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 "internal.h"
58 #include "nfs4idmap.h"
59 #include "nfs4session.h"
60 #include "pnfs.h"
61 #include "netns.h"
62 
63 #define NFSDBG_FACILITY		NFSDBG_XDR
64 
65 /* Mapping from NFS error code to "errno" error code. */
66 #define errno_NFSERR_IO		EIO
67 
68 struct compound_hdr;
69 static int nfs4_stat_to_errno(int);
70 static void encode_layoutget(struct xdr_stream *xdr,
71 			     const struct nfs4_layoutget_args *args,
72 			     struct compound_hdr *hdr);
73 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
74 			     struct nfs4_layoutget_res *res);
75 
76 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
77 #ifdef DEBUG
78 #define NFS4_MAXTAGLEN		20
79 #else
80 #define NFS4_MAXTAGLEN		0
81 #endif
82 
83 /* lock,open owner id:
84  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
85  */
86 #define open_owner_id_maxsz	(1 + 2 + 1 + 1 + 2)
87 #define lock_owner_id_maxsz	(1 + 1 + 4)
88 #define decode_lockowner_maxsz	(1 + XDR_QUADLEN(IDMAP_NAMESZ))
89 #define compound_encode_hdr_maxsz	(3 + (NFS4_MAXTAGLEN >> 2))
90 #define compound_decode_hdr_maxsz	(3 + (NFS4_MAXTAGLEN >> 2))
91 #define op_encode_hdr_maxsz	(1)
92 #define op_decode_hdr_maxsz	(2)
93 #define encode_stateid_maxsz	(XDR_QUADLEN(NFS4_STATEID_SIZE))
94 #define decode_stateid_maxsz	(XDR_QUADLEN(NFS4_STATEID_SIZE))
95 #define encode_verifier_maxsz	(XDR_QUADLEN(NFS4_VERIFIER_SIZE))
96 #define decode_verifier_maxsz	(XDR_QUADLEN(NFS4_VERIFIER_SIZE))
97 #define encode_putfh_maxsz	(op_encode_hdr_maxsz + 1 + \
98 				(NFS4_FHSIZE >> 2))
99 #define decode_putfh_maxsz	(op_decode_hdr_maxsz)
100 #define encode_putrootfh_maxsz	(op_encode_hdr_maxsz)
101 #define decode_putrootfh_maxsz	(op_decode_hdr_maxsz)
102 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
103 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
104 				((3+NFS4_FHSIZE) >> 2))
105 #define nfs4_fattr_bitmap_maxsz 4
106 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
107 #define nfstime4_maxsz		(3)
108 #define nfs4_name_maxsz		(1 + ((3 + NFS4_MAXNAMLEN) >> 2))
109 #define nfs4_path_maxsz		(1 + ((3 + NFS4_MAXPATHLEN) >> 2))
110 #define nfs4_owner_maxsz	(1 + XDR_QUADLEN(IDMAP_NAMESZ))
111 #define nfs4_group_maxsz	(1 + XDR_QUADLEN(IDMAP_NAMESZ))
112 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
113 /* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
114 #define	nfs4_label_maxsz	(4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
115 #else
116 #define	nfs4_label_maxsz	0
117 #endif
118 /* We support only one layout type per file system */
119 #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
120 /* This is based on getfattr, which uses the most attributes: */
121 #define nfs4_fattr_value_maxsz	(1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
122 				3*nfstime4_maxsz + \
123 				nfs4_owner_maxsz + \
124 				nfs4_group_maxsz + nfs4_label_maxsz + \
125 				 decode_mdsthreshold_maxsz))
126 #define nfs4_fattr_maxsz	(nfs4_fattr_bitmap_maxsz + \
127 				nfs4_fattr_value_maxsz)
128 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
129 #define encode_attrs_maxsz	(nfs4_fattr_bitmap_maxsz + \
130 				 1 + 2 + 1 + \
131 				nfs4_owner_maxsz + \
132 				nfs4_group_maxsz + \
133 				nfs4_label_maxsz + \
134 				1 + nfstime4_maxsz + \
135 				1 + nfstime4_maxsz)
136 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
137 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
138 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
139 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
140 #define encode_fsinfo_maxsz	(encode_getattr_maxsz)
141 /* The 5 accounts for the PNFS attributes, and assumes that at most three
142  * layout types will be returned.
143  */
144 #define decode_fsinfo_maxsz	(op_decode_hdr_maxsz + \
145 				 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
146 #define encode_renew_maxsz	(op_encode_hdr_maxsz + 3)
147 #define decode_renew_maxsz	(op_decode_hdr_maxsz)
148 #define encode_setclientid_maxsz \
149 				(op_encode_hdr_maxsz + \
150 				XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
151 				/* client name */ \
152 				1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
153 				1 /* sc_prog */ + \
154 				1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
155 				1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
156 				1) /* sc_cb_ident */
157 #define decode_setclientid_maxsz \
158 				(op_decode_hdr_maxsz + \
159 				2 /* clientid */ + \
160 				XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
161 				1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
162 				1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
163 #define encode_setclientid_confirm_maxsz \
164 				(op_encode_hdr_maxsz + \
165 				3 + (NFS4_VERIFIER_SIZE >> 2))
166 #define decode_setclientid_confirm_maxsz \
167 				(op_decode_hdr_maxsz)
168 #define encode_lookup_maxsz	(op_encode_hdr_maxsz + nfs4_name_maxsz)
169 #define decode_lookup_maxsz	(op_decode_hdr_maxsz)
170 #define encode_lookupp_maxsz	(op_encode_hdr_maxsz)
171 #define decode_lookupp_maxsz	(op_decode_hdr_maxsz)
172 #define encode_share_access_maxsz \
173 				(2)
174 #define encode_createmode_maxsz	(1 + encode_attrs_maxsz + encode_verifier_maxsz)
175 #define encode_opentype_maxsz	(1 + encode_createmode_maxsz)
176 #define encode_claim_null_maxsz	(1 + nfs4_name_maxsz)
177 #define encode_open_maxsz	(op_encode_hdr_maxsz + \
178 				2 + encode_share_access_maxsz + 2 + \
179 				open_owner_id_maxsz + \
180 				encode_opentype_maxsz + \
181 				encode_claim_null_maxsz)
182 #define decode_space_limit_maxsz	(3)
183 #define decode_ace_maxsz	(3 + nfs4_owner_maxsz)
184 #define decode_delegation_maxsz	(1 + decode_stateid_maxsz + 1 + \
185 				decode_space_limit_maxsz + \
186 				decode_ace_maxsz)
187 #define decode_change_info_maxsz	(5)
188 #define decode_open_maxsz	(op_decode_hdr_maxsz + \
189 				decode_stateid_maxsz + \
190 				decode_change_info_maxsz + 1 + \
191 				nfs4_fattr_bitmap_maxsz + \
192 				decode_delegation_maxsz)
193 #define encode_open_confirm_maxsz \
194 				(op_encode_hdr_maxsz + \
195 				 encode_stateid_maxsz + 1)
196 #define decode_open_confirm_maxsz \
197 				(op_decode_hdr_maxsz + \
198 				 decode_stateid_maxsz)
199 #define encode_open_downgrade_maxsz \
200 				(op_encode_hdr_maxsz + \
201 				 encode_stateid_maxsz + 1 + \
202 				 encode_share_access_maxsz)
203 #define decode_open_downgrade_maxsz \
204 				(op_decode_hdr_maxsz + \
205 				 decode_stateid_maxsz)
206 #define encode_close_maxsz	(op_encode_hdr_maxsz + \
207 				 1 + encode_stateid_maxsz)
208 #define decode_close_maxsz	(op_decode_hdr_maxsz + \
209 				 decode_stateid_maxsz)
210 #define encode_setattr_maxsz	(op_encode_hdr_maxsz + \
211 				 encode_stateid_maxsz + \
212 				 encode_attrs_maxsz)
213 #define decode_setattr_maxsz	(op_decode_hdr_maxsz + \
214 				 nfs4_fattr_bitmap_maxsz)
