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staging: erofs: fix warning Comparison to bool
[linux/fpc-iii.git] / fs / nfs / nfs4xdr.c
blob602446158bfb56e1fe62b74411d276431baef8c6
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 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
841 encode_sequence_maxsz + \
842 encode_putrootfh_maxsz + \
843 encode_fsinfo_maxsz)
844 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
845 decode_sequence_maxsz + \
846 decode_putrootfh_maxsz + \
847 decode_fsinfo_maxsz)
848 #define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
849 encode_sequence_maxsz + \
850 encode_reclaim_complete_maxsz)
851 #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
852 decode_sequence_maxsz + \
853 decode_reclaim_complete_maxsz)
854 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
855 encode_sequence_maxsz +\
856 encode_getdeviceinfo_maxsz)
857 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
858 decode_sequence_maxsz + \
859 decode_getdeviceinfo_maxsz)
860 #define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
861 encode_sequence_maxsz + \
862 encode_putfh_maxsz + \
863 encode_layoutget_maxsz)
864 #define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
865 decode_sequence_maxsz + \
866 decode_putfh_maxsz + \
867 decode_layoutget_maxsz)
868 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
869 encode_sequence_maxsz +\
870 encode_putfh_maxsz + \
871 encode_layoutcommit_maxsz + \
872 encode_getattr_maxsz)
873 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
874 decode_sequence_maxsz + \
875 decode_putfh_maxsz + \
876 decode_layoutcommit_maxsz + \
877 decode_getattr_maxsz)
878 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
879 encode_sequence_maxsz + \
880 encode_putfh_maxsz + \
881 encode_layoutreturn_maxsz)
882 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
883 decode_sequence_maxsz + \
884 decode_putfh_maxsz + \
885 decode_layoutreturn_maxsz)
886 #define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
887 encode_sequence_maxsz + \
888 encode_putrootfh_maxsz +\
889 encode_secinfo_no_name_maxsz)
890 #define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
891 decode_sequence_maxsz + \
892 decode_putrootfh_maxsz + \
893 decode_secinfo_no_name_maxsz)
894 #define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
895 encode_sequence_maxsz + \
896 encode_test_stateid_maxsz)
897 #define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
898 decode_sequence_maxsz + \
899 decode_test_stateid_maxsz)
900 #define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \
901 encode_sequence_maxsz + \
902 encode_free_stateid_maxsz)
903 #define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
904 decode_sequence_maxsz + \
905 decode_free_stateid_maxsz)
906
907 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
908 compound_encode_hdr_maxsz +
909 encode_sequence_maxsz +
910 encode_putfh_maxsz +
911 encode_getattr_maxsz) *
912 XDR_UNIT);
913
914 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
915 compound_decode_hdr_maxsz +
916 decode_sequence_maxsz +
917 decode_putfh_maxsz) *
918 XDR_UNIT);
919
920 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
921 compound_decode_hdr_maxsz +
922 decode_sequence_maxsz) *
923 XDR_UNIT);
924 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
925 #endif /* CONFIG_NFS_V4_1 */
926
927 static const umode_t nfs_type2fmt[] = {
928 [NF4BAD] = 0,
929 [NF4REG] = S_IFREG,
930 [NF4DIR] = S_IFDIR,
931 [NF4BLK] = S_IFBLK,
932 [NF4CHR] = S_IFCHR,
933 [NF4LNK] = S_IFLNK,
934 [NF4SOCK] = S_IFSOCK,
935 [NF4FIFO] = S_IFIFO,
936 [NF4ATTRDIR] = 0,
937 [NF4NAMEDATTR] = 0,
938 };
939
940 struct compound_hdr {
941 int32_t status;
942 uint32_t nops;
943 __be32 * nops_p;
944 uint32_t taglen;
945 char * tag;
946 uint32_t replen; /* expected reply words */
947 u32 minorversion;
948 };
949
950 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
951 {
952 __be32 *p = xdr_reserve_space(xdr, nbytes);
953 BUG_ON(!p);
954 return p;
955 }
956
957 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
958 {
959 WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
960 }
961
962 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
963 {
964 WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0);
965 }
966
967 static void encode_uint32(struct xdr_stream *xdr, u32 n)
968 {
969 WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
970 }
971
972 static void encode_uint64(struct xdr_stream *xdr, u64 n)
973 {
974 WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0);
975 }
976
977 static ssize_t xdr_encode_bitmap4(struct xdr_stream *xdr,
978 const __u32 *bitmap, size_t len)
979 {
980 ssize_t ret;
981
982 /* Trim empty words */
983 while (len > 0 && bitmap[len-1] == 0)
984 len--;
985 ret = xdr_stream_encode_uint32_array(xdr, bitmap, len);
986 if (WARN_ON_ONCE(ret < 0))
987 return ret;
988 return len;
989 }
990
991 static size_t mask_bitmap4(const __u32 *bitmap, const __u32 *mask,
992 __u32 *res, size_t len)
993 {
994 size_t i;
995 __u32 tmp;
996
997 while (len > 0 && (bitmap[len-1] == 0 || mask[len-1] == 0))
998 len--;
999 for (i = len; i-- > 0;) {
1000 tmp = bitmap[i] & mask[i];
1001 res[i] = tmp;
1002 }
1003 return len;
1004 }
1005
1006 static void encode_nfs4_seqid(struct xdr_stream *xdr,
1007 const struct nfs_seqid *seqid)
1008 {
1009 if (seqid != NULL)
1010 encode_uint32(xdr, seqid->sequence->counter);
1011 else
1012 encode_uint32(xdr, 0);
1013 }
1014
1015 static void encode_compound_hdr(struct xdr_stream *xdr,
1016 struct rpc_rqst *req,
1017 struct compound_hdr *hdr)
1018 {
1019 __be32 *p;
1020
1021 /* initialize running count of expected bytes in reply.
1022 * NOTE: the replied tag SHOULD be the same is the one sent,
1023 * but this is not required as a MUST for the server to do so. */
1024 hdr->replen = 3 + hdr->taglen;
1025
1026 WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
1027 encode_string(xdr, hdr->taglen, hdr->tag);
1028 p = reserve_space(xdr, 8);
1029 *p++ = cpu_to_be32(hdr->minorversion);
1030 hdr->nops_p = p;
1031 *p = cpu_to_be32(hdr->nops);
1032 }
1033
1034 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
1035 uint32_t replen,
1036 struct compound_hdr *hdr)
1037 {
1038 encode_uint32(xdr, op);
1039 hdr->nops++;
1040 hdr->replen += replen;
1041 }
1042
1043 static void encode_nops(struct compound_hdr *hdr)
1044 {
1045 WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
1046 *hdr->nops_p = htonl(hdr->nops);
1047 }
1048
1049 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1050 {
1051 encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1052 }
1053
1054 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1055 {
1056 encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1057 }
1058
1059 static __be32 *
1060 xdr_encode_nfstime4(__be32 *p, const struct timespec *t)
1061 {
1062 p = xdr_encode_hyper(p, (__s64)t->tv_sec);
1063 *p++ = cpu_to_be32(t->tv_nsec);
1064 return p;
1065 }
1066
1067 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1068 const struct nfs4_label *label,
1069 const umode_t *umask,
1070 const struct nfs_server *server,
1071 const uint32_t attrmask[])
1072 {
1073 struct timespec ts;
1074 char owner_name[IDMAP_NAMESZ];
1075 char owner_group[IDMAP_NAMESZ];
1076 int owner_namelen = 0;
1077 int owner_grouplen = 0;
1078 __be32 *p;
1079 uint32_t len = 0;
1080 uint32_t bmval[3] = { 0 };
1081
1082 /*
1083 * We reserve enough space to write the entire attribute buffer at once.
1084 */
1085 if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1086 bmval[0] |= FATTR4_WORD0_SIZE;
1087 len += 8;
1088 }
1089 if (iap->ia_valid & ATTR_MODE) {
1090 if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1091 bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1092 len += 8;
1093 } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1094 bmval[1] |= FATTR4_WORD1_MODE;
1095 len += 4;
1096 }
1097 }
1098 if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1099 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1100 if (owner_namelen < 0) {
1101 dprintk("nfs: couldn't resolve uid %d to string\n",
1102 from_kuid(&init_user_ns, iap->ia_uid));
1103 /* XXX */
1104 strcpy(owner_name, "nobody");
1105 owner_namelen = sizeof("nobody") - 1;
1106 /* goto out; */
1107 }
1108 bmval[1] |= FATTR4_WORD1_OWNER;
1109 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1110 }
1111 if ((iap->ia_valid & ATTR_GID) &&
1112 (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1113 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1114 if (owner_grouplen < 0) {
1115 dprintk("nfs: couldn't resolve gid %d to string\n",
1116 from_kgid(&init_user_ns, iap->ia_gid));
1117 strcpy(owner_group, "nobody");
1118 owner_grouplen = sizeof("nobody") - 1;
1119 /* goto out; */
1120 }
1121 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1122 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1123 }
1124 if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1125 if (iap->ia_valid & ATTR_ATIME_SET) {
1126 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1127 len += 4 + (nfstime4_maxsz << 2);
1128 } else if (iap->ia_valid & ATTR_ATIME) {
1129 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1130 len += 4;
1131 }
1132 }
1133 if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1134 if (iap->ia_valid & ATTR_MTIME_SET) {
1135 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1136 len += 4 + (nfstime4_maxsz << 2);
1137 } else if (iap->ia_valid & ATTR_MTIME) {
1138 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1139 len += 4;
1140 }
1141 }
1142
1143 if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1144 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1145 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1146 }
1147
1148 xdr_encode_bitmap4(xdr, bmval, ARRAY_SIZE(bmval));
1149 xdr_stream_encode_opaque_inline(xdr, (void **)&p, len);
1150
1151 if (bmval[0] & FATTR4_WORD0_SIZE)
1152 p = xdr_encode_hyper(p, iap->ia_size);
1153 if (bmval[1] & FATTR4_WORD1_MODE)
1154 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1155 if (bmval[1] & FATTR4_WORD1_OWNER)
1156 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1157 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1158 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1159 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1160 if (iap->ia_valid & ATTR_ATIME_SET) {
1161 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1162 ts = timespec64_to_timespec(iap->ia_atime);
1163 p = xdr_encode_nfstime4(p, &ts);
1164 } else
1165 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1166 }
1167 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1168 if (iap->ia_valid & ATTR_MTIME_SET) {
1169 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1170 ts = timespec64_to_timespec(iap->ia_mtime);
1171 p = xdr_encode_nfstime4(p, &ts);
1172 } else
1173 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1174 }
1175 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1176 *p++ = cpu_to_be32(label->lfs);
1177 *p++ = cpu_to_be32(label->pi);
1178 *p++ = cpu_to_be32(label->len);
1179 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1180 }
1181 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1182 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1183 *p++ = cpu_to_be32(*umask);
1184 }
1185
1186 /* out: */
1187 }
1188
1189 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1190 {
1191 encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1192 encode_uint32(xdr, access);
1193 }
1194
1195 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1196 {
1197 encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1198 encode_nfs4_seqid(xdr, arg->seqid);
1199 encode_nfs4_stateid(xdr, &arg->stateid);
1200 }
1201
1202 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1203 {
1204 __be32 *p;
1205
1206 encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1207 p = reserve_space(xdr, 12);
1208 p = xdr_encode_hyper(p, args->offset);
1209 *p = cpu_to_be32(args->count);
1210 }
1211
1212 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1213 {
1214 __be32 *p;
1215
1216 encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1217 encode_uint32(xdr, create->ftype);
1218
1219 switch (create->ftype) {
1220 case NF4LNK:
1221 p = reserve_space(xdr, 4);
1222 *p = cpu_to_be32(create->u.symlink.len);
1223 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1224 create->u.symlink.len);
1225 xdr->buf->flags |= XDRBUF_WRITE;
1226 break;
1227
1228 case NF4BLK: case NF4CHR:
1229 p = reserve_space(xdr, 8);
1230 *p++ = cpu_to_be32(create->u.device.specdata1);
1231 *p = cpu_to_be32(create->u.device.specdata2);
1232 break;
1233
1234 default:
1235 break;
1236 }
1237
1238 encode_string(xdr, create->name->len, create->name->name);
1239 encode_attrs(xdr, create->attrs, create->label, &create->umask,
1240 create->server, create->server->attr_bitmask);
1241 }
1242
1243 static void encode_getattr(struct xdr_stream *xdr,
1244 const __u32 *bitmap, const __u32 *mask, size_t len,
1245 struct compound_hdr *hdr)
1246 {
1247 __u32 masked_bitmap[nfs4_fattr_bitmap_maxsz];
1248
1249 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1250 if (mask) {
1251 if (WARN_ON_ONCE(len > ARRAY_SIZE(masked_bitmap)))
1252 len = ARRAY_SIZE(masked_bitmap);
1253 len = mask_bitmap4(bitmap, mask, masked_bitmap, len);
1254 bitmap = masked_bitmap;
1255 }
1256 xdr_encode_bitmap4(xdr, bitmap, len);
1257 }
1258
1259 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1260 {
1261 encode_getattr(xdr, nfs4_fattr_bitmap, bitmask,
1262 ARRAY_SIZE(nfs4_fattr_bitmap), hdr);
1263 }
1264
1265 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1266 const u32 *open_bitmap,
1267 struct compound_hdr *hdr)
1268 {
1269 encode_getattr(xdr, open_bitmap, bitmask, 3, hdr);
1270 }
1271
1272 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1273 {
1274 encode_getattr(xdr, nfs4_fsinfo_bitmap, bitmask,
1275 ARRAY_SIZE(nfs4_fsinfo_bitmap), hdr);
1276 }
1277
1278 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1279 {
1280 encode_getattr(xdr, nfs4_fs_locations_bitmap, bitmask,
1281 ARRAY_SIZE(nfs4_fs_locations_bitmap), hdr);
1282 }
1283
1284 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1285 {
1286 encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1287 }
1288
1289 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1290 {
1291 encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1292 encode_string(xdr, name->len, name->name);
1293 }
1294
1295 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1296 {
1297 if (fl->fl_type == F_RDLCK)
1298 return block ? NFS4_READW_LT : NFS4_READ_LT;
1299 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1300 }
1301
1302 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1303 {
1304 if (fl->fl_end == OFFSET_MAX)
1305 return ~(uint64_t)0;
1306 return fl->fl_end - fl->fl_start + 1;
1307 }
1308
1309 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1310 {
1311 __be32 *p;
1312
1313 p = reserve_space(xdr, 32);
1314 p = xdr_encode_hyper(p, lowner->clientid);
1315 *p++ = cpu_to_be32(20);
1316 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1317 *p++ = cpu_to_be32(lowner->s_dev);
1318 xdr_encode_hyper(p, lowner->id);
1319 }
1320
1321 /*
1322 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1323 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1324 */
1325 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1326 {
1327 __be32 *p;
1328
1329 encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1330 p = reserve_space(xdr, 28);
1331 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1332 *p++ = cpu_to_be32(args->reclaim);
1333 p = xdr_encode_hyper(p, args->fl->fl_start);
1334 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1335 *p = cpu_to_be32(args->new_lock_owner);
1336 if (args->new_lock_owner){
1337 encode_nfs4_seqid(xdr, args->open_seqid);
1338 encode_nfs4_stateid(xdr, &args->open_stateid);
1339 encode_nfs4_seqid(xdr, args->lock_seqid);
1340 encode_lockowner(xdr, &args->lock_owner);
1341 }
1342 else {
1343 encode_nfs4_stateid(xdr, &args->lock_stateid);
1344 encode_nfs4_seqid(xdr, args->lock_seqid);
1345 }
1346 }
1347
1348 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1349 {
1350 __be32 *p;
1351
1352 encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1353 p = reserve_space(xdr, 20);
1354 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1355 p = xdr_encode_hyper(p, args->fl->fl_start);
1356 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1357 encode_lockowner(xdr, &args->lock_owner);
1358 }
1359
1360 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1361 {
1362 __be32 *p;
1363
1364 encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1365 encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1366 encode_nfs4_seqid(xdr, args->seqid);
1367 encode_nfs4_stateid(xdr, &args->stateid);
1368 p = reserve_space(xdr, 16);
1369 p = xdr_encode_hyper(p, args->fl->fl_start);
1370 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1371 }
1372
1373 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1374 {
1375 encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1376 encode_lockowner(xdr, lowner);
1377 }
1378
1379 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1380 {
1381 encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1382 encode_string(xdr, name->len, name->name);
1383 }
1384
1385 static void encode_lookupp(struct xdr_stream *xdr, struct compound_hdr *hdr)
1386 {
1387 encode_op_hdr(xdr, OP_LOOKUPP, decode_lookupp_maxsz, hdr);
1388 }
1389
1390 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1391 {
1392 __be32 *p;
1393
1394 p = reserve_space(xdr, 8);
1395 *p++ = cpu_to_be32(share_access);
1396 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1397 }
1398
1399 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1400 {
1401 __be32 *p;
1402 /*
1403 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1404 * owner 4 = 32
1405 */
1406 encode_nfs4_seqid(xdr, arg->seqid);
1407 encode_share_access(xdr, arg->share_access);
1408 p = reserve_space(xdr, 36);
1409 p = xdr_encode_hyper(p, arg->clientid);
1410 *p++ = cpu_to_be32(24);
1411 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1412 *p++ = cpu_to_be32(arg->server->s_dev);
1413 *p++ = cpu_to_be32(arg->id.uniquifier);
1414 xdr_encode_hyper(p, arg->id.create_time);
1415 }
1416
1417 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1418 {
1419 __be32 *p;
1420
1421 p = reserve_space(xdr, 4);
1422 switch(arg->createmode) {
1423 case NFS4_CREATE_UNCHECKED:
1424 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1425 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1426 arg->server, arg->server->attr_bitmask);
1427 break;
1428 case NFS4_CREATE_GUARDED:
1429 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1430 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1431 arg->server, arg->server->attr_bitmask);
1432 break;
1433 case NFS4_CREATE_EXCLUSIVE:
1434 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1435 encode_nfs4_verifier(xdr, &arg->u.verifier);
1436 break;
1437 case NFS4_CREATE_EXCLUSIVE4_1:
1438 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1439 encode_nfs4_verifier(xdr, &arg->u.verifier);
1440 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1441 arg->server, arg->server->exclcreat_bitmask);
1442 }
1443 }
1444
1445 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1446 {
1447 __be32 *p;
1448
1449 p = reserve_space(xdr, 4);
1450 switch (arg->open_flags & O_CREAT) {
1451 case 0:
1452 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1453 break;
1454 default:
1455 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1456 encode_createmode(xdr, arg);
1457 }
1458 }
1459
1460 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1461 {
1462 __be32 *p;
1463
1464 p = reserve_space(xdr, 4);
1465 switch (delegation_type) {
1466 case 0:
1467 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1468 break;
1469 case FMODE_READ:
1470 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1471 break;
1472 case FMODE_WRITE|FMODE_READ:
1473 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1474 break;
1475 default:
1476 BUG();
1477 }
1478 }
1479
1480 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1481 {
1482 __be32 *p;
1483
1484 p = reserve_space(xdr, 4);
1485 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1486 encode_string(xdr, name->len, name->name);
1487 }
1488
1489 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1490 {
1491 __be32 *p;
1492
1493 p = reserve_space(xdr, 4);
1494 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1495 encode_delegation_type(xdr, type);
1496 }
1497
1498 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1499 {
1500 __be32 *p;
1501
1502 p = reserve_space(xdr, 4);
1503 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1504 encode_nfs4_stateid(xdr, stateid);
1505 encode_string(xdr, name->len, name->name);
1506 }
1507
1508 static inline void encode_claim_fh(struct xdr_stream *xdr)
1509 {
1510 __be32 *p;
1511
1512 p = reserve_space(xdr, 4);
1513 *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1514 }
1515
1516 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1517 {
1518 __be32 *p;
1519
1520 p = reserve_space(xdr, 4);
1521 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1522 encode_nfs4_stateid(xdr, stateid);
1523 }
1524
1525 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1526 {
1527 encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1528 encode_openhdr(xdr, arg);
1529 encode_opentype(xdr, arg);
1530 switch (arg->claim) {
1531 case NFS4_OPEN_CLAIM_NULL:
1532 encode_claim_null(xdr, arg->name);
1533 break;
1534 case NFS4_OPEN_CLAIM_PREVIOUS:
1535 encode_claim_previous(xdr, arg->u.delegation_type);
1536 break;
1537 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1538 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1539 break;
1540 case NFS4_OPEN_CLAIM_FH:
1541 encode_claim_fh(xdr);
1542 break;
1543 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1544 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1545 break;
1546 default:
1547 BUG();
1548 }
1549 }
1550
1551 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1552 {
1553 encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1554 encode_nfs4_stateid(xdr, arg->stateid);
1555 encode_nfs4_seqid(xdr, arg->seqid);
1556 }
1557
1558 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1559 {
1560 encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1561 encode_nfs4_stateid(xdr, &arg->stateid);
1562 encode_nfs4_seqid(xdr, arg->seqid);
1563 encode_share_access(xdr, arg->share_access);
1564 }
1565
1566 static void
1567 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1568 {
1569 encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1570 encode_string(xdr, fh->size, fh->data);
1571 }
1572
1573 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1574 {
1575 encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1576 }
1577
1578 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1579 struct compound_hdr *hdr)
1580 {
1581 __be32 *p;
1582
1583 encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1584 encode_nfs4_stateid(xdr, &args->stateid);
1585
1586 p = reserve_space(xdr, 12);
1587 p = xdr_encode_hyper(p, args->offset);
1588 *p = cpu_to_be32(args->count);
1589 }
1590
1591 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1592 {
1593 uint32_t attrs[3] = {
1594 FATTR4_WORD0_RDATTR_ERROR,
1595 FATTR4_WORD1_MOUNTED_ON_FILEID,
1596 };
1597 uint32_t dircount = readdir->count >> 1;
1598 __be32 *p, verf[2];
1599 uint32_t attrlen = 0;
1600 unsigned int i;
1601
1602 if (readdir->plus) {
1603 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1604 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1605 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1606 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1607 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1608 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1609 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1610 dircount >>= 1;
1611 }
1612 /* Use mounted_on_fileid only if the server supports it */
1613 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1614 attrs[0] |= FATTR4_WORD0_FILEID;
1615 for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1616 attrs[i] &= readdir->bitmask[i];
1617 if (attrs[i] != 0)
1618 attrlen = i+1;
1619 }
1620
1621 encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1622 encode_uint64(xdr, readdir->cookie);
1623 encode_nfs4_verifier(xdr, &readdir->verifier);
1624 p = reserve_space(xdr, 12 + (attrlen << 2));
1625 *p++ = cpu_to_be32(dircount);
1626 *p++ = cpu_to_be32(readdir->count);
1627 *p++ = cpu_to_be32(attrlen);
1628 for (i = 0; i < attrlen; i++)
1629 *p++ = cpu_to_be32(attrs[i]);
1630 memcpy(verf, readdir->verifier.data, sizeof(verf));
1631
1632 dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1633 __func__,
1634 (unsigned long long)readdir->cookie,
1635 verf[0], verf[1],
1636 attrs[0] & readdir->bitmask[0],
1637 attrs[1] & readdir->bitmask[1],
1638 attrs[2] & readdir->bitmask[2]);
1639 }
1640
1641 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1642 {
1643 encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1644 }
1645
1646 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1647 {
1648 encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1649 encode_string(xdr, name->len, name->name);
1650 }
1651
1652 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1653 {
1654 encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1655 encode_string(xdr, oldname->len, oldname->name);
1656 encode_string(xdr, newname->len, newname->name);
1657 }
1658
1659 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1660 struct compound_hdr *hdr)
1661 {
1662 encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1663 encode_uint64(xdr, clid);
1664 }
1665
1666 static void
1667 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1668 {
1669 encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1670 }
1671
1672 static void
1673 encode_setacl(struct xdr_stream *xdr, const struct nfs_setaclargs *arg,
1674 struct compound_hdr *hdr)
1675 {
1676 __be32 *p;
1677
1678 encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1679 encode_nfs4_stateid(xdr, &zero_stateid);
1680 p = reserve_space(xdr, 2*4);
1681 *p++ = cpu_to_be32(1);
1682 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1683 p = reserve_space(xdr, 4);
1684 *p = cpu_to_be32(arg->acl_len);
1685 xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1686 }
1687
1688 static void
1689 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1690 {
1691 encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1692 }
1693
1694 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1695 {
1696 encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1697 encode_nfs4_stateid(xdr, &arg->stateid);
1698 encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1699 server->attr_bitmask);
1700 }
1701
1702 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1703 {
1704 __be32 *p;
1705
1706 encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1707 encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1708
1709 encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1710 setclientid->sc_clnt->cl_owner_id);
1711 p = reserve_space(xdr, 4);
1712 *p = cpu_to_be32(setclientid->sc_prog);
1713 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1714 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1715 p = reserve_space(xdr, 4);
1716 *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1717 }
1718
1719 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1720 {
1721 encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1722 decode_setclientid_confirm_maxsz, hdr);
1723 encode_uint64(xdr, arg->clientid);
1724 encode_nfs4_verifier(xdr, &arg->confirm);
1725 }
1726
1727 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1728 struct compound_hdr *hdr)
1729 {
1730 __be32 *p;
1731
1732 encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1733 encode_nfs4_stateid(xdr, &args->stateid);
1734
1735 p = reserve_space(xdr, 16);
1736 p = xdr_encode_hyper(p, args->offset);
1737 *p++ = cpu_to_be32(args->stable);
1738 *p = cpu_to_be32(args->count);
1739
1740 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1741 }
1742
1743 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1744 {
1745 encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1746 encode_nfs4_stateid(xdr, stateid);
1747 }
1748
1749 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1750 {
1751 encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1752 encode_string(xdr, name->len, name->name);
1753 }
1754
1755 #if defined(CONFIG_NFS_V4_1)
1756 /* NFSv4.1 operations */
1757 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1758 const struct nfs41_bind_conn_to_session_args *args,
1759 struct compound_hdr *hdr)
1760 {
1761 __be32 *p;
1762
1763 encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1764 decode_bind_conn_to_session_maxsz, hdr);
1765 encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1766 p = xdr_reserve_space(xdr, 8);
1767 *p++ = cpu_to_be32(args->dir);
1768 *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1769 }
1770
1771 static void encode_op_map(struct xdr_stream *xdr, const struct nfs4_op_map *op_map)
1772 {
1773 unsigned int i;
1774 encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1775 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1776 encode_uint32(xdr, op_map->u.words[i]);
1777 }
1778
1779 static void encode_exchange_id(struct xdr_stream *xdr,
1780 const struct nfs41_exchange_id_args *args,
1781 struct compound_hdr *hdr)
1782 {
1783 __be32 *p;
1784 char impl_name[IMPL_NAME_LIMIT];
1785 int len = 0;
1786
1787 encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1788 encode_nfs4_verifier(xdr, &args->verifier);
1789
1790 encode_string(xdr, strlen(args->client->cl_owner_id),
1791 args->client->cl_owner_id);
1792
1793 encode_uint32(xdr, args->flags);
1794 encode_uint32(xdr, args->state_protect.how);
1795
1796 switch (args->state_protect.how) {
1797 case SP4_NONE:
1798 break;
1799 case SP4_MACH_CRED:
1800 encode_op_map(xdr, &args->state_protect.enforce);
1801 encode_op_map(xdr, &args->state_protect.allow);
1802 break;
1803 default:
1804 WARN_ON_ONCE(1);
1805 break;
1806 }
1807
1808 if (send_implementation_id &&
1809 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1810 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1811 <= sizeof(impl_name) + 1)
1812 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1813 utsname()->sysname, utsname()->release,
1814 utsname()->version, utsname()->machine);
1815
1816 if (len > 0) {
1817 encode_uint32(xdr, 1); /* implementation id array length=1 */
1818
1819 encode_string(xdr,
1820 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1821 CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1822 encode_string(xdr, len, impl_name);
1823 /* just send zeros for nii_date - the date is in nii_name */
1824 p = reserve_space(xdr, 12);
1825 p = xdr_encode_hyper(p, 0);
1826 *p = cpu_to_be32(0);
1827 } else
1828 encode_uint32(xdr, 0); /* implementation id array length=0 */
1829 }
1830
1831 static void encode_create_session(struct xdr_stream *xdr,
1832 const struct nfs41_create_session_args *args,
1833 struct compound_hdr *hdr)
1834 {
1835 __be32 *p;
1836 struct nfs_client *clp = args->client;
1837 struct rpc_clnt *clnt = clp->cl_rpcclient;
1838 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1839 u32 max_resp_sz_cached;
1840
1841 /*
1842 * Assumes OPEN is the biggest non-idempotent compound.
