSINFO response
6966 */
6967 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6968 void *data)
6969 {
6970 struct nfs4_fsinfo_res *res = data;
6971 struct compound_hdr hdr;
6972 int status;
6973
6974 status = decode_compound_hdr(xdr, &hdr);
6975 if (!status)
6976 status = decode_sequence(xdr, &res->seq_res, req);
6977 if (!status)
6978 status = decode_putfh(xdr);
6979 if (!status)
6980 status = decode_fsinfo(xdr, res->fsinfo);
6981 return status;
6982 }
6983
6984 /*
6985 * Decode PATHCONF response
6986 */
6987 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6988 void *data)
6989 {
6990 struct nfs4_pathconf_res *res = data;
6991 struct compound_hdr hdr;
6992 int status;
6993
6994 status = decode_compound_hdr(xdr, &hdr);
6995 if (!status)
6996 status = decode_sequence(xdr, &res->seq_res, req);
6997 if (!status)
6998 status = decode_putfh(xdr);
6999 if (!status)
7000 status = decode_pathconf(xdr, res->pathconf);
7001 return status;
7002 }
7003
7004 /*
7005 * Decode STATFS response
7006 */
7007 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
7008 void *data)
7009 {
7010 struct nfs4_statfs_res *res = data;
7011 struct compound_hdr hdr;
7012 int status;
7013
7014 status = decode_compound_hdr(xdr, &hdr);
7015 if (!status)
7016 status = decode_sequence(xdr, &res->seq_res, req);
7017 if (!status)
7018 status = decode_putfh(xdr);
7019 if (!status)
7020 status = decode_statfs(xdr, res->fsstat);
7021 return status;
7022 }
7023
7024 /*
7025 * Decode GETATTR_BITMAP response
7026 */
7027 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
7028 struct xdr_stream *xdr,
7029 void *data)
7030 {
7031 struct nfs4_server_caps_res *res = data;
7032 struct compound_hdr hdr;
7033 int status;
7034
7035 status = decode_compound_hdr(xdr, &hdr);
7036 if (status)
7037 goto out;
7038 status = decode_sequence(xdr, &res->seq_res, req);
7039 if (status)
7040 goto out;
7041 status = decode_putfh(xdr);
7042 if (status)
7043 goto out;
7044 status = decode_server_caps(xdr, res);
7045 out:
7046 return status;
7047 }
7048
7049 /*
7050 * Decode RENEW response
7051 */
7052 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
7053 void *__unused)
7054 {
7055 struct compound_hdr hdr;
7056 int status;
7057
7058 status = decode_compound_hdr(xdr, &hdr);
7059 if (!status)
7060 status = decode_renew(xdr);
7061 return status;
7062 }
7063
7064 /*
7065 * Decode SETCLIENTID response
7066 */
7067 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
7068 struct xdr_stream *xdr,
7069 void *data)
7070 {
7071 struct nfs4_setclientid_res *res = data;
7072 struct compound_hdr hdr;
7073 int status;
7074
7075 status = decode_compound_hdr(xdr, &hdr);
7076 if (!status)
7077 status = decode_setclientid(xdr, res);
7078 return status;
7079 }
7080
7081 /*
7082 * Decode SETCLIENTID_CONFIRM response
7083 */
7084 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
7085 struct xdr_stream *xdr,
7086 void *data)
7087 {
7088 struct compound_hdr hdr;
7089 int status;
7090
7091 status = decode_compound_hdr(xdr, &hdr);
7092 if (!status)
7093 status = decode_setclientid_confirm(xdr);
7094 return status;
7095 }
7096
7097 /*
7098 * Decode DELEGRETURN response
7099 */
7100 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
7101 struct xdr_stream *xdr,
7102 void *data)
7103 {
7104 struct nfs4_delegreturnres *res = data;
7105 struct compound_hdr hdr;
7106 int status;
7107
7108 status = decode_compound_hdr(xdr, &hdr);
7109 if (status)
7110 goto out;
7111 status = decode_sequence(xdr, &res->seq_res, rqstp);
7112 if (status)
7113 goto out;
7114 status = decode_putfh(xdr);
7115 if (status != 0)
7116 goto out;
7117 if (res->lr_res) {
7118 status = decode_layoutreturn(xdr, res->lr_res);
7119 res->lr_ret = status;
7120 if (status)
7121 goto out;
7122 }
7123 if (res->sattr_res) {
7124 status = decode_delegattr(xdr);
