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more accurate window sizes
[cor.git] / fs / nfs / nfs4xdr.c
blobab07db0f07cde00a7763224f633c054ac26b95d1
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 timespec *t)
1063 {
1064 p = xdr_encode_hyper(p, (__s64)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 struct timespec ts;
1076 char owner_name[IDMAP_NAMESZ];
1077 char owner_group[IDMAP_NAMESZ];
1078 int owner_namelen = 0;
1079 int owner_grouplen = 0;
1080 __be32 *p;
1081 uint32_t len = 0;
1082 uint32_t bmval[3] = { 0 };
1083
1084 /*
1085 * We reserve enough space to write the entire attribute buffer at once.
1086 */
1087 if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1088 bmval[0] |= FATTR4_WORD0_SIZE;
1089 len += 8;
1090 }
1091 if (iap->ia_valid & ATTR_MODE) {
1092 if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1093 bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1094 len += 8;
1095 } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1096 bmval[1] |= FATTR4_WORD1_MODE;
1097 len += 4;
1098 }
1099 }
1100 if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1101 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1102 if (owner_namelen < 0) {
1103 dprintk("nfs: couldn't resolve uid %d to string\n",
1104 from_kuid(&init_user_ns, iap->ia_uid));
1105 /* XXX */
1106 strcpy(owner_name, "nobody");
1107 owner_namelen = sizeof("nobody") - 1;
1108 /* goto out; */
1109 }
1110 bmval[1] |= FATTR4_WORD1_OWNER;
1111 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1112 }
1113 if ((iap->ia_valid & ATTR_GID) &&
1114 (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1115 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1116 if (owner_grouplen < 0) {
1117 dprintk("nfs: couldn't resolve gid %d to string\n",
1118 from_kgid(&init_user_ns, iap->ia_gid));
1119 strcpy(owner_group, "nobody");
1120 owner_grouplen = sizeof("nobody") - 1;
1121 /* goto out; */
1122 }
1123 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1124 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1125 }
1126 if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1127 if (iap->ia_valid & ATTR_ATIME_SET) {
1128 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1129 len += 4 + (nfstime4_maxsz << 2);
1130 } else if (iap->ia_valid & ATTR_ATIME) {
1131 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1132 len += 4;
1133 }
1134 }
1135 if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1136 if (iap->ia_valid & ATTR_MTIME_SET) {
1137 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1138 len += 4 + (nfstime4_maxsz << 2);
1139 } else if (iap->ia_valid & ATTR_MTIME) {
1140 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1141 len += 4;
1142 }
1143 }
1144
1145 if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1146 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1147 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1148 }
1149
1150 xdr_encode_bitmap4(xdr, bmval, ARRAY_SIZE(bmval));
1151 xdr_stream_encode_opaque_inline(xdr, (void **)&p, len);
1152
1153 if (bmval[0] & FATTR4_WORD0_SIZE)
1154 p = xdr_encode_hyper(p, iap->ia_size);
1155 if (bmval[1] & FATTR4_WORD1_MODE)
1156 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1157 if (bmval[1] & FATTR4_WORD1_OWNER)
1158 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1159 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1160 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1161 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1162 if (iap->ia_valid & ATTR_ATIME_SET) {
1163 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1164 ts = timespec64_to_timespec(iap->ia_atime);
1165 p = xdr_encode_nfstime4(p, &ts);
1166 } else
1167 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1168 }
1169 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1170 if (iap->ia_valid & ATTR_MTIME_SET) {
1171 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1172 ts = timespec64_to_timespec(iap->ia_mtime);
1173 p = xdr_encode_nfstime4(p, &ts);
1174 } else
1175 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1176 }
1177 if (label && (bmval[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1178 *p++ = cpu_to_be32(label->lfs);
1179 *p++ = cpu_to_be32(label->pi);
1180 *p++ = cpu_to_be32(label->len);
1181 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1182 }
1183 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1184 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1185 *p++ = cpu_to_be32(*umask);
1186 }
1187
1188 /* out: */
1189 }
1190
1191 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1192 {
1193 encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1194 encode_uint32(xdr, access);
1195 }
1196
1197 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1198 {
1199 encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1200 encode_nfs4_seqid(xdr, arg->seqid);
1201 encode_nfs4_stateid(xdr, &arg->stateid);
1202 }
1203
1204 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1205 {
1206 __be32 *p;
1207
1208 encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1209 p = reserve_space(xdr, 12);
1210 p = xdr_encode_hyper(p, args->offset);
1211 *p = cpu_to_be32(args->count);
1212 }
1213
1214 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1215 {
1216 __be32 *p;
1217
1218 encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1219 encode_uint32(xdr, create->ftype);
1220
1221 switch (create->ftype) {
1222 case NF4LNK:
1223 p = reserve_space(xdr, 4);
1224 *p = cpu_to_be32(create->u.symlink.len);
1225 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1226 create->u.symlink.len);
1227 xdr->buf->flags |= XDRBUF_WRITE;
1228 break;
1229
1230 case NF4BLK: case NF4CHR:
1231 p = reserve_space(xdr, 8);
1232 *p++ = cpu_to_be32(create->u.device.specdata1);
1233 *p = cpu_to_be32(create->u.device.specdata2);
1234 break;
1235
1236 default:
1237 break;
1238 }
1239
1240 encode_string(xdr, create->name->len, create->name->name);
1241 encode_attrs(xdr, create->attrs, create->label, &create->umask,
1242 create->server, create->server->attr_bitmask);
1243 }
1244
1245 static void encode_getattr(struct xdr_stream *xdr,
1246 const __u32 *bitmap, const __u32 *mask, size_t len,
1247 struct compound_hdr *hdr)
1248 {
1249 __u32 masked_bitmap[nfs4_fattr_bitmap_maxsz];
1250
1251 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1252 if (mask) {
1253 if (WARN_ON_ONCE(len > ARRAY_SIZE(masked_bitmap)))
1254 len = ARRAY_SIZE(masked_bitmap);
1255 len = mask_bitmap4(bitmap, mask, masked_bitmap, len);
1256 bitmap = masked_bitmap;
1257 }
1258 xdr_encode_bitmap4(xdr, bitmap, len);
1259 }
1260
1261 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1262 {
1263 encode_getattr(xdr, nfs4_fattr_bitmap, bitmask,
1264 ARRAY_SIZE(nfs4_fattr_bitmap), hdr);
1265 }
1266
1267 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1268 const u32 *open_bitmap,
1269 struct compound_hdr *hdr)
1270 {
1271 encode_getattr(xdr, open_bitmap, bitmask, 3, hdr);
1272 }
1273
1274 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1275 {
1276 encode_getattr(xdr, nfs4_fsinfo_bitmap, bitmask,
1277 ARRAY_SIZE(nfs4_fsinfo_bitmap), hdr);
1278 }
1279
1280 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1281 {
1282 encode_getattr(xdr, nfs4_fs_locations_bitmap, bitmask,
1283 ARRAY_SIZE(nfs4_fs_locations_bitmap), hdr);
1284 }
1285
1286 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1287 {
1288 encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1289 }
1290
1291 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1292 {
1293 encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1294 encode_string(xdr, name->len, name->name);
1295 }
1296
1297 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1298 {
1299 if (fl->fl_type == F_RDLCK)
1300 return block ? NFS4_READW_LT : NFS4_READ_LT;
1301 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1302 }
1303
1304 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1305 {
1306 if (fl->fl_end == OFFSET_MAX)
1307 return ~(uint64_t)0;
1308 return fl->fl_end - fl->fl_start + 1;
1309 }
1310
1311 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1312 {
1313 __be32 *p;
1314
1315 p = reserve_space(xdr, 32);
1316 p = xdr_encode_hyper(p, lowner->clientid);
1317 *p++ = cpu_to_be32(20);
1318 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1319 *p++ = cpu_to_be32(lowner->s_dev);
1320 xdr_encode_hyper(p, lowner->id);
1321 }
1322
1323 /*
1324 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1325 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1326 */
1327 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1328 {
1329 __be32 *p;
1330
1331 encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1332 p = reserve_space(xdr, 28);
1333 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1334 *p++ = cpu_to_be32(args->reclaim);
1335 p = xdr_encode_hyper(p, args->fl->fl_start);
1336 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1337 *p = cpu_to_be32(args->new_lock_owner);
1338 if (args->new_lock_owner){
1339 encode_nfs4_seqid(xdr, args->open_seqid);
1340 encode_nfs4_stateid(xdr, &args->open_stateid);
1341 encode_nfs4_seqid(xdr, args->lock_seqid);
1342 encode_lockowner(xdr, &args->lock_owner);
1343 }
1344 else {
1345 encode_nfs4_stateid(xdr, &args->lock_stateid);
1346 encode_nfs4_seqid(xdr, args->lock_seqid);
1347 }
1348 }
1349
1350 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1351 {
1352 __be32 *p;
1353
1354 encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1355 p = reserve_space(xdr, 20);
1356 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1357 p = xdr_encode_hyper(p, args->fl->fl_start);
1358 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1359 encode_lockowner(xdr, &args->lock_owner);
1360 }
1361
1362 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1363 {
1364 __be32 *p;
1365
1366 encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1367 encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1368 encode_nfs4_seqid(xdr, args->seqid);
1369 encode_nfs4_stateid(xdr, &args->stateid);
1370 p = reserve_space(xdr, 16);
1371 p = xdr_encode_hyper(p, args->fl->fl_start);
1372 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1373 }
1374
1375 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1376 {
1377 encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1378 encode_lockowner(xdr, lowner);
1379 }
1380
1381 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1382 {
1383 encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1384 encode_string(xdr, name->len, name->name);
1385 }
1386
1387 static void encode_lookupp(struct xdr_stream *xdr, struct compound_hdr *hdr)
1388 {
1389 encode_op_hdr(xdr, OP_LOOKUPP, decode_lookupp_maxsz, hdr);
1390 }
1391
1392 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1393 {
1394 __be32 *p;
1395
1396 p = reserve_space(xdr, 8);
1397 *p++ = cpu_to_be32(share_access);
1398 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1399 }
1400
1401 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1402 {
1403 __be32 *p;
1404 /*
1405 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1406 * owner 4 = 32
1407 */
1408 encode_nfs4_seqid(xdr, arg->seqid);
1409 encode_share_access(xdr, arg->share_access);
1410 p = reserve_space(xdr, 36);
1411 p = xdr_encode_hyper(p, arg->clientid);
1412 *p++ = cpu_to_be32(24);
1413 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1414 *p++ = cpu_to_be32(arg->server->s_dev);
1415 *p++ = cpu_to_be32(arg->id.uniquifier);
1416 xdr_encode_hyper(p, arg->id.create_time);
1417 }
1418
1419 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1420 {
1421 __be32 *p;
1422
1423 p = reserve_space(xdr, 4);
1424 switch(arg->createmode) {
1425 case NFS4_CREATE_UNCHECKED:
1426 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1427 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1428 arg->server, arg->server->attr_bitmask);
1429 break;
1430 case NFS4_CREATE_GUARDED:
1431 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1432 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1433 arg->server, arg->server->attr_bitmask);
1434 break;
1435 case NFS4_CREATE_EXCLUSIVE:
1436 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1437 encode_nfs4_verifier(xdr, &arg->u.verifier);
1438 break;
1439 case NFS4_CREATE_EXCLUSIVE4_1:
1440 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1441 encode_nfs4_verifier(xdr, &arg->u.verifier);
1442 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1443 arg->server, arg->server->exclcreat_bitmask);
1444 }
1445 }
1446
1447 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1448 {
1449 __be32 *p;
1450
1451 p = reserve_space(xdr, 4);
1452 switch (arg->open_flags & O_CREAT) {
1453 case 0:
1454 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1455 break;
1456 default:
1457 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1458 encode_createmode(xdr, arg);
1459 }
1460 }
1461
1462 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1463 {
1464 __be32 *p;
1465
1466 p = reserve_space(xdr, 4);
1467 switch (delegation_type) {
1468 case 0:
1469 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1470 break;
1471 case FMODE_READ:
1472 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1473 break;
1474 case FMODE_WRITE|FMODE_READ:
1475 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1476 break;
1477 default:
1478 BUG();
1479 }
1480 }
1481
1482 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1483 {
1484 __be32 *p;
1485
1486 p = reserve_space(xdr, 4);
1487 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1488 encode_string(xdr, name->len, name->name);
1489 }
1490
1491 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1492 {
1493 __be32 *p;
1494
1495 p = reserve_space(xdr, 4);
1496 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1497 encode_delegation_type(xdr, type);
1498 }
1499
1500 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1501 {
1502 __be32 *p;
1503
1504 p = reserve_space(xdr, 4);
1505 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1506 encode_nfs4_stateid(xdr, stateid);
1507 encode_string(xdr, name->len, name->name);
1508 }
1509
1510 static inline void encode_claim_fh(struct xdr_stream *xdr)
1511 {
1512 __be32 *p;
1513
1514 p = reserve_space(xdr, 4);
1515 *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1516 }
1517
1518 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1519 {
1520 __be32 *p;
1521
1522 p = reserve_space(xdr, 4);
1523 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1524 encode_nfs4_stateid(xdr, stateid);
1525 }
1526
1527 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1528 {
1529 encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1530 encode_openhdr(xdr, arg);
1531 encode_opentype(xdr, arg);
1532 switch (arg->claim) {
1533 case NFS4_OPEN_CLAIM_NULL:
1534 encode_claim_null(xdr, arg->name);
1535 break;
1536 case NFS4_OPEN_CLAIM_PREVIOUS:
1537 encode_claim_previous(xdr, arg->u.delegation_type);
1538 break;
1539 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1540 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1541 break;
1542 case NFS4_OPEN_CLAIM_FH:
1543 encode_claim_fh(xdr);
1544 break;
1545 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1546 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1547 break;
1548 default:
1549 BUG();
1550 }
1551 }
1552
1553 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1554 {
1555 encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1556 encode_nfs4_stateid(xdr, arg->stateid);
1557 encode_nfs4_seqid(xdr, arg->seqid);
1558 }
1559
1560 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1561 {
1562 encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1563 encode_nfs4_stateid(xdr, &arg->stateid);
1564 encode_nfs4_seqid(xdr, arg->seqid);
1565 encode_share_access(xdr, arg->share_access);
1566 }
1567
1568 static void
1569 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1570 {
1571 encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1572 encode_string(xdr, fh->size, fh->data);
1573 }
1574
1575 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1576 {
1577 encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1578 }
1579
1580 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1581 struct compound_hdr *hdr)
1582 {
1583 __be32 *p;
1584
1585 encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1586 encode_nfs4_stateid(xdr, &args->stateid);
1587
1588 p = reserve_space(xdr, 12);
1589 p = xdr_encode_hyper(p, args->offset);
1590 *p = cpu_to_be32(args->count);
1591 }
1592
1593 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1594 {
1595 uint32_t attrs[3] = {
1596 FATTR4_WORD0_RDATTR_ERROR,
1597 FATTR4_WORD1_MOUNTED_ON_FILEID,
1598 };
1599 uint32_t dircount = readdir->count >> 1;
1600 __be32 *p, verf[2];
1601 uint32_t attrlen = 0;
1602 unsigned int i;
1603
1604 if (readdir->plus) {
1605 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1606 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1607 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1608 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1609 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1610 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1611 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1612 dircount >>= 1;
1613 }
1614 /* Use mounted_on_fileid only if the server supports it */
1615 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1616 attrs[0] |= FATTR4_WORD0_FILEID;
1617 for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1618 attrs[i] &= readdir->bitmask[i];
1619 if (attrs[i] != 0)
1620 attrlen = i+1;
1621 }
1622
1623 encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1624 encode_uint64(xdr, readdir->cookie);
1625 encode_nfs4_verifier(xdr, &readdir->verifier);
1626 p = reserve_space(xdr, 12 + (attrlen << 2));
1627 *p++ = cpu_to_be32(dircount);
1628 *p++ = cpu_to_be32(readdir->count);
1629 *p++ = cpu_to_be32(attrlen);
1630 for (i = 0; i < attrlen; i++)
1631 *p++ = cpu_to_be32(attrs[i]);
1632 memcpy(verf, readdir->verifier.data, sizeof(verf));
1633
1634 dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1635 __func__,
1636 (unsigned long long)readdir->cookie,
1637 verf[0], verf[1],
1638 attrs[0] & readdir->bitmask[0],
1639 attrs[1] & readdir->bitmask[1],
1640 attrs[2] & readdir->bitmask[2]);
1641 }
1642
1643 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1644 {
1645 encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1646 }
1647
1648 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1649 {
1650 encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1651 encode_string(xdr, name->len, name->name);
1652 }
1653
1654 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1655 {
1656 encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1657 encode_string(xdr, oldname->len, oldname->name);
1658 encode_string(xdr, newname->len, newname->name);
1659 }
1660
1661 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1662 struct compound_hdr *hdr)
1663 {
1664 encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1665 encode_uint64(xdr, clid);
1666 }
1667
1668 static void
1669 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1670 {
1671 encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1672 }
1673
1674 static void
1675 encode_setacl(struct xdr_stream *xdr, const struct nfs_setaclargs *arg,
1676 struct compound_hdr *hdr)
1677 {
1678 __be32 *p;
1679
1680 encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1681 encode_nfs4_stateid(xdr, &zero_stateid);
1682 p = reserve_space(xdr, 2*4);
1683 *p++ = cpu_to_be32(1);
1684 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1685 p = reserve_space(xdr, 4);
1686 *p = cpu_to_be32(arg->acl_len);
1687 xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1688 }
1689
1690 static void
1691 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1692 {
1693 encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1694 }
1695
1696 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1697 {
1698 encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1699 encode_nfs4_stateid(xdr, &arg->stateid);
1700 encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1701 server->attr_bitmask);
1702 }
1703
1704 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1705 {
1706 __be32 *p;
1707
1708 encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1709 encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1710
1711 encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1712 setclientid->sc_clnt->cl_owner_id);
1713 p = reserve_space(xdr, 4);
1714 *p = cpu_to_be32(setclientid->sc_prog);
1715 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1716 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1717 p = reserve_space(xdr, 4);
1718 *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1719 }
1720
1721 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1722 {
1723 encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1724 decode_setclientid_confirm_maxsz, hdr);
1725 encode_uint64(xdr, arg->clientid);
1726 encode_nfs4_verifier(xdr, &arg->confirm);
1727 }
1728
1729 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1730 struct compound_hdr *hdr)
1731 {
1732 __be32 *p;
1733
1734 encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1735 encode_nfs4_stateid(xdr, &args->stateid);
1736
1737 p = reserve_space(xdr, 16);
1738 p = xdr_encode_hyper(p, args->offset);
1739 *p++ = cpu_to_be32(args->stable);
1740 *p = cpu_to_be32(args->count);
1741
1742 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1743 }
1744
1745 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1746 {
1747 encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1748 encode_nfs4_stateid(xdr, stateid);
1749 }
1750
1751 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1752 {
1753 encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1754 encode_string(xdr, name->len, name->name);
1755 }
1756
1757 #if defined(CONFIG_NFS_V4_1)
1758 /* NFSv4.1 operations */
1759 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1760 const struct nfs41_bind_conn_to_session_args *args,
1761 struct compound_hdr *hdr)
1762 {
1763 __be32 *p;
1764
1765 encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1766 decode_bind_conn_to_session_maxsz, hdr);
1767 encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1768 p = xdr_reserve_space(xdr, 8);
1769 *p++ = cpu_to_be32(args->dir);
1770 *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1771 }
1772
1773 static void encode_op_map(struct xdr_stream *xdr, const struct nfs4_op_map *op_map)
1774 {
1775 unsigned int i;
1776 encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1777 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1778 encode_uint32(xdr, op_map->u.words[i]);
1779 }
1780
1781 static void encode_exchange_id(struct xdr_stream *xdr,
1782 const struct nfs41_exchange_id_args *args,
1783 struct compound_hdr *hdr)
1784 {
1785 __be32 *p;
1786 char impl_name[IMPL_NAME_LIMIT];
1787 int len = 0;
1788
1789 encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1790 encode_nfs4_verifier(xdr, &args->verifier);
1791
1792 encode_string(xdr, strlen(args->client->cl_owner_id),
1793 args->client->cl_owner_id);
1794
1795 encode_uint32(xdr, args->flags);
1796 encode_uint32(xdr, args->state_protect.how);
1797
1798 switch (args->state_protect.how) {
1799 case SP4_NONE:
1800 break;
1801 case SP4_MACH_CRED:
1802 encode_op_map(xdr, &args->state_protect.enforce);
1803 encode_op_map(xdr, &args->state_protect.allow);
1804 break;
1805 default:
1806 WARN_ON_ONCE(1);
1807 break;
1808 }
1809
1810 if (send_implementation_id &&
1811 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1812 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1813 <= sizeof(impl_name) + 1)
1814 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1815 utsname()->sysname, utsname()->release,
1816 utsname()->version, utsname()->machine);
1817
1818 if (len > 0) {
1819 encode_uint32(xdr, 1); /* implementation id array length=1 */
1820
1821 encode_string(xdr,
1822 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1823 CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1824 encode_string(xdr, len, impl_name);
1825 /* just send zeros for nii_date - the date is in nii_name */
1826 p = reserve_space(xdr, 12);
1827 p = xdr_encode_hyper(p, 0);
1828 *p = cpu_to_be32(0);
1829 } else
1830 encode_uint32(xdr, 0); /* implementation id array length=0 */
1831 }
1832
1833 static void encode_create_session(struct xdr_stream *xdr,
1834 const struct nfs41_create_session_args *args,
1835 struct compound_hdr *hdr)
1836 {
1837 __be32 *p;
1838 struct nfs_client *clp = args->client;
1839 struct rpc_clnt *clnt = clp->cl_rpcclient;
1840 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1841 u32 max_resp_sz_cached;
1842
1843 /*
1844 * Assumes OPEN is the biggest non-idempotent compound.
1845 * 2 is the verifier.