1843 * 2 is the verifier.
1844 */
1845 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE + 2)
1846 * XDR_UNIT + RPC_MAX_AUTH_SIZE;
1847
1848 encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1849 p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1850 p = xdr_encode_hyper(p, args->clientid);
1851 *p++ = cpu_to_be32(args->seqid); /*Sequence id */
1852 *p++ = cpu_to_be32(args->flags); /*flags */
1853
1854 /* Fore Channel */
1855 *p++ = cpu_to_be32(0); /* header padding size */
1856 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1857 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1858 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1859 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1860 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1861 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1862
1863 /* Back Channel */
1864 *p++ = cpu_to_be32(0); /* header padding size */
1865 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1866 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1867 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1868 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1869 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1870 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1871
1872 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1873 *p++ = cpu_to_be32(1);
1874 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1875
1876 /* authsys_parms rfc1831 */
1877 *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1878 p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1879 *p++ = cpu_to_be32(0); /* UID */
1880 *p++ = cpu_to_be32(0); /* GID */
1881 *p = cpu_to_be32(0); /* No more gids */
1882 }
1883
1884 static void encode_destroy_session(struct xdr_stream *xdr,
1885 const struct nfs4_session *session,
1886 struct compound_hdr *hdr)
1887 {
1888 encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1889 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1890 }
1891
1892 static void encode_destroy_clientid(struct xdr_stream *xdr,
1893 uint64_t clientid,
1894 struct compound_hdr *hdr)
1895 {
1896 encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1897 encode_uint64(xdr, clientid);
1898 }
1899
1900 static void encode_reclaim_complete(struct xdr_stream *xdr,
1901 const struct nfs41_reclaim_complete_args *args,
1902 struct compound_hdr *hdr)
1903 {
1904 encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1905 encode_uint32(xdr, args->one_fs);
1906 }
1907 #endif /* CONFIG_NFS_V4_1 */
1908
1909 static void encode_sequence(struct xdr_stream *xdr,
1910 const struct nfs4_sequence_args *args,
1911 struct compound_hdr *hdr)
1912 {
1913 #if defined(CONFIG_NFS_V4_1)
1914 struct nfs4_session *session;
1915 struct nfs4_slot_table *tp;
1916 struct nfs4_slot *slot = args->sa_slot;
1917 __be32 *p;
1918
1919 tp = slot->table;
1920 session = tp->session;
1921 if (!session)
1922 return;
1923
1924 encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1925
1926 /*
1927 * Sessionid + seqid + slotid + max slotid + cache_this
1928 */
1929 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1930 "max_slotid=%d cache_this=%d\n",
1931 __func__,
1932 ((u32 *)session->sess_id.data)[0],
1933 ((u32 *)session->sess_id.data)[1],
1934 ((u32 *)session->sess_id.data)[2],
1935 ((u32 *)session->sess_id.data)[3],
1936 slot->seq_nr, slot->slot_nr,
1937 tp->highest_used_slotid, args->sa_cache_this);
1938 p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1939 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1940 *p++ = cpu_to_be32(slot->seq_nr);
1941 *p++ = cpu_to_be32(slot->slot_nr);
1942 *p++ = cpu_to_be32(tp->highest_used_slotid);
1943 *p = cpu_to_be32(args->sa_cache_this);
1944 #endif /* CONFIG_NFS_V4_1 */
1945 }
1946
1947 #ifdef CONFIG_NFS_V4_1
1948 static void
1949 encode_getdeviceinfo(struct xdr_stream *xdr,
1950 const struct nfs4_getdeviceinfo_args *args,
1951 struct compound_hdr *hdr)
1952 {
1953 __be32 *p;
1954
1955 encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1956 p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1957 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1958 NFS4_DEVICEID4_SIZE);
1959 *p++ = cpu_to_be32(args->pdev->layout_type);
1960 *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */
1961
1962 p = reserve_space(xdr, 4 + 4);
1963 *p++ = cpu_to_be32(1); /* bitmap length */
1964 *p++ = cpu_to_be32(args->notify_types);
1965 }
1966
1967 static void
1968 encode_layoutget(struct xdr_stream *xdr,
1969 const struct nfs4_layoutget_args *args,
1970 struct compound_hdr *hdr)
1971 {
1972 __be32 *p;
1973
1974 encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1975 p = reserve_space(xdr, 36);
1976 *p++ = cpu_to_be32(0); /* Signal layout available */
1977 *p++ = cpu_to_be32(args->type);
1978 *p++ = cpu_to_be32(args->range.iomode);
1979 p = xdr_encode_hyper(p, args->range.offset);
1980 p = xdr_encode_hyper(p, args->range.length);
1981 p = xdr_encode_hyper(p, args->minlength);
1982 encode_nfs4_stateid(xdr, &args->stateid);
1983 encode_uint32(xdr, args->maxcount);
1984
1985 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1986 __func__,
1987 args->type,
1988 args->range.iomode,
1989 (unsigned long)args->range.offset,
1990 (unsigned long)args->range.length,
1991 args->maxcount);
1992 }
1993
1994 static int
1995 encode_layoutcommit(struct xdr_stream *xdr,
1996 struct inode *inode,
1997 const struct nfs4_layoutcommit_args *args,
1998 struct compound_hdr *hdr)
1999 {
2000 __be32 *p;
2001
2002 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
2003 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
2004
2005 encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2006 p = reserve_space(xdr, 20);
2007 /* Only whole file layouts */
2008 p = xdr_encode_hyper(p, 0); /* offset */
2009 p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
2010 *p = cpu_to_be32(0); /* reclaim */
2011 encode_nfs4_stateid(xdr, &args->stateid);
2012 if (args->lastbytewritten != U64_MAX) {
2013 p = reserve_space(xdr, 20);
2014 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2015 p = xdr_encode_hyper(p, args->lastbytewritten);
2016 } else {
2017 p = reserve_space(xdr, 12);
2018 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2019 }
2020 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2021 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2022
2023 encode_uint32(xdr, args->layoutupdate_len);
2024 if (args->layoutupdate_pages)
2025 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2026 args->layoutupdate_len);
2027
2028 return 0;
2029 }
2030
2031 static void
2032 encode_layoutreturn(struct xdr_stream *xdr,
2033 const struct nfs4_layoutreturn_args *args,
2034 struct compound_hdr *hdr)
2035 {
2036 __be32 *p;
2037
2038 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2039 p = reserve_space(xdr, 16);
2040 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
2041 *p++ = cpu_to_be32(args->layout_type);
2042 *p++ = cpu_to_be32(args->range.iomode);
2043 *p = cpu_to_be32(RETURN_FILE);
2044 p = reserve_space(xdr, 16);
2045 p = xdr_encode_hyper(p, args->range.offset);
2046 p = xdr_encode_hyper(p, args->range.length);
2047 spin_lock(&args->inode->i_lock);
2048 encode_nfs4_stateid(xdr, &args->stateid);
2049 spin_unlock(&args->inode->i_lock);
2050 if (args->ld_private->ops && args->ld_private->ops->encode)
2051 args->ld_private->ops->encode(xdr, args, args->ld_private);
2052 else
2053 encode_uint32(xdr, 0);
2054 }
2055
2056 static int
2057 encode_secinfo_no_name(struct xdr_stream *xdr,
2058 const struct nfs41_secinfo_no_name_args *args,
2059 struct compound_hdr *hdr)
2060 {
2061 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2062 encode_uint32(xdr, args->style);
2063 return 0;
2064 }
2065
2066 static void encode_test_stateid(struct xdr_stream *xdr,
2067 const struct nfs41_test_stateid_args *args,
2068 struct compound_hdr *hdr)
2069 {
2070 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2071 encode_uint32(xdr, 1);
2072 encode_nfs4_stateid(xdr, args->stateid);
2073 }
2074
2075 static void encode_free_stateid(struct xdr_stream *xdr,
2076 const struct nfs41_free_stateid_args *args,
2077 struct compound_hdr *hdr)
2078 {
2079 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2080 encode_nfs4_stateid(xdr, &args->stateid);
2081 }
2082 #else
2083 static inline void
2084 encode_layoutreturn(struct xdr_stream *xdr,
2085 const struct nfs4_layoutreturn_args *args,
2086 struct compound_hdr *hdr)
2087 {
2088 }
2089
2090 static void
2091 encode_layoutget(struct xdr_stream *xdr,
2092 const struct nfs4_layoutget_args *args,
2093 struct compound_hdr *hdr)
2094 {
2095 }
2096 #endif /* CONFIG_NFS_V4_1 */
2097
2098 /*
2099 * END OF "GENERIC" ENCODE ROUTINES.
2100 */
2101
2102 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2103 {
2104 #if defined(CONFIG_NFS_V4_1)
2105 struct nfs4_session *session = args->sa_slot->table->session;
2106 if (session)
2107 return session->clp->cl_mvops->minor_version;
2108 #endif /* CONFIG_NFS_V4_1 */
2109 return 0;
2110 }
2111
2112 /*
2113 * Encode an ACCESS request
2114 */
2115 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2116 const void *data)
2117 {
2118 const struct nfs4_accessargs *args = data;
2119 struct compound_hdr hdr = {
2120 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2121 };
2122
2123 encode_compound_hdr(xdr, req, &hdr);
2124 encode_sequence(xdr, &args->seq_args, &hdr);
2125 encode_putfh(xdr, args->fh, &hdr);
2126 encode_access(xdr, args->access, &hdr);
2127 if (args->bitmask)
2128 encode_getfattr(xdr, args->bitmask, &hdr);
2129 encode_nops(&hdr);
2130 }
2131
2132 /*
2133 * Encode LOOKUP request
2134 */
2135 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2136 const void *data)
2137 {
2138 const struct nfs4_lookup_arg *args = data;
2139 struct compound_hdr hdr = {
2140 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2141 };
2142
2143 encode_compound_hdr(xdr, req, &hdr);
2144 encode_sequence(xdr, &args->seq_args, &hdr);
2145 encode_putfh(xdr, args->dir_fh, &hdr);
2146 encode_lookup(xdr, args->name, &hdr);
2147 encode_getfh(xdr, &hdr);
2148 encode_getfattr(xdr, args->bitmask, &hdr);
2149 encode_nops(&hdr);
2150 }
2151
2152 /*
2153 * Encode LOOKUPP request
2154 */
2155 static void nfs4_xdr_enc_lookupp(struct rpc_rqst *req, struct xdr_stream *xdr,
2156 const void *data)
2157 {
2158 const struct nfs4_lookupp_arg *args = data;
2159 struct compound_hdr hdr = {
2160 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2161 };
2162
2163 encode_compound_hdr(xdr, req, &hdr);
2164 encode_sequence(xdr, &args->seq_args, &hdr);
2165 encode_putfh(xdr, args->fh, &hdr);
2166 encode_lookupp(xdr, &hdr);
2167 encode_getfh(xdr, &hdr);
2168 encode_getfattr(xdr, args->bitmask, &hdr);
2169 encode_nops(&hdr);
2170 }
2171
2172 /*
2173 * Encode LOOKUP_ROOT request
2174 */
2175 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2176 struct xdr_stream *xdr,
2177 const void *data)
2178 {
2179 const struct nfs4_lookup_root_arg *args = data;
2180 struct compound_hdr hdr = {
2181 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2182 };
2183
2184 encode_compound_hdr(xdr, req, &hdr);
2185 encode_sequence(xdr, &args->seq_args, &hdr);
2186 encode_putrootfh(xdr, &hdr);
2187 encode_getfh(xdr, &hdr);
2188 encode_getfattr(xdr, args->bitmask, &hdr);
2189 encode_nops(&hdr);
2190 }
2191
2192 /*
2193 * Encode REMOVE request
2194 */
2195 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2196 const void *data)
2197 {
2198 const struct nfs_removeargs *args = data;
2199 struct compound_hdr hdr = {
2200 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2201 };
2202
2203 encode_compound_hdr(xdr, req, &hdr);
2204 encode_sequence(xdr, &args->seq_args, &hdr);
2205 encode_putfh(xdr, args->fh, &hdr);
2206 encode_remove(xdr, &args->name, &hdr);
2207 encode_nops(&hdr);
2208 }
2209
2210 /*
2211 * Encode RENAME request
2212 */
2213 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2214 const void *data)
2215 {
2216 const struct nfs_renameargs *args = data;
2217 struct compound_hdr hdr = {
2218 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2219 };
2220
2221 encode_compound_hdr(xdr, req, &hdr);
2222 encode_sequence(xdr, &args->seq_args, &hdr);
2223 encode_putfh(xdr, args->old_dir, &hdr);
2224 encode_savefh(xdr, &hdr);
2225 encode_putfh(xdr, args->new_dir, &hdr);
2226 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2227 encode_nops(&hdr);
2228 }
2229
2230 /*
2231 * Encode LINK request
2232 */
2233 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2234 const void *data)
2235 {
2236 const struct nfs4_link_arg *args = data;
2237 struct compound_hdr hdr = {
2238 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2239 };
2240
2241 encode_compound_hdr(xdr, req, &hdr);
2242 encode_sequence(xdr, &args->seq_args, &hdr);
2243 encode_putfh(xdr, args->fh, &hdr);
2244 encode_savefh(xdr, &hdr);
2245 encode_putfh(xdr, args->dir_fh, &hdr);
2246 encode_link(xdr, args->name, &hdr);
2247 encode_restorefh(xdr, &hdr);
2248 encode_getfattr(xdr, args->bitmask, &hdr);
2249 encode_nops(&hdr);
2250 }
2251
2252 /*
2253 * Encode CREATE request
2254 */
2255 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2256 const void *data)
2257 {
2258 const struct nfs4_create_arg *args = data;
2259 struct compound_hdr hdr = {
2260 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2261 };
2262
2263 encode_compound_hdr(xdr, req, &hdr);
2264 encode_sequence(xdr, &args->seq_args, &hdr);
2265 encode_putfh(xdr, args->dir_fh, &hdr);
2266 encode_create(xdr, args, &hdr);
2267 encode_getfh(xdr, &hdr);
2268 encode_getfattr(xdr, args->bitmask, &hdr);
2269 encode_nops(&hdr);
2270 }
2271
2272 /*
2273 * Encode SYMLINK request
2274 */
2275 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2276 const void *data)
2277 {
2278 const struct nfs4_create_arg *args = data;
2279
2280 nfs4_xdr_enc_create(req, xdr, args);
2281 }
2282
2283 /*
2284 * Encode GETATTR request
2285 */
2286 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2287 const void *data)
2288 {
2289 const struct nfs4_getattr_arg *args = data;
2290 struct compound_hdr hdr = {
2291 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2292 };
2293
2294 encode_compound_hdr(xdr, req, &hdr);
2295 encode_sequence(xdr, &args->seq_args, &hdr);
2296 encode_putfh(xdr, args->fh, &hdr);
2297 encode_getfattr(xdr, args->bitmask, &hdr);
2298 encode_nops(&hdr);
2299 }
2300
2301 /*
2302 * Encode a CLOSE request
2303 */
2304 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2305 const void *data)
2306 {
2307 const struct nfs_closeargs *args = data;
2308 struct compound_hdr hdr = {
2309 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2310 };
2311
2312 encode_compound_hdr(xdr, req, &hdr);
2313 encode_sequence(xdr, &args->seq_args, &hdr);
2314 encode_putfh(xdr, args->fh, &hdr);
2315 if (args->lr_args)
2316 encode_layoutreturn(xdr, args->lr_args, &hdr);
2317 if (args->bitmask != NULL)
2318 encode_getfattr(xdr, args->bitmask, &hdr);
2319 encode_close(xdr, args, &hdr);
2320 encode_nops(&hdr);
2321 }
2322
2323 /*
2324 * Encode an OPEN request
2325 */
2326 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2327 const void *data)
2328 {
2329 const struct nfs_openargs *args = data;
2330 struct compound_hdr hdr = {
2331 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2332 };
2333
2334 encode_compound_hdr(xdr, req, &hdr);
2335 encode_sequence(xdr, &args->seq_args, &hdr);
2336 encode_putfh(xdr, args->fh, &hdr);
2337 encode_open(xdr, args, &hdr);
2338 encode_getfh(xdr, &hdr);
2339 if (args->access)
2340 encode_access(xdr, args->access, &hdr);
2341 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2342 if (args->lg_args) {
2343 encode_layoutget(xdr, args->lg_args, &hdr);
2344 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2345 args->lg_args->layout.pglen,
2346 hdr.replen);
2347 }
2348 encode_nops(&hdr);
2349 }
2350
2351 /*
2352 * Encode an OPEN_CONFIRM request
2353 */
2354 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2355 struct xdr_stream *xdr,
2356 const void *data)
2357 {
2358 const struct nfs_open_confirmargs *args = data;
2359 struct compound_hdr hdr = {
2360 .nops = 0,
2361 };
2362
2363 encode_compound_hdr(xdr, req, &hdr);
2364 encode_putfh(xdr, args->fh, &hdr);
2365 encode_open_confirm(xdr, args, &hdr);
2366 encode_nops(&hdr);
2367 }
2368
2369 /*
2370 * Encode an OPEN request with no attributes.