215 #define encode_read_maxsz	(op_encode_hdr_maxsz + \
216 				 encode_stateid_maxsz + 3)
217 #define decode_read_maxsz	(op_decode_hdr_maxsz + 2)
218 #define encode_readdir_maxsz	(op_encode_hdr_maxsz + \
219 				 2 + encode_verifier_maxsz + 5 + \
220 				nfs4_label_maxsz)
221 #define decode_readdir_maxsz	(op_decode_hdr_maxsz + \
222 				 decode_verifier_maxsz)
223 #define encode_readlink_maxsz	(op_encode_hdr_maxsz)
224 #define decode_readlink_maxsz	(op_decode_hdr_maxsz + 1)
225 #define encode_write_maxsz	(op_encode_hdr_maxsz + \
226 				 encode_stateid_maxsz + 4)
227 #define decode_write_maxsz	(op_decode_hdr_maxsz + \
228 				 2 + decode_verifier_maxsz)
229 #define encode_commit_maxsz	(op_encode_hdr_maxsz + 3)
230 #define decode_commit_maxsz	(op_decode_hdr_maxsz + \
231 				 decode_verifier_maxsz)
232 #define encode_remove_maxsz	(op_encode_hdr_maxsz + \
233 				nfs4_name_maxsz)
234 #define decode_remove_maxsz	(op_decode_hdr_maxsz + \
235 				 decode_change_info_maxsz)
236 #define encode_rename_maxsz	(op_encode_hdr_maxsz + \
237 				2 * nfs4_name_maxsz)
238 #define decode_rename_maxsz	(op_decode_hdr_maxsz + \
239 				 decode_change_info_maxsz + \
240 				 decode_change_info_maxsz)
241 #define encode_link_maxsz	(op_encode_hdr_maxsz + \
242 				nfs4_name_maxsz)
243 #define decode_link_maxsz	(op_decode_hdr_maxsz + decode_change_info_maxsz)
244 #define encode_lockowner_maxsz	(7)
245 #define encode_lock_maxsz	(op_encode_hdr_maxsz + \
246 				 7 + \
247 				 1 + encode_stateid_maxsz + 1 + \
248 				 encode_lockowner_maxsz)
249 #define decode_lock_denied_maxsz \
250 				(8 + decode_lockowner_maxsz)
251 #define decode_lock_maxsz	(op_decode_hdr_maxsz + \
252 				 decode_lock_denied_maxsz)
253 #define encode_lockt_maxsz	(op_encode_hdr_maxsz + 5 + \
254 				encode_lockowner_maxsz)
255 #define decode_lockt_maxsz	(op_decode_hdr_maxsz + \
256 				 decode_lock_denied_maxsz)
257 #define encode_locku_maxsz	(op_encode_hdr_maxsz + 3 + \
258 				 encode_stateid_maxsz + \
259 				 4)
260 #define decode_locku_maxsz	(op_decode_hdr_maxsz + \
261 				 decode_stateid_maxsz)
262 #define encode_release_lockowner_maxsz \
263 				(op_encode_hdr_maxsz + \
264 				 encode_lockowner_maxsz)
265 #define decode_release_lockowner_maxsz \
266 				(op_decode_hdr_maxsz)
267 #define encode_access_maxsz	(op_encode_hdr_maxsz + 1)
268 #define decode_access_maxsz	(op_decode_hdr_maxsz + 2)
269 #define encode_symlink_maxsz	(op_encode_hdr_maxsz + \
270 				1 + nfs4_name_maxsz + \
271 				1 + \
272 				nfs4_fattr_maxsz)
273 #define decode_symlink_maxsz	(op_decode_hdr_maxsz + 8)
274 #define encode_create_maxsz	(op_encode_hdr_maxsz + \
275 				1 + 2 + nfs4_name_maxsz + \
276 				encode_attrs_maxsz)
277 #define decode_create_maxsz	(op_decode_hdr_maxsz + \
278 				decode_change_info_maxsz + \
279 				nfs4_fattr_bitmap_maxsz)
280 #define encode_statfs_maxsz	(encode_getattr_maxsz)
281 #define decode_statfs_maxsz	(decode_getattr_maxsz)
282 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
283 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
284 #define encode_getacl_maxsz	(encode_getattr_maxsz)
285 #define decode_getacl_maxsz	(op_decode_hdr_maxsz + \
286 				 nfs4_fattr_bitmap_maxsz + 1)
287 #define encode_setacl_maxsz	(op_encode_hdr_maxsz + \
288 				 encode_stateid_maxsz + 3)
289 #define decode_setacl_maxsz	(decode_setattr_maxsz)
290 #define encode_fs_locations_maxsz \
291 				(encode_getattr_maxsz)
292 #define decode_fs_locations_maxsz \
293 				(0)
294 #define encode_secinfo_maxsz	(op_encode_hdr_maxsz + nfs4_name_maxsz)
295 #define decode_secinfo_maxsz	(op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
296 
297 #if defined(CONFIG_NFS_V4_1)
298 #define NFS4_MAX_MACHINE_NAME_LEN (64)
299 #define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
300 			 sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
301 
302 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
303 				encode_verifier_maxsz + \
304 				1 /* co_ownerid.len */ + \
305 				/* eia_clientowner */ \
306 				1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
307 				1 /* flags */ + \
308 				1 /* spa_how */ + \
309 				/* max is SP4_MACH_CRED (for now) */ + \
310 				1 + NFS4_OP_MAP_NUM_WORDS + \
311 				1 + NFS4_OP_MAP_NUM_WORDS + \
312 				1 /* implementation id array of size 1 */ + \
313 				1 /* nii_domain */ + \
314 				XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
315 				1 /* nii_name */ + \
316 				XDR_QUADLEN(IMPL_NAME_LIMIT) + \
317 				3 /* nii_date */)
318 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
319 				2 /* eir_clientid */ + \
320 				1 /* eir_sequenceid */ + \
321 				1 /* eir_flags */ + \
322 				1 /* spr_how */ + \
323 				  /* max is SP4_MACH_CRED (for now) */ + \
324 				1 + NFS4_OP_MAP_NUM_WORDS + \
325 				1 + NFS4_OP_MAP_NUM_WORDS + \
326 				2 /* eir_server_owner.so_minor_id */ + \
327 				/* eir_server_owner.so_major_id<> */ \
328 				XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
329 				/* eir_server_scope<> */ \
330 				XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
331 				1 /* eir_server_impl_id array length */ + \
332 				1 /* nii_domain */ + \
333 				XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
334 				1 /* nii_name */ + \
335 				XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
336 				3 /* nii_date */)
337 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
338 #define decode_channel_attrs_maxsz  (6 + \
339 				     1 /* ca_rdma_ird.len */ + \
340 				     1 /* ca_rdma_ird */)
341 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
342 				     2 /* csa_clientid */ + \
343 				     1 /* csa_sequence */ + \
344 				     1 /* csa_flags */ + \
345 				     encode_channel_attrs_maxsz + \
346 				     encode_channel_attrs_maxsz + \
347 				     1 /* csa_cb_program */ + \
348 				     1 /* csa_sec_parms.len (1) */ + \
349 				     1 /* cb_secflavor (AUTH_SYS) */ + \
350 				     1 /* stamp */ + \
351 				     1 /* machinename.len */ + \
352 				     XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
353 				     1 /* uid */ + \
354 				     1 /* gid */ + \
355 				     1 /* gids.len (0) */)
356 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +	\
357 				     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
358 				     1 /* csr_sequence */ + \
359 				     1 /* csr_flags */ + \
360 				     decode_channel_attrs_maxsz + \
361 				     decode_channel_attrs_maxsz)
362 #define encode_bind_conn_to_session_maxsz  (op_encode_hdr_maxsz + \
363 				     /* bctsa_sessid */ \
364 				     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
365 				     1 /* bctsa_dir */ + \
366 				     1 /* bctsa_use_conn_in_rdma_mode */)
367 #define decode_bind_conn_to_session_maxsz  (op_decode_hdr_maxsz +	\
368 				     /* bctsr_sessid */ \
369 				     XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
370 				     1 /* bctsr_dir */ + \
