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Linux 5.10.7
[linux/fpc-iii.git] / fs / nfs / nfs4xdr.c
blobc16b93df1bc14222d7dd4393704f7d090cbd6d74
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 open_owner_id_maxsz (1 + 2 + 1 + 1 + 2)
88 #define lock_owner_id_maxsz (1 + 1 + 4)
89 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
90 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
91 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
92 #define op_encode_hdr_maxsz (1)
93 #define op_decode_hdr_maxsz (2)
94 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
95 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
96 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
97 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
98 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
99 (NFS4_FHSIZE >> 2))
100 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
101 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
102 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
103 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
104 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
105 ((3+NFS4_FHSIZE) >> 2))
106 #define nfs4_fattr_bitmap_maxsz 4
107 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
108 #define nfstime4_maxsz (3)
109 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
110 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
111 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
112 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
113 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
114 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
115 #define nfs4_label_maxsz (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
116 #else
117 #define nfs4_label_maxsz 0
118 #endif
119 /* We support only one layout type per file system */
120 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
121 /* This is based on getfattr, which uses the most attributes: */
122 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
123 3*nfstime4_maxsz + \
124 nfs4_owner_maxsz + \
125 nfs4_group_maxsz + nfs4_label_maxsz + \
126 decode_mdsthreshold_maxsz))
127 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
128 nfs4_fattr_value_maxsz)
129 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
130 #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
131 1 + 2 + 1 + \
132 nfs4_owner_maxsz + \
133 nfs4_group_maxsz + \
134 nfs4_label_maxsz + \
135 1 + nfstime4_maxsz + \
136 1 + nfstime4_maxsz)
137 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
138 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
139 #define encode_restorefh_maxsz (op_encode_hdr_maxsz)
140 #define decode_restorefh_maxsz (op_decode_hdr_maxsz)
141 #define encode_fsinfo_maxsz (encode_getattr_maxsz)
142 /* The 5 accounts for the PNFS attributes, and assumes that at most three
143 * layout types will be returned.
144 */
145 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + \
146 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
147 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
148 #define decode_renew_maxsz (op_decode_hdr_maxsz)
149 #define encode_setclientid_maxsz \
150 (op_encode_hdr_maxsz + \
151 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
152 /* client name */ \
153 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
154 1 /* sc_prog */ + \
155 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
156 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
157 1) /* sc_cb_ident */
158 #define decode_setclientid_maxsz \
159 (op_decode_hdr_maxsz + \
160 2 /* clientid */ + \
161 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
162 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
163 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
164 #define encode_setclientid_confirm_maxsz \
165 (op_encode_hdr_maxsz + \
166 3 + (NFS4_VERIFIER_SIZE >> 2))
167 #define decode_setclientid_confirm_maxsz \
168 (op_decode_hdr_maxsz)
169 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
170 #define decode_lookup_maxsz (op_decode_hdr_maxsz)
171 #define encode_lookupp_maxsz (op_encode_hdr_maxsz)
172 #define decode_lookupp_maxsz (op_decode_hdr_maxsz)
173 #define encode_share_access_maxsz \
174 (2)
175 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
176 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
177 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
178 #define encode_open_maxsz (op_encode_hdr_maxsz + \
179 2 + encode_share_access_maxsz + 2 + \
180 open_owner_id_maxsz + \
181 encode_opentype_maxsz + \
182 encode_claim_null_maxsz)
183 #define decode_space_limit_maxsz (3)
184 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
185 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
186 decode_space_limit_maxsz + \
187 decode_ace_maxsz)
188 #define decode_change_info_maxsz (5)
189 #define decode_open_maxsz (op_decode_hdr_maxsz + \
190 decode_stateid_maxsz + \
191 decode_change_info_maxsz + 1 + \
192 nfs4_fattr_bitmap_maxsz + \
193 decode_delegation_maxsz)
194 #define encode_open_confirm_maxsz \
195 (op_encode_hdr_maxsz + \
196 encode_stateid_maxsz + 1)
197 #define decode_open_confirm_maxsz \
198 (op_decode_hdr_maxsz + \
199 decode_stateid_maxsz)
200 #define encode_open_downgrade_maxsz \
201 (op_encode_hdr_maxsz + \
202 encode_stateid_maxsz + 1 + \
203 encode_share_access_maxsz)
204 #define decode_open_downgrade_maxsz \
205 (op_decode_hdr_maxsz + \
206 decode_stateid_maxsz)
207 #define encode_close_maxsz (op_encode_hdr_maxsz + \
208 1 + encode_stateid_maxsz)
209 #define decode_close_maxsz (op_decode_hdr_maxsz + \
210 decode_stateid_maxsz)
211 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
212 encode_stateid_maxsz + \
213 encode_attrs_maxsz)
214 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
215 nfs4_fattr_bitmap_maxsz)
216 #define encode_read_maxsz (op_encode_hdr_maxsz + \
217 encode_stateid_maxsz + 3)
218 #define decode_read_maxsz (op_decode_hdr_maxsz + 2 + 1)
219 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
220 2 + encode_verifier_maxsz + 5 + \
221 nfs4_label_maxsz)
222 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
223 decode_verifier_maxsz + 1)
224 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
225 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1 + 1)
226 #define encode_write_maxsz (op_encode_hdr_maxsz + \
227 encode_stateid_maxsz + 4)
228 #define decode_write_maxsz (op_decode_hdr_maxsz + \
229 2 + decode_verifier_maxsz)
230 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
231 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
232 decode_verifier_maxsz)
233 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
234 nfs4_name_maxsz)
235 #define decode_remove_maxsz (op_decode_hdr_maxsz + \
236 decode_change_info_maxsz)
237 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
238 2 * nfs4_name_maxsz)
239 #define decode_rename_maxsz (op_decode_hdr_maxsz + \
240 decode_change_info_maxsz + \
241 decode_change_info_maxsz)
242 #define encode_link_maxsz (op_encode_hdr_maxsz + \
243 nfs4_name_maxsz)
244 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
245 #define encode_lockowner_maxsz (7)
246 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
247 7 + \
248 1 + encode_stateid_maxsz + 1 + \
249 encode_lockowner_maxsz)
250 #define decode_lock_denied_maxsz \
251 (8 + decode_lockowner_maxsz)
252 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
253 decode_lock_denied_maxsz)
254 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
255 encode_lockowner_maxsz)
256 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
257 decode_lock_denied_maxsz)
258 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
259 encode_stateid_maxsz + \
260 4)
261 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
262 decode_stateid_maxsz)
263 #define encode_release_lockowner_maxsz \
264 (op_encode_hdr_maxsz + \
265 encode_lockowner_maxsz)
266 #define decode_release_lockowner_maxsz \
267 (op_decode_hdr_maxsz)
268 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
269 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
270 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
271 1 + nfs4_name_maxsz + \
272 1 + \
273 nfs4_fattr_maxsz)
274 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
275 #define encode_create_maxsz (op_encode_hdr_maxsz + \
276 1 + 2 + nfs4_name_maxsz + \
277 encode_attrs_maxsz)
278 #define decode_create_maxsz (op_decode_hdr_maxsz + \
279 decode_change_info_maxsz + \
280 nfs4_fattr_bitmap_maxsz)
281 #define encode_statfs_maxsz (encode_getattr_maxsz)
282 #define decode_statfs_maxsz (decode_getattr_maxsz)
283 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
284 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
285 #define encode_getacl_maxsz (encode_getattr_maxsz)
286 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
287 nfs4_fattr_bitmap_maxsz + 1 + 1)
288 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
289 encode_stateid_maxsz + 3)
290 #define decode_setacl_maxsz (decode_setattr_maxsz)
291 #define encode_fs_locations_maxsz \
292 (encode_getattr_maxsz)
293 #define decode_fs_locations_maxsz \
294 (1)
295 #define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
296 #define decode_secinfo_maxsz (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
297
298 #if defined(CONFIG_NFS_V4_1)
299 #define NFS4_MAX_MACHINE_NAME_LEN (64)
300 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
301 sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
302
303 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
304 encode_verifier_maxsz + \
305 1 /* co_ownerid.len */ + \
306 /* eia_clientowner */ \
307 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
308 1 /* flags */ + \
309 1 /* spa_how */ + \
310 /* max is SP4_MACH_CRED (for now) */ + \
311 1 + NFS4_OP_MAP_NUM_WORDS + \
312 1 + NFS4_OP_MAP_NUM_WORDS + \
313 1 /* implementation id array of size 1 */ + \
314 1 /* nii_domain */ + \
315 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
316 1 /* nii_name */ + \
317 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
318 3 /* nii_date */)
319 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
320 2 /* eir_clientid */ + \
321 1 /* eir_sequenceid */ + \
322 1 /* eir_flags */ + \
323 1 /* spr_how */ + \
324 /* max is SP4_MACH_CRED (for now) */ + \
325 1 + NFS4_OP_MAP_NUM_WORDS + \
326 1 + NFS4_OP_MAP_NUM_WORDS + \
327 2 /* eir_server_owner.so_minor_id */ + \
328 /* eir_server_owner.so_major_id<> */ \
329 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
330 /* eir_server_scope<> */ \
331 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
332 1 /* eir_server_impl_id array length */ + \
333 1 /* nii_domain */ + \
334 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
335 1 /* nii_name */ + \
336 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
337 3 /* nii_date */)
338 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
339 #define decode_channel_attrs_maxsz (6 + \
340 1 /* ca_rdma_ird.len */ + \
341 1 /* ca_rdma_ird */)
342 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \
343 2 /* csa_clientid */ + \
344 1 /* csa_sequence */ + \
345 1 /* csa_flags */ + \
346 encode_channel_attrs_maxsz + \
347 encode_channel_attrs_maxsz + \
348 1 /* csa_cb_program */ + \
349 1 /* csa_sec_parms.len (1) */ + \
350 1 /* cb_secflavor (AUTH_SYS) */ + \
351 1 /* stamp */ + \
352 1 /* machinename.len */ + \
353 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
354 1 /* uid */ + \
355 1 /* gid */ + \
356 1 /* gids.len (0) */)
357 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \
358 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
359 1 /* csr_sequence */ + \
360 1 /* csr_flags */ + \
361 decode_channel_attrs_maxsz + \
362 decode_channel_attrs_maxsz)
363 #define encode_bind_conn_to_session_maxsz (op_encode_hdr_maxsz + \
364 /* bctsa_sessid */ \
365 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
366 1 /* bctsa_dir */ + \
367 1 /* bctsa_use_conn_in_rdma_mode */)
368 #define decode_bind_conn_to_session_maxsz (op_decode_hdr_maxsz + \
369 /* bctsr_sessid */ \
370 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
371 1 /* bctsr_dir */ + \
372 1 /* bctsr_use_conn_in_rdma_mode */)
373 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
374 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
375 #define encode_destroy_clientid_maxsz (op_encode_hdr_maxsz + 2)
376 #define decode_destroy_clientid_maxsz (op_decode_hdr_maxsz)
377 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \
378 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
379 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \
380 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
381 #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
382 #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
383 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
384 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
385 1 /* layout type */ + \
386 1 /* maxcount */ + \
387 1 /* bitmap size */ + \
388 1 /* notification bitmap length */ + \
389 1 /* notification bitmap, word 0 */)
390 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
391 1 /* layout type */ + \
392 1 /* opaque devaddr4 length */ + \
393 /* devaddr4 payload is read into page */ \
394 1 /* notification bitmap length */ + \
395 1 /* notification bitmap, word 0 */ + \
396 1 /* possible XDR padding */)
397 #define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
398 encode_stateid_maxsz)
399 #define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
400 decode_stateid_maxsz + \
401 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE) + 1)
402 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
403 2 /* offset */ + \
404 2 /* length */ + \
405 1 /* reclaim */ + \
406 encode_stateid_maxsz + \
407 1 /* new offset (true) */ + \
408 2 /* last byte written */ + \
409 1 /* nt_timechanged (false) */ + \
410 1 /* layoutupdate4 layout type */ + \
411 1 /* layoutupdate4 opaqueue len */)
412 /* the actual content of layoutupdate4 should
413 be allocated by drivers and spliced in
414 using xdr_write_pages */
415 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
416 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
417 encode_stateid_maxsz + \
418 1 + \
419 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
420 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
421 1 + decode_stateid_maxsz)
422 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
423 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
424 #define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \
425 XDR_QUADLEN(NFS4_STATEID_SIZE))
426 #define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1)
427 #define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \
428 XDR_QUADLEN(NFS4_STATEID_SIZE))
429 #define decode_free_stateid_maxsz (op_decode_hdr_maxsz)
430 #else /* CONFIG_NFS_V4_1 */
431 #define encode_sequence_maxsz 0
432 #define decode_sequence_maxsz 0
433 #define encode_layoutreturn_maxsz 0
434 #define decode_layoutreturn_maxsz 0
435 #define encode_layoutget_maxsz 0
436 #define decode_layoutget_maxsz 0
437 #endif /* CONFIG_NFS_V4_1 */
438
439 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
440 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
441 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
442 encode_sequence_maxsz + \
443 encode_putfh_maxsz + \
444 encode_read_maxsz)
445 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
446 decode_sequence_maxsz + \
447 decode_putfh_maxsz + \
448 decode_read_maxsz)
449 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
450 encode_sequence_maxsz + \
451 encode_putfh_maxsz + \
452 encode_readlink_maxsz)
453 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
454 decode_sequence_maxsz + \
455 decode_putfh_maxsz + \
456 decode_readlink_maxsz)
457 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
458 encode_sequence_maxsz + \
459 encode_putfh_maxsz + \
460 encode_readdir_maxsz)
461 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
462 decode_sequence_maxsz + \
463 decode_putfh_maxsz + \
464 decode_readdir_maxsz)
465 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
466 encode_sequence_maxsz + \
467 encode_putfh_maxsz + \
468 encode_write_maxsz + \
469 encode_getattr_maxsz)
470 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
471 decode_sequence_maxsz + \
472 decode_putfh_maxsz + \
473 decode_write_maxsz + \
474 decode_getattr_maxsz)
475 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
476 encode_sequence_maxsz + \
477 encode_putfh_maxsz + \
478 encode_commit_maxsz)
479 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
480 decode_sequence_maxsz + \
481 decode_putfh_maxsz + \
482 decode_commit_maxsz)
483 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
484 encode_sequence_maxsz + \
485 encode_putfh_maxsz + \
486 encode_open_maxsz + \
487 encode_access_maxsz + \
488 encode_getfh_maxsz + \
489 encode_getattr_maxsz + \
490 encode_layoutget_maxsz)
491 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
492 decode_sequence_maxsz + \
493 decode_putfh_maxsz + \
494 decode_open_maxsz + \
495 decode_access_maxsz + \
496 decode_getfh_maxsz + \
497 decode_getattr_maxsz + \
498 decode_layoutget_maxsz)
499 #define NFS4_enc_open_confirm_sz \
500 (compound_encode_hdr_maxsz + \
501 encode_putfh_maxsz + \
502 encode_open_confirm_maxsz)
503 #define NFS4_dec_open_confirm_sz \
504 (compound_decode_hdr_maxsz + \
505 decode_putfh_maxsz + \
506 decode_open_confirm_maxsz)
507 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
508 encode_sequence_maxsz + \
509 encode_putfh_maxsz + \
510 encode_open_maxsz + \
511 encode_access_maxsz + \
512 encode_getattr_maxsz + \
513 encode_layoutget_maxsz)
514 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
515 decode_sequence_maxsz + \
516 decode_putfh_maxsz + \
517 decode_open_maxsz + \
518 decode_access_maxsz + \
519 decode_getattr_maxsz + \
520 decode_layoutget_maxsz)
521 #define NFS4_enc_open_downgrade_sz \
522 (compound_encode_hdr_maxsz + \
523 encode_sequence_maxsz + \
524 encode_putfh_maxsz + \
525 encode_layoutreturn_maxsz + \
526 encode_open_downgrade_maxsz)
527 #define NFS4_dec_open_downgrade_sz \
528 (compound_decode_hdr_maxsz + \
529 decode_sequence_maxsz + \
530 decode_putfh_maxsz + \
531 decode_layoutreturn_maxsz + \
532 decode_open_downgrade_maxsz)
533 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
534 encode_sequence_maxsz + \
535 encode_putfh_maxsz + \
536 encode_layoutreturn_maxsz + \
537 encode_close_maxsz + \
538 encode_getattr_maxsz)
539 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
540 decode_sequence_maxsz + \
541 decode_putfh_maxsz + \
542 decode_layoutreturn_maxsz + \
543 decode_close_maxsz + \
544 decode_getattr_maxsz)
545 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
546 encode_sequence_maxsz + \
547 encode_putfh_maxsz + \
548 encode_setattr_maxsz + \
549 encode_getattr_maxsz)
550 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
551 decode_sequence_maxsz + \
552 decode_putfh_maxsz + \
553 decode_setattr_maxsz + \
554 decode_getattr_maxsz)
555 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
556 encode_sequence_maxsz + \
557 encode_putfh_maxsz + \
558 encode_fsinfo_maxsz)
559 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
560 decode_sequence_maxsz + \
561 decode_putfh_maxsz + \
562 decode_fsinfo_maxsz)
563 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
564 encode_renew_maxsz)
565 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
566 decode_renew_maxsz)
567 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
568 encode_setclientid_maxsz)
569 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
570 decode_setclientid_maxsz)
571 #define NFS4_enc_setclientid_confirm_sz \
572 (compound_encode_hdr_maxsz + \
573 encode_setclientid_confirm_maxsz)
574 #define NFS4_dec_setclientid_confirm_sz \
575 (compound_decode_hdr_maxsz + \
576 decode_setclientid_confirm_maxsz)
577 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
578 encode_sequence_maxsz + \
579 encode_putfh_maxsz + \
580 encode_lock_maxsz)
581 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
582 decode_sequence_maxsz + \
583 decode_putfh_maxsz + \
584 decode_lock_maxsz)
585 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
586 encode_sequence_maxsz + \
587 encode_putfh_maxsz + \
588 encode_lockt_maxsz)
589 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
590 decode_sequence_maxsz + \
591 decode_putfh_maxsz + \
592 decode_lockt_maxsz)
593 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
594 encode_sequence_maxsz + \
595 encode_putfh_maxsz + \
596 encode_locku_maxsz)
597 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
598 decode_sequence_maxsz + \
599 decode_putfh_maxsz + \
600 decode_locku_maxsz)
601 #define NFS4_enc_release_lockowner_sz \
602 (compound_encode_hdr_maxsz + \
603 encode_lockowner_maxsz)
604 #define NFS4_dec_release_lockowner_sz \
605 (compound_decode_hdr_maxsz + \
606 decode_lockowner_maxsz)
607 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
608 encode_sequence_maxsz + \
609 encode_putfh_maxsz + \
610 encode_access_maxsz + \
611 encode_getattr_maxsz)
612 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
613 decode_sequence_maxsz + \
614 decode_putfh_maxsz + \
615 decode_access_maxsz + \
616 decode_getattr_maxsz)
617 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
618 encode_sequence_maxsz + \
619 encode_putfh_maxsz + \
620 encode_getattr_maxsz + \
621 encode_renew_maxsz)
622 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
623 decode_sequence_maxsz + \
624 decode_putfh_maxsz + \
625 decode_getattr_maxsz + \
626 decode_renew_maxsz)
627 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
628 encode_sequence_maxsz + \
629 encode_putfh_maxsz + \
630 encode_lookup_maxsz + \
631 encode_getattr_maxsz + \
632 encode_getfh_maxsz)
633 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
634 decode_sequence_maxsz + \
635 decode_putfh_maxsz + \
636 decode_lookup_maxsz + \
637 decode_getattr_maxsz + \
638 decode_getfh_maxsz)
639 #define NFS4_enc_lookupp_sz (compound_encode_hdr_maxsz + \
640 encode_sequence_maxsz + \
641 encode_putfh_maxsz + \
642 encode_lookupp_maxsz + \
643 encode_getattr_maxsz + \
644 encode_getfh_maxsz)
645 #define NFS4_dec_lookupp_sz (compound_decode_hdr_maxsz + \
646 decode_sequence_maxsz + \
647 decode_putfh_maxsz + \
648 decode_lookupp_maxsz + \
649 decode_getattr_maxsz + \
650 decode_getfh_maxsz)
651 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
652 encode_sequence_maxsz + \
653 encode_putrootfh_maxsz + \
654 encode_getattr_maxsz + \
655 encode_getfh_maxsz)
656 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
657 decode_sequence_maxsz + \
658 decode_putrootfh_maxsz + \
659 decode_getattr_maxsz + \
660 decode_getfh_maxsz)
661 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
662 encode_sequence_maxsz + \
663 encode_putfh_maxsz + \
664 encode_remove_maxsz)
665 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
666 decode_sequence_maxsz + \
667 decode_putfh_maxsz + \
668 decode_remove_maxsz)
669 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
670 encode_sequence_maxsz + \
671 encode_putfh_maxsz + \
672 encode_savefh_maxsz + \
673 encode_putfh_maxsz + \
674 encode_rename_maxsz)
675 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
676 decode_sequence_maxsz + \
677 decode_putfh_maxsz + \
678 decode_savefh_maxsz + \
679 decode_putfh_maxsz + \
680 decode_rename_maxsz)
681 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
682 encode_sequence_maxsz + \
683 encode_putfh_maxsz + \
684 encode_savefh_maxsz + \
685 encode_putfh_maxsz + \
686 encode_link_maxsz + \
687 encode_restorefh_maxsz + \
688 encode_getattr_maxsz)
689 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
690 decode_sequence_maxsz + \
691 decode_putfh_maxsz + \
692 decode_savefh_maxsz + \
693 decode_putfh_maxsz + \
694 decode_link_maxsz + \
695 decode_restorefh_maxsz + \
696 decode_getattr_maxsz)
697 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
698 encode_sequence_maxsz + \
699 encode_putfh_maxsz + \
700 encode_symlink_maxsz + \
701 encode_getattr_maxsz + \
702 encode_getfh_maxsz)
703 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
704 decode_sequence_maxsz + \
705 decode_putfh_maxsz + \
706 decode_symlink_maxsz + \
707 decode_getattr_maxsz + \
708 decode_getfh_maxsz)
709 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
710 encode_sequence_maxsz + \
711 encode_putfh_maxsz + \
712 encode_create_maxsz + \
713 encode_getfh_maxsz + \
714 encode_getattr_maxsz)
715 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
716 decode_sequence_maxsz + \
717 decode_putfh_maxsz + \
718 decode_create_maxsz + \
719 decode_getfh_maxsz + \
720 decode_getattr_maxsz)
721 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
722 encode_sequence_maxsz + \
723 encode_putfh_maxsz + \
724 encode_getattr_maxsz)
725 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
726 decode_sequence_maxsz + \
727 decode_putfh_maxsz + \
728 decode_getattr_maxsz)
729 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
730 encode_sequence_maxsz + \
731 encode_putfh_maxsz + \
732 encode_statfs_maxsz)
733 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
734 decode_sequence_maxsz + \
735 decode_putfh_maxsz + \
736 decode_statfs_maxsz)
737 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
738 encode_sequence_maxsz + \
739 encode_putfh_maxsz + \
740 encode_getattr_maxsz)
741 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
742 decode_sequence_maxsz + \
743 decode_putfh_maxsz + \
744 decode_getattr_maxsz)
745 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
746 encode_sequence_maxsz + \
747 encode_putfh_maxsz + \
748 encode_layoutreturn_maxsz + \
749 encode_delegreturn_maxsz + \
750 encode_getattr_maxsz)
751 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
752 decode_sequence_maxsz + \
753 decode_putfh_maxsz + \
754 decode_layoutreturn_maxsz + \
755 decode_delegreturn_maxsz + \
756 decode_getattr_maxsz)
757 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
758 encode_sequence_maxsz + \
759 encode_putfh_maxsz + \
760 encode_getacl_maxsz)
761 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
762 decode_sequence_maxsz + \
763 decode_putfh_maxsz + \
764 decode_getacl_maxsz)
765 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
766 encode_sequence_maxsz + \
767 encode_putfh_maxsz + \
768 encode_setacl_maxsz)
769 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
770 decode_sequence_maxsz + \
771 decode_putfh_maxsz + \
772 decode_setacl_maxsz)
773 #define NFS4_enc_fs_locations_sz \
774 (compound_encode_hdr_maxsz + \
775 encode_sequence_maxsz + \
776 encode_putfh_maxsz + \
777 encode_lookup_maxsz + \
778 encode_fs_locations_maxsz + \
779 encode_renew_maxsz)
780 #define NFS4_dec_fs_locations_sz \
781 (compound_decode_hdr_maxsz + \
782 decode_sequence_maxsz + \
783 decode_putfh_maxsz + \
784 decode_lookup_maxsz + \
785 decode_fs_locations_maxsz + \
786 decode_renew_maxsz)
787 #define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
788 encode_sequence_maxsz + \
789 encode_putfh_maxsz + \
790 encode_secinfo_maxsz)
791 #define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
792 decode_sequence_maxsz + \
793 decode_putfh_maxsz + \
794 decode_secinfo_maxsz)
795 #define NFS4_enc_fsid_present_sz \
796 (compound_encode_hdr_maxsz + \
797 encode_sequence_maxsz + \
798 encode_putfh_maxsz + \
799 encode_getfh_maxsz + \
800 encode_renew_maxsz)
801 #define NFS4_dec_fsid_present_sz \
802 (compound_decode_hdr_maxsz + \
803 decode_sequence_maxsz + \
804 decode_putfh_maxsz + \
805 decode_getfh_maxsz + \
806 decode_renew_maxsz)
807 #if defined(CONFIG_NFS_V4_1)
808 #define NFS4_enc_bind_conn_to_session_sz \
809 (compound_encode_hdr_maxsz + \
810 encode_bind_conn_to_session_maxsz)
811 #define NFS4_dec_bind_conn_to_session_sz \
812 (compound_decode_hdr_maxsz + \
813 decode_bind_conn_to_session_maxsz)
814 #define NFS4_enc_exchange_id_sz \
815 (compound_encode_hdr_maxsz + \
816 encode_exchange_id_maxsz)
817 #define NFS4_dec_exchange_id_sz \
818 (compound_decode_hdr_maxsz + \
819 decode_exchange_id_maxsz)
820 #define NFS4_enc_create_session_sz \
821 (compound_encode_hdr_maxsz + \
822 encode_create_session_maxsz)
823 #define NFS4_dec_create_session_sz \
824 (compound_decode_hdr_maxsz + \
825 decode_create_session_maxsz)
826 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
827 encode_destroy_session_maxsz)
828 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
829 decode_destroy_session_maxsz)
830 #define NFS4_enc_destroy_clientid_sz (compound_encode_hdr_maxsz + \
831 encode_destroy_clientid_maxsz)
832 #define NFS4_dec_destroy_clientid_sz (compound_decode_hdr_maxsz + \
833 decode_destroy_clientid_maxsz)
834 #define NFS4_enc_sequence_sz \
835 (compound_decode_hdr_maxsz + \
836 encode_sequence_maxsz)
837 #define NFS4_dec_sequence_sz \
838 (compound_decode_hdr_maxsz + \
839 decode_sequence_maxsz)
840 #endif
841 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
842 encode_sequence_maxsz + \
843 encode_putrootfh_maxsz + \
844 encode_fsinfo_maxsz)
845 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
846 decode_sequence_maxsz + \
847 decode_putrootfh_maxsz + \
848 decode_fsinfo_maxsz)
849 #if defined(CONFIG_NFS_V4_1)
850 #define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
851 encode_sequence_maxsz + \
852 encode_reclaim_complete_maxsz)
853 #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
854 decode_sequence_maxsz + \
855 decode_reclaim_complete_maxsz)
856 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
857 encode_sequence_maxsz +\
858 encode_getdeviceinfo_maxsz)
859 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
860 decode_sequence_maxsz + \
861 decode_getdeviceinfo_maxsz)
862 #define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
863 encode_sequence_maxsz + \
864 encode_putfh_maxsz + \
865 encode_layoutget_maxsz)
866 #define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
867 decode_sequence_maxsz + \
868 decode_putfh_maxsz + \
869 decode_layoutget_maxsz)
870 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
871 encode_sequence_maxsz +\
872 encode_putfh_maxsz + \
873 encode_layoutcommit_maxsz + \
874 encode_getattr_maxsz)
875 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
876 decode_sequence_maxsz + \
877 decode_putfh_maxsz + \
878 decode_layoutcommit_maxsz + \
879 decode_getattr_maxsz)
880 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
881 encode_sequence_maxsz + \
882 encode_putfh_maxsz + \
883 encode_layoutreturn_maxsz)
884 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
885 decode_sequence_maxsz + \
886 decode_putfh_maxsz + \
887 decode_layoutreturn_maxsz)
888 #define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
889 encode_sequence_maxsz + \
890 encode_putrootfh_maxsz +\
891 encode_secinfo_no_name_maxsz)
892 #define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
893 decode_sequence_maxsz + \
894 decode_putrootfh_maxsz + \
895 decode_secinfo_no_name_maxsz)
896 #define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
897 encode_sequence_maxsz + \
898 encode_test_stateid_maxsz)
899 #define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
900 decode_sequence_maxsz + \
901 decode_test_stateid_maxsz)
902 #define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \
903 encode_sequence_maxsz + \
904 encode_free_stateid_maxsz)
905 #define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
906 decode_sequence_maxsz + \
907 decode_free_stateid_maxsz)
908
909 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
910 compound_encode_hdr_maxsz +
911 encode_sequence_maxsz +
912 encode_putfh_maxsz +
913 encode_getattr_maxsz) *
914 XDR_UNIT);
915
916 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
917 compound_decode_hdr_maxsz +
918 decode_sequence_maxsz +
919 decode_putfh_maxsz) *
920 XDR_UNIT);
921
922 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
923 compound_decode_hdr_maxsz +
924 decode_sequence_maxsz) *
925 XDR_UNIT);
926 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
927 #endif /* CONFIG_NFS_V4_1 */
928
929 static const umode_t nfs_type2fmt[] = {
930 [NF4BAD] = 0,
931 [NF4REG] = S_IFREG,
932 [NF4DIR] = S_IFDIR,
933 [NF4BLK] = S_IFBLK,
934 [NF4CHR] = S_IFCHR,
935 [NF4LNK] = S_IFLNK,
936 [NF4SOCK] = S_IFSOCK,
937 [NF4FIFO] = S_IFIFO,
938 [NF4ATTRDIR] = 0,
939 [NF4NAMEDATTR] = 0,
940 };
941
942 struct compound_hdr {
943 int32_t status;
944 uint32_t nops;
945 __be32 * nops_p;
946 uint32_t taglen;
947 char * tag;
948 uint32_t replen; /* expected reply words */
949 u32 minorversion;
950 };
951
952 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
953 {
954 __be32 *p = xdr_reserve_space(xdr, nbytes);
955 BUG_ON(!p);
956 return p;
957 }
958
959 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
960 {
961 WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
962 }
963
964 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
965 {
966 WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0);
967 }
968
969 static void encode_uint32(struct xdr_stream *xdr, u32 n)
970 {
971 WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
972 }
973
974 static void encode_uint64(struct xdr_stream *xdr, u64 n)
975 {
976 WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0);
977 }
978
979 static ssize_t xdr_encode_bitmap4(struct xdr_stream *xdr,
980 const __u32 *bitmap, size_t len)
981 {
982 ssize_t ret;
983
984 /* Trim empty words */
985 while (len > 0 && bitmap[len-1] == 0)
986 len--;
987 ret = xdr_stream_encode_uint32_array(xdr, bitmap, len);
988 if (WARN_ON_ONCE(ret < 0))
989 return ret;
990 return len;
991 }
992
993 static size_t mask_bitmap4(const __u32 *bitmap, const __u32 *mask,
994 __u32 *res, size_t len)
995 {
996 size_t i;
997 __u32 tmp;
998
999 while (len > 0 && (bitmap[len-1] == 0 || mask[len-1] == 0))
1000 len--;
1001 for (i = len; i-- > 0;) {
1002 tmp = bitmap[i] & mask[i];
1003 res[i] = tmp;
1004 }
1005 return len;
1006 }
1007
1008 static void encode_nfs4_seqid(struct xdr_stream *xdr,
1009 const struct nfs_seqid *seqid)
1010 {
1011 if (seqid != NULL)
1012 encode_uint32(xdr, seqid->sequence->counter);
1013 else
1014 encode_uint32(xdr, 0);
1015 }
1016
1017 static void encode_compound_hdr(struct xdr_stream *xdr,
1018 struct rpc_rqst *req,
1019 struct compound_hdr *hdr)
1020 {
1021 __be32 *p;
1022
1023 /* initialize running count of expected bytes in reply.