7125 res->sattr_ret = status;
7126 if (status)
7127 goto out;
7128 }
7129 if (res->fattr) {
7130 status = decode_getfattr(xdr, res->fattr, res->server);
7131 if (status != 0)
7132 goto out;
7133 }
7134 status = decode_delegreturn(xdr);
7135 out:
7136 return status;
7137 }
7138
7139 /*
7140 * Decode FS_LOCATIONS response
7141 */
7142 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
7143 struct xdr_stream *xdr,
7144 void *data)
7145 {
7146 struct nfs4_fs_locations_res *res = data;
7147 struct compound_hdr hdr;
7148 int status;
7149
7150 status = decode_compound_hdr(xdr, &hdr);
7151 if (status)
7152 goto out;
7153 status = decode_sequence(xdr, &res->seq_res, req);
7154 if (status)
7155 goto out;
7156 status = decode_putfh(xdr);
7157 if (status)
7158 goto out;
7159 if (res->migration) {
7160 xdr_enter_page(xdr, PAGE_SIZE);
7161 status = decode_getfattr_generic(xdr,
7162 res->fs_locations->fattr,
7163 NULL, res->fs_locations,
7164 res->fs_locations->server);
7165 if (status)
7166 goto out;
7167 if (res->renew)
7168 status = decode_renew(xdr);
7169 } else {
7170 status = decode_lookup(xdr);
7171 if (status)
7172 goto out;
7173 xdr_enter_page(xdr, PAGE_SIZE);
7174 status = decode_getfattr_generic(xdr,
7175 res->fs_locations->fattr,
7176 NULL, res->fs_locations,
7177 res->fs_locations->server);
7178 }
7179 out:
7180 return status;
7181 }
7182
7183 /*
7184 * Decode SECINFO response
7185 */
7186 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7187 struct xdr_stream *xdr,
7188 void *data)
7189 {
7190 struct nfs4_secinfo_res *res = data;
7191 struct compound_hdr hdr;
7192 int status;
7193
7194 status = decode_compound_hdr(xdr, &hdr);
7195 if (status)
7196 goto out;
7197 status = decode_sequence(xdr, &res->seq_res, rqstp);
7198 if (status)
7199 goto out;
7200 status = decode_putfh(xdr);
7201 if (status)
7202 goto out;
7203 status = decode_secinfo(xdr, res);
7204 out:
7205 return status;
7206 }
7207
7208 /*
7209 * Decode FSID_PRESENT response
7210 */
7211 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7212 struct xdr_stream *xdr,
7213 void *data)
7214 {
7215 struct nfs4_fsid_present_res *res = data;
7216 struct compound_hdr hdr;
7217 int status;
7218
7219 status = decode_compound_hdr(xdr, &hdr);
7220 if (status)
7221 goto out;
7222 status = decode_sequence(xdr, &res->seq_res, rqstp);
7223 if (status)
7224 goto out;
7225 status = decode_putfh(xdr);
7226 if (status)
7227 goto out;
7228 status = decode_getfh(xdr, res->fh);
7229 if (status)
7230 goto out;
7231 if (res->renew)
7232 status = decode_renew(xdr);
7233 out:
7234 return status;
7235 }
7236
7237 #if defined(CONFIG_NFS_V4_1)
7238 /*
7239 * Decode BIND_CONN_TO_SESSION response
7240 */
7241 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7242 struct xdr_stream *xdr,
7243 void *res)
7244 {
7245 struct compound_hdr hdr;
7246 int status;
7247
7248 status = decode_compound_hdr(xdr, &hdr);
7249 if (!status)
7250 status = decode_bind_conn_to_session(xdr, res);
7251 return status;
7252 }
7253
7254 /*
7255 * Decode EXCHANGE_ID response
7256 */
7257 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7258 struct xdr_stream *xdr,
7259 void *res)
7260 {
7261 struct compound_hdr hdr;
7262 int status;
7263
7264 status = decode_compound_hdr(xdr, &hdr);
7265 if (!status)
7266 status = decode_exchange_id(xdr, res);
7267 return status;
7268 }
7269
7270 /*
7271 * Decode CREATE_SESSION response
7272 */
7273 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7274 struct xdr_stream *xdr,
7275 void *res)
7276 {
7277 struct compound_hdr hdr;
7278 int status;
7279
7280 status = decode_compound_hdr(xdr, &hdr);
7281 if (!status)
7282 status = decode_create_session(xdr, res);
7283 return status;
7284 }
7285
7286 /*
7287 * Decode DESTROY_SESSION response
7288 */