371 				     1 /* bctsr_use_conn_in_rdma_mode */)
372 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
373 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
374 #define encode_destroy_clientid_maxsz   (op_encode_hdr_maxsz + 2)
375 #define decode_destroy_clientid_maxsz   (op_decode_hdr_maxsz)
376 #define encode_sequence_maxsz	(op_encode_hdr_maxsz + \
377 				XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
378 #define decode_sequence_maxsz	(op_decode_hdr_maxsz + \
379 				XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
380 #define encode_reclaim_complete_maxsz	(op_encode_hdr_maxsz + 4)
381 #define decode_reclaim_complete_maxsz	(op_decode_hdr_maxsz + 4)
382 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
383 				XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
384 				1 /* layout type */ + \
385 				1 /* maxcount */ + \
386 				1 /* bitmap size */ + \
387 				1 /* notification bitmap length */ + \
388 				1 /* notification bitmap, word 0 */)
389 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
390 				1 /* layout type */ + \
391 				1 /* opaque devaddr4 length */ + \
392 				  /* devaddr4 payload is read into page */ \
393 				1 /* notification bitmap length */ + \
394 				1 /* notification bitmap, word 0 */)
395 #define encode_layoutget_maxsz	(op_encode_hdr_maxsz + 10 + \
396 				encode_stateid_maxsz)
397 #define decode_layoutget_maxsz	(op_decode_hdr_maxsz + 8 + \
398 				decode_stateid_maxsz + \
399 				XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
400 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
401 				2 /* offset */ + \
402 				2 /* length */ + \
403 				1 /* reclaim */ + \
404 				encode_stateid_maxsz + \
405 				1 /* new offset (true) */ + \
406 				2 /* last byte written */ + \
407 				1 /* nt_timechanged (false) */ + \
408 				1 /* layoutupdate4 layout type */ + \
409 				1 /* layoutupdate4 opaqueue len */)
410 				  /* the actual content of layoutupdate4 should
411 				     be allocated by drivers and spliced in
412 				     using xdr_write_pages */
413 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
414 #define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
415 				encode_stateid_maxsz + \
416 				1 + \
417 				XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
418 #define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
419 				1 + decode_stateid_maxsz)
420 #define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
421 #define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
422 #define encode_test_stateid_maxsz	(op_encode_hdr_maxsz + 2 + \
423 					 XDR_QUADLEN(NFS4_STATEID_SIZE))
424 #define decode_test_stateid_maxsz	(op_decode_hdr_maxsz + 2 + 1)
425 #define encode_free_stateid_maxsz	(op_encode_hdr_maxsz + 1 + \
426 					 XDR_QUADLEN(NFS4_STATEID_SIZE))
427 #define decode_free_stateid_maxsz	(op_decode_hdr_maxsz)
428 #else /* CONFIG_NFS_V4_1 */
429 #define encode_sequence_maxsz	0
430 #define decode_sequence_maxsz	0
431 #define encode_layoutreturn_maxsz 0
432 #define decode_layoutreturn_maxsz 0
433 #define encode_layoutget_maxsz	0
434 #define decode_layoutget_maxsz	0
435 #endif /* CONFIG_NFS_V4_1 */
436 
437 #define NFS4_enc_compound_sz	(1024)  /* XXX: large enough? */
438 #define NFS4_dec_compound_sz	(1024)  /* XXX: large enough? */
439 #define NFS4_enc_read_sz	(compound_encode_hdr_maxsz + \
440 				encode_sequence_maxsz + \
441 				encode_putfh_maxsz + \
442 				encode_read_maxsz)
443 #define NFS4_dec_read_sz	(compound_decode_hdr_maxsz + \
444 				decode_sequence_maxsz + \
445 				decode_putfh_maxsz + \
446 				decode_read_maxsz)
447 #define NFS4_enc_readlink_sz	(compound_encode_hdr_maxsz + \
448 				encode_sequence_maxsz + \
449 				encode_putfh_maxsz + \
450 				encode_readlink_maxsz)
451 #define NFS4_dec_readlink_sz	(compound_decode_hdr_maxsz + \
452 				decode_sequence_maxsz + \
453 				decode_putfh_maxsz + \
454 				decode_readlink_maxsz)
455 #define NFS4_enc_readdir_sz	(compound_encode_hdr_maxsz + \
456 				encode_sequence_maxsz + \
457 				encode_putfh_maxsz + \
458 				encode_readdir_maxsz)
459 #define NFS4_dec_readdir_sz	(compound_decode_hdr_maxsz + \
460 				decode_sequence_maxsz + \
461 				decode_putfh_maxsz + \
462 				decode_readdir_maxsz)
463 #define NFS4_enc_write_sz	(compound_encode_hdr_maxsz + \
464 				encode_sequence_maxsz + \
465 				encode_putfh_maxsz + \
466 				encode_write_maxsz + \
467 				encode_getattr_maxsz)
468 #define NFS4_dec_write_sz	(compound_decode_hdr_maxsz + \
469 				decode_sequence_maxsz + \
470 				decode_putfh_maxsz + \
471 				decode_write_maxsz + \
472 				decode_getattr_maxsz)
473 #define NFS4_enc_commit_sz	(compound_encode_hdr_maxsz + \
474 				encode_sequence_maxsz + \
475 				encode_putfh_maxsz + \
476 				encode_commit_maxsz)
477 #define NFS4_dec_commit_sz	(compound_decode_hdr_maxsz + \
478 				decode_sequence_maxsz + \
479 				decode_putfh_maxsz + \
480 				decode_commit_maxsz)
481 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
482 				encode_sequence_maxsz + \
483 				encode_putfh_maxsz + \
484 				encode_open_maxsz + \
485 				encode_access_maxsz + \
486 				encode_getfh_maxsz + \
487 				encode_getattr_maxsz + \
488 				encode_layoutget_maxsz)
489 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
490 				decode_sequence_maxsz + \
491 				decode_putfh_maxsz + \
492 				decode_open_maxsz + \
493 				decode_access_maxsz + \
494 				decode_getfh_maxsz + \
495 				decode_getattr_maxsz + \
496 				decode_layoutget_maxsz)
497 #define NFS4_enc_open_confirm_sz \
498 				(compound_encode_hdr_maxsz + \
499 				 encode_putfh_maxsz + \
500 				 encode_open_confirm_maxsz)
501 #define NFS4_dec_open_confirm_sz \
502 				(compound_decode_hdr_maxsz + \
503 				 decode_putfh_maxsz + \
504 				 decode_open_confirm_maxsz)
505 #define NFS4_enc_open_noattr_sz	(compound_encode_hdr_maxsz + \
506 					encode_sequence_maxsz + \
507 					encode_putfh_maxsz + \
508 					encode_open_maxsz + \
509 					encode_access_maxsz + \
510 					encode_getattr_maxsz + \
511 					encode_layoutget_maxsz)
512 #define NFS4_dec_open_noattr_sz	(compound_decode_hdr_maxsz + \
513 					decode_sequence_maxsz + \
514 					decode_putfh_maxsz + \
515 					decode_open_maxsz + \
516 					decode_access_maxsz + \
517 					decode_getattr_maxsz + \
518 					decode_layoutget_maxsz)
519 #define NFS4_enc_open_downgrade_sz \
520 				(compound_encode_hdr_maxsz + \
521 				 encode_sequence_maxsz + \
522 				 encode_putfh_maxsz + \
523 				 encode_layoutreturn_maxsz + \
524 				 encode_open_downgrade_maxsz)
525 #define NFS4_dec_open_downgrade_sz \
526 				(compound_decode_hdr_maxsz + \
527 				 decode_sequence_maxsz + \
528 				 decode_putfh_maxsz + \
529 				 decode_layoutreturn_maxsz + \
530 				 decode_open_downgrade_maxsz)
531 #define NFS4_enc_close_sz	(compound_encode_hdr_maxsz + \
532 				 encode_sequence_maxsz + \
533 				 encode_putfh_maxsz + \
534 				 encode_layoutreturn_maxsz + \