1024 * NOTE: the replied tag SHOULD be the same is the one sent,
1025 * but this is not required as a MUST for the server to do so. */
1026 hdr->replen = 3 + hdr->taglen;
1027
1028 WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
1029 encode_string(xdr, hdr->taglen, hdr->tag);
1030 p = reserve_space(xdr, 8);
1031 *p++ = cpu_to_be32(hdr->minorversion);
1032 hdr->nops_p = p;
1033 *p = cpu_to_be32(hdr->nops);
1034 }
1035
1036 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
1037 uint32_t replen,
1038 struct compound_hdr *hdr)
1039 {
1040 encode_uint32(xdr, op);
1041 hdr->nops++;
1042 hdr->replen += replen;
1043 }
1044
1045 static void encode_nops(struct compound_hdr *hdr)
1046 {
1047 WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
1048 *hdr->nops_p = htonl(hdr->nops);
1049 }
1050
1051 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1052 {
1053 encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1054 }
1055
1056 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1057 {
1058 encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1059 }
1060
1061 static __be32 *
1062 xdr_encode_nfstime4(__be32 *p, const struct timespec64 *t)
1063 {
1064 p = xdr_encode_hyper(p, t->tv_sec);
1065 *p++ = cpu_to_be32(t->tv_nsec);
1066 return p;
1067 }
1068
1069 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1070 const struct nfs4_label *label,
1071 const umode_t *umask,
1072 const struct nfs_server *server,
1073 const uint32_t attrmask[])
1074 {
1075 char owner_name[IDMAP_NAMESZ];
1076 char owner_group[IDMAP_NAMESZ];
1077 int owner_namelen = 0;
1078 int owner_grouplen = 0;
1079 __be32 *p;
1080 uint32_t len = 0;
1081 uint32_t bmval[3] = { 0 };
1082
1083 /*
1084 * We reserve enough space to write the entire attribute buffer at once.
1085 */
1086 if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1087 bmval[0] |= FATTR4_WORD0_SIZE;
1088 len += 8;
1089 }
1090 if (iap->ia_valid & ATTR_MODE) {
1091 if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1092 bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1093 len += 8;
1094 } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1095 bmval[1] |= FATTR4_WORD1_MODE;
1096 len += 4;
1097 }
1098 }
1099 if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1100 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1101 if (owner_namelen < 0) {
1102 dprintk("nfs: couldn't resolve uid %d to string\n",
1103 from_kuid(&init_user_ns, iap->ia_uid));
1104 /* XXX */
1105 strcpy(owner_name, "nobody");
1106 owner_namelen = sizeof("nobody") - 1;
1107 /* goto out; */
1108 }
1109 bmval[1] |= FATTR4_WORD1_OWNER;
1110 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1111 }
1112 if ((iap->ia_valid & ATTR_GID) &&
1113 (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1114 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1115 if (owner_grouplen < 0) {
1116 dprintk("nfs: couldn't resolve gid %d to string\n",
1117 from_kgid(&init_user_ns, iap->ia_gid));
1118 strcpy(owner_group, "nobody");
1119 owner_grouplen = sizeof("nobody") - 1;
1120 /* goto out; */
1121 }
1122 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1123 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1124 }
1125 if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1126 if (iap->ia_valid & ATTR_ATIME_SET) {
1127 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1128 len += 4 + (nfstime4_maxsz << 2);
1129 } else if (iap->ia_valid & ATTR_ATIME) {
1130 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1131 len += 4;
1132 }
1133 }
1134 if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1135 if (iap->ia_valid & ATTR_MTIME_SET) {
1136 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1137 len += 4 + (nfstime4_maxsz << 2);
1138 } else if (iap->ia_valid & ATTR_MTIME) {
1139 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1140 len += 4;
1141 }
1142 }
1143
1144 if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1145 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1146 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1147 }
1148
1149 xdr_encode_bitmap4(xdr, bmval, ARRAY_SIZE(bmval));
1150 xdr_stream_encode_opaque_inline(xdr, (void **)&p, len);
1151
1152 if (bmval[0] & FATTR4_WORD0_SIZE)
1153 p = xdr_encode_hyper(p, iap->ia_size);
1154 if (bmval[1] & FATTR4_WORD1_MODE)
1155 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1156 if (bmval[1] & FATTR4_WORD1_OWNER)
1157 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1158 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1159 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1160 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1161 if (iap->ia_valid & ATTR_ATIME_SET) {
1162 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1163 p = xdr_encode_nfstime4(p, &iap->ia_atime);
1164 } else
1165 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1166 }
1167 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1168 if (iap->ia_valid & ATTR_MTIME_SET) {
1169 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1170 p = xdr_encode_nfstime4(p, &iap->ia_mtime);
1171 } else
1172 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1173 }
1174 if (label && (bmval[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1175 *p++ = cpu_to_be32(label->lfs);
1176 *p++ = cpu_to_be32(label->pi);
1177 *p++ = cpu_to_be32(label->len);
1178 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1179 }
1180 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1181 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1182 *p++ = cpu_to_be32(*umask);
1183 }
1184
1185 /* out: */
1186 }
1187
1188 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1189 {
1190 encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1191 encode_uint32(xdr, access);
1192 }
1193
1194 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1195 {
1196 encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1197 encode_nfs4_seqid(xdr, arg->seqid);
1198 encode_nfs4_stateid(xdr, &arg->stateid);
1199 }
1200
1201 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1202 {
1203 __be32 *p;
1204
1205 encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1206 p = reserve_space(xdr, 12);
1207 p = xdr_encode_hyper(p, args->offset);
1208 *p = cpu_to_be32(args->count);
1209 }
1210
1211 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1212 {
1213 __be32 *p;
1214
1215 encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1216 encode_uint32(xdr, create->ftype);
1217
1218 switch (create->ftype) {
1219 case NF4LNK:
1220 p = reserve_space(xdr, 4);
1221 *p = cpu_to_be32(create->u.symlink.len);
1222 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1223 create->u.symlink.len);
1224 xdr->buf->flags |= XDRBUF_WRITE;
1225 break;
1226
1227 case NF4BLK: case NF4CHR:
1228 p = reserve_space(xdr, 8);
1229 *p++ = cpu_to_be32(create->u.device.specdata1);
1230 *p = cpu_to_be32(create->u.device.specdata2);
1231 break;
1232
1233 default:
1234 break;
1235 }
1236
1237 encode_string(xdr, create->name->len, create->name->name);
1238 encode_attrs(xdr, create->attrs, create->label, &create->umask,
1239 create->server, create->server->attr_bitmask);
1240 }
1241
1242 static void encode_getattr(struct xdr_stream *xdr,
1243 const __u32 *bitmap, const __u32 *mask, size_t len,
1244 struct compound_hdr *hdr)
1245 {
1246 __u32 masked_bitmap[nfs4_fattr_bitmap_maxsz];
1247
1248 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1249 if (mask) {
1250 if (WARN_ON_ONCE(len > ARRAY_SIZE(masked_bitmap)))
1251 len = ARRAY_SIZE(masked_bitmap);
1252 len = mask_bitmap4(bitmap, mask, masked_bitmap, len);
1253 bitmap = masked_bitmap;
1254 }
1255 xdr_encode_bitmap4(xdr, bitmap, len);
1256 }
1257
1258 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1259 {
1260 encode_getattr(xdr, nfs4_fattr_bitmap, bitmask,
1261 ARRAY_SIZE(nfs4_fattr_bitmap), hdr);
1262 }
1263
1264 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1265 const u32 *open_bitmap,
1266 struct compound_hdr *hdr)
1267 {
1268 encode_getattr(xdr, open_bitmap, bitmask, 3, hdr);
1269 }
1270
1271 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1272 {
1273 encode_getattr(xdr, nfs4_fsinfo_bitmap, bitmask,
1274 ARRAY_SIZE(nfs4_fsinfo_bitmap), hdr);
1275 }
1276
1277 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1278 {
1279 encode_getattr(xdr, nfs4_fs_locations_bitmap, bitmask,
1280 ARRAY_SIZE(nfs4_fs_locations_bitmap), hdr);
1281 }
1282
1283 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1284 {
1285 encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1286 }
1287
1288 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1289 {
1290 encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1291 encode_string(xdr, name->len, name->name);
1292 }
1293
1294 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1295 {
1296 if (fl->fl_type == F_RDLCK)
1297 return block ? NFS4_READW_LT : NFS4_READ_LT;
1298 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1299 }
1300
1301 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1302 {
1303 if (fl->fl_end == OFFSET_MAX)
1304 return ~(uint64_t)0;
1305 return fl->fl_end - fl->fl_start + 1;
1306 }
1307
1308 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1309 {
1310 __be32 *p;
1311
1312 p = reserve_space(xdr, 32);
1313 p = xdr_encode_hyper(p, lowner->clientid);
1314 *p++ = cpu_to_be32(20);
1315 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1316 *p++ = cpu_to_be32(lowner->s_dev);
1317 xdr_encode_hyper(p, lowner->id);
1318 }
1319
1320 /*
1321 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1322 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1323 */
1324 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1325 {
1326 __be32 *p;
1327
1328 encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1329 p = reserve_space(xdr, 28);
1330 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1331 *p++ = cpu_to_be32(args->reclaim);
1332 p = xdr_encode_hyper(p, args->fl->fl_start);
1333 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1334 *p = cpu_to_be32(args->new_lock_owner);
1335 if (args->new_lock_owner){
1336 encode_nfs4_seqid(xdr, args->open_seqid);
1337 encode_nfs4_stateid(xdr, &args->open_stateid);
1338 encode_nfs4_seqid(xdr, args->lock_seqid);
1339 encode_lockowner(xdr, &args->lock_owner);
1340 }
1341 else {
1342 encode_nfs4_stateid(xdr, &args->lock_stateid);
1343 encode_nfs4_seqid(xdr, args->lock_seqid);
1344 }
1345 }
1346
1347 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1348 {
1349 __be32 *p;
1350
1351 encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1352 p = reserve_space(xdr, 20);
1353 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1354 p = xdr_encode_hyper(p, args->fl->fl_start);
1355 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1356 encode_lockowner(xdr, &args->lock_owner);
1357 }
1358
1359 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1360 {
1361 __be32 *p;
1362
1363 encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1364 encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1365 encode_nfs4_seqid(xdr, args->seqid);
1366 encode_nfs4_stateid(xdr, &args->stateid);
1367 p = reserve_space(xdr, 16);
1368 p = xdr_encode_hyper(p, args->fl->fl_start);
1369 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1370 }
1371
1372 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1373 {
1374 encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1375 encode_lockowner(xdr, lowner);
1376 }
1377
1378 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1379 {
1380 encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1381 encode_string(xdr, name->len, name->name);
1382 }
1383
1384 static void encode_lookupp(struct xdr_stream *xdr, struct compound_hdr *hdr)
1385 {
1386 encode_op_hdr(xdr, OP_LOOKUPP, decode_lookupp_maxsz, hdr);
1387 }
1388
1389 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1390 {
1391 __be32 *p;
1392
1393 p = reserve_space(xdr, 8);
1394 *p++ = cpu_to_be32(share_access);
1395 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1396 }
1397
1398 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1399 {
1400 __be32 *p;
1401 /*
1402 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1403 * owner 4 = 32
1404 */
1405 encode_nfs4_seqid(xdr, arg->seqid);
1406 encode_share_access(xdr, arg->share_access);
1407 p = reserve_space(xdr, 36);
1408 p = xdr_encode_hyper(p, arg->clientid);
1409 *p++ = cpu_to_be32(24);
1410 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1411 *p++ = cpu_to_be32(arg->server->s_dev);
1412 *p++ = cpu_to_be32(arg->id.uniquifier);
1413 xdr_encode_hyper(p, arg->id.create_time);
1414 }
1415
1416 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1417 {
1418 __be32 *p;
1419
1420 p = reserve_space(xdr, 4);
1421 switch(arg->createmode) {
1422 case NFS4_CREATE_UNCHECKED:
1423 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1424 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1425 arg->server, arg->server->attr_bitmask);
1426 break;
1427 case NFS4_CREATE_GUARDED:
1428 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1429 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1430 arg->server, arg->server->attr_bitmask);
1431 break;
1432 case NFS4_CREATE_EXCLUSIVE:
1433 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1434 encode_nfs4_verifier(xdr, &arg->u.verifier);
1435 break;
1436 case NFS4_CREATE_EXCLUSIVE4_1:
1437 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1438 encode_nfs4_verifier(xdr, &arg->u.verifier);
1439 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1440 arg->server, arg->server->exclcreat_bitmask);
1441 }
1442 }
1443
1444 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1445 {
1446 __be32 *p;
1447
1448 p = reserve_space(xdr, 4);
1449 switch (arg->open_flags & O_CREAT) {
1450 case 0:
1451 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1452 break;
1453 default:
1454 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1455 encode_createmode(xdr, arg);
1456 }
1457 }
1458
1459 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1460 {
1461 __be32 *p;
1462
1463 p = reserve_space(xdr, 4);
1464 switch (delegation_type) {
1465 case 0:
1466 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1467 break;
1468 case FMODE_READ:
1469 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1470 break;
1471 case FMODE_WRITE|FMODE_READ:
1472 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1473 break;
1474 default:
1475 BUG();
1476 }
1477 }
1478
1479 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1480 {
1481 __be32 *p;
1482
1483 p = reserve_space(xdr, 4);
1484 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1485 encode_string(xdr, name->len, name->name);
1486 }
1487
1488 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1489 {
1490 __be32 *p;
1491
1492 p = reserve_space(xdr, 4);
1493 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1494 encode_delegation_type(xdr, type);
1495 }
1496
1497 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1498 {
1499 __be32 *p;
1500
1501 p = reserve_space(xdr, 4);
1502 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1503 encode_nfs4_stateid(xdr, stateid);
1504 encode_string(xdr, name->len, name->name);
1505 }
1506
1507 static inline void encode_claim_fh(struct xdr_stream *xdr)
1508 {
1509 __be32 *p;
1510
1511 p = reserve_space(xdr, 4);
1512 *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1513 }
1514
1515 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1516 {
1517 __be32 *p;
1518
1519 p = reserve_space(xdr, 4);
1520 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1521 encode_nfs4_stateid(xdr, stateid);
1522 }
1523
1524 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1525 {
1526 encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1527 encode_openhdr(xdr, arg);
1528 encode_opentype(xdr, arg);
1529 switch (arg->claim) {
1530 case NFS4_OPEN_CLAIM_NULL:
1531 encode_claim_null(xdr, arg->name);
1532 break;
1533 case NFS4_OPEN_CLAIM_PREVIOUS:
1534 encode_claim_previous(xdr, arg->u.delegation_type);
1535 break;
1536 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1537 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1538 break;
1539 case NFS4_OPEN_CLAIM_FH:
1540 encode_claim_fh(xdr);
1541 break;
1542 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1543 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1544 break;
1545 default:
1546 BUG();
1547 }
1548 }
1549
1550 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1551 {
1552 encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1553 encode_nfs4_stateid(xdr, arg->stateid);
1554 encode_nfs4_seqid(xdr, arg->seqid);
1555 }
1556
1557 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1558 {
1559 encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1560 encode_nfs4_stateid(xdr, &arg->stateid);
1561 encode_nfs4_seqid(xdr, arg->seqid);
1562 encode_share_access(xdr, arg->share_access);
1563 }
1564
1565 static void
1566 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1567 {
1568 encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1569 encode_string(xdr, fh->size, fh->data);
1570 }
1571
1572 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1573 {
1574 encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1575 }
1576
1577 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1578 struct compound_hdr *hdr)
1579 {
1580 __be32 *p;
1581
1582 encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1583 encode_nfs4_stateid(xdr, &args->stateid);
1584
1585 p = reserve_space(xdr, 12);
1586 p = xdr_encode_hyper(p, args->offset);
1587 *p = cpu_to_be32(args->count);
1588 }
1589
1590 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1591 {
1592 uint32_t attrs[3] = {
1593 FATTR4_WORD0_RDATTR_ERROR,
1594 FATTR4_WORD1_MOUNTED_ON_FILEID,
1595 };
1596 uint32_t dircount = readdir->count >> 1;
1597 __be32 *p, verf[2];
1598 uint32_t attrlen = 0;
1599 unsigned int i;
1600
1601 if (readdir->plus) {
1602 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1603 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1604 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1605 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1606 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1607 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1608 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1609 dircount >>= 1;
1610 }
1611 /* Use mounted_on_fileid only if the server supports it */
1612 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1613 attrs[0] |= FATTR4_WORD0_FILEID;
1614 for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1615 attrs[i] &= readdir->bitmask[i];
1616 if (attrs[i] != 0)
1617 attrlen = i+1;
1618 }
1619
1620 encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1621 encode_uint64(xdr, readdir->cookie);
1622 encode_nfs4_verifier(xdr, &readdir->verifier);
1623 p = reserve_space(xdr, 12 + (attrlen << 2));
1624 *p++ = cpu_to_be32(dircount);
1625 *p++ = cpu_to_be32(readdir->count);
1626 *p++ = cpu_to_be32(attrlen);
1627 for (i = 0; i < attrlen; i++)
1628 *p++ = cpu_to_be32(attrs[i]);
1629 memcpy(verf, readdir->verifier.data, sizeof(verf));
1630
1631 dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1632 __func__,
1633 (unsigned long long)readdir->cookie,
1634 verf[0], verf[1],
1635 attrs[0] & readdir->bitmask[0],
1636 attrs[1] & readdir->bitmask[1],
1637 attrs[2] & readdir->bitmask[2]);
1638 }
1639
1640 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1641 {
1642 encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1643 }
1644
1645 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1646 {
1647 encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1648 encode_string(xdr, name->len, name->name);
1649 }
1650
1651 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1652 {
1653 encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1654 encode_string(xdr, oldname->len, oldname->name);
1655 encode_string(xdr, newname->len, newname->name);
1656 }
1657
1658 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1659 struct compound_hdr *hdr)
1660 {
1661 encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1662 encode_uint64(xdr, clid);
1663 }
1664
1665 static void
1666 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1667 {
1668 encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1669 }
1670
1671 static void
1672 encode_setacl(struct xdr_stream *xdr, const struct nfs_setaclargs *arg,
1673 struct compound_hdr *hdr)
1674 {
1675 __be32 *p;
1676
1677 encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1678 encode_nfs4_stateid(xdr, &zero_stateid);
1679 p = reserve_space(xdr, 2*4);
1680 *p++ = cpu_to_be32(1);
1681 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1682 p = reserve_space(xdr, 4);
1683 *p = cpu_to_be32(arg->acl_len);
1684 xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1685 }
1686
1687 static void
1688 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1689 {
1690 encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1691 }
1692
1693 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1694 {
1695 encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1696 encode_nfs4_stateid(xdr, &arg->stateid);
1697 encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1698 server->attr_bitmask);
1699 }
1700
1701 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1702 {
1703 __be32 *p;
1704
1705 encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1706 encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1707
1708 encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1709 setclientid->sc_clnt->cl_owner_id);
1710 p = reserve_space(xdr, 4);
1711 *p = cpu_to_be32(setclientid->sc_prog);
1712 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1713 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1714 p = reserve_space(xdr, 4);
1715 *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1716 }
1717
1718 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1719 {
1720 encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1721 decode_setclientid_confirm_maxsz, hdr);
1722 encode_uint64(xdr, arg->clientid);
1723 encode_nfs4_verifier(xdr, &arg->confirm);
1724 }
1725
1726 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1727 struct compound_hdr *hdr)
1728 {
1729 __be32 *p;
1730
1731 encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1732 encode_nfs4_stateid(xdr, &args->stateid);
1733
1734 p = reserve_space(xdr, 16);
1735 p = xdr_encode_hyper(p, args->offset);
1736 *p++ = cpu_to_be32(args->stable);
1737 *p = cpu_to_be32(args->count);
1738
1739 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1740 }
1741
1742 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1743 {
1744 encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1745 encode_nfs4_stateid(xdr, stateid);
1746 }
1747
1748 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1749 {
1750 encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1751 encode_string(xdr, name->len, name->name);
1752 }
1753
1754 #if defined(CONFIG_NFS_V4_1)
1755 /* NFSv4.1 operations */
1756 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1757 const struct nfs41_bind_conn_to_session_args *args,
1758 struct compound_hdr *hdr)
1759 {
1760 __be32 *p;
1761
1762 encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1763 decode_bind_conn_to_session_maxsz, hdr);
1764 encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1765 p = xdr_reserve_space(xdr, 8);
1766 *p++ = cpu_to_be32(args->dir);
1767 *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1768 }
1769
1770 static void encode_op_map(struct xdr_stream *xdr, const struct nfs4_op_map *op_map)
1771 {
1772 unsigned int i;
1773 encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1774 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1775 encode_uint32(xdr, op_map->u.words[i]);
1776 }
1777
1778 static void encode_exchange_id(struct xdr_stream *xdr,
1779 const struct nfs41_exchange_id_args *args,
1780 struct compound_hdr *hdr)
1781 {
1782 __be32 *p;
1783 char impl_name[IMPL_NAME_LIMIT];
1784 int len = 0;
1785
1786 encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1787 encode_nfs4_verifier(xdr, &args->verifier);
1788
1789 encode_string(xdr, strlen(args->client->cl_owner_id),
1790 args->client->cl_owner_id);
1791
1792 encode_uint32(xdr, args->flags);
1793 encode_uint32(xdr, args->state_protect.how);
1794
1795 switch (args->state_protect.how) {
1796 case SP4_NONE:
1797 break;
1798 case SP4_MACH_CRED:
1799 encode_op_map(xdr, &args->state_protect.enforce);
1800 encode_op_map(xdr, &args->state_protect.allow);
1801 break;
1802 default:
1803 WARN_ON_ONCE(1);
1804 break;
1805 }
1806
1807 if (send_implementation_id &&
1808 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1809 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1810 <= sizeof(impl_name) + 1)
1811 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1812 utsname()->sysname, utsname()->release,
1813 utsname()->version, utsname()->machine);
1814
1815 if (len > 0) {
1816 encode_uint32(xdr, 1); /* implementation id array length=1 */
1817
1818 encode_string(xdr,
1819 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1820 CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1821 encode_string(xdr, len, impl_name);
1822 /* just send zeros for nii_date - the date is in nii_name */
1823 p = reserve_space(xdr, 12);
1824 p = xdr_encode_hyper(p, 0);
1825 *p = cpu_to_be32(0);
1826 } else
1827 encode_uint32(xdr, 0); /* implementation id array length=0 */
1828 }
1829
1830 static void encode_create_session(struct xdr_stream *xdr,
1831 const struct nfs41_create_session_args *args,
1832 struct compound_hdr *hdr)
1833 {
1834 __be32 *p;
1835 struct nfs_client *clp = args->client;
1836 struct rpc_clnt *clnt = clp->cl_rpcclient;
1837 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1838 u32 max_resp_sz_cached;
1839
1840 /*
1841 * Assumes OPEN is the biggest non-idempotent compound.