1846 */
1847 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE + 2)
1848 * XDR_UNIT + RPC_MAX_AUTH_SIZE;
1849
1850 encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1851 p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1852 p = xdr_encode_hyper(p, args->clientid);
1853 *p++ = cpu_to_be32(args->seqid); /*Sequence id */
1854 *p++ = cpu_to_be32(args->flags); /*flags */
1855
1856 /* Fore Channel */
1857 *p++ = cpu_to_be32(0); /* header padding size */
1858 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1859 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1860 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1861 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1862 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1863 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1864
1865 /* Back Channel */
1866 *p++ = cpu_to_be32(0); /* header padding size */
1867 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1868 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1869 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1870 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1871 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1872 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1873
1874 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1875 *p++ = cpu_to_be32(1);
1876 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1877
1878 /* authsys_parms rfc1831 */
1879 *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1880 p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1881 *p++ = cpu_to_be32(0); /* UID */
1882 *p++ = cpu_to_be32(0); /* GID */
1883 *p = cpu_to_be32(0); /* No more gids */
1884 }
1885
1886 static void encode_destroy_session(struct xdr_stream *xdr,
1887 const struct nfs4_session *session,
1888 struct compound_hdr *hdr)
1889 {
1890 encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1891 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1892 }
1893
1894 static void encode_destroy_clientid(struct xdr_stream *xdr,
1895 uint64_t clientid,
1896 struct compound_hdr *hdr)
1897 {
1898 encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1899 encode_uint64(xdr, clientid);
1900 }
1901
1902 static void encode_reclaim_complete(struct xdr_stream *xdr,
1903 const struct nfs41_reclaim_complete_args *args,
1904 struct compound_hdr *hdr)
1905 {
1906 encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1907 encode_uint32(xdr, args->one_fs);
1908 }
1909 #endif /* CONFIG_NFS_V4_1 */
1910
1911 static void encode_sequence(struct xdr_stream *xdr,
1912 const struct nfs4_sequence_args *args,
1913 struct compound_hdr *hdr)
1914 {
1915 #if defined(CONFIG_NFS_V4_1)
1916 struct nfs4_session *session;
1917 struct nfs4_slot_table *tp;
1918 struct nfs4_slot *slot = args->sa_slot;
1919 __be32 *p;
1920
1921 tp = slot->table;
1922 session = tp->session;
1923 if (!session)
1924 return;
1925
1926 encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1927
1928 /*
1929 * Sessionid + seqid + slotid + max slotid + cache_this
1930 */
1931 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1932 "max_slotid=%d cache_this=%d\n",
1933 __func__,
1934 ((u32 *)session->sess_id.data)[0],
1935 ((u32 *)session->sess_id.data)[1],
1936 ((u32 *)session->sess_id.data)[2],
1937 ((u32 *)session->sess_id.data)[3],
1938 slot->seq_nr, slot->slot_nr,
1939 tp->highest_used_slotid, args->sa_cache_this);
1940 p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1941 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1942 *p++ = cpu_to_be32(slot->seq_nr);
1943 *p++ = cpu_to_be32(slot->slot_nr);
1944 *p++ = cpu_to_be32(tp->highest_used_slotid);
1945 *p = cpu_to_be32(args->sa_cache_this);
1946 #endif /* CONFIG_NFS_V4_1 */
1947 }
1948
1949 #ifdef CONFIG_NFS_V4_1
1950 static void
1951 encode_getdeviceinfo(struct xdr_stream *xdr,
1952 const struct nfs4_getdeviceinfo_args *args,
1953 struct compound_hdr *hdr)
1954 {
1955 __be32 *p;
1956
1957 encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1958 p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1959 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1960 NFS4_DEVICEID4_SIZE);
1961 *p++ = cpu_to_be32(args->pdev->layout_type);
1962 *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */
1963
1964 p = reserve_space(xdr, 4 + 4);
1965 *p++ = cpu_to_be32(1); /* bitmap length */
1966 *p++ = cpu_to_be32(args->notify_types);
1967 }
1968
1969 static void
1970 encode_layoutget(struct xdr_stream *xdr,
1971 const struct nfs4_layoutget_args *args,
1972 struct compound_hdr *hdr)
1973 {
1974 __be32 *p;
1975
1976 encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1977 p = reserve_space(xdr, 36);
1978 *p++ = cpu_to_be32(0); /* Signal layout available */
1979 *p++ = cpu_to_be32(args->type);
1980 *p++ = cpu_to_be32(args->range.iomode);
1981 p = xdr_encode_hyper(p, args->range.offset);
1982 p = xdr_encode_hyper(p, args->range.length);
1983 p = xdr_encode_hyper(p, args->minlength);
1984 encode_nfs4_stateid(xdr, &args->stateid);
1985 encode_uint32(xdr, args->maxcount);
1986
1987 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1988 __func__,
1989 args->type,
1990 args->range.iomode,
1991 (unsigned long)args->range.offset,
1992 (unsigned long)args->range.length,
1993 args->maxcount);
1994 }
1995
1996 static int
1997 encode_layoutcommit(struct xdr_stream *xdr,
1998 struct inode *inode,
1999 const struct nfs4_layoutcommit_args *args,
2000 struct compound_hdr *hdr)
2001 {
2002 __be32 *p;
2003
2004 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
2005 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
2006
2007 encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2008 p = reserve_space(xdr, 20);
2009 /* Only whole file layouts */
2010 p = xdr_encode_hyper(p, 0); /* offset */
2011 p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
2012 *p = cpu_to_be32(0); /* reclaim */
2013 encode_nfs4_stateid(xdr, &args->stateid);
2014 if (args->lastbytewritten != U64_MAX) {
2015 p = reserve_space(xdr, 20);
2016 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2017 p = xdr_encode_hyper(p, args->lastbytewritten);
2018 } else {
2019 p = reserve_space(xdr, 12);
2020 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2021 }
2022 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2023 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2024
2025 encode_uint32(xdr, args->layoutupdate_len);
2026 if (args->layoutupdate_pages)
2027 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2028 args->layoutupdate_len);
2029
2030 return 0;
2031 }
2032
2033 static void
2034 encode_layoutreturn(struct xdr_stream *xdr,
2035 const struct nfs4_layoutreturn_args *args,
2036 struct compound_hdr *hdr)
2037 {
2038 __be32 *p;
2039
2040 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2041 p = reserve_space(xdr, 16);
2042 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
2043 *p++ = cpu_to_be32(args->layout_type);
2044 *p++ = cpu_to_be32(args->range.iomode);
2045 *p = cpu_to_be32(RETURN_FILE);
2046 p = reserve_space(xdr, 16);
2047 p = xdr_encode_hyper(p, args->range.offset);
2048 p = xdr_encode_hyper(p, args->range.length);
2049 spin_lock(&args->inode->i_lock);
2050 encode_nfs4_stateid(xdr, &args->stateid);
2051 spin_unlock(&args->inode->i_lock);
2052 if (args->ld_private->ops && args->ld_private->ops->encode)
2053 args->ld_private->ops->encode(xdr, args, args->ld_private);
2054 else
2055 encode_uint32(xdr, 0);
2056 }
2057
2058 static int
2059 encode_secinfo_no_name(struct xdr_stream *xdr,
2060 const struct nfs41_secinfo_no_name_args *args,
2061 struct compound_hdr *hdr)
2062 {
2063 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2064 encode_uint32(xdr, args->style);
2065 return 0;
2066 }
2067
2068 static void encode_test_stateid(struct xdr_stream *xdr,
2069 const struct nfs41_test_stateid_args *args,
2070 struct compound_hdr *hdr)
2071 {
2072 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2073 encode_uint32(xdr, 1);
2074 encode_nfs4_stateid(xdr, args->stateid);
2075 }
2076
2077 static void encode_free_stateid(struct xdr_stream *xdr,
2078 const struct nfs41_free_stateid_args *args,
2079 struct compound_hdr *hdr)
2080 {
2081 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2082 encode_nfs4_stateid(xdr, &args->stateid);
2083 }
2084 #else
2085 static inline void
2086 encode_layoutreturn(struct xdr_stream *xdr,
2087 const struct nfs4_layoutreturn_args *args,
2088 struct compound_hdr *hdr)
2089 {
2090 }
2091
2092 static void
2093 encode_layoutget(struct xdr_stream *xdr,
2094 const struct nfs4_layoutget_args *args,
2095 struct compound_hdr *hdr)
2096 {
2097 }
2098 #endif /* CONFIG_NFS_V4_1 */
2099
2100 /*
2101 * END OF "GENERIC" ENCODE ROUTINES.
2102 */
2103
2104 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2105 {
2106 #if defined(CONFIG_NFS_V4_1)
2107 struct nfs4_session *session = args->sa_slot->table->session;
2108 if (session)
2109 return session->clp->cl_mvops->minor_version;
2110 #endif /* CONFIG_NFS_V4_1 */
2111 return 0;
2112 }
2113
2114 /*
2115 * Encode an ACCESS request
2116 */
2117 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2118 const void *data)
2119 {
2120 const struct nfs4_accessargs *args = data;
2121 struct compound_hdr hdr = {
2122 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2123 };
2124
2125 encode_compound_hdr(xdr, req, &hdr);
2126 encode_sequence(xdr, &args->seq_args, &hdr);
2127 encode_putfh(xdr, args->fh, &hdr);
2128 encode_access(xdr, args->access, &hdr);
2129 if (args->bitmask)
2130 encode_getfattr(xdr, args->bitmask, &hdr);
2131 encode_nops(&hdr);
2132 }
2133
2134 /*
2135 * Encode LOOKUP request
2136 */
2137 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2138 const void *data)
2139 {
2140 const struct nfs4_lookup_arg *args = data;
2141 struct compound_hdr hdr = {
2142 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2143 };
2144
2145 encode_compound_hdr(xdr, req, &hdr);
2146 encode_sequence(xdr, &args->seq_args, &hdr);
2147 encode_putfh(xdr, args->dir_fh, &hdr);
2148 encode_lookup(xdr, args->name, &hdr);
2149 encode_getfh(xdr, &hdr);
2150 encode_getfattr(xdr, args->bitmask, &hdr);
2151 encode_nops(&hdr);
2152 }
2153
2154 /*
2155 * Encode LOOKUPP request
2156 */
2157 static void nfs4_xdr_enc_lookupp(struct rpc_rqst *req, struct xdr_stream *xdr,
2158 const void *data)
2159 {
2160 const struct nfs4_lookupp_arg *args = data;
2161 struct compound_hdr hdr = {
2162 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2163 };
2164
2165 encode_compound_hdr(xdr, req, &hdr);
2166 encode_sequence(xdr, &args->seq_args, &hdr);
2167 encode_putfh(xdr, args->fh, &hdr);
2168 encode_lookupp(xdr, &hdr);
2169 encode_getfh(xdr, &hdr);
2170 encode_getfattr(xdr, args->bitmask, &hdr);
2171 encode_nops(&hdr);
2172 }
2173
2174 /*
2175 * Encode LOOKUP_ROOT request
2176 */
2177 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2178 struct xdr_stream *xdr,
2179 const void *data)
2180 {
2181 const struct nfs4_lookup_root_arg *args = data;
2182 struct compound_hdr hdr = {
2183 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2184 };
2185
2186 encode_compound_hdr(xdr, req, &hdr);
2187 encode_sequence(xdr, &args->seq_args, &hdr);
2188 encode_putrootfh(xdr, &hdr);
2189 encode_getfh(xdr, &hdr);
2190 encode_getfattr(xdr, args->bitmask, &hdr);
2191 encode_nops(&hdr);
2192 }
2193
2194 /*
2195 * Encode REMOVE request
2196 */
2197 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2198 const void *data)
2199 {
2200 const struct nfs_removeargs *args = data;
2201 struct compound_hdr hdr = {
2202 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2203 };
2204
2205 encode_compound_hdr(xdr, req, &hdr);
2206 encode_sequence(xdr, &args->seq_args, &hdr);
2207 encode_putfh(xdr, args->fh, &hdr);
2208 encode_remove(xdr, &args->name, &hdr);
2209 encode_nops(&hdr);
2210 }
2211
2212 /*
2213 * Encode RENAME request
2214 */
2215 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2216 const void *data)
2217 {
2218 const struct nfs_renameargs *args = data;
2219 struct compound_hdr hdr = {
2220 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2221 };
2222
2223 encode_compound_hdr(xdr, req, &hdr);
2224 encode_sequence(xdr, &args->seq_args, &hdr);
2225 encode_putfh(xdr, args->old_dir, &hdr);
2226 encode_savefh(xdr, &hdr);
2227 encode_putfh(xdr, args->new_dir, &hdr);
2228 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2229 encode_nops(&hdr);
2230 }
2231
2232 /*
2233 * Encode LINK request
2234 */
2235 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2236 const void *data)
2237 {
2238 const struct nfs4_link_arg *args = data;
2239 struct compound_hdr hdr = {
2240 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2241 };
2242
2243 encode_compound_hdr(xdr, req, &hdr);
2244 encode_sequence(xdr, &args->seq_args, &hdr);
2245 encode_putfh(xdr, args->fh, &hdr);
2246 encode_savefh(xdr, &hdr);
2247 encode_putfh(xdr, args->dir_fh, &hdr);
2248 encode_link(xdr, args->name, &hdr);
2249 encode_restorefh(xdr, &hdr);
2250 encode_getfattr(xdr, args->bitmask, &hdr);
2251 encode_nops(&hdr);
2252 }
2253
2254 /*
2255 * Encode CREATE request
2256 */
2257 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2258 const void *data)
2259 {
2260 const struct nfs4_create_arg *args = data;
2261 struct compound_hdr hdr = {
2262 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2263 };
2264
2265 encode_compound_hdr(xdr, req, &hdr);
2266 encode_sequence(xdr, &args->seq_args, &hdr);
2267 encode_putfh(xdr, args->dir_fh, &hdr);
2268 encode_create(xdr, args, &hdr);
2269 encode_getfh(xdr, &hdr);
2270 encode_getfattr(xdr, args->bitmask, &hdr);
2271 encode_nops(&hdr);
2272 }
2273
2274 /*
2275 * Encode SYMLINK request
2276 */
2277 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2278 const void *data)
2279 {
2280 const struct nfs4_create_arg *args = data;
2281
2282 nfs4_xdr_enc_create(req, xdr, args);
2283 }
2284
2285 /*
2286 * Encode GETATTR request
2287 */
2288 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2289 const void *data)
2290 {
2291 const struct nfs4_getattr_arg *args = data;
2292 struct compound_hdr hdr = {
2293 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2294 };
2295
2296 encode_compound_hdr(xdr, req, &hdr);
2297 encode_sequence(xdr, &args->seq_args, &hdr);
2298 encode_putfh(xdr, args->fh, &hdr);
2299 encode_getfattr(xdr, args->bitmask, &hdr);
2300 encode_nops(&hdr);
2301 }
2302
2303 /*
2304 * Encode a CLOSE request
2305 */
2306 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2307 const void *data)
2308 {
2309 const struct nfs_closeargs *args = data;
2310 struct compound_hdr hdr = {
2311 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2312 };
2313
2314 encode_compound_hdr(xdr, req, &hdr);
2315 encode_sequence(xdr, &args->seq_args, &hdr);
2316 encode_putfh(xdr, args->fh, &hdr);
2317 if (args->lr_args)
2318 encode_layoutreturn(xdr, args->lr_args, &hdr);
2319 if (args->bitmask != NULL)
2320 encode_getfattr(xdr, args->bitmask, &hdr);
2321 encode_close(xdr, args, &hdr);
2322 encode_nops(&hdr);
2323 }
2324
2325 /*
2326 * Encode an OPEN request
2327 */
2328 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2329 const void *data)
2330 {
2331 const struct nfs_openargs *args = data;
2332 struct compound_hdr hdr = {
2333 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2334 };
2335
2336 encode_compound_hdr(xdr, req, &hdr);
2337 encode_sequence(xdr, &args->seq_args, &hdr);
2338 encode_putfh(xdr, args->fh, &hdr);
2339 encode_open(xdr, args, &hdr);
2340 encode_getfh(xdr, &hdr);
2341 if (args->access)
2342 encode_access(xdr, args->access, &hdr);
2343 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2344 if (args->lg_args) {
2345 encode_layoutget(xdr, args->lg_args, &hdr);
2346 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2347 args->lg_args->layout.pglen,
2348 hdr.replen);
2349 }
2350 encode_nops(&hdr);
2351 }
2352
2353 /*
2354 * Encode an OPEN_CONFIRM request
2355 */
2356 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2357 struct xdr_stream *xdr,
2358 const void *data)
2359 {
2360 const struct nfs_open_confirmargs *args = data;
2361 struct compound_hdr hdr = {
2362 .nops = 0,
2363 };
2364
2365 encode_compound_hdr(xdr, req, &hdr);
2366 encode_putfh(xdr, args->fh, &hdr);
2367 encode_open_confirm(xdr, args, &hdr);
2368 encode_nops(&hdr);
2369 }
2370
2371 /*
2372 * Encode an OPEN request with no attributes.
2373 */
2374 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2375 struct xdr_stream *xdr,
2376 const void *data)
2377 {
2378 const struct nfs_openargs *args = data;
2379 struct compound_hdr hdr = {
2380 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2381 };
2382
2383 encode_compound_hdr(xdr, req, &hdr);
2384 encode_sequence(xdr, &args->seq_args, &hdr);
2385 encode_putfh(xdr, args->fh, &hdr);
2386 encode_open(xdr, args, &hdr);
2387 if (args->access)
2388 encode_access(xdr, args->access, &hdr);
2389 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2390 if (args->lg_args) {
2391 encode_layoutget(xdr, args->lg_args, &hdr);
2392 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2393 args->lg_args->layout.pglen,
2394 hdr.replen);
2395 }
2396 encode_nops(&hdr);
2397 }
2398
2399 /*
2400 * Encode an OPEN_DOWNGRADE request
2401 */
2402 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2403 struct xdr_stream *xdr,
2404 const void *data)
2405 {
2406 const struct nfs_closeargs *args = data;
2407 struct compound_hdr hdr = {
2408 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2409 };
2410
2411 encode_compound_hdr(xdr, req, &hdr);
2412 encode_sequence(xdr, &args->seq_args, &hdr);
2413 encode_putfh(xdr, args->fh, &hdr);
2414 if (args->lr_args)
2415 encode_layoutreturn(xdr, args->lr_args, &hdr);
2416 encode_open_downgrade(xdr, args, &hdr);
2417 encode_nops(&hdr);
2418 }
2419
2420 /*
2421 * Encode a LOCK request
2422 */
2423 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2424 const void *data)
2425 {
2426 const struct nfs_lock_args *args = data;
2427 struct compound_hdr hdr = {
2428 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2429 };
2430
2431 encode_compound_hdr(xdr, req, &hdr);
2432 encode_sequence(xdr, &args->seq_args, &hdr);
2433 encode_putfh(xdr, args->fh, &hdr);
2434 encode_lock(xdr, args, &hdr);
2435 encode_nops(&hdr);
2436 }
2437
2438 /*
2439 * Encode a LOCKT request
2440 */
2441 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2442 const void *data)
2443 {
2444 const struct nfs_lockt_args *args = data;
2445 struct compound_hdr hdr = {
2446 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2447 };
2448
2449 encode_compound_hdr(xdr, req, &hdr);
2450 encode_sequence(xdr, &args->seq_args, &hdr);
2451 encode_putfh(xdr, args->fh, &hdr);
2452 encode_lockt(xdr, args, &hdr);
2453 encode_nops(&hdr);
2454 }
2455
2456 /*
2457 * Encode a LOCKU request
2458 */
2459 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2460 const void *data)
2461 {
2462 const struct nfs_locku_args *args = data;
2463 struct compound_hdr hdr = {
2464 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2465 };
2466
2467 encode_compound_hdr(xdr, req, &hdr);
2468 encode_sequence(xdr, &args->seq_args, &hdr);
2469 encode_putfh(xdr, args->fh, &hdr);
2470 encode_locku(xdr, args, &hdr);
2471 encode_nops(&hdr);
2472 }
2473
2474 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2475 struct xdr_stream *xdr,
2476 const void *data)
2477 {
2478 const struct nfs_release_lockowner_args *args = data;
2479 struct compound_hdr hdr = {
2480 .minorversion = 0,
2481 };
2482
2483 encode_compound_hdr(xdr, req, &hdr);
2484 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2485 encode_nops(&hdr);
2486 }
2487
2488 /*
2489 * Encode a READLINK request
2490 */
2491 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2492 const void *data)
2493 {
2494 const struct nfs4_readlink *args = data;
2495 struct compound_hdr hdr = {
2496 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2497 };
2498
2499 encode_compound_hdr(xdr, req, &hdr);
2500 encode_sequence(xdr, &args->seq_args, &hdr);
2501 encode_putfh(xdr, args->fh, &hdr);
2502 encode_readlink(xdr, args, req, &hdr);
2503
2504 rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2505 args->pglen, hdr.replen);
2506 encode_nops(&hdr);
2507 }
2508
2509 /*
2510 * Encode a READDIR request
2511 */
2512 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2513 const void *data)
2514 {
2515 const struct nfs4_readdir_arg *args = data;
2516 struct compound_hdr hdr = {
2517 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2518 };
2519
2520 encode_compound_hdr(xdr, req, &hdr);
2521 encode_sequence(xdr, &args->seq_args, &hdr);
2522 encode_putfh(xdr, args->fh, &hdr);
2523 encode_readdir(xdr, args, req, &hdr);
2524
2525 rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2526 args->count, hdr.replen);
2527 encode_nops(&hdr);
2528 }
2529
2530 /*
2531 * Encode a READ request
2532 */
2533 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2534 const void *data)
2535 {
2536 const struct nfs_pgio_args *args = data;
2537 struct compound_hdr hdr = {
2538 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2539 };
2540
2541 encode_compound_hdr(xdr, req, &hdr);
2542 encode_sequence(xdr, &args->seq_args, &hdr);
2543 encode_putfh(xdr, args->fh, &hdr);
2544 encode_read(xdr, args, &hdr);
2545
2546 rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2547 args->count, hdr.replen);
2548 req->rq_rcv_buf.flags |= XDRBUF_READ;
2549 encode_nops(&hdr);
2550 }
2551
2552 /*
2553 * Encode an SETATTR request
2554 */
2555 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2556 const void *data)
2557 {
2558 const struct nfs_setattrargs *args = data;
2559 struct compound_hdr hdr = {
2560 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2561 };
2562
2563 encode_compound_hdr(xdr, req, &hdr);
2564 encode_sequence(xdr, &args->seq_args, &hdr);
2565 encode_putfh(xdr, args->fh, &hdr);
2566 encode_setattr(xdr, args, args->server, &hdr);
2567 encode_getfattr(xdr, args->bitmask, &hdr);
2568 encode_nops(&hdr);
2569 }
2570
2571 /*
2572 * Encode a GETACL request
2573 */
2574 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2575 const void *data)
2576 {
2577 const struct nfs_getaclargs *args = data;
2578 struct compound_hdr hdr = {
2579 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2580 };
2581 const __u32 nfs4_acl_bitmap[1] = {
2582 [0] = FATTR4_WORD0_ACL,
2583 };
2584 uint32_t replen;
2585
2586 encode_compound_hdr(xdr, req, &hdr);
2587 encode_sequence(xdr, &args->seq_args, &hdr);
2588 encode_putfh(xdr, args->fh, &hdr);
2589 replen = hdr.replen + op_decode_hdr_maxsz;
2590 encode_getattr(xdr, nfs4_acl_bitmap, NULL,
2591 ARRAY_SIZE(nfs4_acl_bitmap), &hdr);
2592
2593 rpc_prepare_reply_pages(req, args->acl_pages, 0,
2594 args->acl_len, replen + 1);
2595 encode_nops(&hdr);
2596 }
2597
2598 /*
2599 * Encode a WRITE request
2600 */
2601 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2602 const void *data)
2603 {
2604 const struct nfs_pgio_args *args = data;
2605 struct compound_hdr hdr = {
2606 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2607 };
2608
2609 encode_compound_hdr(xdr, req, &hdr);
2610 encode_sequence(xdr, &args->seq_args, &hdr);
2611 encode_putfh(xdr, args->fh, &hdr);
2612 encode_write(xdr, args, &hdr);
2613 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2614 if (args->bitmask)
2615 encode_getfattr(xdr, args->bitmask, &hdr);
2616 encode_nops(&hdr);
2617 }
2618
2619 /*
2620 * a COMMIT request
2621 */
2622 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2623 const void *data)
2624 {
2625 const struct nfs_commitargs *args = data;
2626 struct compound_hdr hdr = {
2627 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2628 };
2629
2630 encode_compound_hdr(xdr, req, &hdr);
2631 encode_sequence(xdr, &args->seq_args, &hdr);
2632 encode_putfh(xdr, args->fh, &hdr);
