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usb: gadget: udc: pch_udc: Fix a plethora of function documentation related issues
[linux/fpc-iii.git] / fs / nfs / nfs4xdr.c
blob47817ef0aadb1558d5c92b48d4e2ee7479f5abd9
1 /*
2 * fs/nfs/nfs4xdr.c
3 *
4 * Client-side XDR for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <linux/param.h>
39 #include <linux/time.h>
40 #include <linux/mm.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/in.h>
44 #include <linux/pagemap.h>
45 #include <linux/proc_fs.h>
46 #include <linux/kdev_t.h>
47 #include <linux/module.h>
48 #include <linux/utsname.h>
49 #include <linux/sunrpc/clnt.h>
50 #include <linux/sunrpc/msg_prot.h>
51 #include <linux/sunrpc/gss_api.h>
52 #include <linux/nfs.h>
53 #include <linux/nfs4.h>
54 #include <linux/nfs_fs.h>
55
56 #include "nfs4_fs.h"
57 #include "nfs4trace.h"
58 #include "internal.h"
59 #include "nfs4idmap.h"
60 #include "nfs4session.h"
61 #include "pnfs.h"
62 #include "netns.h"
63
64 #define NFSDBG_FACILITY NFSDBG_XDR
65
66 /* Mapping from NFS error code to "errno" error code. */
67 #define errno_NFSERR_IO EIO
68
69 struct compound_hdr;
70 static int nfs4_stat_to_errno(int);
71 static void encode_layoutget(struct xdr_stream *xdr,
72 const struct nfs4_layoutget_args *args,
73 struct compound_hdr *hdr);
74 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
75 struct nfs4_layoutget_res *res);
76
77 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
78 #ifdef DEBUG
79 #define NFS4_MAXTAGLEN 20
80 #else
81 #define NFS4_MAXTAGLEN 0
82 #endif
83
84 /* lock,open owner id:
85 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
86 */
87 #define open_owner_id_maxsz (1 + 2 + 1 + 1 + 2)
88 #define lock_owner_id_maxsz (1 + 1 + 4)
89 #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
90 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
91 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
92 #define op_encode_hdr_maxsz (1)
93 #define op_decode_hdr_maxsz (2)
94 #define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
95 #define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
96 #define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
97 #define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
98 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
99 (NFS4_FHSIZE >> 2))
100 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
101 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
102 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
103 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
104 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
105 ((3+NFS4_FHSIZE) >> 2))
106 #define nfs4_fattr_bitmap_maxsz 4
107 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
108 #define nfstime4_maxsz (3)
109 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
110 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
111 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
112 #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
113 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
114 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
115 #define nfs4_label_maxsz (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
116 #else
117 #define nfs4_label_maxsz 0
118 #endif
119 /* We support only one layout type per file system */
120 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
121 /* This is based on getfattr, which uses the most attributes: */
122 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
123 3*nfstime4_maxsz + \
124 nfs4_owner_maxsz + \
125 nfs4_group_maxsz + nfs4_label_maxsz + \
126 decode_mdsthreshold_maxsz))
127 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
128 nfs4_fattr_value_maxsz)
129 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
130 #define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
131 1 + 2 + 1 + \
132 nfs4_owner_maxsz + \
133 nfs4_group_maxsz + \
134 nfs4_label_maxsz + \
135 1 + nfstime4_maxsz + \
136 1 + nfstime4_maxsz)
137 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
138 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
139 #define encode_restorefh_maxsz (op_encode_hdr_maxsz)
140 #define decode_restorefh_maxsz (op_decode_hdr_maxsz)
141 #define encode_fsinfo_maxsz (encode_getattr_maxsz)
142 /* The 5 accounts for the PNFS attributes, and assumes that at most three
143 * layout types will be returned.
144 */
145 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + \
146 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
147 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
148 #define decode_renew_maxsz (op_decode_hdr_maxsz)
149 #define encode_setclientid_maxsz \
150 (op_encode_hdr_maxsz + \
151 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
152 /* client name */ \
153 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
154 1 /* sc_prog */ + \
155 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
156 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
157 1) /* sc_cb_ident */
158 #define decode_setclientid_maxsz \
159 (op_decode_hdr_maxsz + \
160 2 /* clientid */ + \
161 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
162 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
163 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
164 #define encode_setclientid_confirm_maxsz \
165 (op_encode_hdr_maxsz + \
166 3 + (NFS4_VERIFIER_SIZE >> 2))
167 #define decode_setclientid_confirm_maxsz \
168 (op_decode_hdr_maxsz)
169 #define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
170 #define decode_lookup_maxsz (op_decode_hdr_maxsz)
171 #define encode_lookupp_maxsz (op_encode_hdr_maxsz)
172 #define decode_lookupp_maxsz (op_decode_hdr_maxsz)
173 #define encode_share_access_maxsz \
174 (2)
175 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
176 #define encode_opentype_maxsz (1 + encode_createmode_maxsz)
177 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
178 #define encode_open_maxsz (op_encode_hdr_maxsz + \
179 2 + encode_share_access_maxsz + 2 + \
180 open_owner_id_maxsz + \
181 encode_opentype_maxsz + \
182 encode_claim_null_maxsz)
183 #define decode_space_limit_maxsz (3)
184 #define decode_ace_maxsz (3 + nfs4_owner_maxsz)
185 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
186 decode_space_limit_maxsz + \
187 decode_ace_maxsz)
188 #define decode_change_info_maxsz (5)
189 #define decode_open_maxsz (op_decode_hdr_maxsz + \
190 decode_stateid_maxsz + \
191 decode_change_info_maxsz + 1 + \
192 nfs4_fattr_bitmap_maxsz + \
193 decode_delegation_maxsz)
194 #define encode_open_confirm_maxsz \
195 (op_encode_hdr_maxsz + \
196 encode_stateid_maxsz + 1)
197 #define decode_open_confirm_maxsz \
198 (op_decode_hdr_maxsz + \
199 decode_stateid_maxsz)
200 #define encode_open_downgrade_maxsz \
201 (op_encode_hdr_maxsz + \
202 encode_stateid_maxsz + 1 + \
203 encode_share_access_maxsz)
204 #define decode_open_downgrade_maxsz \
205 (op_decode_hdr_maxsz + \
206 decode_stateid_maxsz)
207 #define encode_close_maxsz (op_encode_hdr_maxsz + \
208 1 + encode_stateid_maxsz)
209 #define decode_close_maxsz (op_decode_hdr_maxsz + \
210 decode_stateid_maxsz)
211 #define encode_setattr_maxsz (op_encode_hdr_maxsz + \
212 encode_stateid_maxsz + \
213 encode_attrs_maxsz)
214 #define decode_setattr_maxsz (op_decode_hdr_maxsz + \
215 nfs4_fattr_bitmap_maxsz)
216 #define encode_read_maxsz (op_encode_hdr_maxsz + \
217 encode_stateid_maxsz + 3)
218 #define decode_read_maxsz (op_decode_hdr_maxsz + 2 + 1)
219 #define encode_readdir_maxsz (op_encode_hdr_maxsz + \
220 2 + encode_verifier_maxsz + 5 + \
221 nfs4_label_maxsz)
222 #define decode_readdir_maxsz (op_decode_hdr_maxsz + \
223 decode_verifier_maxsz + 1)
224 #define encode_readlink_maxsz (op_encode_hdr_maxsz)
225 #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1 + 1)
226 #define encode_write_maxsz (op_encode_hdr_maxsz + \
227 encode_stateid_maxsz + 4)
228 #define decode_write_maxsz (op_decode_hdr_maxsz + \
229 2 + decode_verifier_maxsz)
230 #define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
231 #define decode_commit_maxsz (op_decode_hdr_maxsz + \
232 decode_verifier_maxsz)
233 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
234 nfs4_name_maxsz)
235 #define decode_remove_maxsz (op_decode_hdr_maxsz + \
236 decode_change_info_maxsz)
237 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
238 2 * nfs4_name_maxsz)
239 #define decode_rename_maxsz (op_decode_hdr_maxsz + \
240 decode_change_info_maxsz + \
241 decode_change_info_maxsz)
242 #define encode_link_maxsz (op_encode_hdr_maxsz + \
243 nfs4_name_maxsz)
244 #define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
245 #define encode_lockowner_maxsz (7)
246 #define encode_lock_maxsz (op_encode_hdr_maxsz + \
247 7 + \
248 1 + encode_stateid_maxsz + 1 + \
249 encode_lockowner_maxsz)
250 #define decode_lock_denied_maxsz \
251 (8 + decode_lockowner_maxsz)
252 #define decode_lock_maxsz (op_decode_hdr_maxsz + \
253 decode_lock_denied_maxsz)
254 #define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
255 encode_lockowner_maxsz)
256 #define decode_lockt_maxsz (op_decode_hdr_maxsz + \
257 decode_lock_denied_maxsz)
258 #define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
259 encode_stateid_maxsz + \
260 4)
261 #define decode_locku_maxsz (op_decode_hdr_maxsz + \
262 decode_stateid_maxsz)
263 #define encode_release_lockowner_maxsz \
264 (op_encode_hdr_maxsz + \
265 encode_lockowner_maxsz)
266 #define decode_release_lockowner_maxsz \
267 (op_decode_hdr_maxsz)
268 #define encode_access_maxsz (op_encode_hdr_maxsz + 1)
269 #define decode_access_maxsz (op_decode_hdr_maxsz + 2)
270 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
271 1 + nfs4_name_maxsz + \
272 1 + \
273 nfs4_fattr_maxsz)
274 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
275 #define encode_create_maxsz (op_encode_hdr_maxsz + \
276 1 + 2 + nfs4_name_maxsz + \
277 encode_attrs_maxsz)
278 #define decode_create_maxsz (op_decode_hdr_maxsz + \
279 decode_change_info_maxsz + \
280 nfs4_fattr_bitmap_maxsz)
281 #define encode_statfs_maxsz (encode_getattr_maxsz)
282 #define decode_statfs_maxsz (decode_getattr_maxsz)
283 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
284 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
285 #define encode_getacl_maxsz (encode_getattr_maxsz)
286 #define decode_getacl_maxsz (op_decode_hdr_maxsz + \
287 nfs4_fattr_bitmap_maxsz + 1 + 1)
288 #define encode_setacl_maxsz (op_encode_hdr_maxsz + \
289 encode_stateid_maxsz + 3)
290 #define decode_setacl_maxsz (decode_setattr_maxsz)
291 #define encode_fs_locations_maxsz \
292 (encode_getattr_maxsz)
293 #define decode_fs_locations_maxsz \
294 (1)
295 #define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
296 #define decode_secinfo_maxsz (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
297
298 #if defined(CONFIG_NFS_V4_1)
299 #define NFS4_MAX_MACHINE_NAME_LEN (64)
300 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
301 sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
302
303 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
304 encode_verifier_maxsz + \
305 1 /* co_ownerid.len */ + \
306 /* eia_clientowner */ \
307 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
308 1 /* flags */ + \
309 1 /* spa_how */ + \
310 /* max is SP4_MACH_CRED (for now) */ + \
311 1 + NFS4_OP_MAP_NUM_WORDS + \
312 1 + NFS4_OP_MAP_NUM_WORDS + \
313 1 /* implementation id array of size 1 */ + \
314 1 /* nii_domain */ + \
315 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
316 1 /* nii_name */ + \
317 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
318 3 /* nii_date */)
319 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
320 2 /* eir_clientid */ + \
321 1 /* eir_sequenceid */ + \
322 1 /* eir_flags */ + \
323 1 /* spr_how */ + \
324 /* max is SP4_MACH_CRED (for now) */ + \
325 1 + NFS4_OP_MAP_NUM_WORDS + \
326 1 + NFS4_OP_MAP_NUM_WORDS + \
327 2 /* eir_server_owner.so_minor_id */ + \
328 /* eir_server_owner.so_major_id<> */ \
329 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
330 /* eir_server_scope<> */ \
331 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
332 1 /* eir_server_impl_id array length */ + \
333 1 /* nii_domain */ + \
334 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
335 1 /* nii_name */ + \
336 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
337 3 /* nii_date */)
338 #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
339 #define decode_channel_attrs_maxsz (6 + \
340 1 /* ca_rdma_ird.len */ + \
341 1 /* ca_rdma_ird */)
342 #define encode_create_session_maxsz (op_encode_hdr_maxsz + \
343 2 /* csa_clientid */ + \
344 1 /* csa_sequence */ + \
345 1 /* csa_flags */ + \
346 encode_channel_attrs_maxsz + \
347 encode_channel_attrs_maxsz + \
348 1 /* csa_cb_program */ + \
349 1 /* csa_sec_parms.len (1) */ + \
350 1 /* cb_secflavor (AUTH_SYS) */ + \
351 1 /* stamp */ + \
352 1 /* machinename.len */ + \
353 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
354 1 /* uid */ + \
355 1 /* gid */ + \
356 1 /* gids.len (0) */)
357 #define decode_create_session_maxsz (op_decode_hdr_maxsz + \
358 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
359 1 /* csr_sequence */ + \
360 1 /* csr_flags */ + \
361 decode_channel_attrs_maxsz + \
362 decode_channel_attrs_maxsz)
363 #define encode_bind_conn_to_session_maxsz (op_encode_hdr_maxsz + \
364 /* bctsa_sessid */ \
365 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
366 1 /* bctsa_dir */ + \
367 1 /* bctsa_use_conn_in_rdma_mode */)
368 #define decode_bind_conn_to_session_maxsz (op_decode_hdr_maxsz + \
369 /* bctsr_sessid */ \
370 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
371 1 /* bctsr_dir */ + \
372 1 /* bctsr_use_conn_in_rdma_mode */)
373 #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
374 #define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
375 #define encode_destroy_clientid_maxsz (op_encode_hdr_maxsz + 2)
376 #define decode_destroy_clientid_maxsz (op_decode_hdr_maxsz)
377 #define encode_sequence_maxsz (op_encode_hdr_maxsz + \
378 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
379 #define decode_sequence_maxsz (op_decode_hdr_maxsz + \
380 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
381 #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
382 #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
383 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
384 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
385 1 /* layout type */ + \
386 1 /* maxcount */ + \
387 1 /* bitmap size */ + \
388 1 /* notification bitmap length */ + \
389 1 /* notification bitmap, word 0 */)
390 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
391 1 /* layout type */ + \
392 1 /* opaque devaddr4 length */ + \
393 /* devaddr4 payload is read into page */ \
394 1 /* notification bitmap length */ + \
395 1 /* notification bitmap, word 0 */ + \
396 1 /* possible XDR padding */)
397 #define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
398 encode_stateid_maxsz)
399 #define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
400 decode_stateid_maxsz + \
401 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE) + 1)
402 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
403 2 /* offset */ + \
404 2 /* length */ + \
405 1 /* reclaim */ + \
406 encode_stateid_maxsz + \
407 1 /* new offset (true) */ + \
408 2 /* last byte written */ + \
409 1 /* nt_timechanged (false) */ + \
410 1 /* layoutupdate4 layout type */ + \
411 1 /* layoutupdate4 opaqueue len */)
412 /* the actual content of layoutupdate4 should
413 be allocated by drivers and spliced in
414 using xdr_write_pages */
415 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
416 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
417 encode_stateid_maxsz + \
418 1 + \
419 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
420 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
421 1 + decode_stateid_maxsz)
422 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
423 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
424 #define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \
425 XDR_QUADLEN(NFS4_STATEID_SIZE))
426 #define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1)
427 #define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \
428 XDR_QUADLEN(NFS4_STATEID_SIZE))
429 #define decode_free_stateid_maxsz (op_decode_hdr_maxsz)
430 #else /* CONFIG_NFS_V4_1 */
431 #define encode_sequence_maxsz 0
432 #define decode_sequence_maxsz 0
433 #define encode_layoutreturn_maxsz 0
434 #define decode_layoutreturn_maxsz 0
435 #define encode_layoutget_maxsz 0
436 #define decode_layoutget_maxsz 0
437 #endif /* CONFIG_NFS_V4_1 */
438
439 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
440 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
441 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
442 encode_sequence_maxsz + \
443 encode_putfh_maxsz + \
444 encode_read_maxsz)
445 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
446 decode_sequence_maxsz + \
447 decode_putfh_maxsz + \
448 decode_read_maxsz)
449 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
450 encode_sequence_maxsz + \
451 encode_putfh_maxsz + \
452 encode_readlink_maxsz)
453 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
454 decode_sequence_maxsz + \
455 decode_putfh_maxsz + \
456 decode_readlink_maxsz)
457 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
458 encode_sequence_maxsz + \
459 encode_putfh_maxsz + \
460 encode_readdir_maxsz)
461 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
462 decode_sequence_maxsz + \
463 decode_putfh_maxsz + \
464 decode_readdir_maxsz)
465 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
466 encode_sequence_maxsz + \
467 encode_putfh_maxsz + \
468 encode_write_maxsz + \
469 encode_getattr_maxsz)
470 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
471 decode_sequence_maxsz + \
472 decode_putfh_maxsz + \
473 decode_write_maxsz + \
474 decode_getattr_maxsz)
475 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
476 encode_sequence_maxsz + \
477 encode_putfh_maxsz + \
478 encode_commit_maxsz)
479 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
480 decode_sequence_maxsz + \
481 decode_putfh_maxsz + \
482 decode_commit_maxsz)
483 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
484 encode_sequence_maxsz + \
485 encode_putfh_maxsz + \
486 encode_open_maxsz + \
487 encode_access_maxsz + \
488 encode_getfh_maxsz + \
489 encode_getattr_maxsz + \
490 encode_layoutget_maxsz)
491 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
492 decode_sequence_maxsz + \
493 decode_putfh_maxsz + \
494 decode_open_maxsz + \
495 decode_access_maxsz + \
496 decode_getfh_maxsz + \
497 decode_getattr_maxsz + \
498 decode_layoutget_maxsz)
499 #define NFS4_enc_open_confirm_sz \
500 (compound_encode_hdr_maxsz + \
501 encode_putfh_maxsz + \
502 encode_open_confirm_maxsz)
503 #define NFS4_dec_open_confirm_sz \
504 (compound_decode_hdr_maxsz + \
505 decode_putfh_maxsz + \
506 decode_open_confirm_maxsz)
507 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
508 encode_sequence_maxsz + \
509 encode_putfh_maxsz + \
510 encode_open_maxsz + \
511 encode_access_maxsz + \
512 encode_getattr_maxsz + \
513 encode_layoutget_maxsz)
514 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
515 decode_sequence_maxsz + \
516 decode_putfh_maxsz + \
517 decode_open_maxsz + \
518 decode_access_maxsz + \
519 decode_getattr_maxsz + \
520 decode_layoutget_maxsz)
521 #define NFS4_enc_open_downgrade_sz \
522 (compound_encode_hdr_maxsz + \
523 encode_sequence_maxsz + \
524 encode_putfh_maxsz + \
525 encode_layoutreturn_maxsz + \
526 encode_open_downgrade_maxsz)
527 #define NFS4_dec_open_downgrade_sz \
528 (compound_decode_hdr_maxsz + \
529 decode_sequence_maxsz + \
530 decode_putfh_maxsz + \
531 decode_layoutreturn_maxsz + \
532 decode_open_downgrade_maxsz)
533 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
534 encode_sequence_maxsz + \
535 encode_putfh_maxsz + \
536 encode_layoutreturn_maxsz + \
537 encode_close_maxsz + \
538 encode_getattr_maxsz)
539 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
540 decode_sequence_maxsz + \
541 decode_putfh_maxsz + \
542 decode_layoutreturn_maxsz + \
543 decode_close_maxsz + \
544 decode_getattr_maxsz)
545 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
546 encode_sequence_maxsz + \
547 encode_putfh_maxsz + \
548 encode_setattr_maxsz + \
549 encode_getattr_maxsz)
550 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
551 decode_sequence_maxsz + \
552 decode_putfh_maxsz + \
553 decode_setattr_maxsz + \
554 decode_getattr_maxsz)
555 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
556 encode_sequence_maxsz + \
557 encode_putfh_maxsz + \
558 encode_fsinfo_maxsz)
559 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
560 decode_sequence_maxsz + \
561 decode_putfh_maxsz + \
562 decode_fsinfo_maxsz)
563 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
564 encode_renew_maxsz)
565 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
566 decode_renew_maxsz)
567 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
568 encode_setclientid_maxsz)
569 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
570 decode_setclientid_maxsz)
571 #define NFS4_enc_setclientid_confirm_sz \
572 (compound_encode_hdr_maxsz + \
573 encode_setclientid_confirm_maxsz)
574 #define NFS4_dec_setclientid_confirm_sz \
575 (compound_decode_hdr_maxsz + \
576 decode_setclientid_confirm_maxsz)
577 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
578 encode_sequence_maxsz + \
579 encode_putfh_maxsz + \
580 encode_lock_maxsz)
581 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
582 decode_sequence_maxsz + \
583 decode_putfh_maxsz + \
584 decode_lock_maxsz)
585 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
586 encode_sequence_maxsz + \
587 encode_putfh_maxsz + \
588 encode_lockt_maxsz)
589 #define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
590 decode_sequence_maxsz + \
591 decode_putfh_maxsz + \
592 decode_lockt_maxsz)
593 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
594 encode_sequence_maxsz + \
595 encode_putfh_maxsz + \
596 encode_locku_maxsz)
597 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
598 decode_sequence_maxsz + \
599 decode_putfh_maxsz + \
600 decode_locku_maxsz)
601 #define NFS4_enc_release_lockowner_sz \
602 (compound_encode_hdr_maxsz + \
603 encode_lockowner_maxsz)
604 #define NFS4_dec_release_lockowner_sz \
605 (compound_decode_hdr_maxsz + \
606 decode_lockowner_maxsz)
607 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
608 encode_sequence_maxsz + \
609 encode_putfh_maxsz + \
610 encode_access_maxsz + \
611 encode_getattr_maxsz)
612 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
613 decode_sequence_maxsz + \
614 decode_putfh_maxsz + \
615 decode_access_maxsz + \
616 decode_getattr_maxsz)
617 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
618 encode_sequence_maxsz + \
619 encode_putfh_maxsz + \
620 encode_getattr_maxsz + \
621 encode_renew_maxsz)
622 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
623 decode_sequence_maxsz + \
624 decode_putfh_maxsz + \
625 decode_getattr_maxsz + \
626 decode_renew_maxsz)
627 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
628 encode_sequence_maxsz + \
629 encode_putfh_maxsz + \
630 encode_lookup_maxsz + \
631 encode_getattr_maxsz + \
632 encode_getfh_maxsz)
633 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
634 decode_sequence_maxsz + \
635 decode_putfh_maxsz + \
636 decode_lookup_maxsz + \
637 decode_getattr_maxsz + \
638 decode_getfh_maxsz)
639 #define NFS4_enc_lookupp_sz (compound_encode_hdr_maxsz + \
640 encode_sequence_maxsz + \
641 encode_putfh_maxsz + \
642 encode_lookupp_maxsz + \
643 encode_getattr_maxsz + \
644 encode_getfh_maxsz)
645 #define NFS4_dec_lookupp_sz (compound_decode_hdr_maxsz + \
646 decode_sequence_maxsz + \
647 decode_putfh_maxsz + \
648 decode_lookupp_maxsz + \
649 decode_getattr_maxsz + \
650 decode_getfh_maxsz)
651 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
652 encode_sequence_maxsz + \
653 encode_putrootfh_maxsz + \
654 encode_getattr_maxsz + \
655 encode_getfh_maxsz)
656 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
657 decode_sequence_maxsz + \
658 decode_putrootfh_maxsz + \
659 decode_getattr_maxsz + \
660 decode_getfh_maxsz)
661 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
662 encode_sequence_maxsz + \
663 encode_putfh_maxsz + \
664 encode_remove_maxsz)
665 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
666 decode_sequence_maxsz + \
667 decode_putfh_maxsz + \
668 decode_remove_maxsz)
669 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
670 encode_sequence_maxsz + \
671 encode_putfh_maxsz + \
672 encode_savefh_maxsz + \
673 encode_putfh_maxsz + \
674 encode_rename_maxsz)
675 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
676 decode_sequence_maxsz + \
677 decode_putfh_maxsz + \
678 decode_savefh_maxsz + \
679 decode_putfh_maxsz + \
680 decode_rename_maxsz)
681 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
682 encode_sequence_maxsz + \
683 encode_putfh_maxsz + \
684 encode_savefh_maxsz + \
685 encode_putfh_maxsz + \
686 encode_link_maxsz + \
687 encode_restorefh_maxsz + \
688 encode_getattr_maxsz)
689 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
690 decode_sequence_maxsz + \
691 decode_putfh_maxsz + \
692 decode_savefh_maxsz + \
693 decode_putfh_maxsz + \
694 decode_link_maxsz + \
695 decode_restorefh_maxsz + \
696 decode_getattr_maxsz)
697 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
698 encode_sequence_maxsz + \
699 encode_putfh_maxsz + \
700 encode_symlink_maxsz + \
701 encode_getattr_maxsz + \
702 encode_getfh_maxsz)
703 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
704 decode_sequence_maxsz + \
705 decode_putfh_maxsz + \
706 decode_symlink_maxsz + \
707 decode_getattr_maxsz + \
708 decode_getfh_maxsz)
709 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
710 encode_sequence_maxsz + \
711 encode_putfh_maxsz + \
712 encode_create_maxsz + \
713 encode_getfh_maxsz + \
714 encode_getattr_maxsz)
715 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
716 decode_sequence_maxsz + \
717 decode_putfh_maxsz + \
718 decode_create_maxsz + \
719 decode_getfh_maxsz + \
720 decode_getattr_maxsz)
721 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
722 encode_sequence_maxsz + \
723 encode_putfh_maxsz + \
724 encode_getattr_maxsz)
725 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
726 decode_sequence_maxsz + \
727 decode_putfh_maxsz + \
728 decode_getattr_maxsz)
729 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
730 encode_sequence_maxsz + \
731 encode_putfh_maxsz + \
732 encode_statfs_maxsz)
733 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
734 decode_sequence_maxsz + \
735 decode_putfh_maxsz + \
736 decode_statfs_maxsz)
737 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
738 encode_sequence_maxsz + \
739 encode_putfh_maxsz + \
740 encode_getattr_maxsz)
741 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
742 decode_sequence_maxsz + \
743 decode_putfh_maxsz + \
744 decode_getattr_maxsz)
745 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
746 encode_sequence_maxsz + \
747 encode_putfh_maxsz + \
748 encode_layoutreturn_maxsz + \
749 encode_delegreturn_maxsz + \
750 encode_getattr_maxsz)
751 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
752 decode_sequence_maxsz + \
753 decode_putfh_maxsz + \
754 decode_layoutreturn_maxsz + \
755 decode_delegreturn_maxsz + \
756 decode_getattr_maxsz)
757 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
758 encode_sequence_maxsz + \
759 encode_putfh_maxsz + \
760 encode_getacl_maxsz)
761 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
762 decode_sequence_maxsz + \
763 decode_putfh_maxsz + \
764 decode_getacl_maxsz)
765 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
766 encode_sequence_maxsz + \
767 encode_putfh_maxsz + \
768 encode_setacl_maxsz)
769 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
770 decode_sequence_maxsz + \
771 decode_putfh_maxsz + \
772 decode_setacl_maxsz)
773 #define NFS4_enc_fs_locations_sz \
774 (compound_encode_hdr_maxsz + \
775 encode_sequence_maxsz + \
776 encode_putfh_maxsz + \
777 encode_lookup_maxsz + \
778 encode_fs_locations_maxsz + \
779 encode_renew_maxsz)
780 #define NFS4_dec_fs_locations_sz \
781 (compound_decode_hdr_maxsz + \
782 decode_sequence_maxsz + \
783 decode_putfh_maxsz + \
784 decode_lookup_maxsz + \
785 decode_fs_locations_maxsz + \
786 decode_renew_maxsz)
787 #define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
788 encode_sequence_maxsz + \
789 encode_putfh_maxsz + \
790 encode_secinfo_maxsz)
791 #define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
792 decode_sequence_maxsz + \
793 decode_putfh_maxsz + \
794 decode_secinfo_maxsz)
795 #define NFS4_enc_fsid_present_sz \
796 (compound_encode_hdr_maxsz + \
797 encode_sequence_maxsz + \
798 encode_putfh_maxsz + \
799 encode_getfh_maxsz + \
800 encode_renew_maxsz)
801 #define NFS4_dec_fsid_present_sz \
802 (compound_decode_hdr_maxsz + \
803 decode_sequence_maxsz + \
804 decode_putfh_maxsz + \
805 decode_getfh_maxsz + \
806 decode_renew_maxsz)
807 #if defined(CONFIG_NFS_V4_1)
808 #define NFS4_enc_bind_conn_to_session_sz \
809 (compound_encode_hdr_maxsz + \
810 encode_bind_conn_to_session_maxsz)
811 #define NFS4_dec_bind_conn_to_session_sz \
812 (compound_decode_hdr_maxsz + \
813 decode_bind_conn_to_session_maxsz)
814 #define NFS4_enc_exchange_id_sz \
815 (compound_encode_hdr_maxsz + \
816 encode_exchange_id_maxsz)
817 #define NFS4_dec_exchange_id_sz \
818 (compound_decode_hdr_maxsz + \
819 decode_exchange_id_maxsz)
820 #define NFS4_enc_create_session_sz \
821 (compound_encode_hdr_maxsz + \
822 encode_create_session_maxsz)
823 #define NFS4_dec_create_session_sz \
824 (compound_decode_hdr_maxsz + \
825 decode_create_session_maxsz)
826 #define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
827 encode_destroy_session_maxsz)
828 #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
829 decode_destroy_session_maxsz)
830 #define NFS4_enc_destroy_clientid_sz (compound_encode_hdr_maxsz + \
831 encode_destroy_clientid_maxsz)
832 #define NFS4_dec_destroy_clientid_sz (compound_decode_hdr_maxsz + \
833 decode_destroy_clientid_maxsz)
834 #define NFS4_enc_sequence_sz \
835 (compound_decode_hdr_maxsz + \
836 encode_sequence_maxsz)
837 #define NFS4_dec_sequence_sz \
838 (compound_decode_hdr_maxsz + \
839 decode_sequence_maxsz)
840 #endif
841 #define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
842 encode_sequence_maxsz + \
843 encode_putrootfh_maxsz + \
844 encode_fsinfo_maxsz)
845 #define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
846 decode_sequence_maxsz + \
847 decode_putrootfh_maxsz + \
848 decode_fsinfo_maxsz)
849 #if defined(CONFIG_NFS_V4_1)
850 #define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
851 encode_sequence_maxsz + \
852 encode_reclaim_complete_maxsz)
853 #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
854 decode_sequence_maxsz + \
855 decode_reclaim_complete_maxsz)
856 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
857 encode_sequence_maxsz +\
858 encode_getdeviceinfo_maxsz)
859 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
860 decode_sequence_maxsz + \
861 decode_getdeviceinfo_maxsz)
862 #define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
863 encode_sequence_maxsz + \
864 encode_putfh_maxsz + \
865 encode_layoutget_maxsz)
866 #define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
867 decode_sequence_maxsz + \
868 decode_putfh_maxsz + \
869 decode_layoutget_maxsz)
870 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
871 encode_sequence_maxsz +\
872 encode_putfh_maxsz + \
873 encode_layoutcommit_maxsz + \
874 encode_getattr_maxsz)
875 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
876 decode_sequence_maxsz + \
877 decode_putfh_maxsz + \
878 decode_layoutcommit_maxsz + \
879 decode_getattr_maxsz)
880 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
881 encode_sequence_maxsz + \
882 encode_putfh_maxsz + \
883 encode_layoutreturn_maxsz)
884 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
885 decode_sequence_maxsz + \
886 decode_putfh_maxsz + \
887 decode_layoutreturn_maxsz)
888 #define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
889 encode_sequence_maxsz + \
890 encode_putrootfh_maxsz +\
891 encode_secinfo_no_name_maxsz)
892 #define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
893 decode_sequence_maxsz + \
894 decode_putrootfh_maxsz + \
895 decode_secinfo_no_name_maxsz)
896 #define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
897 encode_sequence_maxsz + \
898 encode_test_stateid_maxsz)
899 #define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
900 decode_sequence_maxsz + \
901 decode_test_stateid_maxsz)
902 #define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \
903 encode_sequence_maxsz + \
904 encode_free_stateid_maxsz)
905 #define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
906 decode_sequence_maxsz + \
907 decode_free_stateid_maxsz)
908
909 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
910 compound_encode_hdr_maxsz +
911 encode_sequence_maxsz +
912 encode_putfh_maxsz +
913 encode_getattr_maxsz) *
914 XDR_UNIT);
915
916 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
917 compound_decode_hdr_maxsz +
918 decode_sequence_maxsz +
919 decode_putfh_maxsz) *
920 XDR_UNIT);
921
922 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
923 compound_decode_hdr_maxsz +
924 decode_sequence_maxsz) *
925 XDR_UNIT);
926 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
927 #endif /* CONFIG_NFS_V4_1 */
928
929 static const umode_t nfs_type2fmt[] = {
930 [NF4BAD] = 0,
931 [NF4REG] = S_IFREG,
932 [NF4DIR] = S_IFDIR,
933 [NF4BLK] = S_IFBLK,
934 [NF4CHR] = S_IFCHR,
935 [NF4LNK] = S_IFLNK,
936 [NF4SOCK] = S_IFSOCK,
937 [NF4FIFO] = S_IFIFO,
938 [NF4ATTRDIR] = 0,
939 [NF4NAMEDATTR] = 0,
940 };
941
942 struct compound_hdr {
943 int32_t status;
944 uint32_t nops;
945 __be32 * nops_p;
946 uint32_t taglen;
947 char * tag;
948 uint32_t replen; /* expected reply words */
949 u32 minorversion;
950 };
951
952 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
953 {
954 __be32 *p = xdr_reserve_space(xdr, nbytes);
955 BUG_ON(!p);
956 return p;
957 }
958
959 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
960 {
961 WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
962 }
963
964 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
965 {
966 WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0);
967 }
968
969 static void encode_uint32(struct xdr_stream *xdr, u32 n)
970 {
971 WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
972 }
973
974 static void encode_uint64(struct xdr_stream *xdr, u64 n)
975 {
976 WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0);
977 }
978
979 static ssize_t xdr_encode_bitmap4(struct xdr_stream *xdr,
980 const __u32 *bitmap, size_t len)
981 {
982 ssize_t ret;
983
984 /* Trim empty words */
985 while (len > 0 && bitmap[len-1] == 0)
986 len--;
987 ret = xdr_stream_encode_uint32_array(xdr, bitmap, len);
988 if (WARN_ON_ONCE(ret < 0))
989 return ret;
990 return len;
991 }
992
993 static size_t mask_bitmap4(const __u32 *bitmap, const __u32 *mask,
994 __u32 *res, size_t len)
995 {
996 size_t i;
997 __u32 tmp;
998
999 while (len > 0 && (bitmap[len-1] == 0 || mask[len-1] == 0))
1000 len--;
1001 for (i = len; i-- > 0;) {
1002 tmp = bitmap[i] & mask[i];
1003 res[i] = tmp;
1004 }
1005 return len;
1006 }
1007
1008 static void encode_nfs4_seqid(struct xdr_stream *xdr,
1009 const struct nfs_seqid *seqid)
1010 {
1011 if (seqid != NULL)
1012 encode_uint32(xdr, seqid->sequence->counter);
1013 else
1014 encode_uint32(xdr, 0);
1015 }
1016
1017 static void encode_compound_hdr(struct xdr_stream *xdr,
1018 struct rpc_rqst *req,
1019 struct compound_hdr *hdr)
1020 {
1021 __be32 *p;
1022
1023 /* initialize running count of expected bytes in reply.