1842 * 2 is the verifier.
1843 */
1844 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE + 2)
1845 * XDR_UNIT + RPC_MAX_AUTH_SIZE;
1846
1847 encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1848 p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1849 p = xdr_encode_hyper(p, args->clientid);
1850 *p++ = cpu_to_be32(args->seqid); /*Sequence id */
1851 *p++ = cpu_to_be32(args->flags); /*flags */
1852
1853 /* Fore Channel */
1854 *p++ = cpu_to_be32(0); /* header padding size */
1855 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1856 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1857 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1858 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1859 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1860 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1861
1862 /* Back Channel */
1863 *p++ = cpu_to_be32(0); /* header padding size */
1864 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1865 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1866 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1867 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1868 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1869 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1870
1871 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1872 *p++ = cpu_to_be32(1);
1873 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1874
1875 /* authsys_parms rfc1831 */
1876 *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1877 p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1878 *p++ = cpu_to_be32(0); /* UID */
1879 *p++ = cpu_to_be32(0); /* GID */
1880 *p = cpu_to_be32(0); /* No more gids */
1881 }
1882
1883 static void encode_destroy_session(struct xdr_stream *xdr,
1884 const struct nfs4_session *session,
1885 struct compound_hdr *hdr)
1886 {
1887 encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1888 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1889 }
1890
1891 static void encode_destroy_clientid(struct xdr_stream *xdr,
1892 uint64_t clientid,
1893 struct compound_hdr *hdr)
1894 {
1895 encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1896 encode_uint64(xdr, clientid);
1897 }
1898
1899 static void encode_reclaim_complete(struct xdr_stream *xdr,
1900 const struct nfs41_reclaim_complete_args *args,
1901 struct compound_hdr *hdr)
1902 {
1903 encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1904 encode_uint32(xdr, args->one_fs);
1905 }
1906 #endif /* CONFIG_NFS_V4_1 */
1907
1908 static void encode_sequence(struct xdr_stream *xdr,
1909 const struct nfs4_sequence_args *args,
1910 struct compound_hdr *hdr)
1911 {
1912 #if defined(CONFIG_NFS_V4_1)
1913 struct nfs4_session *session;
1914 struct nfs4_slot_table *tp;
1915 struct nfs4_slot *slot = args->sa_slot;
1916 __be32 *p;
1917
1918 tp = slot->table;
1919 session = tp->session;
1920 if (!session)
1921 return;
1922
1923 encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1924
1925 /*
1926 * Sessionid + seqid + slotid + max slotid + cache_this
1927 */
1928 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1929 "max_slotid=%d cache_this=%d\n",
1930 __func__,
1931 ((u32 *)session->sess_id.data)[0],
1932 ((u32 *)session->sess_id.data)[1],
1933 ((u32 *)session->sess_id.data)[2],
1934 ((u32 *)session->sess_id.data)[3],
1935 slot->seq_nr, slot->slot_nr,
1936 tp->highest_used_slotid, args->sa_cache_this);
1937 p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1938 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1939 *p++ = cpu_to_be32(slot->seq_nr);
1940 *p++ = cpu_to_be32(slot->slot_nr);
1941 *p++ = cpu_to_be32(tp->highest_used_slotid);
1942 *p = cpu_to_be32(args->sa_cache_this);
1943 #endif /* CONFIG_NFS_V4_1 */
1944 }
1945
1946 #ifdef CONFIG_NFS_V4_1
1947 static void
1948 encode_getdeviceinfo(struct xdr_stream *xdr,
1949 const struct nfs4_getdeviceinfo_args *args,
1950 struct compound_hdr *hdr)
1951 {
1952 __be32 *p;
1953
1954 encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1955 p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1956 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1957 NFS4_DEVICEID4_SIZE);
1958 *p++ = cpu_to_be32(args->pdev->layout_type);
1959 *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */
1960
1961 p = reserve_space(xdr, 4 + 4);
1962 *p++ = cpu_to_be32(1); /* bitmap length */
1963 *p++ = cpu_to_be32(args->notify_types);
1964 }
1965
1966 static void
1967 encode_layoutget(struct xdr_stream *xdr,
1968 const struct nfs4_layoutget_args *args,
1969 struct compound_hdr *hdr)
1970 {
1971 __be32 *p;
1972
1973 encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1974 p = reserve_space(xdr, 36);
1975 *p++ = cpu_to_be32(0); /* Signal layout available */
1976 *p++ = cpu_to_be32(args->type);
1977 *p++ = cpu_to_be32(args->range.iomode);
1978 p = xdr_encode_hyper(p, args->range.offset);
1979 p = xdr_encode_hyper(p, args->range.length);
1980 p = xdr_encode_hyper(p, args->minlength);
1981 encode_nfs4_stateid(xdr, &args->stateid);
1982 encode_uint32(xdr, args->maxcount);
1983
1984 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1985 __func__,
1986 args->type,
1987 args->range.iomode,
1988 (unsigned long)args->range.offset,
1989 (unsigned long)args->range.length,
1990 args->maxcount);
1991 }
1992
1993 static int
1994 encode_layoutcommit(struct xdr_stream *xdr,
1995 struct inode *inode,
1996 const struct nfs4_layoutcommit_args *args,
1997 struct compound_hdr *hdr)
1998 {
1999 __be32 *p;
2000
2001 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
2002 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
2003
2004 encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2005 p = reserve_space(xdr, 20);
2006 /* Only whole file layouts */
2007 p = xdr_encode_hyper(p, 0); /* offset */
2008 p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
2009 *p = cpu_to_be32(0); /* reclaim */
2010 encode_nfs4_stateid(xdr, &args->stateid);
2011 if (args->lastbytewritten != U64_MAX) {
2012 p = reserve_space(xdr, 20);
2013 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2014 p = xdr_encode_hyper(p, args->lastbytewritten);
2015 } else {
2016 p = reserve_space(xdr, 12);
2017 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2018 }
2019 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2020 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2021
2022 encode_uint32(xdr, args->layoutupdate_len);
2023 if (args->layoutupdate_pages)
2024 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2025 args->layoutupdate_len);
2026
2027 return 0;
2028 }
2029
2030 static void
2031 encode_layoutreturn(struct xdr_stream *xdr,
2032 const struct nfs4_layoutreturn_args *args,
2033 struct compound_hdr *hdr)
2034 {
2035 __be32 *p;
2036
2037 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2038 p = reserve_space(xdr, 16);
2039 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
2040 *p++ = cpu_to_be32(args->layout_type);
2041 *p++ = cpu_to_be32(args->range.iomode);
2042 *p = cpu_to_be32(RETURN_FILE);
2043 p = reserve_space(xdr, 16);
2044 p = xdr_encode_hyper(p, args->range.offset);
2045 p = xdr_encode_hyper(p, args->range.length);
2046 spin_lock(&args->inode->i_lock);
2047 encode_nfs4_stateid(xdr, &args->stateid);
2048 spin_unlock(&args->inode->i_lock);
2049 if (args->ld_private->ops && args->ld_private->ops->encode)
2050 args->ld_private->ops->encode(xdr, args, args->ld_private);
2051 else
2052 encode_uint32(xdr, 0);
2053 }
2054
2055 static int
2056 encode_secinfo_no_name(struct xdr_stream *xdr,
2057 const struct nfs41_secinfo_no_name_args *args,
2058 struct compound_hdr *hdr)
2059 {
2060 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2061 encode_uint32(xdr, args->style);
2062 return 0;
2063 }
2064
2065 static void encode_test_stateid(struct xdr_stream *xdr,
2066 const struct nfs41_test_stateid_args *args,
2067 struct compound_hdr *hdr)
2068 {
2069 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2070 encode_uint32(xdr, 1);
2071 encode_nfs4_stateid(xdr, args->stateid);
2072 }
2073
2074 static void encode_free_stateid(struct xdr_stream *xdr,
2075 const struct nfs41_free_stateid_args *args,
2076 struct compound_hdr *hdr)
2077 {
2078 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2079 encode_nfs4_stateid(xdr, &args->stateid);
2080 }
2081 #else
2082 static inline void
2083 encode_layoutreturn(struct xdr_stream *xdr,
2084 const struct nfs4_layoutreturn_args *args,
2085 struct compound_hdr *hdr)
2086 {
2087 }
2088
2089 static void
2090 encode_layoutget(struct xdr_stream *xdr,
2091 const struct nfs4_layoutget_args *args,
2092 struct compound_hdr *hdr)
2093 {
2094 }
2095 #endif /* CONFIG_NFS_V4_1 */
2096
2097 /*
2098 * END OF "GENERIC" ENCODE ROUTINES.
2099 */
2100
2101 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2102 {
2103 #if defined(CONFIG_NFS_V4_1)
2104 struct nfs4_session *session = args->sa_slot->table->session;
2105 if (session)
2106 return session->clp->cl_mvops->minor_version;
2107 #endif /* CONFIG_NFS_V4_1 */
2108 return 0;
2109 }
2110
2111 /*
2112 * Encode an ACCESS request
2113 */
2114 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2115 const void *data)
2116 {
2117 const struct nfs4_accessargs *args = data;
2118 struct compound_hdr hdr = {
2119 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2120 };
2121
2122 encode_compound_hdr(xdr, req, &hdr);
2123 encode_sequence(xdr, &args->seq_args, &hdr);
2124 encode_putfh(xdr, args->fh, &hdr);
2125 encode_access(xdr, args->access, &hdr);
2126 if (args->bitmask)
2127 encode_getfattr(xdr, args->bitmask, &hdr);
2128 encode_nops(&hdr);
2129 }
2130
2131 /*
2132 * Encode LOOKUP request
2133 */
2134 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2135 const void *data)
2136 {
2137 const struct nfs4_lookup_arg *args = data;
2138 struct compound_hdr hdr = {
2139 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2140 };
2141
2142 encode_compound_hdr(xdr, req, &hdr);
2143 encode_sequence(xdr, &args->seq_args, &hdr);
2144 encode_putfh(xdr, args->dir_fh, &hdr);
2145 encode_lookup(xdr, args->name, &hdr);
2146 encode_getfh(xdr, &hdr);
2147 encode_getfattr(xdr, args->bitmask, &hdr);
2148 encode_nops(&hdr);
2149 }
2150
2151 /*
2152 * Encode LOOKUPP request
2153 */
2154 static void nfs4_xdr_enc_lookupp(struct rpc_rqst *req, struct xdr_stream *xdr,
2155 const void *data)
2156 {
2157 const struct nfs4_lookupp_arg *args = data;
2158 struct compound_hdr hdr = {
2159 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2160 };
2161
2162 encode_compound_hdr(xdr, req, &hdr);
2163 encode_sequence(xdr, &args->seq_args, &hdr);
2164 encode_putfh(xdr, args->fh, &hdr);
2165 encode_lookupp(xdr, &hdr);
2166 encode_getfh(xdr, &hdr);
2167 encode_getfattr(xdr, args->bitmask, &hdr);
2168 encode_nops(&hdr);
2169 }
2170
2171 /*
2172 * Encode LOOKUP_ROOT request
2173 */
2174 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2175 struct xdr_stream *xdr,
2176 const void *data)
2177 {
2178 const struct nfs4_lookup_root_arg *args = data;
2179 struct compound_hdr hdr = {
2180 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2181 };
2182
2183 encode_compound_hdr(xdr, req, &hdr);
2184 encode_sequence(xdr, &args->seq_args, &hdr);
2185 encode_putrootfh(xdr, &hdr);
2186 encode_getfh(xdr, &hdr);
2187 encode_getfattr(xdr, args->bitmask, &hdr);
2188 encode_nops(&hdr);
2189 }
2190
2191 /*
2192 * Encode REMOVE request
2193 */
2194 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2195 const void *data)
2196 {
2197 const struct nfs_removeargs *args = data;
2198 struct compound_hdr hdr = {
2199 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2200 };
2201
2202 encode_compound_hdr(xdr, req, &hdr);
2203 encode_sequence(xdr, &args->seq_args, &hdr);
2204 encode_putfh(xdr, args->fh, &hdr);
2205 encode_remove(xdr, &args->name, &hdr);
2206 encode_nops(&hdr);
2207 }
2208
2209 /*
2210 * Encode RENAME request
2211 */
2212 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2213 const void *data)
2214 {
2215 const struct nfs_renameargs *args = data;
2216 struct compound_hdr hdr = {
2217 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2218 };
2219
2220 encode_compound_hdr(xdr, req, &hdr);
2221 encode_sequence(xdr, &args->seq_args, &hdr);
2222 encode_putfh(xdr, args->old_dir, &hdr);
2223 encode_savefh(xdr, &hdr);
2224 encode_putfh(xdr, args->new_dir, &hdr);
2225 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2226 encode_nops(&hdr);
2227 }
2228
2229 /*
2230 * Encode LINK request
2231 */
2232 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2233 const void *data)
2234 {
2235 const struct nfs4_link_arg *args = data;
2236 struct compound_hdr hdr = {
2237 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2238 };
2239
2240 encode_compound_hdr(xdr, req, &hdr);
2241 encode_sequence(xdr, &args->seq_args, &hdr);
2242 encode_putfh(xdr, args->fh, &hdr);
2243 encode_savefh(xdr, &hdr);
2244 encode_putfh(xdr, args->dir_fh, &hdr);
2245 encode_link(xdr, args->name, &hdr);
2246 encode_restorefh(xdr, &hdr);
2247 encode_getfattr(xdr, args->bitmask, &hdr);
2248 encode_nops(&hdr);
2249 }
2250
2251 /*
2252 * Encode CREATE request
2253 */
2254 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2255 const void *data)
2256 {
2257 const struct nfs4_create_arg *args = data;
2258 struct compound_hdr hdr = {
2259 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2260 };
2261
2262 encode_compound_hdr(xdr, req, &hdr);
2263 encode_sequence(xdr, &args->seq_args, &hdr);
2264 encode_putfh(xdr, args->dir_fh, &hdr);
2265 encode_create(xdr, args, &hdr);
2266 encode_getfh(xdr, &hdr);
2267 encode_getfattr(xdr, args->bitmask, &hdr);
2268 encode_nops(&hdr);
2269 }
2270
2271 /*
2272 * Encode SYMLINK request
2273 */
2274 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2275 const void *data)
2276 {
2277 const struct nfs4_create_arg *args = data;
2278
2279 nfs4_xdr_enc_create(req, xdr, args);
2280 }
2281
2282 /*
2283 * Encode GETATTR request
2284 */
2285 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2286 const void *data)
2287 {
2288 const struct nfs4_getattr_arg *args = data;
2289 struct compound_hdr hdr = {
2290 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2291 };
2292
2293 encode_compound_hdr(xdr, req, &hdr);
2294 encode_sequence(xdr, &args->seq_args, &hdr);
2295 encode_putfh(xdr, args->fh, &hdr);
2296 encode_getfattr(xdr, args->bitmask, &hdr);
2297 encode_nops(&hdr);
2298 }
2299
2300 /*
2301 * Encode a CLOSE request
2302 */
2303 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2304 const void *data)
2305 {
2306 const struct nfs_closeargs *args = data;
2307 struct compound_hdr hdr = {
2308 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2309 };
2310
2311 encode_compound_hdr(xdr, req, &hdr);
2312 encode_sequence(xdr, &args->seq_args, &hdr);
2313 encode_putfh(xdr, args->fh, &hdr);
2314 if (args->lr_args)
2315 encode_layoutreturn(xdr, args->lr_args, &hdr);
2316 if (args->bitmask != NULL)
2317 encode_getfattr(xdr, args->bitmask, &hdr);
2318 encode_close(xdr, args, &hdr);
2319 encode_nops(&hdr);
2320 }
2321
2322 /*
2323 * Encode an OPEN request
2324 */
2325 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2326 const void *data)
2327 {
2328 const struct nfs_openargs *args = data;
2329 struct compound_hdr hdr = {
2330 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2331 };
2332
2333 encode_compound_hdr(xdr, req, &hdr);
2334 encode_sequence(xdr, &args->seq_args, &hdr);
2335 encode_putfh(xdr, args->fh, &hdr);
2336 encode_open(xdr, args, &hdr);
2337 encode_getfh(xdr, &hdr);
2338 if (args->access)
2339 encode_access(xdr, args->access, &hdr);
2340 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2341 if (args->lg_args) {
2342 encode_layoutget(xdr, args->lg_args, &hdr);
2343 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2344 args->lg_args->layout.pglen,
2345 hdr.replen);
2346 }
2347 encode_nops(&hdr);
2348 }
2349
2350 /*
2351 * Encode an OPEN_CONFIRM request
2352 */
2353 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2354 struct xdr_stream *xdr,
2355 const void *data)
2356 {
2357 const struct nfs_open_confirmargs *args = data;
2358 struct compound_hdr hdr = {
2359 .nops = 0,
2360 };
2361
2362 encode_compound_hdr(xdr, req, &hdr);
2363 encode_putfh(xdr, args->fh, &hdr);
2364 encode_open_confirm(xdr, args, &hdr);
2365 encode_nops(&hdr);
2366 }
2367
2368 /*
2369 * Encode an OPEN request with no attributes.
2370 */
2371 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2372 struct xdr_stream *xdr,
2373 const void *data)
2374 {
2375 const struct nfs_openargs *args = data;
2376 struct compound_hdr hdr = {
2377 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2378 };
2379
2380 encode_compound_hdr(xdr, req, &hdr);
2381 encode_sequence(xdr, &args->seq_args, &hdr);
2382 encode_putfh(xdr, args->fh, &hdr);
2383 encode_open(xdr, args, &hdr);
2384 if (args->access)
2385 encode_access(xdr, args->access, &hdr);
2386 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2387 if (args->lg_args) {
2388 encode_layoutget(xdr, args->lg_args, &hdr);
2389 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2390 args->lg_args->layout.pglen,
2391 hdr.replen);
2392 }
2393 encode_nops(&hdr);
2394 }
2395
2396 /*
2397 * Encode an OPEN_DOWNGRADE request
2398 */
2399 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2400 struct xdr_stream *xdr,
2401 const void *data)
2402 {
2403 const struct nfs_closeargs *args = data;
2404 struct compound_hdr hdr = {
2405 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2406 };
2407
2408 encode_compound_hdr(xdr, req, &hdr);
2409 encode_sequence(xdr, &args->seq_args, &hdr);
2410 encode_putfh(xdr, args->fh, &hdr);
2411 if (args->lr_args)
2412 encode_layoutreturn(xdr, args->lr_args, &hdr);
2413 encode_open_downgrade(xdr, args, &hdr);
2414 encode_nops(&hdr);
2415 }
2416
2417 /*
2418 * Encode a LOCK request
2419 */
2420 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2421 const void *data)
2422 {
2423 const struct nfs_lock_args *args = data;
2424 struct compound_hdr hdr = {
2425 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2426 };
2427
2428 encode_compound_hdr(xdr, req, &hdr);
2429 encode_sequence(xdr, &args->seq_args, &hdr);
2430 encode_putfh(xdr, args->fh, &hdr);
2431 encode_lock(xdr, args, &hdr);
2432 encode_nops(&hdr);
2433 }
2434
2435 /*
2436 * Encode a LOCKT request
2437 */
2438 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2439 const void *data)
2440 {
2441 const struct nfs_lockt_args *args = data;
2442 struct compound_hdr hdr = {
2443 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2444 };
2445
2446 encode_compound_hdr(xdr, req, &hdr);
2447 encode_sequence(xdr, &args->seq_args, &hdr);
2448 encode_putfh(xdr, args->fh, &hdr);
2449 encode_lockt(xdr, args, &hdr);
2450 encode_nops(&hdr);
2451 }
2452
2453 /*
2454 * Encode a LOCKU request
2455 */
2456 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2457 const void *data)
2458 {
2459 const struct nfs_locku_args *args = data;
2460 struct compound_hdr hdr = {
2461 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2462 };
2463
2464 encode_compound_hdr(xdr, req, &hdr);
2465 encode_sequence(xdr, &args->seq_args, &hdr);
2466 encode_putfh(xdr, args->fh, &hdr);
2467 encode_locku(xdr, args, &hdr);
2468 encode_nops(&hdr);
2469 }
2470
2471 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2472 struct xdr_stream *xdr,
2473 const void *data)
2474 {
2475 const struct nfs_release_lockowner_args *args = data;
2476 struct compound_hdr hdr = {
2477 .minorversion = 0,
2478 };
2479
2480 encode_compound_hdr(xdr, req, &hdr);
2481 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2482 encode_nops(&hdr);
2483 }
2484
2485 /*
2486 * Encode a READLINK request
2487 */
2488 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2489 const void *data)
2490 {
2491 const struct nfs4_readlink *args = data;
2492 struct compound_hdr hdr = {
2493 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2494 };
2495
2496 encode_compound_hdr(xdr, req, &hdr);
2497 encode_sequence(xdr, &args->seq_args, &hdr);
2498 encode_putfh(xdr, args->fh, &hdr);
2499 encode_readlink(xdr, args, req, &hdr);
2500
2501 rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2502 args->pglen, hdr.replen);
2503 encode_nops(&hdr);
2504 }
2505
2506 /*
2507 * Encode a READDIR request
2508 */
2509 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2510 const void *data)
2511 {
2512 const struct nfs4_readdir_arg *args = data;
2513 struct compound_hdr hdr = {
2514 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2515 };
2516
2517 encode_compound_hdr(xdr, req, &hdr);
2518 encode_sequence(xdr, &args->seq_args, &hdr);
2519 encode_putfh(xdr, args->fh, &hdr);
2520 encode_readdir(xdr, args, req, &hdr);
2521
2522 rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2523 args->count, hdr.replen);
2524 encode_nops(&hdr);
2525 }
2526
2527 /*
2528 * Encode a READ request
2529 */
2530 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2531 const void *data)
2532 {
2533 const struct nfs_pgio_args *args = data;
2534 struct compound_hdr hdr = {
2535 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2536 };
2537
2538 encode_compound_hdr(xdr, req, &hdr);
2539 encode_sequence(xdr, &args->seq_args, &hdr);
2540 encode_putfh(xdr, args->fh, &hdr);
2541 encode_read(xdr, args, &hdr);
2542
2543 rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2544 args->count, hdr.replen);
2545 req->rq_rcv_buf.flags |= XDRBUF_READ;
2546 encode_nops(&hdr);
2547 }
2548
2549 /*
2550 * Encode an SETATTR request
2551 */
2552 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2553 const void *data)
2554 {
2555 const struct nfs_setattrargs *args = data;
2556 struct compound_hdr hdr = {
2557 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2558 };
2559
2560 encode_compound_hdr(xdr, req, &hdr);
2561 encode_sequence(xdr, &args->seq_args, &hdr);
2562 encode_putfh(xdr, args->fh, &hdr);
2563 encode_setattr(xdr, args, args->server, &hdr);
2564 encode_getfattr(xdr, args->bitmask, &hdr);
2565 encode_nops(&hdr);
2566 }
2567
2568 /*
2569 * Encode a GETACL request
2570 */
2571 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2572 const void *data)
2573 {
2574 const struct nfs_getaclargs *args = data;
2575 struct compound_hdr hdr = {
2576 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2577 };
2578 const __u32 nfs4_acl_bitmap[1] = {
2579 [0] = FATTR4_WORD0_ACL,
2580 };
2581 uint32_t replen;
2582
2583 encode_compound_hdr(xdr, req, &hdr);
2584 encode_sequence(xdr, &args->seq_args, &hdr);
2585 encode_putfh(xdr, args->fh, &hdr);
2586 replen = hdr.replen + op_decode_hdr_maxsz;
2587 encode_getattr(xdr, nfs4_acl_bitmap, NULL,
2588 ARRAY_SIZE(nfs4_acl_bitmap), &hdr);
2589
2590 rpc_prepare_reply_pages(req, args->acl_pages, 0,
2591 args->acl_len, replen + 1);
2592 encode_nops(&hdr);
2593 }
2594
2595 /*
2596 * Encode a WRITE request
2597 */
2598 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2599 const void *data)
2600 {
2601 const struct nfs_pgio_args *args = data;
2602 struct compound_hdr hdr = {
2603 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2604 };
2605
2606 encode_compound_hdr(xdr, req, &hdr);
2607 encode_sequence(xdr, &args->seq_args, &hdr);
2608 encode_putfh(xdr, args->fh, &hdr);
2609 encode_write(xdr, args, &hdr);
2610 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2611 if (args->bitmask)
2612 encode_getfattr(xdr, args->bitmask, &hdr);
2613 encode_nops(&hdr);
2614 }
2615
2616 /*
2617 * a COMMIT request
2618 */
2619 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2620 const void *data)
2621 {
2622 const struct nfs_commitargs *args = data;
2623 struct compound_hdr hdr = {
2624 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2625 };
2626
2627 encode_compound_hdr(xdr, req, &hdr);
2628 encode_sequence(xdr, &args->seq_args, &hdr);
2629 encode_putfh(xdr, args->fh, &hdr);
2630 encode_commit(xdr, args, &hdr);
2631 encode_nops(&hdr);
2632 }
2633
2634 /*
2635 * FSINFO request
2636 */
2637 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2638 const void *data)
2639 {
2640 const struct nfs4_fsinfo_arg *args = data;
2641 struct compound_hdr hdr = {
2642 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2643 };
2644
2645 encode_compound_hdr(xdr, req, &hdr);
2646 encode_sequence(xdr, &args->seq_args, &hdr);
2647 encode_putfh(xdr, args->fh, &hdr);
2648 encode_fsinfo(xdr, args->bitmask, &hdr);
2649 encode_nops(&hdr);
2650 }
2651
2652 /*
2653 * a PATHCONF request
2654 */
2655 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2656 const void *data)
2657 {
2658 const struct nfs4_pathconf_arg *args = data;
2659 struct compound_hdr hdr = {
2660 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2661 };
2662
2663 encode_compound_hdr(xdr, req, &hdr);
2664 encode_sequence(xdr, &args->seq_args, &hdr);
2665 encode_putfh(xdr, args->fh, &hdr);
2666 encode_getattr(xdr, nfs4_pathconf_bitmap, args->bitmask,
2667 ARRAY_SIZE(nfs4_pathconf_bitmap), &hdr);
2668 encode_nops(&hdr);
2669 }
2670
2671 /*
2672 * a STATFS request
2673 */
2674 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2675 const void *data)
2676 {
2677 const struct nfs4_statfs_arg *args = data;
2678 struct compound_hdr hdr = {
2679 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2680 };
2681
2682 encode_compound_hdr(xdr, req, &hdr);
2683 encode_sequence(xdr, &args->seq_args, &hdr);
2684 encode_putfh(xdr, args->fh, &hdr);
2685 encode_getattr(xdr, nfs4_statfs_bitmap, args->bitmask,
2686 ARRAY_SIZE(nfs4_statfs_bitmap), &hdr);
2687 encode_nops(&hdr);
2688 }
2689
2690 /*
2691 * GETATTR_BITMAP request
2692 */
2693 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2694 struct xdr_stream *xdr,
2695 const void *data)
2696 {
2697 const struct nfs4_server_caps_arg *args = data;
2698 const u32 *bitmask = args->bitmask;
2699 struct compound_hdr hdr = {
2700 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2701 };
2702
2703 encode_compound_hdr(xdr, req, &hdr);
2704 encode_sequence(xdr, &args->seq_args, &hdr);
2705 encode_putfh(xdr, args->fhandle, &hdr);
2706 encode_getattr(xdr, bitmask, NULL, 3, &hdr);
2707 encode_nops(&hdr);
2708 }
2709
2710 /*
2711 * a RENEW request
2712 */
2713 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2714 const void *data)
2715
2716 {
2717 const struct nfs_client *clp = data;
2718 struct compound_hdr hdr = {
2719 .nops = 0,
2720 };
2721
2722 encode_compound_hdr(xdr, req, &hdr);
2723 encode_renew(xdr, clp->cl_clientid, &hdr);
2724 encode_nops(&hdr);
2725 }
2726
2727 /*
2728 * a SETCLIENTID request
2729 */
2730 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2731 struct xdr_stream *xdr,
2732 const void *data)
2733 {
2734 const struct nfs4_setclientid *sc = data;
2735 struct compound_hdr hdr = {
2736 .nops = 0,
2737 };
2738
2739 encode_compound_hdr(xdr, req, &hdr);
2740 encode_setclientid(xdr, sc, &hdr);
2741 encode_nops(&hdr);
2742 }
2743
2744 /*
2745 * a SETCLIENTID_CONFIRM request
2746 */
2747 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2748 struct xdr_stream *xdr,
2749 const void *data)
2750 {
2751 const struct nfs4_setclientid_res *arg = data;
2752 struct compound_hdr hdr = {
2753 .nops = 0,
2754 };
2755
2756 encode_compound_hdr(xdr, req, &hdr);
2757 encode_setclientid_confirm(xdr, arg, &hdr);
2758 encode_nops(&hdr);