2633 encode_commit(xdr, args, &hdr);
2634 encode_nops(&hdr);
2635 }
2636
2637 /*
2638 * FSINFO request
2639 */
2640 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2641 const void *data)
2642 {
2643 const struct nfs4_fsinfo_arg *args = data;
2644 struct compound_hdr hdr = {
2645 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2646 };
2647
2648 encode_compound_hdr(xdr, req, &hdr);
2649 encode_sequence(xdr, &args->seq_args, &hdr);
2650 encode_putfh(xdr, args->fh, &hdr);
2651 encode_fsinfo(xdr, args->bitmask, &hdr);
2652 encode_nops(&hdr);
2653 }
2654
2655 /*
2656 * a PATHCONF request
2657 */
2658 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2659 const void *data)
2660 {
2661 const struct nfs4_pathconf_arg *args = data;
2662 struct compound_hdr hdr = {
2663 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2664 };
2665
2666 encode_compound_hdr(xdr, req, &hdr);
2667 encode_sequence(xdr, &args->seq_args, &hdr);
2668 encode_putfh(xdr, args->fh, &hdr);
2669 encode_getattr(xdr, nfs4_pathconf_bitmap, args->bitmask,
2670 ARRAY_SIZE(nfs4_pathconf_bitmap), &hdr);
2671 encode_nops(&hdr);
2672 }
2673
2674 /*
2675 * a STATFS request
2676 */
2677 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2678 const void *data)
2679 {
2680 const struct nfs4_statfs_arg *args = data;
2681 struct compound_hdr hdr = {
2682 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2683 };
2684
2685 encode_compound_hdr(xdr, req, &hdr);
2686 encode_sequence(xdr, &args->seq_args, &hdr);
2687 encode_putfh(xdr, args->fh, &hdr);
2688 encode_getattr(xdr, nfs4_statfs_bitmap, args->bitmask,
2689 ARRAY_SIZE(nfs4_statfs_bitmap), &hdr);
2690 encode_nops(&hdr);
2691 }
2692
2693 /*
2694 * GETATTR_BITMAP request
2695 */
2696 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2697 struct xdr_stream *xdr,
2698 const void *data)
2699 {
2700 const struct nfs4_server_caps_arg *args = data;
2701 const u32 *bitmask = args->bitmask;
2702 struct compound_hdr hdr = {
2703 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2704 };
2705
2706 encode_compound_hdr(xdr, req, &hdr);
2707 encode_sequence(xdr, &args->seq_args, &hdr);
2708 encode_putfh(xdr, args->fhandle, &hdr);
2709 encode_getattr(xdr, bitmask, NULL, 3, &hdr);
2710 encode_nops(&hdr);
2711 }
2712
2713 /*
2714 * a RENEW request
2715 */
2716 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2717 const void *data)
2718
2719 {
2720 const struct nfs_client *clp = data;
2721 struct compound_hdr hdr = {
2722 .nops = 0,
2723 };
2724
2725 encode_compound_hdr(xdr, req, &hdr);
2726 encode_renew(xdr, clp->cl_clientid, &hdr);
2727 encode_nops(&hdr);
2728 }
2729
2730 /*
2731 * a SETCLIENTID request
2732 */
2733 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2734 struct xdr_stream *xdr,
2735 const void *data)
2736 {
2737 const struct nfs4_setclientid *sc = data;
2738 struct compound_hdr hdr = {
2739 .nops = 0,
2740 };
2741
2742 encode_compound_hdr(xdr, req, &hdr);
2743 encode_setclientid(xdr, sc, &hdr);
2744 encode_nops(&hdr);
2745 }
2746
2747 /*
2748 * a SETCLIENTID_CONFIRM request
2749 */
2750 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2751 struct xdr_stream *xdr,
2752 const void *data)
2753 {
2754 const struct nfs4_setclientid_res *arg = data;
2755 struct compound_hdr hdr = {
2756 .nops = 0,
2757 };
2758
2759 encode_compound_hdr(xdr, req, &hdr);
2760 encode_setclientid_confirm(xdr, arg, &hdr);
2761 encode_nops(&hdr);
2762 }
2763
2764 /*
2765 * DELEGRETURN request
2766 */
2767 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2768 struct xdr_stream *xdr,
2769 const void *data)
2770 {
2771 const struct nfs4_delegreturnargs *args = data;
2772 struct compound_hdr hdr = {
2773 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2774 };
2775
2776 encode_compound_hdr(xdr, req, &hdr);
2777 encode_sequence(xdr, &args->seq_args, &hdr);
2778 encode_putfh(xdr, args->fhandle, &hdr);
2779 if (args->lr_args)
2780 encode_layoutreturn(xdr, args->lr_args, &hdr);
2781 if (args->bitmask)
2782 encode_getfattr(xdr, args->bitmask, &hdr);
2783 encode_delegreturn(xdr, args->stateid, &hdr);
2784 encode_nops(&hdr);
2785 }
2786
2787 /*
2788 * Encode FS_LOCATIONS request
2789 */
2790 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2791 struct xdr_stream *xdr,
2792 const void *data)
2793 {
2794 const struct nfs4_fs_locations_arg *args = data;
2795 struct compound_hdr hdr = {
2796 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2797 };
2798 uint32_t replen;
2799
2800 encode_compound_hdr(xdr, req, &hdr);
2801 encode_sequence(xdr, &args->seq_args, &hdr);
2802 if (args->migration) {
2803 encode_putfh(xdr, args->fh, &hdr);
2804 replen = hdr.replen;
2805 encode_fs_locations(xdr, args->bitmask, &hdr);
2806 if (args->renew)
2807 encode_renew(xdr, args->clientid, &hdr);
2808 } else {
2809 encode_putfh(xdr, args->dir_fh, &hdr);
2810 encode_lookup(xdr, args->name, &hdr);
2811 replen = hdr.replen;
2812 encode_fs_locations(xdr, args->bitmask, &hdr);
2813 }
2814
2815 rpc_prepare_reply_pages(req, (struct page **)&args->page, 0,
2816 PAGE_SIZE, replen + 1);
2817 encode_nops(&hdr);
2818 }
2819
2820 /*
2821 * Encode SECINFO request
2822 */
2823 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2824 struct xdr_stream *xdr,
2825 const void *data)
2826 {
2827 const struct nfs4_secinfo_arg *args = data;
2828 struct compound_hdr hdr = {
2829 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2830 };
2831
2832 encode_compound_hdr(xdr, req, &hdr);
2833 encode_sequence(xdr, &args->seq_args, &hdr);
2834 encode_putfh(xdr, args->dir_fh, &hdr);
2835 encode_secinfo(xdr, args->name, &hdr);
2836 encode_nops(&hdr);
2837 }
2838
2839 /*
2840 * Encode FSID_PRESENT request
2841 */
2842 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2843 struct xdr_stream *xdr,
2844 const void *data)
2845 {
2846 const struct nfs4_fsid_present_arg *args = data;
2847 struct compound_hdr hdr = {
2848 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2849 };
2850
2851 encode_compound_hdr(xdr, req, &hdr);
2852 encode_sequence(xdr, &args->seq_args, &hdr);
2853 encode_putfh(xdr, args->fh, &hdr);
2854 encode_getfh(xdr, &hdr);
2855 if (args->renew)
2856 encode_renew(xdr, args->clientid, &hdr);
2857 encode_nops(&hdr);
2858 }
2859
2860 #if defined(CONFIG_NFS_V4_1)
2861 /*
2862 * BIND_CONN_TO_SESSION request
2863 */
2864 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2865 struct xdr_stream *xdr,
2866 const void *data)
2867 {
2868 const struct nfs41_bind_conn_to_session_args *args = data;
2869 struct compound_hdr hdr = {
2870 .minorversion = args->client->cl_mvops->minor_version,
2871 };
2872
2873 encode_compound_hdr(xdr, req, &hdr);
2874 encode_bind_conn_to_session(xdr, args, &hdr);
2875 encode_nops(&hdr);
2876 }
2877
2878 /*
2879 * EXCHANGE_ID request
2880 */
2881 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2882 struct xdr_stream *xdr,
2883 const void *data)
2884 {
2885 const struct nfs41_exchange_id_args *args = data;
2886 struct compound_hdr hdr = {
2887 .minorversion = args->client->cl_mvops->minor_version,
2888 };
2889
2890 encode_compound_hdr(xdr, req, &hdr);
2891 encode_exchange_id(xdr, args, &hdr);
2892 encode_nops(&hdr);
2893 }
2894
2895 /*
2896 * a CREATE_SESSION request
2897 */
2898 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2899 struct xdr_stream *xdr,
2900 const void *data)
2901 {
2902 const struct nfs41_create_session_args *args = data;
2903 struct compound_hdr hdr = {
2904 .minorversion = args->client->cl_mvops->minor_version,
2905 };
2906
2907 encode_compound_hdr(xdr, req, &hdr);
2908 encode_create_session(xdr, args, &hdr);
2909 encode_nops(&hdr);
2910 }
2911
2912 /*
2913 * a DESTROY_SESSION request
2914 */
2915 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2916 struct xdr_stream *xdr,
2917 const void *data)
2918 {
2919 const struct nfs4_session *session = data;
2920 struct compound_hdr hdr = {
2921 .minorversion = session->clp->cl_mvops->minor_version,
2922 };
2923
2924 encode_compound_hdr(xdr, req, &hdr);
2925 encode_destroy_session(xdr, session, &hdr);
2926 encode_nops(&hdr);
2927 }
2928
2929 /*
2930 * a DESTROY_CLIENTID request
2931 */
2932 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2933 struct xdr_stream *xdr,
2934 const void *data)
2935 {
2936 const struct nfs_client *clp = data;
2937 struct compound_hdr hdr = {
2938 .minorversion = clp->cl_mvops->minor_version,
2939 };
2940
2941 encode_compound_hdr(xdr, req, &hdr);
2942 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2943 encode_nops(&hdr);
2944 }
2945
2946 /*
2947 * a SEQUENCE request
2948 */
2949 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2950 const void *data)
2951 {
2952 const struct nfs4_sequence_args *args = data;
2953 struct compound_hdr hdr = {
2954 .minorversion = nfs4_xdr_minorversion(args),
2955 };
2956
2957 encode_compound_hdr(xdr, req, &hdr);
2958 encode_sequence(xdr, args, &hdr);
2959 encode_nops(&hdr);
2960 }
2961
2962 #endif
2963
2964 /*
2965 * a GET_LEASE_TIME request
2966 */
2967 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2968 struct xdr_stream *xdr,
2969 const void *data)
2970 {
2971 const struct nfs4_get_lease_time_args *args = data;
2972 struct compound_hdr hdr = {
2973 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2974 };
2975 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2976
2977 encode_compound_hdr(xdr, req, &hdr);
2978 encode_sequence(xdr, &args->la_seq_args, &hdr);
2979 encode_putrootfh(xdr, &hdr);
2980 encode_fsinfo(xdr, lease_bitmap, &hdr);
2981 encode_nops(&hdr);
2982 }
2983
2984 #ifdef CONFIG_NFS_V4_1
2985
2986 /*
2987 * a RECLAIM_COMPLETE request
2988 */
2989 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2990 struct xdr_stream *xdr,
2991 const void *data)
2992 {
2993 const struct nfs41_reclaim_complete_args *args = data;
2994 struct compound_hdr hdr = {
2995 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2996 };
2997
2998 encode_compound_hdr(xdr, req, &hdr);
2999 encode_sequence(xdr, &args->seq_args, &hdr);
3000 encode_reclaim_complete(xdr, args, &hdr);
3001 encode_nops(&hdr);
3002 }
3003
3004 /*
3005 * Encode GETDEVICEINFO request
3006 */
3007 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
3008 struct xdr_stream *xdr,
3009 const void *data)
3010 {
3011 const struct nfs4_getdeviceinfo_args *args = data;
3012 struct compound_hdr hdr = {
3013 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3014 };
3015
3016 encode_compound_hdr(xdr, req, &hdr);
3017 encode_sequence(xdr, &args->seq_args, &hdr);
3018 encode_getdeviceinfo(xdr, args, &hdr);
3019
3020 /* set up reply kvec. Subtract notification bitmap max size (2)
3021 * so that notification bitmap is put in xdr_buf tail */
3022 rpc_prepare_reply_pages(req, args->pdev->pages, args->pdev->pgbase,
3023 args->pdev->pglen, hdr.replen - 2);
3024 encode_nops(&hdr);
3025 }
3026
3027 /*
3028 * Encode LAYOUTGET request
3029 */
3030 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
3031 struct xdr_stream *xdr,
3032 const void *data)
3033 {
3034 const struct nfs4_layoutget_args *args = data;
3035 struct compound_hdr hdr = {
3036 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3037 };
3038
3039 encode_compound_hdr(xdr, req, &hdr);
3040 encode_sequence(xdr, &args->seq_args, &hdr);
3041 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3042 encode_layoutget(xdr, args, &hdr);
3043
3044 rpc_prepare_reply_pages(req, args->layout.pages, 0,
3045 args->layout.pglen, hdr.replen);
3046 encode_nops(&hdr);
3047 }
3048
3049 /*
3050 * Encode LAYOUTCOMMIT request
3051 */
3052 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3053 struct xdr_stream *xdr,
3054 const void *priv)
3055 {
3056 const struct nfs4_layoutcommit_args *args = priv;
3057 struct nfs4_layoutcommit_data *data =
3058 container_of(args, struct nfs4_layoutcommit_data, args);
3059 struct compound_hdr hdr = {
3060 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3061 };
3062
3063 encode_compound_hdr(xdr, req, &hdr);
3064 encode_sequence(xdr, &args->seq_args, &hdr);
3065 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3066 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3067 encode_getfattr(xdr, args->bitmask, &hdr);
3068 encode_nops(&hdr);
3069 }
3070
3071 /*
3072 * Encode LAYOUTRETURN request
3073 */
3074 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3075 struct xdr_stream *xdr,
3076 const void *data)
3077 {
3078 const struct nfs4_layoutreturn_args *args = data;
3079 struct compound_hdr hdr = {
3080 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3081 };
3082
3083 encode_compound_hdr(xdr, req, &hdr);
3084 encode_sequence(xdr, &args->seq_args, &hdr);
3085 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3086 encode_layoutreturn(xdr, args, &hdr);
3087 encode_nops(&hdr);
3088 }
3089
3090 /*
3091 * Encode SECINFO_NO_NAME request
3092 */
3093 static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3094 struct xdr_stream *xdr,
3095 const void *data)
3096 {
3097 const struct nfs41_secinfo_no_name_args *args = data;
3098 struct compound_hdr hdr = {
3099 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3100 };
3101
3102 encode_compound_hdr(xdr, req, &hdr);
3103 encode_sequence(xdr, &args->seq_args, &hdr);
3104 encode_putrootfh(xdr, &hdr);
3105 encode_secinfo_no_name(xdr, args, &hdr);
3106 encode_nops(&hdr);
3107 }
3108
3109 /*
3110 * Encode TEST_STATEID request
3111 */
3112 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3113 struct xdr_stream *xdr,
3114 const void *data)
3115 {
3116 const struct nfs41_test_stateid_args *args = data;
3117 struct compound_hdr hdr = {
3118 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3119 };
3120
3121 encode_compound_hdr(xdr, req, &hdr);
3122 encode_sequence(xdr, &args->seq_args, &hdr);
3123 encode_test_stateid(xdr, args, &hdr);
3124 encode_nops(&hdr);
3125 }
3126
3127 /*
3128 * Encode FREE_STATEID request
3129 */
3130 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3131 struct xdr_stream *xdr,
3132 const void *data)
3133 {
3134 const struct nfs41_free_stateid_args *args = data;
3135 struct compound_hdr hdr = {
3136 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3137 };
3138
3139 encode_compound_hdr(xdr, req, &hdr);
3140 encode_sequence(xdr, &args->seq_args, &hdr);
3141 encode_free_stateid(xdr, args, &hdr);
3142 encode_nops(&hdr);
3143 }
3144 #endif /* CONFIG_NFS_V4_1 */
3145
3146 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3147 {
3148 ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3149 NFS4_OPAQUE_LIMIT);
3150 if (unlikely(ret < 0))
3151 return -EIO;
3152 *len = ret;
3153 return 0;
3154 }
3155
3156 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3157 {
3158 __be32 *p;
3159
3160 p = xdr_inline_decode(xdr, 8);
3161 if (unlikely(!p))
3162 return -EIO;
3163 hdr->status = be32_to_cpup(p++);
3164 hdr->taglen = be32_to_cpup(p);
3165
3166 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3167 if (unlikely(!p))
3168 return -EIO;
3169 hdr->tag = (char *)p;
3170 p += XDR_QUADLEN(hdr->taglen);
3171 hdr->nops = be32_to_cpup(p);
3172 if (unlikely(hdr->nops < 1))
3173 return nfs4_stat_to_errno(hdr->status);
3174 return 0;
3175 }
3176
3177 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3178 int *nfs_retval)
3179 {
3180 __be32 *p;
3181 uint32_t opnum;
3182 int32_t nfserr;
3183
3184 p = xdr_inline_decode(xdr, 8);
3185 if (unlikely(!p))
3186 goto out_overflow;
3187 opnum = be32_to_cpup(p++);
3188 if (unlikely(opnum != expected))
3189 goto out_bad_operation;
3190 if (unlikely(*p != cpu_to_be32(NFS_OK)))
3191 goto out_status;
3192 *nfs_retval = 0;
3193 return true;
3194 out_status:
3195 nfserr = be32_to_cpup(p);
3196 trace_nfs4_xdr_status(xdr, opnum, nfserr);
3197 *nfs_retval = nfs4_stat_to_errno(nfserr);
3198 return true;
3199 out_bad_operation:
3200 dprintk("nfs: Server returned operation"
3201 " %d but we issued a request for %d\n",
3202 opnum, expected);
3203 *nfs_retval = -EREMOTEIO;
3204 return false;
3205 out_overflow:
3206 *nfs_retval = -EIO;
3207 return false;
3208 }
3209
3210 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3211 {
3212 int retval;
3213
3214 __decode_op_hdr(xdr, expected, &retval);
3215 return retval;
3216 }
3217
3218 /* Dummy routine */
3219 static int decode_ace(struct xdr_stream *xdr, void *ace)
3220 {
3221 __be32 *p;
3222 unsigned int strlen;
3223 char *str;
3224
3225 p = xdr_inline_decode(xdr, 12);
3226 if (unlikely(!p))
3227 return -EIO;
3228 return decode_opaque_inline(xdr, &strlen, &str);
3229 }
3230
3231 static ssize_t
3232 decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
3233 {
3234 ssize_t ret;
3235
3236 ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
3237 if (likely(ret >= 0))
3238 return ret;
3239 if (ret != -EMSGSIZE)
3240 return -EIO;
3241 return sz;
3242 }
3243
3244 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3245 {
3246 ssize_t ret;
3247 ret = decode_bitmap4(xdr, bitmap, 3);
3248 return ret < 0 ? ret : 0;
3249 }
3250
3251 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3252 {
3253 __be32 *p;
3254
3255 p = xdr_inline_decode(xdr, 4);
3256 if (unlikely(!p))
3257 return -EIO;
3258 *attrlen = be32_to_cpup(p);
3259 *savep = xdr_stream_pos(xdr);
3260 return 0;
3261 }
3262
3263 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3264 {
3265 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3266 int ret;
3267 ret = decode_attr_bitmap(xdr, bitmask);
3268 if (unlikely(ret < 0))
3269 return ret;
3270 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3271 } else
3272 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3273 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3274 bitmask[0], bitmask[1], bitmask[2]);
3275 return 0;
3276 }
3277
3278 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3279 {
3280 __be32 *p;
3281 int ret = 0;
3282
3283 *type = 0;
3284 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3285 return -EIO;
3286 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3287 p = xdr_inline_decode(xdr, 4);
3288 if (unlikely(!p))
3289 return -EIO;
3290 *type = be32_to_cpup(p);
3291 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3292 dprintk("%s: bad type %d\n", __func__, *type);
3293 return -EIO;
3294 }
3295 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3296 ret = NFS_ATTR_FATTR_TYPE;
3297 }
3298 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3299 return ret;
3300 }
3301
3302 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3303 uint32_t *bitmap, uint32_t *type)
3304 {
3305 __be32 *p;
3306
3307 *type = 0;
3308 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3309 return -EIO;
3310 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3311 p = xdr_inline_decode(xdr, 4);
3312 if (unlikely(!p))
3313 return -EIO;
3314 *type = be32_to_cpup(p);
3315 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3316 }
3317 dprintk("%s: expire type=0x%x\n", __func__, *type);
3318 return 0;
3319 }
3320
3321 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3322 {
3323 __be32 *p;
3324 int ret = 0;
3325
3326 *change = 0;
3327 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3328 return -EIO;
3329 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3330 p = xdr_inline_decode(xdr, 8);
3331 if (unlikely(!p))
3332 return -EIO;
3333 xdr_decode_hyper(p, change);
3334 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3335 ret = NFS_ATTR_FATTR_CHANGE;
3336 }
3337 dprintk("%s: change attribute=%Lu\n", __func__,
3338 (unsigned long long)*change);
3339 return ret;
3340 }
3341
3342 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3343 {
3344 __be32 *p;
3345 int ret = 0;
3346
3347 *size = 0;
3348 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3349 return -EIO;
3350 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3351 p = xdr_inline_decode(xdr, 8);
3352 if (unlikely(!p))
3353 return -EIO;
3354 xdr_decode_hyper(p, size);
3355 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3356 ret = NFS_ATTR_FATTR_SIZE;
3357 }
3358 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3359 return ret;
3360 }
3361
3362 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3363 {
3364 __be32 *p;
3365
3366 *res = 0;
3367 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3368 return -EIO;
3369 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3370 p = xdr_inline_decode(xdr, 4);
3371 if (unlikely(!p))
3372 return -EIO;
3373 *res = be32_to_cpup(p);
3374 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3375 }
3376 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3377 return 0;
3378 }
3379
3380 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3381 {
3382 __be32 *p;
3383
3384 *res = 0;
3385 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3386 return -EIO;
3387 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3388 p = xdr_inline_decode(xdr, 4);
3389 if (unlikely(!p))
3390 return -EIO;
3391 *res = be32_to_cpup(p);
3392 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3393 }
3394 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3395 return 0;
3396 }
3397
3398 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3399 {
3400 __be32 *p;
3401 int ret = 0;
3402
3403 fsid->major = 0;
3404 fsid->minor = 0;
3405 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3406 return -EIO;
3407 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3408 p = xdr_inline_decode(xdr, 16);
3409 if (unlikely(!p))
3410 return -EIO;
3411 p = xdr_decode_hyper(p, &fsid->major);
3412 xdr_decode_hyper(p, &fsid->minor);
3413 bitmap[0] &= ~FATTR4_WORD0_FSID;
3414 ret = NFS_ATTR_FATTR_FSID;
3415 }
3416 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3417 (unsigned long long)fsid->major,
3418 (unsigned long long)fsid->minor);
3419 return ret;
3420 }
3421
3422 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3423 {
3424 __be32 *p;
3425
3426 *res = 60;
3427 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3428 return -EIO;
3429 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3430 p = xdr_inline_decode(xdr, 4);
3431 if (unlikely(!p))
3432 return -EIO;
3433 *res = be32_to_cpup(p);
3434 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3435 }
3436 dprintk("%s: lease time=%u\n", __func__, (unsigned int)*res);
3437 return 0;
3438 }
3439
3440 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3441 {
3442 __be32 *p;
3443
3444 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3445 return -EIO;
3446 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3447 p = xdr_inline_decode(xdr, 4);
3448 if (unlikely(!p))
3449 return -EIO;
3450 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3451 *res = -be32_to_cpup(p);
3452 }
3453 return 0;
3454 }
3455
3456 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3457 uint32_t *bitmap, uint32_t *bitmask)
3458 {
3459 if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3460 int ret;
3461 ret = decode_attr_bitmap(xdr, bitmask);
3462 if (unlikely(ret < 0))
3463 return ret;
3464 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3465 } else
3466 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3467 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3468 bitmask[0], bitmask[1], bitmask[2]);
3469 return 0;
3470 }
3471
3472 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3473 {
3474 __be32 *p;
3475 u32 len;
3476
3477 if (fh != NULL)
3478 memset(fh, 0, sizeof(*fh));
3479
3480 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3481 return -EIO;
3482 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3483 p = xdr_inline_decode(xdr, 4);
3484 if (unlikely(!p))
3485 return -EIO;
3486 len = be32_to_cpup(p);
3487 if (len > NFS4_FHSIZE)
3488 return -EIO;
3489 p = xdr_inline_decode(xdr, len);
3490 if (unlikely(!p))
3491 return -EIO;
3492 if (fh != NULL) {
3493 memcpy(fh->data, p, len);
3494 fh->size = len;
3495 }
3496 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3497 }
3498 return 0;
3499 }
3500