2371 */
2372 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2373 struct xdr_stream *xdr,
2374 const void *data)
2375 {
2376 const struct nfs_openargs *args = data;
2377 struct compound_hdr hdr = {
2378 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2379 };
2380
2381 encode_compound_hdr(xdr, req, &hdr);
2382 encode_sequence(xdr, &args->seq_args, &hdr);
2383 encode_putfh(xdr, args->fh, &hdr);
2384 encode_open(xdr, args, &hdr);
2385 if (args->access)
2386 encode_access(xdr, args->access, &hdr);
2387 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2388 if (args->lg_args) {
2389 encode_layoutget(xdr, args->lg_args, &hdr);
2390 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2391 args->lg_args->layout.pglen,
2392 hdr.replen);
2393 }
2394 encode_nops(&hdr);
2395 }
2396
2397 /*
2398 * Encode an OPEN_DOWNGRADE request
2399 */
2400 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2401 struct xdr_stream *xdr,
2402 const void *data)
2403 {
2404 const struct nfs_closeargs *args = data;
2405 struct compound_hdr hdr = {
2406 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2407 };
2408
2409 encode_compound_hdr(xdr, req, &hdr);
2410 encode_sequence(xdr, &args->seq_args, &hdr);
2411 encode_putfh(xdr, args->fh, &hdr);
2412 if (args->lr_args)
2413 encode_layoutreturn(xdr, args->lr_args, &hdr);
2414 encode_open_downgrade(xdr, args, &hdr);
2415 encode_nops(&hdr);
2416 }
2417
2418 /*
2419 * Encode a LOCK request
2420 */
2421 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2422 const void *data)
2423 {
2424 const struct nfs_lock_args *args = data;
2425 struct compound_hdr hdr = {
2426 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2427 };
2428
2429 encode_compound_hdr(xdr, req, &hdr);
2430 encode_sequence(xdr, &args->seq_args, &hdr);
2431 encode_putfh(xdr, args->fh, &hdr);
2432 encode_lock(xdr, args, &hdr);
2433 encode_nops(&hdr);
2434 }
2435
2436 /*
2437 * Encode a LOCKT request
2438 */
2439 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2440 const void *data)
2441 {
2442 const struct nfs_lockt_args *args = data;
2443 struct compound_hdr hdr = {
2444 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2445 };
2446
2447 encode_compound_hdr(xdr, req, &hdr);
2448 encode_sequence(xdr, &args->seq_args, &hdr);
2449 encode_putfh(xdr, args->fh, &hdr);
2450 encode_lockt(xdr, args, &hdr);
2451 encode_nops(&hdr);
2452 }
2453
2454 /*
2455 * Encode a LOCKU request
2456 */
2457 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2458 const void *data)
2459 {
2460 const struct nfs_locku_args *args = data;
2461 struct compound_hdr hdr = {
2462 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2463 };
2464
2465 encode_compound_hdr(xdr, req, &hdr);
2466 encode_sequence(xdr, &args->seq_args, &hdr);
2467 encode_putfh(xdr, args->fh, &hdr);
2468 encode_locku(xdr, args, &hdr);
2469 encode_nops(&hdr);
2470 }
2471
2472 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2473 struct xdr_stream *xdr,
2474 const void *data)
2475 {
2476 const struct nfs_release_lockowner_args *args = data;
2477 struct compound_hdr hdr = {
2478 .minorversion = 0,
2479 };
2480
2481 encode_compound_hdr(xdr, req, &hdr);
2482 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2483 encode_nops(&hdr);
2484 }
2485
2486 /*
2487 * Encode a READLINK request
2488 */
2489 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2490 const void *data)
2491 {
2492 const struct nfs4_readlink *args = data;
2493 struct compound_hdr hdr = {
2494 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2495 };
2496
2497 encode_compound_hdr(xdr, req, &hdr);
2498 encode_sequence(xdr, &args->seq_args, &hdr);
2499 encode_putfh(xdr, args->fh, &hdr);
2500 encode_readlink(xdr, args, req, &hdr);
2501
2502 rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2503 args->pglen, hdr.replen);
2504 encode_nops(&hdr);
2505 }
2506
2507 /*
2508 * Encode a READDIR request
2509 */
2510 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2511 const void *data)
2512 {
2513 const struct nfs4_readdir_arg *args = data;
2514 struct compound_hdr hdr = {
2515 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2516 };
2517
2518 encode_compound_hdr(xdr, req, &hdr);
2519 encode_sequence(xdr, &args->seq_args, &hdr);
2520 encode_putfh(xdr, args->fh, &hdr);
2521 encode_readdir(xdr, args, req, &hdr);
2522
2523 rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2524 args->count, hdr.replen);
2525 encode_nops(&hdr);
2526 }
2527
2528 /*
2529 * Encode a READ request
2530 */
2531 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2532 const void *data)
2533 {
2534 const struct nfs_pgio_args *args = data;
2535 struct compound_hdr hdr = {
2536 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2537 };
2538
2539 encode_compound_hdr(xdr, req, &hdr);
2540 encode_sequence(xdr, &args->seq_args, &hdr);
2541 encode_putfh(xdr, args->fh, &hdr);
2542 encode_read(xdr, args, &hdr);
2543
2544 rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2545 args->count, hdr.replen);
2546 req->rq_rcv_buf.flags |= XDRBUF_READ;
2547 encode_nops(&hdr);
2548 }
2549
2550 /*
2551 * Encode an SETATTR request
2552 */
2553 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2554 const void *data)
2555 {
2556 const struct nfs_setattrargs *args = data;
2557 struct compound_hdr hdr = {
2558 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2559 };
2560
2561 encode_compound_hdr(xdr, req, &hdr);
2562 encode_sequence(xdr, &args->seq_args, &hdr);
2563 encode_putfh(xdr, args->fh, &hdr);
2564 encode_setattr(xdr, args, args->server, &hdr);
2565 encode_getfattr(xdr, args->bitmask, &hdr);
2566 encode_nops(&hdr);
2567 }
2568
2569 /*
2570 * Encode a GETACL request
2571 */
2572 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2573 const void *data)
2574 {
2575 const struct nfs_getaclargs *args = data;
2576 struct compound_hdr hdr = {
2577 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2578 };
2579 const __u32 nfs4_acl_bitmap[1] = {
2580 [0] = FATTR4_WORD0_ACL,
2581 };
2582 uint32_t replen;
2583
2584 encode_compound_hdr(xdr, req, &hdr);
2585 encode_sequence(xdr, &args->seq_args, &hdr);
2586 encode_putfh(xdr, args->fh, &hdr);
2587 replen = hdr.replen + op_decode_hdr_maxsz;
2588 encode_getattr(xdr, nfs4_acl_bitmap, NULL,
2589 ARRAY_SIZE(nfs4_acl_bitmap), &hdr);
2590
2591 rpc_prepare_reply_pages(req, args->acl_pages, 0,
2592 args->acl_len, replen + 1);
2593 encode_nops(&hdr);
2594 }
2595
2596 /*
2597 * Encode a WRITE request
2598 */
2599 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2600 const void *data)
2601 {
2602 const struct nfs_pgio_args *args = data;
2603 struct compound_hdr hdr = {
2604 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2605 };
2606
2607 encode_compound_hdr(xdr, req, &hdr);
2608 encode_sequence(xdr, &args->seq_args, &hdr);
2609 encode_putfh(xdr, args->fh, &hdr);
2610 encode_write(xdr, args, &hdr);
2611 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2612 if (args->bitmask)
2613 encode_getfattr(xdr, args->bitmask, &hdr);
2614 encode_nops(&hdr);
2615 }
2616
2617 /*
2618 * a COMMIT request
2619 */
2620 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2621 const void *data)
2622 {
2623 const struct nfs_commitargs *args = data;
2624 struct compound_hdr hdr = {
2625 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2626 };
2627
2628 encode_compound_hdr(xdr, req, &hdr);
2629 encode_sequence(xdr, &args->seq_args, &hdr);
2630 encode_putfh(xdr, args->fh, &hdr);
2631 encode_commit(xdr, args, &hdr);
2632 encode_nops(&hdr);
2633 }
2634
2635 /*
2636 * FSINFO request
2637 */
2638 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2639 const void *data)
2640 {
2641 const struct nfs4_fsinfo_arg *args = data;
2642 struct compound_hdr hdr = {
2643 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2644 };
2645
2646 encode_compound_hdr(xdr, req, &hdr);
2647 encode_sequence(xdr, &args->seq_args, &hdr);
2648 encode_putfh(xdr, args->fh, &hdr);
2649 encode_fsinfo(xdr, args->bitmask, &hdr);
2650 encode_nops(&hdr);
2651 }
2652
2653 /*
2654 * a PATHCONF request
2655 */
2656 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2657 const void *data)
2658 {
2659 const struct nfs4_pathconf_arg *args = data;
2660 struct compound_hdr hdr = {
2661 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2662 };
2663
2664 encode_compound_hdr(xdr, req, &hdr);
2665 encode_sequence(xdr, &args->seq_args, &hdr);
2666 encode_putfh(xdr, args->fh, &hdr);
2667 encode_getattr(xdr, nfs4_pathconf_bitmap, args->bitmask,
2668 ARRAY_SIZE(nfs4_pathconf_bitmap), &hdr);
2669 encode_nops(&hdr);
2670 }
2671
2672 /*
2673 * a STATFS request
2674 */
2675 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2676 const void *data)
2677 {
2678 const struct nfs4_statfs_arg *args = data;
2679 struct compound_hdr hdr = {
2680 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2681 };
2682
2683 encode_compound_hdr(xdr, req, &hdr);
2684 encode_sequence(xdr, &args->seq_args, &hdr);
2685 encode_putfh(xdr, args->fh, &hdr);
2686 encode_getattr(xdr, nfs4_statfs_bitmap, args->bitmask,
2687 ARRAY_SIZE(nfs4_statfs_bitmap), &hdr);
2688 encode_nops(&hdr);
2689 }
2690
2691 /*
2692 * GETATTR_BITMAP request
2693 */
2694 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2695 struct xdr_stream *xdr,
2696 const void *data)
2697 {
2698 const struct nfs4_server_caps_arg *args = data;
2699 const u32 *bitmask = args->bitmask;
2700 struct compound_hdr hdr = {
2701 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2702 };
2703
2704 encode_compound_hdr(xdr, req, &hdr);
2705 encode_sequence(xdr, &args->seq_args, &hdr);
2706 encode_putfh(xdr, args->fhandle, &hdr);
2707 encode_getattr(xdr, bitmask, NULL, 3, &hdr);
2708 encode_nops(&hdr);
2709 }
2710
2711 /*
2712 * a RENEW request
2713 */
2714 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2715 const void *data)
2716
2717 {
2718 const struct nfs_client *clp = data;
2719 struct compound_hdr hdr = {
2720 .nops = 0,
2721 };
2722
2723 encode_compound_hdr(xdr, req, &hdr);
2724 encode_renew(xdr, clp->cl_clientid, &hdr);
2725 encode_nops(&hdr);
2726 }
2727
2728 /*
2729 * a SETCLIENTID request
2730 */
2731 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2732 struct xdr_stream *xdr,
2733 const void *data)
2734 {
2735 const struct nfs4_setclientid *sc = data;
2736 struct compound_hdr hdr = {
2737 .nops = 0,
2738 };
2739
2740 encode_compound_hdr(xdr, req, &hdr);
2741 encode_setclientid(xdr, sc, &hdr);
2742 encode_nops(&hdr);
2743 }
2744
2745 /*
2746 * a SETCLIENTID_CONFIRM request
2747 */
2748 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2749 struct xdr_stream *xdr,
2750 const void *data)
2751 {
2752 const struct nfs4_setclientid_res *arg = data;
2753 struct compound_hdr hdr = {
2754 .nops = 0,
2755 };
2756
2757 encode_compound_hdr(xdr, req, &hdr);
2758 encode_setclientid_confirm(xdr, arg, &hdr);
2759 encode_nops(&hdr);
2760 }
2761
2762 /*
2763 * DELEGRETURN request
2764 */
2765 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2766 struct xdr_stream *xdr,
2767 const void *data)
2768 {
2769 const struct nfs4_delegreturnargs *args = data;
2770 struct compound_hdr hdr = {
2771 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2772 };
2773
2774 encode_compound_hdr(xdr, req, &hdr);
2775 encode_sequence(xdr, &args->seq_args, &hdr);
2776 encode_putfh(xdr, args->fhandle, &hdr);
2777 if (args->lr_args)
2778 encode_layoutreturn(xdr, args->lr_args, &hdr);
2779 if (args->bitmask)
2780 encode_getfattr(xdr, args->bitmask, &hdr);
2781 encode_delegreturn(xdr, args->stateid, &hdr);
2782 encode_nops(&hdr);
2783 }
2784
2785 /*
2786 * Encode FS_LOCATIONS request
2787 */
2788 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2789 struct xdr_stream *xdr,
2790 const void *data)
2791 {
2792 const struct nfs4_fs_locations_arg *args = data;
2793 struct compound_hdr hdr = {
2794 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2795 };
2796 uint32_t replen;
2797
2798 encode_compound_hdr(xdr, req, &hdr);
2799 encode_sequence(xdr, &args->seq_args, &hdr);
2800 if (args->migration) {
2801 encode_putfh(xdr, args->fh, &hdr);
2802 replen = hdr.replen;
2803 encode_fs_locations(xdr, args->bitmask, &hdr);
2804 if (args->renew)
2805 encode_renew(xdr, args->clientid, &hdr);
2806 } else {
2807 encode_putfh(xdr, args->dir_fh, &hdr);
2808 encode_lookup(xdr, args->name, &hdr);
2809 replen = hdr.replen;
2810 encode_fs_locations(xdr, args->bitmask, &hdr);
2811 }
2812
2813 rpc_prepare_reply_pages(req, (struct page **)&args->page, 0,
2814 PAGE_SIZE, replen + 1);
2815 encode_nops(&hdr);
2816 }
2817
2818 /*
2819 * Encode SECINFO request
2820 */
2821 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2822 struct xdr_stream *xdr,
2823 const void *data)
2824 {
2825 const struct nfs4_secinfo_arg *args = data;
2826 struct compound_hdr hdr = {
2827 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2828 };
2829
2830 encode_compound_hdr(xdr, req, &hdr);
2831 encode_sequence(xdr, &args->seq_args, &hdr);
2832 encode_putfh(xdr, args->dir_fh, &hdr);
2833 encode_secinfo(xdr, args->name, &hdr);
2834 encode_nops(&hdr);
2835 }
2836
2837 /*
2838 * Encode FSID_PRESENT request
2839 */
2840 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2841 struct xdr_stream *xdr,
2842 const void *data)
2843 {
2844 const struct nfs4_fsid_present_arg *args = data;
2845 struct compound_hdr hdr = {
2846 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2847 };
2848
2849 encode_compound_hdr(xdr, req, &hdr);
2850 encode_sequence(xdr, &args->seq_args, &hdr);
2851 encode_putfh(xdr, args->fh, &hdr);
2852 encode_getfh(xdr, &hdr);
2853 if (args->renew)
2854 encode_renew(xdr, args->clientid, &hdr);
2855 encode_nops(&hdr);
2856 }
2857
2858 #if defined(CONFIG_NFS_V4_1)
2859 /*
2860 * BIND_CONN_TO_SESSION request
2861 */
2862 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2863 struct xdr_stream *xdr,
2864 const void *data)
2865 {
2866 const struct nfs41_bind_conn_to_session_args *args = data;
2867 struct compound_hdr hdr = {
2868 .minorversion = args->client->cl_mvops->minor_version,
2869 };
2870
2871 encode_compound_hdr(xdr, req, &hdr);
2872 encode_bind_conn_to_session(xdr, args, &hdr);
2873 encode_nops(&hdr);
2874 }
2875
2876 /*
2877 * EXCHANGE_ID request
2878 */
2879 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2880 struct xdr_stream *xdr,
2881 const void *data)
2882 {
2883 const struct nfs41_exchange_id_args *args = data;
2884 struct compound_hdr hdr = {
2885 .minorversion = args->client->cl_mvops->minor_version,
2886 };
2887
2888 encode_compound_hdr(xdr, req, &hdr);
2889 encode_exchange_id(xdr, args, &hdr);
2890 encode_nops(&hdr);
2891 }
2892
2893 /*
2894 * a CREATE_SESSION request
2895 */
2896 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2897 struct xdr_stream *xdr,
2898 const void *data)
2899 {
2900 const struct nfs41_create_session_args *args = data;
2901 struct compound_hdr hdr = {
2902 .minorversion = args->client->cl_mvops->minor_version,
2903 };
2904
2905 encode_compound_hdr(xdr, req, &hdr);
2906 encode_create_session(xdr, args, &hdr);
2907 encode_nops(&hdr);
2908 }
2909
2910 /*
2911 * a DESTROY_SESSION request
2912 */
2913 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2914 struct xdr_stream *xdr,
2915 const void *data)
2916 {
2917 const struct nfs4_session *session = data;
2918 struct compound_hdr hdr = {
2919 .minorversion = session->clp->cl_mvops->minor_version,
2920 };
2921
2922 encode_compound_hdr(xdr, req, &hdr);
2923 encode_destroy_session(xdr, session, &hdr);
2924 encode_nops(&hdr);
2925 }
2926
2927 /*
2928 * a DESTROY_CLIENTID request
2929 */
2930 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2931 struct xdr_stream *xdr,
2932 const void *data)
2933 {
2934 const struct nfs_client *clp = data;
2935 struct compound_hdr hdr = {
2936 .minorversion = clp->cl_mvops->minor_version,
2937 };
2938
2939 encode_compound_hdr(xdr, req, &hdr);
2940 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2941 encode_nops(&hdr);
2942 }
2943
2944 /*
2945 * a SEQUENCE request
2946 */
2947 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2948 const void *data)
2949 {
2950 const struct nfs4_sequence_args *args = data;
2951 struct compound_hdr hdr = {
2952 .minorversion = nfs4_xdr_minorversion(args),
2953 };
2954
2955 encode_compound_hdr(xdr, req, &hdr);
2956 encode_sequence(xdr, args, &hdr);
2957 encode_nops(&hdr);
2958 }
2959
2960 /*
2961 * a GET_LEASE_TIME request
2962 */
2963 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2964 struct xdr_stream *xdr,
2965 const void *data)
2966 {
2967 const struct nfs4_get_lease_time_args *args = data;
2968 struct compound_hdr hdr = {
2969 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2970 };
2971 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2972
2973 encode_compound_hdr(xdr, req, &hdr);
2974 encode_sequence(xdr, &args->la_seq_args, &hdr);
2975 encode_putrootfh(xdr, &hdr);
2976 encode_fsinfo(xdr, lease_bitmap, &hdr);
2977 encode_nops(&hdr);
2978 }
2979
2980 /*
2981 * a RECLAIM_COMPLETE request
2982 */
2983 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2984 struct xdr_stream *xdr,
2985 const void *data)
2986 {
2987 const struct nfs41_reclaim_complete_args *args = data;
2988 struct compound_hdr hdr = {
2989 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2990 };
2991
2992 encode_compound_hdr(xdr, req, &hdr);
2993 encode_sequence(xdr, &args->seq_args, &hdr);
2994 encode_reclaim_complete(xdr, args, &hdr);
2995 encode_nops(&hdr);
2996 }
2997
2998 /*
2999 * Encode GETDEVICEINFO request
3000 */
3001 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
3002 struct xdr_stream *xdr,
3003 const void *data)
3004 {
3005 const struct nfs4_getdeviceinfo_args *args = data;
3006 struct compound_hdr hdr = {
3007 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3008 };
3009
3010 encode_compound_hdr(xdr, req, &hdr);
3011 encode_sequence(xdr, &args->seq_args, &hdr);
3012 encode_getdeviceinfo(xdr, args, &hdr);
3013
3014 /* set up reply kvec. Subtract notification bitmap max size (2)
3015 * so that notification bitmap is put in xdr_buf tail */
3016 rpc_prepare_reply_pages(req, args->pdev->pages, args->pdev->pgbase,
3017 args->pdev->pglen, hdr.replen - 2);
3018 encode_nops(&hdr);
3019 }
3020
3021 /*
3022 * Encode LAYOUTGET request
3023 */
3024 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
3025 struct xdr_stream *xdr,
3026 const void *data)
3027 {
3028 const struct nfs4_layoutget_args *args = data;
3029 struct compound_hdr hdr = {
3030 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3031 };
3032
3033 encode_compound_hdr(xdr, req, &hdr);
3034 encode_sequence(xdr, &args->seq_args, &hdr);
3035 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3036 encode_layoutget(xdr, args, &hdr);
3037
3038 rpc_prepare_reply_pages(req, args->layout.pages, 0,
3039 args->layout.pglen, hdr.replen);
3040 encode_nops(&hdr);
3041 }
3042
3043 /*
3044 * Encode LAYOUTCOMMIT request
3045 */
3046 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3047 struct xdr_stream *xdr,
3048 const void *priv)
3049 {
3050 const struct nfs4_layoutcommit_args *args = priv;
3051 struct nfs4_layoutcommit_data *data =
3052 container_of(args, struct nfs4_layoutcommit_data, args);
3053 struct compound_hdr hdr = {
3054 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3055 };
3056
3057 encode_compound_hdr(xdr, req, &hdr);
3058 encode_sequence(xdr, &args->seq_args, &hdr);
3059 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3060 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3061 encode_getfattr(xdr, args->bitmask, &hdr);
3062 encode_nops(&hdr);
3063 }
3064
3065 /*
3066 * Encode LAYOUTRETURN request
3067 */
3068 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3069 struct xdr_stream *xdr,
3070 const void *data)
3071 {
3072 const struct nfs4_layoutreturn_args *args = data;
3073 struct compound_hdr hdr = {
3074 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3075 };
3076
3077 encode_compound_hdr(xdr, req, &hdr);
3078 encode_sequence(xdr, &args->seq_args, &hdr);
3079 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3080 encode_layoutreturn(xdr, args, &hdr);
3081 encode_nops(&hdr);
3082 }
3083
3084 /*
3085 * Encode SECINFO_NO_NAME request
3086 */
3087 static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3088 struct xdr_stream *xdr,
3089 const void *data)
3090 {
3091 const struct nfs41_secinfo_no_name_args *args = data;
3092 struct compound_hdr hdr = {
3093 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3094 };
3095
3096 encode_compound_hdr(xdr, req, &hdr);
3097 encode_sequence(xdr, &args->seq_args, &hdr);
3098 encode_putrootfh(xdr, &hdr);
3099 encode_secinfo_no_name(xdr, args, &hdr);
3100 encode_nops(&hdr);
3101 }
3102
3103 /*
3104 * Encode TEST_STATEID request
3105 */
3106 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3107 struct xdr_stream *xdr,
3108 const void *data)
3109 {
3110 const struct nfs41_test_stateid_args *args = data;
3111 struct compound_hdr hdr = {
3112 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3113 };
3114
3115 encode_compound_hdr(xdr, req, &hdr);
3116 encode_sequence(xdr, &args->seq_args, &hdr);
3117 encode_test_stateid(xdr, args, &hdr);
3118 encode_nops(&hdr);
3119 }
3120
3121 /*
3122 * Encode FREE_STATEID request
3123 */
3124 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3125 struct xdr_stream *xdr,
3126 const void *data)
3127 {
3128 const struct nfs41_free_stateid_args *args = data;
3129 struct compound_hdr hdr = {
3130 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3131 };
3132
3133 encode_compound_hdr(xdr, req, &hdr);
3134 encode_sequence(xdr, &args->seq_args, &hdr);
3135 encode_free_stateid(xdr, args, &hdr);
3136 encode_nops(&hdr);
3137 }
3138 #endif /* CONFIG_NFS_V4_1 */
3139
3140 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3141 {
3142 ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3143 NFS4_OPAQUE_LIMIT);
3144 if (unlikely(ret < 0))
3145 return -EIO;
3146 *len = ret;
3147 return 0;
3148 }
3149
3150 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3151 {
3152 __be32 *p;
3153
3154 p = xdr_inline_decode(xdr, 8);
3155 if (unlikely(!p))
3156 return -EIO;
3157 hdr->status = be32_to_cpup(p++);
3158 hdr->taglen = be32_to_cpup(p);
3159
3160 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3161 if (unlikely(!p))
3162 return -EIO;
3163 hdr->tag = (char *)p;
3164 p += XDR_QUADLEN(hdr->taglen);
3165 hdr->nops = be32_to_cpup(p);
3166 if (unlikely(hdr->nops < 1))
3167 return nfs4_stat_to_errno(hdr->status);
3168 return 0;
3169 }
3170
3171 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3172 int *nfs_retval)
3173 {
3174 __be32 *p;
3175 uint32_t opnum;
3176 int32_t nfserr;
3177
3178 p = xdr_inline_decode(xdr, 8);
3179 if (unlikely(!p))
3180 goto out_overflow;
3181 opnum = be32_to_cpup(p++);
3182 if (unlikely(opnum != expected))
3183 goto out_bad_operation;
3184 if (unlikely(*p != cpu_to_be32(NFS_OK)))
3185 goto out_status;
3186 *nfs_retval = 0;
3187 return true;
3188 out_status:
3189 nfserr = be32_to_cpup(p);
3190 trace_nfs4_xdr_status(opnum, nfserr);
3191 *nfs_retval = nfs4_stat_to_errno(nfserr);
3192 return true;
3193 out_bad_operation:
3194 dprintk("nfs: Server returned operation"
3195 " %d but we issued a request for %d\n",
3196 opnum, expected);
3197 *nfs_retval = -EREMOTEIO;
3198 return false;
3199 out_overflow:
3200 *nfs_retval = -EIO;
3201 return false;
3202 }
3203
3204 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3205 {
3206 int retval;
3207
3208 __decode_op_hdr(xdr, expected, &retval);
3209 return retval;
3210 }
3211
3212 /* Dummy routine */
3213 static int decode_ace(struct xdr_stream *xdr, void *ace)
3214 {
3215 __be32 *p;
3216 unsigned int strlen;
3217 char *str;
3218
3219 p = xdr_inline_decode(xdr, 12);
3220 if (unlikely(!p))
3221 return -EIO;
3222 return decode_opaque_inline(xdr, &strlen, &str);
3223 }
3224
3225 static ssize_t
3226 decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
3227 {
3228 ssize_t ret;
3229
3230 ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
3231 if (likely(ret >= 0))
3232 return ret;
3233 if (ret != -EMSGSIZE)
3234 return -EIO;
3235 return sz;
3236 }
3237
3238 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3239 {
3240 ssize_t ret;
3241 ret = decode_bitmap4(xdr, bitmap, 3);
3242 return ret < 0 ? ret : 0;
3243 }
3244
3245 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3246 {
3247 __be32 *p;
3248
3249 p = xdr_inline_decode(xdr, 4);
3250 if (unlikely(!p))
3251 return -EIO;
3252 *attrlen = be32_to_cpup(p);
3253 *savep = xdr_stream_pos(xdr);
3254 return 0;
3255 }
3256
3257 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3258 {
3259 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3260 int ret;
3261 ret = decode_attr_bitmap(xdr, bitmask);
3262 if (unlikely(ret < 0))
3263 return ret;
3264 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3265 } else
3266 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3267 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3268 bitmask[0], bitmask[1], bitmask[2]);
3269 return 0;
3270 }
3271
3272 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3273 {
3274 __be32 *p;
3275 int ret = 0;
3276
3277 *type = 0;
3278 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3279 return -EIO;
3280 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3281 p = xdr_inline_decode(xdr, 4);
3282 if (unlikely(!p))
3283 return -EIO;
3284 *type = be32_to_cpup(p);
3285 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3286 dprintk("%s: bad type %d\n", __func__, *type);
3287 return -EIO;
3288 }
3289 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3290 ret = NFS_ATTR_FATTR_TYPE;
3291 }
3292 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3293 return ret;
3294 }
3295
3296 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3297 uint32_t *bitmap, uint32_t *type)
3298 {
3299 __be32 *p;
3300
3301 *type = 0;
3302 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3303 return -EIO;
3304 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3305 p = xdr_inline_decode(xdr, 4);
3306 if (unlikely(!p))
3307 return -EIO;
3308 *type = be32_to_cpup(p);
3309 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3310 }
3311 dprintk("%s: expire type=0x%x\n", __func__, *type);
3312 return 0;
3313 }
3314
3315 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3316 {