535 				 encode_close_maxsz + \
536 				 encode_getattr_maxsz)
537 #define NFS4_dec_close_sz	(compound_decode_hdr_maxsz + \
538 				 decode_sequence_maxsz + \
539 				 decode_putfh_maxsz + \
540 				 decode_layoutreturn_maxsz + \
541 				 decode_close_maxsz + \
542 				 decode_getattr_maxsz)
543 #define NFS4_enc_setattr_sz	(compound_encode_hdr_maxsz + \
544 				 encode_sequence_maxsz + \
545 				 encode_putfh_maxsz + \
546 				 encode_setattr_maxsz + \
547 				 encode_getattr_maxsz)
548 #define NFS4_dec_setattr_sz	(compound_decode_hdr_maxsz + \
549 				 decode_sequence_maxsz + \
550 				 decode_putfh_maxsz + \
551 				 decode_setattr_maxsz + \
552 				 decode_getattr_maxsz)
553 #define NFS4_enc_fsinfo_sz	(compound_encode_hdr_maxsz + \
554 				encode_sequence_maxsz + \
555 				encode_putfh_maxsz + \
556 				encode_fsinfo_maxsz)
557 #define NFS4_dec_fsinfo_sz	(compound_decode_hdr_maxsz + \
558 				decode_sequence_maxsz + \
559 				decode_putfh_maxsz + \
560 				decode_fsinfo_maxsz)
561 #define NFS4_enc_renew_sz	(compound_encode_hdr_maxsz + \
562 				encode_renew_maxsz)
563 #define NFS4_dec_renew_sz	(compound_decode_hdr_maxsz + \
564 				decode_renew_maxsz)
565 #define NFS4_enc_setclientid_sz	(compound_encode_hdr_maxsz + \
566 				encode_setclientid_maxsz)
567 #define NFS4_dec_setclientid_sz	(compound_decode_hdr_maxsz + \
568 				decode_setclientid_maxsz)
569 #define NFS4_enc_setclientid_confirm_sz \
570 				(compound_encode_hdr_maxsz + \
571 				encode_setclientid_confirm_maxsz)
572 #define NFS4_dec_setclientid_confirm_sz \
573 				(compound_decode_hdr_maxsz + \
574 				decode_setclientid_confirm_maxsz)
575 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
576 				encode_sequence_maxsz + \
577 				encode_putfh_maxsz + \
578 				encode_lock_maxsz)
579 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
580 				decode_sequence_maxsz + \
581 				decode_putfh_maxsz + \
582 				decode_lock_maxsz)
583 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
584 				encode_sequence_maxsz + \
585 				encode_putfh_maxsz + \
586 				encode_lockt_maxsz)
587 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
588 				 decode_sequence_maxsz + \
589 				 decode_putfh_maxsz + \
590 				 decode_lockt_maxsz)
591 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
592 				encode_sequence_maxsz + \
593 				encode_putfh_maxsz + \
594 				encode_locku_maxsz)
595 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
596 				decode_sequence_maxsz + \
597 				decode_putfh_maxsz + \
598 				decode_locku_maxsz)
599 #define NFS4_enc_release_lockowner_sz \
600 				(compound_encode_hdr_maxsz + \
601 				 encode_lockowner_maxsz)
602 #define NFS4_dec_release_lockowner_sz \
603 				(compound_decode_hdr_maxsz + \
604 				 decode_lockowner_maxsz)
605 #define NFS4_enc_access_sz	(compound_encode_hdr_maxsz + \
606 				encode_sequence_maxsz + \
607 				encode_putfh_maxsz + \
608 				encode_access_maxsz + \
609 				encode_getattr_maxsz)
610 #define NFS4_dec_access_sz	(compound_decode_hdr_maxsz + \
611 				decode_sequence_maxsz + \
612 				decode_putfh_maxsz + \
613 				decode_access_maxsz + \
614 				decode_getattr_maxsz)
615 #define NFS4_enc_getattr_sz	(compound_encode_hdr_maxsz + \
616 				encode_sequence_maxsz + \
617 				encode_putfh_maxsz + \
618 				encode_getattr_maxsz + \
619 				encode_renew_maxsz)
620 #define NFS4_dec_getattr_sz	(compound_decode_hdr_maxsz + \
621 				decode_sequence_maxsz + \
622 				decode_putfh_maxsz + \
623 				decode_getattr_maxsz + \
624 				decode_renew_maxsz)
625 #define NFS4_enc_lookup_sz	(compound_encode_hdr_maxsz + \
626 				encode_sequence_maxsz + \
627 				encode_putfh_maxsz + \
628 				encode_lookup_maxsz + \
629 				encode_getattr_maxsz + \
630 				encode_getfh_maxsz)
631 #define NFS4_dec_lookup_sz	(compound_decode_hdr_maxsz + \
632 				decode_sequence_maxsz + \
633 				decode_putfh_maxsz + \
634 				decode_lookup_maxsz + \
635 				decode_getattr_maxsz + \
636 				decode_getfh_maxsz)
637 #define NFS4_enc_lookupp_sz	(compound_encode_hdr_maxsz + \
638 				encode_sequence_maxsz + \
639 				encode_putfh_maxsz + \
640 				encode_lookupp_maxsz + \
641 				encode_getattr_maxsz + \
642 				encode_getfh_maxsz)
643 #define NFS4_dec_lookupp_sz	(compound_decode_hdr_maxsz + \
644 				decode_sequence_maxsz + \
645 				decode_putfh_maxsz + \
646 				decode_lookupp_maxsz + \
647 				decode_getattr_maxsz + \
648 				decode_getfh_maxsz)
649 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
650 				encode_sequence_maxsz + \
651 				encode_putrootfh_maxsz + \
652 				encode_getattr_maxsz + \
653 				encode_getfh_maxsz)
654 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
655 				decode_sequence_maxsz + \
656 				decode_putrootfh_maxsz + \
657 				decode_getattr_maxsz + \
658 				decode_getfh_maxsz)
659 #define NFS4_enc_remove_sz	(compound_encode_hdr_maxsz + \
660 				encode_sequence_maxsz + \
661 				encode_putfh_maxsz + \
662 				encode_remove_maxsz)
663 #define NFS4_dec_remove_sz	(compound_decode_hdr_maxsz + \
664 				decode_sequence_maxsz + \
665 				decode_putfh_maxsz + \
666 				decode_remove_maxsz)
667 #define NFS4_enc_rename_sz	(compound_encode_hdr_maxsz + \
668 				encode_sequence_maxsz + \
669 				encode_putfh_maxsz + \
670 				encode_savefh_maxsz + \
671 				encode_putfh_maxsz + \
672 				encode_rename_maxsz)
673 #define NFS4_dec_rename_sz	(compound_decode_hdr_maxsz + \
674 				decode_sequence_maxsz + \
675 				decode_putfh_maxsz + \
676 				decode_savefh_maxsz + \
677 				decode_putfh_maxsz + \
678 				decode_rename_maxsz)
679 #define NFS4_enc_link_sz	(compound_encode_hdr_maxsz + \
680 				encode_sequence_maxsz + \
681 				encode_putfh_maxsz + \
682 				encode_savefh_maxsz + \
683 				encode_putfh_maxsz + \
684 				encode_link_maxsz + \
685 				encode_restorefh_maxsz + \
686 				encode_getattr_maxsz)
687 #define NFS4_dec_link_sz	(compound_decode_hdr_maxsz + \
688 				decode_sequence_maxsz + \
689 				decode_putfh_maxsz + \
690 				decode_savefh_maxsz + \
691 				decode_putfh_maxsz + \
692 				decode_link_maxsz + \
693 				decode_restorefh_maxsz + \
694 				decode_getattr_maxsz)
695 #define NFS4_enc_symlink_sz	(compound_encode_hdr_maxsz + \
696 				encode_sequence_maxsz + \
697 				encode_putfh_maxsz + \
698 				encode_symlink_maxsz + \
699 				encode_getattr_maxsz + \
700 				encode_getfh_maxsz)
701 #define NFS4_dec_symlink_sz	(compound_decode_hdr_maxsz + \
702 				decode_sequence_maxsz + \
703 				decode_putfh_maxsz + \
704 				decode_symlink_maxsz + \
705 				decode_getattr_maxsz + \
706 				decode_getfh_maxsz)
707 #define NFS4_enc_create_sz	(compound_encode_hdr_maxsz + \
708 				encode_sequence_maxsz + \
709 				encode_putfh_maxsz + \
710 				encode_create_maxsz + \
711 				encode_getfh_maxsz + \
712 				encode_getattr_maxsz)
713 #define NFS4_dec_create_sz	(compound_decode_hdr_maxsz + \
714 				decode_sequence_maxsz + \
715 				decode_putfh_maxsz + \