7289 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7290 struct xdr_stream *xdr,
7291 void *res)
7292 {
7293 struct compound_hdr hdr;
7294 int status;
7295
7296 status = decode_compound_hdr(xdr, &hdr);
7297 if (!status)
7298 status = decode_destroy_session(xdr, res);
7299 return status;
7300 }
7301
7302 /*
7303 * Decode DESTROY_CLIENTID response
7304 */
7305 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7306 struct xdr_stream *xdr,
7307 void *res)
7308 {
7309 struct compound_hdr hdr;
7310 int status;
7311
7312 status = decode_compound_hdr(xdr, &hdr);
7313 if (!status)
7314 status = decode_destroy_clientid(xdr, res);
7315 return status;
7316 }
7317
7318 /*
7319 * Decode SEQUENCE response
7320 */
7321 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7322 struct xdr_stream *xdr,
7323 void *res)
7324 {
7325 struct compound_hdr hdr;
7326 int status;
7327
7328 status = decode_compound_hdr(xdr, &hdr);
7329 if (!status)
7330 status = decode_sequence(xdr, res, rqstp);
7331 return status;
7332 }
7333
7334 #endif
7335
7336 /*
7337 * Decode GET_LEASE_TIME response
7338 */
7339 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7340 struct xdr_stream *xdr,
7341 void *data)
7342 {
7343 struct nfs4_get_lease_time_res *res = data;
7344 struct compound_hdr hdr;
7345 int status;
7346
7347 status = decode_compound_hdr(xdr, &hdr);
7348 if (!status)
7349 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7350 if (!status)
7351 status = decode_putrootfh(xdr);
7352 if (!status)
7353 status = decode_fsinfo(xdr, res->lr_fsinfo);
7354 return status;
7355 }
7356
7357 #ifdef CONFIG_NFS_V4_1
7358
7359 /*
7360 * Decode RECLAIM_COMPLETE response
7361 */
7362 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7363 struct xdr_stream *xdr,
7364 void *data)
7365 {
7366 struct nfs41_reclaim_complete_res *res = data;
7367 struct compound_hdr hdr;
7368 int status;
7369
7370 status = decode_compound_hdr(xdr, &hdr);
7371 if (!status)
7372 status = decode_sequence(xdr, &res->seq_res, rqstp);
7373 if (!status)
7374 status = decode_reclaim_complete(xdr, NULL);
7375 return status;
7376 }
7377
7378 /*
7379 * Decode GETDEVINFO response
7380 */
7381 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7382 struct xdr_stream *xdr,
7383 void *data)
7384 {
7385 struct nfs4_getdeviceinfo_res *res = data;
7386 struct compound_hdr hdr;
7387 int status;
7388
7389 status = decode_compound_hdr(xdr, &hdr);
7390 if (status != 0)
7391 goto out;
7392 status = decode_sequence(xdr, &res->seq_res, rqstp);
7393 if (status != 0)
7394 goto out;
7395 status = decode_getdeviceinfo(xdr, res);
7396 out:
7397 return status;
7398 }
7399
7400 /*
7401 * Decode LAYOUTGET response
7402 */
7403 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7404 struct xdr_stream *xdr,
7405 void *data)
7406 {
7407 struct nfs4_layoutget_res *res = data;
7408 struct compound_hdr hdr;
7409 int status;
7410
7411 status = decode_compound_hdr(xdr, &hdr);
7412 if (status)
7413 goto out;
7414 status = decode_sequence(xdr, &res->seq_res, rqstp);
7415 if (status)
7416 goto out;
7417 status = decode_putfh(xdr);
7418 if (status)
7419 goto out;
7420 status = decode_layoutget(xdr, rqstp, res);
7421 out:
7422 return status;
7423 }
7424
7425 /*
7426 * Decode LAYOUTRETURN response
7427 */
7428 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7429 struct xdr_stream *xdr,
7430 void *data)
7431 {
7432 struct nfs4_layoutreturn_res *res = data;
7433 struct compound_hdr hdr;
7434 int status;
7435
7436 status = decode_compound_hdr(xdr, &hdr);
7437 if (status)
7438 goto out;
7439 status = decode_sequence(xdr, &res->seq_res, rqstp);
7440 if (status)
7441 goto out;
7442 status = decode_putfh(xdr);
7443 if (status)
7444 goto out;
7445 status = decode_layoutreturn(xdr, res);
7446 out:
7447 return status;
7448 }
7449
7450 /*
7451 * Decode LAYOUTCOMMIT response