3501 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3502 {
3503 __be32 *p;
3504
3505 *res = 0;
3506 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3507 return -EIO;
3508 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3509 p = xdr_inline_decode(xdr, 4);
3510 if (unlikely(!p))
3511 return -EIO;
3512 *res = be32_to_cpup(p);
3513 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3514 }
3515 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3516 return 0;
3517 }
3518
3519 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3520 {
3521 __be32 *p;
3522 int ret = 0;
3523
3524 *fileid = 0;
3525 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3526 return -EIO;
3527 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3528 p = xdr_inline_decode(xdr, 8);
3529 if (unlikely(!p))
3530 return -EIO;
3531 xdr_decode_hyper(p, fileid);
3532 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3533 ret = NFS_ATTR_FATTR_FILEID;
3534 }
3535 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3536 return ret;
3537 }
3538
3539 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3540 {
3541 __be32 *p;
3542 int ret = 0;
3543
3544 *fileid = 0;
3545 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3546 return -EIO;
3547 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3548 p = xdr_inline_decode(xdr, 8);
3549 if (unlikely(!p))
3550 return -EIO;
3551 xdr_decode_hyper(p, fileid);
3552 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3553 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3554 }
3555 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3556 return ret;
3557 }
3558
3559 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3560 {
3561 __be32 *p;
3562 int status = 0;
3563
3564 *res = 0;
3565 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3566 return -EIO;
3567 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3568 p = xdr_inline_decode(xdr, 8);
3569 if (unlikely(!p))
3570 return -EIO;
3571 xdr_decode_hyper(p, res);
3572 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3573 }
3574 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3575 return status;
3576 }
3577
3578 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3579 {
3580 __be32 *p;
3581 int status = 0;
3582
3583 *res = 0;
3584 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3585 return -EIO;
3586 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3587 p = xdr_inline_decode(xdr, 8);
3588 if (unlikely(!p))
3589 return -EIO;
3590 xdr_decode_hyper(p, res);
3591 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3592 }
3593 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3594 return status;
3595 }
3596
3597 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3598 {
3599 __be32 *p;
3600 int status = 0;
3601
3602 *res = 0;
3603 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3604 return -EIO;
3605 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3606 p = xdr_inline_decode(xdr, 8);
3607 if (unlikely(!p))
3608 return -EIO;
3609 xdr_decode_hyper(p, res);
3610 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3611 }
3612 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3613 return status;
3614 }
3615
3616 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3617 {
3618 u32 n;
3619 __be32 *p;
3620 int status = 0;
3621
3622 p = xdr_inline_decode(xdr, 4);
3623 if (unlikely(!p))
3624 return -EIO;
3625 n = be32_to_cpup(p);
3626 if (n == 0)
3627 goto root_path;
3628 dprintk("pathname4: ");
3629 if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3630 dprintk("cannot parse %d components in path\n", n);
3631 goto out_eio;
3632 }
3633 for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3634 struct nfs4_string *component = &path->components[path->ncomponents];
3635 status = decode_opaque_inline(xdr, &component->len, &component->data);
3636 if (unlikely(status != 0))
3637 goto out_eio;
3638 ifdebug (XDR)
3639 pr_cont("%s%.*s ",
3640 (path->ncomponents != n ? "/ " : ""),
3641 component->len, component->data);
3642 }
3643 out:
3644 return status;
3645 root_path:
3646 /* a root pathname is sent as a zero component4 */
3647 path->ncomponents = 1;
3648 path->components[0].len=0;
3649 path->components[0].data=NULL;
3650 dprintk("pathname4: /\n");
3651 goto out;
3652 out_eio:
3653 dprintk(" status %d", status);
3654 status = -EIO;
3655 goto out;
3656 }
3657
3658 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3659 {
3660 int n;
3661 __be32 *p;
3662 int status = -EIO;
3663
3664 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3665 goto out;
3666 status = 0;
3667 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3668 goto out;
3669 bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3670 status = -EIO;
3671 /* Ignore borken servers that return unrequested attrs */
3672 if (unlikely(res == NULL))
3673 goto out;
3674 dprintk("%s: fsroot:\n", __func__);
3675 status = decode_pathname(xdr, &res->fs_path);
3676 if (unlikely(status != 0))
3677 goto out;
3678 p = xdr_inline_decode(xdr, 4);
3679 if (unlikely(!p))
3680 goto out_eio;
3681 n = be32_to_cpup(p);
3682 if (n <= 0)
3683 goto out_eio;
3684 for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3685 u32 m;
3686 struct nfs4_fs_location *loc;
3687
3688 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3689 break;
3690 loc = &res->locations[res->nlocations];
3691 p = xdr_inline_decode(xdr, 4);
3692 if (unlikely(!p))
3693 goto out_eio;
3694 m = be32_to_cpup(p);
3695
3696 dprintk("%s: servers:\n", __func__);
3697 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3698 struct nfs4_string *server;
3699
3700 if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3701 unsigned int i;
3702 dprintk("%s: using first %u of %u servers "
3703 "returned for location %u\n",
3704 __func__,
3705 NFS4_FS_LOCATION_MAXSERVERS,
3706 m, res->nlocations);
3707 for (i = loc->nservers; i < m; i++) {
3708 unsigned int len;
3709 char *data;
3710 status = decode_opaque_inline(xdr, &len, &data);
3711 if (unlikely(status != 0))
3712 goto out_eio;
3713 }
3714 break;
3715 }
3716 server = &loc->servers[loc->nservers];
3717 status = decode_opaque_inline(xdr, &server->len, &server->data);
3718 if (unlikely(status != 0))
3719 goto out_eio;
3720 dprintk("%s ", server->data);
3721 }
3722 status = decode_pathname(xdr, &loc->rootpath);
3723 if (unlikely(status != 0))
3724 goto out_eio;
3725 }
3726 if (res->nlocations != 0)
3727 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3728 out:
3729 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3730 return status;
3731 out_eio:
3732 status = -EIO;
3733 goto out;
3734 }
3735
3736 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3737 {
3738 __be32 *p;
3739 int status = 0;
3740
3741 *res = 0;
3742 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3743 return -EIO;
3744 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3745 p = xdr_inline_decode(xdr, 8);
3746 if (unlikely(!p))
3747 return -EIO;
3748 xdr_decode_hyper(p, res);
3749 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3750 }
3751 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3752 return status;
3753 }
3754
3755 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3756 {
3757 __be32 *p;
3758 int status = 0;
3759
3760 *maxlink = 1;
3761 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3762 return -EIO;
3763 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3764 p = xdr_inline_decode(xdr, 4);
3765 if (unlikely(!p))
3766 return -EIO;
3767 *maxlink = be32_to_cpup(p);
3768 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3769 }
3770 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3771 return status;
3772 }
3773
3774 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3775 {
3776 __be32 *p;
3777 int status = 0;
3778
3779 *maxname = 1024;
3780 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3781 return -EIO;
3782 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3783 p = xdr_inline_decode(xdr, 4);
3784 if (unlikely(!p))
3785 return -EIO;
3786 *maxname = be32_to_cpup(p);
3787 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3788 }
3789 dprintk("%s: maxname=%u\n", __func__, *maxname);
3790 return status;
3791 }
3792
3793 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3794 {
3795 __be32 *p;
3796 int status = 0;
3797
3798 *res = 1024;
3799 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3800 return -EIO;
3801 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3802 uint64_t maxread;
3803 p = xdr_inline_decode(xdr, 8);
3804 if (unlikely(!p))
3805 return -EIO;
3806 xdr_decode_hyper(p, &maxread);
3807 if (maxread > 0x7FFFFFFF)
3808 maxread = 0x7FFFFFFF;
3809 *res = (uint32_t)maxread;
3810 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3811 }
3812 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3813 return status;
3814 }
3815
3816 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3817 {
3818 __be32 *p;
3819 int status = 0;
3820
3821 *res = 1024;
3822 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3823 return -EIO;
3824 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3825 uint64_t maxwrite;
3826 p = xdr_inline_decode(xdr, 8);
3827 if (unlikely(!p))
3828 return -EIO;
3829 xdr_decode_hyper(p, &maxwrite);
3830 if (maxwrite > 0x7FFFFFFF)
3831 maxwrite = 0x7FFFFFFF;
3832 *res = (uint32_t)maxwrite;
3833 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3834 }
3835 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3836 return status;
3837 }
3838
3839 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3840 {
3841 uint32_t tmp;
3842 __be32 *p;
3843 int ret = 0;
3844
3845 *mode = 0;
3846 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3847 return -EIO;
3848 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3849 p = xdr_inline_decode(xdr, 4);
3850 if (unlikely(!p))
3851 return -EIO;
3852 tmp = be32_to_cpup(p);
3853 *mode = tmp & ~S_IFMT;
3854 bitmap[1] &= ~FATTR4_WORD1_MODE;
3855 ret = NFS_ATTR_FATTR_MODE;
3856 }
3857 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3858 return ret;
3859 }
3860
3861 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3862 {
3863 __be32 *p;
3864 int ret = 0;
3865
3866 *nlink = 1;
3867 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3868 return -EIO;
3869 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3870 p = xdr_inline_decode(xdr, 4);
3871 if (unlikely(!p))
3872 return -EIO;
3873 *nlink = be32_to_cpup(p);
3874 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3875 ret = NFS_ATTR_FATTR_NLINK;
3876 }
3877 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3878 return ret;
3879 }
3880
3881 static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3882 struct nfs4_string *name, gfp_t gfp_flags)
3883 {
3884 ssize_t ret;
3885
3886 ret = xdr_stream_decode_string_dup(xdr, &name->data,
3887 XDR_MAX_NETOBJ, gfp_flags);
3888 name->len = 0;
3889 if (ret > 0)
3890 name->len = ret;
3891 return ret;
3892 }
3893
3894 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3895 const struct nfs_server *server, kuid_t *uid,
3896 struct nfs4_string *owner_name)
3897 {
3898 ssize_t len;
3899 char *p;
3900
3901 *uid = make_kuid(&init_user_ns, -2);
3902 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3903 return -EIO;
3904 if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3905 return 0;
3906 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3907
3908 if (owner_name != NULL) {
3909 len = decode_nfs4_string(xdr, owner_name, GFP_NOIO);
3910 if (len <= 0)
3911 goto out;
3912 dprintk("%s: name=%s\n", __func__, owner_name->data);
3913 return NFS_ATTR_FATTR_OWNER_NAME;
3914 } else {
3915 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3916 XDR_MAX_NETOBJ);
3917 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3918 goto out;
3919 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3920 return NFS_ATTR_FATTR_OWNER;
3921 }
3922 out:
3923 if (len == -EBADMSG)
3924 return -EIO;
3925 return 0;
3926 }
3927
3928 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3929 const struct nfs_server *server, kgid_t *gid,
3930 struct nfs4_string *group_name)
3931 {
3932 ssize_t len;
3933 char *p;
3934
3935 *gid = make_kgid(&init_user_ns, -2);
3936 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3937 return -EIO;
3938 if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
3939 return 0;
3940 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3941
3942 if (group_name != NULL) {
3943 len = decode_nfs4_string(xdr, group_name, GFP_NOIO);
3944 if (len <= 0)
3945 goto out;
3946 dprintk("%s: name=%s\n", __func__, group_name->data);
3947 return NFS_ATTR_FATTR_GROUP_NAME;
3948 } else {
3949 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3950 XDR_MAX_NETOBJ);
3951 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
3952 goto out;
3953 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3954 return NFS_ATTR_FATTR_GROUP;
3955 }
3956 out:
3957 if (len == -EBADMSG)
3958 return -EIO;
3959 return 0;
3960 }
3961
3962 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3963 {
3964 uint32_t major = 0, minor = 0;
3965 __be32 *p;
3966 int ret = 0;
3967
3968 *rdev = MKDEV(0,0);
3969 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3970 return -EIO;
3971 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3972 dev_t tmp;
3973
3974 p = xdr_inline_decode(xdr, 8);
3975 if (unlikely(!p))
3976 return -EIO;
3977 major = be32_to_cpup(p++);
3978 minor = be32_to_cpup(p);
3979 tmp = MKDEV(major, minor);
3980 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3981 *rdev = tmp;
3982 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3983 ret = NFS_ATTR_FATTR_RDEV;
3984 }
3985 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3986 return ret;
3987 }
3988
3989 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3990 {
3991 __be32 *p;
3992 int status = 0;
3993
3994 *res = 0;
3995 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3996 return -EIO;
3997 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3998 p = xdr_inline_decode(xdr, 8);
3999 if (unlikely(!p))
4000 return -EIO;
4001 xdr_decode_hyper(p, res);
4002 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4003 }
4004 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4005 return status;
4006 }
4007
4008 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4009 {
4010 __be32 *p;
4011 int status = 0;
4012
4013 *res = 0;
4014 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4015 return -EIO;
4016 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4017 p = xdr_inline_decode(xdr, 8);
4018 if (unlikely(!p))
4019 return -EIO;
4020 xdr_decode_hyper(p, res);
4021 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4022 }
4023 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4024 return status;
4025 }
4026
4027 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4028 {
4029 __be32 *p;
4030 int status = 0;
4031
4032 *res = 0;
4033 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4034 return -EIO;
4035 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4036 p = xdr_inline_decode(xdr, 8);
4037 if (unlikely(!p))
4038 return -EIO;
4039 xdr_decode_hyper(p, res);
4040 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4041 }
4042 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4043 return status;
4044 }
4045
4046 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4047 {
4048 __be32 *p;
4049 int ret = 0;
4050
4051 *used = 0;
4052 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4053 return -EIO;
4054 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4055 p = xdr_inline_decode(xdr, 8);
4056 if (unlikely(!p))
4057 return -EIO;
4058 xdr_decode_hyper(p, used);
4059 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4060 ret = NFS_ATTR_FATTR_SPACE_USED;
4061 }
4062 dprintk("%s: space used=%Lu\n", __func__,
4063 (unsigned long long)*used);
4064 return ret;
4065 }
4066
4067 static __be32 *
4068 xdr_decode_nfstime4(__be32 *p, struct timespec *t)
4069 {
4070 __u64 sec;
4071
4072 p = xdr_decode_hyper(p, &sec);
4073 t-> tv_sec = (time_t)sec;
4074 t->tv_nsec = be32_to_cpup(p++);
4075 return p;
4076 }
4077
4078 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4079 {
4080 __be32 *p;
4081
4082 p = xdr_inline_decode(xdr, nfstime4_maxsz << 2);
4083 if (unlikely(!p))
4084 return -EIO;
4085 xdr_decode_nfstime4(p, time);
4086 return 0;
4087 }
4088
4089 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4090 {
4091 int status = 0;
4092
4093 time->tv_sec = 0;
4094 time->tv_nsec = 0;
4095 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4096 return -EIO;
4097 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4098 status = decode_attr_time(xdr, time);
4099 if (status == 0)
4100 status = NFS_ATTR_FATTR_ATIME;
4101 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4102 }
4103 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4104 return status;
4105 }
4106
4107 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4108 {
4109 int status = 0;
4110
4111 time->tv_sec = 0;
4112 time->tv_nsec = 0;
4113 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4114 return -EIO;
4115 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4116 status = decode_attr_time(xdr, time);
4117 if (status == 0)
4118 status = NFS_ATTR_FATTR_CTIME;
4119 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4120 }
4121 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4122 return status;
4123 }
4124
4125 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4126 struct timespec *time)
4127 {
4128 int status = 0;
4129
4130 time->tv_sec = 0;
4131 time->tv_nsec = 0;
4132 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4133 return -EIO;
4134 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4135 status = decode_attr_time(xdr, time);
4136 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4137 }
4138 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4139 (long)time->tv_nsec);
4140 return status;
4141 }
4142
4143 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4144 struct nfs4_label *label)
4145 {
4146 uint32_t pi = 0;
4147 uint32_t lfs = 0;
4148 __u32 len;
4149 __be32 *p;
4150 int status = 0;
4151
4152 if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4153 return -EIO;
4154 if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4155 p = xdr_inline_decode(xdr, 4);
4156 if (unlikely(!p))
4157 return -EIO;
4158 lfs = be32_to_cpup(p++);
4159 p = xdr_inline_decode(xdr, 4);
4160 if (unlikely(!p))
4161 return -EIO;
4162 pi = be32_to_cpup(p++);
4163 p = xdr_inline_decode(xdr, 4);
4164 if (unlikely(!p))
4165 return -EIO;
4166 len = be32_to_cpup(p++);
4167 p = xdr_inline_decode(xdr, len);
4168 if (unlikely(!p))
4169 return -EIO;
4170 if (len < NFS4_MAXLABELLEN) {
4171 if (label) {
4172 memcpy(label->label, p, len);
4173 label->len = len;
4174 label->pi = pi;
4175 label->lfs = lfs;
4176 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4177 }
4178 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4179 } else
4180 printk(KERN_WARNING "%s: label too long (%u)!\n",
4181 __func__, len);
4182 }
4183 if (label && label->label)
4184 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4185 (char *)label->label, label->len, label->pi, label->lfs);
4186 return status;
4187 }
4188
4189 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4190 {
4191 int status = 0;
4192
4193 time->tv_sec = 0;
4194 time->tv_nsec = 0;
4195 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4196 return -EIO;
4197 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4198 status = decode_attr_time(xdr, time);
4199 if (status == 0)
4200 status = NFS_ATTR_FATTR_MTIME;
4201 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4202 }
4203 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4204 return status;
4205 }
4206
4207 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4208 {
4209 unsigned int attrwords = XDR_QUADLEN(attrlen);
4210 unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4211
4212 if (unlikely(attrwords != nwords)) {
4213 dprintk("%s: server returned incorrect attribute length: "
4214 "%u %c %u\n",
4215 __func__,
4216 attrwords << 2,
4217 (attrwords < nwords) ? '<' : '>',
4218 nwords << 2);
4219 return -EIO;
4220 }
4221 return 0;
4222 }
4223
4224 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4225 {
4226 __be32 *p;
4227
4228 p = xdr_inline_decode(xdr, 20);
4229 if (unlikely(!p))
4230 return -EIO;
4231 cinfo->atomic = be32_to_cpup(p++);
4232 p = xdr_decode_hyper(p, &cinfo->before);
4233 xdr_decode_hyper(p, &cinfo->after);
4234 return 0;
4235 }
4236
4237 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4238 {
4239 __be32 *p;
4240 uint32_t supp, acc;
4241 int status;
4242
4243 status = decode_op_hdr(xdr, OP_ACCESS);
4244 if (status)
4245 return status;
4246 p = xdr_inline_decode(xdr, 8);
4247 if (unlikely(!p))
4248 return -EIO;
4249 supp = be32_to_cpup(p++);
4250 acc = be32_to_cpup(p);
4251 *supported = supp;
4252 *access = acc;
4253 return 0;
4254 }
4255
4256 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4257 {
4258 ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4259 if (unlikely(ret < 0))
4260 return -EIO;
4261 return 0;
4262 }
4263
4264 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4265 {
4266 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4267 }
4268
4269 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4270 {
4271 stateid->type = NFS4_OPEN_STATEID_TYPE;
4272 return decode_stateid(xdr, stateid);
4273 }
4274
4275 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4276 {
4277 stateid->type = NFS4_LOCK_STATEID_TYPE;
4278 return decode_stateid(xdr, stateid);
4279 }
4280
4281 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4282 {
4283 stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4284 return decode_stateid(xdr, stateid);
4285 }
4286
4287 static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4288 {
4289 nfs4_stateid dummy;
4290
4291 nfs4_stateid_copy(stateid, &invalid_stateid);
4292 return decode_stateid(xdr, &dummy);
4293 }
4294
4295 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4296 {
4297 int status;
4298
4299 status = decode_op_hdr(xdr, OP_CLOSE);
4300 if (status != -EIO)
4301 nfs_increment_open_seqid(status, res->seqid);
4302 if (!status)
4303 status = decode_invalid_stateid(xdr, &res->stateid);
4304 return status;
4305 }
4306
4307 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4308 {
4309 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4310 }
4311
4312 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4313 {
4314 return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4315 }
4316
4317 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4318 {
4319 int status;
4320
4321 status = decode_op_hdr(xdr, OP_COMMIT);
4322 if (!status)
4323 status = decode_write_verifier(xdr, &res->verf->verifier);
4324 return status;
4325 }
4326
4327 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4328 {
4329 __be32 *p;
4330 uint32_t bmlen;
4331 int status;
4332
4333 status = decode_op_hdr(xdr, OP_CREATE);
4334 if (status)
4335 return status;
4336 if ((status = decode_change_info(xdr, cinfo)))
4337 return status;
4338 p = xdr_inline_decode(xdr, 4);
4339 if (unlikely(!p))
4340 return -EIO;
4341 bmlen = be32_to_cpup(p);
4342 p = xdr_inline_decode(xdr, bmlen << 2);
4343 if (likely(p))
4344 return 0;
4345 return -EIO;
4346 }
4347
4348 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4349 {
4350 unsigned int savep;
4351 uint32_t attrlen, bitmap[3] = {0};
4352 int status;
4353
4354 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4355 goto xdr_error;
4356 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4357 goto xdr_error;
4358 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4359 goto xdr_error;
4360 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4361 goto xdr_error;
4362 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4363 &res->fh_expire_type)) != 0)