716 				decode_create_maxsz + \
717 				decode_getfh_maxsz + \
718 				decode_getattr_maxsz)
719 #define NFS4_enc_pathconf_sz	(compound_encode_hdr_maxsz + \
720 				encode_sequence_maxsz + \
721 				encode_putfh_maxsz + \
722 				encode_getattr_maxsz)
723 #define NFS4_dec_pathconf_sz	(compound_decode_hdr_maxsz + \
724 				decode_sequence_maxsz + \
725 				decode_putfh_maxsz + \
726 				decode_getattr_maxsz)
727 #define NFS4_enc_statfs_sz	(compound_encode_hdr_maxsz + \
728 				encode_sequence_maxsz + \
729 				encode_putfh_maxsz + \
730 				encode_statfs_maxsz)
731 #define NFS4_dec_statfs_sz	(compound_decode_hdr_maxsz + \
732 				decode_sequence_maxsz + \
733 				decode_putfh_maxsz + \
734 				decode_statfs_maxsz)
735 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
736 				encode_sequence_maxsz + \
737 				encode_putfh_maxsz + \
738 				encode_getattr_maxsz)
739 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
740 				decode_sequence_maxsz + \
741 				decode_putfh_maxsz + \
742 				decode_getattr_maxsz)
743 #define NFS4_enc_delegreturn_sz	(compound_encode_hdr_maxsz + \
744 				encode_sequence_maxsz + \
745 				encode_putfh_maxsz + \
746 				encode_layoutreturn_maxsz + \
747 				encode_delegreturn_maxsz + \
748 				encode_getattr_maxsz)
749 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
750 				decode_sequence_maxsz + \
751 				decode_putfh_maxsz + \
752 				decode_layoutreturn_maxsz + \
753 				decode_delegreturn_maxsz + \
754 				decode_getattr_maxsz)
755 #define NFS4_enc_getacl_sz	(compound_encode_hdr_maxsz + \
756 				encode_sequence_maxsz + \
757 				encode_putfh_maxsz + \
758 				encode_getacl_maxsz)
759 #define NFS4_dec_getacl_sz	(compound_decode_hdr_maxsz + \
760 				decode_sequence_maxsz + \
761 				decode_putfh_maxsz + \
762 				decode_getacl_maxsz)
763 #define NFS4_enc_setacl_sz	(compound_encode_hdr_maxsz + \
764 				encode_sequence_maxsz + \
765 				encode_putfh_maxsz + \
766 				encode_setacl_maxsz)
767 #define NFS4_dec_setacl_sz	(compound_decode_hdr_maxsz + \
768 				decode_sequence_maxsz + \
769 				decode_putfh_maxsz + \
770 				decode_setacl_maxsz)
771 #define NFS4_enc_fs_locations_sz \
772 				(compound_encode_hdr_maxsz + \
773 				 encode_sequence_maxsz + \
774 				 encode_putfh_maxsz + \
775 				 encode_lookup_maxsz + \
776 				 encode_fs_locations_maxsz + \
777 				 encode_renew_maxsz)
778 #define NFS4_dec_fs_locations_sz \
779 				(compound_decode_hdr_maxsz + \
780 				 decode_sequence_maxsz + \
781 				 decode_putfh_maxsz + \
782 				 decode_lookup_maxsz + \
783 				 decode_fs_locations_maxsz + \
784 				 decode_renew_maxsz)
785 #define NFS4_enc_secinfo_sz 	(compound_encode_hdr_maxsz + \
786 				encode_sequence_maxsz + \
787 				encode_putfh_maxsz + \
788 				encode_secinfo_maxsz)
789 #define NFS4_dec_secinfo_sz	(compound_decode_hdr_maxsz + \
790 				decode_sequence_maxsz + \
791 				decode_putfh_maxsz + \
792 				decode_secinfo_maxsz)
793 #define NFS4_enc_fsid_present_sz \
794 				(compound_encode_hdr_maxsz + \
795 				 encode_sequence_maxsz + \
796 				 encode_putfh_maxsz + \
797 				 encode_getfh_maxsz + \
798 				 encode_renew_maxsz)
799 #define NFS4_dec_fsid_present_sz \
800 				(compound_decode_hdr_maxsz + \
801 				 decode_sequence_maxsz + \
802 				 decode_putfh_maxsz + \
803 				 decode_getfh_maxsz + \
804 				 decode_renew_maxsz)
805 #if defined(CONFIG_NFS_V4_1)
806 #define NFS4_enc_bind_conn_to_session_sz \
807 				(compound_encode_hdr_maxsz + \
808 				 encode_bind_conn_to_session_maxsz)
809 #define NFS4_dec_bind_conn_to_session_sz \
810 				(compound_decode_hdr_maxsz + \
811 				 decode_bind_conn_to_session_maxsz)
812 #define NFS4_enc_exchange_id_sz \
813 				(compound_encode_hdr_maxsz + \
814 				 encode_exchange_id_maxsz)
815 #define NFS4_dec_exchange_id_sz \
816 				(compound_decode_hdr_maxsz + \
817 				 decode_exchange_id_maxsz)
818 #define NFS4_enc_create_session_sz \
819 				(compound_encode_hdr_maxsz + \
820 				 encode_create_session_maxsz)
821 #define NFS4_dec_create_session_sz \
822 				(compound_decode_hdr_maxsz + \
823 				 decode_create_session_maxsz)
824 #define NFS4_enc_destroy_session_sz	(compound_encode_hdr_maxsz + \
825 					 encode_destroy_session_maxsz)
826 #define NFS4_dec_destroy_session_sz	(compound_decode_hdr_maxsz + \
827 					 decode_destroy_session_maxsz)
828 #define NFS4_enc_destroy_clientid_sz	(compound_encode_hdr_maxsz + \
829 					 encode_destroy_clientid_maxsz)
830 #define NFS4_dec_destroy_clientid_sz	(compound_decode_hdr_maxsz + \
831 					 decode_destroy_clientid_maxsz)
832 #define NFS4_enc_sequence_sz \
833 				(compound_decode_hdr_maxsz + \
834 				 encode_sequence_maxsz)
835 #define NFS4_dec_sequence_sz \
836 				(compound_decode_hdr_maxsz + \
837 				 decode_sequence_maxsz)
838 #define NFS4_enc_get_lease_time_sz	(compound_encode_hdr_maxsz + \
839 					 encode_sequence_maxsz + \
840 					 encode_putrootfh_maxsz + \
841 					 encode_fsinfo_maxsz)
842 #define NFS4_dec_get_lease_time_sz	(compound_decode_hdr_maxsz + \
843 					 decode_sequence_maxsz + \
844 					 decode_putrootfh_maxsz + \
845 					 decode_fsinfo_maxsz)
846 #define NFS4_enc_reclaim_complete_sz	(compound_encode_hdr_maxsz + \
847 					 encode_sequence_maxsz + \
848 					 encode_reclaim_complete_maxsz)
849 #define NFS4_dec_reclaim_complete_sz	(compound_decode_hdr_maxsz + \
850 					 decode_sequence_maxsz + \
851 					 decode_reclaim_complete_maxsz)
852 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
853 				encode_sequence_maxsz +\
854 				encode_getdeviceinfo_maxsz)
855 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
856 				decode_sequence_maxsz + \
857 				decode_getdeviceinfo_maxsz)
858 #define NFS4_enc_layoutget_sz	(compound_encode_hdr_maxsz + \
859 				encode_sequence_maxsz + \
860 				encode_putfh_maxsz +        \
861 				encode_layoutget_maxsz)
862 #define NFS4_dec_layoutget_sz	(compound_decode_hdr_maxsz + \
863 				decode_sequence_maxsz + \
864 				decode_putfh_maxsz +        \
865 				decode_layoutget_maxsz)
866 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
867 				encode_sequence_maxsz +\
868 				encode_putfh_maxsz + \
869 				encode_layoutcommit_maxsz + \
870 				encode_getattr_maxsz)
871 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
872 				decode_sequence_maxsz + \
873 				decode_putfh_maxsz + \
874 				decode_layoutcommit_maxsz + \
875 				decode_getattr_maxsz)
876 #define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
877 				encode_sequence_maxsz + \
878 				encode_putfh_maxsz + \
879 				encode_layoutreturn_maxsz)
880 #define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
881 				decode_sequence_maxsz + \
882 				decode_putfh_maxsz + \
883 				decode_layoutreturn_maxsz)
884 #define NFS4_enc_secinfo_no_name_sz	(compound_encode_hdr_maxsz + \
885 					encode_sequence_maxsz + \
886 					encode_putrootfh_maxsz +\
887 					encode_secinfo_no_name_maxsz)