3317 __be32 *p;
3318 int ret = 0;
3319
3320 *change = 0;
3321 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3322 return -EIO;
3323 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3324 p = xdr_inline_decode(xdr, 8);
3325 if (unlikely(!p))
3326 return -EIO;
3327 xdr_decode_hyper(p, change);
3328 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3329 ret = NFS_ATTR_FATTR_CHANGE;
3330 }
3331 dprintk("%s: change attribute=%Lu\n", __func__,
3332 (unsigned long long)*change);
3333 return ret;
3334 }
3335
3336 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3337 {
3338 __be32 *p;
3339 int ret = 0;
3340
3341 *size = 0;
3342 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3343 return -EIO;
3344 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3345 p = xdr_inline_decode(xdr, 8);
3346 if (unlikely(!p))
3347 return -EIO;
3348 xdr_decode_hyper(p, size);
3349 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3350 ret = NFS_ATTR_FATTR_SIZE;
3351 }
3352 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3353 return ret;
3354 }
3355
3356 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3357 {
3358 __be32 *p;
3359
3360 *res = 0;
3361 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3362 return -EIO;
3363 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3364 p = xdr_inline_decode(xdr, 4);
3365 if (unlikely(!p))
3366 return -EIO;
3367 *res = be32_to_cpup(p);
3368 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3369 }
3370 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3371 return 0;
3372 }
3373
3374 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3375 {
3376 __be32 *p;
3377
3378 *res = 0;
3379 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3380 return -EIO;
3381 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3382 p = xdr_inline_decode(xdr, 4);
3383 if (unlikely(!p))
3384 return -EIO;
3385 *res = be32_to_cpup(p);
3386 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3387 }
3388 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3389 return 0;
3390 }
3391
3392 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3393 {
3394 __be32 *p;
3395 int ret = 0;
3396
3397 fsid->major = 0;
3398 fsid->minor = 0;
3399 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3400 return -EIO;
3401 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3402 p = xdr_inline_decode(xdr, 16);
3403 if (unlikely(!p))
3404 return -EIO;
3405 p = xdr_decode_hyper(p, &fsid->major);
3406 xdr_decode_hyper(p, &fsid->minor);
3407 bitmap[0] &= ~FATTR4_WORD0_FSID;
3408 ret = NFS_ATTR_FATTR_FSID;
3409 }
3410 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3411 (unsigned long long)fsid->major,
3412 (unsigned long long)fsid->minor);
3413 return ret;
3414 }
3415
3416 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3417 {
3418 __be32 *p;
3419
3420 *res = 60;
3421 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3422 return -EIO;
3423 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3424 p = xdr_inline_decode(xdr, 4);
3425 if (unlikely(!p))
3426 return -EIO;
3427 *res = be32_to_cpup(p);
3428 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3429 }
3430 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3431 return 0;
3432 }
3433
3434 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3435 {
3436 __be32 *p;
3437
3438 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3439 return -EIO;
3440 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3441 p = xdr_inline_decode(xdr, 4);
3442 if (unlikely(!p))
3443 return -EIO;
3444 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3445 *res = -be32_to_cpup(p);
3446 }
3447 return 0;
3448 }
3449
3450 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3451 uint32_t *bitmap, uint32_t *bitmask)
3452 {
3453 if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3454 int ret;
3455 ret = decode_attr_bitmap(xdr, bitmask);
3456 if (unlikely(ret < 0))
3457 return ret;
3458 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3459 } else
3460 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3461 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3462 bitmask[0], bitmask[1], bitmask[2]);
3463 return 0;
3464 }
3465
3466 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3467 {
3468 __be32 *p;
3469 u32 len;
3470
3471 if (fh != NULL)
3472 memset(fh, 0, sizeof(*fh));
3473
3474 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3475 return -EIO;
3476 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3477 p = xdr_inline_decode(xdr, 4);
3478 if (unlikely(!p))
3479 return -EIO;
3480 len = be32_to_cpup(p);
3481 if (len > NFS4_FHSIZE)
3482 return -EIO;
3483 p = xdr_inline_decode(xdr, len);
3484 if (unlikely(!p))
3485 return -EIO;
3486 if (fh != NULL) {
3487 memcpy(fh->data, p, len);
3488 fh->size = len;
3489 }
3490 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3491 }
3492 return 0;
3493 }
3494
3495 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3496 {
3497 __be32 *p;
3498
3499 *res = 0;
3500 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3501 return -EIO;
3502 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3503 p = xdr_inline_decode(xdr, 4);
3504 if (unlikely(!p))
3505 return -EIO;
3506 *res = be32_to_cpup(p);
3507 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3508 }
3509 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3510 return 0;
3511 }
3512
3513 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3514 {
3515 __be32 *p;
3516 int ret = 0;
3517
3518 *fileid = 0;
3519 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3520 return -EIO;
3521 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3522 p = xdr_inline_decode(xdr, 8);
3523 if (unlikely(!p))
3524 return -EIO;
3525 xdr_decode_hyper(p, fileid);
3526 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3527 ret = NFS_ATTR_FATTR_FILEID;
3528 }
3529 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3530 return ret;
3531 }
3532
3533 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3534 {
3535 __be32 *p;
3536 int ret = 0;
3537
3538 *fileid = 0;
3539 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3540 return -EIO;
3541 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3542 p = xdr_inline_decode(xdr, 8);
3543 if (unlikely(!p))
3544 return -EIO;
3545 xdr_decode_hyper(p, fileid);
3546 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3547 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3548 }
3549 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3550 return ret;
3551 }
3552
3553 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3554 {
3555 __be32 *p;
3556 int status = 0;
3557
3558 *res = 0;
3559 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3560 return -EIO;
3561 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3562 p = xdr_inline_decode(xdr, 8);
3563 if (unlikely(!p))
3564 return -EIO;
3565 xdr_decode_hyper(p, res);
3566 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3567 }
3568 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3569 return status;
3570 }
3571
3572 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3573 {
3574 __be32 *p;
3575 int status = 0;
3576
3577 *res = 0;
3578 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3579 return -EIO;
3580 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3581 p = xdr_inline_decode(xdr, 8);
3582 if (unlikely(!p))
3583 return -EIO;
3584 xdr_decode_hyper(p, res);
3585 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3586 }
3587 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3588 return status;
3589 }
3590
3591 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3592 {
3593 __be32 *p;
3594 int status = 0;
3595
3596 *res = 0;
3597 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3598 return -EIO;
3599 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3600 p = xdr_inline_decode(xdr, 8);
3601 if (unlikely(!p))
3602 return -EIO;
3603 xdr_decode_hyper(p, res);
3604 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3605 }
3606 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3607 return status;
3608 }
3609
3610 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3611 {
3612 u32 n;
3613 __be32 *p;
3614 int status = 0;
3615
3616 p = xdr_inline_decode(xdr, 4);
3617 if (unlikely(!p))
3618 return -EIO;
3619 n = be32_to_cpup(p);
3620 if (n == 0)
3621 goto root_path;
3622 dprintk("pathname4: ");
3623 if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3624 dprintk("cannot parse %d components in path\n", n);
3625 goto out_eio;
3626 }
3627 for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3628 struct nfs4_string *component = &path->components[path->ncomponents];
3629 status = decode_opaque_inline(xdr, &component->len, &component->data);
3630 if (unlikely(status != 0))
3631 goto out_eio;
3632 ifdebug (XDR)
3633 pr_cont("%s%.*s ",
3634 (path->ncomponents != n ? "/ " : ""),
3635 component->len, component->data);
3636 }
3637 out:
3638 return status;
3639 root_path:
3640 /* a root pathname is sent as a zero component4 */
3641 path->ncomponents = 1;
3642 path->components[0].len=0;
3643 path->components[0].data=NULL;
3644 dprintk("pathname4: /\n");
3645 goto out;
3646 out_eio:
3647 dprintk(" status %d", status);
3648 status = -EIO;
3649 goto out;
3650 }
3651
3652 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3653 {
3654 int n;
3655 __be32 *p;
3656 int status = -EIO;
3657
3658 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3659 goto out;
3660 status = 0;
3661 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3662 goto out;
3663 bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3664 status = -EIO;
3665 /* Ignore borken servers that return unrequested attrs */
3666 if (unlikely(res == NULL))
3667 goto out;
3668 dprintk("%s: fsroot:\n", __func__);
3669 status = decode_pathname(xdr, &res->fs_path);
3670 if (unlikely(status != 0))
3671 goto out;
3672 p = xdr_inline_decode(xdr, 4);
3673 if (unlikely(!p))
3674 goto out_eio;
3675 n = be32_to_cpup(p);
3676 if (n <= 0)
3677 goto out_eio;
3678 for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3679 u32 m;
3680 struct nfs4_fs_location *loc;
3681
3682 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3683 break;
3684 loc = &res->locations[res->nlocations];
3685 p = xdr_inline_decode(xdr, 4);
3686 if (unlikely(!p))
3687 goto out_eio;
3688 m = be32_to_cpup(p);
3689
3690 dprintk("%s: servers:\n", __func__);
3691 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3692 struct nfs4_string *server;
3693
3694 if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3695 unsigned int i;
3696 dprintk("%s: using first %u of %u servers "
3697 "returned for location %u\n",
3698 __func__,
3699 NFS4_FS_LOCATION_MAXSERVERS,
3700 m, res->nlocations);
3701 for (i = loc->nservers; i < m; i++) {
3702 unsigned int len;
3703 char *data;
3704 status = decode_opaque_inline(xdr, &len, &data);
3705 if (unlikely(status != 0))
3706 goto out_eio;
3707 }
3708 break;
3709 }
3710 server = &loc->servers[loc->nservers];
3711 status = decode_opaque_inline(xdr, &server->len, &server->data);
3712 if (unlikely(status != 0))
3713 goto out_eio;
3714 dprintk("%s ", server->data);
3715 }
3716 status = decode_pathname(xdr, &loc->rootpath);
3717 if (unlikely(status != 0))
3718 goto out_eio;
3719 }
3720 if (res->nlocations != 0)
3721 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3722 out:
3723 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3724 return status;
3725 out_eio:
3726 status = -EIO;
3727 goto out;
3728 }
3729
3730 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3731 {
3732 __be32 *p;
3733 int status = 0;
3734
3735 *res = 0;
3736 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3737 return -EIO;
3738 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3739 p = xdr_inline_decode(xdr, 8);
3740 if (unlikely(!p))
3741 return -EIO;
3742 xdr_decode_hyper(p, res);
3743 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3744 }
3745 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3746 return status;
3747 }
3748
3749 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3750 {
3751 __be32 *p;
3752 int status = 0;
3753
3754 *maxlink = 1;
3755 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3756 return -EIO;
3757 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3758 p = xdr_inline_decode(xdr, 4);
3759 if (unlikely(!p))
3760 return -EIO;
3761 *maxlink = be32_to_cpup(p);
3762 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3763 }
3764 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3765 return status;
3766 }
3767
3768 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3769 {
3770 __be32 *p;
3771 int status = 0;
3772
3773 *maxname = 1024;
3774 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3775 return -EIO;
3776 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3777 p = xdr_inline_decode(xdr, 4);
3778 if (unlikely(!p))
3779 return -EIO;
3780 *maxname = be32_to_cpup(p);
3781 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3782 }
3783 dprintk("%s: maxname=%u\n", __func__, *maxname);
3784 return status;
3785 }
3786
3787 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3788 {
3789 __be32 *p;
3790 int status = 0;
3791
3792 *res = 1024;
3793 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3794 return -EIO;
3795 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3796 uint64_t maxread;
3797 p = xdr_inline_decode(xdr, 8);
3798 if (unlikely(!p))
3799 return -EIO;
3800 xdr_decode_hyper(p, &maxread);
3801 if (maxread > 0x7FFFFFFF)
3802 maxread = 0x7FFFFFFF;
3803 *res = (uint32_t)maxread;
3804 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3805 }
3806 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3807 return status;
3808 }
3809
3810 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3811 {
3812 __be32 *p;
3813 int status = 0;
3814
3815 *res = 1024;
3816 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3817 return -EIO;
3818 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3819 uint64_t maxwrite;
3820 p = xdr_inline_decode(xdr, 8);
3821 if (unlikely(!p))
3822 return -EIO;
3823 xdr_decode_hyper(p, &maxwrite);
3824 if (maxwrite > 0x7FFFFFFF)
3825 maxwrite = 0x7FFFFFFF;
3826 *res = (uint32_t)maxwrite;
3827 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3828 }
3829 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3830 return status;
3831 }
3832
3833 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3834 {
3835 uint32_t tmp;
3836 __be32 *p;
3837 int ret = 0;
3838
3839 *mode = 0;
3840 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3841 return -EIO;
3842 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3843 p = xdr_inline_decode(xdr, 4);
3844 if (unlikely(!p))
3845 return -EIO;
3846 tmp = be32_to_cpup(p);
3847 *mode = tmp & ~S_IFMT;
3848 bitmap[1] &= ~FATTR4_WORD1_MODE;
3849 ret = NFS_ATTR_FATTR_MODE;
3850 }
3851 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3852 return ret;
3853 }
3854
3855 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3856 {
3857 __be32 *p;
3858 int ret = 0;
3859
3860 *nlink = 1;
3861 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3862 return -EIO;
3863 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3864 p = xdr_inline_decode(xdr, 4);
3865 if (unlikely(!p))
3866 return -EIO;
3867 *nlink = be32_to_cpup(p);
3868 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3869 ret = NFS_ATTR_FATTR_NLINK;
3870 }
3871 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3872 return ret;
3873 }
3874
3875 static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3876 struct nfs4_string *name, gfp_t gfp_flags)
3877 {
3878 ssize_t ret;
3879
3880 ret = xdr_stream_decode_string_dup(xdr, &name->data,
3881 XDR_MAX_NETOBJ, gfp_flags);
3882 name->len = 0;
3883 if (ret > 0)
3884 name->len = ret;
3885 return ret;
3886 }
3887
3888 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3889 const struct nfs_server *server, kuid_t *uid,
3890 struct nfs4_string *owner_name)
3891 {
3892 ssize_t len;
3893 char *p;
3894
3895 *uid = make_kuid(&init_user_ns, -2);
3896 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3897 return -EIO;
3898 if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3899 return 0;
3900 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3901
3902 if (owner_name != NULL) {
3903 len = decode_nfs4_string(xdr, owner_name, GFP_NOIO);
3904 if (len <= 0)
3905 goto out;
3906 dprintk("%s: name=%s\n", __func__, owner_name->data);
3907 return NFS_ATTR_FATTR_OWNER_NAME;
3908 } else {
3909 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3910 XDR_MAX_NETOBJ);
3911 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3912 goto out;
3913 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3914 return NFS_ATTR_FATTR_OWNER;
3915 }
3916 out:
3917 if (len == -EBADMSG)
3918 return -EIO;
3919 return 0;
3920 }
3921
3922 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3923 const struct nfs_server *server, kgid_t *gid,
3924 struct nfs4_string *group_name)
3925 {
3926 ssize_t len;
3927 char *p;
3928
3929 *gid = make_kgid(&init_user_ns, -2);
3930 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3931 return -EIO;
3932 if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
3933 return 0;
3934 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3935
3936 if (group_name != NULL) {
3937 len = decode_nfs4_string(xdr, group_name, GFP_NOIO);
3938 if (len <= 0)
3939 goto out;
3940 dprintk("%s: name=%s\n", __func__, group_name->data);
3941 return NFS_ATTR_FATTR_GROUP_NAME;
3942 } else {
3943 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3944 XDR_MAX_NETOBJ);
3945 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
3946 goto out;
3947 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3948 return NFS_ATTR_FATTR_GROUP;
3949 }
3950 out:
3951 if (len == -EBADMSG)
3952 return -EIO;
3953 return 0;
3954 }
3955
3956 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3957 {
3958 uint32_t major = 0, minor = 0;
3959 __be32 *p;
3960 int ret = 0;
3961
3962 *rdev = MKDEV(0,0);
3963 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3964 return -EIO;
3965 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3966 dev_t tmp;
3967
3968 p = xdr_inline_decode(xdr, 8);
3969 if (unlikely(!p))
3970 return -EIO;
3971 major = be32_to_cpup(p++);
3972 minor = be32_to_cpup(p);
3973 tmp = MKDEV(major, minor);
3974 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3975 *rdev = tmp;
3976 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3977 ret = NFS_ATTR_FATTR_RDEV;
3978 }
3979 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3980 return ret;
3981 }
3982
3983 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3984 {
3985 __be32 *p;
3986 int status = 0;
3987
3988 *res = 0;
3989 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3990 return -EIO;
3991 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3992 p = xdr_inline_decode(xdr, 8);
3993 if (unlikely(!p))
3994 return -EIO;
3995 xdr_decode_hyper(p, res);
3996 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3997 }
3998 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3999 return status;
4000 }
4001
4002 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4003 {
4004 __be32 *p;
4005 int status = 0;
4006
4007 *res = 0;
4008 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4009 return -EIO;
4010 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4011 p = xdr_inline_decode(xdr, 8);
4012 if (unlikely(!p))
4013 return -EIO;
4014 xdr_decode_hyper(p, res);
4015 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4016 }
4017 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4018 return status;
4019 }
4020
4021 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4022 {
4023 __be32 *p;
4024 int status = 0;
4025
4026 *res = 0;
4027 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4028 return -EIO;
4029 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4030 p = xdr_inline_decode(xdr, 8);
4031 if (unlikely(!p))
4032 return -EIO;
4033 xdr_decode_hyper(p, res);
4034 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4035 }
4036 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4037 return status;
4038 }
4039
4040 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4041 {
4042 __be32 *p;
4043 int ret = 0;
4044
4045 *used = 0;
4046 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4047 return -EIO;
4048 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4049 p = xdr_inline_decode(xdr, 8);
4050 if (unlikely(!p))
4051 return -EIO;
4052 xdr_decode_hyper(p, used);
4053 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4054 ret = NFS_ATTR_FATTR_SPACE_USED;
4055 }
4056 dprintk("%s: space used=%Lu\n", __func__,
4057 (unsigned long long)*used);
4058 return ret;
4059 }
4060
4061 static __be32 *
4062 xdr_decode_nfstime4(__be32 *p, struct timespec *t)
4063 {
4064 __u64 sec;
4065
4066 p = xdr_decode_hyper(p, &sec);
4067 t-> tv_sec = (time_t)sec;
4068 t->tv_nsec = be32_to_cpup(p++);
4069 return p;
4070 }
4071
4072 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4073 {
4074 __be32 *p;
4075
4076 p = xdr_inline_decode(xdr, nfstime4_maxsz << 2);
4077 if (unlikely(!p))
4078 return -EIO;
4079 xdr_decode_nfstime4(p, time);
4080 return 0;
4081 }
4082
4083 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4084 {
4085 int status = 0;
4086
4087 time->tv_sec = 0;
4088 time->tv_nsec = 0;
4089 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4090 return -EIO;
4091 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4092 status = decode_attr_time(xdr, time);
4093 if (status == 0)
4094 status = NFS_ATTR_FATTR_ATIME;
4095 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4096 }
4097 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4098 return status;
4099 }
4100
4101 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4102 {
4103 int status = 0;
4104
4105 time->tv_sec = 0;
4106 time->tv_nsec = 0;
4107 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4108 return -EIO;
4109 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4110 status = decode_attr_time(xdr, time);
4111 if (status == 0)
4112 status = NFS_ATTR_FATTR_CTIME;
4113 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4114 }
4115 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4116 return status;
4117 }
4118
4119 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4120 struct timespec *time)
4121 {
4122 int status = 0;
4123
4124 time->tv_sec = 0;
4125 time->tv_nsec = 0;
4126 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4127 return -EIO;
4128 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4129 status = decode_attr_time(xdr, time);
4130 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4131 }
4132 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4133 (long)time->tv_nsec);
4134 return status;
4135 }
4136
4137 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4138 struct nfs4_label *label)
4139 {
4140 uint32_t pi = 0;
4141 uint32_t lfs = 0;
4142 __u32 len;
4143 __be32 *p;
4144 int status = 0;
4145
4146 if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4147 return -EIO;
4148 if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4149 p = xdr_inline_decode(xdr, 4);
4150 if (unlikely(!p))
4151 return -EIO;
4152 lfs = be32_to_cpup(p++);
4153 p = xdr_inline_decode(xdr, 4);
4154 if (unlikely(!p))
4155 return -EIO;
4156 pi = be32_to_cpup(p++);
4157 p = xdr_inline_decode(xdr, 4);
4158 if (unlikely(!p))
4159 return -EIO;
4160 len = be32_to_cpup(p++);
4161 p = xdr_inline_decode(xdr, len);
4162 if (unlikely(!p))
4163 return -EIO;
4164 if (len < NFS4_MAXLABELLEN) {
4165 if (label) {
4166 memcpy(label->label, p, len);
4167 label->len = len;
4168 label->pi = pi;
4169 label->lfs = lfs;
4170 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4171 }
4172 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4173 } else
4174 printk(KERN_WARNING "%s: label too long (%u)!\n",
4175 __func__, len);
4176 }
4177 if (label && label->label)
4178 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4179 (char *)label->label, label->len, label->pi, label->lfs);
4180 return status;
4181 }
4182
4183 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4184 {
4185 int status = 0;
4186
4187 time->tv_sec = 0;
4188 time->tv_nsec = 0;
4189 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4190 return -EIO;
4191 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4192 status = decode_attr_time(xdr, time);
4193 if (status == 0)
4194 status = NFS_ATTR_FATTR_MTIME;
4195 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4196 }
4197 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4198 return status;
4199 }
4200
4201 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4202 {
4203 unsigned int attrwords = XDR_QUADLEN(attrlen);
4204 unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4205
4206 if (unlikely(attrwords != nwords)) {
4207 dprintk("%s: server returned incorrect attribute length: "
4208 "%u %c %u\n",
4209 __func__,
4210 attrwords << 2,
4211 (attrwords < nwords) ? '<' : '>',
4212 nwords << 2);
4213 return -EIO;
4214 }
4215 return 0;
4216 }
4217
4218 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4219 {
4220 __be32 *p;
4221
4222 p = xdr_inline_decode(xdr, 20);
4223 if (unlikely(!p))
4224 return -EIO;
4225 cinfo->atomic = be32_to_cpup(p++);
4226 p = xdr_decode_hyper(p, &cinfo->before);
4227 xdr_decode_hyper(p, &cinfo->after);
4228 return 0;
4229 }
4230
4231 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4232 {
4233 __be32 *p;
4234 uint32_t supp, acc;
4235 int status;
4236
4237 status = decode_op_hdr(xdr, OP_ACCESS);
4238 if (status)
4239 return status;
4240 p = xdr_inline_decode(xdr, 8);
4241 if (unlikely(!p))
4242 return -EIO;
4243 supp = be32_to_cpup(p++);
4244 acc = be32_to_cpup(p);
4245 *supported = supp;
4246 *access = acc;
4247 return 0;
4248 }
4249
4250 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4251 {
4252 ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4253 if (unlikely(ret < 0))
4254 return -EIO;
4255 return 0;
4256 }
4257
4258 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4259 {
4260 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4261 }
4262
4263 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4264 {
4265 stateid->type = NFS4_OPEN_STATEID_TYPE;
4266 return decode_stateid(xdr, stateid);