7452 */
7453 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7454 struct xdr_stream *xdr,
7455 void *data)
7456 {
7457 struct nfs4_layoutcommit_res *res = data;
7458 struct compound_hdr hdr;
7459 int status;
7460
7461 status = decode_compound_hdr(xdr, &hdr);
7462 if (status)
7463 goto out;
7464 status = decode_sequence(xdr, &res->seq_res, rqstp);
7465 if (status)
7466 goto out;
7467 status = decode_putfh(xdr);
7468 if (status)
7469 goto out;
7470 status = decode_layoutcommit(xdr, rqstp, res);
7471 if (status)
7472 goto out;
7473 decode_getfattr(xdr, res->fattr, res->server);
7474 out:
7475 return status;
7476 }
7477
7478 /*
7479 * Decode SECINFO_NO_NAME response
7480 */
7481 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7482 struct xdr_stream *xdr,
7483 void *data)
7484 {
7485 struct nfs4_secinfo_res *res = data;
7486 struct compound_hdr hdr;
7487 int status;
7488
7489 status = decode_compound_hdr(xdr, &hdr);
7490 if (status)
7491 goto out;
7492 status = decode_sequence(xdr, &res->seq_res, rqstp);
7493 if (status)
7494 goto out;
7495 status = decode_putrootfh(xdr);
7496 if (status)
7497 goto out;
7498 status = decode_secinfo_no_name(xdr, res);
7499 out:
7500 return status;
7501 }
7502
7503 /*
7504 * Decode TEST_STATEID response
7505 */
7506 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7507 struct xdr_stream *xdr,
7508 void *data)
7509 {
7510 struct nfs41_test_stateid_res *res = data;
7511 struct compound_hdr hdr;
7512 int status;
7513
7514 status = decode_compound_hdr(xdr, &hdr);
7515 if (status)
7516 goto out;
7517 status = decode_sequence(xdr, &res->seq_res, rqstp);
7518 if (status)
7519 goto out;
7520 status = decode_test_stateid(xdr, res);
7521 out:
7522 return status;
7523 }
7524
7525 /*
7526 * Decode FREE_STATEID response
7527 */
7528 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7529 struct xdr_stream *xdr,
7530 void *data)
7531 {
7532 struct nfs41_free_stateid_res *res = data;
7533 struct compound_hdr hdr;
7534 int status;
7535
7536 status = decode_compound_hdr(xdr, &hdr);
7537 if (status)
7538 goto out;
7539 status = decode_sequence(xdr, &res->seq_res, rqstp);
7540 if (status)
7541 goto out;
7542 status = decode_free_stateid(xdr, res);
7543 out:
7544 return status;
7545 }
7546 #endif /* CONFIG_NFS_V4_1 */
7547
7548 /**
7549 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7550 * the local page cache.
7551 * @xdr: XDR stream where entry resides
7552 * @entry: buffer to fill in with entry data
7553 * @plus: boolean indicating whether this should be a readdirplus entry
7554 *
7555 * Returns zero if successful, otherwise a negative errno value is
7556 * returned.
7557 *
7558 * This function is not invoked during READDIR reply decoding, but
7559 * rather whenever an application invokes the getdents(2) system call
7560 * on a directory already in our cache.
7561 */
7562 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7563 bool plus)
7564 {
7565 unsigned int savep;
7566 uint32_t bitmap[3] = {0};
7567 uint32_t len;
7568 uint64_t new_cookie;
7569 __be32 *p = xdr_inline_decode(xdr, 4);
7570 if (unlikely(!p))
7571 return -EAGAIN;
7572 if (*p == xdr_zero) {
7573 p = xdr_inline_decode(xdr, 4);
7574 if (unlikely(!p))
7575 return -EAGAIN;
7576 if (*p == xdr_zero)
7577 return -EAGAIN;
7578 entry->eof = 1;
7579 return -EBADCOOKIE;
7580 }
7581
7582 p = xdr_inline_decode(xdr, 12);
7583 if (unlikely(!p))
7584 return -EAGAIN;
7585 p = xdr_decode_hyper(p, &new_cookie);
7586 entry->len = be32_to_cpup(p);
7587
7588 p = xdr_inline_decode(xdr, entry->len);
7589 if (unlikely(!p))
7590 return -EAGAIN;
7591 entry->name = (const char *) p;
7592
7593 /*
7594 * In case the server doesn't return an inode number,
7595 * we fake one here. (We don't use inode number 0,
7596 * since glibc seems to choke on it...)