4364 goto xdr_error;
4365 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4366 goto xdr_error;
4367 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4368 goto xdr_error;
4369 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4370 goto xdr_error;
4371 if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4372 res->exclcreat_bitmask)) != 0)
4373 goto xdr_error;
4374 status = verify_attr_len(xdr, savep, attrlen);
4375 xdr_error:
4376 dprintk("%s: xdr returned %d!\n", __func__, -status);
4377 return status;
4378 }
4379
4380 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4381 {
4382 unsigned int savep;
4383 uint32_t attrlen, bitmap[3] = {0};
4384 int status;
4385
4386 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4387 goto xdr_error;
4388 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4389 goto xdr_error;
4390 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4391 goto xdr_error;
4392
4393 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4394 goto xdr_error;
4395 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4396 goto xdr_error;
4397 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4398 goto xdr_error;
4399
4400 status = -EIO;
4401 if (unlikely(bitmap[0]))
4402 goto xdr_error;
4403
4404 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4405 goto xdr_error;
4406 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4407 goto xdr_error;
4408 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4409 goto xdr_error;
4410
4411 status = verify_attr_len(xdr, savep, attrlen);
4412 xdr_error:
4413 dprintk("%s: xdr returned %d!\n", __func__, -status);
4414 return status;
4415 }
4416
4417 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4418 {
4419 unsigned int savep;
4420 uint32_t attrlen, bitmap[3] = {0};
4421 int status;
4422
4423 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4424 goto xdr_error;
4425 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4426 goto xdr_error;
4427 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4428 goto xdr_error;
4429
4430 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4431 goto xdr_error;
4432 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4433 goto xdr_error;
4434
4435 status = verify_attr_len(xdr, savep, attrlen);
4436 xdr_error:
4437 dprintk("%s: xdr returned %d!\n", __func__, -status);
4438 return status;
4439 }
4440
4441 static int decode_threshold_hint(struct xdr_stream *xdr,
4442 uint32_t *bitmap,
4443 uint64_t *res,
4444 uint32_t hint_bit)
4445 {
4446 __be32 *p;
4447
4448 *res = 0;
4449 if (likely(bitmap[0] & hint_bit)) {
4450 p = xdr_inline_decode(xdr, 8);
4451 if (unlikely(!p))
4452 return -EIO;
4453 xdr_decode_hyper(p, res);
4454 }
4455 return 0;
4456 }
4457
4458 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4459 struct nfs4_threshold *res)
4460 {
4461 __be32 *p;
4462 unsigned int savep;
4463 uint32_t bitmap[3] = {0,}, attrlen;
4464 int status;
4465
4466 /* layout type */
4467 p = xdr_inline_decode(xdr, 4);
4468 if (unlikely(!p))
4469 return -EIO;
4470 res->l_type = be32_to_cpup(p);
4471
4472 /* thi_hintset bitmap */
4473 status = decode_attr_bitmap(xdr, bitmap);
4474 if (status < 0)
4475 goto xdr_error;
4476
4477 /* thi_hintlist length */
4478 status = decode_attr_length(xdr, &attrlen, &savep);
4479 if (status < 0)
4480 goto xdr_error;
4481 /* thi_hintlist */
4482 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4483 if (status < 0)
4484 goto xdr_error;
4485 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4486 if (status < 0)
4487 goto xdr_error;
4488 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4489 THRESHOLD_RD_IO);
4490 if (status < 0)
4491 goto xdr_error;
4492 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4493 THRESHOLD_WR_IO);
4494 if (status < 0)
4495 goto xdr_error;
4496
4497 status = verify_attr_len(xdr, savep, attrlen);
4498 res->bm = bitmap[0];
4499
4500 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4501 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4502 res->wr_io_sz);
4503 xdr_error:
4504 dprintk("%s ret=%d!\n", __func__, status);
4505 return status;
4506 }
4507
4508 /*
4509 * Thresholds on pNFS direct I/O vrs MDS I/O
4510 */
4511 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4512 uint32_t *bitmap,
4513 struct nfs4_threshold *res)
4514 {
4515 __be32 *p;
4516 int status = 0;
4517 uint32_t num;
4518
4519 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4520 return -EIO;
4521 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4522 /* Did the server return an unrequested attribute? */
4523 if (unlikely(res == NULL))
4524 return -EREMOTEIO;
4525 p = xdr_inline_decode(xdr, 4);
4526 if (unlikely(!p))
4527 return -EIO;
4528 num = be32_to_cpup(p);
4529 if (num == 0)
4530 return 0;
4531 if (num > 1)
4532 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4533 "drivers per filesystem not supported\n",
4534 __func__);
4535
4536 status = decode_first_threshold_item4(xdr, res);
4537 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4538 }
4539 return status;
4540 }
4541
4542 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4543 struct nfs_fattr *fattr, struct nfs_fh *fh,
4544 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4545 const struct nfs_server *server)
4546 {
4547 int status;
4548 umode_t fmode = 0;
4549 uint32_t type;
4550 int32_t err;
4551
4552 status = decode_attr_type(xdr, bitmap, &type);
4553 if (status < 0)
4554 goto xdr_error;
4555 fattr->mode = 0;
4556 if (status != 0) {
4557 fattr->mode |= nfs_type2fmt[type];
4558 fattr->valid |= status;
4559 }
4560
4561 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4562 if (status < 0)
4563 goto xdr_error;
4564 fattr->valid |= status;
4565
4566 status = decode_attr_size(xdr, bitmap, &fattr->size);
4567 if (status < 0)
4568 goto xdr_error;
4569 fattr->valid |= status;
4570
4571 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4572 if (status < 0)
4573 goto xdr_error;
4574 fattr->valid |= status;
4575
4576 err = 0;
4577 status = decode_attr_error(xdr, bitmap, &err);
4578 if (status < 0)
4579 goto xdr_error;
4580
4581 status = decode_attr_filehandle(xdr, bitmap, fh);
4582 if (status < 0)
4583 goto xdr_error;
4584
4585 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4586 if (status < 0)
4587 goto xdr_error;
4588 fattr->valid |= status;
4589
4590 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4591 if (status < 0)
4592 goto xdr_error;
4593 fattr->valid |= status;
4594
4595 status = -EIO;
4596 if (unlikely(bitmap[0]))
4597 goto xdr_error;
4598
4599 status = decode_attr_mode(xdr, bitmap, &fmode);
4600 if (status < 0)
4601 goto xdr_error;
4602 if (status != 0) {
4603 fattr->mode |= fmode;
4604 fattr->valid |= status;
4605 }
4606
4607 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4608 if (status < 0)
4609 goto xdr_error;
4610 fattr->valid |= status;
4611
4612 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4613 if (status < 0)
4614 goto xdr_error;
4615 fattr->valid |= status;
4616
4617 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4618 if (status < 0)
4619 goto xdr_error;
4620 fattr->valid |= status;
4621
4622 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4623 if (status < 0)
4624 goto xdr_error;
4625 fattr->valid |= status;
4626
4627 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4628 if (status < 0)
4629 goto xdr_error;
4630 fattr->valid |= status;
4631
4632 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4633 if (status < 0)
4634 goto xdr_error;
4635 fattr->valid |= status;
4636
4637 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4638 if (status < 0)
4639 goto xdr_error;
4640 fattr->valid |= status;
4641
4642 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4643 if (status < 0)
4644 goto xdr_error;
4645 fattr->valid |= status;
4646
4647 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4648 if (status < 0)
4649 goto xdr_error;
4650 fattr->valid |= status;
4651
4652 status = -EIO;
4653 if (unlikely(bitmap[1]))
4654 goto xdr_error;
4655
4656 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4657 if (status < 0)
4658 goto xdr_error;
4659
4660 if (label) {
4661 status = decode_attr_security_label(xdr, bitmap, label);
4662 if (status < 0)
4663 goto xdr_error;
4664 fattr->valid |= status;
4665 }
4666
4667 xdr_error:
4668 dprintk("%s: xdr returned %d\n", __func__, -status);
4669 return status;
4670 }
4671
4672 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4673 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4674 struct nfs4_label *label, const struct nfs_server *server)
4675 {
4676 unsigned int savep;
4677 uint32_t attrlen,
4678 bitmap[3] = {0};
4679 int status;
4680
4681 status = decode_op_hdr(xdr, OP_GETATTR);
4682 if (status < 0)
4683 goto xdr_error;
4684
4685 status = decode_attr_bitmap(xdr, bitmap);
4686 if (status < 0)
4687 goto xdr_error;
4688
4689 status = decode_attr_length(xdr, &attrlen, &savep);
4690 if (status < 0)
4691 goto xdr_error;
4692
4693 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4694 label, server);
4695 if (status < 0)
4696 goto xdr_error;
4697
4698 status = verify_attr_len(xdr, savep, attrlen);
4699 xdr_error:
4700 dprintk("%s: xdr returned %d\n", __func__, -status);
4701 return status;
4702 }
4703
4704 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4705 struct nfs4_label *label, const struct nfs_server *server)
4706 {
4707 return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4708 }
4709
4710 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4711 const struct nfs_server *server)
4712 {
4713 return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4714 }
4715
4716 /*
4717 * Decode potentially multiple layout types.
4718 */
4719 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4720 struct nfs_fsinfo *fsinfo)
4721 {
4722 __be32 *p;
4723 uint32_t i;
4724
4725 p = xdr_inline_decode(xdr, 4);
4726 if (unlikely(!p))
4727 return -EIO;
4728 fsinfo->nlayouttypes = be32_to_cpup(p);
4729
4730 /* pNFS is not supported by the underlying file system */
4731 if (fsinfo->nlayouttypes == 0)
4732 return 0;
4733
4734 /* Decode and set first layout type, move xdr->p past unused types */
4735 p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4736 if (unlikely(!p))
4737 return -EIO;
4738
4739 /* If we get too many, then just cap it at the max */
4740 if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4741 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4742 __func__, fsinfo->nlayouttypes);
4743 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4744 }
4745
4746 for(i = 0; i < fsinfo->nlayouttypes; ++i)
4747 fsinfo->layouttype[i] = be32_to_cpup(p++);
4748 return 0;
4749 }
4750
4751 /*
4752 * The type of file system exported.
4753 * Note we must ensure that layouttype is set in any non-error case.
4754 */
4755 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4756 struct nfs_fsinfo *fsinfo)
4757 {
4758 int status = 0;
4759
4760 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4761 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4762 return -EIO;
4763 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4764 status = decode_pnfs_layout_types(xdr, fsinfo);
4765 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4766 }
4767 return status;
4768 }
4769
4770 /*
4771 * The prefered block size for layout directed io
4772 */
4773 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4774 uint32_t *res)
4775 {
4776 __be32 *p;
4777
4778 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4779 *res = 0;
4780 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4781 p = xdr_inline_decode(xdr, 4);
4782 if (unlikely(!p))
4783 return -EIO;
4784 *res = be32_to_cpup(p);
4785 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4786 }
4787 return 0;
4788 }
4789
4790 /*
4791 * The granularity of a CLONE operation.
4792 */
4793 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4794 uint32_t *res)
4795 {
4796 __be32 *p;
4797
4798 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4799 *res = 0;
4800 if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4801 p = xdr_inline_decode(xdr, 4);
4802 if (unlikely(!p))
4803 return -EIO;
4804 *res = be32_to_cpup(p);
4805 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4806 }
4807 return 0;
4808 }
4809
4810 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4811 {
4812 unsigned int savep;
4813 uint32_t attrlen, bitmap[3];
4814 int status;
4815
4816 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4817 goto xdr_error;
4818 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4819 goto xdr_error;
4820 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4821 goto xdr_error;
4822
4823 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4824
4825 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4826 goto xdr_error;
4827 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4828 goto xdr_error;
4829 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4830 goto xdr_error;
4831 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4832 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4833 goto xdr_error;
4834 fsinfo->wtpref = fsinfo->wtmax;
4835
4836 status = -EIO;
4837 if (unlikely(bitmap[0]))
4838 goto xdr_error;
4839
4840 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4841 if (status != 0)
4842 goto xdr_error;
4843 status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4844 if (status != 0)
4845 goto xdr_error;
4846
4847 status = -EIO;
4848 if (unlikely(bitmap[1]))
4849 goto xdr_error;
4850
4851 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4852 if (status)
4853 goto xdr_error;
4854 status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4855 if (status)
4856 goto xdr_error;
4857
4858 status = verify_attr_len(xdr, savep, attrlen);
4859 xdr_error:
4860 dprintk("%s: xdr returned %d!\n", __func__, -status);
4861 return status;
4862 }
4863
4864 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4865 {
4866 __be32 *p;
4867 uint32_t len;
4868 int status;
4869
4870 /* Zero handle first to allow comparisons */
4871 memset(fh, 0, sizeof(*fh));
4872
4873 status = decode_op_hdr(xdr, OP_GETFH);
4874 if (status)
4875 return status;
4876
4877 p = xdr_inline_decode(xdr, 4);
4878 if (unlikely(!p))
4879 return -EIO;
4880 len = be32_to_cpup(p);
4881 if (len > NFS4_FHSIZE)
4882 return -EIO;
4883 fh->size = len;
4884 p = xdr_inline_decode(xdr, len);
4885 if (unlikely(!p))
4886 return -EIO;
4887 memcpy(fh->data, p, len);
4888 return 0;
4889 }
4890
4891 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4892 {
4893 int status;
4894
4895 status = decode_op_hdr(xdr, OP_LINK);
4896 if (status)
4897 return status;
4898 return decode_change_info(xdr, cinfo);
4899 }
4900
4901 /*
4902 * We create the owner, so we know a proper owner.id length is 4.
4903 */
4904 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4905 {
4906 uint64_t offset, length, clientid;
4907 __be32 *p;
4908 uint32_t namelen, type;
4909
4910 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4911 if (unlikely(!p))
4912 return -EIO;
4913 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4914 p = xdr_decode_hyper(p, &length);
4915 type = be32_to_cpup(p++); /* 4 byte read */
4916 if (fl != NULL) { /* manipulate file lock */
4917 fl->fl_start = (loff_t)offset;
4918 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4919 if (length == ~(uint64_t)0)
4920 fl->fl_end = OFFSET_MAX;
4921 fl->fl_type = F_WRLCK;
4922 if (type & 1)
4923 fl->fl_type = F_RDLCK;
4924 fl->fl_pid = 0;
4925 }
4926 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4927 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4928 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4929 if (likely(!p))
4930 return -EIO;
4931 return -NFS4ERR_DENIED;
4932 }
4933
4934 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4935 {
4936 int status;
4937
4938 status = decode_op_hdr(xdr, OP_LOCK);
4939 if (status == -EIO)
4940 goto out;
4941 if (status == 0) {
4942 status = decode_lock_stateid(xdr, &res->stateid);
4943 if (unlikely(status))
4944 goto out;
4945 } else if (status == -NFS4ERR_DENIED)
4946 status = decode_lock_denied(xdr, NULL);
4947 if (res->open_seqid != NULL)
4948 nfs_increment_open_seqid(status, res->open_seqid);
4949 nfs_increment_lock_seqid(status, res->lock_seqid);
4950 out:
4951 return status;
4952 }
4953
4954 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4955 {
4956 int status;
4957 status = decode_op_hdr(xdr, OP_LOCKT);
4958 if (status == -NFS4ERR_DENIED)
4959 return decode_lock_denied(xdr, res->denied);
4960 return status;
4961 }
4962
4963 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4964 {
4965 int status;
4966
4967 status = decode_op_hdr(xdr, OP_LOCKU);
4968 if (status != -EIO)
4969 nfs_increment_lock_seqid(status, res->seqid);
4970 if (status == 0)
4971 status = decode_lock_stateid(xdr, &res->stateid);
4972 return status;
4973 }
4974
4975 static int decode_release_lockowner(struct xdr_stream *xdr)
4976 {
4977 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4978 }
4979
4980 static int decode_lookup(struct xdr_stream *xdr)
4981 {
4982 return decode_op_hdr(xdr, OP_LOOKUP);
4983 }
4984
4985 static int decode_lookupp(struct xdr_stream *xdr)
4986 {
4987 return decode_op_hdr(xdr, OP_LOOKUPP);
4988 }
4989
4990 /* This is too sick! */
4991 static int decode_space_limit(struct xdr_stream *xdr,
4992 unsigned long *pagemod_limit)
4993 {
4994 __be32 *p;
4995 uint32_t limit_type, nblocks, blocksize;
4996 u64 maxsize = 0;
4997
4998 p = xdr_inline_decode(xdr, 12);
4999 if (unlikely(!p))
5000 return -EIO;
5001 limit_type = be32_to_cpup(p++);
5002 switch (limit_type) {
5003 case NFS4_LIMIT_SIZE:
5004 xdr_decode_hyper(p, &maxsize);
5005 break;
5006 case NFS4_LIMIT_BLOCKS:
5007 nblocks = be32_to_cpup(p++);
5008 blocksize = be32_to_cpup(p);
5009 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5010 }
5011 maxsize >>= PAGE_SHIFT;
5012 *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5013 return 0;
5014 }
5015
5016 static int decode_rw_delegation(struct xdr_stream *xdr,
5017 uint32_t delegation_type,
5018 struct nfs_openres *res)
5019 {
5020 __be32 *p;
5021 int status;
5022
5023 status = decode_delegation_stateid(xdr, &res->delegation);
5024 if (unlikely(status))
5025 return status;
5026 p = xdr_inline_decode(xdr, 4);
5027 if (unlikely(!p))
5028 return -EIO;
5029 res->do_recall = be32_to_cpup(p);
5030
5031 switch (delegation_type) {
5032 case NFS4_OPEN_DELEGATE_READ:
5033 res->delegation_type = FMODE_READ;
5034 break;
5035 case NFS4_OPEN_DELEGATE_WRITE:
5036 res->delegation_type = FMODE_WRITE|FMODE_READ;
5037 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5038 return -EIO;
5039 }
5040 return decode_ace(xdr, NULL);
5041 }
5042
5043 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5044 {
5045 __be32 *p;
5046 uint32_t why_no_delegation;
5047
5048 p = xdr_inline_decode(xdr, 4);
5049 if (unlikely(!p))
5050 return -EIO;
5051 why_no_delegation = be32_to_cpup(p);
5052 switch (why_no_delegation) {
5053 case WND4_CONTENTION:
5054 case WND4_RESOURCE:
5055 xdr_inline_decode(xdr, 4);
5056 /* Ignore for now */
5057 }
5058 return 0;
5059 }
5060
5061 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5062 {
5063 __be32 *p;
5064 uint32_t delegation_type;
5065
5066 p = xdr_inline_decode(xdr, 4);
5067 if (unlikely(!p))
5068 return -EIO;
5069 delegation_type = be32_to_cpup(p);
5070 res->delegation_type = 0;
5071 switch (delegation_type) {
5072 case NFS4_OPEN_DELEGATE_NONE:
5073 return 0;
5074 case NFS4_OPEN_DELEGATE_READ:
5075 case NFS4_OPEN_DELEGATE_WRITE:
5076 return decode_rw_delegation(xdr, delegation_type, res);
5077 case NFS4_OPEN_DELEGATE_NONE_EXT:
5078 return decode_no_delegation(xdr, res);
5079 }
5080 return -EIO;
5081 }
5082
5083 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5084 {
5085 __be32 *p;
5086 uint32_t savewords, bmlen, i;
5087 int status;
5088
5089 if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5090 return status;
5091 nfs_increment_open_seqid(status, res->seqid);
5092 if (status)
5093 return status;
5094 status = decode_open_stateid(xdr, &res->stateid);
5095 if (unlikely(status))
5096 return status;
5097
5098 decode_change_info(xdr, &res->cinfo);
5099
5100 p = xdr_inline_decode(xdr, 8);
5101 if (unlikely(!p))
5102 return -EIO;
5103 res->rflags = be32_to_cpup(p++);
5104 bmlen = be32_to_cpup(p);
5105 if (bmlen > 10)
5106 goto xdr_error;
5107
5108 p = xdr_inline_decode(xdr, bmlen << 2);
5109 if (unlikely(!p))
5110 return -EIO;
5111 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5112 for (i = 0; i < savewords; ++i)
5113 res->attrset[i] = be32_to_cpup(p++);
5114 for (; i < NFS4_BITMAP_SIZE; i++)
5115 res->attrset[i] = 0;
5116
5117 return decode_delegation(xdr, res);
5118 xdr_error:
5119 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5120 return -EIO;
5121 }
5122
5123 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5124 {
5125 int status;
5126
5127 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5128 if (status != -EIO)
5129 nfs_increment_open_seqid(status, res->seqid);
5130 if (!status)
5131 status = decode_open_stateid(xdr, &res->stateid);
5132 return status;
5133 }
5134
5135 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5136 {
5137 int status;
5138
5139 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5140 if (status != -EIO)
5141 nfs_increment_open_seqid(status, res->seqid);
5142 if (!status)
5143 status = decode_open_stateid(xdr, &res->stateid);
5144 return status;
5145 }
5146
5147 static int decode_putfh(struct xdr_stream *xdr)
5148 {
5149 return decode_op_hdr(xdr, OP_PUTFH);
5150 }
5151
5152 static int decode_putrootfh(struct xdr_stream *xdr)
5153 {
5154 return decode_op_hdr(xdr, OP_PUTROOTFH);
5155 }
5156
5157 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5158 struct nfs_pgio_res *res)
5159 {
5160 __be32 *p;
5161 uint32_t count, eof, recvd;
5162 int status;
5163
5164 status = decode_op_hdr(xdr, OP_READ);
5165 if (status)
5166 return status;
5167 p = xdr_inline_decode(xdr, 8);
5168 if (unlikely(!p))
5169 return -EIO;
5170 eof = be32_to_cpup(p++);
5171 count = be32_to_cpup(p);
5172 recvd = xdr_read_pages(xdr, count);
5173 if (count > recvd) {
5174 dprintk("NFS: server cheating in read reply: "
5175 "count %u > recvd %u\n", count, recvd);
5176 count = recvd;
5177 eof = 0;
5178 }
5179 res->eof = eof;
5180 res->count = count;
5181 return 0;
5182 }
5183
5184 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5185 {
5186 int status;
5187 __be32 verf[2];
5188
5189 status = decode_op_hdr(xdr, OP_READDIR);
5190 if (!status)
5191 status = decode_verifier(xdr, readdir->verifier.data);
5192 if (unlikely(status))
5193 return status;
5194 memcpy(verf, readdir->verifier.data, sizeof(verf));
5195 dprintk("%s: verifier = %08x:%08x\n",
5196 __func__, verf[0], verf[1]);
5197 return xdr_read_pages(xdr, xdr->buf->page_len);
5198 }
5199
5200 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5201 {
5202 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5203 u32 len, recvd;
5204 __be32 *p;
5205 int status;
5206
5207 status = decode_op_hdr(xdr, OP_READLINK);
5208 if (status)
5209 return status;
5210
5211 /* Convert length of symlink */
5212 p = xdr_inline_decode(xdr, 4);
5213 if (unlikely(!p))
5214 return -EIO;
5215 len = be32_to_cpup(p);
5216 if (len >= rcvbuf->page_len || len <= 0) {
5217 dprintk("nfs: server returned giant symlink!\n");
5218 return -ENAMETOOLONG;
5219 }
5220 recvd = xdr_read_pages(xdr, len);
5221 if (recvd < len) {
5222 dprintk("NFS: server cheating in readlink reply: "
5223 "count %u > recvd %u\n", len, recvd);
5224 return -EIO;
5225 }
5226 /*
5227 * The XDR encode routine has set things up so that
5228 * the link text will be copied directly into the
5229 * buffer. We just have to do overflow-checking,
5230 * and and null-terminate the text (the VFS expects
5231 * null-termination).