2759 }
2760
2761 /*
2762 * DELEGRETURN request
2763 */
2764 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2765 struct xdr_stream *xdr,
2766 const void *data)
2767 {
2768 const struct nfs4_delegreturnargs *args = data;
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 if (args->lr_args)
2777 encode_layoutreturn(xdr, args->lr_args, &hdr);
2778 if (args->bitmask)
2779 encode_getfattr(xdr, args->bitmask, &hdr);
2780 encode_delegreturn(xdr, args->stateid, &hdr);
2781 encode_nops(&hdr);
2782 }
2783
2784 /*
2785 * Encode FS_LOCATIONS request
2786 */
2787 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2788 struct xdr_stream *xdr,
2789 const void *data)
2790 {
2791 const struct nfs4_fs_locations_arg *args = data;
2792 struct compound_hdr hdr = {
2793 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2794 };
2795 uint32_t replen;
2796
2797 encode_compound_hdr(xdr, req, &hdr);
2798 encode_sequence(xdr, &args->seq_args, &hdr);
2799 if (args->migration) {
2800 encode_putfh(xdr, args->fh, &hdr);
2801 replen = hdr.replen;
2802 encode_fs_locations(xdr, args->bitmask, &hdr);
2803 if (args->renew)
2804 encode_renew(xdr, args->clientid, &hdr);
2805 } else {
2806 encode_putfh(xdr, args->dir_fh, &hdr);
2807 encode_lookup(xdr, args->name, &hdr);
2808 replen = hdr.replen;
2809 encode_fs_locations(xdr, args->bitmask, &hdr);
2810 }
2811
2812 rpc_prepare_reply_pages(req, (struct page **)&args->page, 0,
2813 PAGE_SIZE, replen + 1);
2814 encode_nops(&hdr);
2815 }
2816
2817 /*
2818 * Encode SECINFO request
2819 */
2820 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2821 struct xdr_stream *xdr,
2822 const void *data)
2823 {
2824 const struct nfs4_secinfo_arg *args = data;
2825 struct compound_hdr hdr = {
2826 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2827 };
2828
2829 encode_compound_hdr(xdr, req, &hdr);
2830 encode_sequence(xdr, &args->seq_args, &hdr);
2831 encode_putfh(xdr, args->dir_fh, &hdr);
2832 encode_secinfo(xdr, args->name, &hdr);
2833 encode_nops(&hdr);
2834 }
2835
2836 /*
2837 * Encode FSID_PRESENT request
2838 */
2839 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2840 struct xdr_stream *xdr,
2841 const void *data)
2842 {
2843 const struct nfs4_fsid_present_arg *args = data;
2844 struct compound_hdr hdr = {
2845 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2846 };
2847
2848 encode_compound_hdr(xdr, req, &hdr);
2849 encode_sequence(xdr, &args->seq_args, &hdr);
2850 encode_putfh(xdr, args->fh, &hdr);
2851 encode_getfh(xdr, &hdr);
2852 if (args->renew)
2853 encode_renew(xdr, args->clientid, &hdr);
2854 encode_nops(&hdr);
2855 }
2856
2857 #if defined(CONFIG_NFS_V4_1)
2858 /*
2859 * BIND_CONN_TO_SESSION request
2860 */
2861 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2862 struct xdr_stream *xdr,
2863 const void *data)
2864 {
2865 const struct nfs41_bind_conn_to_session_args *args = data;
2866 struct compound_hdr hdr = {
2867 .minorversion = args->client->cl_mvops->minor_version,
2868 };
2869
2870 encode_compound_hdr(xdr, req, &hdr);
2871 encode_bind_conn_to_session(xdr, args, &hdr);
2872 encode_nops(&hdr);
2873 }
2874
2875 /*
2876 * EXCHANGE_ID request
2877 */
2878 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2879 struct xdr_stream *xdr,
2880 const void *data)
2881 {
2882 const struct nfs41_exchange_id_args *args = data;
2883 struct compound_hdr hdr = {
2884 .minorversion = args->client->cl_mvops->minor_version,
2885 };
2886
2887 encode_compound_hdr(xdr, req, &hdr);
2888 encode_exchange_id(xdr, args, &hdr);
2889 encode_nops(&hdr);
2890 }
2891
2892 /*
2893 * a CREATE_SESSION request
2894 */
2895 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2896 struct xdr_stream *xdr,
2897 const void *data)
2898 {
2899 const struct nfs41_create_session_args *args = data;
2900 struct compound_hdr hdr = {
2901 .minorversion = args->client->cl_mvops->minor_version,
2902 };
2903
2904 encode_compound_hdr(xdr, req, &hdr);
2905 encode_create_session(xdr, args, &hdr);
2906 encode_nops(&hdr);
2907 }
2908
2909 /*
2910 * a DESTROY_SESSION request
2911 */
2912 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2913 struct xdr_stream *xdr,
2914 const void *data)
2915 {
2916 const struct nfs4_session *session = data;
2917 struct compound_hdr hdr = {
2918 .minorversion = session->clp->cl_mvops->minor_version,
2919 };
2920
2921 encode_compound_hdr(xdr, req, &hdr);
2922 encode_destroy_session(xdr, session, &hdr);
2923 encode_nops(&hdr);
2924 }
2925
2926 /*
2927 * a DESTROY_CLIENTID request
2928 */
2929 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2930 struct xdr_stream *xdr,
2931 const void *data)
2932 {
2933 const struct nfs_client *clp = data;
2934 struct compound_hdr hdr = {
2935 .minorversion = clp->cl_mvops->minor_version,
2936 };
2937
2938 encode_compound_hdr(xdr, req, &hdr);
2939 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2940 encode_nops(&hdr);
2941 }
2942
2943 /*
2944 * a SEQUENCE request
2945 */
2946 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2947 const void *data)
2948 {
2949 const struct nfs4_sequence_args *args = data;
2950 struct compound_hdr hdr = {
2951 .minorversion = nfs4_xdr_minorversion(args),
2952 };
2953
2954 encode_compound_hdr(xdr, req, &hdr);
2955 encode_sequence(xdr, args, &hdr);
2956 encode_nops(&hdr);
2957 }
2958
2959 #endif
2960
2961 /*
2962 * a GET_LEASE_TIME request
2963 */
2964 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2965 struct xdr_stream *xdr,
2966 const void *data)
2967 {
2968 const struct nfs4_get_lease_time_args *args = data;
2969 struct compound_hdr hdr = {
2970 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2971 };
2972 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2973
2974 encode_compound_hdr(xdr, req, &hdr);
2975 encode_sequence(xdr, &args->la_seq_args, &hdr);
2976 encode_putrootfh(xdr, &hdr);
2977 encode_fsinfo(xdr, lease_bitmap, &hdr);
2978 encode_nops(&hdr);
2979 }
2980
2981 #ifdef CONFIG_NFS_V4_1
2982
2983 /*
2984 * a RECLAIM_COMPLETE request
2985 */
2986 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2987 struct xdr_stream *xdr,
2988 const void *data)
2989 {
2990 const struct nfs41_reclaim_complete_args *args = data;
2991 struct compound_hdr hdr = {
2992 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2993 };
2994
2995 encode_compound_hdr(xdr, req, &hdr);
2996 encode_sequence(xdr, &args->seq_args, &hdr);
2997 encode_reclaim_complete(xdr, args, &hdr);
2998 encode_nops(&hdr);
2999 }
3000
3001 /*
3002 * Encode GETDEVICEINFO request
3003 */
3004 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
3005 struct xdr_stream *xdr,
3006 const void *data)
3007 {
3008 const struct nfs4_getdeviceinfo_args *args = data;
3009 struct compound_hdr hdr = {
3010 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3011 };
3012 uint32_t replen;
3013
3014 encode_compound_hdr(xdr, req, &hdr);
3015 encode_sequence(xdr, &args->seq_args, &hdr);
3016
3017 replen = hdr.replen + op_decode_hdr_maxsz;
3018
3019 encode_getdeviceinfo(xdr, args, &hdr);
3020
3021 /* set up reply kvec. device_addr4 opaque data is read into the
3022 * pages */
3023 rpc_prepare_reply_pages(req, args->pdev->pages, args->pdev->pgbase,
3024 args->pdev->pglen, replen + 2 + 1);
3025 encode_nops(&hdr);
3026 }
3027
3028 /*
3029 * Encode LAYOUTGET request
3030 */
3031 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
3032 struct xdr_stream *xdr,
3033 const void *data)
3034 {
3035 const struct nfs4_layoutget_args *args = data;
3036 struct compound_hdr hdr = {
3037 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3038 };
3039
3040 encode_compound_hdr(xdr, req, &hdr);
3041 encode_sequence(xdr, &args->seq_args, &hdr);
3042 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3043 encode_layoutget(xdr, args, &hdr);
3044
3045 rpc_prepare_reply_pages(req, args->layout.pages, 0,
3046 args->layout.pglen, hdr.replen);
3047 encode_nops(&hdr);
3048 }
3049
3050 /*
3051 * Encode LAYOUTCOMMIT request
3052 */
3053 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3054 struct xdr_stream *xdr,
3055 const void *priv)
3056 {
3057 const struct nfs4_layoutcommit_args *args = priv;
3058 struct nfs4_layoutcommit_data *data =
3059 container_of(args, struct nfs4_layoutcommit_data, args);
3060 struct compound_hdr hdr = {
3061 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3062 };
3063
3064 encode_compound_hdr(xdr, req, &hdr);
3065 encode_sequence(xdr, &args->seq_args, &hdr);
3066 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3067 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3068 encode_getfattr(xdr, args->bitmask, &hdr);
3069 encode_nops(&hdr);
3070 }
3071
3072 /*
3073 * Encode LAYOUTRETURN request
3074 */
3075 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3076 struct xdr_stream *xdr,
3077 const void *data)
3078 {
3079 const struct nfs4_layoutreturn_args *args = data;
3080 struct compound_hdr hdr = {
3081 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3082 };
3083
3084 encode_compound_hdr(xdr, req, &hdr);
3085 encode_sequence(xdr, &args->seq_args, &hdr);
3086 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3087 encode_layoutreturn(xdr, args, &hdr);
3088 encode_nops(&hdr);
3089 }
3090
3091 /*
3092 * Encode SECINFO_NO_NAME request
3093 */
3094 static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3095 struct xdr_stream *xdr,
3096 const void *data)
3097 {
3098 const struct nfs41_secinfo_no_name_args *args = data;
3099 struct compound_hdr hdr = {
3100 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3101 };
3102
3103 encode_compound_hdr(xdr, req, &hdr);
3104 encode_sequence(xdr, &args->seq_args, &hdr);
3105 encode_putrootfh(xdr, &hdr);
3106 encode_secinfo_no_name(xdr, args, &hdr);
3107 encode_nops(&hdr);
3108 }
3109
3110 /*
3111 * Encode TEST_STATEID request
3112 */
3113 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3114 struct xdr_stream *xdr,
3115 const void *data)
3116 {
3117 const struct nfs41_test_stateid_args *args = data;
3118 struct compound_hdr hdr = {
3119 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3120 };
3121
3122 encode_compound_hdr(xdr, req, &hdr);
3123 encode_sequence(xdr, &args->seq_args, &hdr);
3124 encode_test_stateid(xdr, args, &hdr);
3125 encode_nops(&hdr);
3126 }
3127
3128 /*
3129 * Encode FREE_STATEID request
3130 */
3131 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3132 struct xdr_stream *xdr,
3133 const void *data)
3134 {
3135 const struct nfs41_free_stateid_args *args = data;
3136 struct compound_hdr hdr = {
3137 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3138 };
3139
3140 encode_compound_hdr(xdr, req, &hdr);
3141 encode_sequence(xdr, &args->seq_args, &hdr);
3142 encode_free_stateid(xdr, args, &hdr);
3143 encode_nops(&hdr);
3144 }
3145 #endif /* CONFIG_NFS_V4_1 */
3146
3147 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3148 {
3149 ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3150 NFS4_OPAQUE_LIMIT);
3151 if (unlikely(ret < 0))
3152 return -EIO;
3153 *len = ret;
3154 return 0;
3155 }
3156
3157 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3158 {
3159 __be32 *p;
3160
3161 p = xdr_inline_decode(xdr, 8);
3162 if (unlikely(!p))
3163 return -EIO;
3164 hdr->status = be32_to_cpup(p++);
3165 hdr->taglen = be32_to_cpup(p);
3166
3167 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3168 if (unlikely(!p))
3169 return -EIO;
3170 hdr->tag = (char *)p;
3171 p += XDR_QUADLEN(hdr->taglen);
3172 hdr->nops = be32_to_cpup(p);
3173 if (unlikely(hdr->nops < 1))
3174 return nfs4_stat_to_errno(hdr->status);
3175 return 0;
3176 }
3177
3178 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3179 int *nfs_retval)
3180 {
3181 __be32 *p;
3182 uint32_t opnum;
3183 int32_t nfserr;
3184
3185 p = xdr_inline_decode(xdr, 8);
3186 if (unlikely(!p))
3187 goto out_overflow;
3188 opnum = be32_to_cpup(p++);
3189 if (unlikely(opnum != expected))
3190 goto out_bad_operation;
3191 if (unlikely(*p != cpu_to_be32(NFS_OK)))
3192 goto out_status;
3193 *nfs_retval = 0;
3194 return true;
3195 out_status:
3196 nfserr = be32_to_cpup(p);
3197 trace_nfs4_xdr_status(xdr, opnum, nfserr);
3198 *nfs_retval = nfs4_stat_to_errno(nfserr);
3199 return true;
3200 out_bad_operation:
3201 dprintk("nfs: Server returned operation"
3202 " %d but we issued a request for %d\n",
3203 opnum, expected);
3204 *nfs_retval = -EREMOTEIO;
3205 return false;
3206 out_overflow:
3207 *nfs_retval = -EIO;
3208 return false;
3209 }
3210
3211 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3212 {
3213 int retval;
3214
3215 __decode_op_hdr(xdr, expected, &retval);
3216 return retval;
3217 }
3218
3219 /* Dummy routine */
3220 static int decode_ace(struct xdr_stream *xdr, void *ace)
3221 {
3222 __be32 *p;
3223 unsigned int strlen;
3224 char *str;
3225
3226 p = xdr_inline_decode(xdr, 12);
3227 if (unlikely(!p))
3228 return -EIO;
3229 return decode_opaque_inline(xdr, &strlen, &str);
3230 }
3231
3232 static ssize_t
3233 decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
3234 {
3235 ssize_t ret;
3236
3237 ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
3238 if (likely(ret >= 0))
3239 return ret;
3240 if (ret != -EMSGSIZE)
3241 return -EIO;
3242 return sz;
3243 }
3244
3245 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3246 {
3247 ssize_t ret;
3248 ret = decode_bitmap4(xdr, bitmap, 3);
3249 return ret < 0 ? ret : 0;
3250 }
3251
3252 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3253 {
3254 __be32 *p;
3255
3256 p = xdr_inline_decode(xdr, 4);
3257 if (unlikely(!p))
3258 return -EIO;
3259 *attrlen = be32_to_cpup(p);
3260 *savep = xdr_stream_pos(xdr);
3261 return 0;
3262 }
3263
3264 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3265 {
3266 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3267 int ret;
3268 ret = decode_attr_bitmap(xdr, bitmask);
3269 if (unlikely(ret < 0))
3270 return ret;
3271 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3272 } else
3273 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3274 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3275 bitmask[0], bitmask[1], bitmask[2]);
3276 return 0;
3277 }
3278
3279 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3280 {
3281 __be32 *p;
3282 int ret = 0;
3283
3284 *type = 0;
3285 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3286 return -EIO;
3287 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3288 p = xdr_inline_decode(xdr, 4);
3289 if (unlikely(!p))
3290 return -EIO;
3291 *type = be32_to_cpup(p);
3292 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3293 dprintk("%s: bad type %d\n", __func__, *type);
3294 return -EIO;
3295 }
3296 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3297 ret = NFS_ATTR_FATTR_TYPE;
3298 }
3299 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3300 return ret;
3301 }
3302
3303 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3304 uint32_t *bitmap, uint32_t *type)
3305 {
3306 __be32 *p;
3307
3308 *type = 0;
3309 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3310 return -EIO;
3311 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3312 p = xdr_inline_decode(xdr, 4);
3313 if (unlikely(!p))
3314 return -EIO;
3315 *type = be32_to_cpup(p);
3316 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3317 }
3318 dprintk("%s: expire type=0x%x\n", __func__, *type);
3319 return 0;
3320 }
3321
3322 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3323 {
3324 __be32 *p;
3325 int ret = 0;
3326
3327 *change = 0;
3328 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3329 return -EIO;
3330 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3331 p = xdr_inline_decode(xdr, 8);
3332 if (unlikely(!p))
3333 return -EIO;
3334 xdr_decode_hyper(p, change);
3335 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3336 ret = NFS_ATTR_FATTR_CHANGE;
3337 }
3338 dprintk("%s: change attribute=%Lu\n", __func__,
3339 (unsigned long long)*change);
3340 return ret;
3341 }
3342
3343 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3344 {
3345 __be32 *p;
3346 int ret = 0;
3347
3348 *size = 0;
3349 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3350 return -EIO;
3351 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3352 p = xdr_inline_decode(xdr, 8);
3353 if (unlikely(!p))
3354 return -EIO;
3355 xdr_decode_hyper(p, size);
3356 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3357 ret = NFS_ATTR_FATTR_SIZE;
3358 }
3359 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3360 return ret;
3361 }
3362
3363 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3364 {
3365 __be32 *p;
3366
3367 *res = 0;
3368 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3369 return -EIO;
3370 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3371 p = xdr_inline_decode(xdr, 4);
3372 if (unlikely(!p))
3373 return -EIO;
3374 *res = be32_to_cpup(p);
3375 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3376 }
3377 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3378 return 0;
3379 }
3380
3381 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3382 {
3383 __be32 *p;
3384
3385 *res = 0;
3386 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3387 return -EIO;
3388 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3389 p = xdr_inline_decode(xdr, 4);
3390 if (unlikely(!p))
3391 return -EIO;
3392 *res = be32_to_cpup(p);
3393 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3394 }
3395 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3396 return 0;
3397 }
3398
3399 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3400 {
3401 __be32 *p;
3402 int ret = 0;
3403
3404 fsid->major = 0;
3405 fsid->minor = 0;
3406 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3407 return -EIO;
3408 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3409 p = xdr_inline_decode(xdr, 16);
3410 if (unlikely(!p))
3411 return -EIO;
3412 p = xdr_decode_hyper(p, &fsid->major);
3413 xdr_decode_hyper(p, &fsid->minor);
3414 bitmap[0] &= ~FATTR4_WORD0_FSID;
3415 ret = NFS_ATTR_FATTR_FSID;
3416 }
3417 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3418 (unsigned long long)fsid->major,
3419 (unsigned long long)fsid->minor);
3420 return ret;
3421 }
3422
3423 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3424 {
3425 __be32 *p;
3426
3427 *res = 60;
3428 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3429 return -EIO;
3430 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3431 p = xdr_inline_decode(xdr, 4);
3432 if (unlikely(!p))
3433 return -EIO;
3434 *res = be32_to_cpup(p);
3435 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3436 }
3437 dprintk("%s: lease time=%u\n", __func__, (unsigned int)*res);
3438 return 0;
3439 }
3440
3441 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3442 {
3443 __be32 *p;
3444
3445 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3446 return -EIO;
3447 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3448 p = xdr_inline_decode(xdr, 4);
3449 if (unlikely(!p))
3450 return -EIO;
3451 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3452 *res = -be32_to_cpup(p);
3453 }
3454 return 0;
3455 }
3456
3457 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3458 uint32_t *bitmap, uint32_t *bitmask)
3459 {
3460 if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3461 int ret;
3462 ret = decode_attr_bitmap(xdr, bitmask);
3463 if (unlikely(ret < 0))
3464 return ret;
3465 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3466 } else
3467 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3468 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3469 bitmask[0], bitmask[1], bitmask[2]);
3470 return 0;
3471 }
3472
3473 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3474 {
3475 __be32 *p;
3476 u32 len;
3477
3478 if (fh != NULL)
3479 memset(fh, 0, sizeof(*fh));
3480
3481 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3482 return -EIO;
3483 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3484 p = xdr_inline_decode(xdr, 4);
3485 if (unlikely(!p))
3486 return -EIO;
3487 len = be32_to_cpup(p);
3488 if (len > NFS4_FHSIZE)
3489 return -EIO;
3490 p = xdr_inline_decode(xdr, len);
3491 if (unlikely(!p))
3492 return -EIO;
3493 if (fh != NULL) {
3494 memcpy(fh->data, p, len);
3495 fh->size = len;
3496 }
3497 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3498 }
3499 return 0;
3500 }
3501
3502 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3503 {
3504 __be32 *p;
3505
3506 *res = 0;
3507 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3508 return -EIO;
3509 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3510 p = xdr_inline_decode(xdr, 4);
3511 if (unlikely(!p))
3512 return -EIO;
3513 *res = be32_to_cpup(p);
3514 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3515 }
3516 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3517 return 0;
3518 }
3519
3520 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3521 {
3522 __be32 *p;
3523 int ret = 0;
3524
3525 *fileid = 0;
3526 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3527 return -EIO;
3528 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3529 p = xdr_inline_decode(xdr, 8);
3530 if (unlikely(!p))
3531 return -EIO;
3532 xdr_decode_hyper(p, fileid);
3533 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3534 ret = NFS_ATTR_FATTR_FILEID;
3535 }
3536 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3537 return ret;
3538 }
3539
3540 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3541 {
3542 __be32 *p;
3543 int ret = 0;
3544
3545 *fileid = 0;
3546 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3547 return -EIO;
3548 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3549 p = xdr_inline_decode(xdr, 8);
3550 if (unlikely(!p))
3551 return -EIO;
3552 xdr_decode_hyper(p, fileid);
3553 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3554 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3555 }
3556 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3557 return ret;
3558 }
3559
3560 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3561 {
3562 __be32 *p;
3563 int status = 0;
3564
3565 *res = 0;
3566 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3567 return -EIO;
3568 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3569 p = xdr_inline_decode(xdr, 8);
3570 if (unlikely(!p))
3571 return -EIO;
3572 xdr_decode_hyper(p, res);
3573 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3574 }
3575 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3576 return status;
3577 }
3578
3579 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3580 {
3581 __be32 *p;
3582 int status = 0;
3583
3584 *res = 0;
3585 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3586 return -EIO;
3587 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3588 p = xdr_inline_decode(xdr, 8);
3589 if (unlikely(!p))
3590 return -EIO;
3591 xdr_decode_hyper(p, res);
3592 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3593 }
3594 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3595 return status;
3596 }
3597
3598 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3599 {
3600 __be32 *p;
3601 int status = 0;
3602
3603 *res = 0;
3604 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3605 return -EIO;
3606 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3607 p = xdr_inline_decode(xdr, 8);
3608 if (unlikely(!p))
3609 return -EIO;
3610 xdr_decode_hyper(p, res);
3611 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3612 }
3613 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3614 return status;
3615 }
3616
3617 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3618 {
3619 u32 n;
3620 __be32 *p;
3621 int status = 0;
3622
3623 p = xdr_inline_decode(xdr, 4);
3624 if (unlikely(!p))
3625 return -EIO;
3626 n = be32_to_cpup(p);
3627 if (n == 0)
3628 goto root_path;
3629 dprintk("pathname4: ");
3630 if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3631 dprintk("cannot parse %d components in path\n", n);
3632 goto out_eio;
3633 }
3634 for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3635 struct nfs4_string *component = &path->components[path->ncomponents];
3636 status = decode_opaque_inline(xdr, &component->len, &component->data);
3637 if (unlikely(status != 0))
3638 goto out_eio;
3639 ifdebug (XDR)
3640 pr_cont("%s%.*s ",
3641 (path->ncomponents != n ? "/ " : ""),
3642 component->len, component->data);
3643 }
3644 out:
3645 return status;
3646 root_path:
3647 /* a root pathname is sent as a zero component4 */
3648 path->ncomponents = 1;
3649 path->components[0].len=0;
3650 path->components[0].data=NULL;
3651 dprintk("pathname4: /\n");
3652 goto out;
3653 out_eio:
3654 dprintk(" status %d", status);
3655 status = -EIO;
3656 goto out;
3657 }
3658
3659 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3660 {
3661 int n;
3662 __be32 *p;
3663 int status = -EIO;
3664
3665 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3666 goto out;
3667 status = 0;
3668 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3669 goto out;
3670 bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3671 status = -EIO;
3672 /* Ignore borken servers that return unrequested attrs */
3673 if (unlikely(res == NULL))
3674 goto out;
3675 dprintk("%s: fsroot:\n", __func__);
3676 status = decode_pathname(xdr, &res->fs_path);
3677 if (unlikely(status != 0))
3678 goto out;
3679 p = xdr_inline_decode(xdr, 4);
3680 if (unlikely(!p))
3681 goto out_eio;
3682 n = be32_to_cpup(p);
3683 if (n <= 0)
3684 goto out_eio;
3685 for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3686 u32 m;
3687 struct nfs4_fs_location *loc;
3688
3689 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3690 break;
3691 loc = &res->locations[res->nlocations];
3692 p = xdr_inline_decode(xdr, 4);
3693 if (unlikely(!p))
3694 goto out_eio;
3695 m = be32_to_cpup(p);
3696
3697 dprintk("%s: servers:\n", __func__);
3698 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3699 struct nfs4_string *server;
3700
3701 if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3702 unsigned int i;
3703 dprintk("%s: using first %u of %u servers "
3704 "returned for location %u\n",
3705 __func__,
3706 NFS4_FS_LOCATION_MAXSERVERS,
3707 m, res->nlocations);
3708 for (i = loc->nservers; i < m; i++) {
3709 unsigned int len;
3710 char *data;
3711 status = decode_opaque_inline(xdr, &len, &data);
3712 if (unlikely(status != 0))
3713 goto out_eio;
3714 }
3715 break;
3716 }
3717 server = &loc->servers[loc->nservers];
3718 status = decode_opaque_inline(xdr, &server->len, &server->data);
3719 if (unlikely(status != 0))
3720 goto out_eio;
3721 dprintk("%s ", server->data);
3722 }
3723 status = decode_pathname(xdr, &loc->rootpath);
3724 if (unlikely(status != 0))
3725 goto out_eio;
3726 }
3727 if (res->nlocations != 0)
3728 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3729 out:
3730 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3731 return status;
3732 out_eio:
3733 status = -EIO;
3734 goto out;
3735 }
3736
3737 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3738 {
3739 __be32 *p;
3740 int status = 0;
3741
3742 *res = 0;
3743 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3744 return -EIO;
3745 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3746 p = xdr_inline_decode(xdr, 8);
3747 if (unlikely(!p))
3748 return -EIO;
3749 xdr_decode_hyper(p, res);
3750 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3751 }