4267 }
4268
4269 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4270 {
4271 stateid->type = NFS4_LOCK_STATEID_TYPE;
4272 return decode_stateid(xdr, stateid);
4273 }
4274
4275 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4276 {
4277 stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4278 return decode_stateid(xdr, stateid);
4279 }
4280
4281 static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4282 {
4283 nfs4_stateid dummy;
4284
4285 nfs4_stateid_copy(stateid, &invalid_stateid);
4286 return decode_stateid(xdr, &dummy);
4287 }
4288
4289 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4290 {
4291 int status;
4292
4293 status = decode_op_hdr(xdr, OP_CLOSE);
4294 if (status != -EIO)
4295 nfs_increment_open_seqid(status, res->seqid);
4296 if (!status)
4297 status = decode_invalid_stateid(xdr, &res->stateid);
4298 return status;
4299 }
4300
4301 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4302 {
4303 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4304 }
4305
4306 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4307 {
4308 return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4309 }
4310
4311 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4312 {
4313 int status;
4314
4315 status = decode_op_hdr(xdr, OP_COMMIT);
4316 if (!status)
4317 status = decode_write_verifier(xdr, &res->verf->verifier);
4318 return status;
4319 }
4320
4321 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4322 {
4323 __be32 *p;
4324 uint32_t bmlen;
4325 int status;
4326
4327 status = decode_op_hdr(xdr, OP_CREATE);
4328 if (status)
4329 return status;
4330 if ((status = decode_change_info(xdr, cinfo)))
4331 return status;
4332 p = xdr_inline_decode(xdr, 4);
4333 if (unlikely(!p))
4334 return -EIO;
4335 bmlen = be32_to_cpup(p);
4336 p = xdr_inline_decode(xdr, bmlen << 2);
4337 if (likely(p))
4338 return 0;
4339 return -EIO;
4340 }
4341
4342 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4343 {
4344 unsigned int savep;
4345 uint32_t attrlen, bitmap[3] = {0};
4346 int status;
4347
4348 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4349 goto xdr_error;
4350 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4351 goto xdr_error;
4352 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4353 goto xdr_error;
4354 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4355 goto xdr_error;
4356 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4357 &res->fh_expire_type)) != 0)
4358 goto xdr_error;
4359 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4360 goto xdr_error;
4361 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4362 goto xdr_error;
4363 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4364 goto xdr_error;
4365 if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4366 res->exclcreat_bitmask)) != 0)
4367 goto xdr_error;
4368 status = verify_attr_len(xdr, savep, attrlen);
4369 xdr_error:
4370 dprintk("%s: xdr returned %d!\n", __func__, -status);
4371 return status;
4372 }
4373
4374 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4375 {
4376 unsigned int savep;
4377 uint32_t attrlen, bitmap[3] = {0};
4378 int status;
4379
4380 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4381 goto xdr_error;
4382 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4383 goto xdr_error;
4384 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4385 goto xdr_error;
4386
4387 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4388 goto xdr_error;
4389 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4390 goto xdr_error;
4391 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4392 goto xdr_error;
4393
4394 status = -EIO;
4395 if (unlikely(bitmap[0]))
4396 goto xdr_error;
4397
4398 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4399 goto xdr_error;
4400 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4401 goto xdr_error;
4402 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4403 goto xdr_error;
4404
4405 status = verify_attr_len(xdr, savep, attrlen);
4406 xdr_error:
4407 dprintk("%s: xdr returned %d!\n", __func__, -status);
4408 return status;
4409 }
4410
4411 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4412 {
4413 unsigned int savep;
4414 uint32_t attrlen, bitmap[3] = {0};
4415 int status;
4416
4417 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4418 goto xdr_error;
4419 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4420 goto xdr_error;
4421 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4422 goto xdr_error;
4423
4424 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4425 goto xdr_error;
4426 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4427 goto xdr_error;
4428
4429 status = verify_attr_len(xdr, savep, attrlen);
4430 xdr_error:
4431 dprintk("%s: xdr returned %d!\n", __func__, -status);
4432 return status;
4433 }
4434
4435 static int decode_threshold_hint(struct xdr_stream *xdr,
4436 uint32_t *bitmap,
4437 uint64_t *res,
4438 uint32_t hint_bit)
4439 {
4440 __be32 *p;
4441
4442 *res = 0;
4443 if (likely(bitmap[0] & hint_bit)) {
4444 p = xdr_inline_decode(xdr, 8);
4445 if (unlikely(!p))
4446 return -EIO;
4447 xdr_decode_hyper(p, res);
4448 }
4449 return 0;
4450 }
4451
4452 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4453 struct nfs4_threshold *res)
4454 {
4455 __be32 *p;
4456 unsigned int savep;
4457 uint32_t bitmap[3] = {0,}, attrlen;
4458 int status;
4459
4460 /* layout type */
4461 p = xdr_inline_decode(xdr, 4);
4462 if (unlikely(!p))
4463 return -EIO;
4464 res->l_type = be32_to_cpup(p);
4465
4466 /* thi_hintset bitmap */
4467 status = decode_attr_bitmap(xdr, bitmap);
4468 if (status < 0)
4469 goto xdr_error;
4470
4471 /* thi_hintlist length */
4472 status = decode_attr_length(xdr, &attrlen, &savep);
4473 if (status < 0)
4474 goto xdr_error;
4475 /* thi_hintlist */
4476 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4477 if (status < 0)
4478 goto xdr_error;
4479 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4480 if (status < 0)
4481 goto xdr_error;
4482 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4483 THRESHOLD_RD_IO);
4484 if (status < 0)
4485 goto xdr_error;
4486 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4487 THRESHOLD_WR_IO);
4488 if (status < 0)
4489 goto xdr_error;
4490
4491 status = verify_attr_len(xdr, savep, attrlen);
4492 res->bm = bitmap[0];
4493
4494 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4495 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4496 res->wr_io_sz);
4497 xdr_error:
4498 dprintk("%s ret=%d!\n", __func__, status);
4499 return status;
4500 }
4501
4502 /*
4503 * Thresholds on pNFS direct I/O vrs MDS I/O
4504 */
4505 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4506 uint32_t *bitmap,
4507 struct nfs4_threshold *res)
4508 {
4509 __be32 *p;
4510 int status = 0;
4511 uint32_t num;
4512
4513 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4514 return -EIO;
4515 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4516 /* Did the server return an unrequested attribute? */
4517 if (unlikely(res == NULL))
4518 return -EREMOTEIO;
4519 p = xdr_inline_decode(xdr, 4);
4520 if (unlikely(!p))
4521 return -EIO;
4522 num = be32_to_cpup(p);
4523 if (num == 0)
4524 return 0;
4525 if (num > 1)
4526 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4527 "drivers per filesystem not supported\n",
4528 __func__);
4529
4530 status = decode_first_threshold_item4(xdr, res);
4531 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4532 }
4533 return status;
4534 }
4535
4536 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4537 struct nfs_fattr *fattr, struct nfs_fh *fh,
4538 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4539 const struct nfs_server *server)
4540 {
4541 int status;
4542 umode_t fmode = 0;
4543 uint32_t type;
4544 int32_t err;
4545
4546 status = decode_attr_type(xdr, bitmap, &type);
4547 if (status < 0)
4548 goto xdr_error;
4549 fattr->mode = 0;
4550 if (status != 0) {
4551 fattr->mode |= nfs_type2fmt[type];
4552 fattr->valid |= status;
4553 }
4554
4555 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4556 if (status < 0)
4557 goto xdr_error;
4558 fattr->valid |= status;
4559
4560 status = decode_attr_size(xdr, bitmap, &fattr->size);
4561 if (status < 0)
4562 goto xdr_error;
4563 fattr->valid |= status;
4564
4565 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4566 if (status < 0)
4567 goto xdr_error;
4568 fattr->valid |= status;
4569
4570 err = 0;
4571 status = decode_attr_error(xdr, bitmap, &err);
4572 if (status < 0)
4573 goto xdr_error;
4574
4575 status = decode_attr_filehandle(xdr, bitmap, fh);
4576 if (status < 0)
4577 goto xdr_error;
4578
4579 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4580 if (status < 0)
4581 goto xdr_error;
4582 fattr->valid |= status;
4583
4584 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4585 if (status < 0)
4586 goto xdr_error;
4587 fattr->valid |= status;
4588
4589 status = -EIO;
4590 if (unlikely(bitmap[0]))
4591 goto xdr_error;
4592
4593 status = decode_attr_mode(xdr, bitmap, &fmode);
4594 if (status < 0)
4595 goto xdr_error;
4596 if (status != 0) {
4597 fattr->mode |= fmode;
4598 fattr->valid |= status;
4599 }
4600
4601 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4602 if (status < 0)
4603 goto xdr_error;
4604 fattr->valid |= status;
4605
4606 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4607 if (status < 0)
4608 goto xdr_error;
4609 fattr->valid |= status;
4610
4611 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4612 if (status < 0)
4613 goto xdr_error;
4614 fattr->valid |= status;
4615
4616 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4617 if (status < 0)
4618 goto xdr_error;
4619 fattr->valid |= status;
4620
4621 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4622 if (status < 0)
4623 goto xdr_error;
4624 fattr->valid |= status;
4625
4626 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4627 if (status < 0)
4628 goto xdr_error;
4629 fattr->valid |= status;
4630
4631 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4632 if (status < 0)
4633 goto xdr_error;
4634 fattr->valid |= status;
4635
4636 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4637 if (status < 0)
4638 goto xdr_error;
4639 fattr->valid |= status;
4640
4641 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4642 if (status < 0)
4643 goto xdr_error;
4644 fattr->valid |= status;
4645
4646 status = -EIO;
4647 if (unlikely(bitmap[1]))
4648 goto xdr_error;
4649
4650 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4651 if (status < 0)
4652 goto xdr_error;
4653
4654 if (label) {
4655 status = decode_attr_security_label(xdr, bitmap, label);
4656 if (status < 0)
4657 goto xdr_error;
4658 fattr->valid |= status;
4659 }
4660
4661 xdr_error:
4662 dprintk("%s: xdr returned %d\n", __func__, -status);
4663 return status;
4664 }
4665
4666 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4667 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4668 struct nfs4_label *label, const struct nfs_server *server)
4669 {
4670 unsigned int savep;
4671 uint32_t attrlen,
4672 bitmap[3] = {0};
4673 int status;
4674
4675 status = decode_op_hdr(xdr, OP_GETATTR);
4676 if (status < 0)
4677 goto xdr_error;
4678
4679 status = decode_attr_bitmap(xdr, bitmap);
4680 if (status < 0)
4681 goto xdr_error;
4682
4683 status = decode_attr_length(xdr, &attrlen, &savep);
4684 if (status < 0)
4685 goto xdr_error;
4686
4687 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4688 label, server);
4689 if (status < 0)
4690 goto xdr_error;
4691
4692 status = verify_attr_len(xdr, savep, attrlen);
4693 xdr_error:
4694 dprintk("%s: xdr returned %d\n", __func__, -status);
4695 return status;
4696 }
4697
4698 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4699 struct nfs4_label *label, const struct nfs_server *server)
4700 {
4701 return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4702 }
4703
4704 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4705 const struct nfs_server *server)
4706 {
4707 return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4708 }
4709
4710 /*
4711 * Decode potentially multiple layout types.
4712 */
4713 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4714 struct nfs_fsinfo *fsinfo)
4715 {
4716 __be32 *p;
4717 uint32_t i;
4718
4719 p = xdr_inline_decode(xdr, 4);
4720 if (unlikely(!p))
4721 return -EIO;
4722 fsinfo->nlayouttypes = be32_to_cpup(p);
4723
4724 /* pNFS is not supported by the underlying file system */
4725 if (fsinfo->nlayouttypes == 0)
4726 return 0;
4727
4728 /* Decode and set first layout type, move xdr->p past unused types */
4729 p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4730 if (unlikely(!p))
4731 return -EIO;
4732
4733 /* If we get too many, then just cap it at the max */
4734 if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4735 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4736 __func__, fsinfo->nlayouttypes);
4737 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4738 }
4739
4740 for(i = 0; i < fsinfo->nlayouttypes; ++i)
4741 fsinfo->layouttype[i] = be32_to_cpup(p++);
4742 return 0;
4743 }
4744
4745 /*
4746 * The type of file system exported.
4747 * Note we must ensure that layouttype is set in any non-error case.
4748 */
4749 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4750 struct nfs_fsinfo *fsinfo)
4751 {
4752 int status = 0;
4753
4754 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4755 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4756 return -EIO;
4757 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4758 status = decode_pnfs_layout_types(xdr, fsinfo);
4759 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4760 }
4761 return status;
4762 }
4763
4764 /*
4765 * The prefered block size for layout directed io
4766 */
4767 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4768 uint32_t *res)
4769 {
4770 __be32 *p;
4771
4772 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4773 *res = 0;
4774 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4775 p = xdr_inline_decode(xdr, 4);
4776 if (unlikely(!p))
4777 return -EIO;
4778 *res = be32_to_cpup(p);
4779 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4780 }
4781 return 0;
4782 }
4783
4784 /*
4785 * The granularity of a CLONE operation.
4786 */
4787 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4788 uint32_t *res)
4789 {
4790 __be32 *p;
4791
4792 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4793 *res = 0;
4794 if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4795 p = xdr_inline_decode(xdr, 4);
4796 if (unlikely(!p))
4797 return -EIO;
4798 *res = be32_to_cpup(p);
4799 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4800 }
4801 return 0;
4802 }
4803
4804 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4805 {
4806 unsigned int savep;
4807 uint32_t attrlen, bitmap[3];
4808 int status;
4809
4810 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4811 goto xdr_error;
4812 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4813 goto xdr_error;
4814 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4815 goto xdr_error;
4816
4817 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4818
4819 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4820 goto xdr_error;
4821 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4822 goto xdr_error;
4823 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4824 goto xdr_error;
4825 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4826 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4827 goto xdr_error;
4828 fsinfo->wtpref = fsinfo->wtmax;
4829
4830 status = -EIO;
4831 if (unlikely(bitmap[0]))
4832 goto xdr_error;
4833
4834 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4835 if (status != 0)
4836 goto xdr_error;
4837 status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4838 if (status != 0)
4839 goto xdr_error;
4840
4841 status = -EIO;
4842 if (unlikely(bitmap[1]))
4843 goto xdr_error;
4844
4845 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4846 if (status)
4847 goto xdr_error;
4848 status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4849 if (status)
4850 goto xdr_error;
4851
4852 status = verify_attr_len(xdr, savep, attrlen);
4853 xdr_error:
4854 dprintk("%s: xdr returned %d!\n", __func__, -status);
4855 return status;
4856 }
4857
4858 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4859 {
4860 __be32 *p;
4861 uint32_t len;
4862 int status;
4863
4864 /* Zero handle first to allow comparisons */
4865 memset(fh, 0, sizeof(*fh));
4866
4867 status = decode_op_hdr(xdr, OP_GETFH);
4868 if (status)
4869 return status;
4870
4871 p = xdr_inline_decode(xdr, 4);
4872 if (unlikely(!p))
4873 return -EIO;
4874 len = be32_to_cpup(p);
4875 if (len > NFS4_FHSIZE)
4876 return -EIO;
4877 fh->size = len;
4878 p = xdr_inline_decode(xdr, len);
4879 if (unlikely(!p))
4880 return -EIO;
4881 memcpy(fh->data, p, len);
4882 return 0;
4883 }
4884
4885 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4886 {
4887 int status;
4888
4889 status = decode_op_hdr(xdr, OP_LINK);
4890 if (status)
4891 return status;
4892 return decode_change_info(xdr, cinfo);
4893 }
4894
4895 /*
4896 * We create the owner, so we know a proper owner.id length is 4.
4897 */
4898 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4899 {
4900 uint64_t offset, length, clientid;
4901 __be32 *p;
4902 uint32_t namelen, type;
4903
4904 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4905 if (unlikely(!p))
4906 return -EIO;
4907 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4908 p = xdr_decode_hyper(p, &length);
4909 type = be32_to_cpup(p++); /* 4 byte read */
4910 if (fl != NULL) { /* manipulate file lock */
4911 fl->fl_start = (loff_t)offset;
4912 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4913 if (length == ~(uint64_t)0)
4914 fl->fl_end = OFFSET_MAX;
4915 fl->fl_type = F_WRLCK;
4916 if (type & 1)
4917 fl->fl_type = F_RDLCK;
4918 fl->fl_pid = 0;
4919 }
4920 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4921 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4922 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4923 if (likely(!p))
4924 return -EIO;
4925 return -NFS4ERR_DENIED;
4926 }
4927
4928 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4929 {
4930 int status;
4931
4932 status = decode_op_hdr(xdr, OP_LOCK);
4933 if (status == -EIO)
4934 goto out;
4935 if (status == 0) {
4936 status = decode_lock_stateid(xdr, &res->stateid);
4937 if (unlikely(status))
4938 goto out;
4939 } else if (status == -NFS4ERR_DENIED)
4940 status = decode_lock_denied(xdr, NULL);
4941 if (res->open_seqid != NULL)
4942 nfs_increment_open_seqid(status, res->open_seqid);
4943 nfs_increment_lock_seqid(status, res->lock_seqid);
4944 out:
4945 return status;
4946 }
4947
4948 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4949 {
4950 int status;
4951 status = decode_op_hdr(xdr, OP_LOCKT);
4952 if (status == -NFS4ERR_DENIED)
4953 return decode_lock_denied(xdr, res->denied);
4954 return status;
4955 }
4956
4957 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4958 {
4959 int status;
4960
4961 status = decode_op_hdr(xdr, OP_LOCKU);
4962 if (status != -EIO)
4963 nfs_increment_lock_seqid(status, res->seqid);
4964 if (status == 0)
4965 status = decode_lock_stateid(xdr, &res->stateid);
4966 return status;
4967 }
4968
4969 static int decode_release_lockowner(struct xdr_stream *xdr)
4970 {
4971 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4972 }
4973
4974 static int decode_lookup(struct xdr_stream *xdr)
4975 {
4976 return decode_op_hdr(xdr, OP_LOOKUP);
4977 }
4978
4979 static int decode_lookupp(struct xdr_stream *xdr)
4980 {
4981 return decode_op_hdr(xdr, OP_LOOKUPP);
4982 }
4983
4984 /* This is too sick! */
4985 static int decode_space_limit(struct xdr_stream *xdr,
4986 unsigned long *pagemod_limit)
4987 {
4988 __be32 *p;
4989 uint32_t limit_type, nblocks, blocksize;
4990 u64 maxsize = 0;
4991
4992 p = xdr_inline_decode(xdr, 12);
4993 if (unlikely(!p))
4994 return -EIO;
4995 limit_type = be32_to_cpup(p++);
4996 switch (limit_type) {
4997 case NFS4_LIMIT_SIZE:
4998 xdr_decode_hyper(p, &maxsize);
4999 break;
5000 case NFS4_LIMIT_BLOCKS:
5001 nblocks = be32_to_cpup(p++);
5002 blocksize = be32_to_cpup(p);
5003 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5004 }
5005 maxsize >>= PAGE_SHIFT;
5006 *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5007 return 0;
5008 }
5009
5010 static int decode_rw_delegation(struct xdr_stream *xdr,
5011 uint32_t delegation_type,
5012 struct nfs_openres *res)
5013 {
5014 __be32 *p;
5015 int status;
5016
5017 status = decode_delegation_stateid(xdr, &res->delegation);
5018 if (unlikely(status))
5019 return status;
5020 p = xdr_inline_decode(xdr, 4);
5021 if (unlikely(!p))
5022 return -EIO;
5023 res->do_recall = be32_to_cpup(p);
5024
5025 switch (delegation_type) {
5026 case NFS4_OPEN_DELEGATE_READ:
5027 res->delegation_type = FMODE_READ;
5028 break;
5029 case NFS4_OPEN_DELEGATE_WRITE:
5030 res->delegation_type = FMODE_WRITE|FMODE_READ;
5031 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5032 return -EIO;
5033 }
5034 return decode_ace(xdr, NULL);
5035 }
5036
5037 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5038 {
5039 __be32 *p;
5040 uint32_t why_no_delegation;
5041
5042 p = xdr_inline_decode(xdr, 4);
5043 if (unlikely(!p))
5044 return -EIO;
5045 why_no_delegation = be32_to_cpup(p);
5046 switch (why_no_delegation) {
5047 case WND4_CONTENTION:
5048 case WND4_RESOURCE:
5049 xdr_inline_decode(xdr, 4);
5050 /* Ignore for now */
5051 }
5052 return 0;
5053 }
5054
5055 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5056 {
5057 __be32 *p;
5058 uint32_t delegation_type;
5059
5060 p = xdr_inline_decode(xdr, 4);
5061 if (unlikely(!p))
5062 return -EIO;
5063 delegation_type = be32_to_cpup(p);
5064 res->delegation_type = 0;
5065 switch (delegation_type) {
5066 case NFS4_OPEN_DELEGATE_NONE:
5067 return 0;
5068 case NFS4_OPEN_DELEGATE_READ:
5069 case NFS4_OPEN_DELEGATE_WRITE:
5070 return decode_rw_delegation(xdr, delegation_type, res);
5071 case NFS4_OPEN_DELEGATE_NONE_EXT:
5072 return decode_no_delegation(xdr, res);
5073 }
5074 return -EIO;
5075 }
5076
5077 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5078 {
5079 __be32 *p;
5080 uint32_t savewords, bmlen, i;
5081 int status;
5082
5083 if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5084 return status;
5085 nfs_increment_open_seqid(status, res->seqid);
5086 if (status)
5087 return status;
5088 status = decode_open_stateid(xdr, &res->stateid);
5089 if (unlikely(status))
5090 return status;
5091
5092 decode_change_info(xdr, &res->cinfo);
5093
5094 p = xdr_inline_decode(xdr, 8);
5095 if (unlikely(!p))
5096 return -EIO;
5097 res->rflags = be32_to_cpup(p++);
5098 bmlen = be32_to_cpup(p);
5099 if (bmlen > 10)
5100 goto xdr_error;
5101
5102 p = xdr_inline_decode(xdr, bmlen << 2);
5103 if (unlikely(!p))
5104 return -EIO;
5105 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5106 for (i = 0; i < savewords; ++i)
5107 res->attrset[i] = be32_to_cpup(p++);
5108 for (; i < NFS4_BITMAP_SIZE; i++)
5109 res->attrset[i] = 0;
5110
5111 return decode_delegation(xdr, res);
5112 xdr_error:
5113 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5114 return -EIO;
5115 }
5116
5117 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5118 {
5119 int status;
5120
5121 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5122 if (status != -EIO)
5123 nfs_increment_open_seqid(status, res->seqid);
5124 if (!status)
5125 status = decode_open_stateid(xdr, &res->stateid);
5126 return status;
5127 }
5128
5129 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5130 {
5131 int status;
5132
5133 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5134 if (status != -EIO)
5135 nfs_increment_open_seqid(status, res->seqid);
5136 if (!status)
5137 status = decode_open_stateid(xdr, &res->stateid);
5138 return status;
5139 }
5140
5141 static int decode_putfh(struct xdr_stream *xdr)
5142 {
5143 return decode_op_hdr(xdr, OP_PUTFH);
5144 }
5145
5146 static int decode_putrootfh(struct xdr_stream *xdr)
5147 {
5148 return decode_op_hdr(xdr, OP_PUTROOTFH);
5149 }
5150
5151 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5152 struct nfs_pgio_res *res)
5153 {
5154 __be32 *p;
5155 uint32_t count, eof, recvd;
5156 int status;
5157
5158 status = decode_op_hdr(xdr, OP_READ);
5159 if (status)
5160 return status;
5161 p = xdr_inline_decode(xdr, 8);
5162 if (unlikely(!p))
5163 return -EIO;
5164 eof = be32_to_cpup(p++);
5165 count = be32_to_cpup(p);
5166 recvd = xdr_read_pages(xdr, count);
5167 if (count > recvd) {
5168 dprintk("NFS: server cheating in read reply: "
5169 "count %u > recvd %u\n", count, recvd);
5170 count = recvd;
5171 eof = 0;
5172 }
5173 res->eof = eof;
5174 res->count = count;
5175 return 0;
5176 }
5177
5178 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5179 {
5180 int status;
5181 __be32 verf[2];
5182
5183 status = decode_op_hdr(xdr, OP_READDIR);
5184 if (!status)
5185 status = decode_verifier(xdr, readdir->verifier.data);
5186 if (unlikely(status))
5187 return status;
5188 memcpy(verf, readdir->verifier.data, sizeof(verf));
5189 dprintk("%s: verifier = %08x:%08x\n",
5190 __func__, verf[0], verf[1]);
5191 return xdr_read_pages(xdr, xdr->buf->page_len);
5192 }
5193
5194 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5195 {
5196 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5197 u32 len, recvd;
5198 __be32 *p;
5199 int status;
5200
5201 status = decode_op_hdr(xdr, OP_READLINK);
5202 if (status)
5203 return status;
5204
5205 /* Convert length of symlink */
5206 p = xdr_inline_decode(xdr, 4);
5207 if (unlikely(!p))
5208 return -EIO;
5209 len = be32_to_cpup(p);
5210 if (len >= rcvbuf->page_len || len <= 0) {
5211 dprintk("nfs: server returned giant symlink!\n");
5212 return -ENAMETOOLONG;
5213 }
5214 recvd = xdr_read_pages(xdr, len);
5215 if (recvd < len) {
5216 dprintk("NFS: server cheating in readlink reply: "
5217 "count %u > recvd %u\n", len, recvd);
5218 return -EIO;
5219 }
5220 /*
5221 * The XDR encode routine has set things up so that
5222 * the link text will be copied directly into the
5223 * buffer. We just have to do overflow-checking,
5224 * and and null-terminate the text (the VFS expects
5225 * null-termination).