888 #define NFS4_dec_secinfo_no_name_sz	(compound_decode_hdr_maxsz + \
889 					decode_sequence_maxsz + \
890 					decode_putrootfh_maxsz + \
891 					decode_secinfo_no_name_maxsz)
892 #define NFS4_enc_test_stateid_sz	(compound_encode_hdr_maxsz + \
893 					 encode_sequence_maxsz + \
894 					 encode_test_stateid_maxsz)
895 #define NFS4_dec_test_stateid_sz	(compound_decode_hdr_maxsz + \
896 					 decode_sequence_maxsz + \
897 					 decode_test_stateid_maxsz)
898 #define NFS4_enc_free_stateid_sz	(compound_encode_hdr_maxsz + \
899 					 encode_sequence_maxsz + \
900 					 encode_free_stateid_maxsz)
901 #define NFS4_dec_free_stateid_sz	(compound_decode_hdr_maxsz + \
902 					 decode_sequence_maxsz + \
903 					 decode_free_stateid_maxsz)
904 
905 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
906 				      compound_encode_hdr_maxsz +
907 				      encode_sequence_maxsz +
908 				      encode_putfh_maxsz +
909 				      encode_getattr_maxsz) *
910 				     XDR_UNIT);
911 
912 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
913 				     compound_decode_hdr_maxsz +
914 				     decode_sequence_maxsz +
915 				     decode_putfh_maxsz) *
916 				    XDR_UNIT);
917 
918 const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
919 					   compound_decode_hdr_maxsz +
920 					   decode_sequence_maxsz) *
921 					  XDR_UNIT);
922 EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
923 #endif /* CONFIG_NFS_V4_1 */
924 
925 static const umode_t nfs_type2fmt[] = {
926 	[NF4BAD] = 0,
927 	[NF4REG] = S_IFREG,
928 	[NF4DIR] = S_IFDIR,
929 	[NF4BLK] = S_IFBLK,
930 	[NF4CHR] = S_IFCHR,
931 	[NF4LNK] = S_IFLNK,
932 	[NF4SOCK] = S_IFSOCK,
933 	[NF4FIFO] = S_IFIFO,
934 	[NF4ATTRDIR] = 0,
935 	[NF4NAMEDATTR] = 0,
936 };
937 
938 struct compound_hdr {
939 	int32_t		status;
940 	uint32_t	nops;
941 	__be32 *	nops_p;
942 	uint32_t	taglen;
943 	char *		tag;
944 	uint32_t	replen;		/* expected reply words */
945 	u32		minorversion;
946 };
947 
reserve_space(struct xdr_stream * xdr,size_t nbytes)948 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
949 {
950 	__be32 *p = xdr_reserve_space(xdr, nbytes);
951 	BUG_ON(!p);
952 	return p;
953 }
954 
encode_opaque_fixed(struct xdr_stream * xdr,const void * buf,size_t len)955 static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
956 {
957 	WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
958 }
959 
encode_string(struct xdr_stream * xdr,unsigned int len,const char * str)960 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
961 {
962 	WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0);
963 }
964 
encode_uint32(struct xdr_stream * xdr,u32 n)965 static void encode_uint32(struct xdr_stream *xdr, u32 n)
966 {
967 	WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
968 }
969 
encode_uint64(struct xdr_stream * xdr,u64 n)970 static void encode_uint64(struct xdr_stream *xdr, u64 n)
971 {
972 	WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0);
973 }
974 
xdr_encode_bitmap4(struct xdr_stream * xdr,const __u32 * bitmap,size_t len)975 static ssize_t xdr_encode_bitmap4(struct xdr_stream *xdr,
976 		const __u32 *bitmap, size_t len)
977 {
978 	ssize_t ret;
979 
980 	/* Trim empty words */
981 	while (len > 0 && bitmap[len-1] == 0)
982 		len--;
983 	ret = xdr_stream_encode_uint32_array(xdr, bitmap, len);
984 	if (WARN_ON_ONCE(ret < 0))
985 		return ret;
986 	return len;
987 }
988 
mask_bitmap4(const __u32 * bitmap,const __u32 * mask,__u32 * res,size_t len)989 static size_t mask_bitmap4(const __u32 *bitmap, const __u32 *mask,
990 		__u32 *res, size_t len)
991 {
992 	size_t i;
993 	__u32 tmp;
994 
995 	while (len > 0 && (bitmap[len-1] == 0 || mask[len-1] == 0))
996 		len--;
997 	for (i = len; i-- > 0;) {
998 		tmp = bitmap[i] & mask[i];
999 		res[i] = tmp;
1000 	}
1001 	return len;
1002 }
1003 
encode_nfs4_seqid(struct xdr_stream * xdr,const struct nfs_seqid * seqid)1004 static void encode_nfs4_seqid(struct xdr_stream *xdr,
1005 		const struct nfs_seqid *seqid)
1006 {
1007 	if (seqid != NULL)
1008 		encode_uint32(xdr, seqid->sequence->counter);
1009 	else
1010 		encode_uint32(xdr, 0);
1011 }
1012 
encode_compound_hdr(struct xdr_stream * xdr,struct rpc_rqst * req,struct compound_hdr * hdr)1013 static void encode_compound_hdr(struct xdr_stream *xdr,
1014 				struct rpc_rqst *req,
1015 				struct compound_hdr *hdr)
1016 {
1017 	__be32 *p;
1018 	struct rpc_auth *auth = req->rq_cred->cr_auth;
1019 
1020 	/* initialize running count of expected bytes in reply.
1021 	 * NOTE: the replied tag SHOULD be the same is the one sent,
1022 	 * but this is not required as a MUST for the server to do so. */
1023 	hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
1024 
1025 	WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
1026 	encode_string(xdr, hdr->taglen, hdr->tag);
1027 	p = reserve_space(xdr, 8);
1028 	*p++ = cpu_to_be32(hdr->minorversion);
1029 	hdr->nops_p = p;
1030 	*p = cpu_to_be32(hdr->nops);
1031 }
1032 
encode_op_hdr(struct xdr_stream * xdr,enum nfs_opnum4 op,uint32_t replen,struct compound_hdr * hdr)1033 static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
1034 		uint32_t replen,
1035 		struct compound_hdr *hdr)
1036 {
1037 	encode_uint32(xdr, op);
1038 	hdr->nops++;
1039 	hdr->replen += replen;
1040 }
1041 
encode_nops(struct compound_hdr * hdr)1042 static void encode_nops(struct compound_hdr *hdr)
1043 {
1044 	WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
1045 	*hdr->nops_p = htonl(hdr->nops);
1046 }
1047 
encode_nfs4_stateid(struct xdr_stream * xdr,const nfs4_stateid * stateid)1048 static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1049 {
1050 	encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1051 }
1052 
encode_nfs4_verifier(struct xdr_stream * xdr,const nfs4_verifier * verf)1053 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1054 {
1055 	encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1056 }
1057 
1058 static __be32 *
xdr_encode_nfstime4(__be32 * p,const struct timespec * t)1059 xdr_encode_nfstime4(__be32 *p, const struct timespec *t)
1060 {
1061 	p = xdr_encode_hyper(p, (__s64)t->tv_sec);
1062 	*p++ = cpu_to_be32(t->tv_nsec);
1063 	return p;
1064 }
1065 
encode_attrs(struct xdr_stream * xdr,const struct iattr * iap,const struct nfs4_label * label,const umode_t * umask,const struct nfs_server * server,const uint32_t attrmask[])1066 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1067 				const struct nfs4_label *label,
1068 				const umode_t *umask,
1069 				const struct nfs_server *server,
1070 				const uint32_t attrmask[])
1071 {
1072 	struct timespec ts;
1073 	char owner_name[IDMAP_NAMESZ];
1074 	char owner_group[IDMAP_NAMESZ];
1075 	int owner_namelen = 0;
1076 	int owner_grouplen = 0;
1077 	__be32 *p;
1078 	uint32_t len = 0;
1079 	uint32_t bmval[3] = { 0 };
1080 
1081 	/*
1082 	 * We reserve enough space to write the entire attribute buffer at once.