5232 */
5233 xdr_terminate_string(rcvbuf, len);
5234 return 0;
5235 }
5236
5237 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5238 {
5239 int status;
5240
5241 status = decode_op_hdr(xdr, OP_REMOVE);
5242 if (status)
5243 goto out;
5244 status = decode_change_info(xdr, cinfo);
5245 out:
5246 return status;
5247 }
5248
5249 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5250 struct nfs4_change_info *new_cinfo)
5251 {
5252 int status;
5253
5254 status = decode_op_hdr(xdr, OP_RENAME);
5255 if (status)
5256 goto out;
5257 if ((status = decode_change_info(xdr, old_cinfo)))
5258 goto out;
5259 status = decode_change_info(xdr, new_cinfo);
5260 out:
5261 return status;
5262 }
5263
5264 static int decode_renew(struct xdr_stream *xdr)
5265 {
5266 return decode_op_hdr(xdr, OP_RENEW);
5267 }
5268
5269 static int
5270 decode_restorefh(struct xdr_stream *xdr)
5271 {
5272 return decode_op_hdr(xdr, OP_RESTOREFH);
5273 }
5274
5275 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5276 struct nfs_getaclres *res)
5277 {
5278 unsigned int savep;
5279 uint32_t attrlen,
5280 bitmap[3] = {0};
5281 int status;
5282 unsigned int pg_offset;
5283
5284 res->acl_len = 0;
5285 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5286 goto out;
5287
5288 xdr_enter_page(xdr, xdr->buf->page_len);
5289
5290 /* Calculate the offset of the page data */
5291 pg_offset = xdr->buf->head[0].iov_len;
5292
5293 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5294 goto out;
5295 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5296 goto out;
5297
5298 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5299 return -EIO;
5300 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5301
5302 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5303 * are stored with the acl data to handle the problem of
5304 * variable length bitmaps.*/
5305 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5306 res->acl_len = attrlen;
5307
5308 /* Check for receive buffer overflow */
5309 if (res->acl_len > (xdr->nwords << 2) ||
5310 res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5311 res->acl_flags |= NFS4_ACL_TRUNC;
5312 dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5313 attrlen, xdr->nwords << 2);
5314 }
5315 } else
5316 status = -EOPNOTSUPP;
5317
5318 out:
5319 return status;
5320 }
5321
5322 static int
5323 decode_savefh(struct xdr_stream *xdr)
5324 {
5325 return decode_op_hdr(xdr, OP_SAVEFH);
5326 }
5327
5328 static int decode_setattr(struct xdr_stream *xdr)
5329 {
5330 int status;
5331
5332 status = decode_op_hdr(xdr, OP_SETATTR);
5333 if (status)
5334 return status;
5335 if (decode_bitmap4(xdr, NULL, 0) >= 0)
5336 return 0;
5337 return -EIO;
5338 }
5339
5340 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5341 {
5342 __be32 *p;
5343 uint32_t opnum;
5344 int32_t nfserr;
5345
5346 p = xdr_inline_decode(xdr, 8);
5347 if (unlikely(!p))
5348 return -EIO;
5349 opnum = be32_to_cpup(p++);
5350 if (opnum != OP_SETCLIENTID) {
5351 dprintk("nfs: decode_setclientid: Server returned operation"
5352 " %d\n", opnum);
5353 return -EIO;
5354 }
5355 nfserr = be32_to_cpup(p);
5356 if (nfserr == NFS_OK) {
5357 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5358 if (unlikely(!p))
5359 return -EIO;
5360 p = xdr_decode_hyper(p, &res->clientid);
5361 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5362 } else if (nfserr == NFSERR_CLID_INUSE) {
5363 uint32_t len;
5364
5365 /* skip netid string */
5366 p = xdr_inline_decode(xdr, 4);
5367 if (unlikely(!p))
5368 return -EIO;
5369 len = be32_to_cpup(p);
5370 p = xdr_inline_decode(xdr, len);
5371 if (unlikely(!p))
5372 return -EIO;
5373
5374 /* skip uaddr string */
5375 p = xdr_inline_decode(xdr, 4);
5376 if (unlikely(!p))
5377 return -EIO;
5378 len = be32_to_cpup(p);
5379 p = xdr_inline_decode(xdr, len);
5380 if (unlikely(!p))
5381 return -EIO;
5382 return -NFSERR_CLID_INUSE;
5383 } else
5384 return nfs4_stat_to_errno(nfserr);
5385
5386 return 0;
5387 }
5388
5389 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5390 {
5391 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5392 }
5393
5394 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5395 {
5396 __be32 *p;
5397 int status;
5398
5399 status = decode_op_hdr(xdr, OP_WRITE);
5400 if (status)
5401 return status;
5402
5403 p = xdr_inline_decode(xdr, 8);
5404 if (unlikely(!p))
5405 return -EIO;
5406 res->count = be32_to_cpup(p++);
5407 res->verf->committed = be32_to_cpup(p++);
5408 return decode_write_verifier(xdr, &res->verf->verifier);
5409 }
5410
5411 static int decode_delegreturn(struct xdr_stream *xdr)
5412 {
5413 return decode_op_hdr(xdr, OP_DELEGRETURN);
5414 }
5415
5416 static int decode_secinfo_gss(struct xdr_stream *xdr,
5417 struct nfs4_secinfo4 *flavor)
5418 {
5419 u32 oid_len;
5420 __be32 *p;
5421
5422 p = xdr_inline_decode(xdr, 4);
5423 if (unlikely(!p))
5424 return -EIO;
5425 oid_len = be32_to_cpup(p);
5426 if (oid_len > GSS_OID_MAX_LEN)
5427 return -EINVAL;
5428
5429 p = xdr_inline_decode(xdr, oid_len);
5430 if (unlikely(!p))
5431 return -EIO;
5432 memcpy(flavor->flavor_info.oid.data, p, oid_len);
5433 flavor->flavor_info.oid.len = oid_len;
5434
5435 p = xdr_inline_decode(xdr, 8);
5436 if (unlikely(!p))
5437 return -EIO;
5438 flavor->flavor_info.qop = be32_to_cpup(p++);
5439 flavor->flavor_info.service = be32_to_cpup(p);
5440
5441 return 0;
5442 }
5443
5444 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5445 {
5446 struct nfs4_secinfo4 *sec_flavor;
5447 unsigned int i, num_flavors;
5448 int status;
5449 __be32 *p;
5450
5451 p = xdr_inline_decode(xdr, 4);
5452 if (unlikely(!p))
5453 return -EIO;
5454
5455 res->flavors->num_flavors = 0;
5456 num_flavors = be32_to_cpup(p);
5457
5458 for (i = 0; i < num_flavors; i++) {
5459 sec_flavor = &res->flavors->flavors[i];
5460 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5461 break;
5462
5463 p = xdr_inline_decode(xdr, 4);
5464 if (unlikely(!p))
5465 return -EIO;
5466 sec_flavor->flavor = be32_to_cpup(p);
5467
5468 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5469 status = decode_secinfo_gss(xdr, sec_flavor);
5470 if (status)
5471 goto out;
5472 }
5473 res->flavors->num_flavors++;
5474 }
5475
5476 status = 0;
5477 out:
5478 return status;
5479 }
5480
5481 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5482 {
5483 int status = decode_op_hdr(xdr, OP_SECINFO);
5484 if (status)
5485 return status;
5486 return decode_secinfo_common(xdr, res);
5487 }
5488
5489 #if defined(CONFIG_NFS_V4_1)
5490 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5491 {
5492 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5493 if (status)
5494 return status;
5495 return decode_secinfo_common(xdr, res);
5496 }
5497
5498 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5499 {
5500 __be32 *p;
5501 uint32_t bitmap_words;
5502 unsigned int i;
5503
5504 p = xdr_inline_decode(xdr, 4);
5505 if (!p)
5506 return -EIO;
5507 bitmap_words = be32_to_cpup(p++);
5508 if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5509 return -EIO;
5510 p = xdr_inline_decode(xdr, 4 * bitmap_words);
5511 for (i = 0; i < bitmap_words; i++)
5512 op_map->u.words[i] = be32_to_cpup(p++);
5513
5514 return 0;
5515 }
5516
5517 static int decode_exchange_id(struct xdr_stream *xdr,
5518 struct nfs41_exchange_id_res *res)
5519 {
5520 __be32 *p;
5521 uint32_t dummy;
5522 char *dummy_str;
5523 int status;
5524 uint32_t impl_id_count;
5525
5526 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5527 if (status)
5528 return status;
5529
5530 p = xdr_inline_decode(xdr, 8);
5531 if (unlikely(!p))
5532 return -EIO;
5533 xdr_decode_hyper(p, &res->clientid);
5534 p = xdr_inline_decode(xdr, 12);
5535 if (unlikely(!p))
5536 return -EIO;
5537 res->seqid = be32_to_cpup(p++);
5538 res->flags = be32_to_cpup(p++);
5539
5540 res->state_protect.how = be32_to_cpup(p);
5541 switch (res->state_protect.how) {
5542 case SP4_NONE:
5543 break;
5544 case SP4_MACH_CRED:
5545 status = decode_op_map(xdr, &res->state_protect.enforce);
5546 if (status)
5547 return status;
5548 status = decode_op_map(xdr, &res->state_protect.allow);
5549 if (status)
5550 return status;
5551 break;
5552 default:
5553 WARN_ON_ONCE(1);
5554 return -EIO;
5555 }
5556
5557 /* server_owner4.so_minor_id */
5558 p = xdr_inline_decode(xdr, 8);
5559 if (unlikely(!p))
5560 return -EIO;
5561 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5562
5563 /* server_owner4.so_major_id */
5564 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5565 if (unlikely(status))
5566 return status;
5567 memcpy(res->server_owner->major_id, dummy_str, dummy);
5568 res->server_owner->major_id_sz = dummy;
5569
5570 /* server_scope4 */
5571 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5572 if (unlikely(status))
5573 return status;
5574 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5575 res->server_scope->server_scope_sz = dummy;
5576
5577 /* Implementation Id */
5578 p = xdr_inline_decode(xdr, 4);
5579 if (unlikely(!p))
5580 return -EIO;
5581 impl_id_count = be32_to_cpup(p++);
5582
5583 if (impl_id_count) {
5584 /* nii_domain */
5585 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5586 if (unlikely(status))
5587 return status;
5588 memcpy(res->impl_id->domain, dummy_str, dummy);
5589
5590 /* nii_name */
5591 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5592 if (unlikely(status))
5593 return status;
5594 memcpy(res->impl_id->name, dummy_str, dummy);
5595
5596 /* nii_date */
5597 p = xdr_inline_decode(xdr, 12);
5598 if (unlikely(!p))
5599 return -EIO;
5600 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5601 res->impl_id->date.nseconds = be32_to_cpup(p);
5602
5603 /* if there's more than one entry, ignore the rest */
5604 }
5605 return 0;
5606 }
5607
5608 static int decode_chan_attrs(struct xdr_stream *xdr,
5609 struct nfs4_channel_attrs *attrs)
5610 {
5611 __be32 *p;
5612 u32 nr_attrs, val;
5613
5614 p = xdr_inline_decode(xdr, 28);
5615 if (unlikely(!p))
5616 return -EIO;
5617 val = be32_to_cpup(p++); /* headerpadsz */
5618 if (val)
5619 return -EINVAL; /* no support for header padding yet */
5620 attrs->max_rqst_sz = be32_to_cpup(p++);
5621 attrs->max_resp_sz = be32_to_cpup(p++);
5622 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5623 attrs->max_ops = be32_to_cpup(p++);
5624 attrs->max_reqs = be32_to_cpup(p++);
5625 nr_attrs = be32_to_cpup(p);
5626 if (unlikely(nr_attrs > 1)) {
5627 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5628 "count %u\n", __func__, nr_attrs);
5629 return -EINVAL;
5630 }
5631 if (nr_attrs == 1) {
5632 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5633 if (unlikely(!p))
5634 return -EIO;
5635 }
5636 return 0;
5637 }
5638
5639 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5640 {
5641 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5642 }
5643
5644 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5645 struct nfs41_bind_conn_to_session_res *res)
5646 {
5647 __be32 *p;
5648 int status;
5649
5650 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5651 if (!status)
5652 status = decode_sessionid(xdr, &res->sessionid);
5653 if (unlikely(status))
5654 return status;
5655
5656 /* dir flags, rdma mode bool */
5657 p = xdr_inline_decode(xdr, 8);
5658 if (unlikely(!p))
5659 return -EIO;
5660
5661 res->dir = be32_to_cpup(p++);
5662 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5663 return -EIO;
5664 if (be32_to_cpup(p) == 0)
5665 res->use_conn_in_rdma_mode = false;
5666 else
5667 res->use_conn_in_rdma_mode = true;
5668
5669 return 0;
5670 }
5671
5672 static int decode_create_session(struct xdr_stream *xdr,
5673 struct nfs41_create_session_res *res)
5674 {
5675 __be32 *p;
5676 int status;
5677
5678 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5679 if (!status)
5680 status = decode_sessionid(xdr, &res->sessionid);
5681 if (unlikely(status))
5682 return status;
5683
5684 /* seqid, flags */
5685 p = xdr_inline_decode(xdr, 8);
5686 if (unlikely(!p))
5687 return -EIO;
5688 res->seqid = be32_to_cpup(p++);
5689 res->flags = be32_to_cpup(p);
5690
5691 /* Channel attributes */
5692 status = decode_chan_attrs(xdr, &res->fc_attrs);
5693 if (!status)
5694 status = decode_chan_attrs(xdr, &res->bc_attrs);
5695 return status;
5696 }
5697
5698 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5699 {
5700 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5701 }
5702
5703 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5704 {
5705 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5706 }
5707
5708 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5709 {
5710 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5711 }
5712 #endif /* CONFIG_NFS_V4_1 */
5713
5714 static int decode_sequence(struct xdr_stream *xdr,
5715 struct nfs4_sequence_res *res,
5716 struct rpc_rqst *rqstp)
5717 {
5718 #if defined(CONFIG_NFS_V4_1)
5719 struct nfs4_session *session;
5720 struct nfs4_sessionid id;
5721 u32 dummy;
5722 int status;
5723 __be32 *p;
5724
5725 if (res->sr_slot == NULL)
5726 return 0;
5727 if (!res->sr_slot->table->session)
5728 return 0;
5729
5730 status = decode_op_hdr(xdr, OP_SEQUENCE);
5731 if (!status)
5732 status = decode_sessionid(xdr, &id);
5733 if (unlikely(status))
5734 goto out_err;
5735
5736 /*
5737 * If the server returns different values for sessionID, slotID or
5738 * sequence number, the server is looney tunes.
5739 */
5740 status = -EREMOTEIO;
5741 session = res->sr_slot->table->session;
5742
5743 if (memcmp(id.data, session->sess_id.data,
5744 NFS4_MAX_SESSIONID_LEN)) {
5745 dprintk("%s Invalid session id\n", __func__);
5746 goto out_err;
5747 }
5748
5749 p = xdr_inline_decode(xdr, 20);
5750 if (unlikely(!p))
5751 goto out_overflow;
5752
5753 /* seqid */
5754 dummy = be32_to_cpup(p++);
5755 if (dummy != res->sr_slot->seq_nr) {
5756 dprintk("%s Invalid sequence number\n", __func__);
5757 goto out_err;
5758 }
5759 /* slot id */
5760 dummy = be32_to_cpup(p++);
5761 if (dummy != res->sr_slot->slot_nr) {
5762 dprintk("%s Invalid slot id\n", __func__);
5763 goto out_err;
5764 }
5765 /* highest slot id */
5766 res->sr_highest_slotid = be32_to_cpup(p++);
5767 /* target highest slot id */
5768 res->sr_target_highest_slotid = be32_to_cpup(p++);
5769 /* result flags */
5770 res->sr_status_flags = be32_to_cpup(p);
5771 status = 0;
5772 out_err:
5773 res->sr_status = status;
5774 return status;
5775 out_overflow:
5776 status = -EIO;
5777 goto out_err;
5778 #else /* CONFIG_NFS_V4_1 */
5779 return 0;
5780 #endif /* CONFIG_NFS_V4_1 */
5781 }
5782
5783 #if defined(CONFIG_NFS_V4_1)
5784 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5785 {
5786 stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5787 return decode_stateid(xdr, stateid);
5788 }
5789
5790 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5791 struct nfs4_getdeviceinfo_res *res)
5792 {
5793 struct pnfs_device *pdev = res->pdev;
5794 __be32 *p;
5795 uint32_t len, type;
5796 int status;
5797
5798 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5799 if (status) {
5800 if (status == -ETOOSMALL) {
5801 p = xdr_inline_decode(xdr, 4);
5802 if (unlikely(!p))
5803 return -EIO;
5804 pdev->mincount = be32_to_cpup(p);
5805 dprintk("%s: Min count too small. mincnt = %u\n",
5806 __func__, pdev->mincount);
5807 }
5808 return status;
5809 }
5810
5811 p = xdr_inline_decode(xdr, 8);
5812 if (unlikely(!p))
5813 return -EIO;
5814 type = be32_to_cpup(p++);
5815 if (type != pdev->layout_type) {
5816 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5817 __func__, pdev->layout_type, type);
5818 return -EINVAL;
5819 }
5820 /*
5821 * Get the length of the opaque device_addr4. xdr_read_pages places
5822 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5823 * and places the remaining xdr data in xdr_buf->tail
5824 */
5825 pdev->mincount = be32_to_cpup(p);
5826 if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5827 return -EIO;
5828
5829 /* Parse notification bitmap, verifying that it is zero. */
5830 p = xdr_inline_decode(xdr, 4);
5831 if (unlikely(!p))
5832 return -EIO;
5833 len = be32_to_cpup(p);
5834 if (len) {
5835 uint32_t i;
5836
5837 p = xdr_inline_decode(xdr, 4 * len);
5838 if (unlikely(!p))
5839 return -EIO;
5840
5841 res->notification = be32_to_cpup(p++);
5842 for (i = 1; i < len; i++) {
5843 if (be32_to_cpup(p++)) {
5844 dprintk("%s: unsupported notification\n",
5845 __func__);
5846 return -EIO;
5847 }
5848 }
5849 }
5850 return 0;
5851 }
5852
5853 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5854 struct nfs4_layoutget_res *res)
5855 {
5856 __be32 *p;
5857 int status;
5858 u32 layout_count;
5859 u32 recvd;
5860
5861 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5862 if (status)
5863 goto out;
5864 p = xdr_inline_decode(xdr, 4);
5865 if (unlikely(!p))
5866 goto out_overflow;
5867 res->return_on_close = be32_to_cpup(p);
5868 decode_layout_stateid(xdr, &res->stateid);
5869 p = xdr_inline_decode(xdr, 4);
5870 if (unlikely(!p))
5871 goto out_overflow;
5872 layout_count = be32_to_cpup(p);
5873 if (!layout_count) {
5874 dprintk("%s: server responded with empty layout array\n",
5875 __func__);
5876 status = -EINVAL;
5877 goto out;
5878 }
5879
5880 p = xdr_inline_decode(xdr, 28);
5881 if (unlikely(!p))
5882 goto out_overflow;
5883 p = xdr_decode_hyper(p, &res->range.offset);
5884 p = xdr_decode_hyper(p, &res->range.length);
5885 res->range.iomode = be32_to_cpup(p++);
5886 res->type = be32_to_cpup(p++);
5887 res->layoutp->len = be32_to_cpup(p);
5888
5889 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5890 __func__,
5891 (unsigned long)res->range.offset,
5892 (unsigned long)res->range.length,
5893 res->range.iomode,
5894 res->type,
5895 res->layoutp->len);
5896
5897 recvd = xdr_read_pages(xdr, res->layoutp->len);
5898 if (res->layoutp->len > recvd) {
5899 dprintk("NFS: server cheating in layoutget reply: "
5900 "layout len %u > recvd %u\n",
5901 res->layoutp->len, recvd);
5902 status = -EINVAL;
5903 goto out;
5904 }
5905
5906 if (layout_count > 1) {
5907 /* We only handle a length one array at the moment. Any
5908 * further entries are just ignored. Note that this means
5909 * the client may see a response that is less than the
5910 * minimum it requested.