5226 */
5227 xdr_terminate_string(rcvbuf, len);
5228 return 0;
5229 }
5230
5231 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5232 {
5233 int status;
5234
5235 status = decode_op_hdr(xdr, OP_REMOVE);
5236 if (status)
5237 goto out;
5238 status = decode_change_info(xdr, cinfo);
5239 out:
5240 return status;
5241 }
5242
5243 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5244 struct nfs4_change_info *new_cinfo)
5245 {
5246 int status;
5247
5248 status = decode_op_hdr(xdr, OP_RENAME);
5249 if (status)
5250 goto out;
5251 if ((status = decode_change_info(xdr, old_cinfo)))
5252 goto out;
5253 status = decode_change_info(xdr, new_cinfo);
5254 out:
5255 return status;
5256 }
5257
5258 static int decode_renew(struct xdr_stream *xdr)
5259 {
5260 return decode_op_hdr(xdr, OP_RENEW);
5261 }
5262
5263 static int
5264 decode_restorefh(struct xdr_stream *xdr)
5265 {
5266 return decode_op_hdr(xdr, OP_RESTOREFH);
5267 }
5268
5269 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5270 struct nfs_getaclres *res)
5271 {
5272 unsigned int savep;
5273 uint32_t attrlen,
5274 bitmap[3] = {0};
5275 int status;
5276 unsigned int pg_offset;
5277
5278 res->acl_len = 0;
5279 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5280 goto out;
5281
5282 xdr_enter_page(xdr, xdr->buf->page_len);
5283
5284 /* Calculate the offset of the page data */
5285 pg_offset = xdr->buf->head[0].iov_len;
5286
5287 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5288 goto out;
5289 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5290 goto out;
5291
5292 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5293 return -EIO;
5294 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5295
5296 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5297 * are stored with the acl data to handle the problem of
5298 * variable length bitmaps.*/
5299 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5300 res->acl_len = attrlen;
5301
5302 /* Check for receive buffer overflow */
5303 if (res->acl_len > (xdr->nwords << 2) ||
5304 res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5305 res->acl_flags |= NFS4_ACL_TRUNC;
5306 dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5307 attrlen, xdr->nwords << 2);
5308 }
5309 } else
5310 status = -EOPNOTSUPP;
5311
5312 out:
5313 return status;
5314 }
5315
5316 static int
5317 decode_savefh(struct xdr_stream *xdr)
5318 {
5319 return decode_op_hdr(xdr, OP_SAVEFH);
5320 }
5321
5322 static int decode_setattr(struct xdr_stream *xdr)
5323 {
5324 int status;
5325
5326 status = decode_op_hdr(xdr, OP_SETATTR);
5327 if (status)
5328 return status;
5329 if (decode_bitmap4(xdr, NULL, 0) >= 0)
5330 return 0;
5331 return -EIO;
5332 }
5333
5334 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5335 {
5336 __be32 *p;
5337 uint32_t opnum;
5338 int32_t nfserr;
5339
5340 p = xdr_inline_decode(xdr, 8);
5341 if (unlikely(!p))
5342 return -EIO;
5343 opnum = be32_to_cpup(p++);
5344 if (opnum != OP_SETCLIENTID) {
5345 dprintk("nfs: decode_setclientid: Server returned operation"
5346 " %d\n", opnum);
5347 return -EIO;
5348 }
5349 nfserr = be32_to_cpup(p);
5350 if (nfserr == NFS_OK) {
5351 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5352 if (unlikely(!p))
5353 return -EIO;
5354 p = xdr_decode_hyper(p, &res->clientid);
5355 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5356 } else if (nfserr == NFSERR_CLID_INUSE) {
5357 uint32_t len;
5358
5359 /* skip netid string */
5360 p = xdr_inline_decode(xdr, 4);
5361 if (unlikely(!p))
5362 return -EIO;
5363 len = be32_to_cpup(p);
5364 p = xdr_inline_decode(xdr, len);
5365 if (unlikely(!p))
5366 return -EIO;
5367
5368 /* skip uaddr string */
5369 p = xdr_inline_decode(xdr, 4);
5370 if (unlikely(!p))
5371 return -EIO;
5372 len = be32_to_cpup(p);
5373 p = xdr_inline_decode(xdr, len);
5374 if (unlikely(!p))
5375 return -EIO;
5376 return -NFSERR_CLID_INUSE;
5377 } else
5378 return nfs4_stat_to_errno(nfserr);
5379
5380 return 0;
5381 }
5382
5383 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5384 {
5385 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5386 }
5387
5388 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5389 {
5390 __be32 *p;
5391 int status;
5392
5393 status = decode_op_hdr(xdr, OP_WRITE);
5394 if (status)
5395 return status;
5396
5397 p = xdr_inline_decode(xdr, 8);
5398 if (unlikely(!p))
5399 return -EIO;
5400 res->count = be32_to_cpup(p++);
5401 res->verf->committed = be32_to_cpup(p++);
5402 return decode_write_verifier(xdr, &res->verf->verifier);
5403 }
5404
5405 static int decode_delegreturn(struct xdr_stream *xdr)
5406 {
5407 return decode_op_hdr(xdr, OP_DELEGRETURN);
5408 }
5409
5410 static int decode_secinfo_gss(struct xdr_stream *xdr,
5411 struct nfs4_secinfo4 *flavor)
5412 {
5413 u32 oid_len;
5414 __be32 *p;
5415
5416 p = xdr_inline_decode(xdr, 4);
5417 if (unlikely(!p))
5418 return -EIO;
5419 oid_len = be32_to_cpup(p);
5420 if (oid_len > GSS_OID_MAX_LEN)
5421 return -EINVAL;
5422
5423 p = xdr_inline_decode(xdr, oid_len);
5424 if (unlikely(!p))
5425 return -EIO;
5426 memcpy(flavor->flavor_info.oid.data, p, oid_len);
5427 flavor->flavor_info.oid.len = oid_len;
5428
5429 p = xdr_inline_decode(xdr, 8);
5430 if (unlikely(!p))
5431 return -EIO;
5432 flavor->flavor_info.qop = be32_to_cpup(p++);
5433 flavor->flavor_info.service = be32_to_cpup(p);
5434
5435 return 0;
5436 }
5437
5438 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5439 {
5440 struct nfs4_secinfo4 *sec_flavor;
5441 unsigned int i, num_flavors;
5442 int status;
5443 __be32 *p;
5444
5445 p = xdr_inline_decode(xdr, 4);
5446 if (unlikely(!p))
5447 return -EIO;
5448
5449 res->flavors->num_flavors = 0;
5450 num_flavors = be32_to_cpup(p);
5451
5452 for (i = 0; i < num_flavors; i++) {
5453 sec_flavor = &res->flavors->flavors[i];
5454 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5455 break;
5456
5457 p = xdr_inline_decode(xdr, 4);
5458 if (unlikely(!p))
5459 return -EIO;
5460 sec_flavor->flavor = be32_to_cpup(p);
5461
5462 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5463 status = decode_secinfo_gss(xdr, sec_flavor);
5464 if (status)
5465 goto out;
5466 }
5467 res->flavors->num_flavors++;
5468 }
5469
5470 status = 0;
5471 out:
5472 return status;
5473 }
5474
5475 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5476 {
5477 int status = decode_op_hdr(xdr, OP_SECINFO);
5478 if (status)
5479 return status;
5480 return decode_secinfo_common(xdr, res);
5481 }
5482
5483 #if defined(CONFIG_NFS_V4_1)
5484 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5485 {
5486 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5487 if (status)
5488 return status;
5489 return decode_secinfo_common(xdr, res);
5490 }
5491
5492 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5493 {
5494 __be32 *p;
5495 uint32_t bitmap_words;
5496 unsigned int i;
5497
5498 p = xdr_inline_decode(xdr, 4);
5499 if (!p)
5500 return -EIO;
5501 bitmap_words = be32_to_cpup(p++);
5502 if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5503 return -EIO;
5504 p = xdr_inline_decode(xdr, 4 * bitmap_words);
5505 for (i = 0; i < bitmap_words; i++)
5506 op_map->u.words[i] = be32_to_cpup(p++);
5507
5508 return 0;
5509 }
5510
5511 static int decode_exchange_id(struct xdr_stream *xdr,
5512 struct nfs41_exchange_id_res *res)
5513 {
5514 __be32 *p;
5515 uint32_t dummy;
5516 char *dummy_str;
5517 int status;
5518 uint32_t impl_id_count;
5519
5520 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5521 if (status)
5522 return status;
5523
5524 p = xdr_inline_decode(xdr, 8);
5525 if (unlikely(!p))
5526 return -EIO;
5527 xdr_decode_hyper(p, &res->clientid);
5528 p = xdr_inline_decode(xdr, 12);
5529 if (unlikely(!p))
5530 return -EIO;
5531 res->seqid = be32_to_cpup(p++);
5532 res->flags = be32_to_cpup(p++);
5533
5534 res->state_protect.how = be32_to_cpup(p);
5535 switch (res->state_protect.how) {
5536 case SP4_NONE:
5537 break;
5538 case SP4_MACH_CRED:
5539 status = decode_op_map(xdr, &res->state_protect.enforce);
5540 if (status)
5541 return status;
5542 status = decode_op_map(xdr, &res->state_protect.allow);
5543 if (status)
5544 return status;
5545 break;
5546 default:
5547 WARN_ON_ONCE(1);
5548 return -EIO;
5549 }
5550
5551 /* server_owner4.so_minor_id */
5552 p = xdr_inline_decode(xdr, 8);
5553 if (unlikely(!p))
5554 return -EIO;
5555 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5556
5557 /* server_owner4.so_major_id */
5558 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5559 if (unlikely(status))
5560 return status;
5561 memcpy(res->server_owner->major_id, dummy_str, dummy);
5562 res->server_owner->major_id_sz = dummy;
5563
5564 /* server_scope4 */
5565 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5566 if (unlikely(status))
5567 return status;
5568 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5569 res->server_scope->server_scope_sz = dummy;
5570
5571 /* Implementation Id */
5572 p = xdr_inline_decode(xdr, 4);
5573 if (unlikely(!p))
5574 return -EIO;
5575 impl_id_count = be32_to_cpup(p++);
5576
5577 if (impl_id_count) {
5578 /* nii_domain */
5579 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5580 if (unlikely(status))
5581 return status;
5582 memcpy(res->impl_id->domain, dummy_str, dummy);
5583
5584 /* nii_name */
5585 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5586 if (unlikely(status))
5587 return status;
5588 memcpy(res->impl_id->name, dummy_str, dummy);
5589
5590 /* nii_date */
5591 p = xdr_inline_decode(xdr, 12);
5592 if (unlikely(!p))
5593 return -EIO;
5594 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5595 res->impl_id->date.nseconds = be32_to_cpup(p);
5596
5597 /* if there's more than one entry, ignore the rest */
5598 }
5599 return 0;
5600 }
5601
5602 static int decode_chan_attrs(struct xdr_stream *xdr,
5603 struct nfs4_channel_attrs *attrs)
5604 {
5605 __be32 *p;
5606 u32 nr_attrs, val;
5607
5608 p = xdr_inline_decode(xdr, 28);
5609 if (unlikely(!p))
5610 return -EIO;
5611 val = be32_to_cpup(p++); /* headerpadsz */
5612 if (val)
5613 return -EINVAL; /* no support for header padding yet */
5614 attrs->max_rqst_sz = be32_to_cpup(p++);
5615 attrs->max_resp_sz = be32_to_cpup(p++);
5616 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5617 attrs->max_ops = be32_to_cpup(p++);
5618 attrs->max_reqs = be32_to_cpup(p++);
5619 nr_attrs = be32_to_cpup(p);
5620 if (unlikely(nr_attrs > 1)) {
5621 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5622 "count %u\n", __func__, nr_attrs);
5623 return -EINVAL;
5624 }
5625 if (nr_attrs == 1) {
5626 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5627 if (unlikely(!p))
5628 return -EIO;
5629 }
5630 return 0;
5631 }
5632
5633 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5634 {
5635 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5636 }
5637
5638 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5639 struct nfs41_bind_conn_to_session_res *res)
5640 {
5641 __be32 *p;
5642 int status;
5643
5644 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5645 if (!status)
5646 status = decode_sessionid(xdr, &res->sessionid);
5647 if (unlikely(status))
5648 return status;
5649
5650 /* dir flags, rdma mode bool */
5651 p = xdr_inline_decode(xdr, 8);
5652 if (unlikely(!p))
5653 return -EIO;
5654
5655 res->dir = be32_to_cpup(p++);
5656 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5657 return -EIO;
5658 if (be32_to_cpup(p) == 0)
5659 res->use_conn_in_rdma_mode = false;
5660 else
5661 res->use_conn_in_rdma_mode = true;
5662
5663 return 0;
5664 }
5665
5666 static int decode_create_session(struct xdr_stream *xdr,
5667 struct nfs41_create_session_res *res)
5668 {
5669 __be32 *p;
5670 int status;
5671
5672 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5673 if (!status)
5674 status = decode_sessionid(xdr, &res->sessionid);
5675 if (unlikely(status))
5676 return status;
5677
5678 /* seqid, flags */
5679 p = xdr_inline_decode(xdr, 8);
5680 if (unlikely(!p))
5681 return -EIO;
5682 res->seqid = be32_to_cpup(p++);
5683 res->flags = be32_to_cpup(p);
5684
5685 /* Channel attributes */
5686 status = decode_chan_attrs(xdr, &res->fc_attrs);
5687 if (!status)
5688 status = decode_chan_attrs(xdr, &res->bc_attrs);
5689 return status;
5690 }
5691
5692 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5693 {
5694 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5695 }
5696
5697 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5698 {
5699 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5700 }
5701
5702 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5703 {
5704 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5705 }
5706 #endif /* CONFIG_NFS_V4_1 */
5707
5708 static int decode_sequence(struct xdr_stream *xdr,
5709 struct nfs4_sequence_res *res,
5710 struct rpc_rqst *rqstp)
5711 {
5712 #if defined(CONFIG_NFS_V4_1)
5713 struct nfs4_session *session;
5714 struct nfs4_sessionid id;
5715 u32 dummy;
5716 int status;
5717 __be32 *p;
5718
5719 if (res->sr_slot == NULL)
5720 return 0;
5721 if (!res->sr_slot->table->session)
5722 return 0;
5723
5724 status = decode_op_hdr(xdr, OP_SEQUENCE);
5725 if (!status)
5726 status = decode_sessionid(xdr, &id);
5727 if (unlikely(status))
5728 goto out_err;
5729
5730 /*
5731 * If the server returns different values for sessionID, slotID or
5732 * sequence number, the server is looney tunes.
5733 */
5734 status = -EREMOTEIO;
5735 session = res->sr_slot->table->session;
5736
5737 if (memcmp(id.data, session->sess_id.data,
5738 NFS4_MAX_SESSIONID_LEN)) {
5739 dprintk("%s Invalid session id\n", __func__);
5740 goto out_err;
5741 }
5742
5743 p = xdr_inline_decode(xdr, 20);
5744 if (unlikely(!p))
5745 goto out_overflow;
5746
5747 /* seqid */
5748 dummy = be32_to_cpup(p++);
5749 if (dummy != res->sr_slot->seq_nr) {
5750 dprintk("%s Invalid sequence number\n", __func__);
5751 goto out_err;
5752 }
5753 /* slot id */
5754 dummy = be32_to_cpup(p++);
5755 if (dummy != res->sr_slot->slot_nr) {
5756 dprintk("%s Invalid slot id\n", __func__);
5757 goto out_err;
5758 }
5759 /* highest slot id */
5760 res->sr_highest_slotid = be32_to_cpup(p++);
5761 /* target highest slot id */
5762 res->sr_target_highest_slotid = be32_to_cpup(p++);
5763 /* result flags */
5764 res->sr_status_flags = be32_to_cpup(p);
5765 status = 0;
5766 out_err:
5767 res->sr_status = status;
5768 return status;
5769 out_overflow:
5770 status = -EIO;
5771 goto out_err;
5772 #else /* CONFIG_NFS_V4_1 */
5773 return 0;
5774 #endif /* CONFIG_NFS_V4_1 */
5775 }
5776
5777 #if defined(CONFIG_NFS_V4_1)
5778 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5779 {
5780 stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5781 return decode_stateid(xdr, stateid);
5782 }
5783
5784 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5785 struct nfs4_getdeviceinfo_res *res)
5786 {
5787 struct pnfs_device *pdev = res->pdev;
5788 __be32 *p;
5789 uint32_t len, type;
5790 int status;
5791
5792 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5793 if (status) {
5794 if (status == -ETOOSMALL) {
5795 p = xdr_inline_decode(xdr, 4);
5796 if (unlikely(!p))
5797 return -EIO;
5798 pdev->mincount = be32_to_cpup(p);
5799 dprintk("%s: Min count too small. mincnt = %u\n",
5800 __func__, pdev->mincount);
5801 }
5802 return status;
5803 }
5804
5805 p = xdr_inline_decode(xdr, 8);
5806 if (unlikely(!p))
5807 return -EIO;
5808 type = be32_to_cpup(p++);
5809 if (type != pdev->layout_type) {
5810 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5811 __func__, pdev->layout_type, type);
5812 return -EINVAL;
5813 }
5814 /*
5815 * Get the length of the opaque device_addr4. xdr_read_pages places
5816 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5817 * and places the remaining xdr data in xdr_buf->tail
5818 */
5819 pdev->mincount = be32_to_cpup(p);
5820 if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5821 return -EIO;
5822
5823 /* Parse notification bitmap, verifying that it is zero. */
5824 p = xdr_inline_decode(xdr, 4);
5825 if (unlikely(!p))
5826 return -EIO;
5827 len = be32_to_cpup(p);
5828 if (len) {
5829 uint32_t i;
5830
5831 p = xdr_inline_decode(xdr, 4 * len);
5832 if (unlikely(!p))
5833 return -EIO;
5834
5835 res->notification = be32_to_cpup(p++);
5836 for (i = 1; i < len; i++) {
5837 if (be32_to_cpup(p++)) {
5838 dprintk("%s: unsupported notification\n",
5839 __func__);
5840 return -EIO;
5841 }
5842 }
5843 }
5844 return 0;
5845 }
5846
5847 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5848 struct nfs4_layoutget_res *res)
5849 {
5850 __be32 *p;
5851 int status;
5852 u32 layout_count;
5853 u32 recvd;
5854
5855 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5856 if (status)
5857 goto out;
5858 p = xdr_inline_decode(xdr, 4);
5859 if (unlikely(!p))
5860 goto out_overflow;
5861 res->return_on_close = be32_to_cpup(p);
5862 decode_layout_stateid(xdr, &res->stateid);
5863 p = xdr_inline_decode(xdr, 4);
5864 if (unlikely(!p))
5865 goto out_overflow;
5866 layout_count = be32_to_cpup(p);
5867 if (!layout_count) {
5868 dprintk("%s: server responded with empty layout array\n",
5869 __func__);
5870 status = -EINVAL;
5871 goto out;
5872 }
5873
5874 p = xdr_inline_decode(xdr, 28);
5875 if (unlikely(!p))
5876 goto out_overflow;
5877 p = xdr_decode_hyper(p, &res->range.offset);
5878 p = xdr_decode_hyper(p, &res->range.length);
5879 res->range.iomode = be32_to_cpup(p++);
5880 res->type = be32_to_cpup(p++);
5881 res->layoutp->len = be32_to_cpup(p);
5882
5883 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5884 __func__,
5885 (unsigned long)res->range.offset,
5886 (unsigned long)res->range.length,
5887 res->range.iomode,
5888 res->type,
5889 res->layoutp->len);
5890
5891 recvd = xdr_read_pages(xdr, res->layoutp->len);
5892 if (res->layoutp->len > recvd) {
5893 dprintk("NFS: server cheating in layoutget reply: "
5894 "layout len %u > recvd %u\n",
5895 res->layoutp->len, recvd);
5896 status = -EINVAL;
5897 goto out;
5898 }
5899
5900 if (layout_count > 1) {
5901 /* We only handle a length one array at the moment. Any
5902 * further entries are just ignored. Note that this means
5903 * the client may see a response that is less than the
5904 * minimum it requested.