3752 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3753 return status;
3754 }
3755
3756 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3757 {
3758 __be32 *p;
3759 int status = 0;
3760
3761 *maxlink = 1;
3762 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3763 return -EIO;
3764 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3765 p = xdr_inline_decode(xdr, 4);
3766 if (unlikely(!p))
3767 return -EIO;
3768 *maxlink = be32_to_cpup(p);
3769 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3770 }
3771 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3772 return status;
3773 }
3774
3775 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3776 {
3777 __be32 *p;
3778 int status = 0;
3779
3780 *maxname = 1024;
3781 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3782 return -EIO;
3783 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3784 p = xdr_inline_decode(xdr, 4);
3785 if (unlikely(!p))
3786 return -EIO;
3787 *maxname = be32_to_cpup(p);
3788 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3789 }
3790 dprintk("%s: maxname=%u\n", __func__, *maxname);
3791 return status;
3792 }
3793
3794 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3795 {
3796 __be32 *p;
3797 int status = 0;
3798
3799 *res = 1024;
3800 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3801 return -EIO;
3802 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3803 uint64_t maxread;
3804 p = xdr_inline_decode(xdr, 8);
3805 if (unlikely(!p))
3806 return -EIO;
3807 xdr_decode_hyper(p, &maxread);
3808 if (maxread > 0x7FFFFFFF)
3809 maxread = 0x7FFFFFFF;
3810 *res = (uint32_t)maxread;
3811 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3812 }
3813 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3814 return status;
3815 }
3816
3817 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3818 {
3819 __be32 *p;
3820 int status = 0;
3821
3822 *res = 1024;
3823 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3824 return -EIO;
3825 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3826 uint64_t maxwrite;
3827 p = xdr_inline_decode(xdr, 8);
3828 if (unlikely(!p))
3829 return -EIO;
3830 xdr_decode_hyper(p, &maxwrite);
3831 if (maxwrite > 0x7FFFFFFF)
3832 maxwrite = 0x7FFFFFFF;
3833 *res = (uint32_t)maxwrite;
3834 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3835 }
3836 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3837 return status;
3838 }
3839
3840 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3841 {
3842 uint32_t tmp;
3843 __be32 *p;
3844 int ret = 0;
3845
3846 *mode = 0;
3847 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3848 return -EIO;
3849 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3850 p = xdr_inline_decode(xdr, 4);
3851 if (unlikely(!p))
3852 return -EIO;
3853 tmp = be32_to_cpup(p);
3854 *mode = tmp & ~S_IFMT;
3855 bitmap[1] &= ~FATTR4_WORD1_MODE;
3856 ret = NFS_ATTR_FATTR_MODE;
3857 }
3858 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3859 return ret;
3860 }
3861
3862 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3863 {
3864 __be32 *p;
3865 int ret = 0;
3866
3867 *nlink = 1;
3868 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3869 return -EIO;
3870 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3871 p = xdr_inline_decode(xdr, 4);
3872 if (unlikely(!p))
3873 return -EIO;
3874 *nlink = be32_to_cpup(p);
3875 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3876 ret = NFS_ATTR_FATTR_NLINK;
3877 }
3878 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3879 return ret;
3880 }
3881
3882 static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3883 struct nfs4_string *name, gfp_t gfp_flags)
3884 {
3885 ssize_t ret;
3886
3887 ret = xdr_stream_decode_string_dup(xdr, &name->data,
3888 XDR_MAX_NETOBJ, gfp_flags);
3889 name->len = 0;
3890 if (ret > 0)
3891 name->len = ret;
3892 return ret;
3893 }
3894
3895 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3896 const struct nfs_server *server, kuid_t *uid,
3897 struct nfs4_string *owner_name)
3898 {
3899 ssize_t len;
3900 char *p;
3901
3902 *uid = make_kuid(&init_user_ns, -2);
3903 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3904 return -EIO;
3905 if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3906 return 0;
3907 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3908
3909 if (owner_name != NULL) {
3910 len = decode_nfs4_string(xdr, owner_name, GFP_NOIO);
3911 if (len <= 0)
3912 goto out;
3913 dprintk("%s: name=%s\n", __func__, owner_name->data);
3914 return NFS_ATTR_FATTR_OWNER_NAME;
3915 } else {
3916 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3917 XDR_MAX_NETOBJ);
3918 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3919 goto out;
3920 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3921 return NFS_ATTR_FATTR_OWNER;
3922 }
3923 out:
3924 if (len == -EBADMSG)
3925 return -EIO;
3926 return 0;
3927 }
3928
3929 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3930 const struct nfs_server *server, kgid_t *gid,
3931 struct nfs4_string *group_name)
3932 {
3933 ssize_t len;
3934 char *p;
3935
3936 *gid = make_kgid(&init_user_ns, -2);
3937 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3938 return -EIO;
3939 if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
3940 return 0;
3941 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3942
3943 if (group_name != NULL) {
3944 len = decode_nfs4_string(xdr, group_name, GFP_NOIO);
3945 if (len <= 0)
3946 goto out;
3947 dprintk("%s: name=%s\n", __func__, group_name->data);
3948 return NFS_ATTR_FATTR_GROUP_NAME;
3949 } else {
3950 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3951 XDR_MAX_NETOBJ);
3952 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
3953 goto out;
3954 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3955 return NFS_ATTR_FATTR_GROUP;
3956 }
3957 out:
3958 if (len == -EBADMSG)
3959 return -EIO;
3960 return 0;
3961 }
3962
3963 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3964 {
3965 uint32_t major = 0, minor = 0;
3966 __be32 *p;
3967 int ret = 0;
3968
3969 *rdev = MKDEV(0,0);
3970 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3971 return -EIO;
3972 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3973 dev_t tmp;
3974
3975 p = xdr_inline_decode(xdr, 8);
3976 if (unlikely(!p))
3977 return -EIO;
3978 major = be32_to_cpup(p++);
3979 minor = be32_to_cpup(p);
3980 tmp = MKDEV(major, minor);
3981 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3982 *rdev = tmp;
3983 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3984 ret = NFS_ATTR_FATTR_RDEV;
3985 }
3986 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3987 return ret;
3988 }
3989
3990 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3991 {
3992 __be32 *p;
3993 int status = 0;
3994
3995 *res = 0;
3996 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3997 return -EIO;
3998 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3999 p = xdr_inline_decode(xdr, 8);
4000 if (unlikely(!p))
4001 return -EIO;
4002 xdr_decode_hyper(p, res);
4003 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4004 }
4005 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4006 return status;
4007 }
4008
4009 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4010 {
4011 __be32 *p;
4012 int status = 0;
4013
4014 *res = 0;
4015 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4016 return -EIO;
4017 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4018 p = xdr_inline_decode(xdr, 8);
4019 if (unlikely(!p))
4020 return -EIO;
4021 xdr_decode_hyper(p, res);
4022 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4023 }
4024 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4025 return status;
4026 }
4027
4028 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4029 {
4030 __be32 *p;
4031 int status = 0;
4032
4033 *res = 0;
4034 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4035 return -EIO;
4036 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4037 p = xdr_inline_decode(xdr, 8);
4038 if (unlikely(!p))
4039 return -EIO;
4040 xdr_decode_hyper(p, res);
4041 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4042 }
4043 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4044 return status;
4045 }
4046
4047 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4048 {
4049 __be32 *p;
4050 int ret = 0;
4051
4052 *used = 0;
4053 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4054 return -EIO;
4055 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4056 p = xdr_inline_decode(xdr, 8);
4057 if (unlikely(!p))
4058 return -EIO;
4059 xdr_decode_hyper(p, used);
4060 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4061 ret = NFS_ATTR_FATTR_SPACE_USED;
4062 }
4063 dprintk("%s: space used=%Lu\n", __func__,
4064 (unsigned long long)*used);
4065 return ret;
4066 }
4067
4068 static __be32 *
4069 xdr_decode_nfstime4(__be32 *p, struct timespec64 *t)
4070 {
4071 __u64 sec;
4072
4073 p = xdr_decode_hyper(p, &sec);
4074 t-> tv_sec = sec;
4075 t->tv_nsec = be32_to_cpup(p++);
4076 return p;
4077 }
4078
4079 static int decode_attr_time(struct xdr_stream *xdr, struct timespec64 *time)
4080 {
4081 __be32 *p;
4082
4083 p = xdr_inline_decode(xdr, nfstime4_maxsz << 2);
4084 if (unlikely(!p))
4085 return -EIO;
4086 xdr_decode_nfstime4(p, time);
4087 return 0;
4088 }
4089
4090 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4091 {
4092 int status = 0;
4093
4094 time->tv_sec = 0;
4095 time->tv_nsec = 0;
4096 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4097 return -EIO;
4098 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4099 status = decode_attr_time(xdr, time);
4100 if (status == 0)
4101 status = NFS_ATTR_FATTR_ATIME;
4102 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4103 }
4104 dprintk("%s: atime=%lld\n", __func__, time->tv_sec);
4105 return status;
4106 }
4107
4108 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4109 {
4110 int status = 0;
4111
4112 time->tv_sec = 0;
4113 time->tv_nsec = 0;
4114 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4115 return -EIO;
4116 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4117 status = decode_attr_time(xdr, time);
4118 if (status == 0)
4119 status = NFS_ATTR_FATTR_CTIME;
4120 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4121 }
4122 dprintk("%s: ctime=%lld\n", __func__, time->tv_sec);
4123 return status;
4124 }
4125
4126 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4127 struct timespec64 *time)
4128 {
4129 int status = 0;
4130
4131 time->tv_sec = 0;
4132 time->tv_nsec = 0;
4133 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4134 return -EIO;
4135 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4136 status = decode_attr_time(xdr, time);
4137 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4138 }
4139 dprintk("%s: time_delta=%lld %ld\n", __func__, time->tv_sec,
4140 time->tv_nsec);
4141 return status;
4142 }
4143
4144 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4145 struct nfs4_label *label)
4146 {
4147 uint32_t pi = 0;
4148 uint32_t lfs = 0;
4149 __u32 len;
4150 __be32 *p;
4151 int status = 0;
4152
4153 if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4154 return -EIO;
4155 if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4156 p = xdr_inline_decode(xdr, 4);
4157 if (unlikely(!p))
4158 return -EIO;
4159 lfs = be32_to_cpup(p++);
4160 p = xdr_inline_decode(xdr, 4);
4161 if (unlikely(!p))
4162 return -EIO;
4163 pi = be32_to_cpup(p++);
4164 p = xdr_inline_decode(xdr, 4);
4165 if (unlikely(!p))
4166 return -EIO;
4167 len = be32_to_cpup(p++);
4168 p = xdr_inline_decode(xdr, len);
4169 if (unlikely(!p))
4170 return -EIO;
4171 if (len < NFS4_MAXLABELLEN) {
4172 if (label) {
4173 if (label->len) {
4174 if (label->len < len)
4175 return -ERANGE;
4176 memcpy(label->label, p, len);
4177 }
4178 label->len = len;
4179 label->pi = pi;
4180 label->lfs = lfs;
4181 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4182 }
4183 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4184 } else
4185 printk(KERN_WARNING "%s: label too long (%u)!\n",
4186 __func__, len);
4187 }
4188 if (label && label->label)
4189 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4190 (char *)label->label, label->len, label->pi, label->lfs);
4191 return status;
4192 }
4193
4194 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4195 {
4196 int status = 0;
4197
4198 time->tv_sec = 0;
4199 time->tv_nsec = 0;
4200 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4201 return -EIO;
4202 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4203 status = decode_attr_time(xdr, time);
4204 if (status == 0)
4205 status = NFS_ATTR_FATTR_MTIME;
4206 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4207 }
4208 dprintk("%s: mtime=%lld\n", __func__, time->tv_sec);
4209 return status;
4210 }
4211
4212 static int decode_attr_xattrsupport(struct xdr_stream *xdr, uint32_t *bitmap,
4213 uint32_t *res)
4214 {
4215 __be32 *p;
4216
4217 *res = 0;
4218 if (unlikely(bitmap[2] & (FATTR4_WORD2_XATTR_SUPPORT - 1U)))
4219 return -EIO;
4220 if (likely(bitmap[2] & FATTR4_WORD2_XATTR_SUPPORT)) {
4221 p = xdr_inline_decode(xdr, 4);
4222 if (unlikely(!p))
4223 return -EIO;
4224 *res = be32_to_cpup(p);
4225 bitmap[2] &= ~FATTR4_WORD2_XATTR_SUPPORT;
4226 }
4227 dprintk("%s: XATTR support=%s\n", __func__,
4228 *res == 0 ? "false" : "true");
4229 return 0;
4230 }
4231
4232 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4233 {
4234 unsigned int attrwords = XDR_QUADLEN(attrlen);
4235 unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4236
4237 if (unlikely(attrwords != nwords)) {
4238 dprintk("%s: server returned incorrect attribute length: "
4239 "%u %c %u\n",
4240 __func__,
4241 attrwords << 2,
4242 (attrwords < nwords) ? '<' : '>',
4243 nwords << 2);
4244 return -EIO;
4245 }
4246 return 0;
4247 }
4248
4249 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4250 {
4251 __be32 *p;
4252
4253 p = xdr_inline_decode(xdr, 20);
4254 if (unlikely(!p))
4255 return -EIO;
4256 cinfo->atomic = be32_to_cpup(p++);
4257 p = xdr_decode_hyper(p, &cinfo->before);
4258 xdr_decode_hyper(p, &cinfo->after);
4259 return 0;
4260 }
4261
4262 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4263 {
4264 __be32 *p;
4265 uint32_t supp, acc;
4266 int status;
4267
4268 status = decode_op_hdr(xdr, OP_ACCESS);
4269 if (status)
4270 return status;
4271 p = xdr_inline_decode(xdr, 8);
4272 if (unlikely(!p))
4273 return -EIO;
4274 supp = be32_to_cpup(p++);
4275 acc = be32_to_cpup(p);
4276 *supported = supp;
4277 *access = acc;
4278 return 0;
4279 }
4280
4281 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4282 {
4283 ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4284 if (unlikely(ret < 0))
4285 return -EIO;
4286 return 0;
4287 }
4288
4289 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4290 {
4291 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4292 }
4293
4294 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4295 {
4296 stateid->type = NFS4_OPEN_STATEID_TYPE;
4297 return decode_stateid(xdr, stateid);
4298 }
4299
4300 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4301 {
4302 stateid->type = NFS4_LOCK_STATEID_TYPE;
4303 return decode_stateid(xdr, stateid);
4304 }
4305
4306 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4307 {
4308 stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4309 return decode_stateid(xdr, stateid);
4310 }
4311
4312 static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4313 {
4314 nfs4_stateid dummy;
4315
4316 nfs4_stateid_copy(stateid, &invalid_stateid);
4317 return decode_stateid(xdr, &dummy);
4318 }
4319
4320 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4321 {
4322 int status;
4323
4324 status = decode_op_hdr(xdr, OP_CLOSE);
4325 if (status != -EIO)
4326 nfs_increment_open_seqid(status, res->seqid);
4327 if (!status)
4328 status = decode_invalid_stateid(xdr, &res->stateid);
4329 return status;
4330 }
4331
4332 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4333 {
4334 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4335 }
4336
4337 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4338 {
4339 return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4340 }
4341
4342 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4343 {
4344 struct nfs_writeverf *verf = res->verf;
4345 int status;
4346
4347 status = decode_op_hdr(xdr, OP_COMMIT);
4348 if (!status)
4349 status = decode_write_verifier(xdr, &verf->verifier);
4350 if (!status)
4351 verf->committed = NFS_FILE_SYNC;
4352 return status;
4353 }
4354
4355 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4356 {
4357 __be32 *p;
4358 uint32_t bmlen;
4359 int status;
4360
4361 status = decode_op_hdr(xdr, OP_CREATE);
4362 if (status)
4363 return status;
4364 if ((status = decode_change_info(xdr, cinfo)))
4365 return status;
4366 p = xdr_inline_decode(xdr, 4);
4367 if (unlikely(!p))
4368 return -EIO;
4369 bmlen = be32_to_cpup(p);
4370 p = xdr_inline_decode(xdr, bmlen << 2);
4371 if (likely(p))
4372 return 0;
4373 return -EIO;
4374 }
4375
4376 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4377 {
4378 unsigned int savep;
4379 uint32_t attrlen, bitmap[3] = {0};
4380 int status;
4381
4382 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4383 goto xdr_error;
4384 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4385 goto xdr_error;
4386 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4387 goto xdr_error;
4388 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4389 goto xdr_error;
4390 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4391 &res->fh_expire_type)) != 0)
4392 goto xdr_error;
4393 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4394 goto xdr_error;
4395 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4396 goto xdr_error;
4397 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4398 goto xdr_error;
4399 if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4400 res->exclcreat_bitmask)) != 0)
4401 goto xdr_error;
4402 status = verify_attr_len(xdr, savep, attrlen);
4403 xdr_error:
4404 dprintk("%s: xdr returned %d!\n", __func__, -status);
4405 return status;
4406 }
4407
4408 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4409 {
4410 unsigned int savep;
4411 uint32_t attrlen, bitmap[3] = {0};
4412 int status;
4413
4414 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4415 goto xdr_error;
4416 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4417 goto xdr_error;
4418 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4419 goto xdr_error;
4420
4421 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4422 goto xdr_error;
4423 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4424 goto xdr_error;
4425 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4426 goto xdr_error;
4427
4428 status = -EIO;
4429 if (unlikely(bitmap[0]))
4430 goto xdr_error;
4431
4432 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4433 goto xdr_error;
4434 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4435 goto xdr_error;
4436 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4437 goto xdr_error;
4438
4439 status = verify_attr_len(xdr, savep, attrlen);
4440 xdr_error:
4441 dprintk("%s: xdr returned %d!\n", __func__, -status);
4442 return status;
4443 }
4444
4445 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4446 {
4447 unsigned int savep;
4448 uint32_t attrlen, bitmap[3] = {0};
4449 int status;
4450
4451 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4452 goto xdr_error;
4453 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4454 goto xdr_error;
4455 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4456 goto xdr_error;
4457
4458 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4459 goto xdr_error;
4460 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4461 goto xdr_error;
4462
4463 status = verify_attr_len(xdr, savep, attrlen);
4464 xdr_error:
4465 dprintk("%s: xdr returned %d!\n", __func__, -status);
4466 return status;
4467 }
4468
4469 static int decode_threshold_hint(struct xdr_stream *xdr,
4470 uint32_t *bitmap,
4471 uint64_t *res,
4472 uint32_t hint_bit)
4473 {
4474 __be32 *p;
4475
4476 *res = 0;
4477 if (likely(bitmap[0] & hint_bit)) {
4478 p = xdr_inline_decode(xdr, 8);
4479 if (unlikely(!p))
4480 return -EIO;
4481 xdr_decode_hyper(p, res);
4482 }
4483 return 0;
4484 }
4485
4486 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4487 struct nfs4_threshold *res)
4488 {
4489 __be32 *p;
4490 unsigned int savep;
4491 uint32_t bitmap[3] = {0,}, attrlen;
4492 int status;
4493
4494 /* layout type */
4495 p = xdr_inline_decode(xdr, 4);
4496 if (unlikely(!p))
4497 return -EIO;
4498 res->l_type = be32_to_cpup(p);
4499
4500 /* thi_hintset bitmap */
4501 status = decode_attr_bitmap(xdr, bitmap);
4502 if (status < 0)
4503 goto xdr_error;
4504
4505 /* thi_hintlist length */
4506 status = decode_attr_length(xdr, &attrlen, &savep);
4507 if (status < 0)
4508 goto xdr_error;
4509 /* thi_hintlist */
4510 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4511 if (status < 0)
4512 goto xdr_error;
4513 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4514 if (status < 0)
4515 goto xdr_error;
4516 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4517 THRESHOLD_RD_IO);
4518 if (status < 0)
4519 goto xdr_error;
4520 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4521 THRESHOLD_WR_IO);
4522 if (status < 0)
4523 goto xdr_error;
4524
4525 status = verify_attr_len(xdr, savep, attrlen);
4526 res->bm = bitmap[0];
4527
4528 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4529 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4530 res->wr_io_sz);
4531 xdr_error:
4532 dprintk("%s ret=%d!\n", __func__, status);
4533 return status;
4534 }
4535
4536 /*
4537 * Thresholds on pNFS direct I/O vrs MDS I/O
4538 */
4539 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4540 uint32_t *bitmap,
4541 struct nfs4_threshold *res)
4542 {
4543 __be32 *p;
4544 int status = 0;
4545 uint32_t num;
4546
4547 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4548 return -EIO;
4549 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4550 /* Did the server return an unrequested attribute? */
4551 if (unlikely(res == NULL))
4552 return -EREMOTEIO;
4553 p = xdr_inline_decode(xdr, 4);
4554 if (unlikely(!p))
4555 return -EIO;
4556 num = be32_to_cpup(p);
4557 if (num == 0)
4558 return 0;
4559 if (num > 1)
4560 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4561 "drivers per filesystem not supported\n",
4562 __func__);
4563
4564 status = decode_first_threshold_item4(xdr, res);
4565 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4566 }
4567 return status;
4568 }
4569
4570 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4571 struct nfs_fattr *fattr, struct nfs_fh *fh,
4572 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4573 const struct nfs_server *server)
4574 {
4575 int status;
4576 umode_t fmode = 0;
4577 uint32_t type;
4578 int32_t err;
4579
4580 status = decode_attr_type(xdr, bitmap, &type);
4581 if (status < 0)
4582 goto xdr_error;
4583 fattr->mode = 0;
4584 if (status != 0) {
4585 fattr->mode |= nfs_type2fmt[type];
4586 fattr->valid |= status;
4587 }
4588
4589 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4590 if (status < 0)
4591 goto xdr_error;
4592 fattr->valid |= status;
4593
4594 status = decode_attr_size(xdr, bitmap, &fattr->size);
4595 if (status < 0)
4596 goto xdr_error;
4597 fattr->valid |= status;
4598
4599 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4600 if (status < 0)
4601 goto xdr_error;
4602 fattr->valid |= status;
4603
4604 err = 0;
4605 status = decode_attr_error(xdr, bitmap, &err);
4606 if (status < 0)
4607 goto xdr_error;
4608
4609 status = decode_attr_filehandle(xdr, bitmap, fh);
4610 if (status < 0)
4611 goto xdr_error;
4612
4613 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4614 if (status < 0)
4615 goto xdr_error;
4616 fattr->valid |= status;
4617
4618 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4619 if (status < 0)
4620 goto xdr_error;
4621 fattr->valid |= status;
4622
4623 status = -EIO;
4624 if (unlikely(bitmap[0]))
4625 goto xdr_error;
4626
4627 status = decode_attr_mode(xdr, bitmap, &fmode);
4628 if (status < 0)
4629 goto xdr_error;
4630 if (status != 0) {
4631 fattr->mode |= fmode;
4632 fattr->valid |= status;
4633 }
4634
4635 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4636 if (status < 0)
4637 goto xdr_error;
4638 fattr->valid |= status;
4639
4640 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4641 if (status < 0)
4642 goto xdr_error;
4643 fattr->valid |= status;
4644
4645 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4646 if (status < 0)
4647 goto xdr_error;
4648 fattr->valid |= status;
4649
4650 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4651 if (status < 0)
4652 goto xdr_error;
4653 fattr->valid |= status;
4654
4655 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4656 if (status < 0)
4657 goto xdr_error;
4658 fattr->valid |= status;
4659
4660 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4661 if (status < 0)
4662 goto xdr_error;
4663 fattr->valid |= status;
4664
4665 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4666 if (status < 0)
4667 goto xdr_error;
4668 fattr->valid |= status;
4669
4670 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4671 if (status < 0)
4672 goto xdr_error;
4673 fattr->valid |= status;
4674
4675 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4676 if (status < 0)
4677 goto xdr_error;
4678 fattr->valid |= status;
4679
4680 status = -EIO;
4681 if (unlikely(bitmap[1]))
4682 goto xdr_error;
4683
4684 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4685 if (status < 0)
4686 goto xdr_error;
4687
4688 if (label) {
4689 status = decode_attr_security_label(xdr, bitmap, label);
4690 if (status < 0)
4691 goto xdr_error;
4692 fattr->valid |= status;
4693 }
4694
4695 xdr_error:
4696 dprintk("%s: xdr returned %d\n", __func__, -status);
4697 return status;
4698 }
4699
4700 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4701 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4702 struct nfs4_label *label, const struct nfs_server *server)
4703 {
4704 unsigned int savep;
4705 uint32_t attrlen,
4706 bitmap[3] = {0};
4707 int status;
4708
4709 status = decode_op_hdr(xdr, OP_GETATTR);
4710 if (status < 0)
4711 goto xdr_error;
4712
4713 status = decode_attr_bitmap(xdr, bitmap);
4714 if (status < 0)
4715 goto xdr_error;
4716
4717 status = decode_attr_length(xdr, &attrlen, &savep);
4718 if (status < 0)
4719 goto xdr_error;
4720
4721 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4722 label, server);
4723 if (status < 0)
4724 goto xdr_error;
4725
4726 status = verify_attr_len(xdr, savep, attrlen);
4727 xdr_error:
4728 dprintk("%s: xdr returned %d\n", __func__, -status);
4729 return status;
4730 }
4731
4732 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4733 struct nfs4_label *label, const struct nfs_server *server)
4734 {
4735 return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4736 }
4737
4738 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4739 const struct nfs_server *server)
4740 {
4741 return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4742 }
4743
4744 /*
4745 * Decode potentially multiple layout types.