1024 * NOTE: the replied tag SHOULD be the same is the one sent,
1025 * but this is not required as a MUST for the server to do so. */
1026 hdr->replen = 3 + hdr->taglen;
1027
1028 WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
1029 encode_string(xdr, hdr->taglen, hdr->tag);
1030 p = reserve_space(xdr, 8);
1031 *p++ = cpu_to_be32(hdr->minorversion);
1032 hdr->nops_p = p;
1033 *p = cpu_to_be32(hdr->nops);
1034 }
1035
1036 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
1037 uint32_t replen,
1038 struct compound_hdr *hdr)
1039 {
1040 encode_uint32(xdr, op);
1041 hdr->nops++;
1042 hdr->replen += replen;
1043 }
1044
1045 static void encode_nops(struct compound_hdr *hdr)
1046 {
1047 WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
1048 *hdr->nops_p = htonl(hdr->nops);
1049 }
1050
1051 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1052 {
1053 encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1054 }
1055
1056 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1057 {
1058 encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1059 }
1060
1061 static __be32 *
1062 xdr_encode_nfstime4(__be32 *p, const struct timespec64 *t)
1063 {
1064 p = xdr_encode_hyper(p, t->tv_sec);
1065 *p++ = cpu_to_be32(t->tv_nsec);
1066 return p;
1067 }
1068
1069 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1070 const struct nfs4_label *label,
1071 const umode_t *umask,
1072 const struct nfs_server *server,
1073 const uint32_t attrmask[])
1074 {
1075 char owner_name[IDMAP_NAMESZ];
1076 char owner_group[IDMAP_NAMESZ];
1077 int owner_namelen = 0;
1078 int owner_grouplen = 0;
1079 __be32 *p;
1080 uint32_t len = 0;
1081 uint32_t bmval[3] = { 0 };
1082
1083 /*
1084 * We reserve enough space to write the entire attribute buffer at once.
1085 */
1086 if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1087 bmval[0] |= FATTR4_WORD0_SIZE;
1088 len += 8;
1089 }
1090 if (iap->ia_valid & ATTR_MODE) {
1091 if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1092 bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1093 len += 8;
1094 } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1095 bmval[1] |= FATTR4_WORD1_MODE;
1096 len += 4;
1097 }
1098 }
1099 if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1100 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1101 if (owner_namelen < 0) {
1102 dprintk("nfs: couldn't resolve uid %d to string\n",
1103 from_kuid(&init_user_ns, iap->ia_uid));
1104 /* XXX */
1105 strcpy(owner_name, "nobody");
1106 owner_namelen = sizeof("nobody") - 1;
1107 /* goto out; */
1108 }
1109 bmval[1] |= FATTR4_WORD1_OWNER;
1110 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1111 }
1112 if ((iap->ia_valid & ATTR_GID) &&
1113 (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1114 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1115 if (owner_grouplen < 0) {
1116 dprintk("nfs: couldn't resolve gid %d to string\n",
1117 from_kgid(&init_user_ns, iap->ia_gid));
1118 strcpy(owner_group, "nobody");
1119 owner_grouplen = sizeof("nobody") - 1;
1120 /* goto out; */
1121 }
1122 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1123 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1124 }
1125 if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1126 if (iap->ia_valid & ATTR_ATIME_SET) {
1127 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1128 len += 4 + (nfstime4_maxsz << 2);
1129 } else if (iap->ia_valid & ATTR_ATIME) {
1130 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1131 len += 4;
1132 }
1133 }
1134 if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1135 if (iap->ia_valid & ATTR_MTIME_SET) {
1136 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1137 len += 4 + (nfstime4_maxsz << 2);
1138 } else if (iap->ia_valid & ATTR_MTIME) {
1139 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1140 len += 4;
1141 }
1142 }
1143
1144 if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1145 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1146 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1147 }
1148
1149 xdr_encode_bitmap4(xdr, bmval, ARRAY_SIZE(bmval));
1150 xdr_stream_encode_opaque_inline(xdr, (void **)&p, len);
1151
1152 if (bmval[0] & FATTR4_WORD0_SIZE)
1153 p = xdr_encode_hyper(p, iap->ia_size);
1154 if (bmval[1] & FATTR4_WORD1_MODE)
1155 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1156 if (bmval[1] & FATTR4_WORD1_OWNER)
1157 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1158 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1159 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1160 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1161 if (iap->ia_valid & ATTR_ATIME_SET) {
1162 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1163 p = xdr_encode_nfstime4(p, &iap->ia_atime);
1164 } else
1165 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1166 }
1167 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1168 if (iap->ia_valid & ATTR_MTIME_SET) {
1169 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1170 p = xdr_encode_nfstime4(p, &iap->ia_mtime);
1171 } else
1172 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1173 }
1174 if (label && (bmval[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1175 *p++ = cpu_to_be32(label->lfs);
1176 *p++ = cpu_to_be32(label->pi);
1177 *p++ = cpu_to_be32(label->len);
1178 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1179 }
1180 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1181 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1182 *p++ = cpu_to_be32(*umask);
1183 }
1184
1185 /* out: */
1186 }
1187
1188 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1189 {
1190 encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1191 encode_uint32(xdr, access);
1192 }
1193
1194 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1195 {
1196 encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1197 encode_nfs4_seqid(xdr, arg->seqid);
1198 encode_nfs4_stateid(xdr, &arg->stateid);
1199 }
1200
1201 static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1202 {
1203 __be32 *p;
1204
1205 encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1206 p = reserve_space(xdr, 12);
1207 p = xdr_encode_hyper(p, args->offset);
1208 *p = cpu_to_be32(args->count);
1209 }
1210
1211 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1212 {
1213 __be32 *p;
1214
1215 encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1216 encode_uint32(xdr, create->ftype);
1217
1218 switch (create->ftype) {
1219 case NF4LNK:
1220 p = reserve_space(xdr, 4);
1221 *p = cpu_to_be32(create->u.symlink.len);
1222 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1223 create->u.symlink.len);
1224 xdr->buf->flags |= XDRBUF_WRITE;
1225 break;
1226
1227 case NF4BLK: case NF4CHR:
1228 p = reserve_space(xdr, 8);
1229 *p++ = cpu_to_be32(create->u.device.specdata1);
1230 *p = cpu_to_be32(create->u.device.specdata2);
1231 break;
1232
1233 default:
1234 break;
1235 }
1236
1237 encode_string(xdr, create->name->len, create->name->name);
1238 encode_attrs(xdr, create->attrs, create->label, &create->umask,
1239 create->server, create->server->attr_bitmask);
1240 }
1241
1242 static void encode_getattr(struct xdr_stream *xdr,
1243 const __u32 *bitmap, const __u32 *mask, size_t len,
1244 struct compound_hdr *hdr)
1245 {
1246 __u32 masked_bitmap[nfs4_fattr_bitmap_maxsz];
1247
1248 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1249 if (mask) {
1250 if (WARN_ON_ONCE(len > ARRAY_SIZE(masked_bitmap)))
1251 len = ARRAY_SIZE(masked_bitmap);
1252 len = mask_bitmap4(bitmap, mask, masked_bitmap, len);
1253 bitmap = masked_bitmap;
1254 }
1255 xdr_encode_bitmap4(xdr, bitmap, len);
1256 }
1257
1258 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1259 {
1260 encode_getattr(xdr, nfs4_fattr_bitmap, bitmask,
1261 ARRAY_SIZE(nfs4_fattr_bitmap), hdr);
1262 }
1263
1264 static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1265 const u32 *open_bitmap,
1266 struct compound_hdr *hdr)
1267 {
1268 encode_getattr(xdr, open_bitmap, bitmask, 3, hdr);
1269 }
1270
1271 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1272 {
1273 encode_getattr(xdr, nfs4_fsinfo_bitmap, bitmask,
1274 ARRAY_SIZE(nfs4_fsinfo_bitmap), hdr);
1275 }
1276
1277 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1278 {
1279 encode_getattr(xdr, nfs4_fs_locations_bitmap, bitmask,
1280 ARRAY_SIZE(nfs4_fs_locations_bitmap), hdr);
1281 }
1282
1283 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1284 {
1285 encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1286 }
1287
1288 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1289 {
1290 encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1291 encode_string(xdr, name->len, name->name);
1292 }
1293
1294 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1295 {
1296 if (fl->fl_type == F_RDLCK)
1297 return block ? NFS4_READW_LT : NFS4_READ_LT;
1298 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1299 }
1300
1301 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1302 {
1303 if (fl->fl_end == OFFSET_MAX)
1304 return ~(uint64_t)0;
1305 return fl->fl_end - fl->fl_start + 1;
1306 }
1307
1308 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1309 {
1310 __be32 *p;
1311
1312 p = reserve_space(xdr, 32);
1313 p = xdr_encode_hyper(p, lowner->clientid);
1314 *p++ = cpu_to_be32(20);
1315 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1316 *p++ = cpu_to_be32(lowner->s_dev);
1317 xdr_encode_hyper(p, lowner->id);
1318 }
1319
1320 /*
1321 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1322 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1323 */
1324 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1325 {
1326 __be32 *p;
1327
1328 encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1329 p = reserve_space(xdr, 28);
1330 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1331 *p++ = cpu_to_be32(args->reclaim);
1332 p = xdr_encode_hyper(p, args->fl->fl_start);
1333 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1334 *p = cpu_to_be32(args->new_lock_owner);
1335 if (args->new_lock_owner){
1336 encode_nfs4_seqid(xdr, args->open_seqid);
1337 encode_nfs4_stateid(xdr, &args->open_stateid);
1338 encode_nfs4_seqid(xdr, args->lock_seqid);
1339 encode_lockowner(xdr, &args->lock_owner);
1340 }
1341 else {
1342 encode_nfs4_stateid(xdr, &args->lock_stateid);
1343 encode_nfs4_seqid(xdr, args->lock_seqid);
1344 }
1345 }
1346
1347 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1348 {
1349 __be32 *p;
1350
1351 encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1352 p = reserve_space(xdr, 20);
1353 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1354 p = xdr_encode_hyper(p, args->fl->fl_start);
1355 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1356 encode_lockowner(xdr, &args->lock_owner);
1357 }
1358
1359 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1360 {
1361 __be32 *p;
1362
1363 encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1364 encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1365 encode_nfs4_seqid(xdr, args->seqid);
1366 encode_nfs4_stateid(xdr, &args->stateid);
1367 p = reserve_space(xdr, 16);
1368 p = xdr_encode_hyper(p, args->fl->fl_start);
1369 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1370 }
1371
1372 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1373 {
1374 encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1375 encode_lockowner(xdr, lowner);
1376 }
1377
1378 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1379 {
1380 encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1381 encode_string(xdr, name->len, name->name);
1382 }
1383
1384 static void encode_lookupp(struct xdr_stream *xdr, struct compound_hdr *hdr)
1385 {
1386 encode_op_hdr(xdr, OP_LOOKUPP, decode_lookupp_maxsz, hdr);
1387 }
1388
1389 static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1390 {
1391 __be32 *p;
1392
1393 p = reserve_space(xdr, 8);
1394 *p++ = cpu_to_be32(share_access);
1395 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1396 }
1397
1398 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1399 {
1400 __be32 *p;
1401 /*
1402 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1403 * owner 4 = 32
1404 */
1405 encode_nfs4_seqid(xdr, arg->seqid);
1406 encode_share_access(xdr, arg->share_access);
1407 p = reserve_space(xdr, 36);
1408 p = xdr_encode_hyper(p, arg->clientid);
1409 *p++ = cpu_to_be32(24);
1410 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1411 *p++ = cpu_to_be32(arg->server->s_dev);
1412 *p++ = cpu_to_be32(arg->id.uniquifier);
1413 xdr_encode_hyper(p, arg->id.create_time);
1414 }
1415
1416 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1417 {
1418 __be32 *p;
1419
1420 p = reserve_space(xdr, 4);
1421 switch(arg->createmode) {
1422 case NFS4_CREATE_UNCHECKED:
1423 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1424 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1425 arg->server, arg->server->attr_bitmask);
1426 break;
1427 case NFS4_CREATE_GUARDED:
1428 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1429 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1430 arg->server, arg->server->attr_bitmask);
1431 break;
1432 case NFS4_CREATE_EXCLUSIVE:
1433 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1434 encode_nfs4_verifier(xdr, &arg->u.verifier);
1435 break;
1436 case NFS4_CREATE_EXCLUSIVE4_1:
1437 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1438 encode_nfs4_verifier(xdr, &arg->u.verifier);
1439 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1440 arg->server, arg->server->exclcreat_bitmask);
1441 }
1442 }
1443
1444 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1445 {
1446 __be32 *p;
1447
1448 p = reserve_space(xdr, 4);
1449 switch (arg->open_flags & O_CREAT) {
1450 case 0:
1451 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1452 break;
1453 default:
1454 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1455 encode_createmode(xdr, arg);
1456 }
1457 }
1458
1459 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1460 {
1461 __be32 *p;
1462
1463 p = reserve_space(xdr, 4);
1464 switch (delegation_type) {
1465 case 0:
1466 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1467 break;
1468 case FMODE_READ:
1469 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1470 break;
1471 case FMODE_WRITE|FMODE_READ:
1472 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1473 break;
1474 default:
1475 BUG();
1476 }
1477 }
1478
1479 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1480 {
1481 __be32 *p;
1482
1483 p = reserve_space(xdr, 4);
1484 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1485 encode_string(xdr, name->len, name->name);
1486 }
1487
1488 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1489 {
1490 __be32 *p;
1491
1492 p = reserve_space(xdr, 4);
1493 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1494 encode_delegation_type(xdr, type);
1495 }
1496
1497 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1498 {
1499 __be32 *p;
1500
1501 p = reserve_space(xdr, 4);
1502 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1503 encode_nfs4_stateid(xdr, stateid);
1504 encode_string(xdr, name->len, name->name);
1505 }
1506
1507 static inline void encode_claim_fh(struct xdr_stream *xdr)
1508 {
1509 __be32 *p;
1510
1511 p = reserve_space(xdr, 4);
1512 *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1513 }
1514
1515 static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1516 {
1517 __be32 *p;
1518
1519 p = reserve_space(xdr, 4);
1520 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1521 encode_nfs4_stateid(xdr, stateid);
1522 }
1523
1524 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1525 {
1526 encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1527 encode_openhdr(xdr, arg);
1528 encode_opentype(xdr, arg);
1529 switch (arg->claim) {
1530 case NFS4_OPEN_CLAIM_NULL:
1531 encode_claim_null(xdr, arg->name);
1532 break;
1533 case NFS4_OPEN_CLAIM_PREVIOUS:
1534 encode_claim_previous(xdr, arg->u.delegation_type);
1535 break;
1536 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1537 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1538 break;
1539 case NFS4_OPEN_CLAIM_FH:
1540 encode_claim_fh(xdr);
1541 break;
1542 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1543 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1544 break;
1545 default:
1546 BUG();
1547 }
1548 }
1549
1550 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1551 {
1552 encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1553 encode_nfs4_stateid(xdr, arg->stateid);
1554 encode_nfs4_seqid(xdr, arg->seqid);
1555 }
1556
1557 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1558 {
1559 encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1560 encode_nfs4_stateid(xdr, &arg->stateid);
1561 encode_nfs4_seqid(xdr, arg->seqid);
1562 encode_share_access(xdr, arg->share_access);
1563 }
1564
1565 static void
1566 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1567 {
1568 encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1569 encode_string(xdr, fh->size, fh->data);
1570 }
1571
1572 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1573 {
1574 encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1575 }
1576
1577 static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1578 struct compound_hdr *hdr)
1579 {
1580 __be32 *p;
1581
1582 encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1583 encode_nfs4_stateid(xdr, &args->stateid);
1584
1585 p = reserve_space(xdr, 12);
1586 p = xdr_encode_hyper(p, args->offset);
1587 *p = cpu_to_be32(args->count);
1588 }
1589
1590 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1591 {
1592 uint32_t attrs[3] = {
1593 FATTR4_WORD0_RDATTR_ERROR,
1594 FATTR4_WORD1_MOUNTED_ON_FILEID,
1595 };
1596 uint32_t dircount = readdir->count >> 1;
1597 __be32 *p, verf[2];
1598 uint32_t attrlen = 0;
1599 unsigned int i;
1600
1601 if (readdir->plus) {
1602 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1603 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1604 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1605 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1606 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1607 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1608 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1609 dircount >>= 1;
1610 }
1611 /* Use mounted_on_fileid only if the server supports it */
1612 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1613 attrs[0] |= FATTR4_WORD0_FILEID;
1614 for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1615 attrs[i] &= readdir->bitmask[i];
1616 if (attrs[i] != 0)
1617 attrlen = i+1;
1618 }
1619
1620 encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1621 encode_uint64(xdr, readdir->cookie);
1622 encode_nfs4_verifier(xdr, &readdir->verifier);
1623 p = reserve_space(xdr, 12 + (attrlen << 2));
1624 *p++ = cpu_to_be32(dircount);
1625 *p++ = cpu_to_be32(readdir->count);
1626 *p++ = cpu_to_be32(attrlen);
1627 for (i = 0; i < attrlen; i++)
1628 *p++ = cpu_to_be32(attrs[i]);
1629 memcpy(verf, readdir->verifier.data, sizeof(verf));
1630
1631 dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1632 __func__,
1633 (unsigned long long)readdir->cookie,
1634 verf[0], verf[1],
1635 attrs[0] & readdir->bitmask[0],
1636 attrs[1] & readdir->bitmask[1],
1637 attrs[2] & readdir->bitmask[2]);
1638 }
1639
1640 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1641 {
1642 encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1643 }
1644
1645 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1646 {
1647 encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1648 encode_string(xdr, name->len, name->name);
1649 }
1650
1651 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1652 {
1653 encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1654 encode_string(xdr, oldname->len, oldname->name);
1655 encode_string(xdr, newname->len, newname->name);
1656 }
1657
1658 static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1659 struct compound_hdr *hdr)
1660 {
1661 encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1662 encode_uint64(xdr, clid);
1663 }
1664
1665 static void
1666 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1667 {
1668 encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1669 }
1670
1671 static void
1672 encode_setacl(struct xdr_stream *xdr, const struct nfs_setaclargs *arg,
1673 struct compound_hdr *hdr)
1674 {
1675 __be32 *p;
1676
1677 encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1678 encode_nfs4_stateid(xdr, &zero_stateid);
1679 p = reserve_space(xdr, 2*4);
1680 *p++ = cpu_to_be32(1);
1681 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1682 p = reserve_space(xdr, 4);
1683 *p = cpu_to_be32(arg->acl_len);
1684 xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1685 }
1686
1687 static void
1688 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1689 {
1690 encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1691 }
1692
1693 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1694 {
1695 encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1696 encode_nfs4_stateid(xdr, &arg->stateid);
1697 encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1698 server->attr_bitmask);
1699 }
1700
1701 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1702 {
1703 __be32 *p;
1704
1705 encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1706 encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1707
1708 encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1709 setclientid->sc_clnt->cl_owner_id);
1710 p = reserve_space(xdr, 4);
1711 *p = cpu_to_be32(setclientid->sc_prog);
1712 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1713 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1714 p = reserve_space(xdr, 4);
1715 *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1716 }
1717
1718 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1719 {
1720 encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1721 decode_setclientid_confirm_maxsz, hdr);
1722 encode_uint64(xdr, arg->clientid);
1723 encode_nfs4_verifier(xdr, &arg->confirm);
1724 }
1725
1726 static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1727 struct compound_hdr *hdr)
1728 {
1729 __be32 *p;
1730
1731 encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1732 encode_nfs4_stateid(xdr, &args->stateid);
1733
1734 p = reserve_space(xdr, 16);
1735 p = xdr_encode_hyper(p, args->offset);
1736 *p++ = cpu_to_be32(args->stable);
1737 *p = cpu_to_be32(args->count);
1738
1739 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1740 }
1741
1742 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1743 {
1744 encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1745 encode_nfs4_stateid(xdr, stateid);
1746 }
1747
1748 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1749 {
1750 encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1751 encode_string(xdr, name->len, name->name);
1752 }
1753
1754 #if defined(CONFIG_NFS_V4_1)
1755 /* NFSv4.1 operations */
1756 static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1757 const struct nfs41_bind_conn_to_session_args *args,
1758 struct compound_hdr *hdr)
1759 {
1760 __be32 *p;
1761
1762 encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1763 decode_bind_conn_to_session_maxsz, hdr);
1764 encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1765 p = xdr_reserve_space(xdr, 8);
1766 *p++ = cpu_to_be32(args->dir);
1767 *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1768 }
1769
1770 static void encode_op_map(struct xdr_stream *xdr, const struct nfs4_op_map *op_map)
1771 {
1772 unsigned int i;
1773 encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1774 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1775 encode_uint32(xdr, op_map->u.words[i]);
1776 }
1777
1778 static void encode_exchange_id(struct xdr_stream *xdr,
1779 const struct nfs41_exchange_id_args *args,
1780 struct compound_hdr *hdr)
1781 {
1782 __be32 *p;
1783 char impl_name[IMPL_NAME_LIMIT];
1784 int len = 0;
1785
1786 encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1787 encode_nfs4_verifier(xdr, &args->verifier);
1788
1789 encode_string(xdr, strlen(args->client->cl_owner_id),
1790 args->client->cl_owner_id);
1791
1792 encode_uint32(xdr, args->flags);
1793 encode_uint32(xdr, args->state_protect.how);
1794
1795 switch (args->state_protect.how) {
1796 case SP4_NONE:
1797 break;
1798 case SP4_MACH_CRED:
1799 encode_op_map(xdr, &args->state_protect.enforce);
1800 encode_op_map(xdr, &args->state_protect.allow);
1801 break;
1802 default:
1803 WARN_ON_ONCE(1);
1804 break;
1805 }
1806
1807 if (send_implementation_id &&
1808 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1809 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1810 <= sizeof(impl_name) + 1)
1811 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1812 utsname()->sysname, utsname()->release,
1813 utsname()->version, utsname()->machine);
1814
1815 if (len > 0) {
1816 encode_uint32(xdr, 1); /* implementation id array length=1 */
1817
1818 encode_string(xdr,
1819 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1820 CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1821 encode_string(xdr, len, impl_name);
1822 /* just send zeros for nii_date - the date is in nii_name */
1823 p = reserve_space(xdr, 12);
1824 p = xdr_encode_hyper(p, 0);
1825 *p = cpu_to_be32(0);
1826 } else
1827 encode_uint32(xdr, 0); /* implementation id array length=0 */
1828 }
1829
1830 static void encode_create_session(struct xdr_stream *xdr,
1831 const struct nfs41_create_session_args *args,
1832 struct compound_hdr *hdr)
1833 {
1834 __be32 *p;
1835 struct nfs_client *clp = args->client;
1836 struct rpc_clnt *clnt = clp->cl_rpcclient;
1837 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1838 u32 max_resp_sz_cached;
1839
1840 /*
1841 * Assumes OPEN is the biggest non-idempotent compound.