5905 */
5906 dprintk("%s: server responded with %d layouts, dropping tail\n",
5907 __func__, layout_count);
5908 }
5909
5910 out:
5911 res->status = status;
5912 return status;
5913 out_overflow:
5914 status = -EIO;
5915 goto out;
5916 }
5917
5918 static int decode_layoutreturn(struct xdr_stream *xdr,
5919 struct nfs4_layoutreturn_res *res)
5920 {
5921 __be32 *p;
5922 int status;
5923
5924 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5925 if (status)
5926 return status;
5927 p = xdr_inline_decode(xdr, 4);
5928 if (unlikely(!p))
5929 return -EIO;
5930 res->lrs_present = be32_to_cpup(p);
5931 if (res->lrs_present)
5932 status = decode_layout_stateid(xdr, &res->stateid);
5933 else
5934 nfs4_stateid_copy(&res->stateid, &invalid_stateid);
5935 return status;
5936 }
5937
5938 static int decode_layoutcommit(struct xdr_stream *xdr,
5939 struct rpc_rqst *req,
5940 struct nfs4_layoutcommit_res *res)
5941 {
5942 __be32 *p;
5943 __u32 sizechanged;
5944 int status;
5945
5946 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5947 res->status = status;
5948 if (status)
5949 return status;
5950
5951 p = xdr_inline_decode(xdr, 4);
5952 if (unlikely(!p))
5953 return -EIO;
5954 sizechanged = be32_to_cpup(p);
5955
5956 if (sizechanged) {
5957 /* throw away new size */
5958 p = xdr_inline_decode(xdr, 8);
5959 if (unlikely(!p))
5960 return -EIO;
5961 }
5962 return 0;
5963 }
5964
5965 static int decode_test_stateid(struct xdr_stream *xdr,
5966 struct nfs41_test_stateid_res *res)
5967 {
5968 __be32 *p;
5969 int status;
5970 int num_res;
5971
5972 status = decode_op_hdr(xdr, OP_TEST_STATEID);
5973 if (status)
5974 return status;
5975
5976 p = xdr_inline_decode(xdr, 4);
5977 if (unlikely(!p))
5978 return -EIO;
5979 num_res = be32_to_cpup(p++);
5980 if (num_res != 1)
5981 return -EIO;
5982
5983 p = xdr_inline_decode(xdr, 4);
5984 if (unlikely(!p))
5985 return -EIO;
5986 res->status = be32_to_cpup(p++);
5987
5988 return status;
5989 }
5990
5991 static int decode_free_stateid(struct xdr_stream *xdr,
5992 struct nfs41_free_stateid_res *res)
5993 {
5994 res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
5995 return res->status;
5996 }
5997 #else
5998 static inline
5999 int decode_layoutreturn(struct xdr_stream *xdr,
6000 struct nfs4_layoutreturn_res *res)
6001 {
6002 return 0;
6003 }
6004
6005 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6006 struct nfs4_layoutget_res *res)
6007 {
6008 return 0;
6009 }
6010
6011 #endif /* CONFIG_NFS_V4_1 */
6012
6013 /*
6014 * END OF "GENERIC" DECODE ROUTINES.
6015 */
6016
6017 /*
6018 * Decode OPEN_DOWNGRADE response
6019 */
6020 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6021 struct xdr_stream *xdr,
6022 void *data)
6023 {
6024 struct nfs_closeres *res = data;
6025 struct compound_hdr hdr;
6026 int status;
6027
6028 status = decode_compound_hdr(xdr, &hdr);
6029 if (status)
6030 goto out;
6031 status = decode_sequence(xdr, &res->seq_res, rqstp);
6032 if (status)
6033 goto out;
6034 status = decode_putfh(xdr);
6035 if (status)
6036 goto out;
6037 if (res->lr_res) {
6038 status = decode_layoutreturn(xdr, res->lr_res);
6039 res->lr_ret = status;
6040 if (status)
6041 goto out;
6042 }
6043 status = decode_open_downgrade(xdr, res);
6044 out:
6045 return status;
6046 }
6047
6048 /*
6049 * Decode ACCESS response
6050 */
6051 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6052 void *data)
6053 {
6054 struct nfs4_accessres *res = data;
6055 struct compound_hdr hdr;
6056 int status;
6057
6058 status = decode_compound_hdr(xdr, &hdr);
6059 if (status)
6060 goto out;
6061 status = decode_sequence(xdr, &res->seq_res, rqstp);
6062 if (status)
6063 goto out;
6064 status = decode_putfh(xdr);
6065 if (status != 0)
6066 goto out;
6067 status = decode_access(xdr, &res->supported, &res->access);
6068 if (status != 0)
6069 goto out;
6070 if (res->fattr)
6071 decode_getfattr(xdr, res->fattr, res->server);
6072 out:
6073 return status;
6074 }
6075
6076 /*
6077 * Decode LOOKUP response
6078 */
6079 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6080 void *data)
6081 {
6082 struct nfs4_lookup_res *res = data;
6083 struct compound_hdr hdr;
6084 int status;
6085
6086 status = decode_compound_hdr(xdr, &hdr);
6087 if (status)
6088 goto out;
6089 status = decode_sequence(xdr, &res->seq_res, rqstp);
6090 if (status)
6091 goto out;
6092 status = decode_putfh(xdr);
6093 if (status)
6094 goto out;
6095 status = decode_lookup(xdr);
6096 if (status)
6097 goto out;
6098 status = decode_getfh(xdr, res->fh);
6099 if (status)
6100 goto out;
6101 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6102 out:
6103 return status;
6104 }
6105
6106 /*
6107 * Decode LOOKUPP response
6108 */
6109 static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6110 void *data)
6111 {
6112 struct nfs4_lookupp_res *res = data;
6113 struct compound_hdr hdr;
6114 int status;
6115
6116 status = decode_compound_hdr(xdr, &hdr);
6117 if (status)
6118 goto out;
6119 status = decode_sequence(xdr, &res->seq_res, rqstp);
6120 if (status)
6121 goto out;
6122 status = decode_putfh(xdr);
6123 if (status)
6124 goto out;
6125 status = decode_lookupp(xdr);
6126 if (status)
6127 goto out;
6128 status = decode_getfh(xdr, res->fh);
6129 if (status)
6130 goto out;
6131 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6132 out:
6133 return status;
6134 }
6135
6136 /*
6137 * Decode LOOKUP_ROOT response
6138 */
6139 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6140 struct xdr_stream *xdr,
6141 void *data)
6142 {
6143 struct nfs4_lookup_res *res = data;
6144 struct compound_hdr hdr;
6145 int status;
6146
6147 status = decode_compound_hdr(xdr, &hdr);
6148 if (status)
6149 goto out;
6150 status = decode_sequence(xdr, &res->seq_res, rqstp);
6151 if (status)
6152 goto out;
6153 status = decode_putrootfh(xdr);
6154 if (status)
6155 goto out;
6156 status = decode_getfh(xdr, res->fh);
6157 if (status == 0)
6158 status = decode_getfattr_label(xdr, res->fattr,
6159 res->label, res->server);
6160 out:
6161 return status;
6162 }
6163
6164 /*
6165 * Decode REMOVE response
6166 */
6167 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6168 void *data)
6169 {
6170 struct nfs_removeres *res = data;
6171 struct compound_hdr hdr;
6172 int status;
6173
6174 status = decode_compound_hdr(xdr, &hdr);
6175 if (status)
6176 goto out;
6177 status = decode_sequence(xdr, &res->seq_res, rqstp);
6178 if (status)
6179 goto out;
6180 status = decode_putfh(xdr);
6181 if (status)
6182 goto out;
6183 status = decode_remove(xdr, &res->cinfo);
6184 out:
6185 return status;
6186 }
6187
6188 /*
6189 * Decode RENAME response
6190 */
6191 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6192 void *data)
6193 {
6194 struct nfs_renameres *res = data;
6195 struct compound_hdr hdr;
6196 int status;
6197
6198 status = decode_compound_hdr(xdr, &hdr);
6199 if (status)
6200 goto out;
6201 status = decode_sequence(xdr, &res->seq_res, rqstp);
6202 if (status)
6203 goto out;
6204 status = decode_putfh(xdr);
6205 if (status)
6206 goto out;
6207 status = decode_savefh(xdr);
6208 if (status)
6209 goto out;
6210 status = decode_putfh(xdr);
6211 if (status)
6212 goto out;
6213 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6214 out:
6215 return status;
6216 }
6217
6218 /*
6219 * Decode LINK response
6220 */
6221 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6222 void *data)
6223 {
6224 struct nfs4_link_res *res = data;
6225 struct compound_hdr hdr;
6226 int status;
6227
6228 status = decode_compound_hdr(xdr, &hdr);
6229 if (status)
6230 goto out;
6231 status = decode_sequence(xdr, &res->seq_res, rqstp);
6232 if (status)
6233 goto out;
6234 status = decode_putfh(xdr);
6235 if (status)
6236 goto out;
6237 status = decode_savefh(xdr);
6238 if (status)
6239 goto out;
6240 status = decode_putfh(xdr);
6241 if (status)
6242 goto out;
6243 status = decode_link(xdr, &res->cinfo);
6244 if (status)
6245 goto out;
6246 /*
6247 * Note order: OP_LINK leaves the directory as the current
6248 * filehandle.
6249 */
6250 status = decode_restorefh(xdr);
6251 if (status)
6252 goto out;
6253 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6254 out:
6255 return status;
6256 }
6257
6258 /*
6259 * Decode CREATE response
6260 */
6261 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6262 void *data)
6263 {
6264 struct nfs4_create_res *res = data;
6265 struct compound_hdr hdr;
6266 int status;
6267
6268 status = decode_compound_hdr(xdr, &hdr);
6269 if (status)
6270 goto out;
6271 status = decode_sequence(xdr, &res->seq_res, rqstp);
6272 if (status)
6273 goto out;
6274 status = decode_putfh(xdr);
6275 if (status)
6276 goto out;
6277 status = decode_create(xdr, &res->dir_cinfo);
6278 if (status)
6279 goto out;
6280 status = decode_getfh(xdr, res->fh);
6281 if (status)
6282 goto out;
6283 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6284 out:
6285 return status;
6286 }
6287
6288 /*
6289 * Decode SYMLINK response
6290 */
6291 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6292 void *res)
6293 {
6294 return nfs4_xdr_dec_create(rqstp, xdr, res);
6295 }
6296
6297 /*
6298 * Decode GETATTR response
6299 */
6300 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6301 void *data)
6302 {
6303 struct nfs4_getattr_res *res = data;
6304 struct compound_hdr hdr;
6305 int status;
6306
6307 status = decode_compound_hdr(xdr, &hdr);
6308 if (status)
6309 goto out;
6310 status = decode_sequence(xdr, &res->seq_res, rqstp);
6311 if (status)
6312 goto out;
6313 status = decode_putfh(xdr);
6314 if (status)
6315 goto out;
6316 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6317 out:
6318 return status;
6319 }
6320
6321 /*
6322 * Encode an SETACL request
6323 */
6324 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6325 const void *data)
6326 {
6327 const struct nfs_setaclargs *args = data;
6328 struct compound_hdr hdr = {
6329 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6330 };
6331
6332 encode_compound_hdr(xdr, req, &hdr);
6333 encode_sequence(xdr, &args->seq_args, &hdr);
6334 encode_putfh(xdr, args->fh, &hdr);
6335 encode_setacl(xdr, args, &hdr);
6336 encode_nops(&hdr);
6337 }
6338
6339 /*
6340 * Decode SETACL response
6341 */
6342 static int
6343 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6344 void *data)
6345 {
6346 struct nfs_setaclres *res = data;
6347 struct compound_hdr hdr;
6348 int status;
6349
6350 status = decode_compound_hdr(xdr, &hdr);
6351 if (status)
6352 goto out;
6353 status = decode_sequence(xdr, &res->seq_res, rqstp);
6354 if (status)
6355 goto out;
6356 status = decode_putfh(xdr);
6357 if (status)
6358 goto out;
6359 status = decode_setattr(xdr);
6360 out:
6361 return status;
6362 }
6363
6364 /*
6365 * Decode GETACL response
6366 */
6367 static int
6368 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6369 void *data)
6370 {
6371 struct nfs_getaclres *res = data;
6372 struct compound_hdr hdr;
6373 int status;
6374
6375 if (res->acl_scratch != NULL) {
6376 void *p = page_address(res->acl_scratch);
6377 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6378 }
6379 status = decode_compound_hdr(xdr, &hdr);
6380 if (status)
6381 goto out;
6382 status = decode_sequence(xdr, &res->seq_res, rqstp);
6383 if (status)
6384 goto out;
6385 status = decode_putfh(xdr);
6386 if (status)
6387 goto out;
6388 status = decode_getacl(xdr, rqstp, res);
6389
6390 out:
6391 return status;
6392 }
6393
6394 /*
6395 * Decode CLOSE response
6396 */
6397 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6398 void *data)
6399 {
6400 struct nfs_closeres *res = data;
6401 struct compound_hdr hdr;
6402 int status;
6403
6404 status = decode_compound_hdr(xdr, &hdr);
6405 if (status)
6406 goto out;
6407 status = decode_sequence(xdr, &res->seq_res, rqstp);
6408 if (status)
6409 goto out;
6410 status = decode_putfh(xdr);
6411 if (status)
6412 goto out;
6413 if (res->lr_res) {
6414 status = decode_layoutreturn(xdr, res->lr_res);
6415 res->lr_ret = status;
6416 if (status)
6417 goto out;
6418 }
6419 if (res->fattr != NULL) {
6420 status = decode_getfattr(xdr, res->fattr, res->server);
6421 if (status != 0)
6422 goto out;
6423 }
6424 status = decode_close(xdr, res);
6425 out:
6426 return status;
6427 }
6428
6429 /*
6430 * Decode OPEN response
6431 */
6432 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6433 void *data)
6434 {
6435 struct nfs_openres *res = data;
6436 struct compound_hdr hdr;
6437 int status;
6438
6439 status = decode_compound_hdr(xdr, &hdr);
6440 if (status)
6441 goto out;
6442 status = decode_sequence(xdr, &res->seq_res, rqstp);
6443 if (status)
6444 goto out;
6445 status = decode_putfh(xdr);
6446 if (status)
6447 goto out;
6448 status = decode_open(xdr, res);
6449 if (status)
6450 goto out;
6451 status = decode_getfh(xdr, &res->fh);
6452 if (status)
6453 goto out;
6454 if (res->access_request)
6455 decode_access(xdr, &res->access_supported, &res->access_result);
6456 decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6457 if (res->lg_res)
6458 decode_layoutget(xdr, rqstp, res->lg_res);
6459 out:
6460 return status;
6461 }
6462
6463 /*
6464 * Decode OPEN_CONFIRM response
6465 */
6466 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6467 struct xdr_stream *xdr,
6468 void *data)
6469 {
6470 struct nfs_open_confirmres *res = data;
6471 struct compound_hdr hdr;
6472 int status;
6473
6474 status = decode_compound_hdr(xdr, &hdr);
6475 if (status)
6476 goto out;
6477 status = decode_putfh(xdr);
6478 if (status)
6479 goto out;
6480 status = decode_open_confirm(xdr, res);
6481 out:
6482 return status;
6483 }
6484
6485 /*
6486 * Decode OPEN response
6487 */
6488 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6489 struct xdr_stream *xdr,
6490 void *data)
6491 {
6492 struct nfs_openres *res = data;
6493 struct compound_hdr hdr;
6494 int status;
6495
6496 status = decode_compound_hdr(xdr, &hdr);
6497 if (status)
6498 goto out;
6499 status = decode_sequence(xdr, &res->seq_res, rqstp);
6500 if (status)
6501 goto out;
6502 status = decode_putfh(xdr);
6503 if (status)
6504 goto out;
6505 status = decode_open(xdr, res);
6506 if (status)
6507 goto out;
6508 if (res->access_request)
6509 decode_access(xdr, &res->access_supported, &res->access_result);
6510 decode_getfattr(xdr, res->f_attr, res->server);
6511 if (res->lg_res)
6512 decode_layoutget(xdr, rqstp, res->lg_res);
6513 out:
6514 return status;
6515 }
6516
6517 /*
6518 * Decode SETATTR response
6519 */
6520 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6521 struct xdr_stream *xdr,
6522 void *data)
6523 {
6524 struct nfs_setattrres *res = data;
6525 struct compound_hdr hdr;
6526 int status;
6527
6528 status = decode_compound_hdr(xdr, &hdr);
6529 if (status)
6530 goto out;
6531 status = decode_sequence(xdr, &res->seq_res, rqstp);
6532 if (status)
6533 goto out;
6534 status = decode_putfh(xdr);
6535 if (status)
6536 goto out;
6537 status = decode_setattr(xdr);
6538 if (status)
6539 goto out;
6540 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6541 out:
6542 return status;
6543 }
6544
6545 /*
6546 * Decode LOCK response
6547 */
6548 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6549 void *data)
6550 {
6551 struct nfs_lock_res *res = data;
6552 struct compound_hdr hdr;
6553 int status;
6554
6555 status = decode_compound_hdr(xdr, &hdr);
6556 if (status)
6557 goto out;
6558 status = decode_sequence(xdr, &res->seq_res, rqstp);
6559 if (status)
6560 goto out;
6561 status = decode_putfh(xdr);
6562 if (status)
6563 goto out;
6564 status = decode_lock(xdr, res);
6565 out:
6566 return status;
6567 }
6568
6569 /*
6570 * Decode LOCKT response
6571 */
6572 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6573 void *data)
6574 {
6575 struct nfs_lockt_res *res = data;
6576 struct compound_hdr hdr;
6577 int status;
6578
6579 status = decode_compound_hdr(xdr, &hdr);
6580 if (status)
6581 goto out;
6582 status = decode_sequence(xdr, &res->seq_res, rqstp);
6583 if (status)
6584 goto out;
6585 status = decode_putfh(xdr);
6586 if (status)
6587 goto out;
6588 status = decode_lockt(xdr, res);
6589 out:
6590 return status;
6591 }
6592
6593 /*
6594 * Decode LOCKU response
6595 */
6596 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6597 void *data)
6598 {
6599 struct nfs_locku_res *res = data;
6600 struct compound_hdr hdr;
6601 int status;
6602
6603 status = decode_compound_hdr(xdr, &hdr);
6604 if (status)
6605 goto out;
6606 status = decode_sequence(xdr, &res->seq_res, rqstp);
6607 if (status)
6608 goto out;
6609 status = decode_putfh(xdr);
6610 if (status)
6611 goto out;
6612 status = decode_locku(xdr, res);
6613 out:
6614 return status;
6615 }
6616
6617 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6618 struct xdr_stream *xdr, void *dummy)
6619 {
6620 struct compound_hdr hdr;
6621 int status;
6622
6623 status = decode_compound_hdr(xdr, &hdr);
6624 if (!status)
6625 status = decode_release_lockowner(xdr);
6626 return status;
6627 }
6628
6629 /*
6630 * Decode READLINK response
6631 */
6632 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6633 struct xdr_stream *xdr,
6634 void *data)
6635 {
6636 struct nfs4_readlink_res *res = data;
6637 struct compound_hdr hdr;
6638 int status;
6639
6640 status = decode_compound_hdr(xdr, &hdr);
6641 if (status)
6642 goto out;
6643 status = decode_sequence(xdr, &res->seq_res, rqstp);
6644 if (status)
6645 goto out;
6646 status = decode_putfh(xdr);
6647 if (status)
6648 goto out;
6649 status = decode_readlink(xdr, rqstp);
6650 out:
6651 return status;
6652 }
6653
6654 /*
6655 * Decode READDIR response
6656 */
6657 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6658 void *data)
6659 {
6660 struct nfs4_readdir_res *res = data;
6661 struct compound_hdr hdr;
6662 int status;
6663
6664 status = decode_compound_hdr(xdr, &hdr);
6665 if (status)
6666 goto out;
6667 status = decode_sequence(xdr, &res->seq_res, rqstp);
6668 if (status)
6669 goto out;
6670 status = decode_putfh(xdr);
6671 if (status)
6672 goto out;
6673 status = decode_readdir(xdr, rqstp, res);
6674 out:
6675 return status;
6676 }
6677
6678 /*
6679 * Decode Read response
6680 */
6681 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6682 void *data)
6683 {
6684 struct nfs_pgio_res *res = data;
6685 struct compound_hdr hdr;
6686 int status;
6687
6688 status = decode_compound_hdr(xdr, &hdr);
6689 res->op_status = hdr.status;
6690 if (status)
6691 goto out;
6692 status = decode_sequence(xdr, &res->seq_res, rqstp);
6693 if (status)
6694 goto out;
6695 status = decode_putfh(xdr);
6696 if (status)
6697 goto out;
6698 status = decode_read(xdr, rqstp, res);
6699 if (!status)
6700 status = res->count;
6701 out:
6702 return status;
6703 }
6704
6705 /*
6706 * Decode WRITE response
6707 */
6708 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6709 void *data)
6710 {
6711 struct nfs_pgio_res *res = data;
6712 struct compound_hdr hdr;
6713 int status;
6714
6715 status = decode_compound_hdr(xdr, &hdr);
6716 res->op_status = hdr.status;
6717 if (status)
6718 goto out;
6719 status = decode_sequence(xdr, &res->seq_res, rqstp);
6720 if (status)
6721 goto out;
6722 status = decode_putfh(xdr);
6723 if (status)
6724 goto out;
6725 status = decode_write(xdr, res);
6726 if (status)
6727 goto out;
6728 if (res->fattr)
6729 decode_getfattr(xdr, res->fattr, res->server);
6730 if (!status)
6731 status = res->count;
6732 out:
6733 return status;
6734 }
6735
6736 /*
6737 * Decode COMMIT response
6738 */
6739 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6740 void *data)
6741 {
6742 struct nfs_commitres *res = data;
6743 struct compound_hdr hdr;
6744 int status;
6745
6746 status = decode_compound_hdr(xdr, &hdr);
6747 res->op_status = hdr.status;
6748 if (status)
6749 goto out;
6750 status = decode_sequence(xdr, &res->seq_res, rqstp);
6751 if (status)
6752 goto out;
6753 status = decode_putfh(xdr);
6754 if (status)
6755 goto out;
6756 status = decode_commit(xdr, res);
6757 out:
6758 return status;
6759 }
6760
6761 /*
6762 * Decode FSINFO response
6763 */
6764 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6765 void *data)
6766 {
6767 struct nfs4_fsinfo_res *res = data;
6768 struct compound_hdr hdr;
6769 int status;
6770
6771 status = decode_compound_hdr(xdr, &hdr);
6772 if (!status)
6773 status = decode_sequence(xdr, &res->seq_res, req);
6774 if (!status)
6775 status = decode_putfh(xdr);
6776 if (!status)
6777 status = decode_fsinfo(xdr, res->fsinfo);
6778 return status;
6779 }
6780
6781 /*
6782 * Decode PATHCONF response
6783 */
6784 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6785 void *data)
6786 {
6787 struct nfs4_pathconf_res *res = data;
6788 struct compound_hdr hdr;
6789 int status;
6790
6791 status = decode_compound_hdr(xdr, &hdr);
6792 if (!status)
6793 status = decode_sequence(xdr, &res->seq_res, req);
6794 if (!status)
6795 status = decode_putfh(xdr);
6796 if (!status)
6797 status = decode_pathconf(xdr, res->pathconf);
6798 return status;
6799 }
6800
6801 /*
6802 * Decode STATFS response
6803 */
6804 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6805 void *data)
6806 {
6807 struct nfs4_statfs_res *res = data;
6808 struct compound_hdr hdr;
6809 int status;
6810
6811 status = decode_compound_hdr(xdr, &hdr);
6812 if (!status)
6813 status = decode_sequence(xdr, &res->seq_res, req);
6814 if (!status)