1083 	 */
1084 	if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1085 		bmval[0] |= FATTR4_WORD0_SIZE;
1086 		len += 8;
1087 	}
1088 	if (iap->ia_valid & ATTR_MODE) {
1089 		if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1090 			bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1091 			len += 8;
1092 		} else if (attrmask[1] & FATTR4_WORD1_MODE) {
1093 			bmval[1] |= FATTR4_WORD1_MODE;
1094 			len += 4;
1095 		}
1096 	}
1097 	if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1098 		owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1099 		if (owner_namelen < 0) {
1100 			dprintk("nfs: couldn't resolve uid %d to string\n",
1101 					from_kuid(&init_user_ns, iap->ia_uid));
1102 			/* XXX */
1103 			strcpy(owner_name, "nobody");
1104 			owner_namelen = sizeof("nobody") - 1;
1105 			/* goto out; */
1106 		}
1107 		bmval[1] |= FATTR4_WORD1_OWNER;
1108 		len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1109 	}
1110 	if ((iap->ia_valid & ATTR_GID) &&
1111 	   (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1112 		owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1113 		if (owner_grouplen < 0) {
1114 			dprintk("nfs: couldn't resolve gid %d to string\n",
1115 					from_kgid(&init_user_ns, iap->ia_gid));
1116 			strcpy(owner_group, "nobody");
1117 			owner_grouplen = sizeof("nobody") - 1;
1118 			/* goto out; */
1119 		}
1120 		bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1121 		len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1122 	}
1123 	if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1124 		if (iap->ia_valid & ATTR_ATIME_SET) {
1125 			bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1126 			len += 4 + (nfstime4_maxsz << 2);
1127 		} else if (iap->ia_valid & ATTR_ATIME) {
1128 			bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1129 			len += 4;
1130 		}
1131 	}
1132 	if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1133 		if (iap->ia_valid & ATTR_MTIME_SET) {
1134 			bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1135 			len += 4 + (nfstime4_maxsz << 2);
1136 		} else if (iap->ia_valid & ATTR_MTIME) {
1137 			bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1138 			len += 4;
1139 		}
1140 	}
1141 
1142 	if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1143 		len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1144 		bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1145 	}
1146 
1147 	xdr_encode_bitmap4(xdr, bmval, ARRAY_SIZE(bmval));
1148 	xdr_stream_encode_opaque_inline(xdr, (void **)&p, len);
1149 
1150 	if (bmval[0] & FATTR4_WORD0_SIZE)
1151 		p = xdr_encode_hyper(p, iap->ia_size);
1152 	if (bmval[1] & FATTR4_WORD1_MODE)
1153 		*p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1154 	if (bmval[1] & FATTR4_WORD1_OWNER)
1155 		p = xdr_encode_opaque(p, owner_name, owner_namelen);
1156 	if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1157 		p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1158 	if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1159 		if (iap->ia_valid & ATTR_ATIME_SET) {
1160 			*p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1161 			ts = timespec64_to_timespec(iap->ia_atime);
1162 			p = xdr_encode_nfstime4(p, &ts);
1163 		} else
1164 			*p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1165 	}
1166 	if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1167 		if (iap->ia_valid & ATTR_MTIME_SET) {
1168 			*p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1169 			ts = timespec64_to_timespec(iap->ia_mtime);
1170 			p = xdr_encode_nfstime4(p, &ts);
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 
encode_access(struct xdr_stream * xdr,u32 access,struct compound_hdr * hdr)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 
encode_close(struct xdr_stream * xdr,const struct nfs_closeargs * arg,struct compound_hdr * hdr)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 
encode_commit(struct xdr_stream * xdr,const struct nfs_commitargs * args,struct compound_hdr * hdr)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 
encode_create(struct xdr_stream * xdr,const struct nfs4_create_arg * create,struct compound_hdr * hdr)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 
encode_getattr(struct xdr_stream * xdr,const __u32 * bitmap,const __u32 * mask,size_t len,struct compound_hdr * hdr)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 
encode_getfattr(struct xdr_stream * xdr,const u32 * bitmask,struct compound_hdr * hdr)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 
encode_getfattr_open(struct xdr_stream * xdr,const u32 * bitmask,const u32 * open_bitmap,struct compound_hdr * hdr)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 
encode_fsinfo(struct xdr_stream * xdr,const u32 * bitmask,struct compound_hdr * hdr)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 
encode_fs_locations(struct xdr_stream * xdr,const u32 * bitmask,struct compound_hdr * hdr)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 
encode_getfh(struct xdr_stream * xdr,struct compound_hdr * hdr)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 
encode_link(struct xdr_stream * xdr,const struct qstr * name,struct compound_hdr * hdr)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 
nfs4_lock_type(struct file_lock * fl,int block)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 
nfs4_lock_length(struct file_lock * fl)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 
encode_lockowner(struct xdr_stream * xdr,const struct nfs_lowner * lowner)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  */
encode_lock(struct xdr_stream * xdr,const struct nfs_lock_args * args,struct compound_hdr * hdr)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 
encode_lockt(struct xdr_stream * xdr,const struct nfs_lockt_args * args,struct compound_hdr * hdr)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 
encode_locku(struct xdr_stream * xdr,const struct nfs_locku_args * args,struct compound_hdr * hdr)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 
encode_release_lockowner(struct xdr_stream * xdr,const struct nfs_lowner * lowner,struct compound_hdr * hdr)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 
encode_lookup(struct xdr_stream * xdr,const struct qstr * name,struct compound_hdr * hdr)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 
encode_lookupp(struct xdr_stream * xdr,struct compound_hdr * hdr)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 
encode_share_access(struct xdr_stream * xdr,u32 share_access)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 
encode_openhdr(struct xdr_stream * xdr,const struct nfs_openargs * arg)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 
encode_createmode(struct xdr_stream * xdr,const struct nfs_openargs * arg)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 
encode_opentype(struct xdr_stream * xdr,const struct nfs_openargs * arg)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 
encode_delegation_type(struct xdr_stream * xdr,fmode_t delegation_type)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 
encode_claim_null(struct xdr_stream * xdr,const struct qstr * name)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 
encode_claim_previous(struct xdr_stream * xdr,fmode_t type)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 
encode_claim_delegate_cur(struct xdr_stream * xdr,const struct qstr * name,const nfs4_stateid * stateid)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 
encode_claim_fh(struct xdr_stream * xdr)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 
encode_claim_delegate_cur_fh(struct xdr_stream * xdr,const nfs4_stateid * stateid)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 
encode_open(struct xdr_stream * xdr,const struct nfs_openargs * arg,struct compound_hdr * hdr)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 
encode_open_confirm(struct xdr_stream * xdr,const struct nfs_open_confirmargs * arg,struct compound_hdr * hdr)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 
encode_open_downgrade(struct xdr_stream * xdr,const struct nfs_closeargs * arg,struct compound_hdr * hdr)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
encode_putfh(struct xdr_stream * xdr,const struct nfs_fh * fh,struct compound_hdr * hdr)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 
encode_putrootfh(struct xdr_stream * xdr,struct compound_hdr * hdr)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 
encode_read(struct xdr_stream * xdr,const struct nfs_pgio_args * args,struct compound_hdr * hdr)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 
encode_readdir(struct xdr_stream * xdr,const struct nfs4_readdir_arg * readdir,struct rpc_rqst * req,struct compound_hdr * hdr)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 
encode_readlink(struct xdr_stream * xdr,const struct nfs4_readlink * readlink,struct rpc_rqst * req,struct compound_hdr * hdr)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 
encode_remove(struct xdr_stream * xdr,const struct qstr * name,struct compound_hdr * hdr)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 
encode_rename(struct xdr_stream * xdr,const struct qstr * oldname,const struct qstr * newname,struct compound_hdr * hdr)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 
encode_renew(struct xdr_stream * xdr,clientid4 clid,struct compound_hdr * hdr)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
encode_restorefh(struct xdr_stream * xdr,struct compound_hdr * hdr)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
encode_setacl(struct xdr_stream * xdr,const struct nfs_setaclargs * arg,struct compound_hdr * hdr)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