5911 */
5912 dprintk("%s: server responded with %d layouts, dropping tail\n",
5913 __func__, layout_count);
5914 }
5915
5916 out:
5917 res->status = status;
5918 return status;
5919 out_overflow:
5920 status = -EIO;
5921 goto out;
5922 }
5923
5924 static int decode_layoutreturn(struct xdr_stream *xdr,
5925 struct nfs4_layoutreturn_res *res)
5926 {
5927 __be32 *p;
5928 int status;
5929
5930 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5931 if (status)
5932 return status;
5933 p = xdr_inline_decode(xdr, 4);
5934 if (unlikely(!p))
5935 return -EIO;
5936 res->lrs_present = be32_to_cpup(p);
5937 if (res->lrs_present)
5938 status = decode_layout_stateid(xdr, &res->stateid);
5939 else
5940 nfs4_stateid_copy(&res->stateid, &invalid_stateid);
5941 return status;
5942 }
5943
5944 static int decode_layoutcommit(struct xdr_stream *xdr,
5945 struct rpc_rqst *req,
5946 struct nfs4_layoutcommit_res *res)
5947 {
5948 __be32 *p;
5949 __u32 sizechanged;
5950 int status;
5951
5952 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5953 res->status = status;
5954 if (status)
5955 return status;
5956
5957 p = xdr_inline_decode(xdr, 4);
5958 if (unlikely(!p))
5959 return -EIO;
5960 sizechanged = be32_to_cpup(p);
5961
5962 if (sizechanged) {
5963 /* throw away new size */
5964 p = xdr_inline_decode(xdr, 8);
5965 if (unlikely(!p))
5966 return -EIO;
5967 }
5968 return 0;
5969 }
5970
5971 static int decode_test_stateid(struct xdr_stream *xdr,
5972 struct nfs41_test_stateid_res *res)
5973 {
5974 __be32 *p;
5975 int status;
5976 int num_res;
5977
5978 status = decode_op_hdr(xdr, OP_TEST_STATEID);
5979 if (status)
5980 return status;
5981
5982 p = xdr_inline_decode(xdr, 4);
5983 if (unlikely(!p))
5984 return -EIO;
5985 num_res = be32_to_cpup(p++);
5986 if (num_res != 1)
5987 return -EIO;
5988
5989 p = xdr_inline_decode(xdr, 4);
5990 if (unlikely(!p))
5991 return -EIO;
5992 res->status = be32_to_cpup(p++);
5993
5994 return status;
5995 }
5996
5997 static int decode_free_stateid(struct xdr_stream *xdr,
5998 struct nfs41_free_stateid_res *res)
5999 {
6000 res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6001 return res->status;
6002 }
6003 #else
6004 static inline
6005 int decode_layoutreturn(struct xdr_stream *xdr,
6006 struct nfs4_layoutreturn_res *res)
6007 {
6008 return 0;
6009 }
6010
6011 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6012 struct nfs4_layoutget_res *res)
6013 {
6014 return 0;
6015 }
6016
6017 #endif /* CONFIG_NFS_V4_1 */
6018
6019 /*
6020 * END OF "GENERIC" DECODE ROUTINES.
6021 */
6022
6023 /*
6024 * Decode OPEN_DOWNGRADE response
6025 */
6026 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6027 struct xdr_stream *xdr,
6028 void *data)
6029 {
6030 struct nfs_closeres *res = data;
6031 struct compound_hdr hdr;
6032 int status;
6033
6034 status = decode_compound_hdr(xdr, &hdr);
6035 if (status)
6036 goto out;
6037 status = decode_sequence(xdr, &res->seq_res, rqstp);
6038 if (status)
6039 goto out;
6040 status = decode_putfh(xdr);
6041 if (status)
6042 goto out;
6043 if (res->lr_res) {
6044 status = decode_layoutreturn(xdr, res->lr_res);
6045 res->lr_ret = status;
6046 if (status)
6047 goto out;
6048 }
6049 status = decode_open_downgrade(xdr, res);
6050 out:
6051 return status;
6052 }
6053
6054 /*
6055 * Decode ACCESS response
6056 */
6057 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6058 void *data)
6059 {
6060 struct nfs4_accessres *res = data;
6061 struct compound_hdr hdr;
6062 int status;
6063
6064 status = decode_compound_hdr(xdr, &hdr);
6065 if (status)
6066 goto out;
6067 status = decode_sequence(xdr, &res->seq_res, rqstp);
6068 if (status)
6069 goto out;
6070 status = decode_putfh(xdr);
6071 if (status != 0)
6072 goto out;
6073 status = decode_access(xdr, &res->supported, &res->access);
6074 if (status != 0)
6075 goto out;
6076 if (res->fattr)
6077 decode_getfattr(xdr, res->fattr, res->server);
6078 out:
6079 return status;
6080 }
6081
6082 /*
6083 * Decode LOOKUP response
6084 */
6085 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6086 void *data)
6087 {
6088 struct nfs4_lookup_res *res = data;
6089 struct compound_hdr hdr;
6090 int status;
6091
6092 status = decode_compound_hdr(xdr, &hdr);
6093 if (status)
6094 goto out;
6095 status = decode_sequence(xdr, &res->seq_res, rqstp);
6096 if (status)
6097 goto out;
6098 status = decode_putfh(xdr);
6099 if (status)
6100 goto out;
6101 status = decode_lookup(xdr);
6102 if (status)
6103 goto out;
6104 status = decode_getfh(xdr, res->fh);
6105 if (status)
6106 goto out;
6107 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6108 out:
6109 return status;
6110 }
6111
6112 /*
6113 * Decode LOOKUPP response
6114 */
6115 static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6116 void *data)
6117 {
6118 struct nfs4_lookupp_res *res = data;
6119 struct compound_hdr hdr;
6120 int status;
6121
6122 status = decode_compound_hdr(xdr, &hdr);
6123 if (status)
6124 goto out;
6125 status = decode_sequence(xdr, &res->seq_res, rqstp);
6126 if (status)
6127 goto out;
6128 status = decode_putfh(xdr);
6129 if (status)
6130 goto out;
6131 status = decode_lookupp(xdr);
6132 if (status)
6133 goto out;
6134 status = decode_getfh(xdr, res->fh);
6135 if (status)
6136 goto out;
6137 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6138 out:
6139 return status;
6140 }
6141
6142 /*
6143 * Decode LOOKUP_ROOT response
6144 */
6145 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6146 struct xdr_stream *xdr,
6147 void *data)
6148 {
6149 struct nfs4_lookup_res *res = data;
6150 struct compound_hdr hdr;
6151 int status;
6152
6153 status = decode_compound_hdr(xdr, &hdr);
6154 if (status)
6155 goto out;
6156 status = decode_sequence(xdr, &res->seq_res, rqstp);
6157 if (status)
6158 goto out;
6159 status = decode_putrootfh(xdr);
6160 if (status)
6161 goto out;
6162 status = decode_getfh(xdr, res->fh);
6163 if (status == 0)
6164 status = decode_getfattr_label(xdr, res->fattr,
6165 res->label, res->server);
6166 out:
6167 return status;
6168 }
6169
6170 /*
6171 * Decode REMOVE response
6172 */
6173 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6174 void *data)
6175 {
6176 struct nfs_removeres *res = data;
6177 struct compound_hdr hdr;
6178 int status;
6179
6180 status = decode_compound_hdr(xdr, &hdr);
6181 if (status)
6182 goto out;
6183 status = decode_sequence(xdr, &res->seq_res, rqstp);
6184 if (status)
6185 goto out;
6186 status = decode_putfh(xdr);
6187 if (status)
6188 goto out;
6189 status = decode_remove(xdr, &res->cinfo);
6190 out:
6191 return status;
6192 }
6193
6194 /*
6195 * Decode RENAME response
6196 */
6197 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6198 void *data)
6199 {
6200 struct nfs_renameres *res = data;
6201 struct compound_hdr hdr;
6202 int status;
6203
6204 status = decode_compound_hdr(xdr, &hdr);
6205 if (status)
6206 goto out;
6207 status = decode_sequence(xdr, &res->seq_res, rqstp);
6208 if (status)
6209 goto out;
6210 status = decode_putfh(xdr);
6211 if (status)
6212 goto out;
6213 status = decode_savefh(xdr);
6214 if (status)
6215 goto out;
6216 status = decode_putfh(xdr);
6217 if (status)
6218 goto out;
6219 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6220 out:
6221 return status;
6222 }
6223
6224 /*
6225 * Decode LINK response
6226 */
6227 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6228 void *data)
6229 {
6230 struct nfs4_link_res *res = data;
6231 struct compound_hdr hdr;
6232 int status;
6233
6234 status = decode_compound_hdr(xdr, &hdr);
6235 if (status)
6236 goto out;
6237 status = decode_sequence(xdr, &res->seq_res, rqstp);
6238 if (status)
6239 goto out;
6240 status = decode_putfh(xdr);
6241 if (status)
6242 goto out;
6243 status = decode_savefh(xdr);
6244 if (status)
6245 goto out;
6246 status = decode_putfh(xdr);
6247 if (status)
6248 goto out;
6249 status = decode_link(xdr, &res->cinfo);
6250 if (status)
6251 goto out;
6252 /*
6253 * Note order: OP_LINK leaves the directory as the current
6254 * filehandle.
6255 */
6256 status = decode_restorefh(xdr);
6257 if (status)
6258 goto out;
6259 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6260 out:
6261 return status;
6262 }
6263
6264 /*
6265 * Decode CREATE response
6266 */
6267 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6268 void *data)
6269 {
6270 struct nfs4_create_res *res = data;
6271 struct compound_hdr hdr;
6272 int status;
6273
6274 status = decode_compound_hdr(xdr, &hdr);
6275 if (status)
6276 goto out;
6277 status = decode_sequence(xdr, &res->seq_res, rqstp);
6278 if (status)
6279 goto out;
6280 status = decode_putfh(xdr);
6281 if (status)
6282 goto out;
6283 status = decode_create(xdr, &res->dir_cinfo);
6284 if (status)
6285 goto out;
6286 status = decode_getfh(xdr, res->fh);
6287 if (status)
6288 goto out;
6289 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6290 out:
6291 return status;
6292 }
6293
6294 /*
6295 * Decode SYMLINK response
6296 */
6297 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6298 void *res)
6299 {
6300 return nfs4_xdr_dec_create(rqstp, xdr, res);
6301 }
6302
6303 /*
6304 * Decode GETATTR response
6305 */
6306 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6307 void *data)
6308 {
6309 struct nfs4_getattr_res *res = data;
6310 struct compound_hdr hdr;
6311 int status;
6312
6313 status = decode_compound_hdr(xdr, &hdr);
6314 if (status)
6315 goto out;
6316 status = decode_sequence(xdr, &res->seq_res, rqstp);
6317 if (status)
6318 goto out;
6319 status = decode_putfh(xdr);
6320 if (status)
6321 goto out;
6322 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6323 out:
6324 return status;
6325 }
6326
6327 /*
6328 * Encode an SETACL request
6329 */
6330 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6331 const void *data)
6332 {
6333 const struct nfs_setaclargs *args = data;
6334 struct compound_hdr hdr = {
6335 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6336 };
6337
6338 encode_compound_hdr(xdr, req, &hdr);
6339 encode_sequence(xdr, &args->seq_args, &hdr);
6340 encode_putfh(xdr, args->fh, &hdr);
6341 encode_setacl(xdr, args, &hdr);
6342 encode_nops(&hdr);
6343 }
6344
6345 /*
6346 * Decode SETACL response
6347 */
6348 static int
6349 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6350 void *data)
6351 {
6352 struct nfs_setaclres *res = data;
6353 struct compound_hdr hdr;
6354 int status;
6355
6356 status = decode_compound_hdr(xdr, &hdr);
6357 if (status)
6358 goto out;
6359 status = decode_sequence(xdr, &res->seq_res, rqstp);
6360 if (status)
6361 goto out;
6362 status = decode_putfh(xdr);
6363 if (status)
6364 goto out;
6365 status = decode_setattr(xdr);
6366 out:
6367 return status;
6368 }
6369
6370 /*
6371 * Decode GETACL response
6372 */
6373 static int
6374 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6375 void *data)
6376 {
6377 struct nfs_getaclres *res = data;
6378 struct compound_hdr hdr;
6379 int status;
6380
6381 if (res->acl_scratch != NULL) {
6382 void *p = page_address(res->acl_scratch);
6383 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
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_getacl(xdr, rqstp, res);
6395
6396 out:
6397 return status;
6398 }
6399
6400 /*
6401 * Decode CLOSE response
6402 */
6403 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6404 void *data)
6405 {
6406 struct nfs_closeres *res = data;
6407 struct compound_hdr hdr;
6408 int status;
6409
6410 status = decode_compound_hdr(xdr, &hdr);
6411 if (status)
6412 goto out;
6413 status = decode_sequence(xdr, &res->seq_res, rqstp);
6414 if (status)
6415 goto out;
6416 status = decode_putfh(xdr);
6417 if (status)
6418 goto out;
6419 if (res->lr_res) {
6420 status = decode_layoutreturn(xdr, res->lr_res);
6421 res->lr_ret = status;
6422 if (status)
6423 goto out;
6424 }
6425 if (res->fattr != NULL) {
6426 status = decode_getfattr(xdr, res->fattr, res->server);
6427 if (status != 0)
6428 goto out;
6429 }
6430 status = decode_close(xdr, res);
6431 out:
6432 return status;
6433 }
6434
6435 /*
6436 * Decode OPEN response
6437 */
6438 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6439 void *data)
6440 {
6441 struct nfs_openres *res = data;
6442 struct compound_hdr hdr;
6443 int status;
6444
6445 status = decode_compound_hdr(xdr, &hdr);
6446 if (status)
6447 goto out;
6448 status = decode_sequence(xdr, &res->seq_res, rqstp);
6449 if (status)
6450 goto out;
6451 status = decode_putfh(xdr);
6452 if (status)
6453 goto out;
6454 status = decode_open(xdr, res);
6455 if (status)
6456 goto out;
6457 status = decode_getfh(xdr, &res->fh);
6458 if (status)
6459 goto out;
6460 if (res->access_request)
6461 decode_access(xdr, &res->access_supported, &res->access_result);
6462 decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6463 if (res->lg_res)
6464 decode_layoutget(xdr, rqstp, res->lg_res);
6465 out:
6466 return status;
6467 }
6468
6469 /*
6470 * Decode OPEN_CONFIRM response
6471 */
6472 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6473 struct xdr_stream *xdr,
6474 void *data)
6475 {
6476 struct nfs_open_confirmres *res = data;
6477 struct compound_hdr hdr;
6478 int status;
6479
6480 status = decode_compound_hdr(xdr, &hdr);
6481 if (status)
6482 goto out;
6483 status = decode_putfh(xdr);
6484 if (status)
6485 goto out;
6486 status = decode_open_confirm(xdr, res);
6487 out:
6488 return status;
6489 }
6490
6491 /*
6492 * Decode OPEN response
6493 */
6494 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6495 struct xdr_stream *xdr,
6496 void *data)
6497 {
6498 struct nfs_openres *res = data;
6499 struct compound_hdr hdr;
6500 int status;
6501
6502 status = decode_compound_hdr(xdr, &hdr);
6503 if (status)
6504 goto out;
6505 status = decode_sequence(xdr, &res->seq_res, rqstp);
6506 if (status)
6507 goto out;
6508 status = decode_putfh(xdr);
6509 if (status)
6510 goto out;
6511 status = decode_open(xdr, res);
6512 if (status)
6513 goto out;
6514 if (res->access_request)
6515 decode_access(xdr, &res->access_supported, &res->access_result);
6516 decode_getfattr(xdr, res->f_attr, res->server);
6517 if (res->lg_res)
6518 decode_layoutget(xdr, rqstp, res->lg_res);
6519 out:
6520 return status;
6521 }
6522
6523 /*
6524 * Decode SETATTR response
6525 */
6526 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6527 struct xdr_stream *xdr,
6528 void *data)
6529 {
6530 struct nfs_setattrres *res = data;
6531 struct compound_hdr hdr;
6532 int status;
6533
6534 status = decode_compound_hdr(xdr, &hdr);
6535 if (status)
6536 goto out;
6537 status = decode_sequence(xdr, &res->seq_res, rqstp);
6538 if (status)
6539 goto out;
6540 status = decode_putfh(xdr);
6541 if (status)
6542 goto out;
6543 status = decode_setattr(xdr);
6544 if (status)
6545 goto out;
6546 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6547 out:
6548 return status;
6549 }
6550
6551 /*
6552 * Decode LOCK response
6553 */
6554 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6555 void *data)
6556 {
6557 struct nfs_lock_res *res = data;
6558 struct compound_hdr hdr;
6559 int status;
6560
6561 status = decode_compound_hdr(xdr, &hdr);
6562 if (status)
6563 goto out;
6564 status = decode_sequence(xdr, &res->seq_res, rqstp);
6565 if (status)
6566 goto out;
6567 status = decode_putfh(xdr);
6568 if (status)
6569 goto out;
6570 status = decode_lock(xdr, res);
6571 out:
6572 return status;
6573 }
6574
6575 /*
6576 * Decode LOCKT response
6577 */
6578 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6579 void *data)
6580 {
6581 struct nfs_lockt_res *res = data;
6582 struct compound_hdr hdr;
6583 int status;
6584
6585 status = decode_compound_hdr(xdr, &hdr);
6586 if (status)
6587 goto out;
6588 status = decode_sequence(xdr, &res->seq_res, rqstp);
6589 if (status)
6590 goto out;
6591 status = decode_putfh(xdr);
6592 if (status)
6593 goto out;
6594 status = decode_lockt(xdr, res);
6595 out:
6596 return status;
6597 }
6598
6599 /*
6600 * Decode LOCKU response
6601 */
6602 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6603 void *data)
6604 {
6605 struct nfs_locku_res *res = data;
6606 struct compound_hdr hdr;
6607 int status;
6608
6609 status = decode_compound_hdr(xdr, &hdr);
6610 if (status)
6611 goto out;
6612 status = decode_sequence(xdr, &res->seq_res, rqstp);
6613 if (status)
6614 goto out;
6615 status = decode_putfh(xdr);
6616 if (status)
6617 goto out;
6618 status = decode_locku(xdr, res);
6619 out:
6620 return status;
6621 }
6622
6623 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6624 struct xdr_stream *xdr, void *dummy)
6625 {
6626 struct compound_hdr hdr;
6627 int status;
6628
6629 status = decode_compound_hdr(xdr, &hdr);
6630 if (!status)
6631 status = decode_release_lockowner(xdr);
6632 return status;
6633 }
6634
6635 /*
6636 * Decode READLINK response
6637 */
6638 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6639 struct xdr_stream *xdr,
6640 void *data)
6641 {
6642 struct nfs4_readlink_res *res = data;
6643 struct compound_hdr hdr;
6644 int status;
6645
6646 status = decode_compound_hdr(xdr, &hdr);
6647 if (status)
6648 goto out;
6649 status = decode_sequence(xdr, &res->seq_res, rqstp);
6650 if (status)
6651 goto out;
6652 status = decode_putfh(xdr);
6653 if (status)
6654 goto out;
6655 status = decode_readlink(xdr, rqstp);
6656 out:
6657 return status;
6658 }
6659
6660 /*
6661 * Decode READDIR response
6662 */
6663 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6664 void *data)
6665 {
6666 struct nfs4_readdir_res *res = data;
6667 struct compound_hdr hdr;
6668 int status;
6669
6670 status = decode_compound_hdr(xdr, &hdr);
6671 if (status)
6672 goto out;
6673 status = decode_sequence(xdr, &res->seq_res, rqstp);
6674 if (status)
6675 goto out;
6676 status = decode_putfh(xdr);
6677 if (status)
6678 goto out;
6679 status = decode_readdir(xdr, rqstp, res);
6680 out:
6681 return status;
6682 }
6683
6684 /*
6685 * Decode Read response
6686 */
6687 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6688 void *data)
6689 {
6690 struct nfs_pgio_res *res = data;
6691 struct compound_hdr hdr;
6692 int status;
6693
6694 status = decode_compound_hdr(xdr, &hdr);
6695 res->op_status = hdr.status;
6696 if (status)
6697 goto out;
6698 status = decode_sequence(xdr, &res->seq_res, rqstp);
6699 if (status)
6700 goto out;
6701 status = decode_putfh(xdr);
6702 if (status)
6703 goto out;
6704 status = decode_read(xdr, rqstp, res);
6705 if (!status)
6706 status = res->count;
6707 out:
6708 return status;
6709 }
6710
6711 /*
6712 * Decode WRITE response
6713 */
6714 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6715 void *data)
6716 {
6717 struct nfs_pgio_res *res = data;
6718 struct compound_hdr hdr;
6719 int status;
6720
6721 status = decode_compound_hdr(xdr, &hdr);
6722 res->op_status = hdr.status;
6723 if (status)
6724 goto out;
6725 status = decode_sequence(xdr, &res->seq_res, rqstp);
6726 if (status)
6727 goto out;
6728 status = decode_putfh(xdr);
6729 if (status)
6730 goto out;
6731 status = decode_write(xdr, res);
6732 if (status)
6733 goto out;
6734 if (res->fattr)
6735 decode_getfattr(xdr, res->fattr, res->server);
6736 if (!status)
6737 status = res->count;
6738 out:
6739 return status;
6740 }
6741
6742 /*
6743 * Decode COMMIT response
6744 */
6745 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6746 void *data)
6747 {
6748 struct nfs_commitres *res = data;
6749 struct compound_hdr hdr;
6750 int status;
6751
6752 status = decode_compound_hdr(xdr, &hdr);
6753 res->op_status = hdr.status;
6754 if (status)
6755 goto out;
6756 status = decode_sequence(xdr, &res->seq_res, rqstp);
6757 if (status)
6758 goto out;
6759 status = decode_putfh(xdr);
6760 if (status)
6761 goto out;
6762 status = decode_commit(xdr, res);
6763 out:
6764 return status;
6765 }
6766
6767 /*
6768 * Decode FSINFO response
6769 */
6770 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6771 void *data)
6772 {
6773 struct nfs4_fsinfo_res *res = data;
6774 struct compound_hdr hdr;
6775 int status;
6776
6777 status = decode_compound_hdr(xdr, &hdr);
6778 if (!status)
6779 status = decode_sequence(xdr, &res->seq_res, req);
6780 if (!status)
6781 status = decode_putfh(xdr);
6782 if (!status)
6783 status = decode_fsinfo(xdr, res->fsinfo);
6784 return status;
6785 }
6786
6787 /*
6788 * Decode PATHCONF response
6789 */
6790 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6791 void *data)
6792 {
6793 struct nfs4_pathconf_res *res = data;
6794 struct compound_hdr hdr;
6795 int status;
6796
6797 status = decode_compound_hdr(xdr, &hdr);
6798 if (!status)
6799 status = decode_sequence(xdr, &res->seq_res, req);
6800 if (!status)
6801 status = decode_putfh(xdr);
6802 if (!status)
6803 status = decode_pathconf(xdr, res->pathconf);
6804 return status;
6805 }
6806
6807 /*
6808 * Decode STATFS response
6809 */
6810 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6811 void *data)
6812 {
6813 struct nfs4_statfs_res *res = data;
6814 struct compound_hdr hdr;
6815 int status;
6816
6817 status = decode_compound_hdr(xdr, &hdr);
6818 if (!status)
6819 status = decode_sequence(xdr, &res->seq_res, req);
6820 if (!status)
6821 status = decode_putfh(xdr);
6822 if (!status)
6823 status = decode_statfs(xdr, res->fsstat);
6824 return status;
6825 }
6826
6827 /*