7597 */
7598 entry->ino = 1;
7599 entry->fattr->valid = 0;
7600
7601 if (decode_attr_bitmap(xdr, bitmap) < 0)
7602 return -EAGAIN;
7603
7604 if (decode_attr_length(xdr, &len, &savep) < 0)
7605 return -EAGAIN;
7606
7607 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7608 NULL, entry->server) < 0)
7609 return -EAGAIN;
7610 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7611 entry->ino = entry->fattr->mounted_on_fileid;
7612 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7613 entry->ino = entry->fattr->fileid;
7614
7615 entry->d_type = DT_UNKNOWN;
7616 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7617 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7618
7619 entry->cookie = new_cookie;
7620
7621 return 0;
7622 }
7623
7624 /*
7625 * We need to translate between nfs status return values and
7626 * the local errno values which may not be the same.
7627 */
7628 static struct {
7629 int stat;
7630 int errno;
7631 } nfs_errtbl[] = {
7632 { NFS4_OK, 0 },
7633 { NFS4ERR_PERM, -EPERM },
7634 { NFS4ERR_NOENT, -ENOENT },
7635 { NFS4ERR_IO, -errno_NFSERR_IO},
7636 { NFS4ERR_NXIO, -ENXIO },
7637 { NFS4ERR_ACCESS, -EACCES },
7638 { NFS4ERR_EXIST, -EEXIST },
7639 { NFS4ERR_XDEV, -EXDEV },
7640 { NFS4ERR_NOTDIR, -ENOTDIR },
7641 { NFS4ERR_ISDIR, -EISDIR },
7642 { NFS4ERR_INVAL, -EINVAL },
7643 { NFS4ERR_FBIG, -EFBIG },
7644 { NFS4ERR_NOSPC, -ENOSPC },
7645 { NFS4ERR_ROFS, -EROFS },
7646 { NFS4ERR_MLINK, -EMLINK },
7647 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7648 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7649 { NFS4ERR_DQUOT, -EDQUOT },
7650 { NFS4ERR_STALE, -ESTALE },
7651 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7652 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7653 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7654 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7655 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7656 { NFS4ERR_BADTYPE, -EBADTYPE },
7657 { NFS4ERR_LOCKED, -EAGAIN },
7658 { NFS4ERR_SYMLINK, -ELOOP },
7659 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7660 { NFS4ERR_DEADLOCK, -EDEADLK },
7661 { NFS4ERR_NOXATTR, -ENODATA },
7662 { NFS4ERR_XATTR2BIG, -E2BIG },
7663 { -1, -EIO }
7664 };
7665
7666 /*
7667 * Convert an NFS error code to a local one.
7668 * This one is used jointly by NFSv2 and NFSv3.
7669 */
7670 static int
7671 nfs4_stat_to_errno(int stat)
7672 {
7673 int i;
7674 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7675 if (nfs_errtbl[i].stat == stat)
7676 return nfs_errtbl[i].errno;
7677 }
7678 if (stat <= 10000 || stat > 10100) {
7679 /* The server is looney tunes. */
7680 return -EREMOTEIO;
7681 }
7682 /* If we cannot translate the error, the recovery routines should
7683 * handle it.
7684 * Note: remaining NFSv4 error codes have values > 10000, so should
7685 * not conflict with native Linux error codes.