6815 status = decode_putfh(xdr);
6816 if (!status)
6817 status = decode_statfs(xdr, res->fsstat);
6818 return status;
6819 }
6820
6821 /*
6822 * Decode GETATTR_BITMAP response
6823 */
6824 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6825 struct xdr_stream *xdr,
6826 void *data)
6827 {
6828 struct nfs4_server_caps_res *res = data;
6829 struct compound_hdr hdr;
6830 int status;
6831
6832 status = decode_compound_hdr(xdr, &hdr);
6833 if (status)
6834 goto out;
6835 status = decode_sequence(xdr, &res->seq_res, req);
6836 if (status)
6837 goto out;
6838 status = decode_putfh(xdr);
6839 if (status)
6840 goto out;
6841 status = decode_server_caps(xdr, res);
6842 out:
6843 return status;
6844 }
6845
6846 /*
6847 * Decode RENEW response
6848 */
6849 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6850 void *__unused)
6851 {
6852 struct compound_hdr hdr;
6853 int status;
6854
6855 status = decode_compound_hdr(xdr, &hdr);
6856 if (!status)
6857 status = decode_renew(xdr);
6858 return status;
6859 }
6860
6861 /*
6862 * Decode SETCLIENTID response
6863 */
6864 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6865 struct xdr_stream *xdr,
6866 void *data)
6867 {
6868 struct nfs4_setclientid_res *res = data;
6869 struct compound_hdr hdr;
6870 int status;
6871
6872 status = decode_compound_hdr(xdr, &hdr);
6873 if (!status)
6874 status = decode_setclientid(xdr, res);
6875 return status;
6876 }
6877
6878 /*
6879 * Decode SETCLIENTID_CONFIRM response
6880 */
6881 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6882 struct xdr_stream *xdr,
6883 void *data)
6884 {
6885 struct compound_hdr hdr;
6886 int status;
6887
6888 status = decode_compound_hdr(xdr, &hdr);
6889 if (!status)
6890 status = decode_setclientid_confirm(xdr);
6891 return status;
6892 }
6893
6894 /*
6895 * Decode DELEGRETURN response
6896 */
6897 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6898 struct xdr_stream *xdr,
6899 void *data)
6900 {
6901 struct nfs4_delegreturnres *res = data;
6902 struct compound_hdr hdr;
6903 int status;
6904
6905 status = decode_compound_hdr(xdr, &hdr);
6906 if (status)
6907 goto out;
6908 status = decode_sequence(xdr, &res->seq_res, rqstp);
6909 if (status)
6910 goto out;
6911 status = decode_putfh(xdr);
6912 if (status != 0)
6913 goto out;
6914 if (res->lr_res) {
6915 status = decode_layoutreturn(xdr, res->lr_res);
6916 res->lr_ret = status;
6917 if (status)
6918 goto out;
6919 }
6920 if (res->fattr) {
6921 status = decode_getfattr(xdr, res->fattr, res->server);
6922 if (status != 0)
6923 goto out;
6924 }
6925 status = decode_delegreturn(xdr);
6926 out:
6927 return status;
6928 }
6929
6930 /*
6931 * Decode FS_LOCATIONS response
6932 */
6933 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6934 struct xdr_stream *xdr,
6935 void *data)
6936 {
6937 struct nfs4_fs_locations_res *res = data;
6938 struct compound_hdr hdr;
6939 int status;
6940
6941 status = decode_compound_hdr(xdr, &hdr);
6942 if (status)
6943 goto out;
6944 status = decode_sequence(xdr, &res->seq_res, req);
6945 if (status)
6946 goto out;
6947 status = decode_putfh(xdr);
6948 if (status)
6949 goto out;
6950 if (res->migration) {
6951 xdr_enter_page(xdr, PAGE_SIZE);
6952 status = decode_getfattr_generic(xdr,
6953 &res->fs_locations->fattr,
6954 NULL, res->fs_locations,
6955 NULL, res->fs_locations->server);
6956 if (status)
6957 goto out;
6958 if (res->renew)
6959 status = decode_renew(xdr);
6960 } else {
6961 status = decode_lookup(xdr);
6962 if (status)
6963 goto out;
6964 xdr_enter_page(xdr, PAGE_SIZE);
6965 status = decode_getfattr_generic(xdr,
6966 &res->fs_locations->fattr,
6967 NULL, res->fs_locations,
6968 NULL, res->fs_locations->server);
6969 }
6970 out:
6971 return status;
6972 }
6973
6974 /*
6975 * Decode SECINFO response
6976 */
6977 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6978 struct xdr_stream *xdr,
6979 void *data)
6980 {
6981 struct nfs4_secinfo_res *res = data;
6982 struct compound_hdr hdr;
6983 int status;
6984
6985 status = decode_compound_hdr(xdr, &hdr);
6986 if (status)
6987 goto out;
6988 status = decode_sequence(xdr, &res->seq_res, rqstp);
6989 if (status)
6990 goto out;
6991 status = decode_putfh(xdr);
6992 if (status)
6993 goto out;
6994 status = decode_secinfo(xdr, res);
6995 out:
6996 return status;
6997 }
6998
6999 /*
7000 * Decode FSID_PRESENT response
7001 */
7002 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7003 struct xdr_stream *xdr,
7004 void *data)
7005 {
7006 struct nfs4_fsid_present_res *res = data;
7007 struct compound_hdr hdr;
7008 int status;
7009
7010 status = decode_compound_hdr(xdr, &hdr);
7011 if (status)
7012 goto out;
7013 status = decode_sequence(xdr, &res->seq_res, rqstp);
7014 if (status)
7015 goto out;
7016 status = decode_putfh(xdr);
7017 if (status)
7018 goto out;
7019 status = decode_getfh(xdr, res->fh);
7020 if (status)
7021 goto out;
7022 if (res->renew)
7023 status = decode_renew(xdr);
7024 out:
7025 return status;
7026 }
7027
7028 #if defined(CONFIG_NFS_V4_1)
7029 /*
7030 * Decode BIND_CONN_TO_SESSION response
7031 */
7032 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7033 struct xdr_stream *xdr,
7034 void *res)
7035 {
7036 struct compound_hdr hdr;
7037 int status;
7038
7039 status = decode_compound_hdr(xdr, &hdr);
7040 if (!status)
7041 status = decode_bind_conn_to_session(xdr, res);
7042 return status;
7043 }
7044
7045 /*
7046 * Decode EXCHANGE_ID response
7047 */
7048 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7049 struct xdr_stream *xdr,
7050 void *res)
7051 {
7052 struct compound_hdr hdr;
7053 int status;
7054
7055 status = decode_compound_hdr(xdr, &hdr);
7056 if (!status)
7057 status = decode_exchange_id(xdr, res);
7058 return status;
7059 }
7060
7061 /*
7062 * Decode CREATE_SESSION response
7063 */
7064 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7065 struct xdr_stream *xdr,
7066 void *res)
7067 {
7068 struct compound_hdr hdr;
7069 int status;
7070
7071 status = decode_compound_hdr(xdr, &hdr);
7072 if (!status)
7073 status = decode_create_session(xdr, res);
7074 return status;
7075 }
7076
7077 /*
7078 * Decode DESTROY_SESSION response
7079 */
7080 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7081 struct xdr_stream *xdr,
7082 void *res)
7083 {
7084 struct compound_hdr hdr;
7085 int status;
7086
7087 status = decode_compound_hdr(xdr, &hdr);
7088 if (!status)
7089 status = decode_destroy_session(xdr, res);
7090 return status;
7091 }
7092
7093 /*
7094 * Decode DESTROY_CLIENTID response
7095 */
7096 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7097 struct xdr_stream *xdr,
7098 void *res)
7099 {
7100 struct compound_hdr hdr;
7101 int status;
7102
7103 status = decode_compound_hdr(xdr, &hdr);
7104 if (!status)
7105 status = decode_destroy_clientid(xdr, res);
7106 return status;
7107 }
7108
7109 /*
7110 * Decode SEQUENCE response
7111 */
7112 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7113 struct xdr_stream *xdr,
7114 void *res)
7115 {
7116 struct compound_hdr hdr;
7117 int status;
7118
7119 status = decode_compound_hdr(xdr, &hdr);
7120 if (!status)
7121 status = decode_sequence(xdr, res, rqstp);
7122 return status;
7123 }
7124
7125 /*
7126 * Decode GET_LEASE_TIME response
7127 */
7128 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7129 struct xdr_stream *xdr,
7130 void *data)
7131 {
7132 struct nfs4_get_lease_time_res *res = data;
7133 struct compound_hdr hdr;
7134 int status;
7135
7136 status = decode_compound_hdr(xdr, &hdr);
7137 if (!status)
7138 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7139 if (!status)
7140 status = decode_putrootfh(xdr);
7141 if (!status)
7142 status = decode_fsinfo(xdr, res->lr_fsinfo);
7143 return status;
7144 }
7145
7146 /*
7147 * Decode RECLAIM_COMPLETE response
7148 */
7149 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7150 struct xdr_stream *xdr,
7151 void *data)
7152 {
7153 struct nfs41_reclaim_complete_res *res = data;
7154 struct compound_hdr hdr;
7155 int status;
7156
7157 status = decode_compound_hdr(xdr, &hdr);
7158 if (!status)
7159 status = decode_sequence(xdr, &res->seq_res, rqstp);
7160 if (!status)
7161 status = decode_reclaim_complete(xdr, NULL);
7162 return status;
7163 }
7164
7165 /*
7166 * Decode GETDEVINFO response
7167 */
7168 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7169 struct xdr_stream *xdr,
7170 void *data)
7171 {
7172 struct nfs4_getdeviceinfo_res *res = data;
7173 struct compound_hdr hdr;
7174 int status;
7175
7176 status = decode_compound_hdr(xdr, &hdr);
7177 if (status != 0)
7178 goto out;
7179 status = decode_sequence(xdr, &res->seq_res, rqstp);
7180 if (status != 0)
7181 goto out;
7182 status = decode_getdeviceinfo(xdr, res);
7183 out:
7184 return status;
7185 }
7186
7187 /*
7188 * Decode LAYOUTGET response
7189 */
7190 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7191 struct xdr_stream *xdr,
7192 void *data)
7193 {
7194 struct nfs4_layoutget_res *res = data;
7195 struct compound_hdr hdr;
7196 int status;
7197
7198 status = decode_compound_hdr(xdr, &hdr);
7199 if (status)
7200 goto out;
7201 status = decode_sequence(xdr, &res->seq_res, rqstp);
7202 if (status)
7203 goto out;
7204 status = decode_putfh(xdr);
7205 if (status)
7206 goto out;
7207 status = decode_layoutget(xdr, rqstp, res);
7208 out:
7209 return status;
7210 }
7211
7212 /*
7213 * Decode LAYOUTRETURN response
7214 */
7215 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7216 struct xdr_stream *xdr,
7217 void *data)
7218 {
7219 struct nfs4_layoutreturn_res *res = data;
7220 struct compound_hdr hdr;
7221 int status;
7222
7223 status = decode_compound_hdr(xdr, &hdr);
7224 if (status)
7225 goto out;
7226 status = decode_sequence(xdr, &res->seq_res, rqstp);
7227 if (status)
7228 goto out;
7229 status = decode_putfh(xdr);
7230 if (status)
7231 goto out;
7232 status = decode_layoutreturn(xdr, res);
7233 out:
7234 return status;
7235 }
7236
7237 /*
7238 * Decode LAYOUTCOMMIT response
7239 */
7240 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7241 struct xdr_stream *xdr,
7242 void *data)
7243 {
7244 struct nfs4_layoutcommit_res *res = data;
7245 struct compound_hdr hdr;
7246 int status;
7247
7248 status = decode_compound_hdr(xdr, &hdr);
7249 if (status)
7250 goto out;
7251 status = decode_sequence(xdr, &res->seq_res, rqstp);
7252 if (status)
7253 goto out;
7254 status = decode_putfh(xdr);
7255 if (status)
7256 goto out;
7257 status = decode_layoutcommit(xdr, rqstp, res);
7258 if (status)
7259 goto out;
7260 decode_getfattr(xdr, res->fattr, res->server);
7261 out:
7262 return status;
7263 }
7264
7265 /*
7266 * Decode SECINFO_NO_NAME response
7267 */
7268 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7269 struct xdr_stream *xdr,
7270 void *data)
7271 {
7272 struct nfs4_secinfo_res *res = data;
7273 struct compound_hdr hdr;
7274 int status;
7275
7276 status = decode_compound_hdr(xdr, &hdr);
7277 if (status)
7278 goto out;
7279 status = decode_sequence(xdr, &res->seq_res, rqstp);
7280 if (status)
7281 goto out;
7282 status = decode_putrootfh(xdr);
7283 if (status)
7284 goto out;
7285 status = decode_secinfo_no_name(xdr, res);
7286 out:
7287 return status;
7288 }
7289
7290 /*
7291 * Decode TEST_STATEID response
7292 */
7293 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7294 struct xdr_stream *xdr,
7295 void *data)
7296 {
7297 struct nfs41_test_stateid_res *res = data;
7298 struct compound_hdr hdr;
7299 int status;
7300
7301 status = decode_compound_hdr(xdr, &hdr);
7302 if (status)
7303 goto out;
7304 status = decode_sequence(xdr, &res->seq_res, rqstp);
7305 if (status)
7306 goto out;
7307 status = decode_test_stateid(xdr, res);
7308 out:
7309 return status;
7310 }
7311
7312 /*
7313 * Decode FREE_STATEID response
7314 */
7315 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7316 struct xdr_stream *xdr,
7317 void *data)
7318 {
7319 struct nfs41_free_stateid_res *res = data;
7320 struct compound_hdr hdr;
7321 int status;
7322
7323 status = decode_compound_hdr(xdr, &hdr);
7324 if (status)
7325 goto out;
7326 status = decode_sequence(xdr, &res->seq_res, rqstp);
7327 if (status)
7328 goto out;
7329 status = decode_free_stateid(xdr, res);
7330 out:
7331 return status;
7332 }
7333 #endif /* CONFIG_NFS_V4_1 */
7334
7335 /**
7336 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7337 * the local page cache.
7338 * @xdr: XDR stream where entry resides
7339 * @entry: buffer to fill in with entry data
7340 * @plus: boolean indicating whether this should be a readdirplus entry
7341 *
7342 * Returns zero if successful, otherwise a negative errno value is
7343 * returned.
7344 *
7345 * This function is not invoked during READDIR reply decoding, but
7346 * rather whenever an application invokes the getdents(2) system call
7347 * on a directory already in our cache.
7348 */
7349 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7350 bool plus)
7351 {
7352 unsigned int savep;
7353 uint32_t bitmap[3] = {0};
7354 uint32_t len;
7355 uint64_t new_cookie;
7356 __be32 *p = xdr_inline_decode(xdr, 4);
7357 if (unlikely(!p))
7358 return -EAGAIN;
7359 if (*p == xdr_zero) {
7360 p = xdr_inline_decode(xdr, 4);
7361 if (unlikely(!p))
7362 return -EAGAIN;
7363 if (*p == xdr_zero)
7364 return -EAGAIN;
7365 entry->eof = 1;
7366 return -EBADCOOKIE;
7367 }
7368
7369 p = xdr_inline_decode(xdr, 12);
7370 if (unlikely(!p))
7371 return -EAGAIN;
7372 p = xdr_decode_hyper(p, &new_cookie);
7373 entry->len = be32_to_cpup(p);
7374
7375 p = xdr_inline_decode(xdr, entry->len);
7376 if (unlikely(!p))
7377 return -EAGAIN;
7378 entry->name = (const char *) p;
7379
7380 /*
7381 * In case the server doesn't return an inode number,
7382 * we fake one here. (We don't use inode number 0,
7383 * since glibc seems to choke on it...)
7384 */
7385 entry->ino = 1;
7386 entry->fattr->valid = 0;
7387
7388 if (decode_attr_bitmap(xdr, bitmap) < 0)
7389 return -EAGAIN;
7390
7391 if (decode_attr_length(xdr, &len, &savep) < 0)
7392 return -EAGAIN;
7393
7394 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7395 NULL, entry->label, entry->server) < 0)
7396 return -EAGAIN;
7397 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7398 entry->ino = entry->fattr->mounted_on_fileid;
7399 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7400 entry->ino = entry->fattr->fileid;
7401
7402 entry->d_type = DT_UNKNOWN;
7403 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7404 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7405
7406 entry->prev_cookie = entry->cookie;
7407 entry->cookie = new_cookie;
7408
7409 return 0;
7410 }
7411
7412 /*
7413 * We need to translate between nfs status return values and
7414 * the local errno values which may not be the same.
7415 */
7416 static struct {
7417 int stat;
7418 int errno;
7419 } nfs_errtbl[] = {
7420 { NFS4_OK, 0 },
7421 { NFS4ERR_PERM, -EPERM },
7422 { NFS4ERR_NOENT, -ENOENT },
7423 { NFS4ERR_IO, -errno_NFSERR_IO},
7424 { NFS4ERR_NXIO, -ENXIO },
7425 { NFS4ERR_ACCESS, -EACCES },
7426 { NFS4ERR_EXIST, -EEXIST },
7427 { NFS4ERR_XDEV, -EXDEV },
7428 { NFS4ERR_NOTDIR, -ENOTDIR },
7429 { NFS4ERR_ISDIR, -EISDIR },
7430 { NFS4ERR_INVAL, -EINVAL },
7431 { NFS4ERR_FBIG, -EFBIG },
7432 { NFS4ERR_NOSPC, -ENOSPC },
7433 { NFS4ERR_ROFS, -EROFS },
7434 { NFS4ERR_MLINK, -EMLINK },
7435 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7436 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7437 { NFS4ERR_DQUOT, -EDQUOT },
7438 { NFS4ERR_STALE, -ESTALE },
7439 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7440 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7441 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7442 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7443 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7444 { NFS4ERR_BADTYPE, -EBADTYPE },
7445 { NFS4ERR_LOCKED, -EAGAIN },
7446 { NFS4ERR_SYMLINK, -ELOOP },
7447 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7448 { NFS4ERR_DEADLOCK, -EDEADLK },
7449 { -1, -EIO }
7450 };
7451
7452 /*
7453 * Convert an NFS error code to a local one.
7454 * This one is used jointly by NFSv2 and NFSv3.
7455 */
7456 static int
7457 nfs4_stat_to_errno(int stat)
7458 {
7459 int i;
7460 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7461 if (nfs_errtbl[i].stat == stat)
7462 return nfs_errtbl[i].errno;
7463 }
7464 if (stat <= 10000 || stat > 10100) {
7465 /* The server is looney tunes. */
7466 return -EREMOTEIO;
7467 }
7468 /* If we cannot translate the error, the recovery routines should
7469 * handle it.
7470 * Note: remaining NFSv4 error codes have values > 10000, so should
7471 * not conflict with native Linux error codes.
7472 */
7473 return -stat;
7474 }
7475
7476 #ifdef CONFIG_NFS_V4_2
7477 #include "nfs42xdr.c"
7478 #endif /* CONFIG_NFS_V4_2 */
7479
7480 #define PROC(proc, argtype, restype) \
7481 [NFSPROC4_CLNT_##proc] = { \
7482 .p_proc = NFSPROC4_COMPOUND, \
7483 .p_encode = nfs4_xdr_##argtype, \
7484 .p_decode = nfs4_xdr_##restype, \
7485 .p_arglen = NFS4_##argtype##_sz, \
7486 .p_replen = NFS4_##restype##_sz, \
7487 .p_statidx = NFSPROC4_CLNT_##proc, \
7488 .p_name = #proc, \
7489 }
7490
7491 #define STUB(proc) \
7492 [NFSPROC4_CLNT_##proc] = { \
7493 .p_name = #proc, \
7494 }
7495
7496 #if defined(CONFIG_NFS_V4_1)
7497 #define PROC41(proc, argtype, restype) \
7498 PROC(proc, argtype, restype)
7499 #else
7500 #define PROC41(proc, argtype, restype) \
7501 STUB(proc)
7502 #endif
7503
7504 #if defined(CONFIG_NFS_V4_2)
7505 #define PROC42(proc, argtype, restype) \
7506 PROC(proc, argtype, restype)
7507 #else
7508 #define PROC42(proc, argtype, restype) \
7509 STUB(proc)
7510 #endif
7511
7512 const struct rpc_procinfo nfs4_procedures[] = {
7513 PROC(READ, enc_read, dec_read),
7514 PROC(WRITE, enc_write, dec_write),
7515 PROC(COMMIT, enc_commit, dec_commit),
7516 PROC(OPEN, enc_open, dec_open),
7517 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7518 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7519 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7520 PROC(CLOSE, enc_close, dec_close),
7521 PROC(SETATTR, enc_setattr, dec_setattr),
7522 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7523 PROC(RENEW, enc_renew, dec_renew),
7524 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7525 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7526 PROC(LOCK, enc_lock, dec_lock),
7527 PROC(LOCKT, enc_lockt, dec_lockt),
7528 PROC(LOCKU, enc_locku, dec_locku),
7529 PROC(ACCESS, enc_access, dec_access),
7530 PROC(GETATTR, enc_getattr, dec_getattr),
7531 PROC(LOOKUP, enc_lookup, dec_lookup),
7532 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7533 PROC(REMOVE, enc_remove, dec_remove),
7534 PROC(RENAME, enc_rename, dec_rename),
7535 PROC(LINK, enc_link, dec_link),
7536 PROC(SYMLINK, enc_symlink, dec_symlink),
7537 PROC(CREATE, enc_create, dec_create),
7538 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7539 PROC(STATFS, enc_statfs, dec_statfs),
7540 PROC(READLINK, enc_readlink, dec_readlink),
7541 PROC(READDIR, enc_readdir, dec_readdir),
7542 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7543 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7544 PROC(GETACL, enc_getacl, dec_getacl),
7545 PROC(SETACL, enc_setacl, dec_setacl),
7546 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7547 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7548 PROC(SECINFO, enc_secinfo, dec_secinfo),
7549 PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present),
7550 PROC41(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7551 PROC41(CREATE_SESSION, enc_create_session, dec_create_session),
7552 PROC41(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7553 PROC41(SEQUENCE, enc_sequence, dec_sequence),
7554 PROC41(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7555 PROC41(RECLAIM_COMPLETE,enc_reclaim_complete, dec_reclaim_complete),
7556 PROC41(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7557 PROC41(LAYOUTGET, enc_layoutget, dec_layoutget),
7558 PROC41(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7559 PROC41(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7560 PROC41(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7561 PROC41(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7562 PROC41(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7563 STUB(GETDEVICELIST),
7564 PROC41(BIND_CONN_TO_SESSION,
7565 enc_bind_conn_to_session, dec_bind_conn_to_session),
7566 PROC41(DESTROY_CLIENTID,enc_destroy_clientid, dec_destroy_clientid),
7567 PROC42(SEEK, enc_seek, dec_seek),
7568 PROC42(ALLOCATE, enc_allocate, dec_allocate),
7569 PROC42(DEALLOCATE, enc_deallocate, dec_deallocate),
7570 PROC42(LAYOUTSTATS, enc_layoutstats, dec_layoutstats),
7571 PROC42(CLONE, enc_clone, dec_clone),
7572 PROC42(COPY, enc_copy, dec_copy),
7573 PROC42(OFFLOAD_CANCEL, enc_offload_cancel, dec_offload_cancel),
7574 PROC(LOOKUPP, enc_lookupp, dec_lookupp),
7575 PROC42(LAYOUTERROR, enc_layouterror, dec_layouterror),
7576 };
7577
7578 static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7579 const struct rpc_version nfs_version4 = {
7580 .number = 4,
7581 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7582 .procs = nfs4_procedures,
7583 .counts = nfs_version4_counts,
7584 };
7585
7586 /*
7587 * Local variables:
7588 * c-basic-offset: 8
7589 * End:
7590 */
Linux with added FPC-III support