6828 * Decode GETATTR_BITMAP response
6829 */
6830 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6831 struct xdr_stream *xdr,
6832 void *data)
6833 {
6834 struct nfs4_server_caps_res *res = data;
6835 struct compound_hdr hdr;
6836 int status;
6837
6838 status = decode_compound_hdr(xdr, &hdr);
6839 if (status)
6840 goto out;
6841 status = decode_sequence(xdr, &res->seq_res, req);
6842 if (status)
6843 goto out;
6844 status = decode_putfh(xdr);
6845 if (status)
6846 goto out;
6847 status = decode_server_caps(xdr, res);
6848 out:
6849 return status;
6850 }
6851
6852 /*
6853 * Decode RENEW response
6854 */
6855 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6856 void *__unused)
6857 {
6858 struct compound_hdr hdr;
6859 int status;
6860
6861 status = decode_compound_hdr(xdr, &hdr);
6862 if (!status)
6863 status = decode_renew(xdr);
6864 return status;
6865 }
6866
6867 /*
6868 * Decode SETCLIENTID response
6869 */
6870 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6871 struct xdr_stream *xdr,
6872 void *data)
6873 {
6874 struct nfs4_setclientid_res *res = data;
6875 struct compound_hdr hdr;
6876 int status;
6877
6878 status = decode_compound_hdr(xdr, &hdr);
6879 if (!status)
6880 status = decode_setclientid(xdr, res);
6881 return status;
6882 }
6883
6884 /*
6885 * Decode SETCLIENTID_CONFIRM response
6886 */
6887 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6888 struct xdr_stream *xdr,
6889 void *data)
6890 {
6891 struct compound_hdr hdr;
6892 int status;
6893
6894 status = decode_compound_hdr(xdr, &hdr);
6895 if (!status)
6896 status = decode_setclientid_confirm(xdr);
6897 return status;
6898 }
6899
6900 /*
6901 * Decode DELEGRETURN response
6902 */
6903 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6904 struct xdr_stream *xdr,
6905 void *data)
6906 {
6907 struct nfs4_delegreturnres *res = data;
6908 struct compound_hdr hdr;
6909 int status;
6910
6911 status = decode_compound_hdr(xdr, &hdr);
6912 if (status)
6913 goto out;
6914 status = decode_sequence(xdr, &res->seq_res, rqstp);
6915 if (status)
6916 goto out;
6917 status = decode_putfh(xdr);
6918 if (status != 0)
6919 goto out;
6920 if (res->lr_res) {
6921 status = decode_layoutreturn(xdr, res->lr_res);
6922 res->lr_ret = status;
6923 if (status)
6924 goto out;
6925 }
6926 if (res->fattr) {
6927 status = decode_getfattr(xdr, res->fattr, res->server);
6928 if (status != 0)
6929 goto out;
6930 }
6931 status = decode_delegreturn(xdr);
6932 out:
6933 return status;
6934 }
6935
6936 /*
6937 * Decode FS_LOCATIONS response
6938 */
6939 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6940 struct xdr_stream *xdr,
6941 void *data)
6942 {
6943 struct nfs4_fs_locations_res *res = data;
6944 struct compound_hdr hdr;
6945 int status;
6946
6947 status = decode_compound_hdr(xdr, &hdr);
6948 if (status)
6949 goto out;
6950 status = decode_sequence(xdr, &res->seq_res, req);
6951 if (status)
6952 goto out;
6953 status = decode_putfh(xdr);
6954 if (status)
6955 goto out;
6956 if (res->migration) {
6957 xdr_enter_page(xdr, PAGE_SIZE);
6958 status = decode_getfattr_generic(xdr,
6959 &res->fs_locations->fattr,
6960 NULL, res->fs_locations,
6961 NULL, res->fs_locations->server);
6962 if (status)
6963 goto out;
6964 if (res->renew)
6965 status = decode_renew(xdr);
6966 } else {
6967 status = decode_lookup(xdr);
6968 if (status)
6969 goto out;
6970 xdr_enter_page(xdr, PAGE_SIZE);
6971 status = decode_getfattr_generic(xdr,
6972 &res->fs_locations->fattr,
6973 NULL, res->fs_locations,
6974 NULL, res->fs_locations->server);
6975 }
6976 out:
6977 return status;
6978 }
6979
6980 /*
6981 * Decode SECINFO response
6982 */
6983 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6984 struct xdr_stream *xdr,
6985 void *data)
6986 {
6987 struct nfs4_secinfo_res *res = data;
6988 struct compound_hdr hdr;
6989 int status;
6990
6991 status = decode_compound_hdr(xdr, &hdr);
6992 if (status)
6993 goto out;
6994 status = decode_sequence(xdr, &res->seq_res, rqstp);
6995 if (status)
6996 goto out;
6997 status = decode_putfh(xdr);
6998 if (status)
6999 goto out;
7000 status = decode_secinfo(xdr, res);
7001 out:
7002 return status;
7003 }
7004
7005 /*
7006 * Decode FSID_PRESENT response
7007 */
7008 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7009 struct xdr_stream *xdr,
7010 void *data)
7011 {
7012 struct nfs4_fsid_present_res *res = data;
7013 struct compound_hdr hdr;
7014 int status;
7015
7016 status = decode_compound_hdr(xdr, &hdr);
7017 if (status)
7018 goto out;
7019 status = decode_sequence(xdr, &res->seq_res, rqstp);
7020 if (status)
7021 goto out;
7022 status = decode_putfh(xdr);
7023 if (status)
7024 goto out;
7025 status = decode_getfh(xdr, res->fh);
7026 if (status)
7027 goto out;
7028 if (res->renew)
7029 status = decode_renew(xdr);
7030 out:
7031 return status;
7032 }
7033
7034 #if defined(CONFIG_NFS_V4_1)
7035 /*
7036 * Decode BIND_CONN_TO_SESSION response
7037 */
7038 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7039 struct xdr_stream *xdr,
7040 void *res)
7041 {
7042 struct compound_hdr hdr;
7043 int status;
7044
7045 status = decode_compound_hdr(xdr, &hdr);
7046 if (!status)
7047 status = decode_bind_conn_to_session(xdr, res);
7048 return status;
7049 }
7050
7051 /*
7052 * Decode EXCHANGE_ID response
7053 */
7054 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7055 struct xdr_stream *xdr,
7056 void *res)
7057 {
7058 struct compound_hdr hdr;
7059 int status;
7060
7061 status = decode_compound_hdr(xdr, &hdr);
7062 if (!status)
7063 status = decode_exchange_id(xdr, res);
7064 return status;
7065 }
7066
7067 /*
7068 * Decode CREATE_SESSION response
7069 */
7070 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7071 struct xdr_stream *xdr,
7072 void *res)
7073 {
7074 struct compound_hdr hdr;
7075 int status;
7076
7077 status = decode_compound_hdr(xdr, &hdr);
7078 if (!status)
7079 status = decode_create_session(xdr, res);
7080 return status;
7081 }
7082
7083 /*
7084 * Decode DESTROY_SESSION response
7085 */
7086 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7087 struct xdr_stream *xdr,
7088 void *res)
7089 {
7090 struct compound_hdr hdr;
7091 int status;
7092
7093 status = decode_compound_hdr(xdr, &hdr);
7094 if (!status)
7095 status = decode_destroy_session(xdr, res);
7096 return status;
7097 }
7098
7099 /*
7100 * Decode DESTROY_CLIENTID response
7101 */
7102 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7103 struct xdr_stream *xdr,
7104 void *res)
7105 {
7106 struct compound_hdr hdr;
7107 int status;
7108
7109 status = decode_compound_hdr(xdr, &hdr);
7110 if (!status)
7111 status = decode_destroy_clientid(xdr, res);
7112 return status;
7113 }
7114
7115 /*
7116 * Decode SEQUENCE response
7117 */
7118 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7119 struct xdr_stream *xdr,
7120 void *res)
7121 {
7122 struct compound_hdr hdr;
7123 int status;
7124
7125 status = decode_compound_hdr(xdr, &hdr);
7126 if (!status)
7127 status = decode_sequence(xdr, res, rqstp);
7128 return status;
7129 }
7130
7131 #endif
7132
7133 /*
7134 * Decode GET_LEASE_TIME response
7135 */
7136 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7137 struct xdr_stream *xdr,
7138 void *data)
7139 {
7140 struct nfs4_get_lease_time_res *res = data;
7141 struct compound_hdr hdr;
7142 int status;
7143
7144 status = decode_compound_hdr(xdr, &hdr);
7145 if (!status)
7146 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7147 if (!status)
7148 status = decode_putrootfh(xdr);
7149 if (!status)
7150 status = decode_fsinfo(xdr, res->lr_fsinfo);
7151 return status;
7152 }
7153
7154 #ifdef CONFIG_NFS_V4_1
7155
7156 /*
7157 * Decode RECLAIM_COMPLETE response
7158 */
7159 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7160 struct xdr_stream *xdr,
7161 void *data)
7162 {
7163 struct nfs41_reclaim_complete_res *res = data;
7164 struct compound_hdr hdr;
7165 int status;
7166
7167 status = decode_compound_hdr(xdr, &hdr);
7168 if (!status)
7169 status = decode_sequence(xdr, &res->seq_res, rqstp);
7170 if (!status)
7171 status = decode_reclaim_complete(xdr, NULL);
7172 return status;
7173 }
7174
7175 /*
7176 * Decode GETDEVINFO response
7177 */
7178 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7179 struct xdr_stream *xdr,
7180 void *data)
7181 {
7182 struct nfs4_getdeviceinfo_res *res = data;
7183 struct compound_hdr hdr;
7184 int status;
7185
7186 status = decode_compound_hdr(xdr, &hdr);
7187 if (status != 0)
7188 goto out;
7189 status = decode_sequence(xdr, &res->seq_res, rqstp);
7190 if (status != 0)
7191 goto out;
7192 status = decode_getdeviceinfo(xdr, res);
7193 out:
7194 return status;
7195 }
7196
7197 /*
7198 * Decode LAYOUTGET response
7199 */
7200 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7201 struct xdr_stream *xdr,
7202 void *data)
7203 {
7204 struct nfs4_layoutget_res *res = data;
7205 struct compound_hdr hdr;
7206 int status;
7207
7208 status = decode_compound_hdr(xdr, &hdr);
7209 if (status)
7210 goto out;
7211 status = decode_sequence(xdr, &res->seq_res, rqstp);
7212 if (status)
7213 goto out;
7214 status = decode_putfh(xdr);
7215 if (status)
7216 goto out;
7217 status = decode_layoutget(xdr, rqstp, res);
7218 out:
7219 return status;
7220 }
7221
7222 /*
7223 * Decode LAYOUTRETURN response
7224 */
7225 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7226 struct xdr_stream *xdr,
7227 void *data)
7228 {
7229 struct nfs4_layoutreturn_res *res = data;
7230 struct compound_hdr hdr;
7231 int status;
7232
7233 status = decode_compound_hdr(xdr, &hdr);
7234 if (status)
7235 goto out;
7236 status = decode_sequence(xdr, &res->seq_res, rqstp);
7237 if (status)
7238 goto out;
7239 status = decode_putfh(xdr);
7240 if (status)
7241 goto out;
7242 status = decode_layoutreturn(xdr, res);
7243 out:
7244 return status;
7245 }
7246
7247 /*
7248 * Decode LAYOUTCOMMIT response
7249 */
7250 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7251 struct xdr_stream *xdr,
7252 void *data)
7253 {
7254 struct nfs4_layoutcommit_res *res = data;
7255 struct compound_hdr hdr;
7256 int status;
7257
7258 status = decode_compound_hdr(xdr, &hdr);
7259 if (status)
7260 goto out;
7261 status = decode_sequence(xdr, &res->seq_res, rqstp);
7262 if (status)
7263 goto out;
7264 status = decode_putfh(xdr);
7265 if (status)
7266 goto out;
7267 status = decode_layoutcommit(xdr, rqstp, res);
7268 if (status)
7269 goto out;
7270 decode_getfattr(xdr, res->fattr, res->server);
7271 out:
7272 return status;
7273 }
7274
7275 /*
7276 * Decode SECINFO_NO_NAME response
7277 */
7278 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7279 struct xdr_stream *xdr,
7280 void *data)
7281 {
7282 struct nfs4_secinfo_res *res = data;
7283 struct compound_hdr hdr;
7284 int status;
7285
7286 status = decode_compound_hdr(xdr, &hdr);
7287 if (status)
7288 goto out;
7289 status = decode_sequence(xdr, &res->seq_res, rqstp);
7290 if (status)
7291 goto out;
7292 status = decode_putrootfh(xdr);
7293 if (status)
7294 goto out;
7295 status = decode_secinfo_no_name(xdr, res);
7296 out:
7297 return status;
7298 }
7299
7300 /*
7301 * Decode TEST_STATEID response
7302 */
7303 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7304 struct xdr_stream *xdr,
7305 void *data)
7306 {
7307 struct nfs41_test_stateid_res *res = data;
7308 struct compound_hdr hdr;
7309 int status;
7310
7311 status = decode_compound_hdr(xdr, &hdr);
7312 if (status)
7313 goto out;
7314 status = decode_sequence(xdr, &res->seq_res, rqstp);
7315 if (status)
7316 goto out;
7317 status = decode_test_stateid(xdr, res);
7318 out:
7319 return status;
7320 }
7321
7322 /*
7323 * Decode FREE_STATEID response
7324 */
7325 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7326 struct xdr_stream *xdr,
7327 void *data)
7328 {
7329 struct nfs41_free_stateid_res *res = data;
7330 struct compound_hdr hdr;
7331 int status;
7332
7333 status = decode_compound_hdr(xdr, &hdr);
7334 if (status)
7335 goto out;
7336 status = decode_sequence(xdr, &res->seq_res, rqstp);
7337 if (status)
7338 goto out;
7339 status = decode_free_stateid(xdr, res);
7340 out:
7341 return status;
7342 }
7343 #endif /* CONFIG_NFS_V4_1 */
7344
7345 /**
7346 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7347 * the local page cache.
7348 * @xdr: XDR stream where entry resides
7349 * @entry: buffer to fill in with entry data
7350 * @plus: boolean indicating whether this should be a readdirplus entry
7351 *
7352 * Returns zero if successful, otherwise a negative errno value is
7353 * returned.
7354 *
7355 * This function is not invoked during READDIR reply decoding, but
7356 * rather whenever an application invokes the getdents(2) system call
7357 * on a directory already in our cache.
7358 */
7359 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7360 bool plus)
7361 {
7362 unsigned int savep;
7363 uint32_t bitmap[3] = {0};
7364 uint32_t len;
7365 uint64_t new_cookie;
7366 __be32 *p = xdr_inline_decode(xdr, 4);
7367 if (unlikely(!p))
7368 return -EAGAIN;
7369 if (*p == xdr_zero) {
7370 p = xdr_inline_decode(xdr, 4);
7371 if (unlikely(!p))
7372 return -EAGAIN;
7373 if (*p == xdr_zero)
7374 return -EAGAIN;
7375 entry->eof = 1;
7376 return -EBADCOOKIE;
7377 }
7378
7379 p = xdr_inline_decode(xdr, 12);
7380 if (unlikely(!p))
7381 return -EAGAIN;
7382 p = xdr_decode_hyper(p, &new_cookie);
7383 entry->len = be32_to_cpup(p);
7384
7385 p = xdr_inline_decode(xdr, entry->len);
7386 if (unlikely(!p))
7387 return -EAGAIN;
7388 entry->name = (const char *) p;
7389
7390 /*
7391 * In case the server doesn't return an inode number,
7392 * we fake one here. (We don't use inode number 0,
7393 * since glibc seems to choke on it...)
7394 */
7395 entry->ino = 1;
7396 entry->fattr->valid = 0;
7397
7398 if (decode_attr_bitmap(xdr, bitmap) < 0)
7399 return -EAGAIN;
7400
7401 if (decode_attr_length(xdr, &len, &savep) < 0)
7402 return -EAGAIN;
7403
7404 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7405 NULL, entry->label, entry->server) < 0)
7406 return -EAGAIN;
7407 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7408 entry->ino = entry->fattr->mounted_on_fileid;
7409 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7410 entry->ino = entry->fattr->fileid;
7411
7412 entry->d_type = DT_UNKNOWN;
7413 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7414 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7415
7416 entry->prev_cookie = entry->cookie;
7417 entry->cookie = new_cookie;
7418
7419 return 0;
7420 }
7421
7422 /*
7423 * We need to translate between nfs status return values and
7424 * the local errno values which may not be the same.
7425 */
7426 static struct {
7427 int stat;
7428 int errno;
7429 } nfs_errtbl[] = {
7430 { NFS4_OK, 0 },
7431 { NFS4ERR_PERM, -EPERM },
7432 { NFS4ERR_NOENT, -ENOENT },
7433 { NFS4ERR_IO, -errno_NFSERR_IO},
7434 { NFS4ERR_NXIO, -ENXIO },
7435 { NFS4ERR_ACCESS, -EACCES },
7436 { NFS4ERR_EXIST, -EEXIST },
7437 { NFS4ERR_XDEV, -EXDEV },
7438 { NFS4ERR_NOTDIR, -ENOTDIR },
7439 { NFS4ERR_ISDIR, -EISDIR },
7440 { NFS4ERR_INVAL, -EINVAL },
7441 { NFS4ERR_FBIG, -EFBIG },
7442 { NFS4ERR_NOSPC, -ENOSPC },
7443 { NFS4ERR_ROFS, -EROFS },
7444 { NFS4ERR_MLINK, -EMLINK },
7445 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7446 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7447 { NFS4ERR_DQUOT, -EDQUOT },
7448 { NFS4ERR_STALE, -ESTALE },
7449 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7450 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7451 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7452 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7453 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7454 { NFS4ERR_BADTYPE, -EBADTYPE },
7455 { NFS4ERR_LOCKED, -EAGAIN },
7456 { NFS4ERR_SYMLINK, -ELOOP },
7457 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7458 { NFS4ERR_DEADLOCK, -EDEADLK },
7459 { -1, -EIO }
7460 };
7461
7462 /*
7463 * Convert an NFS error code to a local one.
7464 * This one is used jointly by NFSv2 and NFSv3.
7465 */
7466 static int
7467 nfs4_stat_to_errno(int stat)
7468 {
7469 int i;
7470 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7471 if (nfs_errtbl[i].stat == stat)
7472 return nfs_errtbl[i].errno;
7473 }
7474 if (stat <= 10000 || stat > 10100) {
7475 /* The server is looney tunes. */
7476 return -EREMOTEIO;
7477 }
7478 /* If we cannot translate the error, the recovery routines should
7479 * handle it.
7480 * Note: remaining NFSv4 error codes have values > 10000, so should
7481 * not conflict with native Linux error codes.
7482 */
7483 return -stat;
7484 }
7485
7486 #ifdef CONFIG_NFS_V4_2
7487 #include "nfs42xdr.c"
7488 #endif /* CONFIG_NFS_V4_2 */
7489
7490 #define PROC(proc, argtype, restype) \
7491 [NFSPROC4_CLNT_##proc] = { \
7492 .p_proc = NFSPROC4_COMPOUND, \
7493 .p_encode = nfs4_xdr_##argtype, \
7494 .p_decode = nfs4_xdr_##restype, \
7495 .p_arglen = NFS4_##argtype##_sz, \
7496 .p_replen = NFS4_##restype##_sz, \
7497 .p_statidx = NFSPROC4_CLNT_##proc, \
7498 .p_name = #proc, \
7499 }
7500
7501 #define STUB(proc) \
7502 [NFSPROC4_CLNT_##proc] = { \
7503 .p_name = #proc, \
7504 }
7505
7506 #if defined(CONFIG_NFS_V4_1)
7507 #define PROC41(proc, argtype, restype) \
7508 PROC(proc, argtype, restype)
7509 #else
7510 #define PROC41(proc, argtype, restype) \
7511 STUB(proc)
7512 #endif
7513
7514 #if defined(CONFIG_NFS_V4_2)
7515 #define PROC42(proc, argtype, restype) \
7516 PROC(proc, argtype, restype)
7517 #else
7518 #define PROC42(proc, argtype, restype) \
7519 STUB(proc)
7520 #endif
7521
7522 const struct rpc_procinfo nfs4_procedures[] = {
7523 PROC(READ, enc_read, dec_read),
7524 PROC(WRITE, enc_write, dec_write),
7525 PROC(COMMIT, enc_commit, dec_commit),
7526 PROC(OPEN, enc_open, dec_open),
7527 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7528 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7529 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7530 PROC(CLOSE, enc_close, dec_close),
7531 PROC(SETATTR, enc_setattr, dec_setattr),
7532 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7533 PROC(RENEW, enc_renew, dec_renew),
7534 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7535 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7536 PROC(LOCK, enc_lock, dec_lock),
7537 PROC(LOCKT, enc_lockt, dec_lockt),
7538 PROC(LOCKU, enc_locku, dec_locku),
7539 PROC(ACCESS, enc_access, dec_access),
7540 PROC(GETATTR, enc_getattr, dec_getattr),
7541 PROC(LOOKUP, enc_lookup, dec_lookup),
7542 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7543 PROC(REMOVE, enc_remove, dec_remove),
7544 PROC(RENAME, enc_rename, dec_rename),
7545 PROC(LINK, enc_link, dec_link),
7546 PROC(SYMLINK, enc_symlink, dec_symlink),
7547 PROC(CREATE, enc_create, dec_create),
7548 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7549 PROC(STATFS, enc_statfs, dec_statfs),
7550 PROC(READLINK, enc_readlink, dec_readlink),
7551 PROC(READDIR, enc_readdir, dec_readdir),
7552 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7553 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7554 PROC(GETACL, enc_getacl, dec_getacl),
7555 PROC(SETACL, enc_setacl, dec_setacl),
7556 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7557 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7558 PROC(SECINFO, enc_secinfo, dec_secinfo),
7559 PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present),
7560 PROC41(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7561 PROC41(CREATE_SESSION, enc_create_session, dec_create_session),
7562 PROC41(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7563 PROC41(SEQUENCE, enc_sequence, dec_sequence),
7564 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7565 PROC41(RECLAIM_COMPLETE,enc_reclaim_complete, dec_reclaim_complete),
7566 PROC41(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7567 PROC41(LAYOUTGET, enc_layoutget, dec_layoutget),
7568 PROC41(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7569 PROC41(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7570 PROC41(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7571 PROC41(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7572 PROC41(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7573 STUB(GETDEVICELIST),
7574 PROC41(BIND_CONN_TO_SESSION,
7575 enc_bind_conn_to_session, dec_bind_conn_to_session),
7576 PROC41(DESTROY_CLIENTID,enc_destroy_clientid, dec_destroy_clientid),
7577 PROC42(SEEK, enc_seek, dec_seek),
7578 PROC42(ALLOCATE, enc_allocate, dec_allocate),
7579 PROC42(DEALLOCATE, enc_deallocate, dec_deallocate),
7580 PROC42(LAYOUTSTATS, enc_layoutstats, dec_layoutstats),
7581 PROC42(CLONE, enc_clone, dec_clone),
7582 PROC42(COPY, enc_copy, dec_copy),
7583 PROC42(OFFLOAD_CANCEL, enc_offload_cancel, dec_offload_cancel),
7584 PROC(LOOKUPP, enc_lookupp, dec_lookupp),
7585 PROC42(LAYOUTERROR, enc_layouterror, dec_layouterror),
7586 };
7587
7588 static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7589 const struct rpc_version nfs_version4 = {
7590 .number = 4,
7591 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7592 .procs = nfs4_procedures,
7593 .counts = nfs_version4_counts,
7594 };
7595
7596 /*
7597 * Local variables:
7598 * c-basic-offset: 8
7599 * End:
7600 */
connection oriented routing