1842 * 2 is the verifier.
1843 */
1844 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE + 2)
1845 * XDR_UNIT + RPC_MAX_AUTH_SIZE;
1846
1847 encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1848 p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1849 p = xdr_encode_hyper(p, args->clientid);
1850 *p++ = cpu_to_be32(args->seqid); /*Sequence id */
1851 *p++ = cpu_to_be32(args->flags); /*flags */
1852
1853 /* Fore Channel */
1854 *p++ = cpu_to_be32(0); /* header padding size */
1855 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1856 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1857 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1858 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1859 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1860 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1861
1862 /* Back Channel */
1863 *p++ = cpu_to_be32(0); /* header padding size */
1864 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1865 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1866 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1867 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1868 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1869 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1870
1871 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1872 *p++ = cpu_to_be32(1);
1873 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1874
1875 /* authsys_parms rfc1831 */
1876 *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1877 p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1878 *p++ = cpu_to_be32(0); /* UID */
1879 *p++ = cpu_to_be32(0); /* GID */
1880 *p = cpu_to_be32(0); /* No more gids */
1881 }
1882
1883 static void encode_destroy_session(struct xdr_stream *xdr,
1884 const struct nfs4_session *session,
1885 struct compound_hdr *hdr)
1886 {
1887 encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1888 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1889 }
1890
1891 static void encode_destroy_clientid(struct xdr_stream *xdr,
1892 uint64_t clientid,
1893 struct compound_hdr *hdr)
1894 {
1895 encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1896 encode_uint64(xdr, clientid);
1897 }
1898
1899 static void encode_reclaim_complete(struct xdr_stream *xdr,
1900 const struct nfs41_reclaim_complete_args *args,
1901 struct compound_hdr *hdr)
1902 {
1903 encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1904 encode_uint32(xdr, args->one_fs);
1905 }
1906 #endif /* CONFIG_NFS_V4_1 */
1907
1908 static void encode_sequence(struct xdr_stream *xdr,
1909 const struct nfs4_sequence_args *args,
1910 struct compound_hdr *hdr)
1911 {
1912 #if defined(CONFIG_NFS_V4_1)
1913 struct nfs4_session *session;
1914 struct nfs4_slot_table *tp;
1915 struct nfs4_slot *slot = args->sa_slot;
1916 __be32 *p;
1917
1918 tp = slot->table;
1919 session = tp->session;
1920 if (!session)
1921 return;
1922
1923 encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1924
1925 /*
1926 * Sessionid + seqid + slotid + max slotid + cache_this
1927 */
1928 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1929 "max_slotid=%d cache_this=%d\n",
1930 __func__,
1931 ((u32 *)session->sess_id.data)[0],
1932 ((u32 *)session->sess_id.data)[1],
1933 ((u32 *)session->sess_id.data)[2],
1934 ((u32 *)session->sess_id.data)[3],
1935 slot->seq_nr, slot->slot_nr,
1936 tp->highest_used_slotid, args->sa_cache_this);
1937 p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1938 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1939 *p++ = cpu_to_be32(slot->seq_nr);
1940 *p++ = cpu_to_be32(slot->slot_nr);
1941 *p++ = cpu_to_be32(tp->highest_used_slotid);
1942 *p = cpu_to_be32(args->sa_cache_this);
1943 #endif /* CONFIG_NFS_V4_1 */
1944 }
1945
1946 #ifdef CONFIG_NFS_V4_1
1947 static void
1948 encode_getdeviceinfo(struct xdr_stream *xdr,
1949 const struct nfs4_getdeviceinfo_args *args,
1950 struct compound_hdr *hdr)
1951 {
1952 __be32 *p;
1953
1954 encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1955 p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1956 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1957 NFS4_DEVICEID4_SIZE);
1958 *p++ = cpu_to_be32(args->pdev->layout_type);
1959 *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */
1960
1961 p = reserve_space(xdr, 4 + 4);
1962 *p++ = cpu_to_be32(1); /* bitmap length */
1963 *p++ = cpu_to_be32(args->notify_types);
1964 }
1965
1966 static void
1967 encode_layoutget(struct xdr_stream *xdr,
1968 const struct nfs4_layoutget_args *args,
1969 struct compound_hdr *hdr)
1970 {
1971 __be32 *p;
1972
1973 encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1974 p = reserve_space(xdr, 36);
1975 *p++ = cpu_to_be32(0); /* Signal layout available */
1976 *p++ = cpu_to_be32(args->type);
1977 *p++ = cpu_to_be32(args->range.iomode);
1978 p = xdr_encode_hyper(p, args->range.offset);
1979 p = xdr_encode_hyper(p, args->range.length);
1980 p = xdr_encode_hyper(p, args->minlength);
1981 encode_nfs4_stateid(xdr, &args->stateid);
1982 encode_uint32(xdr, args->maxcount);
1983
1984 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1985 __func__,
1986 args->type,
1987 args->range.iomode,
1988 (unsigned long)args->range.offset,
1989 (unsigned long)args->range.length,
1990 args->maxcount);
1991 }
1992
1993 static int
1994 encode_layoutcommit(struct xdr_stream *xdr,
1995 struct inode *inode,
1996 const struct nfs4_layoutcommit_args *args,
1997 struct compound_hdr *hdr)
1998 {
1999 __be32 *p;
2000
2001 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
2002 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
2003
2004 encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2005 p = reserve_space(xdr, 20);
2006 /* Only whole file layouts */
2007 p = xdr_encode_hyper(p, 0); /* offset */
2008 p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
2009 *p = cpu_to_be32(0); /* reclaim */
2010 encode_nfs4_stateid(xdr, &args->stateid);
2011 if (args->lastbytewritten != U64_MAX) {
2012 p = reserve_space(xdr, 20);
2013 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2014 p = xdr_encode_hyper(p, args->lastbytewritten);
2015 } else {
2016 p = reserve_space(xdr, 12);
2017 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2018 }
2019 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2020 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2021
2022 encode_uint32(xdr, args->layoutupdate_len);
2023 if (args->layoutupdate_pages)
2024 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2025 args->layoutupdate_len);
2026
2027 return 0;
2028 }
2029
2030 static void
2031 encode_layoutreturn(struct xdr_stream *xdr,
2032 const struct nfs4_layoutreturn_args *args,
2033 struct compound_hdr *hdr)
2034 {
2035 __be32 *p;
2036
2037 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2038 p = reserve_space(xdr, 16);
2039 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
2040 *p++ = cpu_to_be32(args->layout_type);
2041 *p++ = cpu_to_be32(args->range.iomode);
2042 *p = cpu_to_be32(RETURN_FILE);
2043 p = reserve_space(xdr, 16);
2044 p = xdr_encode_hyper(p, args->range.offset);
2045 p = xdr_encode_hyper(p, args->range.length);
2046 spin_lock(&args->inode->i_lock);
2047 encode_nfs4_stateid(xdr, &args->stateid);
2048 spin_unlock(&args->inode->i_lock);
2049 if (args->ld_private->ops && args->ld_private->ops->encode)
2050 args->ld_private->ops->encode(xdr, args, args->ld_private);
2051 else
2052 encode_uint32(xdr, 0);
2053 }
2054
2055 static int
2056 encode_secinfo_no_name(struct xdr_stream *xdr,
2057 const struct nfs41_secinfo_no_name_args *args,
2058 struct compound_hdr *hdr)
2059 {
2060 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2061 encode_uint32(xdr, args->style);
2062 return 0;
2063 }
2064
2065 static void encode_test_stateid(struct xdr_stream *xdr,
2066 const struct nfs41_test_stateid_args *args,
2067 struct compound_hdr *hdr)
2068 {
2069 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2070 encode_uint32(xdr, 1);
2071 encode_nfs4_stateid(xdr, args->stateid);
2072 }
2073
2074 static void encode_free_stateid(struct xdr_stream *xdr,
2075 const struct nfs41_free_stateid_args *args,
2076 struct compound_hdr *hdr)
2077 {
2078 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2079 encode_nfs4_stateid(xdr, &args->stateid);
2080 }
2081 #else
2082 static inline void
2083 encode_layoutreturn(struct xdr_stream *xdr,
2084 const struct nfs4_layoutreturn_args *args,
2085 struct compound_hdr *hdr)
2086 {
2087 }
2088
2089 static void
2090 encode_layoutget(struct xdr_stream *xdr,
2091 const struct nfs4_layoutget_args *args,
2092 struct compound_hdr *hdr)
2093 {
2094 }
2095 #endif /* CONFIG_NFS_V4_1 */
2096
2097 /*
2098 * END OF "GENERIC" ENCODE ROUTINES.
2099 */
2100
2101 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2102 {
2103 #if defined(CONFIG_NFS_V4_1)
2104 struct nfs4_session *session = args->sa_slot->table->session;
2105 if (session)
2106 return session->clp->cl_mvops->minor_version;
2107 #endif /* CONFIG_NFS_V4_1 */
2108 return 0;
2109 }
2110
2111 /*
2112 * Encode an ACCESS request
2113 */
2114 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2115 const void *data)
2116 {
2117 const struct nfs4_accessargs *args = data;
2118 struct compound_hdr hdr = {
2119 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2120 };
2121
2122 encode_compound_hdr(xdr, req, &hdr);
2123 encode_sequence(xdr, &args->seq_args, &hdr);
2124 encode_putfh(xdr, args->fh, &hdr);
2125 encode_access(xdr, args->access, &hdr);
2126 if (args->bitmask)
2127 encode_getfattr(xdr, args->bitmask, &hdr);
2128 encode_nops(&hdr);
2129 }
2130
2131 /*
2132 * Encode LOOKUP request
2133 */
2134 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2135 const void *data)
2136 {
2137 const struct nfs4_lookup_arg *args = data;
2138 struct compound_hdr hdr = {
2139 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2140 };
2141
2142 encode_compound_hdr(xdr, req, &hdr);
2143 encode_sequence(xdr, &args->seq_args, &hdr);
2144 encode_putfh(xdr, args->dir_fh, &hdr);
2145 encode_lookup(xdr, args->name, &hdr);
2146 encode_getfh(xdr, &hdr);
2147 encode_getfattr(xdr, args->bitmask, &hdr);
2148 encode_nops(&hdr);
2149 }
2150
2151 /*
2152 * Encode LOOKUPP request
2153 */
2154 static void nfs4_xdr_enc_lookupp(struct rpc_rqst *req, struct xdr_stream *xdr,
2155 const void *data)
2156 {
2157 const struct nfs4_lookupp_arg *args = data;
2158 struct compound_hdr hdr = {
2159 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2160 };
2161
2162 encode_compound_hdr(xdr, req, &hdr);
2163 encode_sequence(xdr, &args->seq_args, &hdr);
2164 encode_putfh(xdr, args->fh, &hdr);
2165 encode_lookupp(xdr, &hdr);
2166 encode_getfh(xdr, &hdr);
2167 encode_getfattr(xdr, args->bitmask, &hdr);
2168 encode_nops(&hdr);
2169 }
2170
2171 /*
2172 * Encode LOOKUP_ROOT request
2173 */
2174 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2175 struct xdr_stream *xdr,
2176 const void *data)
2177 {
2178 const struct nfs4_lookup_root_arg *args = data;
2179 struct compound_hdr hdr = {
2180 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2181 };
2182
2183 encode_compound_hdr(xdr, req, &hdr);
2184 encode_sequence(xdr, &args->seq_args, &hdr);
2185 encode_putrootfh(xdr, &hdr);
2186 encode_getfh(xdr, &hdr);
2187 encode_getfattr(xdr, args->bitmask, &hdr);
2188 encode_nops(&hdr);
2189 }
2190
2191 /*
2192 * Encode REMOVE request
2193 */
2194 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2195 const void *data)
2196 {
2197 const struct nfs_removeargs *args = data;
2198 struct compound_hdr hdr = {
2199 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2200 };
2201
2202 encode_compound_hdr(xdr, req, &hdr);
2203 encode_sequence(xdr, &args->seq_args, &hdr);
2204 encode_putfh(xdr, args->fh, &hdr);
2205 encode_remove(xdr, &args->name, &hdr);
2206 encode_nops(&hdr);
2207 }
2208
2209 /*
2210 * Encode RENAME request
2211 */
2212 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2213 const void *data)
2214 {
2215 const struct nfs_renameargs *args = data;
2216 struct compound_hdr hdr = {
2217 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2218 };
2219
2220 encode_compound_hdr(xdr, req, &hdr);
2221 encode_sequence(xdr, &args->seq_args, &hdr);
2222 encode_putfh(xdr, args->old_dir, &hdr);
2223 encode_savefh(xdr, &hdr);
2224 encode_putfh(xdr, args->new_dir, &hdr);
2225 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2226 encode_nops(&hdr);
2227 }
2228
2229 /*
2230 * Encode LINK request
2231 */
2232 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2233 const void *data)
2234 {
2235 const struct nfs4_link_arg *args = data;
2236 struct compound_hdr hdr = {
2237 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2238 };
2239
2240 encode_compound_hdr(xdr, req, &hdr);
2241 encode_sequence(xdr, &args->seq_args, &hdr);
2242 encode_putfh(xdr, args->fh, &hdr);
2243 encode_savefh(xdr, &hdr);
2244 encode_putfh(xdr, args->dir_fh, &hdr);
2245 encode_link(xdr, args->name, &hdr);
2246 encode_restorefh(xdr, &hdr);
2247 encode_getfattr(xdr, args->bitmask, &hdr);
2248 encode_nops(&hdr);
2249 }
2250
2251 /*
2252 * Encode CREATE request
2253 */
2254 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2255 const void *data)
2256 {
2257 const struct nfs4_create_arg *args = data;
2258 struct compound_hdr hdr = {
2259 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2260 };
2261
2262 encode_compound_hdr(xdr, req, &hdr);
2263 encode_sequence(xdr, &args->seq_args, &hdr);
2264 encode_putfh(xdr, args->dir_fh, &hdr);
2265 encode_create(xdr, args, &hdr);
2266 encode_getfh(xdr, &hdr);
2267 encode_getfattr(xdr, args->bitmask, &hdr);
2268 encode_nops(&hdr);
2269 }
2270
2271 /*
2272 * Encode SYMLINK request
2273 */
2274 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2275 const void *data)
2276 {
2277 const struct nfs4_create_arg *args = data;
2278
2279 nfs4_xdr_enc_create(req, xdr, args);
2280 }
2281
2282 /*
2283 * Encode GETATTR request
2284 */
2285 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2286 const void *data)
2287 {
2288 const struct nfs4_getattr_arg *args = data;
2289 struct compound_hdr hdr = {
2290 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2291 };
2292
2293 encode_compound_hdr(xdr, req, &hdr);
2294 encode_sequence(xdr, &args->seq_args, &hdr);
2295 encode_putfh(xdr, args->fh, &hdr);
2296 encode_getfattr(xdr, args->bitmask, &hdr);
2297 encode_nops(&hdr);
2298 }
2299
2300 /*
2301 * Encode a CLOSE request
2302 */
2303 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2304 const void *data)
2305 {
2306 const struct nfs_closeargs *args = data;
2307 struct compound_hdr hdr = {
2308 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2309 };
2310
2311 encode_compound_hdr(xdr, req, &hdr);
2312 encode_sequence(xdr, &args->seq_args, &hdr);
2313 encode_putfh(xdr, args->fh, &hdr);
2314 if (args->lr_args)
2315 encode_layoutreturn(xdr, args->lr_args, &hdr);
2316 if (args->bitmask != NULL)
2317 encode_getfattr(xdr, args->bitmask, &hdr);
2318 encode_close(xdr, args, &hdr);
2319 encode_nops(&hdr);
2320 }
2321
2322 /*
2323 * Encode an OPEN request
2324 */
2325 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2326 const void *data)
2327 {
2328 const struct nfs_openargs *args = data;
2329 struct compound_hdr hdr = {
2330 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2331 };
2332
2333 encode_compound_hdr(xdr, req, &hdr);
2334 encode_sequence(xdr, &args->seq_args, &hdr);
2335 encode_putfh(xdr, args->fh, &hdr);
2336 encode_open(xdr, args, &hdr);
2337 encode_getfh(xdr, &hdr);
2338 if (args->access)
2339 encode_access(xdr, args->access, &hdr);
2340 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2341 if (args->lg_args) {
2342 encode_layoutget(xdr, args->lg_args, &hdr);
2343 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2344 args->lg_args->layout.pglen,
2345 hdr.replen);
2346 }
2347 encode_nops(&hdr);
2348 }
2349
2350 /*
2351 * Encode an OPEN_CONFIRM request
2352 */
2353 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2354 struct xdr_stream *xdr,
2355 const void *data)
2356 {
2357 const struct nfs_open_confirmargs *args = data;
2358 struct compound_hdr hdr = {
2359 .nops = 0,
2360 };
2361
2362 encode_compound_hdr(xdr, req, &hdr);
2363 encode_putfh(xdr, args->fh, &hdr);
2364 encode_open_confirm(xdr, args, &hdr);
2365 encode_nops(&hdr);
2366 }
2367
2368 /*
2369 * Encode an OPEN request with no attributes.