4746 */
4747 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4748 struct nfs_fsinfo *fsinfo)
4749 {
4750 __be32 *p;
4751 uint32_t i;
4752
4753 p = xdr_inline_decode(xdr, 4);
4754 if (unlikely(!p))
4755 return -EIO;
4756 fsinfo->nlayouttypes = be32_to_cpup(p);
4757
4758 /* pNFS is not supported by the underlying file system */
4759 if (fsinfo->nlayouttypes == 0)
4760 return 0;
4761
4762 /* Decode and set first layout type, move xdr->p past unused types */
4763 p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4764 if (unlikely(!p))
4765 return -EIO;
4766
4767 /* If we get too many, then just cap it at the max */
4768 if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4769 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4770 __func__, fsinfo->nlayouttypes);
4771 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4772 }
4773
4774 for(i = 0; i < fsinfo->nlayouttypes; ++i)
4775 fsinfo->layouttype[i] = be32_to_cpup(p++);
4776 return 0;
4777 }
4778
4779 /*
4780 * The type of file system exported.
4781 * Note we must ensure that layouttype is set in any non-error case.
4782 */
4783 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4784 struct nfs_fsinfo *fsinfo)
4785 {
4786 int status = 0;
4787
4788 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4789 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4790 return -EIO;
4791 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4792 status = decode_pnfs_layout_types(xdr, fsinfo);
4793 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4794 }
4795 return status;
4796 }
4797
4798 /*
4799 * The prefered block size for layout directed io
4800 */
4801 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4802 uint32_t *res)
4803 {
4804 __be32 *p;
4805
4806 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4807 *res = 0;
4808 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4809 p = xdr_inline_decode(xdr, 4);
4810 if (unlikely(!p))
4811 return -EIO;
4812 *res = be32_to_cpup(p);
4813 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4814 }
4815 return 0;
4816 }
4817
4818 /*
4819 * The granularity of a CLONE operation.
4820 */
4821 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4822 uint32_t *res)
4823 {
4824 __be32 *p;
4825
4826 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4827 *res = 0;
4828 if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4829 p = xdr_inline_decode(xdr, 4);
4830 if (unlikely(!p))
4831 return -EIO;
4832 *res = be32_to_cpup(p);
4833 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4834 }
4835 return 0;
4836 }
4837
4838 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4839 {
4840 unsigned int savep;
4841 uint32_t attrlen, bitmap[3];
4842 int status;
4843
4844 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4845 goto xdr_error;
4846 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4847 goto xdr_error;
4848 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4849 goto xdr_error;
4850
4851 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4852
4853 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4854 goto xdr_error;
4855 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4856 goto xdr_error;
4857 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4858 goto xdr_error;
4859 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4860 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4861 goto xdr_error;
4862 fsinfo->wtpref = fsinfo->wtmax;
4863
4864 status = -EIO;
4865 if (unlikely(bitmap[0]))
4866 goto xdr_error;
4867
4868 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4869 if (status != 0)
4870 goto xdr_error;
4871 status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4872 if (status != 0)
4873 goto xdr_error;
4874
4875 status = -EIO;
4876 if (unlikely(bitmap[1]))
4877 goto xdr_error;
4878
4879 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4880 if (status)
4881 goto xdr_error;
4882 status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4883 if (status)
4884 goto xdr_error;
4885
4886 status = decode_attr_xattrsupport(xdr, bitmap,
4887 &fsinfo->xattr_support);
4888 if (status)
4889 goto xdr_error;
4890
4891 status = verify_attr_len(xdr, savep, attrlen);
4892 xdr_error:
4893 dprintk("%s: xdr returned %d!\n", __func__, -status);
4894 return status;
4895 }
4896
4897 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4898 {
4899 __be32 *p;
4900 uint32_t len;
4901 int status;
4902
4903 /* Zero handle first to allow comparisons */
4904 memset(fh, 0, sizeof(*fh));
4905
4906 status = decode_op_hdr(xdr, OP_GETFH);
4907 if (status)
4908 return status;
4909
4910 p = xdr_inline_decode(xdr, 4);
4911 if (unlikely(!p))
4912 return -EIO;
4913 len = be32_to_cpup(p);
4914 if (len > NFS4_FHSIZE)
4915 return -EIO;
4916 fh->size = len;
4917 p = xdr_inline_decode(xdr, len);
4918 if (unlikely(!p))
4919 return -EIO;
4920 memcpy(fh->data, p, len);
4921 return 0;
4922 }
4923
4924 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4925 {
4926 int status;
4927
4928 status = decode_op_hdr(xdr, OP_LINK);
4929 if (status)
4930 return status;
4931 return decode_change_info(xdr, cinfo);
4932 }
4933
4934 /*
4935 * We create the owner, so we know a proper owner.id length is 4.
4936 */
4937 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4938 {
4939 uint64_t offset, length, clientid;
4940 __be32 *p;
4941 uint32_t namelen, type;
4942
4943 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4944 if (unlikely(!p))
4945 return -EIO;
4946 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4947 p = xdr_decode_hyper(p, &length);
4948 type = be32_to_cpup(p++); /* 4 byte read */
4949 if (fl != NULL) { /* manipulate file lock */
4950 fl->fl_start = (loff_t)offset;
4951 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4952 if (length == ~(uint64_t)0)
4953 fl->fl_end = OFFSET_MAX;
4954 fl->fl_type = F_WRLCK;
4955 if (type & 1)
4956 fl->fl_type = F_RDLCK;
4957 fl->fl_pid = 0;
4958 }
4959 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4960 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4961 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4962 if (likely(!p))
4963 return -EIO;
4964 return -NFS4ERR_DENIED;
4965 }
4966
4967 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4968 {
4969 int status;
4970
4971 status = decode_op_hdr(xdr, OP_LOCK);
4972 if (status == -EIO)
4973 goto out;
4974 if (status == 0) {
4975 status = decode_lock_stateid(xdr, &res->stateid);
4976 if (unlikely(status))
4977 goto out;
4978 } else if (status == -NFS4ERR_DENIED)
4979 status = decode_lock_denied(xdr, NULL);
4980 if (res->open_seqid != NULL)
4981 nfs_increment_open_seqid(status, res->open_seqid);
4982 nfs_increment_lock_seqid(status, res->lock_seqid);
4983 out:
4984 return status;
4985 }
4986
4987 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4988 {
4989 int status;
4990 status = decode_op_hdr(xdr, OP_LOCKT);
4991 if (status == -NFS4ERR_DENIED)
4992 return decode_lock_denied(xdr, res->denied);
4993 return status;
4994 }
4995
4996 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4997 {
4998 int status;
4999
5000 status = decode_op_hdr(xdr, OP_LOCKU);
5001 if (status != -EIO)
5002 nfs_increment_lock_seqid(status, res->seqid);
5003 if (status == 0)
5004 status = decode_lock_stateid(xdr, &res->stateid);
5005 return status;
5006 }
5007
5008 static int decode_release_lockowner(struct xdr_stream *xdr)
5009 {
5010 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5011 }
5012
5013 static int decode_lookup(struct xdr_stream *xdr)
5014 {
5015 return decode_op_hdr(xdr, OP_LOOKUP);
5016 }
5017
5018 static int decode_lookupp(struct xdr_stream *xdr)
5019 {
5020 return decode_op_hdr(xdr, OP_LOOKUPP);
5021 }
5022
5023 /* This is too sick! */
5024 static int decode_space_limit(struct xdr_stream *xdr,
5025 unsigned long *pagemod_limit)
5026 {
5027 __be32 *p;
5028 uint32_t limit_type, nblocks, blocksize;
5029 u64 maxsize = 0;
5030
5031 p = xdr_inline_decode(xdr, 12);
5032 if (unlikely(!p))
5033 return -EIO;
5034 limit_type = be32_to_cpup(p++);
5035 switch (limit_type) {
5036 case NFS4_LIMIT_SIZE:
5037 xdr_decode_hyper(p, &maxsize);
5038 break;
5039 case NFS4_LIMIT_BLOCKS:
5040 nblocks = be32_to_cpup(p++);
5041 blocksize = be32_to_cpup(p);
5042 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5043 }
5044 maxsize >>= PAGE_SHIFT;
5045 *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5046 return 0;
5047 }
5048
5049 static int decode_rw_delegation(struct xdr_stream *xdr,
5050 uint32_t delegation_type,
5051 struct nfs_openres *res)
5052 {
5053 __be32 *p;
5054 int status;
5055
5056 status = decode_delegation_stateid(xdr, &res->delegation);
5057 if (unlikely(status))
5058 return status;
5059 p = xdr_inline_decode(xdr, 4);
5060 if (unlikely(!p))
5061 return -EIO;
5062 res->do_recall = be32_to_cpup(p);
5063
5064 switch (delegation_type) {
5065 case NFS4_OPEN_DELEGATE_READ:
5066 res->delegation_type = FMODE_READ;
5067 break;
5068 case NFS4_OPEN_DELEGATE_WRITE:
5069 res->delegation_type = FMODE_WRITE|FMODE_READ;
5070 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5071 return -EIO;
5072 }
5073 return decode_ace(xdr, NULL);
5074 }
5075
5076 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5077 {
5078 __be32 *p;
5079 uint32_t why_no_delegation;
5080
5081 p = xdr_inline_decode(xdr, 4);
5082 if (unlikely(!p))
5083 return -EIO;
5084 why_no_delegation = be32_to_cpup(p);
5085 switch (why_no_delegation) {
5086 case WND4_CONTENTION:
5087 case WND4_RESOURCE:
5088 xdr_inline_decode(xdr, 4);
5089 /* Ignore for now */
5090 }
5091 return 0;
5092 }
5093
5094 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5095 {
5096 __be32 *p;
5097 uint32_t delegation_type;
5098
5099 p = xdr_inline_decode(xdr, 4);
5100 if (unlikely(!p))
5101 return -EIO;
5102 delegation_type = be32_to_cpup(p);
5103 res->delegation_type = 0;
5104 switch (delegation_type) {
5105 case NFS4_OPEN_DELEGATE_NONE:
5106 return 0;
5107 case NFS4_OPEN_DELEGATE_READ:
5108 case NFS4_OPEN_DELEGATE_WRITE:
5109 return decode_rw_delegation(xdr, delegation_type, res);
5110 case NFS4_OPEN_DELEGATE_NONE_EXT:
5111 return decode_no_delegation(xdr, res);
5112 }
5113 return -EIO;
5114 }
5115
5116 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5117 {
5118 __be32 *p;
5119 uint32_t savewords, bmlen, i;
5120 int status;
5121
5122 if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5123 return status;
5124 nfs_increment_open_seqid(status, res->seqid);
5125 if (status)
5126 return status;
5127 status = decode_open_stateid(xdr, &res->stateid);
5128 if (unlikely(status))
5129 return status;
5130
5131 decode_change_info(xdr, &res->cinfo);
5132
5133 p = xdr_inline_decode(xdr, 8);
5134 if (unlikely(!p))
5135 return -EIO;
5136 res->rflags = be32_to_cpup(p++);
5137 bmlen = be32_to_cpup(p);
5138 if (bmlen > 10)
5139 goto xdr_error;
5140
5141 p = xdr_inline_decode(xdr, bmlen << 2);
5142 if (unlikely(!p))
5143 return -EIO;
5144 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5145 for (i = 0; i < savewords; ++i)
5146 res->attrset[i] = be32_to_cpup(p++);
5147 for (; i < NFS4_BITMAP_SIZE; i++)
5148 res->attrset[i] = 0;
5149
5150 return decode_delegation(xdr, res);
5151 xdr_error:
5152 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5153 return -EIO;
5154 }
5155
5156 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5157 {
5158 int status;
5159
5160 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5161 if (status != -EIO)
5162 nfs_increment_open_seqid(status, res->seqid);
5163 if (!status)
5164 status = decode_open_stateid(xdr, &res->stateid);
5165 return status;
5166 }
5167
5168 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5169 {
5170 int status;
5171
5172 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5173 if (status != -EIO)
5174 nfs_increment_open_seqid(status, res->seqid);
5175 if (!status)
5176 status = decode_open_stateid(xdr, &res->stateid);
5177 return status;
5178 }
5179
5180 static int decode_putfh(struct xdr_stream *xdr)
5181 {
5182 return decode_op_hdr(xdr, OP_PUTFH);
5183 }
5184
5185 static int decode_putrootfh(struct xdr_stream *xdr)
5186 {
5187 return decode_op_hdr(xdr, OP_PUTROOTFH);
5188 }
5189
5190 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5191 struct nfs_pgio_res *res)
5192 {
5193 __be32 *p;
5194 uint32_t count, eof, recvd;
5195 int status;
5196
5197 status = decode_op_hdr(xdr, OP_READ);
5198 if (status)
5199 return status;
5200 p = xdr_inline_decode(xdr, 8);
5201 if (unlikely(!p))
5202 return -EIO;
5203 eof = be32_to_cpup(p++);
5204 count = be32_to_cpup(p);
5205 recvd = xdr_read_pages(xdr, count);
5206 if (count > recvd) {
5207 dprintk("NFS: server cheating in read reply: "
5208 "count %u > recvd %u\n", count, recvd);
5209 count = recvd;
5210 eof = 0;
5211 }
5212 res->eof = eof;
5213 res->count = count;
5214 return 0;
5215 }
5216
5217 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5218 {
5219 int status;
5220 __be32 verf[2];
5221
5222 status = decode_op_hdr(xdr, OP_READDIR);
5223 if (!status)
5224 status = decode_verifier(xdr, readdir->verifier.data);
5225 if (unlikely(status))
5226 return status;
5227 memcpy(verf, readdir->verifier.data, sizeof(verf));
5228 dprintk("%s: verifier = %08x:%08x\n",
5229 __func__, verf[0], verf[1]);
5230 return xdr_read_pages(xdr, xdr->buf->page_len);
5231 }
5232
5233 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5234 {
5235 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5236 u32 len, recvd;
5237 __be32 *p;
5238 int status;
5239
5240 status = decode_op_hdr(xdr, OP_READLINK);
5241 if (status)
5242 return status;
5243
5244 /* Convert length of symlink */
5245 p = xdr_inline_decode(xdr, 4);
5246 if (unlikely(!p))
5247 return -EIO;
5248 len = be32_to_cpup(p);
5249 if (len >= rcvbuf->page_len || len <= 0) {
5250 dprintk("nfs: server returned giant symlink!\n");
5251 return -ENAMETOOLONG;
5252 }
5253 recvd = xdr_read_pages(xdr, len);
5254 if (recvd < len) {
5255 dprintk("NFS: server cheating in readlink reply: "
5256 "count %u > recvd %u\n", len, recvd);
5257 return -EIO;
5258 }
5259 /*
5260 * The XDR encode routine has set things up so that
5261 * the link text will be copied directly into the
5262 * buffer. We just have to do overflow-checking,
5263 * and null-terminate the text (the VFS expects
5264 * null-termination).
5265 */
5266 xdr_terminate_string(rcvbuf, len);
5267 return 0;
5268 }
5269
5270 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5271 {
5272 int status;
5273
5274 status = decode_op_hdr(xdr, OP_REMOVE);
5275 if (status)
5276 goto out;
5277 status = decode_change_info(xdr, cinfo);
5278 out:
5279 return status;
5280 }
5281
5282 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5283 struct nfs4_change_info *new_cinfo)
5284 {
5285 int status;
5286
5287 status = decode_op_hdr(xdr, OP_RENAME);
5288 if (status)
5289 goto out;
5290 if ((status = decode_change_info(xdr, old_cinfo)))
5291 goto out;
5292 status = decode_change_info(xdr, new_cinfo);
5293 out:
5294 return status;
5295 }
5296
5297 static int decode_renew(struct xdr_stream *xdr)
5298 {
5299 return decode_op_hdr(xdr, OP_RENEW);
5300 }
5301
5302 static int
5303 decode_restorefh(struct xdr_stream *xdr)
5304 {
5305 return decode_op_hdr(xdr, OP_RESTOREFH);
5306 }
5307
5308 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5309 struct nfs_getaclres *res)
5310 {
5311 unsigned int savep;
5312 uint32_t attrlen,
5313 bitmap[3] = {0};
5314 int status;
5315
5316 res->acl_len = 0;
5317 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5318 goto out;
5319
5320 xdr_enter_page(xdr, xdr->buf->page_len);
5321
5322 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5323 goto out;
5324 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5325 goto out;
5326
5327 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5328 return -EIO;
5329 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5330
5331 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5332 * are stored with the acl data to handle the problem of
5333 * variable length bitmaps.*/
5334 res->acl_data_offset = xdr_page_pos(xdr);
5335 res->acl_len = attrlen;
5336
5337 /* Check for receive buffer overflow */
5338 if (res->acl_len > (xdr->nwords << 2) ||
5339 res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5340 res->acl_flags |= NFS4_ACL_TRUNC;
5341 dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5342 attrlen, xdr->nwords << 2);
5343 }
5344 } else
5345 status = -EOPNOTSUPP;
5346
5347 out:
5348 return status;
5349 }
5350
5351 static int
5352 decode_savefh(struct xdr_stream *xdr)
5353 {
5354 return decode_op_hdr(xdr, OP_SAVEFH);
5355 }
5356
5357 static int decode_setattr(struct xdr_stream *xdr)
5358 {
5359 int status;
5360
5361 status = decode_op_hdr(xdr, OP_SETATTR);
5362 if (status)
5363 return status;
5364 if (decode_bitmap4(xdr, NULL, 0) >= 0)
5365 return 0;
5366 return -EIO;
5367 }
5368
5369 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5370 {
5371 __be32 *p;
5372 uint32_t opnum;
5373 int32_t nfserr;
5374
5375 p = xdr_inline_decode(xdr, 8);
5376 if (unlikely(!p))
5377 return -EIO;
5378 opnum = be32_to_cpup(p++);
5379 if (opnum != OP_SETCLIENTID) {
5380 dprintk("nfs: decode_setclientid: Server returned operation"
5381 " %d\n", opnum);
5382 return -EIO;
5383 }
5384 nfserr = be32_to_cpup(p);
5385 if (nfserr == NFS_OK) {
5386 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5387 if (unlikely(!p))
5388 return -EIO;
5389 p = xdr_decode_hyper(p, &res->clientid);
5390 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5391 } else if (nfserr == NFSERR_CLID_INUSE) {
5392 uint32_t len;
5393
5394 /* skip netid string */
5395 p = xdr_inline_decode(xdr, 4);
5396 if (unlikely(!p))
5397 return -EIO;
5398 len = be32_to_cpup(p);
5399 p = xdr_inline_decode(xdr, len);
5400 if (unlikely(!p))
5401 return -EIO;
5402
5403 /* skip uaddr string */
5404 p = xdr_inline_decode(xdr, 4);
5405 if (unlikely(!p))
5406 return -EIO;
5407 len = be32_to_cpup(p);
5408 p = xdr_inline_decode(xdr, len);
5409 if (unlikely(!p))
5410 return -EIO;
5411 return -NFSERR_CLID_INUSE;
5412 } else
5413 return nfs4_stat_to_errno(nfserr);
5414
5415 return 0;
5416 }
5417
5418 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5419 {
5420 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5421 }
5422
5423 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5424 {
5425 __be32 *p;
5426 int status;
5427
5428 status = decode_op_hdr(xdr, OP_WRITE);
5429 if (status)
5430 return status;
5431
5432 p = xdr_inline_decode(xdr, 8);
5433 if (unlikely(!p))
5434 return -EIO;
5435 res->count = be32_to_cpup(p++);
5436 res->verf->committed = be32_to_cpup(p++);
5437 return decode_write_verifier(xdr, &res->verf->verifier);
5438 }
5439
5440 static int decode_delegreturn(struct xdr_stream *xdr)
5441 {
5442 return decode_op_hdr(xdr, OP_DELEGRETURN);
5443 }
5444
5445 static int decode_secinfo_gss(struct xdr_stream *xdr,
5446 struct nfs4_secinfo4 *flavor)
5447 {
5448 u32 oid_len;
5449 __be32 *p;
5450
5451 p = xdr_inline_decode(xdr, 4);
5452 if (unlikely(!p))
5453 return -EIO;
5454 oid_len = be32_to_cpup(p);
5455 if (oid_len > GSS_OID_MAX_LEN)
5456 return -EINVAL;
5457
5458 p = xdr_inline_decode(xdr, oid_len);
5459 if (unlikely(!p))
5460 return -EIO;
5461 memcpy(flavor->flavor_info.oid.data, p, oid_len);
5462 flavor->flavor_info.oid.len = oid_len;
5463
5464 p = xdr_inline_decode(xdr, 8);
5465 if (unlikely(!p))
5466 return -EIO;
5467 flavor->flavor_info.qop = be32_to_cpup(p++);
5468 flavor->flavor_info.service = be32_to_cpup(p);
5469
5470 return 0;
5471 }
5472
5473 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5474 {
5475 struct nfs4_secinfo4 *sec_flavor;
5476 unsigned int i, num_flavors;
5477 int status;
5478 __be32 *p;
5479
5480 p = xdr_inline_decode(xdr, 4);
5481 if (unlikely(!p))
5482 return -EIO;
5483
5484 res->flavors->num_flavors = 0;
5485 num_flavors = be32_to_cpup(p);
5486
5487 for (i = 0; i < num_flavors; i++) {
5488 sec_flavor = &res->flavors->flavors[i];
5489 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5490 break;
5491
5492 p = xdr_inline_decode(xdr, 4);
5493 if (unlikely(!p))
5494 return -EIO;
5495 sec_flavor->flavor = be32_to_cpup(p);
5496
5497 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5498 status = decode_secinfo_gss(xdr, sec_flavor);
5499 if (status)
5500 goto out;
5501 }
5502 res->flavors->num_flavors++;
5503 }
5504
5505 status = 0;
5506 out:
5507 return status;
5508 }
5509
5510 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5511 {
5512 int status = decode_op_hdr(xdr, OP_SECINFO);
5513 if (status)
5514 return status;
5515 return decode_secinfo_common(xdr, res);
5516 }
5517
5518 #if defined(CONFIG_NFS_V4_1)
5519 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5520 {
5521 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5522 if (status)
5523 return status;
5524 return decode_secinfo_common(xdr, res);
5525 }
5526
5527 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5528 {
5529 __be32 *p;
5530 uint32_t bitmap_words;
5531 unsigned int i;
5532
5533 p = xdr_inline_decode(xdr, 4);
5534 if (!p)
5535 return -EIO;
5536 bitmap_words = be32_to_cpup(p++);
5537 if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5538 return -EIO;
5539 p = xdr_inline_decode(xdr, 4 * bitmap_words);
5540 for (i = 0; i < bitmap_words; i++)
5541 op_map->u.words[i] = be32_to_cpup(p++);
5542
5543 return 0;
5544 }
5545
5546 static int decode_exchange_id(struct xdr_stream *xdr,
5547 struct nfs41_exchange_id_res *res)
5548 {
5549 __be32 *p;
5550 uint32_t dummy;
5551 char *dummy_str;
5552 int status;
5553 uint32_t impl_id_count;
5554
5555 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5556 if (status)
5557 return status;
5558
5559 p = xdr_inline_decode(xdr, 8);
5560 if (unlikely(!p))
5561 return -EIO;
5562 xdr_decode_hyper(p, &res->clientid);
5563 p = xdr_inline_decode(xdr, 12);
5564 if (unlikely(!p))
5565 return -EIO;
5566 res->seqid = be32_to_cpup(p++);
5567 res->flags = be32_to_cpup(p++);
5568
5569 res->state_protect.how = be32_to_cpup(p);
5570 switch (res->state_protect.how) {
5571 case SP4_NONE:
5572 break;
5573 case SP4_MACH_CRED:
5574 status = decode_op_map(xdr, &res->state_protect.enforce);
5575 if (status)
5576 return status;
5577 status = decode_op_map(xdr, &res->state_protect.allow);
5578 if (status)
5579 return status;
5580 break;
5581 default:
5582 WARN_ON_ONCE(1);
5583 return -EIO;
5584 }
5585
5586 /* server_owner4.so_minor_id */
5587 p = xdr_inline_decode(xdr, 8);
5588 if (unlikely(!p))
5589 return -EIO;
5590 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5591
5592 /* server_owner4.so_major_id */
5593 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5594 if (unlikely(status))
5595 return status;
5596 memcpy(res->server_owner->major_id, dummy_str, dummy);
5597 res->server_owner->major_id_sz = dummy;
5598
5599 /* server_scope4 */
5600 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5601 if (unlikely(status))
5602 return status;
5603 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5604 res->server_scope->server_scope_sz = dummy;
5605
5606 /* Implementation Id */
5607 p = xdr_inline_decode(xdr, 4);
5608 if (unlikely(!p))
5609 return -EIO;
5610 impl_id_count = be32_to_cpup(p++);
5611
5612 if (impl_id_count) {
5613 /* nii_domain */
5614 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5615 if (unlikely(status))
5616 return status;
5617 memcpy(res->impl_id->domain, dummy_str, dummy);
5618
5619 /* nii_name */
5620 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5621 if (unlikely(status))
5622 return status;
5623 memcpy(res->impl_id->name, dummy_str, dummy);
5624
5625 /* nii_date */
5626 p = xdr_inline_decode(xdr, 12);
5627 if (unlikely(!p))
5628 return -EIO;
5629 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5630 res->impl_id->date.nseconds = be32_to_cpup(p);
5631
5632 /* if there's more than one entry, ignore the rest */
5633 }
5634 return 0;
5635 }
5636
5637 static int decode_chan_attrs(struct xdr_stream *xdr,
5638 struct nfs4_channel_attrs *attrs)
5639 {
5640 __be32 *p;
5641 u32 nr_attrs, val;
5642
5643 p = xdr_inline_decode(xdr, 28);
5644 if (unlikely(!p))
5645 return -EIO;
5646 val = be32_to_cpup(p++); /* headerpadsz */
5647 if (val)
5648 return -EINVAL; /* no support for header padding yet */
5649 attrs->max_rqst_sz = be32_to_cpup(p++);
5650 attrs->max_resp_sz = be32_to_cpup(p++);
5651 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5652 attrs->max_ops = be32_to_cpup(p++);
5653 attrs->max_reqs = be32_to_cpup(p++);
5654 nr_attrs = be32_to_cpup(p);
5655 if (unlikely(nr_attrs > 1)) {
5656 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5657 "count %u\n", __func__, nr_attrs);
5658 return -EINVAL;
5659 }
5660 if (nr_attrs == 1) {
5661 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5662 if (unlikely(!p))
5663 return -EIO;
5664 }
5665 return 0;
5666 }
5667
5668 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5669 {
5670 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5671 }
5672
5673 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5674 struct nfs41_bind_conn_to_session_res *res)
5675 {
5676 __be32 *p;
5677 int status;
5678
5679 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5680 if (!status)
5681 status = decode_sessionid(xdr, &res->sessionid);
5682 if (unlikely(status))
5683 return status;
5684
5685 /* dir flags, rdma mode bool */
5686 p = xdr_inline_decode(xdr, 8);
5687 if (unlikely(!p))
5688 return -EIO;
5689
5690 res->dir = be32_to_cpup(p++);
5691 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5692 return -EIO;
5693 if (be32_to_cpup(p) == 0)
5694 res->use_conn_in_rdma_mode = false;
5695 else
5696 res->use_conn_in_rdma_mode = true;
5697
5698 return 0;
5699 }
5700
5701 static int decode_create_session(struct xdr_stream *xdr,
5702 struct nfs41_create_session_res *res)
5703 {
5704 __be32 *p;
5705 int status;
5706
5707 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5708 if (!status)
5709 status = decode_sessionid(xdr, &res->sessionid);
5710 if (unlikely(status))
5711 return status;
5712
5713 /* seqid, flags */
5714 p = xdr_inline_decode(xdr, 8);
5715 if (unlikely(!p))
5716 return -EIO;
5717 res->seqid = be32_to_cpup(p++);
5718 res->flags = be32_to_cpup(p);
5719
5720 /* Channel attributes */
5721 status = decode_chan_attrs(xdr, &res->fc_attrs);
5722 if (!status)
5723 status = decode_chan_attrs(xdr, &res->bc_attrs);
5724 return status;
5725 }
5726
5727 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5728 {
5729 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5730 }
5731
5732 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5733 {
5734 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5735 }
5736
5737 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5738 {
5739 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5740 }
5741 #endif /* CONFIG_NFS_V4_1 */
5742
5743 static int decode_sequence(struct xdr_stream *xdr,
5744 struct nfs4_sequence_res *res,
5745 struct rpc_rqst *rqstp)
5746 {
5747 #if defined(CONFIG_NFS_V4_1)
5748 struct nfs4_session *session;
5749 struct nfs4_sessionid id;
5750 u32 dummy;
5751 int status;
5752 __be32 *p;
5753
5754 if (res->sr_slot == NULL)
5755 return 0;
5756 if (!res->sr_slot->table->session)
5757 return 0;
5758
5759 status = decode_op_hdr(xdr, OP_SEQUENCE);
5760 if (!status)
5761 status = decode_sessionid(xdr, &id);
5762 if (unlikely(status))
5763 goto out_err;
5764
5765 /*
5766 * If the server returns different values for sessionID, slotID or
5767 * sequence number, the server is looney tunes.