7686 */
7687 return -stat;
7688 }
7689
7690 #ifdef CONFIG_NFS_V4_2
7691 #include "nfs42xdr.c"
7692 #endif /* CONFIG_NFS_V4_2 */
7693
7694 #define PROC(proc, argtype, restype) \
7695 [NFSPROC4_CLNT_##proc] = { \
7696 .p_proc = NFSPROC4_COMPOUND, \
7697 .p_encode = nfs4_xdr_##argtype, \
7698 .p_decode = nfs4_xdr_##restype, \
7699 .p_arglen = NFS4_##argtype##_sz, \
7700 .p_replen = NFS4_##restype##_sz, \
7701 .p_statidx = NFSPROC4_CLNT_##proc, \
7702 .p_name = #proc, \
7703 }
7704
7705 #define STUB(proc) \
7706 [NFSPROC4_CLNT_##proc] = { \
7707 .p_name = #proc, \
7708 }
7709
7710 #if defined(CONFIG_NFS_V4_1)
7711 #define PROC41(proc, argtype, restype) \
7712 PROC(proc, argtype, restype)
7713 #else
7714 #define PROC41(proc, argtype, restype) \
7715 STUB(proc)
7716 #endif
7717
7718 #if defined(CONFIG_NFS_V4_2)
7719 #define PROC42(proc, argtype, restype) \
7720 PROC(proc, argtype, restype)
7721 #else
7722 #define PROC42(proc, argtype, restype) \
7723 STUB(proc)
7724 #endif
7725
7726 const struct rpc_procinfo nfs4_procedures[] = {
7727 PROC(READ, enc_read, dec_read),
7728 PROC(WRITE, enc_write, dec_write),
7729 PROC(COMMIT, enc_commit, dec_commit),
7730 PROC(OPEN, enc_open, dec_open),
7731 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7732 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7733 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7734 PROC(CLOSE, enc_close, dec_close),
7735 PROC(SETATTR, enc_setattr, dec_setattr),
7736 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7737 PROC(RENEW, enc_renew, dec_renew),
7738 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7739 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7740 PROC(LOCK, enc_lock, dec_lock),
7741 PROC(LOCKT, enc_lockt, dec_lockt),
7742 PROC(LOCKU, enc_locku, dec_locku),
7743 PROC(ACCESS, enc_access, dec_access),
7744 PROC(GETATTR, enc_getattr, dec_getattr),
7745 PROC(LOOKUP, enc_lookup, dec_lookup),
7746 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7747 PROC(REMOVE, enc_remove, dec_remove),
7748 PROC(RENAME, enc_rename, dec_rename),
7749 PROC(LINK, enc_link, dec_link),
7750 PROC(SYMLINK, enc_symlink, dec_symlink),
7751 PROC(CREATE, enc_create, dec_create),
7752 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7753 PROC(STATFS, enc_statfs, dec_statfs),
7754 PROC(READLINK, enc_readlink, dec_readlink),
7755 PROC(READDIR, enc_readdir, dec_readdir),
7756 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7757 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7758 PROC(GETACL, enc_getacl, dec_getacl),
7759 PROC(SETACL, enc_setacl, dec_setacl),
7760 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7761 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7762 PROC(SECINFO, enc_secinfo, dec_secinfo),
7763 PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present),
7764 PROC41(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7765 PROC41(CREATE_SESSION, enc_create_session, dec_create_session),
7766 PROC41(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7767 PROC41(SEQUENCE, enc_sequence, dec_sequence),
7768 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7769 PROC41(RECLAIM_COMPLETE,enc_reclaim_complete, dec_reclaim_complete),
7770 PROC41(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7771 PROC41(LAYOUTGET, enc_layoutget, dec_layoutget),
7772 PROC41(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7773 PROC41(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7774 PROC41(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7775 PROC41(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7776 PROC41(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7777 STUB(GETDEVICELIST),
7778 PROC41(BIND_CONN_TO_SESSION,
7779 enc_bind_conn_to_session, dec_bind_conn_to_session),
7780 PROC41(DESTROY_CLIENTID,enc_destroy_clientid, dec_destroy_clientid),
7781 PROC42(SEEK, enc_seek, dec_seek),
7782 PROC42(ALLOCATE, enc_allocate, dec_allocate),
7783 PROC42(DEALLOCATE, enc_deallocate, dec_deallocate),
7784 PROC42(LAYOUTSTATS, enc_layoutstats, dec_layoutstats),
7785 PROC42(CLONE, enc_clone, dec_clone),
7786 PROC42(COPY, enc_copy, dec_copy),
7787 PROC42(OFFLOAD_CANCEL, enc_offload_cancel, dec_offload_cancel),
7788 PROC42(COPY_NOTIFY, enc_copy_notify, dec_copy_notify),
7789 PROC(LOOKUPP, enc_lookupp, dec_lookupp),
7790 PROC42(LAYOUTERROR, enc_layouterror, dec_layouterror),
7791 PROC42(GETXATTR, enc_getxattr, dec_getxattr),
7792 PROC42(SETXATTR, enc_setxattr, dec_setxattr),
7793 PROC42(LISTXATTRS, enc_listxattrs, dec_listxattrs),
7794 PROC42(REMOVEXATTR, enc_removexattr, dec_removexattr),
7795 PROC42(READ_PLUS, enc_read_plus, dec_read_plus),
7796 };
7797
7798 static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7799 const struct rpc_version nfs_version4 = {
7800 .number = 4,
7801 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7802 .procs = nfs4_procedures,
7803 .counts = nfs_version4_counts,
7804 };
7805
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