2370 */
2371 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2372 struct xdr_stream *xdr,
2373 const void *data)
2374 {
2375 const struct nfs_openargs *args = data;
2376 struct compound_hdr hdr = {
2377 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2378 };
2379
2380 encode_compound_hdr(xdr, req, &hdr);
2381 encode_sequence(xdr, &args->seq_args, &hdr);
2382 encode_putfh(xdr, args->fh, &hdr);
2383 encode_open(xdr, args, &hdr);
2384 if (args->access)
2385 encode_access(xdr, args->access, &hdr);
2386 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2387 if (args->lg_args) {
2388 encode_layoutget(xdr, args->lg_args, &hdr);
2389 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2390 args->lg_args->layout.pglen,
2391 hdr.replen);
2392 }
2393 encode_nops(&hdr);
2394 }
2395
2396 /*
2397 * Encode an OPEN_DOWNGRADE request
2398 */
2399 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2400 struct xdr_stream *xdr,
2401 const void *data)
2402 {
2403 const struct nfs_closeargs *args = data;
2404 struct compound_hdr hdr = {
2405 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2406 };
2407
2408 encode_compound_hdr(xdr, req, &hdr);
2409 encode_sequence(xdr, &args->seq_args, &hdr);
2410 encode_putfh(xdr, args->fh, &hdr);
2411 if (args->lr_args)
2412 encode_layoutreturn(xdr, args->lr_args, &hdr);
2413 encode_open_downgrade(xdr, args, &hdr);
2414 encode_nops(&hdr);
2415 }
2416
2417 /*
2418 * Encode a LOCK request
2419 */
2420 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2421 const void *data)
2422 {
2423 const struct nfs_lock_args *args = data;
2424 struct compound_hdr hdr = {
2425 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2426 };
2427
2428 encode_compound_hdr(xdr, req, &hdr);
2429 encode_sequence(xdr, &args->seq_args, &hdr);
2430 encode_putfh(xdr, args->fh, &hdr);
2431 encode_lock(xdr, args, &hdr);
2432 encode_nops(&hdr);
2433 }
2434
2435 /*
2436 * Encode a LOCKT request
2437 */
2438 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2439 const void *data)
2440 {
2441 const struct nfs_lockt_args *args = data;
2442 struct compound_hdr hdr = {
2443 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2444 };
2445
2446 encode_compound_hdr(xdr, req, &hdr);
2447 encode_sequence(xdr, &args->seq_args, &hdr);
2448 encode_putfh(xdr, args->fh, &hdr);
2449 encode_lockt(xdr, args, &hdr);
2450 encode_nops(&hdr);
2451 }
2452
2453 /*
2454 * Encode a LOCKU request
2455 */
2456 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2457 const void *data)
2458 {
2459 const struct nfs_locku_args *args = data;
2460 struct compound_hdr hdr = {
2461 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2462 };
2463
2464 encode_compound_hdr(xdr, req, &hdr);
2465 encode_sequence(xdr, &args->seq_args, &hdr);
2466 encode_putfh(xdr, args->fh, &hdr);
2467 encode_locku(xdr, args, &hdr);
2468 encode_nops(&hdr);
2469 }
2470
2471 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2472 struct xdr_stream *xdr,
2473 const void *data)
2474 {
2475 const struct nfs_release_lockowner_args *args = data;
2476 struct compound_hdr hdr = {
2477 .minorversion = 0,
2478 };
2479
2480 encode_compound_hdr(xdr, req, &hdr);
2481 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2482 encode_nops(&hdr);
2483 }
2484
2485 /*
2486 * Encode a READLINK request
2487 */
2488 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2489 const void *data)
2490 {
2491 const struct nfs4_readlink *args = data;
2492 struct compound_hdr hdr = {
2493 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2494 };
2495
2496 encode_compound_hdr(xdr, req, &hdr);
2497 encode_sequence(xdr, &args->seq_args, &hdr);
2498 encode_putfh(xdr, args->fh, &hdr);
2499 encode_readlink(xdr, args, req, &hdr);
2500
2501 rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2502 args->pglen, hdr.replen);
2503 encode_nops(&hdr);
2504 }
2505
2506 /*
2507 * Encode a READDIR request
2508 */
2509 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2510 const void *data)
2511 {
2512 const struct nfs4_readdir_arg *args = data;
2513 struct compound_hdr hdr = {
2514 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2515 };
2516
2517 encode_compound_hdr(xdr, req, &hdr);
2518 encode_sequence(xdr, &args->seq_args, &hdr);
2519 encode_putfh(xdr, args->fh, &hdr);
2520 encode_readdir(xdr, args, req, &hdr);
2521
2522 rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2523 args->count, hdr.replen);
2524 encode_nops(&hdr);
2525 }
2526
2527 /*
2528 * Encode a READ request
2529 */
2530 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2531 const void *data)
2532 {
2533 const struct nfs_pgio_args *args = data;
2534 struct compound_hdr hdr = {
2535 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2536 };
2537
2538 encode_compound_hdr(xdr, req, &hdr);
2539 encode_sequence(xdr, &args->seq_args, &hdr);
2540 encode_putfh(xdr, args->fh, &hdr);
2541 encode_read(xdr, args, &hdr);
2542
2543 rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2544 args->count, hdr.replen);
2545 req->rq_rcv_buf.flags |= XDRBUF_READ;
2546 encode_nops(&hdr);
2547 }
2548
2549 /*
2550 * Encode an SETATTR request
2551 */
2552 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2553 const void *data)
2554 {
2555 const struct nfs_setattrargs *args = data;
2556 struct compound_hdr hdr = {
2557 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2558 };
2559
2560 encode_compound_hdr(xdr, req, &hdr);
2561 encode_sequence(xdr, &args->seq_args, &hdr);
2562 encode_putfh(xdr, args->fh, &hdr);
2563 encode_setattr(xdr, args, args->server, &hdr);
2564 encode_getfattr(xdr, args->bitmask, &hdr);
2565 encode_nops(&hdr);
2566 }
2567
2568 /*
2569 * Encode a GETACL request
2570 */
2571 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2572 const void *data)
2573 {
2574 const struct nfs_getaclargs *args = data;
2575 struct compound_hdr hdr = {
2576 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2577 };
2578 const __u32 nfs4_acl_bitmap[1] = {
2579 [0] = FATTR4_WORD0_ACL,
2580 };
2581 uint32_t replen;
2582
2583 encode_compound_hdr(xdr, req, &hdr);
2584 encode_sequence(xdr, &args->seq_args, &hdr);
2585 encode_putfh(xdr, args->fh, &hdr);
2586 replen = hdr.replen + op_decode_hdr_maxsz;
2587 encode_getattr(xdr, nfs4_acl_bitmap, NULL,
2588 ARRAY_SIZE(nfs4_acl_bitmap), &hdr);
2589
2590 rpc_prepare_reply_pages(req, args->acl_pages, 0,
2591 args->acl_len, replen + 1);
2592 encode_nops(&hdr);
2593 }
2594
2595 /*
2596 * Encode a WRITE request
2597 */
2598 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2599 const void *data)
2600 {
2601 const struct nfs_pgio_args *args = data;
2602 struct compound_hdr hdr = {
2603 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2604 };
2605
2606 encode_compound_hdr(xdr, req, &hdr);
2607 encode_sequence(xdr, &args->seq_args, &hdr);
2608 encode_putfh(xdr, args->fh, &hdr);
2609 encode_write(xdr, args, &hdr);
2610 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2611 if (args->bitmask)
2612 encode_getfattr(xdr, args->bitmask, &hdr);
2613 encode_nops(&hdr);
2614 }
2615
2616 /*
2617 * a COMMIT request
2618 */
2619 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2620 const void *data)
2621 {
2622 const struct nfs_commitargs *args = data;
2623 struct compound_hdr hdr = {
2624 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2625 };
2626
2627 encode_compound_hdr(xdr, req, &hdr);
2628 encode_sequence(xdr, &args->seq_args, &hdr);
2629 encode_putfh(xdr, args->fh, &hdr);
2630 encode_commit(xdr, args, &hdr);
2631 encode_nops(&hdr);
2632 }
2633
2634 /*
2635 * FSINFO request
2636 */
2637 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2638 const void *data)
2639 {
2640 const struct nfs4_fsinfo_arg *args = data;
2641 struct compound_hdr hdr = {
2642 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2643 };
2644
2645 encode_compound_hdr(xdr, req, &hdr);
2646 encode_sequence(xdr, &args->seq_args, &hdr);
2647 encode_putfh(xdr, args->fh, &hdr);
2648 encode_fsinfo(xdr, args->bitmask, &hdr);
2649 encode_nops(&hdr);
2650 }
2651
2652 /*
2653 * a PATHCONF request
2654 */
2655 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2656 const void *data)
2657 {
2658 const struct nfs4_pathconf_arg *args = data;
2659 struct compound_hdr hdr = {
2660 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2661 };
2662
2663 encode_compound_hdr(xdr, req, &hdr);
2664 encode_sequence(xdr, &args->seq_args, &hdr);
2665 encode_putfh(xdr, args->fh, &hdr);
2666 encode_getattr(xdr, nfs4_pathconf_bitmap, args->bitmask,
2667 ARRAY_SIZE(nfs4_pathconf_bitmap), &hdr);
2668 encode_nops(&hdr);
2669 }
2670
2671 /*
2672 * a STATFS request
2673 */
2674 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2675 const void *data)
2676 {
2677 const struct nfs4_statfs_arg *args = data;
2678 struct compound_hdr hdr = {
2679 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2680 };
2681
2682 encode_compound_hdr(xdr, req, &hdr);
2683 encode_sequence(xdr, &args->seq_args, &hdr);
2684 encode_putfh(xdr, args->fh, &hdr);
2685 encode_getattr(xdr, nfs4_statfs_bitmap, args->bitmask,
2686 ARRAY_SIZE(nfs4_statfs_bitmap), &hdr);
2687 encode_nops(&hdr);
2688 }
2689
2690 /*
2691 * GETATTR_BITMAP request
2692 */
2693 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2694 struct xdr_stream *xdr,
2695 const void *data)
2696 {
2697 const struct nfs4_server_caps_arg *args = data;
2698 const u32 *bitmask = args->bitmask;
2699 struct compound_hdr hdr = {
2700 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2701 };
2702
2703 encode_compound_hdr(xdr, req, &hdr);
2704 encode_sequence(xdr, &args->seq_args, &hdr);
2705 encode_putfh(xdr, args->fhandle, &hdr);
2706 encode_getattr(xdr, bitmask, NULL, 3, &hdr);
2707 encode_nops(&hdr);
2708 }
2709
2710 /*
2711 * a RENEW request
2712 */
2713 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2714 const void *data)
2715
2716 {
2717 const struct nfs_client *clp = data;
2718 struct compound_hdr hdr = {
2719 .nops = 0,
2720 };
2721
2722 encode_compound_hdr(xdr, req, &hdr);
2723 encode_renew(xdr, clp->cl_clientid, &hdr);
2724 encode_nops(&hdr);
2725 }
2726
2727 /*
2728 * a SETCLIENTID request
2729 */
2730 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2731 struct xdr_stream *xdr,
2732 const void *data)
2733 {
2734 const struct nfs4_setclientid *sc = data;
2735 struct compound_hdr hdr = {
2736 .nops = 0,
2737 };
2738
2739 encode_compound_hdr(xdr, req, &hdr);
2740 encode_setclientid(xdr, sc, &hdr);
2741 encode_nops(&hdr);
2742 }
2743
2744 /*
2745 * a SETCLIENTID_CONFIRM request
2746 */
2747 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2748 struct xdr_stream *xdr,
2749 const void *data)
2750 {
2751 const struct nfs4_setclientid_res *arg = data;
2752 struct compound_hdr hdr = {
2753 .nops = 0,
2754 };
2755
2756 encode_compound_hdr(xdr, req, &hdr);
2757 encode_setclientid_confirm(xdr, arg, &hdr);
2758 encode_nops(&hdr);
2759 }
2760
2761 /*
2762 * DELEGRETURN request
2763 */
2764 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2765 struct xdr_stream *xdr,
2766 const void *data)
2767 {
2768 const struct nfs4_delegreturnargs *args = data;
2769 struct compound_hdr hdr = {
2770 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2771 };
2772
2773 encode_compound_hdr(xdr, req, &hdr);
2774 encode_sequence(xdr, &args->seq_args, &hdr);
2775 encode_putfh(xdr, args->fhandle, &hdr);
2776 if (args->lr_args)
2777 encode_layoutreturn(xdr, args->lr_args, &hdr);
2778 if (args->bitmask)
2779 encode_getfattr(xdr, args->bitmask, &hdr);
2780 encode_delegreturn(xdr, args->stateid, &hdr);
2781 encode_nops(&hdr);
2782 }
2783
2784 /*
2785 * Encode FS_LOCATIONS request
2786 */
2787 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2788 struct xdr_stream *xdr,
2789 const void *data)
2790 {
2791 const struct nfs4_fs_locations_arg *args = data;
2792 struct compound_hdr hdr = {
2793 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2794 };
2795 uint32_t replen;
2796
2797 encode_compound_hdr(xdr, req, &hdr);
2798 encode_sequence(xdr, &args->seq_args, &hdr);
2799 if (args->migration) {
2800 encode_putfh(xdr, args->fh, &hdr);
2801 replen = hdr.replen;
2802 encode_fs_locations(xdr, args->bitmask, &hdr);
2803 if (args->renew)
2804 encode_renew(xdr, args->clientid, &hdr);
2805 } else {
2806 encode_putfh(xdr, args->dir_fh, &hdr);
2807 encode_lookup(xdr, args->name, &hdr);
2808 replen = hdr.replen;
2809 encode_fs_locations(xdr, args->bitmask, &hdr);
2810 }
2811
2812 rpc_prepare_reply_pages(req, (struct page **)&args->page, 0,
2813 PAGE_SIZE, replen + 1);
2814 encode_nops(&hdr);
2815 }
2816
2817 /*
2818 * Encode SECINFO request
2819 */
2820 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2821 struct xdr_stream *xdr,
2822 const void *data)
2823 {
2824 const struct nfs4_secinfo_arg *args = data;
2825 struct compound_hdr hdr = {
2826 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2827 };
2828
2829 encode_compound_hdr(xdr, req, &hdr);
2830 encode_sequence(xdr, &args->seq_args, &hdr);
2831 encode_putfh(xdr, args->dir_fh, &hdr);
2832 encode_secinfo(xdr, args->name, &hdr);
2833 encode_nops(&hdr);
2834 }
2835
2836 /*
2837 * Encode FSID_PRESENT request
2838 */
2839 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2840 struct xdr_stream *xdr,
2841 const void *data)
2842 {
2843 const struct nfs4_fsid_present_arg *args = data;
2844 struct compound_hdr hdr = {
2845 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2846 };
2847
2848 encode_compound_hdr(xdr, req, &hdr);
2849 encode_sequence(xdr, &args->seq_args, &hdr);
2850 encode_putfh(xdr, args->fh, &hdr);
2851 encode_getfh(xdr, &hdr);
2852 if (args->renew)
2853 encode_renew(xdr, args->clientid, &hdr);
2854 encode_nops(&hdr);
2855 }
2856
2857 #if defined(CONFIG_NFS_V4_1)
2858 /*
2859 * BIND_CONN_TO_SESSION request
2860 */
2861 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2862 struct xdr_stream *xdr,
2863 const void *data)
2864 {
2865 const struct nfs41_bind_conn_to_session_args *args = data;
2866 struct compound_hdr hdr = {
2867 .minorversion = args->client->cl_mvops->minor_version,
2868 };
2869
2870 encode_compound_hdr(xdr, req, &hdr);
2871 encode_bind_conn_to_session(xdr, args, &hdr);
2872 encode_nops(&hdr);
2873 }
2874
2875 /*
2876 * EXCHANGE_ID request
2877 */
2878 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2879 struct xdr_stream *xdr,
2880 const void *data)
2881 {
2882 const struct nfs41_exchange_id_args *args = data;
2883 struct compound_hdr hdr = {
2884 .minorversion = args->client->cl_mvops->minor_version,
2885 };
2886
2887 encode_compound_hdr(xdr, req, &hdr);
2888 encode_exchange_id(xdr, args, &hdr);
2889 encode_nops(&hdr);
2890 }
2891
2892 /*
2893 * a CREATE_SESSION request
2894 */
2895 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2896 struct xdr_stream *xdr,
2897 const void *data)
2898 {
2899 const struct nfs41_create_session_args *args = data;
2900 struct compound_hdr hdr = {
2901 .minorversion = args->client->cl_mvops->minor_version,
2902 };
2903
2904 encode_compound_hdr(xdr, req, &hdr);
2905 encode_create_session(xdr, args, &hdr);
2906 encode_nops(&hdr);
2907 }
2908
2909 /*
2910 * a DESTROY_SESSION request
2911 */
2912 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2913 struct xdr_stream *xdr,
2914 const void *data)
2915 {
2916 const struct nfs4_session *session = data;
2917 struct compound_hdr hdr = {
2918 .minorversion = session->clp->cl_mvops->minor_version,
2919 };
2920
2921 encode_compound_hdr(xdr, req, &hdr);
2922 encode_destroy_session(xdr, session, &hdr);
2923 encode_nops(&hdr);
2924 }
2925
2926 /*
2927 * a DESTROY_CLIENTID request
2928 */
2929 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2930 struct xdr_stream *xdr,
2931 const void *data)
2932 {
2933 const struct nfs_client *clp = data;
2934 struct compound_hdr hdr = {
2935 .minorversion = clp->cl_mvops->minor_version,
2936 };
2937
2938 encode_compound_hdr(xdr, req, &hdr);
2939 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2940 encode_nops(&hdr);
2941 }
2942
2943 /*
2944 * a SEQUENCE request
2945 */
2946 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2947 const void *data)
2948 {
2949 const struct nfs4_sequence_args *args = data;
2950 struct compound_hdr hdr = {
2951 .minorversion = nfs4_xdr_minorversion(args),
2952 };
2953
2954 encode_compound_hdr(xdr, req, &hdr);
2955 encode_sequence(xdr, args, &hdr);
2956 encode_nops(&hdr);
2957 }
2958
2959 #endif
2960
2961 /*
2962 * a GET_LEASE_TIME request
2963 */
2964 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2965 struct xdr_stream *xdr,
2966 const void *data)
2967 {
2968 const struct nfs4_get_lease_time_args *args = data;
2969 struct compound_hdr hdr = {
2970 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2971 };
2972 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2973
2974 encode_compound_hdr(xdr, req, &hdr);
2975 encode_sequence(xdr, &args->la_seq_args, &hdr);
2976 encode_putrootfh(xdr, &hdr);
2977 encode_fsinfo(xdr, lease_bitmap, &hdr);
2978 encode_nops(&hdr);
2979 }
2980
2981 #ifdef CONFIG_NFS_V4_1
2982
2983 /*
2984 * a RECLAIM_COMPLETE request
2985 */
2986 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2987 struct xdr_stream *xdr,
2988 const void *data)
2989 {
2990 const struct nfs41_reclaim_complete_args *args = data;
2991 struct compound_hdr hdr = {
2992 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2993 };
2994
2995 encode_compound_hdr(xdr, req, &hdr);
2996 encode_sequence(xdr, &args->seq_args, &hdr);
2997 encode_reclaim_complete(xdr, args, &hdr);
2998 encode_nops(&hdr);
2999 }
3000
3001 /*
3002 * Encode GETDEVICEINFO request
3003 */
3004 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
3005 struct xdr_stream *xdr,
3006 const void *data)
3007 {
3008 const struct nfs4_getdeviceinfo_args *args = data;
3009 struct compound_hdr hdr = {
3010 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3011 };
3012
3013 encode_compound_hdr(xdr, req, &hdr);
3014 encode_sequence(xdr, &args->seq_args, &hdr);
3015 encode_getdeviceinfo(xdr, args, &hdr);
3016
3017 /* set up reply kvec. Subtract notification bitmap max size (2)
3018 * so that notification bitmap is put in xdr_buf tail */
3019 rpc_prepare_reply_pages(req, args->pdev->pages, args->pdev->pgbase,
3020 args->pdev->pglen, hdr.replen - 2);
3021 encode_nops(&hdr);
3022 }
3023
3024 /*
3025 * Encode LAYOUTGET request
3026 */
3027 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
3028 struct xdr_stream *xdr,
3029 const void *data)
3030 {
3031 const struct nfs4_layoutget_args *args = data;
3032 struct compound_hdr hdr = {
3033 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3034 };
3035
3036 encode_compound_hdr(xdr, req, &hdr);
3037 encode_sequence(xdr, &args->seq_args, &hdr);
3038 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3039 encode_layoutget(xdr, args, &hdr);
3040
3041 rpc_prepare_reply_pages(req, args->layout.pages, 0,
3042 args->layout.pglen, hdr.replen);
3043 encode_nops(&hdr);
3044 }
3045
3046 /*
3047 * Encode LAYOUTCOMMIT request
3048 */
3049 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3050 struct xdr_stream *xdr,
3051 const void *priv)
3052 {
3053 const struct nfs4_layoutcommit_args *args = priv;
3054 struct nfs4_layoutcommit_data *data =
3055 container_of(args, struct nfs4_layoutcommit_data, args);
3056 struct compound_hdr hdr = {
3057 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3058 };
3059
3060 encode_compound_hdr(xdr, req, &hdr);
3061 encode_sequence(xdr, &args->seq_args, &hdr);
3062 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3063 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3064 encode_getfattr(xdr, args->bitmask, &hdr);
3065 encode_nops(&hdr);
3066 }
3067
3068 /*
3069 * Encode LAYOUTRETURN request
3070 */
3071 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3072 struct xdr_stream *xdr,
3073 const void *data)
3074 {
3075 const struct nfs4_layoutreturn_args *args = data;
3076 struct compound_hdr hdr = {
3077 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3078 };
3079
3080 encode_compound_hdr(xdr, req, &hdr);
3081 encode_sequence(xdr, &args->seq_args, &hdr);
3082 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3083 encode_layoutreturn(xdr, args, &hdr);
3084 encode_nops(&hdr);
3085 }
3086
3087 /*
3088 * Encode SECINFO_NO_NAME request
3089 */
3090 static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3091 struct xdr_stream *xdr,
3092 const void *data)
3093 {
3094 const struct nfs41_secinfo_no_name_args *args = data;
3095 struct compound_hdr hdr = {
3096 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3097 };
3098
3099 encode_compound_hdr(xdr, req, &hdr);
3100 encode_sequence(xdr, &args->seq_args, &hdr);
3101 encode_putrootfh(xdr, &hdr);
3102 encode_secinfo_no_name(xdr, args, &hdr);
3103 encode_nops(&hdr);
3104 }
3105
3106 /*
3107 * Encode TEST_STATEID request
3108 */
3109 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3110 struct xdr_stream *xdr,
3111 const void *data)
3112 {
3113 const struct nfs41_test_stateid_args *args = data;
3114 struct compound_hdr hdr = {
3115 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3116 };
3117
3118 encode_compound_hdr(xdr, req, &hdr);
3119 encode_sequence(xdr, &args->seq_args, &hdr);
3120 encode_test_stateid(xdr, args, &hdr);
3121 encode_nops(&hdr);
3122 }
3123
3124 /*
3125 * Encode FREE_STATEID request
3126 */
3127 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3128 struct xdr_stream *xdr,
3129 const void *data)
3130 {
3131 const struct nfs41_free_stateid_args *args = data;
3132 struct compound_hdr hdr = {
3133 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3134 };
3135
3136 encode_compound_hdr(xdr, req, &hdr);
3137 encode_sequence(xdr, &args->seq_args, &hdr);
3138 encode_free_stateid(xdr, args, &hdr);
3139 encode_nops(&hdr);
3140 }
3141 #endif /* CONFIG_NFS_V4_1 */
3142
3143 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3144 {
3145 ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3146 NFS4_OPAQUE_LIMIT);
3147 if (unlikely(ret < 0))
3148 return -EIO;
3149 *len = ret;
3150 return 0;
3151 }
3152
3153 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3154 {
3155 __be32 *p;
3156
3157 p = xdr_inline_decode(xdr, 8);
3158 if (unlikely(!p))
3159 return -EIO;
3160 hdr->status = be32_to_cpup(p++);
3161 hdr->taglen = be32_to_cpup(p);
3162
3163 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3164 if (unlikely(!p))
3165 return -EIO;
3166 hdr->tag = (char *)p;
3167 p += XDR_QUADLEN(hdr->taglen);
3168 hdr->nops = be32_to_cpup(p);
3169 if (unlikely(hdr->nops < 1))
3170 return nfs4_stat_to_errno(hdr->status);
3171 return 0;
3172 }
3173
3174 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3175 int *nfs_retval)
3176 {
3177 __be32 *p;
3178 uint32_t opnum;
3179 int32_t nfserr;
3180
3181 p = xdr_inline_decode(xdr, 8);
3182 if (unlikely(!p))
3183 goto out_overflow;
3184 opnum = be32_to_cpup(p++);
3185 if (unlikely(opnum != expected))
3186 goto out_bad_operation;
3187 if (unlikely(*p != cpu_to_be32(NFS_OK)))
3188 goto out_status;
3189 *nfs_retval = 0;
3190 return true;
3191 out_status:
3192 nfserr = be32_to_cpup(p);
3193 trace_nfs4_xdr_status(xdr, opnum, nfserr);
3194 *nfs_retval = nfs4_stat_to_errno(nfserr);
3195 return true;
3196 out_bad_operation:
3197 dprintk("nfs: Server returned operation"
3198 " %d but we issued a request for %d\n",
3199 opnum, expected);
3200 *nfs_retval = -EREMOTEIO;
3201 return false;
3202 out_overflow:
3203 *nfs_retval = -EIO;
3204 return false;
3205 }
3206
3207 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3208 {
3209 int retval;
3210
3211 __decode_op_hdr(xdr, expected, &retval);
3212 return retval;
3213 }
3214
3215 /* Dummy routine */
3216 static int decode_ace(struct xdr_stream *xdr, void *ace)
3217 {
3218 __be32 *p;
3219 unsigned int strlen;
3220 char *str;
3221
3222 p = xdr_inline_decode(xdr, 12);
3223 if (unlikely(!p))
3224 return -EIO;
3225 return decode_opaque_inline(xdr, &strlen, &str);
3226 }
3227
3228 static ssize_t
3229 decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
3230 {
3231 ssize_t ret;
3232
3233 ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
3234 if (likely(ret >= 0))
3235 return ret;
3236 if (ret != -EMSGSIZE)
3237 return -EIO;
3238 return sz;
3239 }
3240
3241 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3242 {
3243 ssize_t ret;
3244 ret = decode_bitmap4(xdr, bitmap, 3);
3245 return ret < 0 ? ret : 0;
3246 }
3247
3248 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3249 {
3250 __be32 *p;
3251
3252 p = xdr_inline_decode(xdr, 4);
3253 if (unlikely(!p))
3254 return -EIO;
3255 *attrlen = be32_to_cpup(p);
3256 *savep = xdr_stream_pos(xdr);
3257 return 0;
3258 }
3259
3260 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3261 {
3262 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3263 int ret;
3264 ret = decode_attr_bitmap(xdr, bitmask);
3265 if (unlikely(ret < 0))
3266 return ret;
3267 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3268 } else
3269 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3270 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3271 bitmask[0], bitmask[1], bitmask[2]);
3272 return 0;
3273 }
3274
3275 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3276 {
3277 __be32 *p;
3278 int ret = 0;
3279
3280 *type = 0;
3281 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3282 return -EIO;
3283 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3284 p = xdr_inline_decode(xdr, 4);
3285 if (unlikely(!p))
3286 return -EIO;
3287 *type = be32_to_cpup(p);
3288 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3289 dprintk("%s: bad type %d\n", __func__, *type);
3290 return -EIO;
3291 }
3292 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3293 ret = NFS_ATTR_FATTR_TYPE;
3294 }
3295 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3296 return ret;
3297 }
3298
3299 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3300 uint32_t *bitmap, uint32_t *type)
3301 {
3302 __be32 *p;
3303
3304 *type = 0;
3305 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3306 return -EIO;
3307 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3308 p = xdr_inline_decode(xdr, 4);
3309 if (unlikely(!p))
3310 return -EIO;
3311 *type = be32_to_cpup(p);
3312 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3313 }
3314 dprintk("%s: expire type=0x%x\n", __func__, *type);
3315 return 0;
3316 }
3317
3318 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3319 {
3320 __be32 *p;
3321 int ret = 0;
3322
3323 *change = 0;
3324 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3325 return -EIO;
3326 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3327 p = xdr_inline_decode(xdr, 8);
3328 if (unlikely(!p))
3329 return -EIO;
3330 xdr_decode_hyper(p, change);
3331 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3332 ret = NFS_ATTR_FATTR_CHANGE;
3333 }
3334 dprintk("%s: change attribute=%Lu\n", __func__,
3335 (unsigned long long)*change);
3336 return ret;
3337 }
3338
3339 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3340 {
3341 __be32 *p;
3342 int ret = 0;
3343
3344 *size = 0;
3345 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3346 return -EIO;
3347 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3348 p = xdr_inline_decode(xdr, 8);
3349 if (unlikely(!p))
3350 return -EIO;
3351 xdr_decode_hyper(p, size);
3352 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3353 ret = NFS_ATTR_FATTR_SIZE;
3354 }
3355 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3356 return ret;
3357 }
3358
3359 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3360 {
3361 __be32 *p;
3362
3363 *res = 0;
3364 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3365 return -EIO;
3366 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3367 p = xdr_inline_decode(xdr, 4);
3368 if (unlikely(!p))
3369 return -EIO;
3370 *res = be32_to_cpup(p);
3371 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3372 }
3373 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3374 return 0;
3375 }
3376
3377 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3378 {
3379 __be32 *p;
3380
3381 *res = 0;
3382 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3383 return -EIO;
3384 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3385 p = xdr_inline_decode(xdr, 4);
3386 if (unlikely(!p))
3387 return -EIO;
3388 *res = be32_to_cpup(p);
3389 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3390 }
3391 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3392 return 0;
3393 }
3394
3395 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3396 {
3397 __be32 *p;
3398 int ret = 0;
3399
3400 fsid->major = 0;
3401 fsid->minor = 0;
3402 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3403 return -EIO;
3404 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3405 p = xdr_inline_decode(xdr, 16);
3406 if (unlikely(!p))
3407 return -EIO;
3408 p = xdr_decode_hyper(p, &fsid->major);
3409 xdr_decode_hyper(p, &fsid->minor);
3410 bitmap[0] &= ~FATTR4_WORD0_FSID;
3411 ret = NFS_ATTR_FATTR_FSID;
3412 }
3413 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3414 (unsigned long long)fsid->major,
3415 (unsigned long long)fsid->minor);
3416 return ret;
3417 }
3418
3419 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3420 {
3421 __be32 *p;
3422
3423 *res = 60;
3424 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3425 return -EIO;
3426 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3427 p = xdr_inline_decode(xdr, 4);
3428 if (unlikely(!p))
3429 return -EIO;
3430 *res = be32_to_cpup(p);
3431 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3432 }
3433 dprintk("%s: lease time=%u\n", __func__, (unsigned int)*res);
3434 return 0;
3435 }
3436
3437 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3438 {
3439 __be32 *p;
3440
3441 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3442 return -EIO;
3443 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3444 p = xdr_inline_decode(xdr, 4);
3445 if (unlikely(!p))
3446 return -EIO;
3447 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3448 *res = -be32_to_cpup(p);
3449 }
3450 return 0;
3451 }
3452
3453 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3454 uint32_t *bitmap, uint32_t *bitmask)
3455 {
3456 if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3457 int ret;
3458 ret = decode_attr_bitmap(xdr, bitmask);
3459 if (unlikely(ret < 0))
3460 return ret;
3461 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3462 } else
3463 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3464 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3465 bitmask[0], bitmask[1], bitmask[2]);
3466 return 0;
3467 }
3468
3469 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3470 {
3471 __be32 *p;
3472 u32 len;
3473
3474 if (fh != NULL)
3475 memset(fh, 0, sizeof(*fh));
3476
3477 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3478 return -EIO;
3479 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3480 p = xdr_inline_decode(xdr, 4);
3481 if (unlikely(!p))
3482 return -EIO;
3483 len = be32_to_cpup(p);
3484 if (len > NFS4_FHSIZE)
3485 return -EIO;
3486 p = xdr_inline_decode(xdr, len);
3487 if (unlikely(!p))
3488 return -EIO;
3489 if (fh != NULL) {
3490 memcpy(fh->data, p, len);
3491 fh->size = len;
3492 }
3493 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3494 }
3495 return 0;
3496 }
3497
3498 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3499 {
3500 __be32 *p;
3501
3502 *res = 0;
3503 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3504 return -EIO;
3505 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3506 p = xdr_inline_decode(xdr, 4);
3507 if (unlikely(!p))
3508 return -EIO;
3509 *res = be32_to_cpup(p);
3510 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3511 }
3512 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3513 return 0;
3514 }
3515
3516 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3517 {
3518 __be32 *p;
3519 int ret = 0;
3520
3521 *fileid = 0;
3522 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3523 return -EIO;
3524 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3525 p = xdr_inline_decode(xdr, 8);
3526 if (unlikely(!p))
3527 return -EIO;
3528 xdr_decode_hyper(p, fileid);
3529 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3530 ret = NFS_ATTR_FATTR_FILEID;
3531 }
3532 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3533 return ret;
3534 }
3535
3536 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3537 {
3538 __be32 *p;
3539 int ret = 0;
3540
3541 *fileid = 0;