5768 */
5769 status = -EREMOTEIO;
5770 session = res->sr_slot->table->session;
5771
5772 if (memcmp(id.data, session->sess_id.data,
5773 NFS4_MAX_SESSIONID_LEN)) {
5774 dprintk("%s Invalid session id\n", __func__);
5775 goto out_err;
5776 }
5777
5778 p = xdr_inline_decode(xdr, 20);
5779 if (unlikely(!p))
5780 goto out_overflow;
5781
5782 /* seqid */
5783 dummy = be32_to_cpup(p++);
5784 if (dummy != res->sr_slot->seq_nr) {
5785 dprintk("%s Invalid sequence number\n", __func__);
5786 goto out_err;
5787 }
5788 /* slot id */
5789 dummy = be32_to_cpup(p++);
5790 if (dummy != res->sr_slot->slot_nr) {
5791 dprintk("%s Invalid slot id\n", __func__);
5792 goto out_err;
5793 }
5794 /* highest slot id */
5795 res->sr_highest_slotid = be32_to_cpup(p++);
5796 /* target highest slot id */
5797 res->sr_target_highest_slotid = be32_to_cpup(p++);
5798 /* result flags */
5799 res->sr_status_flags = be32_to_cpup(p);
5800 status = 0;
5801 out_err:
5802 res->sr_status = status;
5803 return status;
5804 out_overflow:
5805 status = -EIO;
5806 goto out_err;
5807 #else /* CONFIG_NFS_V4_1 */
5808 return 0;
5809 #endif /* CONFIG_NFS_V4_1 */
5810 }
5811
5812 #if defined(CONFIG_NFS_V4_1)
5813 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5814 {
5815 stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5816 return decode_stateid(xdr, stateid);
5817 }
5818
5819 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5820 struct nfs4_getdeviceinfo_res *res)
5821 {
5822 struct pnfs_device *pdev = res->pdev;
5823 __be32 *p;
5824 uint32_t len, type;
5825 int status;
5826
5827 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5828 if (status) {
5829 if (status == -ETOOSMALL) {
5830 p = xdr_inline_decode(xdr, 4);
5831 if (unlikely(!p))
5832 return -EIO;
5833 pdev->mincount = be32_to_cpup(p);
5834 dprintk("%s: Min count too small. mincnt = %u\n",
5835 __func__, pdev->mincount);
5836 }
5837 return status;
5838 }
5839
5840 p = xdr_inline_decode(xdr, 8);
5841 if (unlikely(!p))
5842 return -EIO;
5843 type = be32_to_cpup(p++);
5844 if (type != pdev->layout_type) {
5845 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5846 __func__, pdev->layout_type, type);
5847 return -EINVAL;
5848 }
5849 /*
5850 * Get the length of the opaque device_addr4. xdr_read_pages places
5851 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5852 * and places the remaining xdr data in xdr_buf->tail
5853 */
5854 pdev->mincount = be32_to_cpup(p);
5855 if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5856 return -EIO;
5857
5858 /* Parse notification bitmap, verifying that it is zero. */
5859 p = xdr_inline_decode(xdr, 4);
5860 if (unlikely(!p))
5861 return -EIO;
5862 len = be32_to_cpup(p);
5863 if (len) {
5864 uint32_t i;
5865
5866 p = xdr_inline_decode(xdr, 4 * len);
5867 if (unlikely(!p))
5868 return -EIO;
5869
5870 res->notification = be32_to_cpup(p++);
5871 for (i = 1; i < len; i++) {
5872 if (be32_to_cpup(p++)) {
5873 dprintk("%s: unsupported notification\n",
5874 __func__);
5875 return -EIO;
5876 }
5877 }
5878 }
5879 return 0;
5880 }
5881
5882 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5883 struct nfs4_layoutget_res *res)
5884 {
5885 __be32 *p;
5886 int status;
5887 u32 layout_count;
5888 u32 recvd;
5889
5890 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5891 if (status)
5892 goto out;
5893 p = xdr_inline_decode(xdr, 4);
5894 if (unlikely(!p))
5895 goto out_overflow;
5896 res->return_on_close = be32_to_cpup(p);
5897 decode_layout_stateid(xdr, &res->stateid);
5898 p = xdr_inline_decode(xdr, 4);
5899 if (unlikely(!p))
5900 goto out_overflow;
5901 layout_count = be32_to_cpup(p);
5902 if (!layout_count) {
5903 dprintk("%s: server responded with empty layout array\n",
5904 __func__);
5905 status = -EINVAL;
5906 goto out;
5907 }
5908
5909 p = xdr_inline_decode(xdr, 28);
5910 if (unlikely(!p))
5911 goto out_overflow;
5912 p = xdr_decode_hyper(p, &res->range.offset);
5913 p = xdr_decode_hyper(p, &res->range.length);
5914 res->range.iomode = be32_to_cpup(p++);
5915 res->type = be32_to_cpup(p++);
5916 res->layoutp->len = be32_to_cpup(p);
5917
5918 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5919 __func__,
5920 (unsigned long)res->range.offset,
5921 (unsigned long)res->range.length,
5922 res->range.iomode,
5923 res->type,
5924 res->layoutp->len);
5925
5926 recvd = xdr_read_pages(xdr, res->layoutp->len);
5927 if (res->layoutp->len > recvd) {
5928 dprintk("NFS: server cheating in layoutget reply: "
5929 "layout len %u > recvd %u\n",
5930 res->layoutp->len, recvd);
5931 status = -EINVAL;
5932 goto out;
5933 }
5934
5935 if (layout_count > 1) {
5936 /* We only handle a length one array at the moment. Any
5937 * further entries are just ignored. Note that this means
5938 * the client may see a response that is less than the
5939 * minimum it requested.
5940 */
5941 dprintk("%s: server responded with %d layouts, dropping tail\n",
5942 __func__, layout_count);
5943 }
5944
5945 out:
5946 res->status = status;
5947 return status;
5948 out_overflow:
5949 status = -EIO;
5950 goto out;
5951 }
5952
5953 static int decode_layoutreturn(struct xdr_stream *xdr,
5954 struct nfs4_layoutreturn_res *res)
5955 {
5956 __be32 *p;
5957 int status;
5958
5959 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5960 if (status)
5961 return status;
5962 p = xdr_inline_decode(xdr, 4);
5963 if (unlikely(!p))
5964 return -EIO;
5965 res->lrs_present = be32_to_cpup(p);
5966 if (res->lrs_present)
5967 status = decode_layout_stateid(xdr, &res->stateid);
5968 else
5969 nfs4_stateid_copy(&res->stateid, &invalid_stateid);
5970 return status;
5971 }
5972
5973 static int decode_layoutcommit(struct xdr_stream *xdr,
5974 struct rpc_rqst *req,
5975 struct nfs4_layoutcommit_res *res)
5976 {
5977 __be32 *p;
5978 __u32 sizechanged;
5979 int status;
5980
5981 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5982 res->status = status;
5983 if (status)
5984 return status;
5985
5986 p = xdr_inline_decode(xdr, 4);
5987 if (unlikely(!p))
5988 return -EIO;
5989 sizechanged = be32_to_cpup(p);
5990
5991 if (sizechanged) {
5992 /* throw away new size */
5993 p = xdr_inline_decode(xdr, 8);
5994 if (unlikely(!p))
5995 return -EIO;
5996 }
5997 return 0;
5998 }
5999
6000 static int decode_test_stateid(struct xdr_stream *xdr,
6001 struct nfs41_test_stateid_res *res)
6002 {
6003 __be32 *p;
6004 int status;
6005 int num_res;
6006
6007 status = decode_op_hdr(xdr, OP_TEST_STATEID);
6008 if (status)
6009 return status;
6010
6011 p = xdr_inline_decode(xdr, 4);
6012 if (unlikely(!p))
6013 return -EIO;
6014 num_res = be32_to_cpup(p++);
6015 if (num_res != 1)
6016 return -EIO;
6017
6018 p = xdr_inline_decode(xdr, 4);
6019 if (unlikely(!p))
6020 return -EIO;
6021 res->status = be32_to_cpup(p++);
6022
6023 return status;
6024 }
6025
6026 static int decode_free_stateid(struct xdr_stream *xdr,
6027 struct nfs41_free_stateid_res *res)
6028 {
6029 res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6030 return res->status;
6031 }
6032 #else
6033 static inline
6034 int decode_layoutreturn(struct xdr_stream *xdr,
6035 struct nfs4_layoutreturn_res *res)
6036 {
6037 return 0;
6038 }
6039
6040 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6041 struct nfs4_layoutget_res *res)
6042 {
6043 return 0;
6044 }
6045
6046 #endif /* CONFIG_NFS_V4_1 */
6047
6048 /*
6049 * END OF "GENERIC" DECODE ROUTINES.
6050 */
6051
6052 /*
6053 * Decode OPEN_DOWNGRADE response
6054 */
6055 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6056 struct xdr_stream *xdr,
6057 void *data)
6058 {
6059 struct nfs_closeres *res = data;
6060 struct compound_hdr hdr;
6061 int status;
6062
6063 status = decode_compound_hdr(xdr, &hdr);
6064 if (status)
6065 goto out;
6066 status = decode_sequence(xdr, &res->seq_res, rqstp);
6067 if (status)
6068 goto out;
6069 status = decode_putfh(xdr);
6070 if (status)
6071 goto out;
6072 if (res->lr_res) {
6073 status = decode_layoutreturn(xdr, res->lr_res);
6074 res->lr_ret = status;
6075 if (status)
6076 goto out;
6077 }
6078 status = decode_open_downgrade(xdr, res);
6079 out:
6080 return status;
6081 }
6082
6083 /*
6084 * Decode ACCESS response
6085 */
6086 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6087 void *data)
6088 {
6089 struct nfs4_accessres *res = data;
6090 struct compound_hdr hdr;
6091 int status;
6092
6093 status = decode_compound_hdr(xdr, &hdr);
6094 if (status)
6095 goto out;
6096 status = decode_sequence(xdr, &res->seq_res, rqstp);
6097 if (status)
6098 goto out;
6099 status = decode_putfh(xdr);
6100 if (status != 0)
6101 goto out;
6102 status = decode_access(xdr, &res->supported, &res->access);
6103 if (status != 0)
6104 goto out;
6105 if (res->fattr)
6106 decode_getfattr(xdr, res->fattr, res->server);
6107 out:
6108 return status;
6109 }
6110
6111 /*
6112 * Decode LOOKUP response
6113 */
6114 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6115 void *data)
6116 {
6117 struct nfs4_lookup_res *res = data;
6118 struct compound_hdr hdr;
6119 int status;
6120
6121 status = decode_compound_hdr(xdr, &hdr);
6122 if (status)
6123 goto out;
6124 status = decode_sequence(xdr, &res->seq_res, rqstp);
6125 if (status)
6126 goto out;
6127 status = decode_putfh(xdr);
6128 if (status)
6129 goto out;
6130 status = decode_lookup(xdr);
6131 if (status)
6132 goto out;
6133 status = decode_getfh(xdr, res->fh);
6134 if (status)
6135 goto out;
6136 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6137 out:
6138 return status;
6139 }
6140
6141 /*
6142 * Decode LOOKUPP response
6143 */
6144 static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6145 void *data)
6146 {
6147 struct nfs4_lookupp_res *res = data;
6148 struct compound_hdr hdr;
6149 int status;
6150
6151 status = decode_compound_hdr(xdr, &hdr);
6152 if (status)
6153 goto out;
6154 status = decode_sequence(xdr, &res->seq_res, rqstp);
6155 if (status)
6156 goto out;
6157 status = decode_putfh(xdr);
6158 if (status)
6159 goto out;
6160 status = decode_lookupp(xdr);
6161 if (status)
6162 goto out;
6163 status = decode_getfh(xdr, res->fh);
6164 if (status)
6165 goto out;
6166 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6167 out:
6168 return status;
6169 }
6170
6171 /*
6172 * Decode LOOKUP_ROOT response
6173 */
6174 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6175 struct xdr_stream *xdr,
6176 void *data)
6177 {
6178 struct nfs4_lookup_res *res = data;
6179 struct compound_hdr hdr;
6180 int status;
6181
6182 status = decode_compound_hdr(xdr, &hdr);
6183 if (status)
6184 goto out;
6185 status = decode_sequence(xdr, &res->seq_res, rqstp);
6186 if (status)
6187 goto out;
6188 status = decode_putrootfh(xdr);
6189 if (status)
6190 goto out;
6191 status = decode_getfh(xdr, res->fh);
6192 if (status == 0)
6193 status = decode_getfattr_label(xdr, res->fattr,
6194 res->label, res->server);
6195 out:
6196 return status;
6197 }
6198
6199 /*
6200 * Decode REMOVE response
6201 */
6202 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6203 void *data)
6204 {
6205 struct nfs_removeres *res = data;
6206 struct compound_hdr hdr;
6207 int status;
6208
6209 status = decode_compound_hdr(xdr, &hdr);
6210 if (status)
6211 goto out;
6212 status = decode_sequence(xdr, &res->seq_res, rqstp);
6213 if (status)
6214 goto out;
6215 status = decode_putfh(xdr);
6216 if (status)
6217 goto out;
6218 status = decode_remove(xdr, &res->cinfo);
6219 out:
6220 return status;
6221 }
6222
6223 /*
6224 * Decode RENAME response
6225 */
6226 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6227 void *data)
6228 {
6229 struct nfs_renameres *res = data;
6230 struct compound_hdr hdr;
6231 int status;
6232
6233 status = decode_compound_hdr(xdr, &hdr);
6234 if (status)
6235 goto out;
6236 status = decode_sequence(xdr, &res->seq_res, rqstp);
6237 if (status)
6238 goto out;
6239 status = decode_putfh(xdr);
6240 if (status)
6241 goto out;
6242 status = decode_savefh(xdr);
6243 if (status)
6244 goto out;
6245 status = decode_putfh(xdr);
6246 if (status)
6247 goto out;
6248 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6249 out:
6250 return status;
6251 }
6252
6253 /*
6254 * Decode LINK response
6255 */
6256 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6257 void *data)
6258 {
6259 struct nfs4_link_res *res = data;
6260 struct compound_hdr hdr;
6261 int status;
6262
6263 status = decode_compound_hdr(xdr, &hdr);
6264 if (status)
6265 goto out;
6266 status = decode_sequence(xdr, &res->seq_res, rqstp);
6267 if (status)
6268 goto out;
6269 status = decode_putfh(xdr);
6270 if (status)
6271 goto out;
6272 status = decode_savefh(xdr);
6273 if (status)
6274 goto out;
6275 status = decode_putfh(xdr);
6276 if (status)
6277 goto out;
6278 status = decode_link(xdr, &res->cinfo);
6279 if (status)
6280 goto out;
6281 /*
6282 * Note order: OP_LINK leaves the directory as the current
6283 * filehandle.
6284 */
6285 status = decode_restorefh(xdr);
6286 if (status)
6287 goto out;
6288 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6289 out:
6290 return status;
6291 }
6292
6293 /*
6294 * Decode CREATE response
6295 */
6296 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6297 void *data)
6298 {
6299 struct nfs4_create_res *res = data;
6300 struct compound_hdr hdr;
6301 int status;
6302
6303 status = decode_compound_hdr(xdr, &hdr);
6304 if (status)
6305 goto out;
6306 status = decode_sequence(xdr, &res->seq_res, rqstp);
6307 if (status)
6308 goto out;
6309 status = decode_putfh(xdr);
6310 if (status)
6311 goto out;
6312 status = decode_create(xdr, &res->dir_cinfo);
6313 if (status)
6314 goto out;
6315 status = decode_getfh(xdr, res->fh);
6316 if (status)
6317 goto out;
6318 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6319 out:
6320 return status;
6321 }
6322
6323 /*
6324 * Decode SYMLINK response
6325 */
6326 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6327 void *res)
6328 {
6329 return nfs4_xdr_dec_create(rqstp, xdr, res);
6330 }
6331
6332 /*
6333 * Decode GETATTR response
6334 */
6335 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6336 void *data)
6337 {
6338 struct nfs4_getattr_res *res = data;
6339 struct compound_hdr hdr;
6340 int status;
6341
6342 status = decode_compound_hdr(xdr, &hdr);
6343 if (status)
6344 goto out;
6345 status = decode_sequence(xdr, &res->seq_res, rqstp);
6346 if (status)
6347 goto out;
6348 status = decode_putfh(xdr);
6349 if (status)
6350 goto out;
6351 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6352 out:
6353 return status;
6354 }
6355
6356 /*
6357 * Encode an SETACL request
6358 */
6359 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6360 const void *data)
6361 {
6362 const struct nfs_setaclargs *args = data;
6363 struct compound_hdr hdr = {
6364 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6365 };
6366
6367 encode_compound_hdr(xdr, req, &hdr);
6368 encode_sequence(xdr, &args->seq_args, &hdr);
6369 encode_putfh(xdr, args->fh, &hdr);
6370 encode_setacl(xdr, args, &hdr);
6371 encode_nops(&hdr);
6372 }
6373
6374 /*
6375 * Decode SETACL response
6376 */
6377 static int
6378 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6379 void *data)
6380 {
6381 struct nfs_setaclres *res = data;
6382 struct compound_hdr hdr;
6383 int status;
6384
6385 status = decode_compound_hdr(xdr, &hdr);
6386 if (status)
6387 goto out;
6388 status = decode_sequence(xdr, &res->seq_res, rqstp);
6389 if (status)
6390 goto out;
6391 status = decode_putfh(xdr);
6392 if (status)
6393 goto out;
6394 status = decode_setattr(xdr);
6395 out:
6396 return status;
6397 }
6398
6399 /*
6400 * Decode GETACL response
6401 */
6402 static int
6403 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6404 void *data)
6405 {
6406 struct nfs_getaclres *res = data;
6407 struct compound_hdr hdr;
6408 int status;
6409
6410 if (res->acl_scratch != NULL) {
6411 void *p = page_address(res->acl_scratch);
6412 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6413 }
6414 status = decode_compound_hdr(xdr, &hdr);
6415 if (status)
6416 goto out;
6417 status = decode_sequence(xdr, &res->seq_res, rqstp);
6418 if (status)
6419 goto out;
6420 status = decode_putfh(xdr);
6421 if (status)
6422 goto out;
6423 status = decode_getacl(xdr, rqstp, res);
6424
6425 out:
6426 return status;
6427 }
6428
6429 /*
6430 * Decode CLOSE response
6431 */
6432 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6433 void *data)
6434 {
6435 struct nfs_closeres *res = data;
6436 struct compound_hdr hdr;
6437 int status;
6438
6439 status = decode_compound_hdr(xdr, &hdr);
6440 if (status)
6441 goto out;
6442 status = decode_sequence(xdr, &res->seq_res, rqstp);
6443 if (status)
6444 goto out;
6445 status = decode_putfh(xdr);
6446 if (status)
6447 goto out;
6448 if (res->lr_res) {
6449 status = decode_layoutreturn(xdr, res->lr_res);
6450 res->lr_ret = status;
6451 if (status)
6452 goto out;
6453 }
6454 if (res->fattr != NULL) {
6455 status = decode_getfattr(xdr, res->fattr, res->server);
6456 if (status != 0)
6457 goto out;
6458 }
6459 status = decode_close(xdr, res);
6460 out:
6461 return status;
6462 }
6463
6464 /*
6465 * Decode OPEN response
6466 */
6467 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6468 void *data)
6469 {
6470 struct nfs_openres *res = data;
6471 struct compound_hdr hdr;
6472 int status;
6473
6474 status = decode_compound_hdr(xdr, &hdr);
6475 if (status)
6476 goto out;
6477 status = decode_sequence(xdr, &res->seq_res, rqstp);
6478 if (status)
6479 goto out;
6480 status = decode_putfh(xdr);
6481 if (status)
6482 goto out;
6483 status = decode_open(xdr, res);
6484 if (status)
6485 goto out;
6486 status = decode_getfh(xdr, &res->fh);
6487 if (status)
6488 goto out;
6489 if (res->access_request)
6490 decode_access(xdr, &res->access_supported, &res->access_result);
6491 decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6492 if (res->lg_res)
6493 decode_layoutget(xdr, rqstp, res->lg_res);
6494 out:
6495 return status;
6496 }
6497
6498 /*
6499 * Decode OPEN_CONFIRM response
6500 */
6501 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6502 struct xdr_stream *xdr,
6503 void *data)
6504 {
6505 struct nfs_open_confirmres *res = data;
6506 struct compound_hdr hdr;
6507 int status;
6508
6509 status = decode_compound_hdr(xdr, &hdr);
6510 if (status)
6511 goto out;
6512 status = decode_putfh(xdr);
6513 if (status)
6514 goto out;
6515 status = decode_open_confirm(xdr, res);
6516 out:
6517 return status;
6518 }
6519
6520 /*
6521 * Decode OPEN response
6522 */
6523 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6524 struct xdr_stream *xdr,
6525 void *data)
6526 {
6527 struct nfs_openres *res = data;
6528 struct compound_hdr hdr;
6529 int status;
6530
6531 status = decode_compound_hdr(xdr, &hdr);
6532 if (status)
6533 goto out;
6534 status = decode_sequence(xdr, &res->seq_res, rqstp);
6535 if (status)
6536 goto out;
6537 status = decode_putfh(xdr);
6538 if (status)
6539 goto out;
6540 status = decode_open(xdr, res);
6541 if (status)
6542 goto out;
6543 if (res->access_request)
6544 decode_access(xdr, &res->access_supported, &res->access_result);
6545 decode_getfattr(xdr, res->f_attr, res->server);
6546 if (res->lg_res)
6547 decode_layoutget(xdr, rqstp, res->lg_res);
6548 out:
6549 return status;
6550 }
6551
6552 /*
6553 * Decode SETATTR response
6554 */
6555 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6556 struct xdr_stream *xdr,
6557 void *data)
6558 {
6559 struct nfs_setattrres *res = data;
6560 struct compound_hdr hdr;
6561 int status;
6562
6563 status = decode_compound_hdr(xdr, &hdr);
6564 if (status)
6565 goto out;
6566 status = decode_sequence(xdr, &res->seq_res, rqstp);
6567 if (status)
6568 goto out;
6569 status = decode_putfh(xdr);
6570 if (status)
6571 goto out;
6572 status = decode_setattr(xdr);
6573 if (status)
6574 goto out;
6575 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6576 out:
6577 return status;
6578 }
6579
6580 /*
6581 * Decode LOCK response
6582 */
6583 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6584 void *data)
6585 {
6586 struct nfs_lock_res *res = data;
6587 struct compound_hdr hdr;
6588 int status;
6589
6590 status = decode_compound_hdr(xdr, &hdr);
6591 if (status)
6592 goto out;
6593 status = decode_sequence(xdr, &res->seq_res, rqstp);
6594 if (status)
6595 goto out;
6596 status = decode_putfh(xdr);
6597 if (status)
6598 goto out;
6599 status = decode_lock(xdr, res);
6600 out:
6601 return status;
6602 }
6603
6604 /*
6605 * Decode LOCKT response
6606 */
6607 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6608 void *data)
6609 {
6610 struct nfs_lockt_res *res = data;
6611 struct compound_hdr hdr;
6612 int status;
6613
6614 status = decode_compound_hdr(xdr, &hdr);
6615 if (status)
6616 goto out;
6617 status = decode_sequence(xdr, &res->seq_res, rqstp);
6618 if (status)
6619 goto out;
6620 status = decode_putfh(xdr);
6621 if (status)
6622 goto out;
6623 status = decode_lockt(xdr, res);
6624 out:
6625 return status;
6626 }
6627
6628 /*
6629 * Decode LOCKU response
6630 */
6631 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6632 void *data)
6633 {
6634 struct nfs_locku_res *res = data;
6635 struct compound_hdr hdr;
6636 int status;
6637
6638 status = decode_compound_hdr(xdr, &hdr);
6639 if (status)
6640 goto out;
6641 status = decode_sequence(xdr, &res->seq_res, rqstp);
6642 if (status)
6643 goto out;
6644 status = decode_putfh(xdr);
6645 if (status)
6646 goto out;
6647 status = decode_locku(xdr, res);
6648 out:
6649 return status;
6650 }
6651
6652 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6653 struct xdr_stream *xdr, void *dummy)
6654 {
6655 struct compound_hdr hdr;
6656 int status;
6657
6658 status = decode_compound_hdr(xdr, &hdr);
6659 if (!status)
6660 status = decode_release_lockowner(xdr);
6661 return status;
6662 }
6663
6664 /*
6665 * Decode READLINK response
6666 */
6667 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6668 struct xdr_stream *xdr,
6669 void *data)
6670 {
6671 struct nfs4_readlink_res *res = data;
6672 struct compound_hdr hdr;
6673 int status;
6674
6675 status = decode_compound_hdr(xdr, &hdr);
6676 if (status)
6677 goto out;
6678 status = decode_sequence(xdr, &res->seq_res, rqstp);
6679 if (status)
6680 goto out;
6681 status = decode_putfh(xdr);
6682 if (status)
6683 goto out;
6684 status = decode_readlink(xdr, rqstp);
6685 out:
6686 return status;
6687 }
6688
6689 /*
6690 * Decode READDIR response
6691 */
6692 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6693 void *data)
6694 {
6695 struct nfs4_readdir_res *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_readdir(xdr, rqstp, res);
6709 out:
6710 return status;
6711 }
6712
6713 /*
6714 * Decode Read response
6715 */
6716 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6717 void *data)
6718 {
6719 struct nfs_pgio_res *res = data;
6720 struct compound_hdr hdr;
6721 int status;
6722
6723 status = decode_compound_hdr(xdr, &hdr);
6724 res->op_status = hdr.status;
6725 if (status)
6726 goto out;
6727 status = decode_sequence(xdr, &res->seq_res, rqstp);
6728 if (status)
6729 goto out;
6730 status = decode_putfh(xdr);
6731 if (status)
6732 goto out;
6733 status = decode_read(xdr, rqstp, res);
6734 if (!status)
6735 status = res->count;
6736 out:
6737 return status;
6738 }
6739
6740 /*
6741 * Decode WRITE response
6742 */
6743 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6744 void *data)
6745 {
6746 struct nfs_pgio_res *res = data;
6747 struct compound_hdr hdr;
6748 int status;
6749
6750 status = decode_compound_hdr(xdr, &hdr);
6751 res->op_status = hdr.status;
6752 if (status)
6753 goto out;
6754 status = decode_sequence(xdr, &res->seq_res, rqstp);
6755 if (status)
6756 goto out;
6757 status = decode_putfh(xdr);