3542 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3543 return -EIO;
3544 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3545 p = xdr_inline_decode(xdr, 8);
3546 if (unlikely(!p))
3547 return -EIO;
3548 xdr_decode_hyper(p, fileid);
3549 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3550 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3551 }
3552 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3553 return ret;
3554 }
3555
3556 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3557 {
3558 __be32 *p;
3559 int status = 0;
3560
3561 *res = 0;
3562 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3563 return -EIO;
3564 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3565 p = xdr_inline_decode(xdr, 8);
3566 if (unlikely(!p))
3567 return -EIO;
3568 xdr_decode_hyper(p, res);
3569 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3570 }
3571 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3572 return status;
3573 }
3574
3575 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3576 {
3577 __be32 *p;
3578 int status = 0;
3579
3580 *res = 0;
3581 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3582 return -EIO;
3583 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3584 p = xdr_inline_decode(xdr, 8);
3585 if (unlikely(!p))
3586 return -EIO;
3587 xdr_decode_hyper(p, res);
3588 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3589 }
3590 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3591 return status;
3592 }
3593
3594 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3595 {
3596 __be32 *p;
3597 int status = 0;
3598
3599 *res = 0;
3600 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3601 return -EIO;
3602 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3603 p = xdr_inline_decode(xdr, 8);
3604 if (unlikely(!p))
3605 return -EIO;
3606 xdr_decode_hyper(p, res);
3607 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3608 }
3609 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3610 return status;
3611 }
3612
3613 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3614 {
3615 u32 n;
3616 __be32 *p;
3617 int status = 0;
3618
3619 p = xdr_inline_decode(xdr, 4);
3620 if (unlikely(!p))
3621 return -EIO;
3622 n = be32_to_cpup(p);
3623 if (n == 0)
3624 goto root_path;
3625 dprintk("pathname4: ");
3626 if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3627 dprintk("cannot parse %d components in path\n", n);
3628 goto out_eio;
3629 }
3630 for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3631 struct nfs4_string *component = &path->components[path->ncomponents];
3632 status = decode_opaque_inline(xdr, &component->len, &component->data);
3633 if (unlikely(status != 0))
3634 goto out_eio;
3635 ifdebug (XDR)
3636 pr_cont("%s%.*s ",
3637 (path->ncomponents != n ? "/ " : ""),
3638 component->len, component->data);
3639 }
3640 out:
3641 return status;
3642 root_path:
3643 /* a root pathname is sent as a zero component4 */
3644 path->ncomponents = 1;
3645 path->components[0].len=0;
3646 path->components[0].data=NULL;
3647 dprintk("pathname4: /\n");
3648 goto out;
3649 out_eio:
3650 dprintk(" status %d", status);
3651 status = -EIO;
3652 goto out;
3653 }
3654
3655 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3656 {
3657 int n;
3658 __be32 *p;
3659 int status = -EIO;
3660
3661 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3662 goto out;
3663 status = 0;
3664 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3665 goto out;
3666 bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3667 status = -EIO;
3668 /* Ignore borken servers that return unrequested attrs */
3669 if (unlikely(res == NULL))
3670 goto out;
3671 dprintk("%s: fsroot:\n", __func__);
3672 status = decode_pathname(xdr, &res->fs_path);
3673 if (unlikely(status != 0))
3674 goto out;
3675 p = xdr_inline_decode(xdr, 4);
3676 if (unlikely(!p))
3677 goto out_eio;
3678 n = be32_to_cpup(p);
3679 if (n <= 0)
3680 goto out_eio;
3681 for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3682 u32 m;
3683 struct nfs4_fs_location *loc;
3684
3685 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3686 break;
3687 loc = &res->locations[res->nlocations];
3688 p = xdr_inline_decode(xdr, 4);
3689 if (unlikely(!p))
3690 goto out_eio;
3691 m = be32_to_cpup(p);
3692
3693 dprintk("%s: servers:\n", __func__);
3694 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3695 struct nfs4_string *server;
3696
3697 if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3698 unsigned int i;
3699 dprintk("%s: using first %u of %u servers "
3700 "returned for location %u\n",
3701 __func__,
3702 NFS4_FS_LOCATION_MAXSERVERS,
3703 m, res->nlocations);
3704 for (i = loc->nservers; i < m; i++) {
3705 unsigned int len;
3706 char *data;
3707 status = decode_opaque_inline(xdr, &len, &data);
3708 if (unlikely(status != 0))
3709 goto out_eio;
3710 }
3711 break;
3712 }
3713 server = &loc->servers[loc->nservers];
3714 status = decode_opaque_inline(xdr, &server->len, &server->data);
3715 if (unlikely(status != 0))
3716 goto out_eio;
3717 dprintk("%s ", server->data);
3718 }
3719 status = decode_pathname(xdr, &loc->rootpath);
3720 if (unlikely(status != 0))
3721 goto out_eio;
3722 }
3723 if (res->nlocations != 0)
3724 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3725 out:
3726 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3727 return status;
3728 out_eio:
3729 status = -EIO;
3730 goto out;
3731 }
3732
3733 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3734 {
3735 __be32 *p;
3736 int status = 0;
3737
3738 *res = 0;
3739 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3740 return -EIO;
3741 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3742 p = xdr_inline_decode(xdr, 8);
3743 if (unlikely(!p))
3744 return -EIO;
3745 xdr_decode_hyper(p, res);
3746 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3747 }
3748 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3749 return status;
3750 }
3751
3752 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3753 {
3754 __be32 *p;
3755 int status = 0;
3756
3757 *maxlink = 1;
3758 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3759 return -EIO;
3760 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3761 p = xdr_inline_decode(xdr, 4);
3762 if (unlikely(!p))
3763 return -EIO;
3764 *maxlink = be32_to_cpup(p);
3765 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3766 }
3767 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3768 return status;
3769 }
3770
3771 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3772 {
3773 __be32 *p;
3774 int status = 0;
3775
3776 *maxname = 1024;
3777 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3778 return -EIO;
3779 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3780 p = xdr_inline_decode(xdr, 4);
3781 if (unlikely(!p))
3782 return -EIO;
3783 *maxname = be32_to_cpup(p);
3784 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3785 }
3786 dprintk("%s: maxname=%u\n", __func__, *maxname);
3787 return status;
3788 }
3789
3790 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3791 {
3792 __be32 *p;
3793 int status = 0;
3794
3795 *res = 1024;
3796 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3797 return -EIO;
3798 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3799 uint64_t maxread;
3800 p = xdr_inline_decode(xdr, 8);
3801 if (unlikely(!p))
3802 return -EIO;
3803 xdr_decode_hyper(p, &maxread);
3804 if (maxread > 0x7FFFFFFF)
3805 maxread = 0x7FFFFFFF;
3806 *res = (uint32_t)maxread;
3807 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3808 }
3809 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3810 return status;
3811 }
3812
3813 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3814 {
3815 __be32 *p;
3816 int status = 0;
3817
3818 *res = 1024;
3819 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3820 return -EIO;
3821 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3822 uint64_t maxwrite;
3823 p = xdr_inline_decode(xdr, 8);
3824 if (unlikely(!p))
3825 return -EIO;
3826 xdr_decode_hyper(p, &maxwrite);
3827 if (maxwrite > 0x7FFFFFFF)
3828 maxwrite = 0x7FFFFFFF;
3829 *res = (uint32_t)maxwrite;
3830 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3831 }
3832 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3833 return status;
3834 }
3835
3836 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3837 {
3838 uint32_t tmp;
3839 __be32 *p;
3840 int ret = 0;
3841
3842 *mode = 0;
3843 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3844 return -EIO;
3845 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3846 p = xdr_inline_decode(xdr, 4);
3847 if (unlikely(!p))
3848 return -EIO;
3849 tmp = be32_to_cpup(p);
3850 *mode = tmp & ~S_IFMT;
3851 bitmap[1] &= ~FATTR4_WORD1_MODE;
3852 ret = NFS_ATTR_FATTR_MODE;
3853 }
3854 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3855 return ret;
3856 }
3857
3858 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3859 {
3860 __be32 *p;
3861 int ret = 0;
3862
3863 *nlink = 1;
3864 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3865 return -EIO;
3866 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3867 p = xdr_inline_decode(xdr, 4);
3868 if (unlikely(!p))
3869 return -EIO;
3870 *nlink = be32_to_cpup(p);
3871 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3872 ret = NFS_ATTR_FATTR_NLINK;
3873 }
3874 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3875 return ret;
3876 }
3877
3878 static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3879 struct nfs4_string *name, gfp_t gfp_flags)
3880 {
3881 ssize_t ret;
3882
3883 ret = xdr_stream_decode_string_dup(xdr, &name->data,
3884 XDR_MAX_NETOBJ, gfp_flags);
3885 name->len = 0;
3886 if (ret > 0)
3887 name->len = ret;
3888 return ret;
3889 }
3890
3891 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3892 const struct nfs_server *server, kuid_t *uid,
3893 struct nfs4_string *owner_name)
3894 {
3895 ssize_t len;
3896 char *p;
3897
3898 *uid = make_kuid(&init_user_ns, -2);
3899 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3900 return -EIO;
3901 if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3902 return 0;
3903 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3904
3905 if (owner_name != NULL) {
3906 len = decode_nfs4_string(xdr, owner_name, GFP_NOIO);
3907 if (len <= 0)
3908 goto out;
3909 dprintk("%s: name=%s\n", __func__, owner_name->data);
3910 return NFS_ATTR_FATTR_OWNER_NAME;
3911 } else {
3912 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3913 XDR_MAX_NETOBJ);
3914 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3915 goto out;
3916 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3917 return NFS_ATTR_FATTR_OWNER;
3918 }
3919 out:
3920 if (len == -EBADMSG)
3921 return -EIO;
3922 return 0;
3923 }
3924
3925 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3926 const struct nfs_server *server, kgid_t *gid,
3927 struct nfs4_string *group_name)
3928 {
3929 ssize_t len;
3930 char *p;
3931
3932 *gid = make_kgid(&init_user_ns, -2);
3933 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3934 return -EIO;
3935 if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
3936 return 0;
3937 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3938
3939 if (group_name != NULL) {
3940 len = decode_nfs4_string(xdr, group_name, GFP_NOIO);
3941 if (len <= 0)
3942 goto out;
3943 dprintk("%s: name=%s\n", __func__, group_name->data);
3944 return NFS_ATTR_FATTR_GROUP_NAME;
3945 } else {
3946 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3947 XDR_MAX_NETOBJ);
3948 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
3949 goto out;
3950 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3951 return NFS_ATTR_FATTR_GROUP;
3952 }
3953 out:
3954 if (len == -EBADMSG)
3955 return -EIO;
3956 return 0;
3957 }
3958
3959 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3960 {
3961 uint32_t major = 0, minor = 0;
3962 __be32 *p;
3963 int ret = 0;
3964
3965 *rdev = MKDEV(0,0);
3966 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3967 return -EIO;
3968 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3969 dev_t tmp;
3970
3971 p = xdr_inline_decode(xdr, 8);
3972 if (unlikely(!p))
3973 return -EIO;
3974 major = be32_to_cpup(p++);
3975 minor = be32_to_cpup(p);
3976 tmp = MKDEV(major, minor);
3977 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3978 *rdev = tmp;
3979 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3980 ret = NFS_ATTR_FATTR_RDEV;
3981 }
3982 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3983 return ret;
3984 }
3985
3986 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3987 {
3988 __be32 *p;
3989 int status = 0;
3990
3991 *res = 0;
3992 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3993 return -EIO;
3994 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3995 p = xdr_inline_decode(xdr, 8);
3996 if (unlikely(!p))
3997 return -EIO;
3998 xdr_decode_hyper(p, res);
3999 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4000 }
4001 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4002 return status;
4003 }
4004
4005 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4006 {
4007 __be32 *p;
4008 int status = 0;
4009
4010 *res = 0;
4011 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4012 return -EIO;
4013 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4014 p = xdr_inline_decode(xdr, 8);
4015 if (unlikely(!p))
4016 return -EIO;
4017 xdr_decode_hyper(p, res);
4018 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4019 }
4020 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4021 return status;
4022 }
4023
4024 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4025 {
4026 __be32 *p;
4027 int status = 0;
4028
4029 *res = 0;
4030 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4031 return -EIO;
4032 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4033 p = xdr_inline_decode(xdr, 8);
4034 if (unlikely(!p))
4035 return -EIO;
4036 xdr_decode_hyper(p, res);
4037 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4038 }
4039 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4040 return status;
4041 }
4042
4043 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4044 {
4045 __be32 *p;
4046 int ret = 0;
4047
4048 *used = 0;
4049 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4050 return -EIO;
4051 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4052 p = xdr_inline_decode(xdr, 8);
4053 if (unlikely(!p))
4054 return -EIO;
4055 xdr_decode_hyper(p, used);
4056 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4057 ret = NFS_ATTR_FATTR_SPACE_USED;
4058 }
4059 dprintk("%s: space used=%Lu\n", __func__,
4060 (unsigned long long)*used);
4061 return ret;
4062 }
4063
4064 static __be32 *
4065 xdr_decode_nfstime4(__be32 *p, struct timespec64 *t)
4066 {
4067 __u64 sec;
4068
4069 p = xdr_decode_hyper(p, &sec);
4070 t-> tv_sec = sec;
4071 t->tv_nsec = be32_to_cpup(p++);
4072 return p;
4073 }
4074
4075 static int decode_attr_time(struct xdr_stream *xdr, struct timespec64 *time)
4076 {
4077 __be32 *p;
4078
4079 p = xdr_inline_decode(xdr, nfstime4_maxsz << 2);
4080 if (unlikely(!p))
4081 return -EIO;
4082 xdr_decode_nfstime4(p, time);
4083 return 0;
4084 }
4085
4086 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4087 {
4088 int status = 0;
4089
4090 time->tv_sec = 0;
4091 time->tv_nsec = 0;
4092 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4093 return -EIO;
4094 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4095 status = decode_attr_time(xdr, time);
4096 if (status == 0)
4097 status = NFS_ATTR_FATTR_ATIME;
4098 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4099 }
4100 dprintk("%s: atime=%lld\n", __func__, time->tv_sec);
4101 return status;
4102 }
4103
4104 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4105 {
4106 int status = 0;
4107
4108 time->tv_sec = 0;
4109 time->tv_nsec = 0;
4110 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4111 return -EIO;
4112 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4113 status = decode_attr_time(xdr, time);
4114 if (status == 0)
4115 status = NFS_ATTR_FATTR_CTIME;
4116 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4117 }
4118 dprintk("%s: ctime=%lld\n", __func__, time->tv_sec);
4119 return status;
4120 }
4121
4122 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4123 struct timespec64 *time)
4124 {
4125 int status = 0;
4126
4127 time->tv_sec = 0;
4128 time->tv_nsec = 0;
4129 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4130 return -EIO;
4131 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4132 status = decode_attr_time(xdr, time);
4133 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4134 }
4135 dprintk("%s: time_delta=%lld %ld\n", __func__, time->tv_sec,
4136 time->tv_nsec);
4137 return status;
4138 }
4139
4140 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4141 struct nfs4_label *label)
4142 {
4143 uint32_t pi = 0;
4144 uint32_t lfs = 0;
4145 __u32 len;
4146 __be32 *p;
4147 int status = 0;
4148
4149 if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4150 return -EIO;
4151 if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4152 p = xdr_inline_decode(xdr, 4);
4153 if (unlikely(!p))
4154 return -EIO;
4155 lfs = be32_to_cpup(p++);
4156 p = xdr_inline_decode(xdr, 4);
4157 if (unlikely(!p))
4158 return -EIO;
4159 pi = be32_to_cpup(p++);
4160 p = xdr_inline_decode(xdr, 4);
4161 if (unlikely(!p))
4162 return -EIO;
4163 len = be32_to_cpup(p++);
4164 p = xdr_inline_decode(xdr, len);
4165 if (unlikely(!p))
4166 return -EIO;
4167 if (len < NFS4_MAXLABELLEN) {
4168 if (label) {
4169 memcpy(label->label, p, len);
4170 label->len = len;
4171 label->pi = pi;
4172 label->lfs = lfs;
4173 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4174 }
4175 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4176 } else
4177 printk(KERN_WARNING "%s: label too long (%u)!\n",
4178 __func__, len);
4179 }
4180 if (label && label->label)
4181 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4182 (char *)label->label, label->len, label->pi, label->lfs);
4183 return status;
4184 }
4185
4186 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4187 {
4188 int status = 0;
4189
4190 time->tv_sec = 0;
4191 time->tv_nsec = 0;
4192 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4193 return -EIO;
4194 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4195 status = decode_attr_time(xdr, time);
4196 if (status == 0)
4197 status = NFS_ATTR_FATTR_MTIME;
4198 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4199 }
4200 dprintk("%s: mtime=%lld\n", __func__, time->tv_sec);
4201 return status;
4202 }
4203
4204 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4205 {
4206 unsigned int attrwords = XDR_QUADLEN(attrlen);
4207 unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4208
4209 if (unlikely(attrwords != nwords)) {
4210 dprintk("%s: server returned incorrect attribute length: "
4211 "%u %c %u\n",
4212 __func__,
4213 attrwords << 2,
4214 (attrwords < nwords) ? '<' : '>',
4215 nwords << 2);
4216 return -EIO;
4217 }
4218 return 0;
4219 }
4220
4221 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4222 {
4223 __be32 *p;
4224
4225 p = xdr_inline_decode(xdr, 20);
4226 if (unlikely(!p))
4227 return -EIO;
4228 cinfo->atomic = be32_to_cpup(p++);
4229 p = xdr_decode_hyper(p, &cinfo->before);
4230 xdr_decode_hyper(p, &cinfo->after);
4231 return 0;
4232 }
4233
4234 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4235 {
4236 __be32 *p;
4237 uint32_t supp, acc;
4238 int status;
4239
4240 status = decode_op_hdr(xdr, OP_ACCESS);
4241 if (status)
4242 return status;
4243 p = xdr_inline_decode(xdr, 8);
4244 if (unlikely(!p))
4245 return -EIO;
4246 supp = be32_to_cpup(p++);
4247 acc = be32_to_cpup(p);
4248 *supported = supp;
4249 *access = acc;
4250 return 0;
4251 }
4252
4253 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4254 {
4255 ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4256 if (unlikely(ret < 0))
4257 return -EIO;
4258 return 0;
4259 }
4260
4261 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4262 {
4263 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4264 }
4265
4266 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4267 {
4268 stateid->type = NFS4_OPEN_STATEID_TYPE;
4269 return decode_stateid(xdr, stateid);
4270 }
4271
4272 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4273 {
4274 stateid->type = NFS4_LOCK_STATEID_TYPE;
4275 return decode_stateid(xdr, stateid);
4276 }
4277
4278 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4279 {
4280 stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4281 return decode_stateid(xdr, stateid);
4282 }
4283
4284 static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4285 {
4286 nfs4_stateid dummy;
4287
4288 nfs4_stateid_copy(stateid, &invalid_stateid);
4289 return decode_stateid(xdr, &dummy);
4290 }
4291
4292 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4293 {
4294 int status;
4295
4296 status = decode_op_hdr(xdr, OP_CLOSE);
4297 if (status != -EIO)
4298 nfs_increment_open_seqid(status, res->seqid);
4299 if (!status)
4300 status = decode_invalid_stateid(xdr, &res->stateid);
4301 return status;
4302 }
4303
4304 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4305 {
4306 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4307 }
4308
4309 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4310 {
4311 return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4312 }
4313
4314 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4315 {
4316 struct nfs_writeverf *verf = res->verf;
4317 int status;
4318
4319 status = decode_op_hdr(xdr, OP_COMMIT);
4320 if (!status)
4321 status = decode_write_verifier(xdr, &verf->verifier);
4322 if (!status)
4323 verf->committed = NFS_FILE_SYNC;
4324 return status;
4325 }
4326
4327 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4328 {
4329 __be32 *p;
4330 uint32_t bmlen;
4331 int status;
4332
4333 status = decode_op_hdr(xdr, OP_CREATE);
4334 if (status)
4335 return status;
4336 if ((status = decode_change_info(xdr, cinfo)))
4337 return status;
4338 p = xdr_inline_decode(xdr, 4);
4339 if (unlikely(!p))
4340 return -EIO;
4341 bmlen = be32_to_cpup(p);
4342 p = xdr_inline_decode(xdr, bmlen << 2);
4343 if (likely(p))
4344 return 0;
4345 return -EIO;
4346 }
4347
4348 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4349 {
4350 unsigned int savep;
4351 uint32_t attrlen, bitmap[3] = {0};
4352 int status;
4353
4354 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4355 goto xdr_error;
4356 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4357 goto xdr_error;
4358 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4359 goto xdr_error;
4360 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4361 goto xdr_error;
4362 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4363 &res->fh_expire_type)) != 0)
4364 goto xdr_error;
4365 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4366 goto xdr_error;
4367 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4368 goto xdr_error;
4369 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4370 goto xdr_error;
4371 if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4372 res->exclcreat_bitmask)) != 0)
4373 goto xdr_error;
4374 status = verify_attr_len(xdr, savep, attrlen);
4375 xdr_error:
4376 dprintk("%s: xdr returned %d!\n", __func__, -status);
4377 return status;
4378 }
4379
4380 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4381 {
4382 unsigned int savep;
4383 uint32_t attrlen, bitmap[3] = {0};
4384 int status;
4385
4386 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4387 goto xdr_error;
4388 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4389 goto xdr_error;
4390 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4391 goto xdr_error;
4392
4393 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4394 goto xdr_error;
4395 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4396 goto xdr_error;
4397 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4398 goto xdr_error;
4399
4400 status = -EIO;
4401 if (unlikely(bitmap[0]))
4402 goto xdr_error;
4403
4404 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4405 goto xdr_error;
4406 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4407 goto xdr_error;
4408 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4409 goto xdr_error;
4410
4411 status = verify_attr_len(xdr, savep, attrlen);
4412 xdr_error:
4413 dprintk("%s: xdr returned %d!\n", __func__, -status);
4414 return status;
4415 }
4416
4417 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4418 {
4419 unsigned int savep;
4420 uint32_t attrlen, bitmap[3] = {0};
4421 int status;
4422
4423 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4424 goto xdr_error;
4425 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4426 goto xdr_error;
4427 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4428 goto xdr_error;
4429
4430 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4431 goto xdr_error;
4432 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4433 goto xdr_error;
4434
4435 status = verify_attr_len(xdr, savep, attrlen);
4436 xdr_error:
4437 dprintk("%s: xdr returned %d!\n", __func__, -status);
4438 return status;
4439 }
4440
4441 static int decode_threshold_hint(struct xdr_stream *xdr,
4442 uint32_t *bitmap,
4443 uint64_t *res,
4444 uint32_t hint_bit)
4445 {
4446 __be32 *p;
4447
4448 *res = 0;
4449 if (likely(bitmap[0] & hint_bit)) {
4450 p = xdr_inline_decode(xdr, 8);
4451 if (unlikely(!p))
4452 return -EIO;
4453 xdr_decode_hyper(p, res);
4454 }
4455 return 0;
4456 }
4457
4458 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4459 struct nfs4_threshold *res)
4460 {
4461 __be32 *p;
4462 unsigned int savep;
4463 uint32_t bitmap[3] = {0,}, attrlen;
4464 int status;
4465
4466 /* layout type */
4467 p = xdr_inline_decode(xdr, 4);
4468 if (unlikely(!p))
4469 return -EIO;
4470 res->l_type = be32_to_cpup(p);
4471
4472 /* thi_hintset bitmap */
4473 status = decode_attr_bitmap(xdr, bitmap);
4474 if (status < 0)
4475 goto xdr_error;
4476
4477 /* thi_hintlist length */
4478 status = decode_attr_length(xdr, &attrlen, &savep);
4479 if (status < 0)
4480 goto xdr_error;
4481 /* thi_hintlist */
4482 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4483 if (status < 0)
4484 goto xdr_error;
4485 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4486 if (status < 0)
4487 goto xdr_error;
4488 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4489 THRESHOLD_RD_IO);
4490 if (status < 0)
4491 goto xdr_error;
4492 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4493 THRESHOLD_WR_IO);
4494 if (status < 0)
4495 goto xdr_error;
4496
4497 status = verify_attr_len(xdr, savep, attrlen);
4498 res->bm = bitmap[0];
4499
4500 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4501 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4502 res->wr_io_sz);
4503 xdr_error:
4504 dprintk("%s ret=%d!\n", __func__, status);
4505 return status;
4506 }
4507
4508 /*
4509 * Thresholds on pNFS direct I/O vrs MDS I/O
4510 */
4511 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4512 uint32_t *bitmap,
4513 struct nfs4_threshold *res)
4514 {
4515 __be32 *p;
4516 int status = 0;
4517 uint32_t num;
4518
4519 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4520 return -EIO;
4521 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4522 /* Did the server return an unrequested attribute? */
4523 if (unlikely(res == NULL))
4524 return -EREMOTEIO;
4525 p = xdr_inline_decode(xdr, 4);
4526 if (unlikely(!p))
4527 return -EIO;
4528 num = be32_to_cpup(p);
4529 if (num == 0)
4530 return 0;
4531 if (num > 1)
4532 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4533 "drivers per filesystem not supported\n",
4534 __func__);
4535
4536 status = decode_first_threshold_item4(xdr, res);
4537 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4538 }
4539 return status;
4540 }
4541
4542 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4543 struct nfs_fattr *fattr, struct nfs_fh *fh,
4544 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4545 const struct nfs_server *server)
4546 {
4547 int status;
4548 umode_t fmode = 0;
4549 uint32_t type;
4550 int32_t err;
4551
4552 status = decode_attr_type(xdr, bitmap, &type);
4553 if (status < 0)
4554 goto xdr_error;
4555 fattr->mode = 0;
4556 if (status != 0) {
4557 fattr->mode |= nfs_type2fmt[type];
4558 fattr->valid |= status;
4559 }
4560
4561 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4562 if (status < 0)
4563 goto xdr_error;
4564 fattr->valid |= status;
4565
4566 status = decode_attr_size(xdr, bitmap, &fattr->size);
4567 if (status < 0)
4568 goto xdr_error;
4569 fattr->valid |= status;
4570
4571 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4572 if (status < 0)
4573 goto xdr_error;
4574 fattr->valid |= status;
4575
4576 err = 0;
4577 status = decode_attr_error(xdr, bitmap, &err);
4578 if (status < 0)
4579 goto xdr_error;
4580
4581 status = decode_attr_filehandle(xdr, bitmap, fh);
4582 if (status < 0)
4583 goto xdr_error;
4584
4585 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4586 if (status < 0)
4587 goto xdr_error;
4588 fattr->valid |= status;
4589
4590 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4591 if (status < 0)
4592 goto xdr_error;
4593 fattr->valid |= status;
4594
4595 status = -EIO;
4596 if (unlikely(bitmap[0]))
4597 goto xdr_error;
4598
4599 status = decode_attr_mode(xdr, bitmap, &fmode);
4600 if (status < 0)
4601 goto xdr_error;
4602 if (status != 0) {
4603 fattr->mode |= fmode;
4604 fattr->valid |= status;
4605 }
4606
4607 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4608 if (status < 0)
4609 goto xdr_error;
4610 fattr->valid |= status;
4611
4612 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4613 if (status < 0)
4614 goto xdr_error;
4615 fattr->valid |= status;
4616
4617 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4618 if (status < 0)
4619 goto xdr_error;
4620 fattr->valid |= status;
4621
4622 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4623 if (status < 0)
4624 goto xdr_error;
4625 fattr->valid |= status;
4626
4627 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4628 if (status < 0)
4629 goto xdr_error;
4630 fattr->valid |= status;
4631
4632 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4633 if (status < 0)
4634 goto xdr_error;
4635 fattr->valid |= status;
4636
4637 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4638 if (status < 0)
4639 goto xdr_error;
4640 fattr->valid |= status;
4641
4642 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4643 if (status < 0)
4644 goto xdr_error;
4645 fattr->valid |= status;
4646
4647 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4648 if (status < 0)
4649 goto xdr_error;
4650 fattr->valid |= status;
4651
4652 status = -EIO;
4653 if (unlikely(bitmap[1]))
4654 goto xdr_error;
4655
4656 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4657 if (status < 0)
4658 goto xdr_error;
4659
4660 if (label) {
4661 status = decode_attr_security_label(xdr, bitmap, label);
4662 if (status < 0)
4663 goto xdr_error;
4664 fattr->valid |= status;
4665 }
4666
4667 xdr_error:
4668 dprintk("%s: xdr returned %d\n", __func__, -status);
4669 return status;
4670 }
4671
4672 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4673 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4674 struct nfs4_label *label, const struct nfs_server *server)
4675 {
4676 unsigned int savep;
4677 uint32_t attrlen,
4678 bitmap[3] = {0};
4679 int status;
4680
4681 status = decode_op_hdr(xdr, OP_GETATTR);
4682 if (status < 0)
4683 goto xdr_error;
4684
4685 status = decode_attr_bitmap(xdr, bitmap);
4686 if (status < 0)
4687 goto xdr_error;
4688
4689 status = decode_attr_length(xdr, &attrlen, &savep);
4690 if (status < 0)
4691 goto xdr_error;
4692
4693 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4694 label, server);
4695 if (status < 0)
4696 goto xdr_error;
4697
4698 status = verify_attr_len(xdr, savep, attrlen);
4699 xdr_error:
4700 dprintk("%s: xdr returned %d\n", __func__, -status);
4701 return status;
4702 }
4703
4704 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4705 struct nfs4_label *label, const struct nfs_server *server)
4706 {
4707 return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4708 }
4709
4710 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4711 const struct nfs_server *server)
4712 {
4713 return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4714 }
4715
4716 /*
4717 * Decode potentially multiple layout types.
4718 */
4719 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4720 struct nfs_fsinfo *fsinfo)
4721 {
4722 __be32 *p;
4723 uint32_t i;
4724
4725 p = xdr_inline_decode(xdr, 4);
4726 if (unlikely(!p))
4727 return -EIO;
4728 fsinfo->nlayouttypes = be32_to_cpup(p);
4729
4730 /* pNFS is not supported by the underlying file system */
4731 if (fsinfo->nlayouttypes == 0)
4732 return 0;
4733
4734 /* Decode and set first layout type, move xdr->p past unused types */
4735 p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4736 if (unlikely(!p))
4737 return -EIO;
4738
4739 /* If we get too many, then just cap it at the max */
4740 if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4741 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4742 __func__, fsinfo->nlayouttypes);
4743 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4744 }
4745
4746 for(i = 0; i < fsinfo->nlayouttypes; ++i)
4747 fsinfo->layouttype[i] = be32_to_cpup(p++);
4748 return 0;
4749 }
4750
4751 /*
4752 * The type of file system exported.
4753 * Note we must ensure that layouttype is set in any non-error case.
4754 */
4755 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4756 struct nfs_fsinfo *fsinfo)
4757 {
4758 int status = 0;
4759
4760 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4761 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4762 return -EIO;
4763 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4764 status = decode_pnfs_layout_types(xdr, fsinfo);
4765 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4766 }
4767 return status;
4768 }
4769
4770 /*
4771 * The prefered block size for layout directed io
4772 */
4773 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4774 uint32_t *res)
4775 {
4776 __be32 *p;
4777
4778 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4779 *res = 0;
4780 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4781 p = xdr_inline_decode(xdr, 4);
4782 if (unlikely(!p))
4783 return -EIO;
4784 *res = be32_to_cpup(p);
4785 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4786 }
4787 return 0;
4788 }
4789
4790 /*
4791 * The granularity of a CLONE operation.
4792 */
4793 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4794 uint32_t *res)
4795 {
4796 __be32 *p;
4797
4798 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4799 *res = 0;
4800 if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4801 p = xdr_inline_decode(xdr, 4);
4802 if (unlikely(!p))
4803 return -EIO;
4804 *res = be32_to_cpup(p);
4805 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4806 }
4807 return 0;
4808 }
4809
4810 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4811 {
4812 unsigned int savep;
4813 uint32_t attrlen, bitmap[3];
4814 int status;
4815
4816 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4817 goto xdr_error;
4818 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4819 goto xdr_error;
4820 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4821 goto xdr_error;
4822
4823 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4824
4825 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4826 goto xdr_error;
4827 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4828 goto xdr_error;
4829 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4830 goto xdr_error;
4831 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4832 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4833 goto xdr_error;
4834 fsinfo->wtpref = fsinfo->wtmax;
4835
4836 status = -EIO;
4837 if (unlikely(bitmap[0]))
4838 goto xdr_error;
4839
4840 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4841 if (status != 0)
4842 goto xdr_error;
4843 status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4844 if (status != 0)
4845 goto xdr_error;
4846
4847 status = -EIO;
4848 if (unlikely(bitmap[1]))
4849 goto xdr_error;
4850
4851 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4852 if (status)
4853 goto xdr_error;
4854 status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4855 if (status)
4856 goto xdr_error;
4857
4858 status = verify_attr_len(xdr, savep, attrlen);
4859 xdr_error:
4860 dprintk("%s: xdr returned %d!\n", __func__, -status);
4861 return status;
4862 }
4863
4864 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4865 {
4866 __be32 *p;
4867 uint32_t len;
4868 int status;
4869
4870 /* Zero handle first to allow comparisons */
4871 memset(fh, 0, sizeof(*fh));
4872
4873 status = decode_op_hdr(xdr, OP_GETFH);
4874 if (status)
4875 return status;
4876
4877 p = xdr_inline_decode(xdr, 4);
4878 if (unlikely(!p))
4879 return -EIO;
4880 len = be32_to_cpup(p);
4881 if (len > NFS4_FHSIZE)
4882 return -EIO;
4883 fh->size = len;
4884 p = xdr_inline_decode(xdr, len);
4885 if (unlikely(!p))
4886 return -EIO;
4887 memcpy(fh->data, p, len);
4888 return 0;
4889 }
4890
4891 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4892 {
4893 int status;
4894
4895 status = decode_op_hdr(xdr, OP_LINK);
4896 if (status)
4897 return status;
4898 return decode_change_info(xdr, cinfo);
4899 }
4900
4901 /*
4902 * We create the owner, so we know a proper owner.id length is 4.
4903 */
4904 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4905 {
4906 uint64_t offset, length, clientid;
4907 __be32 *p;
4908 uint32_t namelen, type;
4909
4910 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4911 if (unlikely(!p))
4912 return -EIO;
4913 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4914 p = xdr_decode_hyper(p, &length);
4915 type = be32_to_cpup(p++); /* 4 byte read */
4916 if (fl != NULL) { /* manipulate file lock */
4917 fl->fl_start = (loff_t)offset;
4918 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4919 if (length == ~(uint64_t)0)
4920 fl->fl_end = OFFSET_MAX;
4921 fl->fl_type = F_WRLCK;
4922 if (type & 1)
4923 fl->fl_type = F_RDLCK;
4924 fl->fl_pid = 0;
4925 }
4926 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4927 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4928 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4929 if (likely(!p))
4930 return -EIO;
4931 return -NFS4ERR_DENIED;
4932 }
4933
4934 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4935 {
4936 int status;
4937
4938 status = decode_op_hdr(xdr, OP_LOCK);
4939 if (status == -EIO)
4940 goto out;
4941 if (status == 0) {
4942 status = decode_lock_stateid(xdr, &res->stateid);
4943 if (unlikely(status))
4944 goto out;
4945 } else if (status == -NFS4ERR_DENIED)
4946 status = decode_lock_denied(xdr, NULL);
4947 if (res->open_seqid != NULL)
4948 nfs_increment_open_seqid(status, res->open_seqid);
4949 nfs_increment_lock_seqid(status, res->lock_seqid);
4950 out:
4951 return status;
4952 }
4953
4954 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4955 {
4956 int status;
4957 status = decode_op_hdr(xdr, OP_LOCKT);
4958 if (status == -NFS4ERR_DENIED)
4959 return decode_lock_denied(xdr, res->denied);
4960 return status;
4961 }
4962
4963 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4964 {
4965 int status;
4966
4967 status = decode_op_hdr(xdr, OP_LOCKU);
4968 if (status != -EIO)
4969 nfs_increment_lock_seqid(status, res->seqid);
4970 if (status == 0)
4971 status = decode_lock_stateid(xdr, &res->stateid);
4972 return status;
4973 }
4974
4975 static int decode_release_lockowner(struct xdr_stream *xdr)
4976 {
4977 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4978 }
4979
4980 static int decode_lookup(struct xdr_stream *xdr)
4981 {
4982 return decode_op_hdr(xdr, OP_LOOKUP);
4983 }
4984
4985 static int decode_lookupp(struct xdr_stream *xdr)
4986 {
4987 return decode_op_hdr(xdr, OP_LOOKUPP);
4988 }
4989
4990 /* This is too sick! */
4991 static int decode_space_limit(struct xdr_stream *xdr,
4992 unsigned long *pagemod_limit)
4993 {
4994 __be32 *p;
4995 uint32_t limit_type, nblocks, blocksize;
4996 u64 maxsize = 0;
4997
4998 p = xdr_inline_decode(xdr, 12);
4999 if (unlikely(!p))
5000 return -EIO;
5001 limit_type = be32_to_cpup(p++);
5002 switch (limit_type) {
5003 case NFS4_LIMIT_SIZE:
5004 xdr_decode_hyper(p, &maxsize);
5005 break;
5006 case NFS4_LIMIT_BLOCKS:
5007 nblocks = be32_to_cpup(p++);
5008 blocksize = be32_to_cpup(p);
5009 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5010 }
5011 maxsize >>= PAGE_SHIFT;
5012 *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5013 return 0;
5014 }
5015
5016 static int decode_rw_delegation(struct xdr_stream *xdr,
5017 uint32_t delegation_type,
5018 struct nfs_openres *res)
5019 {
5020 __be32 *p;
5021 int status;
5022
5023 status = decode_delegation_stateid(xdr, &res->delegation);
5024 if (unlikely(status))
5025 return status;
5026 p = xdr_inline_decode(xdr, 4);
5027 if (unlikely(!p))
5028 return -EIO;
5029 res->do_recall = be32_to_cpup(p);
5030
5031 switch (delegation_type) {
5032 case NFS4_OPEN_DELEGATE_READ:
5033 res->delegation_type = FMODE_READ;
5034 break;
5035 case NFS4_OPEN_DELEGATE_WRITE:
5036 res->delegation_type = FMODE_WRITE|FMODE_READ;
5037 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5038 return -EIO;
5039 }
5040 return decode_ace(xdr, NULL);
5041 }
5042
5043 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5044 {
5045 __be32 *p;
5046 uint32_t why_no_delegation;
5047
5048 p = xdr_inline_decode(xdr, 4);
5049 if (unlikely(!p))
5050 return -EIO;
5051 why_no_delegation = be32_to_cpup(p);
5052 switch (why_no_delegation) {
5053 case WND4_CONTENTION:
5054 case WND4_RESOURCE:
5055 xdr_inline_decode(xdr, 4);
5056 /* Ignore for now */
5057 }
5058 return 0;
5059 }
5060
5061 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5062 {
5063 __be32 *p;
5064 uint32_t delegation_type;
5065
5066 p = xdr_inline_decode(xdr, 4);
5067 if (unlikely(!p))
5068 return -EIO;
5069 delegation_type = be32_to_cpup(p);
5070 res->delegation_type = 0;
5071 switch (delegation_type) {
5072 case NFS4_OPEN_DELEGATE_NONE:
5073 return 0;
5074 case NFS4_OPEN_DELEGATE_READ:
5075 case NFS4_OPEN_DELEGATE_WRITE:
5076 return decode_rw_delegation(xdr, delegation_type, res);
5077 case NFS4_OPEN_DELEGATE_NONE_EXT:
5078 return decode_no_delegation(xdr, res);
5079 }
5080 return -EIO;
5081 }
5082
5083 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5084 {
5085 __be32 *p;
5086 uint32_t savewords, bmlen, i;
5087 int status;
5088
5089 if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5090 return status;
5091 nfs_increment_open_seqid(status, res->seqid);
5092 if (status)
5093 return status;
5094 status = decode_open_stateid(xdr, &res->stateid);
5095 if (unlikely(status))
5096 return status;
5097
5098 decode_change_info(xdr, &res->cinfo);
5099
5100 p = xdr_inline_decode(xdr, 8);
5101 if (unlikely(!p))
5102 return -EIO;
5103 res->rflags = be32_to_cpup(p++);
5104 bmlen = be32_to_cpup(p);
5105 if (bmlen > 10)
5106 goto xdr_error;
5107
5108 p = xdr_inline_decode(xdr, bmlen << 2);
5109 if (unlikely(!p))
5110 return -EIO;
5111 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5112 for (i = 0; i < savewords; ++i)
5113 res->attrset[i] = be32_to_cpup(p++);
5114 for (; i < NFS4_BITMAP_SIZE; i++)
5115 res->attrset[i] = 0;
5116
5117 return decode_delegation(xdr, res);
5118 xdr_error:
5119 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5120 return -EIO;
5121 }
5122
5123 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5124 {
5125 int status;
5126
5127 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5128 if (status != -EIO)
5129 nfs_increment_open_seqid(status, res->seqid);
5130 if (!status)
5131 status = decode_open_stateid(xdr, &res->stateid);
5132 return status;
5133 }
5134
5135 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5136 {
5137 int status;
5138
5139 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5140 if (status != -EIO)
5141 nfs_increment_open_seqid(status, res->seqid);
5142 if (!status)
5143 status = decode_open_stateid(xdr, &res->stateid);
5144 return status;
5145 }
5146
5147 static int decode_putfh(struct xdr_stream *xdr)
5148 {
5149 return decode_op_hdr(xdr, OP_PUTFH);
5150 }
5151
5152 static int decode_putrootfh(struct xdr_stream *xdr)
5153 {
5154 return decode_op_hdr(xdr, OP_PUTROOTFH);
5155 }
5156
5157 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5158 struct nfs_pgio_res *res)
5159 {
5160 __be32 *p;
5161 uint32_t count, eof, recvd;
5162 int status;
5163
5164 status = decode_op_hdr(xdr, OP_READ);
5165 if (status)
5166 return status;
5167 p = xdr_inline_decode(xdr, 8);
5168 if (unlikely(!p))
5169 return -EIO;
5170 eof = be32_to_cpup(p++);
5171 count = be32_to_cpup(p);
5172 recvd = xdr_read_pages(xdr, count);
5173 if (count > recvd) {
5174 dprintk("NFS: server cheating in read reply: "
5175 "count %u > recvd %u\n", count, recvd);
5176 count = recvd;
5177 eof = 0;
5178 }
5179 res->eof = eof;
5180 res->count = count;
5181 return 0;
5182 }
5183
5184 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5185 {
5186 int status;
5187 __be32 verf[2];
5188
5189 status = decode_op_hdr(xdr, OP_READDIR);
5190 if (!status)
5191 status = decode_verifier(xdr, readdir->verifier.data);
5192 if (unlikely(status))
5193 return status;
5194 memcpy(verf, readdir->verifier.data, sizeof(verf));
5195 dprintk("%s: verifier = %08x:%08x\n",
5196 __func__, verf[0], verf[1]);
5197 return xdr_read_pages(xdr, xdr->buf->page_len);
5198 }
5199
5200 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5201 {
5202 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5203 u32 len, recvd;
5204 __be32 *p;
5205 int status;
5206
5207 status = decode_op_hdr(xdr, OP_READLINK);
5208 if (status)
5209 return status;
5210
5211 /* Convert length of symlink */
5212 p = xdr_inline_decode(xdr, 4);
5213 if (unlikely(!p))
5214 return -EIO;
5215 len = be32_to_cpup(p);
5216 if (len >= rcvbuf->page_len || len <= 0) {
5217 dprintk("nfs: server returned giant symlink!\n");
5218 return -ENAMETOOLONG;
5219 }
5220 recvd = xdr_read_pages(xdr, len);
5221 if (recvd < len) {
5222 dprintk("NFS: server cheating in readlink reply: "
5223 "count %u > recvd %u\n", len, recvd);
5224 return -EIO;
5225 }
5226 /*
5227 * The XDR encode routine has set things up so that
5228 * the link text will be copied directly into the
5229 * buffer. We just have to do overflow-checking,
5230 * and and null-terminate the text (the VFS expects
5231 * null-termination).
5232 */
5233 xdr_terminate_string(rcvbuf, len);
5234 return 0;
5235 }
5236
5237 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5238 {
5239 int status;
5240
5241 status = decode_op_hdr(xdr, OP_REMOVE);
5242 if (status)
5243 goto out;
5244 status = decode_change_info(xdr, cinfo);
5245 out:
5246 return status;
5247 }
5248
5249 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5250 struct nfs4_change_info *new_cinfo)
5251 {
5252 int status;
5253
5254 status = decode_op_hdr(xdr, OP_RENAME);
5255 if (status)
5256 goto out;
5257 if ((status = decode_change_info(xdr, old_cinfo)))
5258 goto out;
5259 status = decode_change_info(xdr, new_cinfo);
5260 out:
5261 return status;
5262 }
5263
5264 static int decode_renew(struct xdr_stream *xdr)
5265 {
5266 return decode_op_hdr(xdr, OP_RENEW);
5267 }
5268
5269 static int
5270 decode_restorefh(struct xdr_stream *xdr)
5271 {
5272 return decode_op_hdr(xdr, OP_RESTOREFH);
5273 }
5274
5275 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5276 struct nfs_getaclres *res)
5277 {
5278 unsigned int savep;
5279 uint32_t attrlen,
5280 bitmap[3] = {0};
5281 int status;
5282 unsigned int pg_offset;
5283
5284 res->acl_len = 0;
5285 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5286 goto out;
5287
5288 xdr_enter_page(xdr, xdr->buf->page_len);
5289
5290 /* Calculate the offset of the page data */
5291 pg_offset = xdr->buf->head[0].iov_len;
5292
5293 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5294 goto out;
5295 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5296 goto out;
5297
5298 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5299 return -EIO;
5300 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5301
5302 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5303 * are stored with the acl data to handle the problem of
5304 * variable length bitmaps.*/
5305 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5306 res->acl_len = attrlen;
5307
5308 /* Check for receive buffer overflow */
5309 if (res->acl_len > (xdr->nwords << 2) ||
5310 res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5311 res->acl_flags |= NFS4_ACL_TRUNC;
5312 dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5313 attrlen, xdr->nwords << 2);
5314 }
5315 } else
5316 status = -EOPNOTSUPP;
5317
5318 out:
5319 return status;
5320 }
5321
5322 static int
5323 decode_savefh(struct xdr_stream *xdr)
5324 {
5325 return decode_op_hdr(xdr, OP_SAVEFH);
5326 }
5327
5328 static int decode_setattr(struct xdr_stream *xdr)
5329 {
5330 int status;
5331
5332 status = decode_op_hdr(xdr, OP_SETATTR);
5333 if (status)
5334 return status;
5335 if (decode_bitmap4(xdr, NULL, 0) >= 0)
5336 return 0;
5337 return -EIO;
5338 }
5339
5340 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5341 {
5342 __be32 *p;
5343 uint32_t opnum;
5344 int32_t nfserr;
5345
5346 p = xdr_inline_decode(xdr, 8);
5347 if (unlikely(!p))
5348 return -EIO;
5349 opnum = be32_to_cpup(p++);
5350 if (opnum != OP_SETCLIENTID) {
5351 dprintk("nfs: decode_setclientid: Server returned operation"
5352 " %d\n", opnum);
5353 return -EIO;
5354 }
5355 nfserr = be32_to_cpup(p);
5356 if (nfserr == NFS_OK) {
5357 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5358 if (unlikely(!p))
5359 return -EIO;
5360 p = xdr_decode_hyper(p, &res->clientid);
5361 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5362 } else if (nfserr == NFSERR_CLID_INUSE) {
5363 uint32_t len;
5364
5365 /* skip netid string */
5366 p = xdr_inline_decode(xdr, 4);
5367 if (unlikely(!p))
5368 return -EIO;
5369 len = be32_to_cpup(p);
5370 p = xdr_inline_decode(xdr, len);
5371 if (unlikely(!p))
5372 return -EIO;
5373
5374 /* skip uaddr string */
5375 p = xdr_inline_decode(xdr, 4);
5376 if (unlikely(!p))
5377 return -EIO;
5378 len = be32_to_cpup(p);
5379 p = xdr_inline_decode(xdr, len);
5380 if (unlikely(!p))
5381 return -EIO;
5382 return -NFSERR_CLID_INUSE;
5383 } else
5384 return nfs4_stat_to_errno(nfserr);
5385
5386 return 0;
5387 }
5388
5389 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5390 {
5391 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5392 }
5393
5394 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5395 {
5396 __be32 *p;
5397 int status;
5398
5399 status = decode_op_hdr(xdr, OP_WRITE);
5400 if (status)
5401 return status;
5402
5403 p = xdr_inline_decode(xdr, 8);
5404 if (unlikely(!p))
5405 return -EIO;
5406 res->count = be32_to_cpup(p++);
5407 res->verf->committed = be32_to_cpup(p++);
5408 return decode_write_verifier(xdr, &res->verf->verifier);
5409 }
5410
5411 static int decode_delegreturn(struct xdr_stream *xdr)
5412 {
5413 return decode_op_hdr(xdr, OP_DELEGRETURN);
5414 }
5415
5416 static int decode_secinfo_gss(struct xdr_stream *xdr,
5417 struct nfs4_secinfo4 *flavor)
5418 {
5419 u32 oid_len;
5420 __be32 *p;
5421
5422 p = xdr_inline_decode(xdr, 4);
5423 if (unlikely(!p))
5424 return -EIO;
5425 oid_len = be32_to_cpup(p);
5426 if (oid_len > GSS_OID_MAX_LEN)
5427 return -EINVAL;
5428
5429 p = xdr_inline_decode(xdr, oid_len);
5430 if (unlikely(!p))
5431 return -EIO;
5432 memcpy(flavor->flavor_info.oid.data, p, oid_len);
5433 flavor->flavor_info.oid.len = oid_len;
5434
5435 p = xdr_inline_decode(xdr, 8);
5436 if (unlikely(!p))
5437 return -EIO;
5438 flavor->flavor_info.qop = be32_to_cpup(p++);
5439 flavor->flavor_info.service = be32_to_cpup(p);
5440
5441 return 0;
5442 }
5443
5444 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5445 {
5446 struct nfs4_secinfo4 *sec_flavor;
5447 unsigned int i, num_flavors;
5448 int status;
5449 __be32 *p;
5450
5451 p = xdr_inline_decode(xdr, 4);
5452 if (unlikely(!p))
5453 return -EIO;
5454
5455 res->flavors->num_flavors = 0;
5456 num_flavors = be32_to_cpup(p);
5457
5458 for (i = 0; i < num_flavors; i++) {
5459 sec_flavor = &res->flavors->flavors[i];
5460 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5461 break;
5462
5463 p = xdr_inline_decode(xdr, 4);
5464 if (unlikely(!p))
5465 return -EIO;
5466 sec_flavor->flavor = be32_to_cpup(p);
5467
5468 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5469 status = decode_secinfo_gss(xdr, sec_flavor);
5470 if (status)
5471 goto out;
5472 }
5473 res->flavors->num_flavors++;
5474 }
5475
5476 status = 0;
5477 out:
5478 return status;
5479 }
5480
5481 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5482 {
5483 int status = decode_op_hdr(xdr, OP_SECINFO);
5484 if (status)
5485 return status;
5486 return decode_secinfo_common(xdr, res);
5487 }
5488
5489 #if defined(CONFIG_NFS_V4_1)
5490 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5491 {
5492 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5493 if (status)
5494 return status;
5495 return decode_secinfo_common(xdr, res);
5496 }
5497
5498 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5499 {
5500 __be32 *p;
5501 uint32_t bitmap_words;
5502 unsigned int i;
5503
5504 p = xdr_inline_decode(xdr, 4);
5505 if (!p)
5506 return -EIO;
5507 bitmap_words = be32_to_cpup(p++);
5508 if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5509 return -EIO;
5510 p = xdr_inline_decode(xdr, 4 * bitmap_words);
5511 for (i = 0; i < bitmap_words; i++)
5512 op_map->u.words[i] = be32_to_cpup(p++);
5513
5514 return 0;
5515 }
5516
5517 static int decode_exchange_id(struct xdr_stream *xdr,
5518 struct nfs41_exchange_id_res *res)
5519 {
5520 __be32 *p;
5521 uint32_t dummy;
5522 char *dummy_str;
5523 int status;
5524 uint32_t impl_id_count;
5525
5526 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5527 if (status)
5528 return status;
5529
5530 p = xdr_inline_decode(xdr, 8);
5531 if (unlikely(!p))
5532 return -EIO;
5533 xdr_decode_hyper(p, &res->clientid);
5534 p = xdr_inline_decode(xdr, 12);
5535 if (unlikely(!p))
5536 return -EIO;
5537 res->seqid = be32_to_cpup(p++);
5538 res->flags = be32_to_cpup(p++);
5539
5540 res->state_protect.how = be32_to_cpup(p);
5541 switch (res->state_protect.how) {
5542 case SP4_NONE:
5543 break;
5544 case SP4_MACH_CRED:
5545 status = decode_op_map(xdr, &res->state_protect.enforce);
5546 if (status)
5547 return status;
5548 status = decode_op_map(xdr, &res->state_protect.allow);
5549 if (status)
5550 return status;
5551 break;
5552 default:
5553 WARN_ON_ONCE(1);
5554 return -EIO;
5555 }
5556
5557 /* server_owner4.so_minor_id */
5558 p = xdr_inline_decode(xdr, 8);
5559 if (unlikely(!p))
5560 return -EIO;
5561 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5562
5563 /* server_owner4.so_major_id */
5564 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5565 if (unlikely(status))
5566 return status;
5567 memcpy(res->server_owner->major_id, dummy_str, dummy);
5568 res->server_owner->major_id_sz = dummy;
5569
5570 /* server_scope4 */
5571 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5572 if (unlikely(status))
5573 return status;
5574 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5575 res->server_scope->server_scope_sz = dummy;
5576
5577 /* Implementation Id */
5578 p = xdr_inline_decode(xdr, 4);
5579 if (unlikely(!p))
5580 return -EIO;
5581 impl_id_count = be32_to_cpup(p++);
5582
5583 if (impl_id_count) {
5584 /* nii_domain */
5585 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5586 if (unlikely(status))
5587 return status;
5588 memcpy(res->impl_id->domain, dummy_str, dummy);
5589
5590 /* nii_name */
5591 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5592 if (unlikely(status))
5593 return status;
5594 memcpy(res->impl_id->name, dummy_str, dummy);
5595
5596 /* nii_date */
5597 p = xdr_inline_decode(xdr, 12);
5598 if (unlikely(!p))
5599 return -EIO;
5600 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5601 res->impl_id->date.nseconds = be32_to_cpup(p);
5602
5603 /* if there's more than one entry, ignore the rest */
5604 }
5605 return 0;
5606 }
5607
5608 static int decode_chan_attrs(struct xdr_stream *xdr,
5609 struct nfs4_channel_attrs *attrs)
5610 {
5611 __be32 *p;
5612 u32 nr_attrs, val;
5613
5614 p = xdr_inline_decode(xdr, 28);
5615 if (unlikely(!p))
5616 return -EIO;
5617 val = be32_to_cpup(p++); /* headerpadsz */
5618 if (val)
5619 return -EINVAL; /* no support for header padding yet */
5620 attrs->max_rqst_sz = be32_to_cpup(p++);
5621 attrs->max_resp_sz = be32_to_cpup(p++);
5622 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5623 attrs->max_ops = be32_to_cpup(p++);
5624 attrs->max_reqs = be32_to_cpup(p++);
5625 nr_attrs = be32_to_cpup(p);
5626 if (unlikely(nr_attrs > 1)) {
5627 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5628 "count %u\n", __func__, nr_attrs);
5629 return -EINVAL;
5630 }
5631 if (nr_attrs == 1) {
5632 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5633 if (unlikely(!p))
5634 return -EIO;
5635 }
5636 return 0;
5637 }
5638
5639 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5640 {
5641 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5642 }
5643
5644 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5645 struct nfs41_bind_conn_to_session_res *res)
5646 {
5647 __be32 *p;
5648 int status;
5649
5650 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5651 if (!status)
5652 status = decode_sessionid(xdr, &res->sessionid);
5653 if (unlikely(status))
5654 return status;
5655
5656 /* dir flags, rdma mode bool */
5657 p = xdr_inline_decode(xdr, 8);
5658 if (unlikely(!p))
5659 return -EIO;
5660
5661 res->dir = be32_to_cpup(p++);
5662 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5663 return -EIO;
5664 if (be32_to_cpup(p) == 0)
5665 res->use_conn_in_rdma_mode = false;
5666 else
5667 res->use_conn_in_rdma_mode = true;
5668
5669 return 0;
5670 }
5671
5672 static int decode_create_session(struct xdr_stream *xdr,
5673 struct nfs41_create_session_res *res)
5674 {
5675 __be32 *p;
5676 int status;
5677
5678 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5679 if (!status)
5680 status = decode_sessionid(xdr, &res->sessionid);
5681 if (unlikely(status))
5682 return status;
5683
5684 /* seqid, flags */
5685 p = xdr_inline_decode(xdr, 8);
5686 if (unlikely(!p))
5687 return -EIO;
5688 res->seqid = be32_to_cpup(p++);
5689 res->flags = be32_to_cpup(p);
5690
5691 /* Channel attributes */
5692 status = decode_chan_attrs(xdr, &res->fc_attrs);
5693 if (!status)
5694 status = decode_chan_attrs(xdr, &res->bc_attrs);
5695 return status;
5696 }
5697
5698 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5699 {
5700 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5701 }
5702
5703 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5704 {
5705 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5706 }
5707
5708 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5709 {
5710 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5711 }
5712 #endif /* CONFIG_NFS_V4_1 */
5713
5714 static int decode_sequence(struct xdr_stream *xdr,
5715 struct nfs4_sequence_res *res,
5716 struct rpc_rqst *rqstp)
5717 {
5718 #if defined(CONFIG_NFS_V4_1)
5719 struct nfs4_session *session;
5720 struct nfs4_sessionid id;
5721 u32 dummy;
5722 int status;
5723 __be32 *p;
5724
5725 if (res->sr_slot == NULL)
5726 return 0;
5727 if (!res->sr_slot->table->session)
5728 return 0;
5729
5730 status = decode_op_hdr(xdr, OP_SEQUENCE);
5731 if (!status)
5732 status = decode_sessionid(xdr, &id);
5733 if (unlikely(status))
5734 goto out_err;
5735
5736 /*
5737 * If the server returns different values for sessionID, slotID or
5738 * sequence number, the server is looney tunes.