6758 if (status)
6759 goto out;
6760 status = decode_write(xdr, res);
6761 if (status)
6762 goto out;
6763 if (res->fattr)
6764 decode_getfattr(xdr, res->fattr, res->server);
6765 if (!status)
6766 status = res->count;
6767 out:
6768 return status;
6769 }
6770
6771 /*
6772 * Decode COMMIT response
6773 */
6774 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6775 void *data)
6776 {
6777 struct nfs_commitres *res = data;
6778 struct compound_hdr hdr;
6779 int status;
6780
6781 status = decode_compound_hdr(xdr, &hdr);
6782 res->op_status = hdr.status;
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_commit(xdr, res);
6792 out:
6793 return status;
6794 }
6795
6796 /*
6797 * Decode FSINFO response
6798 */
6799 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6800 void *data)
6801 {
6802 struct nfs4_fsinfo_res *res = data;
6803 struct compound_hdr hdr;
6804 int status;
6805
6806 status = decode_compound_hdr(xdr, &hdr);
6807 if (!status)
6808 status = decode_sequence(xdr, &res->seq_res, req);
6809 if (!status)
6810 status = decode_putfh(xdr);
6811 if (!status)
6812 status = decode_fsinfo(xdr, res->fsinfo);
6813 return status;
6814 }
6815
6816 /*
6817 * Decode PATHCONF response
6818 */
6819 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6820 void *data)
6821 {
6822 struct nfs4_pathconf_res *res = data;
6823 struct compound_hdr hdr;
6824 int status;
6825
6826 status = decode_compound_hdr(xdr, &hdr);
6827 if (!status)
6828 status = decode_sequence(xdr, &res->seq_res, req);
6829 if (!status)
6830 status = decode_putfh(xdr);
6831 if (!status)
6832 status = decode_pathconf(xdr, res->pathconf);
6833 return status;
6834 }
6835
6836 /*
6837 * Decode STATFS response
6838 */
6839 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6840 void *data)
6841 {
6842 struct nfs4_statfs_res *res = data;
6843 struct compound_hdr hdr;
6844 int status;
6845
6846 status = decode_compound_hdr(xdr, &hdr);
6847 if (!status)
6848 status = decode_sequence(xdr, &res->seq_res, req);
6849 if (!status)
6850 status = decode_putfh(xdr);
6851 if (!status)
6852 status = decode_statfs(xdr, res->fsstat);
6853 return status;
6854 }
6855
6856 /*
6857 * Decode GETATTR_BITMAP response
6858 */
6859 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6860 struct xdr_stream *xdr,
6861 void *data)
6862 {
6863 struct nfs4_server_caps_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, req);
6871 if (status)
6872 goto out;
6873 status = decode_putfh(xdr);
6874 if (status)
6875 goto out;
6876 status = decode_server_caps(xdr, res);
6877 out:
6878 return status;
6879 }
6880
6881 /*
6882 * Decode RENEW response
6883 */
6884 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6885 void *__unused)
6886 {
6887 struct compound_hdr hdr;
6888 int status;
6889
6890 status = decode_compound_hdr(xdr, &hdr);
6891 if (!status)
6892 status = decode_renew(xdr);
6893 return status;
6894 }
6895
6896 /*
6897 * Decode SETCLIENTID response
6898 */
6899 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6900 struct xdr_stream *xdr,
6901 void *data)
6902 {
6903 struct nfs4_setclientid_res *res = data;
6904 struct compound_hdr hdr;
6905 int status;
6906
6907 status = decode_compound_hdr(xdr, &hdr);
6908 if (!status)
6909 status = decode_setclientid(xdr, res);
6910 return status;
6911 }
6912
6913 /*
6914 * Decode SETCLIENTID_CONFIRM response
6915 */
6916 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6917 struct xdr_stream *xdr,
6918 void *data)
6919 {
6920 struct compound_hdr hdr;
6921 int status;
6922
6923 status = decode_compound_hdr(xdr, &hdr);
6924 if (!status)
6925 status = decode_setclientid_confirm(xdr);
6926 return status;
6927 }
6928
6929 /*
6930 * Decode DELEGRETURN response
6931 */
6932 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6933 struct xdr_stream *xdr,
6934 void *data)
6935 {
6936 struct nfs4_delegreturnres *res = data;
6937 struct compound_hdr hdr;
6938 int status;
6939
6940 status = decode_compound_hdr(xdr, &hdr);
6941 if (status)
6942 goto out;
6943 status = decode_sequence(xdr, &res->seq_res, rqstp);
6944 if (status)
6945 goto out;
6946 status = decode_putfh(xdr);
6947 if (status != 0)
6948 goto out;
6949 if (res->lr_res) {
6950 status = decode_layoutreturn(xdr, res->lr_res);
6951 res->lr_ret = status;
6952 if (status)
6953 goto out;
6954 }
6955 if (res->fattr) {
6956 status = decode_getfattr(xdr, res->fattr, res->server);
6957 if (status != 0)
6958 goto out;
6959 }
6960 status = decode_delegreturn(xdr);
6961 out:
6962 return status;
6963 }
6964
6965 /*
6966 * Decode FS_LOCATIONS response
6967 */
6968 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6969 struct xdr_stream *xdr,
6970 void *data)
6971 {
6972 struct nfs4_fs_locations_res *res = data;
6973 struct compound_hdr hdr;
6974 int status;
6975
6976 status = decode_compound_hdr(xdr, &hdr);
6977 if (status)
6978 goto out;
6979 status = decode_sequence(xdr, &res->seq_res, req);
6980 if (status)
6981 goto out;
6982 status = decode_putfh(xdr);
6983 if (status)
6984 goto out;
6985 if (res->migration) {
6986 xdr_enter_page(xdr, PAGE_SIZE);
6987 status = decode_getfattr_generic(xdr,
6988 &res->fs_locations->fattr,
6989 NULL, res->fs_locations,
6990 NULL, res->fs_locations->server);
6991 if (status)
6992 goto out;
6993 if (res->renew)
6994 status = decode_renew(xdr);
6995 } else {
6996 status = decode_lookup(xdr);
6997 if (status)
6998 goto out;
6999 xdr_enter_page(xdr, PAGE_SIZE);
7000 status = decode_getfattr_generic(xdr,
7001 &res->fs_locations->fattr,
7002 NULL, res->fs_locations,
7003 NULL, res->fs_locations->server);
7004 }
7005 out:
7006 return status;
7007 }
7008
7009 /*
7010 * Decode SECINFO response
7011 */
7012 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7013 struct xdr_stream *xdr,
7014 void *data)
7015 {
7016 struct nfs4_secinfo_res *res = data;
7017 struct compound_hdr hdr;
7018 int status;
7019
7020 status = decode_compound_hdr(xdr, &hdr);
7021 if (status)
7022 goto out;
7023 status = decode_sequence(xdr, &res->seq_res, rqstp);
7024 if (status)
7025 goto out;
7026 status = decode_putfh(xdr);
7027 if (status)
7028 goto out;
7029 status = decode_secinfo(xdr, res);
7030 out:
7031 return status;
7032 }
7033
7034 /*
7035 * Decode FSID_PRESENT response
7036 */
7037 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7038 struct xdr_stream *xdr,
7039 void *data)
7040 {
7041 struct nfs4_fsid_present_res *res = data;
7042 struct compound_hdr hdr;
7043 int status;
7044
7045 status = decode_compound_hdr(xdr, &hdr);
7046 if (status)
7047 goto out;
7048 status = decode_sequence(xdr, &res->seq_res, rqstp);
7049 if (status)
7050 goto out;
7051 status = decode_putfh(xdr);
7052 if (status)
7053 goto out;
7054 status = decode_getfh(xdr, res->fh);
7055 if (status)
7056 goto out;
7057 if (res->renew)
7058 status = decode_renew(xdr);
7059 out:
7060 return status;
7061 }
7062
7063 #if defined(CONFIG_NFS_V4_1)
7064 /*
7065 * Decode BIND_CONN_TO_SESSION response
7066 */
7067 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7068 struct xdr_stream *xdr,
7069 void *res)
7070 {
7071 struct compound_hdr hdr;
7072 int status;
7073
7074 status = decode_compound_hdr(xdr, &hdr);
7075 if (!status)
7076 status = decode_bind_conn_to_session(xdr, res);
7077 return status;
7078 }
7079
7080 /*
7081 * Decode EXCHANGE_ID response
7082 */
7083 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7084 struct xdr_stream *xdr,
7085 void *res)
7086 {
7087 struct compound_hdr hdr;
7088 int status;
7089
7090 status = decode_compound_hdr(xdr, &hdr);
7091 if (!status)
7092 status = decode_exchange_id(xdr, res);
7093 return status;
7094 }
7095
7096 /*
7097 * Decode CREATE_SESSION response
7098 */
7099 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7100 struct xdr_stream *xdr,
7101 void *res)
7102 {
7103 struct compound_hdr hdr;
7104 int status;
7105
7106 status = decode_compound_hdr(xdr, &hdr);
7107 if (!status)
7108 status = decode_create_session(xdr, res);
7109 return status;
7110 }
7111
7112 /*
7113 * Decode DESTROY_SESSION response
7114 */
7115 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7116 struct xdr_stream *xdr,
7117 void *res)
7118 {
7119 struct compound_hdr hdr;
7120 int status;
7121
7122 status = decode_compound_hdr(xdr, &hdr);
7123 if (!status)
7124 status = decode_destroy_session(xdr, res);
7125 return status;
7126 }
7127
7128 /*
7129 * Decode DESTROY_CLIENTID response
7130 */
7131 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7132 struct xdr_stream *xdr,
7133 void *res)
7134 {
7135 struct compound_hdr hdr;
7136 int status;
7137
7138 status = decode_compound_hdr(xdr, &hdr);
7139 if (!status)
7140 status = decode_destroy_clientid(xdr, res);
7141 return status;
7142 }
7143
7144 /*
7145 * Decode SEQUENCE response
7146 */
7147 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7148 struct xdr_stream *xdr,
7149 void *res)
7150 {
7151 struct compound_hdr hdr;
7152 int status;
7153
7154 status = decode_compound_hdr(xdr, &hdr);
7155 if (!status)
7156 status = decode_sequence(xdr, res, rqstp);
7157 return status;
7158 }
7159
7160 #endif
7161
7162 /*
7163 * Decode GET_LEASE_TIME response
7164 */
7165 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7166 struct xdr_stream *xdr,
7167 void *data)
7168 {
7169 struct nfs4_get_lease_time_res *res = data;
7170 struct compound_hdr hdr;
7171 int status;
7172
7173 status = decode_compound_hdr(xdr, &hdr);
7174 if (!status)
7175 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7176 if (!status)
7177 status = decode_putrootfh(xdr);
7178 if (!status)
7179 status = decode_fsinfo(xdr, res->lr_fsinfo);
7180 return status;
7181 }
7182
7183 #ifdef CONFIG_NFS_V4_1
7184
7185 /*
7186 * Decode RECLAIM_COMPLETE response
7187 */
7188 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7189 struct xdr_stream *xdr,
7190 void *data)
7191 {
7192 struct nfs41_reclaim_complete_res *res = data;
7193 struct compound_hdr hdr;
7194 int status;
7195
7196 status = decode_compound_hdr(xdr, &hdr);
7197 if (!status)
7198 status = decode_sequence(xdr, &res->seq_res, rqstp);
7199 if (!status)
7200 status = decode_reclaim_complete(xdr, NULL);
7201 return status;
7202 }
7203
7204 /*
7205 * Decode GETDEVINFO response
7206 */
7207 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7208 struct xdr_stream *xdr,
7209 void *data)
7210 {
7211 struct nfs4_getdeviceinfo_res *res = data;
7212 struct compound_hdr hdr;
7213 int status;
7214
7215 status = decode_compound_hdr(xdr, &hdr);
7216 if (status != 0)
7217 goto out;
7218 status = decode_sequence(xdr, &res->seq_res, rqstp);
7219 if (status != 0)
7220 goto out;
7221 status = decode_getdeviceinfo(xdr, res);
7222 out:
7223 return status;
7224 }
7225
7226 /*
7227 * Decode LAYOUTGET response
7228 */
7229 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7230 struct xdr_stream *xdr,
7231 void *data)
7232 {
7233 struct nfs4_layoutget_res *res = data;
7234 struct compound_hdr hdr;
7235 int status;
7236
7237 status = decode_compound_hdr(xdr, &hdr);
7238 if (status)
7239 goto out;
7240 status = decode_sequence(xdr, &res->seq_res, rqstp);
7241 if (status)
7242 goto out;
7243 status = decode_putfh(xdr);
7244 if (status)
7245 goto out;
7246 status = decode_layoutget(xdr, rqstp, res);
7247 out:
7248 return status;
7249 }
7250
7251 /*
7252 * Decode LAYOUTRETURN response
7253 */
7254 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7255 struct xdr_stream *xdr,
7256 void *data)
7257 {
7258 struct nfs4_layoutreturn_res *res = data;
7259 struct compound_hdr hdr;
7260 int status;
7261
7262 status = decode_compound_hdr(xdr, &hdr);
7263 if (status)
7264 goto out;
7265 status = decode_sequence(xdr, &res->seq_res, rqstp);
7266 if (status)
7267 goto out;
7268 status = decode_putfh(xdr);
7269 if (status)
7270 goto out;
7271 status = decode_layoutreturn(xdr, res);
7272 out:
7273 return status;
7274 }
7275
7276 /*
7277 * Decode LAYOUTCOMMIT response
7278 */
7279 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7280 struct xdr_stream *xdr,
7281 void *data)
7282 {
7283 struct nfs4_layoutcommit_res *res = data;
7284 struct compound_hdr hdr;
7285 int status;
7286
7287 status = decode_compound_hdr(xdr, &hdr);
7288 if (status)
7289 goto out;
7290 status = decode_sequence(xdr, &res->seq_res, rqstp);
7291 if (status)
7292 goto out;
7293 status = decode_putfh(xdr);
7294 if (status)
7295 goto out;
7296 status = decode_layoutcommit(xdr, rqstp, res);
7297 if (status)
7298 goto out;
7299 decode_getfattr(xdr, res->fattr, res->server);
7300 out:
7301 return status;
7302 }
7303
7304 /*
7305 * Decode SECINFO_NO_NAME response
7306 */
7307 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7308 struct xdr_stream *xdr,
7309 void *data)
7310 {
7311 struct nfs4_secinfo_res *res = data;
7312 struct compound_hdr hdr;
7313 int status;
7314
7315 status = decode_compound_hdr(xdr, &hdr);
7316 if (status)
7317 goto out;
7318 status = decode_sequence(xdr, &res->seq_res, rqstp);
7319 if (status)
7320 goto out;
7321 status = decode_putrootfh(xdr);
7322 if (status)
7323 goto out;
7324 status = decode_secinfo_no_name(xdr, res);
7325 out:
7326 return status;
7327 }
7328
7329 /*
7330 * Decode TEST_STATEID response
7331 */
7332 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7333 struct xdr_stream *xdr,
7334 void *data)
7335 {
7336 struct nfs41_test_stateid_res *res = data;
7337 struct compound_hdr hdr;
7338 int status;
7339
7340 status = decode_compound_hdr(xdr, &hdr);
7341 if (status)
7342 goto out;
7343 status = decode_sequence(xdr, &res->seq_res, rqstp);
7344 if (status)
7345 goto out;
7346 status = decode_test_stateid(xdr, res);
7347 out:
7348 return status;
7349 }
7350
7351 /*
7352 * Decode FREE_STATEID response
7353 */
7354 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7355 struct xdr_stream *xdr,
7356 void *data)
7357 {
7358 struct nfs41_free_stateid_res *res = data;
7359 struct compound_hdr hdr;
7360 int status;
7361
7362 status = decode_compound_hdr(xdr, &hdr);
7363 if (status)
7364 goto out;
7365 status = decode_sequence(xdr, &res->seq_res, rqstp);
7366 if (status)
7367 goto out;
7368 status = decode_free_stateid(xdr, res);
7369 out:
7370 return status;
7371 }
7372 #endif /* CONFIG_NFS_V4_1 */
7373
7374 /**
7375 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7376 * the local page cache.
7377 * @xdr: XDR stream where entry resides
7378 * @entry: buffer to fill in with entry data
7379 * @plus: boolean indicating whether this should be a readdirplus entry
7380 *
7381 * Returns zero if successful, otherwise a negative errno value is
7382 * returned.
7383 *
7384 * This function is not invoked during READDIR reply decoding, but
7385 * rather whenever an application invokes the getdents(2) system call
7386 * on a directory already in our cache.
7387 */
7388 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7389 bool plus)
7390 {
7391 unsigned int savep;
7392 uint32_t bitmap[3] = {0};
7393 uint32_t len;
7394 uint64_t new_cookie;
7395 __be32 *p = xdr_inline_decode(xdr, 4);
7396 if (unlikely(!p))
7397 return -EAGAIN;
7398 if (*p == xdr_zero) {
7399 p = xdr_inline_decode(xdr, 4);
7400 if (unlikely(!p))
7401 return -EAGAIN;
7402 if (*p == xdr_zero)
7403 return -EAGAIN;
7404 entry->eof = 1;
7405 return -EBADCOOKIE;
7406 }
7407
7408 p = xdr_inline_decode(xdr, 12);
7409 if (unlikely(!p))
7410 return -EAGAIN;
7411 p = xdr_decode_hyper(p, &new_cookie);
7412 entry->len = be32_to_cpup(p);
7413
7414 p = xdr_inline_decode(xdr, entry->len);
7415 if (unlikely(!p))
7416 return -EAGAIN;
7417 entry->name = (const char *) p;
7418
7419 /*
7420 * In case the server doesn't return an inode number,
7421 * we fake one here. (We don't use inode number 0,
7422 * since glibc seems to choke on it...)
7423 */
7424 entry->ino = 1;
7425 entry->fattr->valid = 0;
7426
7427 if (decode_attr_bitmap(xdr, bitmap) < 0)
7428 return -EAGAIN;
7429
7430 if (decode_attr_length(xdr, &len, &savep) < 0)
7431 return -EAGAIN;
7432
7433 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7434 NULL, entry->label, entry->server) < 0)
7435 return -EAGAIN;
7436 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7437 entry->ino = entry->fattr->mounted_on_fileid;
7438 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7439 entry->ino = entry->fattr->fileid;
7440
7441 entry->d_type = DT_UNKNOWN;
7442 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7443 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7444
7445 entry->prev_cookie = entry->cookie;
7446 entry->cookie = new_cookie;
7447
7448 return 0;
7449 }
7450
7451 /*
7452 * We need to translate between nfs status return values and
7453 * the local errno values which may not be the same.
7454 */
7455 static struct {
7456 int stat;
7457 int errno;
7458 } nfs_errtbl[] = {
7459 { NFS4_OK, 0 },
7460 { NFS4ERR_PERM, -EPERM },
7461 { NFS4ERR_NOENT, -ENOENT },
7462 { NFS4ERR_IO, -errno_NFSERR_IO},
7463 { NFS4ERR_NXIO, -ENXIO },
7464 { NFS4ERR_ACCESS, -EACCES },
7465 { NFS4ERR_EXIST, -EEXIST },
7466 { NFS4ERR_XDEV, -EXDEV },
7467 { NFS4ERR_NOTDIR, -ENOTDIR },
7468 { NFS4ERR_ISDIR, -EISDIR },
7469 { NFS4ERR_INVAL, -EINVAL },
7470 { NFS4ERR_FBIG, -EFBIG },
7471 { NFS4ERR_NOSPC, -ENOSPC },
7472 { NFS4ERR_ROFS, -EROFS },
7473 { NFS4ERR_MLINK, -EMLINK },
7474 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7475 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7476 { NFS4ERR_DQUOT, -EDQUOT },
7477 { NFS4ERR_STALE, -ESTALE },
7478 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7479 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7480 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7481 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7482 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7483 { NFS4ERR_BADTYPE, -EBADTYPE },
7484 { NFS4ERR_LOCKED, -EAGAIN },
7485 { NFS4ERR_SYMLINK, -ELOOP },
7486 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7487 { NFS4ERR_DEADLOCK, -EDEADLK },
7488 { NFS4ERR_NOXATTR, -ENODATA },
7489 { NFS4ERR_XATTR2BIG, -E2BIG },
7490 { -1, -EIO }
7491 };
7492
7493 /*
7494 * Convert an NFS error code to a local one.
7495 * This one is used jointly by NFSv2 and NFSv3.
7496 */
7497 static int
7498 nfs4_stat_to_errno(int stat)
7499 {
7500 int i;
7501 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7502 if (nfs_errtbl[i].stat == stat)
7503 return nfs_errtbl[i].errno;
7504 }
7505 if (stat <= 10000 || stat > 10100) {
7506 /* The server is looney tunes. */
7507 return -EREMOTEIO;
7508 }
7509 /* If we cannot translate the error, the recovery routines should
7510 * handle it.
7511 * Note: remaining NFSv4 error codes have values > 10000, so should
7512 * not conflict with native Linux error codes.
7513 */
7514 return -stat;
7515 }
7516
7517 #ifdef CONFIG_NFS_V4_2
7518 #include "nfs42xdr.c"
7519 #endif /* CONFIG_NFS_V4_2 */
7520
7521 #define PROC(proc, argtype, restype) \
7522 [NFSPROC4_CLNT_##proc] = { \
7523 .p_proc = NFSPROC4_COMPOUND, \
7524 .p_encode = nfs4_xdr_##argtype, \
7525 .p_decode = nfs4_xdr_##restype, \
7526 .p_arglen = NFS4_##argtype##_sz, \
7527 .p_replen = NFS4_##restype##_sz, \
7528 .p_statidx = NFSPROC4_CLNT_##proc, \
7529 .p_name = #proc, \
7530 }
7531
7532 #define STUB(proc) \
7533 [NFSPROC4_CLNT_##proc] = { \
7534 .p_name = #proc, \
7535 }
7536
7537 #if defined(CONFIG_NFS_V4_1)
7538 #define PROC41(proc, argtype, restype) \
7539 PROC(proc, argtype, restype)
7540 #else
7541 #define PROC41(proc, argtype, restype) \
7542 STUB(proc)
7543 #endif
7544
7545 #if defined(CONFIG_NFS_V4_2)
7546 #define PROC42(proc, argtype, restype) \
7547 PROC(proc, argtype, restype)
7548 #else
7549 #define PROC42(proc, argtype, restype) \
7550 STUB(proc)
7551 #endif
7552
7553 const struct rpc_procinfo nfs4_procedures[] = {
7554 PROC(READ, enc_read, dec_read),
7555 PROC(WRITE, enc_write, dec_write),
7556 PROC(COMMIT, enc_commit, dec_commit),
7557 PROC(OPEN, enc_open, dec_open),
7558 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7559 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7560 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7561 PROC(CLOSE, enc_close, dec_close),
7562 PROC(SETATTR, enc_setattr, dec_setattr),
7563 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7564 PROC(RENEW, enc_renew, dec_renew),
7565 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7566 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7567 PROC(LOCK, enc_lock, dec_lock),
7568 PROC(LOCKT, enc_lockt, dec_lockt),
7569 PROC(LOCKU, enc_locku, dec_locku),
7570 PROC(ACCESS, enc_access, dec_access),
7571 PROC(GETATTR, enc_getattr, dec_getattr),
7572 PROC(LOOKUP, enc_lookup, dec_lookup),
7573 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7574 PROC(REMOVE, enc_remove, dec_remove),
7575 PROC(RENAME, enc_rename, dec_rename),
7576 PROC(LINK, enc_link, dec_link),
7577 PROC(SYMLINK, enc_symlink, dec_symlink),
7578 PROC(CREATE, enc_create, dec_create),
7579 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7580 PROC(STATFS, enc_statfs, dec_statfs),
7581 PROC(READLINK, enc_readlink, dec_readlink),
7582 PROC(READDIR, enc_readdir, dec_readdir),
7583 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7584 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7585 PROC(GETACL, enc_getacl, dec_getacl),
7586 PROC(SETACL, enc_setacl, dec_setacl),
7587 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7588 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7589 PROC(SECINFO, enc_secinfo, dec_secinfo),
7590 PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present),
7591 PROC41(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7592 PROC41(CREATE_SESSION, enc_create_session, dec_create_session),
7593 PROC41(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7594 PROC41(SEQUENCE, enc_sequence, dec_sequence),
7595 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7596 PROC41(RECLAIM_COMPLETE,enc_reclaim_complete, dec_reclaim_complete),
7597 PROC41(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7598 PROC41(LAYOUTGET, enc_layoutget, dec_layoutget),
7599 PROC41(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7600 PROC41(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7601 PROC41(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7602 PROC41(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7603 PROC41(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7604 STUB(GETDEVICELIST),
7605 PROC41(BIND_CONN_TO_SESSION,
7606 enc_bind_conn_to_session, dec_bind_conn_to_session),
7607 PROC41(DESTROY_CLIENTID,enc_destroy_clientid, dec_destroy_clientid),
7608 PROC42(SEEK, enc_seek, dec_seek),
7609 PROC42(ALLOCATE, enc_allocate, dec_allocate),
7610 PROC42(DEALLOCATE, enc_deallocate, dec_deallocate),
7611 PROC42(LAYOUTSTATS, enc_layoutstats, dec_layoutstats),
7612 PROC42(CLONE, enc_clone, dec_clone),
7613 PROC42(COPY, enc_copy, dec_copy),
7614 PROC42(OFFLOAD_CANCEL, enc_offload_cancel, dec_offload_cancel),
7615 PROC42(COPY_NOTIFY, enc_copy_notify, dec_copy_notify),
7616 PROC(LOOKUPP, enc_lookupp, dec_lookupp),
7617 PROC42(LAYOUTERROR, enc_layouterror, dec_layouterror),
7618 PROC42(GETXATTR, enc_getxattr, dec_getxattr),
7619 PROC42(SETXATTR, enc_setxattr, dec_setxattr),
7620 PROC42(LISTXATTRS, enc_listxattrs, dec_listxattrs),
7621 PROC42(REMOVEXATTR, enc_removexattr, dec_removexattr),
7622 PROC42(READ_PLUS, enc_read_plus, dec_read_plus),
7623 };
7624
7625 static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7626 const struct rpc_version nfs_version4 = {
7627 .number = 4,
7628 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7629 .procs = nfs4_procedures,
7630 .counts = nfs_version4_counts,
7631 };
7632
7633 /*
7634 * Local variables:
7635 * c-basic-offset: 8
7636 * End:
7637 */
Linux with added FPC-III support