5739 */
5740 status = -EREMOTEIO;
5741 session = res->sr_slot->table->session;
5742
5743 if (memcmp(id.data, session->sess_id.data,
5744 NFS4_MAX_SESSIONID_LEN)) {
5745 dprintk("%s Invalid session id\n", __func__);
5746 goto out_err;
5747 }
5748
5749 p = xdr_inline_decode(xdr, 20);
5750 if (unlikely(!p))
5751 goto out_overflow;
5752
5753 /* seqid */
5754 dummy = be32_to_cpup(p++);
5755 if (dummy != res->sr_slot->seq_nr) {
5756 dprintk("%s Invalid sequence number\n", __func__);
5757 goto out_err;
5758 }
5759 /* slot id */
5760 dummy = be32_to_cpup(p++);
5761 if (dummy != res->sr_slot->slot_nr) {
5762 dprintk("%s Invalid slot id\n", __func__);
5763 goto out_err;
5764 }
5765 /* highest slot id */
5766 res->sr_highest_slotid = be32_to_cpup(p++);
5767 /* target highest slot id */
5768 res->sr_target_highest_slotid = be32_to_cpup(p++);
5769 /* result flags */
5770 res->sr_status_flags = be32_to_cpup(p);
5771 status = 0;
5772 out_err:
5773 res->sr_status = status;
5774 return status;
5775 out_overflow:
5776 status = -EIO;
5777 goto out_err;
5778 #else /* CONFIG_NFS_V4_1 */
5779 return 0;
5780 #endif /* CONFIG_NFS_V4_1 */
5781 }
5782
5783 #if defined(CONFIG_NFS_V4_1)
5784 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5785 {
5786 stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5787 return decode_stateid(xdr, stateid);
5788 }
5789
5790 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5791 struct nfs4_getdeviceinfo_res *res)
5792 {
5793 struct pnfs_device *pdev = res->pdev;
5794 __be32 *p;
5795 uint32_t len, type;
5796 int status;
5797
5798 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5799 if (status) {
5800 if (status == -ETOOSMALL) {
5801 p = xdr_inline_decode(xdr, 4);
5802 if (unlikely(!p))
5803 return -EIO;
5804 pdev->mincount = be32_to_cpup(p);
5805 dprintk("%s: Min count too small. mincnt = %u\n",
5806 __func__, pdev->mincount);
5807 }
5808 return status;
5809 }
5810
5811 p = xdr_inline_decode(xdr, 8);
5812 if (unlikely(!p))
5813 return -EIO;
5814 type = be32_to_cpup(p++);
5815 if (type != pdev->layout_type) {
5816 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5817 __func__, pdev->layout_type, type);
5818 return -EINVAL;
5819 }
5820 /*
5821 * Get the length of the opaque device_addr4. xdr_read_pages places
5822 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5823 * and places the remaining xdr data in xdr_buf->tail
5824 */
5825 pdev->mincount = be32_to_cpup(p);
5826 if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5827 return -EIO;
5828
5829 /* Parse notification bitmap, verifying that it is zero. */
5830 p = xdr_inline_decode(xdr, 4);
5831 if (unlikely(!p))
5832 return -EIO;
5833 len = be32_to_cpup(p);
5834 if (len) {
5835 uint32_t i;
5836
5837 p = xdr_inline_decode(xdr, 4 * len);
5838 if (unlikely(!p))
5839 return -EIO;
5840
5841 res->notification = be32_to_cpup(p++);
5842 for (i = 1; i < len; i++) {
5843 if (be32_to_cpup(p++)) {
5844 dprintk("%s: unsupported notification\n",
5845 __func__);
5846 return -EIO;
5847 }
5848 }
5849 }
5850 return 0;
5851 }
5852
5853 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5854 struct nfs4_layoutget_res *res)
5855 {
5856 __be32 *p;
5857 int status;
5858 u32 layout_count;
5859 u32 recvd;
5860
5861 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5862 if (status)
5863 goto out;
5864 p = xdr_inline_decode(xdr, 4);
5865 if (unlikely(!p))
5866 goto out_overflow;
5867 res->return_on_close = be32_to_cpup(p);
5868 decode_layout_stateid(xdr, &res->stateid);
5869 p = xdr_inline_decode(xdr, 4);
5870 if (unlikely(!p))
5871 goto out_overflow;
5872 layout_count = be32_to_cpup(p);
5873 if (!layout_count) {
5874 dprintk("%s: server responded with empty layout array\n",
5875 __func__);
5876 status = -EINVAL;
5877 goto out;
5878 }
5879
5880 p = xdr_inline_decode(xdr, 28);
5881 if (unlikely(!p))
5882 goto out_overflow;
5883 p = xdr_decode_hyper(p, &res->range.offset);
5884 p = xdr_decode_hyper(p, &res->range.length);
5885 res->range.iomode = be32_to_cpup(p++);
5886 res->type = be32_to_cpup(p++);
5887 res->layoutp->len = be32_to_cpup(p);
5888
5889 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5890 __func__,
5891 (unsigned long)res->range.offset,
5892 (unsigned long)res->range.length,
5893 res->range.iomode,
5894 res->type,
5895 res->layoutp->len);
5896
5897 recvd = xdr_read_pages(xdr, res->layoutp->len);
5898 if (res->layoutp->len > recvd) {
5899 dprintk("NFS: server cheating in layoutget reply: "
5900 "layout len %u > recvd %u\n",
5901 res->layoutp->len, recvd);
5902 status = -EINVAL;
5903 goto out;
5904 }
5905
5906 if (layout_count > 1) {
5907 /* We only handle a length one array at the moment. Any
5908 * further entries are just ignored. Note that this means
5909 * the client may see a response that is less than the
5910 * minimum it requested.
5911 */
5912 dprintk("%s: server responded with %d layouts, dropping tail\n",
5913 __func__, layout_count);
5914 }
5915
5916 out:
5917 res->status = status;
5918 return status;
5919 out_overflow:
5920 status = -EIO;
5921 goto out;
5922 }
5923
5924 static int decode_layoutreturn(struct xdr_stream *xdr,
5925 struct nfs4_layoutreturn_res *res)
5926 {
5927 __be32 *p;
5928 int status;
5929
5930 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5931 if (status)
5932 return status;
5933 p = xdr_inline_decode(xdr, 4);
5934 if (unlikely(!p))
5935 return -EIO;
5936 res->lrs_present = be32_to_cpup(p);
5937 if (res->lrs_present)
5938 status = decode_layout_stateid(xdr, &res->stateid);
5939 else
5940 nfs4_stateid_copy(&res->stateid, &invalid_stateid);
5941 return status;
5942 }
5943
5944 static int decode_layoutcommit(struct xdr_stream *xdr,
5945 struct rpc_rqst *req,
5946 struct nfs4_layoutcommit_res *res)
5947 {
5948 __be32 *p;
5949 __u32 sizechanged;
5950 int status;
5951
5952 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5953 res->status = status;
5954 if (status)
5955 return status;
5956
5957 p = xdr_inline_decode(xdr, 4);
5958 if (unlikely(!p))
5959 return -EIO;
5960 sizechanged = be32_to_cpup(p);
5961
5962 if (sizechanged) {
5963 /* throw away new size */
5964 p = xdr_inline_decode(xdr, 8);
5965 if (unlikely(!p))
5966 return -EIO;
5967 }
5968 return 0;
5969 }
5970
5971 static int decode_test_stateid(struct xdr_stream *xdr,
5972 struct nfs41_test_stateid_res *res)
5973 {
5974 __be32 *p;
5975 int status;
5976 int num_res;
5977
5978 status = decode_op_hdr(xdr, OP_TEST_STATEID);
5979 if (status)
5980 return status;
5981
5982 p = xdr_inline_decode(xdr, 4);
5983 if (unlikely(!p))
5984 return -EIO;
5985 num_res = be32_to_cpup(p++);
5986 if (num_res != 1)
5987 return -EIO;
5988
5989 p = xdr_inline_decode(xdr, 4);
5990 if (unlikely(!p))
5991 return -EIO;
5992 res->status = be32_to_cpup(p++);
5993
5994 return status;
5995 }
5996
5997 static int decode_free_stateid(struct xdr_stream *xdr,
5998 struct nfs41_free_stateid_res *res)
5999 {
6000 res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6001 return res->status;
6002 }
6003 #else
6004 static inline
6005 int decode_layoutreturn(struct xdr_stream *xdr,
6006 struct nfs4_layoutreturn_res *res)
6007 {
6008 return 0;
6009 }
6010
6011 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6012 struct nfs4_layoutget_res *res)
6013 {
6014 return 0;
6015 }
6016
6017 #endif /* CONFIG_NFS_V4_1 */
6018
6019 /*
6020 * END OF "GENERIC" DECODE ROUTINES.
6021 */
6022
6023 /*
6024 * Decode OPEN_DOWNGRADE response
6025 */
6026 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6027 struct xdr_stream *xdr,
6028 void *data)
6029 {
6030 struct nfs_closeres *res = data;
6031 struct compound_hdr hdr;
6032 int status;
6033
6034 status = decode_compound_hdr(xdr, &hdr);
6035 if (status)
6036 goto out;
6037 status = decode_sequence(xdr, &res->seq_res, rqstp);
6038 if (status)
6039 goto out;
6040 status = decode_putfh(xdr);
6041 if (status)
6042 goto out;
6043 if (res->lr_res) {
6044 status = decode_layoutreturn(xdr, res->lr_res);
6045 res->lr_ret = status;
6046 if (status)
6047 goto out;
6048 }
6049 status = decode_open_downgrade(xdr, res);
6050 out:
6051 return status;
6052 }
6053
6054 /*
6055 * Decode ACCESS response
6056 */
6057 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6058 void *data)
6059 {
6060 struct nfs4_accessres *res = data;
6061 struct compound_hdr hdr;
6062 int status;
6063
6064 status = decode_compound_hdr(xdr, &hdr);
6065 if (status)
6066 goto out;
6067 status = decode_sequence(xdr, &res->seq_res, rqstp);
6068 if (status)
6069 goto out;
6070 status = decode_putfh(xdr);
6071 if (status != 0)
6072 goto out;
6073 status = decode_access(xdr, &res->supported, &res->access);
6074 if (status != 0)
6075 goto out;
6076 if (res->fattr)
6077 decode_getfattr(xdr, res->fattr, res->server);
6078 out:
6079 return status;
6080 }
6081
6082 /*
6083 * Decode LOOKUP response
6084 */
6085 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6086 void *data)
6087 {
6088 struct nfs4_lookup_res *res = data;
6089 struct compound_hdr hdr;
6090 int status;
6091
6092 status = decode_compound_hdr(xdr, &hdr);
6093 if (status)
6094 goto out;
6095 status = decode_sequence(xdr, &res->seq_res, rqstp);
6096 if (status)
6097 goto out;
6098 status = decode_putfh(xdr);
6099 if (status)
6100 goto out;
6101 status = decode_lookup(xdr);
6102 if (status)
6103 goto out;
6104 status = decode_getfh(xdr, res->fh);
6105 if (status)
6106 goto out;
6107 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6108 out:
6109 return status;
6110 }
6111
6112 /*
6113 * Decode LOOKUPP response
6114 */
6115 static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6116 void *data)
6117 {
6118 struct nfs4_lookupp_res *res = data;
6119 struct compound_hdr hdr;
6120 int status;
6121
6122 status = decode_compound_hdr(xdr, &hdr);
6123 if (status)
6124 goto out;
6125 status = decode_sequence(xdr, &res->seq_res, rqstp);
6126 if (status)
6127 goto out;
6128 status = decode_putfh(xdr);
6129 if (status)
6130 goto out;
6131 status = decode_lookupp(xdr);
6132 if (status)
6133 goto out;
6134 status = decode_getfh(xdr, res->fh);
6135 if (status)
6136 goto out;
6137 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6138 out:
6139 return status;
6140 }
6141
6142 /*
6143 * Decode LOOKUP_ROOT response
6144 */
6145 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6146 struct xdr_stream *xdr,
6147 void *data)
6148 {
6149 struct nfs4_lookup_res *res = data;
6150 struct compound_hdr hdr;
6151 int status;
6152
6153 status = decode_compound_hdr(xdr, &hdr);
6154 if (status)
6155 goto out;
6156 status = decode_sequence(xdr, &res->seq_res, rqstp);
6157 if (status)
6158 goto out;
6159 status = decode_putrootfh(xdr);
6160 if (status)
6161 goto out;
6162 status = decode_getfh(xdr, res->fh);
6163 if (status == 0)
6164 status = decode_getfattr_label(xdr, res->fattr,
6165 res->label, res->server);
6166 out:
6167 return status;
6168 }
6169
6170 /*
6171 * Decode REMOVE response
6172 */
6173 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6174 void *data)
6175 {
6176 struct nfs_removeres *res = data;
6177 struct compound_hdr hdr;
6178 int status;
6179
6180 status = decode_compound_hdr(xdr, &hdr);
6181 if (status)
6182 goto out;
6183 status = decode_sequence(xdr, &res->seq_res, rqstp);
6184 if (status)
6185 goto out;
6186 status = decode_putfh(xdr);
6187 if (status)
6188 goto out;
6189 status = decode_remove(xdr, &res->cinfo);
6190 out:
6191 return status;
6192 }
6193
6194 /*
6195 * Decode RENAME response
6196 */
6197 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6198 void *data)
6199 {
6200 struct nfs_renameres *res = data;
6201 struct compound_hdr hdr;
6202 int status;
6203
6204 status = decode_compound_hdr(xdr, &hdr);
6205 if (status)
6206 goto out;
6207 status = decode_sequence(xdr, &res->seq_res, rqstp);
6208 if (status)
6209 goto out;
6210 status = decode_putfh(xdr);
6211 if (status)
6212 goto out;
6213 status = decode_savefh(xdr);
6214 if (status)
6215 goto out;
6216 status = decode_putfh(xdr);
6217 if (status)
6218 goto out;
6219 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6220 out:
6221 return status;
6222 }
6223
6224 /*
6225 * Decode LINK response
6226 */
6227 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6228 void *data)
6229 {
6230 struct nfs4_link_res *res = data;
6231 struct compound_hdr hdr;
6232 int status;
6233
6234 status = decode_compound_hdr(xdr, &hdr);
6235 if (status)
6236 goto out;
6237 status = decode_sequence(xdr, &res->seq_res, rqstp);
6238 if (status)
6239 goto out;
6240 status = decode_putfh(xdr);
6241 if (status)
6242 goto out;
6243 status = decode_savefh(xdr);
6244 if (status)
6245 goto out;
6246 status = decode_putfh(xdr);
6247 if (status)
6248 goto out;
6249 status = decode_link(xdr, &res->cinfo);
6250 if (status)
6251 goto out;
6252 /*
6253 * Note order: OP_LINK leaves the directory as the current
6254 * filehandle.
6255 */
6256 status = decode_restorefh(xdr);
6257 if (status)
6258 goto out;
6259 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6260 out:
6261 return status;
6262 }
6263
6264 /*
6265 * Decode CREATE response
6266 */
6267 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6268 void *data)
6269 {
6270 struct nfs4_create_res *res = data;
6271 struct compound_hdr hdr;
6272 int status;
6273
6274 status = decode_compound_hdr(xdr, &hdr);
6275 if (status)
6276 goto out;
6277 status = decode_sequence(xdr, &res->seq_res, rqstp);
6278 if (status)
6279 goto out;
6280 status = decode_putfh(xdr);
6281 if (status)
6282 goto out;
6283 status = decode_create(xdr, &res->dir_cinfo);
6284 if (status)
6285 goto out;
6286 status = decode_getfh(xdr, res->fh);
6287 if (status)
6288 goto out;
6289 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6290 out:
6291 return status;
6292 }
6293
6294 /*
6295 * Decode SYMLINK response
6296 */
6297 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6298 void *res)
6299 {
6300 return nfs4_xdr_dec_create(rqstp, xdr, res);
6301 }
6302
6303 /*
6304 * Decode GETATTR response
6305 */
6306 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6307 void *data)
6308 {
6309 struct nfs4_getattr_res *res = data;
6310 struct compound_hdr hdr;
6311 int status;
6312
6313 status = decode_compound_hdr(xdr, &hdr);
6314 if (status)
6315 goto out;
6316 status = decode_sequence(xdr, &res->seq_res, rqstp);
6317 if (status)
6318 goto out;
6319 status = decode_putfh(xdr);
6320 if (status)
6321 goto out;
6322 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6323 out:
6324 return status;
6325 }
6326
6327 /*
6328 * Encode an SETACL request
6329 */
6330 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6331 const void *data)
6332 {
6333 const struct nfs_setaclargs *args = data;
6334 struct compound_hdr hdr = {
6335 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6336 };
6337
6338 encode_compound_hdr(xdr, req, &hdr);
6339 encode_sequence(xdr, &args->seq_args, &hdr);
6340 encode_putfh(xdr, args->fh, &hdr);
6341 encode_setacl(xdr, args, &hdr);
6342 encode_nops(&hdr);
6343 }
6344
6345 /*
6346 * Decode SETACL response
6347 */
6348 static int
6349 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6350 void *data)
6351 {
6352 struct nfs_setaclres *res = data;
6353 struct compound_hdr hdr;
6354 int status;
6355
6356 status = decode_compound_hdr(xdr, &hdr);
6357 if (status)
6358 goto out;
6359 status = decode_sequence(xdr, &res->seq_res, rqstp);
6360 if (status)
6361 goto out;
6362 status = decode_putfh(xdr);
6363 if (status)
6364 goto out;
6365 status = decode_setattr(xdr);
6366 out:
6367 return status;
6368 }
6369
6370 /*
6371 * Decode GETACL response
6372 */
6373 static int
6374 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6375 void *data)
6376 {
6377 struct nfs_getaclres *res = data;
6378 struct compound_hdr hdr;
6379 int status;
6380
6381 if (res->acl_scratch != NULL) {
6382 void *p = page_address(res->acl_scratch);
6383 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6384 }
6385 status = decode_compound_hdr(xdr, &hdr);
6386 if (status)
6387 goto out;
6388 status = decode_sequence(xdr, &res->seq_res, rqstp);
6389 if (status)
6390 goto out;
6391 status = decode_putfh(xdr);
6392 if (status)
6393 goto out;
6394 status = decode_getacl(xdr, rqstp, res);
6395
6396 out:
6397 return status;
6398 }
6399
6400 /*
6401 * Decode CLOSE response
6402 */
6403 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6404 void *data)
6405 {
6406 struct nfs_closeres *res = data;
6407 struct compound_hdr hdr;
6408 int status;
6409
6410 status = decode_compound_hdr(xdr, &hdr);
6411 if (status)
6412 goto out;
6413 status = decode_sequence(xdr, &res->seq_res, rqstp);
6414 if (status)
6415 goto out;
6416 status = decode_putfh(xdr);
6417 if (status)
6418 goto out;
6419 if (res->lr_res) {
6420 status = decode_layoutreturn(xdr, res->lr_res);
6421 res->lr_ret = status;
6422 if (status)
6423 goto out;
6424 }
6425 if (res->fattr != NULL) {
6426 status = decode_getfattr(xdr, res->fattr, res->server);
6427 if (status != 0)
6428 goto out;
6429 }
6430 status = decode_close(xdr, res);
6431 out:
6432 return status;
6433 }
6434
6435 /*
6436 * Decode OPEN response
6437 */
6438 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6439 void *data)
6440 {
6441 struct nfs_openres *res = data;
6442 struct compound_hdr hdr;
6443 int status;
6444
6445 status = decode_compound_hdr(xdr, &hdr);
6446 if (status)
6447 goto out;
6448 status = decode_sequence(xdr, &res->seq_res, rqstp);
6449 if (status)
6450 goto out;
6451 status = decode_putfh(xdr);
6452 if (status)
6453 goto out;
6454 status = decode_open(xdr, res);
6455 if (status)
6456 goto out;
6457 status = decode_getfh(xdr, &res->fh);
6458 if (status)
6459 goto out;
6460 if (res->access_request)
6461 decode_access(xdr, &res->access_supported, &res->access_result);
6462 decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6463 if (res->lg_res)
6464 decode_layoutget(xdr, rqstp, res->lg_res);
6465 out:
6466 return status;
6467 }
6468
6469 /*
6470 * Decode OPEN_CONFIRM response
6471 */
6472 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6473 struct xdr_stream *xdr,
6474 void *data)
6475 {
6476 struct nfs_open_confirmres *res = data;
6477 struct compound_hdr hdr;
6478 int status;
6479
6480 status = decode_compound_hdr(xdr, &hdr);
6481 if (status)
6482 goto out;
6483 status = decode_putfh(xdr);
6484 if (status)
6485 goto out;
6486 status = decode_open_confirm(xdr, res);
6487 out:
6488 return status;
6489 }
6490
6491 /*
6492 * Decode OPEN response
6493 */
6494 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6495 struct xdr_stream *xdr,
6496 void *data)
6497 {
6498 struct nfs_openres *res = data;
6499 struct compound_hdr hdr;
6500 int status;
6501
6502 status = decode_compound_hdr(xdr, &hdr);
6503 if (status)
6504 goto out;
6505 status = decode_sequence(xdr, &res->seq_res, rqstp);
6506 if (status)
6507 goto out;
6508 status = decode_putfh(xdr);
6509 if (status)
6510 goto out;
6511 status = decode_open(xdr, res);
6512 if (status)
6513 goto out;
6514 if (res->access_request)
6515 decode_access(xdr, &res->access_supported, &res->access_result);
6516 decode_getfattr(xdr, res->f_attr, res->server);
6517 if (res->lg_res)
6518 decode_layoutget(xdr, rqstp, res->lg_res);
6519 out:
6520 return status;
6521 }
6522
6523 /*
6524 * Decode SETATTR response
6525 */
6526 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6527 struct xdr_stream *xdr,
6528 void *data)
6529 {
6530 struct nfs_setattrres *res = data;
6531 struct compound_hdr hdr;
6532 int status;
6533
6534 status = decode_compound_hdr(xdr, &hdr);
6535 if (status)
6536 goto out;
6537 status = decode_sequence(xdr, &res->seq_res, rqstp);
6538 if (status)
6539 goto out;
6540 status = decode_putfh(xdr);
6541 if (status)
6542 goto out;
6543 status = decode_setattr(xdr);
6544 if (status)
6545 goto out;
6546 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6547 out:
6548 return status;
6549 }
6550
6551 /*
6552 * Decode LOCK response
6553 */
6554 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6555 void *data)
6556 {
6557 struct nfs_lock_res *res = data;
6558 struct compound_hdr hdr;
6559 int status;
6560
6561 status = decode_compound_hdr(xdr, &hdr);
6562 if (status)
6563 goto out;
6564 status = decode_sequence(xdr, &res->seq_res, rqstp);
6565 if (status)
6566 goto out;
6567 status = decode_putfh(xdr);
6568 if (status)
6569 goto out;
6570 status = decode_lock(xdr, res);
6571 out:
6572 return status;
6573 }
6574
6575 /*
6576 * Decode LOCKT response
6577 */
6578 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6579 void *data)
6580 {
6581 struct nfs_lockt_res *res = data;
6582 struct compound_hdr hdr;
6583 int status;
6584
6585 status = decode_compound_hdr(xdr, &hdr);
6586 if (status)
6587 goto out;
6588 status = decode_sequence(xdr, &res->seq_res, rqstp);
6589 if (status)
6590 goto out;
6591 status = decode_putfh(xdr);
6592 if (status)
6593 goto out;
6594 status = decode_lockt(xdr, res);
6595 out:
6596 return status;
6597 }
6598
6599 /*
6600 * Decode LOCKU response
6601 */
6602 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6603 void *data)
6604 {
6605 struct nfs_locku_res *res = data;
6606 struct compound_hdr hdr;
6607 int status;
6608
6609 status = decode_compound_hdr(xdr, &hdr);
6610 if (status)
6611 goto out;
6612 status = decode_sequence(xdr, &res->seq_res, rqstp);
6613 if (status)
6614 goto out;
6615 status = decode_putfh(xdr);
6616 if (status)
6617 goto out;
6618 status = decode_locku(xdr, res);
6619 out:
6620 return status;
6621 }
6622
6623 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6624 struct xdr_stream *xdr, void *dummy)
6625 {
6626 struct compound_hdr hdr;
6627 int status;
6628
6629 status = decode_compound_hdr(xdr, &hdr);
6630 if (!status)
6631 status = decode_release_lockowner(xdr);
6632 return status;
6633 }
6634
6635 /*
6636 * Decode READLINK response
6637 */
6638 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6639 struct xdr_stream *xdr,
6640 void *data)
6641 {
6642 struct nfs4_readlink_res *res = data;
6643 struct compound_hdr hdr;
6644 int status;
6645
6646 status = decode_compound_hdr(xdr, &hdr);
6647 if (status)
6648 goto out;
6649 status = decode_sequence(xdr, &res->seq_res, rqstp);
6650 if (status)
6651 goto out;
6652 status = decode_putfh(xdr);
6653 if (status)
6654 goto out;
6655 status = decode_readlink(xdr, rqstp);
6656 out:
6657 return status;
6658 }
6659
6660 /*
6661 * Decode READDIR response
6662 */
6663 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6664 void *data)
6665 {
6666 struct nfs4_readdir_res *res = data;
6667 struct compound_hdr hdr;
6668 int status;
6669
6670 status = decode_compound_hdr(xdr, &hdr);
6671 if (status)
6672 goto out;
6673 status = decode_sequence(xdr, &res->seq_res, rqstp);
6674 if (status)
6675 goto out;
6676 status = decode_putfh(xdr);
6677 if (status)
6678 goto out;
6679 status = decode_readdir(xdr, rqstp, res);
6680 out:
6681 return status;
6682 }
6683
6684 /*
6685 * Decode Read response
6686 */
6687 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6688 void *data)
6689 {
6690 struct nfs_pgio_res *res = data;
6691 struct compound_hdr hdr;
6692 int status;
6693
6694 status = decode_compound_hdr(xdr, &hdr);
6695 res->op_status = hdr.status;
6696 if (status)
6697 goto out;
6698 status = decode_sequence(xdr, &res->seq_res, rqstp);
6699 if (status)
6700 goto out;
6701 status = decode_putfh(xdr);
6702 if (status)
6703 goto out;
6704 status = decode_read(xdr, rqstp, res);
6705 if (!status)
6706 status = res->count;
6707 out:
6708 return status;
6709 }
6710
6711 /*
6712 * Decode WRITE response
6713 */
6714 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6715 void *data)
6716 {
6717 struct nfs_pgio_res *res = data;
6718 struct compound_hdr hdr;
6719 int status;
6720
6721 status = decode_compound_hdr(xdr, &hdr);
6722 res->op_status = hdr.status;
6723 if (status)
6724 goto out;
6725 status = decode_sequence(xdr, &res->seq_res, rqstp);
6726 if (status)
6727 goto out;
6728 status = decode_putfh(xdr);
6729 if (status)
6730 goto out;
6731 status = decode_write(xdr, res);
6732 if (status)
6733 goto out;
6734 if (res->fattr)
6735 decode_getfattr(xdr, res->fattr, res->server);
6736 if (!status)
6737 status = res->count;
6738 out:
6739 return status;
6740 }
6741
6742 /*
6743 * Decode COMMIT response
6744 */
6745 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6746 void *data)
6747 {
6748 struct nfs_commitres *res = data;
6749 struct compound_hdr hdr;
6750 int status;
6751
6752 status = decode_compound_hdr(xdr, &hdr);
6753 res->op_status = hdr.status;
6754 if (status)
6755 goto out;
6756 status = decode_sequence(xdr, &res->seq_res, rqstp);
6757 if (status)
6758 goto out;
6759 status = decode_putfh(xdr);
6760 if (status)
6761 goto out;
6762 status = decode_commit(xdr, res);
6763 out:
6764 return status;
6765 }
6766
6767 /*
6768 * Decode FSINFO response
6769 */
6770 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6771 void *data)
6772 {
6773 struct nfs4_fsinfo_res *res = data;
6774 struct compound_hdr hdr;
6775 int status;
6776
6777 status = decode_compound_hdr(xdr, &hdr);
6778 if (!status)
6779 status = decode_sequence(xdr, &res->seq_res, req);
6780 if (!status)
6781 status = decode_putfh(xdr);
6782 if (!status)
6783 status = decode_fsinfo(xdr, res->fsinfo);
6784 return status;
6785 }
6786
6787 /*
6788 * Decode PATHCONF response
6789 */
6790 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6791 void *data)
6792 {
6793 struct nfs4_pathconf_res *res = data;
6794 struct compound_hdr hdr;
6795 int status;
6796
6797 status = decode_compound_hdr(xdr, &hdr);
6798 if (!status)
6799 status = decode_sequence(xdr, &res->seq_res, req);
6800 if (!status)
6801 status = decode_putfh(xdr);
6802 if (!status)
6803 status = decode_pathconf(xdr, res->pathconf);
6804 return status;
6805 }
6806
6807 /*
6808 * Decode STATFS response
6809 */
6810 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6811 void *data)
6812 {
6813 struct nfs4_statfs_res *res = data;
6814 struct compound_hdr hdr;
6815 int status;
6816
6817 status = decode_compound_hdr(xdr, &hdr);
6818 if (!status)
6819 status = decode_sequence(xdr, &res->seq_res, req);
6820 if (!status)
6821 status = decode_putfh(xdr);
6822 if (!status)
6823 status = decode_statfs(xdr, res->fsstat);
6824 return status;
6825 }
6826
6827 /*
6828 * Decode GETATTR_BITMAP response
6829 */
6830 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6831 struct xdr_stream *xdr,
6832 void *data)
6833 {
6834 struct nfs4_server_caps_res *res = data;
6835 struct compound_hdr hdr;
6836 int status;
6837
6838 status = decode_compound_hdr(xdr, &hdr);
6839 if (status)
6840 goto out;
6841 status = decode_sequence(xdr, &res->seq_res, req);
6842 if (status)
6843 goto out;
6844 status = decode_putfh(xdr);
6845 if (status)
6846 goto out;
6847 status = decode_server_caps(xdr, res);
6848 out:
6849 return status;
6850 }
6851
6852 /*
6853 * Decode RENEW response
6854 */
6855 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6856 void *__unused)
6857 {
6858 struct compound_hdr hdr;
6859 int status;
6860
6861 status = decode_compound_hdr(xdr, &hdr);
6862 if (!status)
6863 status = decode_renew(xdr);
6864 return status;
6865 }
6866
6867 /*
6868 * Decode SETCLIENTID response
6869 */
6870 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6871 struct xdr_stream *xdr,
6872 void *data)
6873 {
6874 struct nfs4_setclientid_res *res = data;
6875 struct compound_hdr hdr;
6876 int status;
6877
6878 status = decode_compound_hdr(xdr, &hdr);
6879 if (!status)
6880 status = decode_setclientid(xdr, res);
6881 return status;
6882 }
6883
6884 /*
6885 * Decode SETCLIENTID_CONFIRM response
6886 */
6887 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6888 struct xdr_stream *xdr,
6889 void *data)
6890 {
6891 struct compound_hdr hdr;
6892 int status;
6893
6894 status = decode_compound_hdr(xdr, &hdr);
6895 if (!status)
6896 status = decode_setclientid_confirm(xdr);
6897 return status;
6898 }
6899
6900 /*
6901 * Decode DELEGRETURN response
6902 */
6903 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6904 struct xdr_stream *xdr,
6905 void *data)
6906 {
6907 struct nfs4_delegreturnres *res = data;
6908 struct compound_hdr hdr;
6909 int status;
6910
6911 status = decode_compound_hdr(xdr, &hdr);
6912 if (status)
6913 goto out;
6914 status = decode_sequence(xdr, &res->seq_res, rqstp);
6915 if (status)
6916 goto out;
6917 status = decode_putfh(xdr);
6918 if (status != 0)
6919 goto out;
6920 if (res->lr_res) {
6921 status = decode_layoutreturn(xdr, res->lr_res);
6922 res->lr_ret = status;
6923 if (status)
6924 goto out;
6925 }
6926 if (res->fattr) {
6927 status = decode_getfattr(xdr, res->fattr, res->server);
6928 if (status != 0)
6929 goto out;
6930 }
6931 status = decode_delegreturn(xdr);
6932 out:
6933 return status;
6934 }
6935
6936 /*
6937 * Decode FS_LOCATIONS response
6938 */
6939 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6940 struct xdr_stream *xdr,
6941 void *data)
6942 {
6943 struct nfs4_fs_locations_res *res = data;
6944 struct compound_hdr hdr;
6945 int status;
6946
6947 status = decode_compound_hdr(xdr, &hdr);
6948 if (status)
6949 goto out;
6950 status = decode_sequence(xdr, &res->seq_res, req);
6951 if (status)
6952 goto out;
6953 status = decode_putfh(xdr);
6954 if (status)
6955 goto out;
6956 if (res->migration) {
6957 xdr_enter_page(xdr, PAGE_SIZE);
6958 status = decode_getfattr_generic(xdr,
6959 &res->fs_locations->fattr,
6960 NULL, res->fs_locations,
6961 NULL, res->fs_locations->server);
6962 if (status)
6963 goto out;
6964 if (res->renew)
6965 status = decode_renew(xdr);
6966 } else {
6967 status = decode_lookup(xdr);
6968 if (status)
6969 goto out;
6970 xdr_enter_page(xdr, PAGE_SIZE);
6971 status = decode_getfattr_generic(xdr,
6972 &res->fs_locations->fattr,
6973 NULL, res->fs_locations,
6974 NULL, res->fs_locations->server);
6975 }
6976 out:
6977 return status;
6978 }
6979
6980 /*
6981 * Decode SECINFO response
6982 */
6983 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6984 struct xdr_stream *xdr,
6985 void *data)
6986 {
6987 struct nfs4_secinfo_res *res = data;
6988 struct compound_hdr hdr;
6989 int status;
6990
6991 status = decode_compound_hdr(xdr, &hdr);
6992 if (status)
6993 goto out;
6994 status = decode_sequence(xdr, &res->seq_res, rqstp);
6995 if (status)
6996 goto out;
6997 status = decode_putfh(xdr);
6998 if (status)
6999 goto out;
7000 status = decode_secinfo(xdr, res);
7001 out:
7002 return status;
7003 }
7004
7005 /*
7006 * Decode FSID_PRESENT response
7007 */
7008 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7009 struct xdr_stream *xdr,
7010 void *data)
7011 {
7012 struct nfs4_fsid_present_res *res = data;
7013 struct compound_hdr hdr;
7014 int status;
7015
7016 status = decode_compound_hdr(xdr, &hdr);
7017 if (status)
7018 goto out;
7019 status = decode_sequence(xdr, &res->seq_res, rqstp);
7020 if (status)
7021 goto out;
7022 status = decode_putfh(xdr);
7023 if (status)
7024 goto out;
7025 status = decode_getfh(xdr, res->fh);
7026 if (status)
7027 goto out;
7028 if (res->renew)
7029 status = decode_renew(xdr);
7030 out:
7031 return status;
7032 }
7033
7034 #if defined(CONFIG_NFS_V4_1)
7035 /*
7036 * Decode BIND_CONN_TO_SESSION response
7037 */
7038 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7039 struct xdr_stream *xdr,
7040 void *res)
7041 {
7042 struct compound_hdr hdr;
7043 int status;
7044
7045 status = decode_compound_hdr(xdr, &hdr);
7046 if (!status)
7047 status = decode_bind_conn_to_session(xdr, res);
7048 return status;
7049 }
7050
7051 /*
7052 * Decode EXCHANGE_ID response
7053 */
7054 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7055 struct xdr_stream *xdr,
7056 void *res)
7057 {
7058 struct compound_hdr hdr;
7059 int status;
7060
7061 status = decode_compound_hdr(xdr, &hdr);
7062 if (!status)
7063 status = decode_exchange_id(xdr, res);
7064 return status;
7065 }
7066
7067 /*
7068 * Decode CREATE_SESSION response
7069 */
7070 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7071 struct xdr_stream *xdr,
7072 void *res)
7073 {
7074 struct compound_hdr hdr;
7075 int status;
7076
7077 status = decode_compound_hdr(xdr, &hdr);
7078 if (!status)
7079 status = decode_create_session(xdr, res);
7080 return status;
7081 }
7082
7083 /*
7084 * Decode DESTROY_SESSION response
7085 */
7086 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7087 struct xdr_stream *xdr,
7088 void *res)
7089 {
7090 struct compound_hdr hdr;
7091 int status;
7092
7093 status = decode_compound_hdr(xdr, &hdr);
7094 if (!status)
7095 status = decode_destroy_session(xdr, res);
7096 return status;
7097 }
7098
7099 /*
7100 * Decode DESTROY_CLIENTID response
7101 */
7102 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7103 struct xdr_stream *xdr,
7104 void *res)
7105 {
7106 struct compound_hdr hdr;
7107 int status;
7108
7109 status = decode_compound_hdr(xdr, &hdr);
7110 if (!status)
7111 status = decode_destroy_clientid(xdr, res);
7112 return status;
7113 }
7114
7115 /*
7116 * Decode SEQUENCE response
7117 */
7118 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7119 struct xdr_stream *xdr,
7120 void *res)
7121 {
7122 struct compound_hdr hdr;
7123 int status;
7124
7125 status = decode_compound_hdr(xdr, &hdr);
7126 if (!status)
7127 status = decode_sequence(xdr, res, rqstp);
7128 return status;
7129 }
7130
7131 #endif
7132
7133 /*
7134 * Decode GET_LEASE_TIME response
7135 */
7136 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7137 struct xdr_stream *xdr,
7138 void *data)
7139 {
7140 struct nfs4_get_lease_time_res *res = data;
7141 struct compound_hdr hdr;
7142 int status;
7143
7144 status = decode_compound_hdr(xdr, &hdr);
7145 if (!status)
7146 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7147 if (!status)
7148 status = decode_putrootfh(xdr);
7149 if (!status)
7150 status = decode_fsinfo(xdr, res->lr_fsinfo);
7151 return status;
7152 }
7153
7154 #ifdef CONFIG_NFS_V4_1
7155
7156 /*
7157 * Decode RECLAIM_COMPLETE response
7158 */
7159 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7160 struct xdr_stream *xdr,
7161 void *data)
7162 {
7163 struct nfs41_reclaim_complete_res *res = data;
7164 struct compound_hdr hdr;
7165 int status;
7166
7167 status = decode_compound_hdr(xdr, &hdr);
7168 if (!status)
7169 status = decode_sequence(xdr, &res->seq_res, rqstp);
7170 if (!status)
7171 status = decode_reclaim_complete(xdr, NULL);
7172 return status;
7173 }
7174
7175 /*
7176 * Decode GETDEVINFO response
7177 */
7178 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7179 struct xdr_stream *xdr,
7180 void *data)
7181 {
7182 struct nfs4_getdeviceinfo_res *res = data;
7183 struct compound_hdr hdr;
7184 int status;
7185
7186 status = decode_compound_hdr(xdr, &hdr);
7187 if (status != 0)
7188 goto out;
7189 status = decode_sequence(xdr, &res->seq_res, rqstp);
7190 if (status != 0)
7191 goto out;
7192 status = decode_getdeviceinfo(xdr, res);
7193 out:
7194 return status;
7195 }
7196
7197 /*
7198 * Decode LAYOUTGET response
7199 */
7200 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7201 struct xdr_stream *xdr,
7202 void *data)
7203 {
7204 struct nfs4_layoutget_res *res = data;
7205 struct compound_hdr hdr;
7206 int status;
7207
7208 status = decode_compound_hdr(xdr, &hdr);
7209 if (status)
7210 goto out;
7211 status = decode_sequence(xdr, &res->seq_res, rqstp);
7212 if (status)
7213 goto out;
7214 status = decode_putfh(xdr);
7215 if (status)
7216 goto out;
7217 status = decode_layoutget(xdr, rqstp, res);
7218 out:
7219 return status;
7220 }
7221
7222 /*
7223 * Decode LAYOUTRETURN response
7224 */
7225 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7226 struct xdr_stream *xdr,
7227 void *data)
7228 {
7229 struct nfs4_layoutreturn_res *res = data;
7230 struct compound_hdr hdr;
7231 int status;
7232
7233 status = decode_compound_hdr(xdr, &hdr);
7234 if (status)
7235 goto out;
7236 status = decode_sequence(xdr, &res->seq_res, rqstp);
7237 if (status)
7238 goto out;
7239 status = decode_putfh(xdr);
7240 if (status)
7241 goto out;
7242 status = decode_layoutreturn(xdr, res);
7243 out:
7244 return status;
7245 }
7246
7247 /*
7248 * Decode LAYOUTCOMMIT response
7249 */
7250 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7251 struct xdr_stream *xdr,
7252 void *data)
7253 {
7254 struct nfs4_layoutcommit_res *res = data;
7255 struct compound_hdr hdr;
7256 int status;
7257
7258 status = decode_compound_hdr(xdr, &hdr);
7259 if (status)
7260 goto out;
7261 status = decode_sequence(xdr, &res->seq_res, rqstp);
7262 if (status)
7263 goto out;
7264 status = decode_putfh(xdr);
7265 if (status)
7266 goto out;
7267 status = decode_layoutcommit(xdr, rqstp, res);
7268 if (status)
7269 goto out;
7270 decode_getfattr(xdr, res->fattr, res->server);
7271 out:
7272 return status;
7273 }
7274
7275 /*
7276 * Decode SECINFO_NO_NAME response
7277 */
7278 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7279 struct xdr_stream *xdr,
7280 void *data)
7281 {
7282 struct nfs4_secinfo_res *res = data;
7283 struct compound_hdr hdr;
7284 int status;
7285
7286 status = decode_compound_hdr(xdr, &hdr);
7287 if (status)
7288 goto out;
7289 status = decode_sequence(xdr, &res->seq_res, rqstp);
7290 if (status)
7291 goto out;
7292 status = decode_putrootfh(xdr);
7293 if (status)
7294 goto out;
7295 status = decode_secinfo_no_name(xdr, res);
7296 out:
7297 return status;
7298 }
7299
7300 /*
7301 * Decode TEST_STATEID response
7302 */
7303 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7304 struct xdr_stream *xdr,
7305 void *data)
7306 {
7307 struct nfs41_test_stateid_res *res = data;
7308 struct compound_hdr hdr;
7309 int status;
7310
7311 status = decode_compound_hdr(xdr, &hdr);
7312 if (status)
7313 goto out;
7314 status = decode_sequence(xdr, &res->seq_res, rqstp);
7315 if (status)
7316 goto out;
7317 status = decode_test_stateid(xdr, res);
7318 out:
7319 return status;
7320 }
7321
7322 /*
7323 * Decode FREE_STATEID response
7324 */
7325 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7326 struct xdr_stream *xdr,
7327 void *data)
7328 {
7329 struct nfs41_free_stateid_res *res = data;
7330 struct compound_hdr hdr;
7331 int status;
7332
7333 status = decode_compound_hdr(xdr, &hdr);
7334 if (status)
7335 goto out;
7336 status = decode_sequence(xdr, &res->seq_res, rqstp);
7337 if (status)
7338 goto out;
7339 status = decode_free_stateid(xdr, res);
7340 out:
7341 return status;
7342 }
7343 #endif /* CONFIG_NFS_V4_1 */
7344
7345 /**
7346 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7347 * the local page cache.
7348 * @xdr: XDR stream where entry resides
7349 * @entry: buffer to fill in with entry data
7350 * @plus: boolean indicating whether this should be a readdirplus entry
7351 *
7352 * Returns zero if successful, otherwise a negative errno value is
7353 * returned.
7354 *
7355 * This function is not invoked during READDIR reply decoding, but
7356 * rather whenever an application invokes the getdents(2) system call
7357 * on a directory already in our cache.
7358 */
7359 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7360 bool plus)
7361 {
7362 unsigned int savep;
7363 uint32_t bitmap[3] = {0};
7364 uint32_t len;
7365 uint64_t new_cookie;
7366 __be32 *p = xdr_inline_decode(xdr, 4);
7367 if (unlikely(!p))
7368 return -EAGAIN;
7369 if (*p == xdr_zero) {
7370 p = xdr_inline_decode(xdr, 4);
7371 if (unlikely(!p))
7372 return -EAGAIN;
7373 if (*p == xdr_zero)
7374 return -EAGAIN;
7375 entry->eof = 1;
7376 return -EBADCOOKIE;
7377 }
7378
7379 p = xdr_inline_decode(xdr, 12);
7380 if (unlikely(!p))
7381 return -EAGAIN;
7382 p = xdr_decode_hyper(p, &new_cookie);
7383 entry->len = be32_to_cpup(p);
7384
7385 p = xdr_inline_decode(xdr, entry->len);
7386 if (unlikely(!p))
7387 return -EAGAIN;
7388 entry->name = (const char *) p;
7389
7390 /*
7391 * In case the server doesn't return an inode number,
7392 * we fake one here. (We don't use inode number 0,
7393 * since glibc seems to choke on it...)
7394 */
7395 entry->ino = 1;
7396 entry->fattr->valid = 0;
7397
7398 if (decode_attr_bitmap(xdr, bitmap) < 0)
7399 return -EAGAIN;
7400
7401 if (decode_attr_length(xdr, &len, &savep) < 0)
7402 return -EAGAIN;
7403
7404 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7405 NULL, entry->label, entry->server) < 0)
7406 return -EAGAIN;
7407 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7408 entry->ino = entry->fattr->mounted_on_fileid;
7409 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7410 entry->ino = entry->fattr->fileid;
7411
7412 entry->d_type = DT_UNKNOWN;
7413 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7414 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7415
7416 entry->prev_cookie = entry->cookie;
7417 entry->cookie = new_cookie;
7418
7419 return 0;
7420 }
7421
7422 /*
7423 * We need to translate between nfs status return values and
7424 * the local errno values which may not be the same.
7425 */
7426 static struct {
7427 int stat;
7428 int errno;
7429 } nfs_errtbl[] = {
7430 { NFS4_OK, 0 },
7431 { NFS4ERR_PERM, -EPERM },
7432 { NFS4ERR_NOENT, -ENOENT },
7433 { NFS4ERR_IO, -errno_NFSERR_IO},
7434 { NFS4ERR_NXIO, -ENXIO },
7435 { NFS4ERR_ACCESS, -EACCES },
7436 { NFS4ERR_EXIST, -EEXIST },
7437 { NFS4ERR_XDEV, -EXDEV },
7438 { NFS4ERR_NOTDIR, -ENOTDIR },
7439 { NFS4ERR_ISDIR, -EISDIR },
7440 { NFS4ERR_INVAL, -EINVAL },
7441 { NFS4ERR_FBIG, -EFBIG },
7442 { NFS4ERR_NOSPC, -ENOSPC },
7443 { NFS4ERR_ROFS, -EROFS },
7444 { NFS4ERR_MLINK, -EMLINK },
7445 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7446 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7447 { NFS4ERR_DQUOT, -EDQUOT },
7448 { NFS4ERR_STALE, -ESTALE },
7449 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7450 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7451 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7452 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7453 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7454 { NFS4ERR_BADTYPE, -EBADTYPE },
7455 { NFS4ERR_LOCKED, -EAGAIN },
7456 { NFS4ERR_SYMLINK, -ELOOP },
7457 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7458 { NFS4ERR_DEADLOCK, -EDEADLK },
7459 { -1, -EIO }
7460 };
7461
7462 /*
7463 * Convert an NFS error code to a local one.
7464 * This one is used jointly by NFSv2 and NFSv3.
7465 */
7466 static int
7467 nfs4_stat_to_errno(int stat)
7468 {
7469 int i;
7470 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7471 if (nfs_errtbl[i].stat == stat)
7472 return nfs_errtbl[i].errno;
7473 }
7474 if (stat <= 10000 || stat > 10100) {
7475 /* The server is looney tunes. */
7476 return -EREMOTEIO;
7477 }
7478 /* If we cannot translate the error, the recovery routines should
7479 * handle it.
7480 * Note: remaining NFSv4 error codes have values > 10000, so should
7481 * not conflict with native Linux error codes.
7482 */
7483 return -stat;
7484 }
7485
7486 #ifdef CONFIG_NFS_V4_2
7487 #include "nfs42xdr.c"
7488 #endif /* CONFIG_NFS_V4_2 */
7489
7490 #define PROC(proc, argtype, restype) \
7491 [NFSPROC4_CLNT_##proc] = { \
7492 .p_proc = NFSPROC4_COMPOUND, \
7493 .p_encode = nfs4_xdr_##argtype, \
7494 .p_decode = nfs4_xdr_##restype, \
7495 .p_arglen = NFS4_##argtype##_sz, \
7496 .p_replen = NFS4_##restype##_sz, \
7497 .p_statidx = NFSPROC4_CLNT_##proc, \
7498 .p_name = #proc, \
7499 }
7500
7501 #define STUB(proc) \
7502 [NFSPROC4_CLNT_##proc] = { \
7503 .p_name = #proc, \
7504 }
7505
7506 #if defined(CONFIG_NFS_V4_1)
7507 #define PROC41(proc, argtype, restype) \
7508 PROC(proc, argtype, restype)
7509 #else
7510 #define PROC41(proc, argtype, restype) \
7511 STUB(proc)
7512 #endif
7513
7514 #if defined(CONFIG_NFS_V4_2)
7515 #define PROC42(proc, argtype, restype) \
7516 PROC(proc, argtype, restype)
7517 #else
7518 #define PROC42(proc, argtype, restype) \
7519 STUB(proc)
7520 #endif
7521
7522 const struct rpc_procinfo nfs4_procedures[] = {
7523 PROC(READ, enc_read, dec_read),
7524 PROC(WRITE, enc_write, dec_write),
7525 PROC(COMMIT, enc_commit, dec_commit),
7526 PROC(OPEN, enc_open, dec_open),
7527 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7528 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7529 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7530 PROC(CLOSE, enc_close, dec_close),
7531 PROC(SETATTR, enc_setattr, dec_setattr),
7532 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7533 PROC(RENEW, enc_renew, dec_renew),
7534 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7535 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7536 PROC(LOCK, enc_lock, dec_lock),
7537 PROC(LOCKT, enc_lockt, dec_lockt),
7538 PROC(LOCKU, enc_locku, dec_locku),
7539 PROC(ACCESS, enc_access, dec_access),
7540 PROC(GETATTR, enc_getattr, dec_getattr),
7541 PROC(LOOKUP, enc_lookup, dec_lookup),
7542 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7543 PROC(REMOVE, enc_remove, dec_remove),
7544 PROC(RENAME, enc_rename, dec_rename),
7545 PROC(LINK, enc_link, dec_link),
7546 PROC(SYMLINK, enc_symlink, dec_symlink),
7547 PROC(CREATE, enc_create, dec_create),
7548 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7549 PROC(STATFS, enc_statfs, dec_statfs),
7550 PROC(READLINK, enc_readlink, dec_readlink),
7551 PROC(READDIR, enc_readdir, dec_readdir),
7552 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7553 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7554 PROC(GETACL, enc_getacl, dec_getacl),
7555 PROC(SETACL, enc_setacl, dec_setacl),
7556 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7557 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7558 PROC(SECINFO, enc_secinfo, dec_secinfo),
7559 PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present),
7560 PROC41(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7561 PROC41(CREATE_SESSION, enc_create_session, dec_create_session),
7562 PROC41(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7563 PROC41(SEQUENCE, enc_sequence, dec_sequence),
7564 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7565 PROC41(RECLAIM_COMPLETE,enc_reclaim_complete, dec_reclaim_complete),
7566 PROC41(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7567 PROC41(LAYOUTGET, enc_layoutget, dec_layoutget),
7568 PROC41(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7569 PROC41(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7570 PROC41(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7571 PROC41(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7572 PROC41(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7573 STUB(GETDEVICELIST),
7574 PROC41(BIND_CONN_TO_SESSION,
7575 enc_bind_conn_to_session, dec_bind_conn_to_session),
7576 PROC41(DESTROY_CLIENTID,enc_destroy_clientid, dec_destroy_clientid),
7577 PROC42(SEEK, enc_seek, dec_seek),
7578 PROC42(ALLOCATE, enc_allocate, dec_allocate),
7579 PROC42(DEALLOCATE, enc_deallocate, dec_deallocate),
7580 PROC42(LAYOUTSTATS, enc_layoutstats, dec_layoutstats),
7581 PROC42(CLONE, enc_clone, dec_clone),
7582 PROC42(COPY, enc_copy, dec_copy),
7583 PROC42(OFFLOAD_CANCEL, enc_offload_cancel, dec_offload_cancel),
7584 PROC42(COPY_NOTIFY, enc_copy_notify, dec_copy_notify),
7585 PROC(LOOKUPP, enc_lookupp, dec_lookupp),
7586 PROC42(LAYOUTERROR, enc_layouterror, dec_layouterror),
7587 };
7588
7589 static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7590 const struct rpc_version nfs_version4 = {
7591 .number = 4,
7592 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7593 .procs = nfs4_procedures,
7594 .counts = nfs_version4_counts,
7595 };
7596
7597 /*
7598 * Local variables:
7599 * c-basic-offset: 8
7600 * End:
7601 */
Linux with added FPC-III support