encode_savefh(struct xdr_stream * xdr,struct compound_hdr * hdr)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 
encode_setattr(struct xdr_stream * xdr,const struct nfs_setattrargs * arg,const struct nfs_server * server,struct compound_hdr * hdr)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 
encode_setclientid(struct xdr_stream * xdr,const struct nfs4_setclientid * setclientid,struct compound_hdr * hdr)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 
encode_setclientid_confirm(struct xdr_stream * xdr,const struct nfs4_setclientid_res * arg,struct compound_hdr * hdr)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 
encode_write(struct xdr_stream * xdr,const struct nfs_pgio_args * args,struct compound_hdr * hdr)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 
encode_delegreturn(struct xdr_stream * xdr,const nfs4_stateid * stateid,struct compound_hdr * hdr)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 
encode_secinfo(struct xdr_stream * xdr,const struct qstr * name,struct compound_hdr * hdr)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 */
encode_bind_conn_to_session(struct xdr_stream * xdr,const struct nfs41_bind_conn_to_session_args * args,struct compound_hdr * hdr)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 
encode_op_map(struct xdr_stream * xdr,const struct nfs4_op_map * op_map)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 
encode_exchange_id(struct xdr_stream * xdr,const struct nfs41_exchange_id_args * args,struct compound_hdr * hdr)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 
encode_create_session(struct xdr_stream * xdr,const struct nfs41_create_session_args * args,struct compound_hdr * hdr)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 
encode_destroy_session(struct xdr_stream * xdr,const struct nfs4_session * session,struct compound_hdr * hdr)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 
encode_destroy_clientid(struct xdr_stream * xdr,uint64_t clientid,struct compound_hdr * hdr)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 
encode_reclaim_complete(struct xdr_stream * xdr,const struct nfs41_reclaim_complete_args * args,struct compound_hdr * hdr)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 
encode_sequence(struct xdr_stream * xdr,const struct nfs4_sequence_args * args,struct compound_hdr * hdr)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
encode_getdeviceinfo(struct xdr_stream * xdr,const struct nfs4_getdeviceinfo_args * args,struct compound_hdr * hdr)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
encode_layoutget(struct xdr_stream * xdr,const struct nfs4_layoutget_args * args,struct compound_hdr * hdr)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
encode_layoutcommit(struct xdr_stream * xdr,struct inode * inode,const struct nfs4_layoutcommit_args * args,struct compound_hdr * hdr)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
encode_layoutreturn(struct xdr_stream * xdr,const struct nfs4_layoutreturn_args * args,struct compound_hdr * hdr)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
encode_secinfo_no_name(struct xdr_stream * xdr,const struct nfs41_secinfo_no_name_args * args,struct compound_hdr * hdr)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 
encode_test_stateid(struct xdr_stream * xdr,const struct nfs41_test_stateid_args * args,struct compound_hdr * hdr)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 
encode_free_stateid(struct xdr_stream * xdr,const struct nfs41_free_stateid_args * args,struct compound_hdr * hdr)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
encode_layoutreturn(struct xdr_stream * xdr,const struct nfs4_layoutreturn_args * args,struct compound_hdr * hdr)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
encode_layoutget(struct xdr_stream * xdr,const struct nfs4_layoutget_args * args,struct compound_hdr * hdr)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 
nfs4_xdr_minorversion(const struct nfs4_sequence_args * args)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  */
nfs4_xdr_enc_access(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)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  */
nfs4_xdr_enc_lookup(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)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  */
nfs4_xdr_enc_lookupp(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)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  */
nfs4_xdr_enc_lookup_root(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)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  */
nfs4_xdr_enc_remove(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)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  */
nfs4_xdr_enc_rename(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)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  */
nfs4_xdr_enc_link(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)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  */
nfs4_xdr_enc_create(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)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  */
nfs4_xdr_enc_symlink(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)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  */
nfs4_xdr_enc_getattr(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)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  */
nfs4_xdr_enc_close(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)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  */
nfs4_xdr_enc_open(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)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 		xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2344 				 args->lg_args->layout.pages,
2345 				 0, args->lg_args->layout.pglen);
2346 	}
2347 	encode_nops(&hdr);
2348 }
2349 
2350 /*
2351  * Encode an OPEN_CONFIRM request
2352  */
nfs4_xdr_enc_open_confirm(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)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  */
nfs4_xdr_enc_open_noattr(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)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 		xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2390 				 args->lg_args->layout.pages,
2391 				 0, args->lg_args->layout.pglen);
2392 	}
2393 	encode_nops(&hdr);
2394 }
2395 
2396 /*
2397  * Encode an OPEN_DOWNGRADE request
2398  */
nfs4_xdr_enc_open_downgrade(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)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  */
nfs4_xdr_enc_lock(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)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  */
nfs4_xdr_enc_lockt(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)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  */
nfs4_xdr_enc_locku(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)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 
nfs4_xdr_enc_release_lockowner(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)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  */
nfs4_xdr_enc_readlink(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)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 	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2502 			args->pgbase, args->pglen);
2503 	encode_nops(&hdr);
2504 }
2505 
2506 /*
2507  * Encode a READDIR request
2508  */
nfs4_xdr_enc_readdir(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)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 	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2523 			 args->pgbase, args->count);
2524 	dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2525 			__func__, hdr.replen << 2, args->pages,
2526 			args->pgbase, args->count);
2527 	encode_nops(&hdr);
2528 }
2529 
2530 /*
2531  * Encode a READ request
2532  */
nfs4_xdr_enc_read(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)2533 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2534 			      const void *data)
2535 {
2536 	const struct nfs_pgio_args *args = data;
2537 	struct compound_hdr hdr = {
2538 		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2539 	};
2540 
2541 	encode_compound_hdr(xdr, req, &hdr);
2542 	encode_sequence(xdr, &args->seq_args, &hdr);
2543 	encode_putfh(xdr, args->fh, &hdr);
2544 	encode_read(xdr, args, &hdr);
2545 
2546 	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2547 			 args->pages, args->pgbase, args->count);
2548 	req->rq_rcv_buf.flags |= XDRBUF_READ;
2549 	encode_nops(&hdr);
2550 }
2551 
2552 /*
2553  * Encode an SETATTR request
2554  */
nfs4_xdr_enc_setattr(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)2555 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2556 				 const void *data)
2557 {
2558 	const struct nfs_setattrargs *args = data;
2559 	struct compound_hdr hdr = {
2560 		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2561 	};
2562 
2563 	encode_compound_hdr(xdr, req, &hdr);
2564 	encode_sequence(xdr, &args->seq_args, &hdr);
2565 	encode_putfh(xdr, args->fh, &hdr);
2566 	encode_setattr(xdr, args, args->server, &hdr);
2567 	encode_getfattr(xdr, args->bitmask, &hdr);
2568 	encode_nops(&hdr);
2569 }
2570 
2571 /*
2572  * Encode a GETACL request
2573  */
nfs4_xdr_enc_getacl(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)2574 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2575 				const void *data)
2576 {
2577 	const struct nfs_getaclargs *args = data;
2578 	struct compound_hdr hdr = {
2579 		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2580 	};
2581 	const __u32 nfs4_acl_bitmap[1] = {
2582 		[0] = FATTR4_WORD0_ACL,
2583 	};
2584 	uint32_t replen;
2585 
2586 	encode_compound_hdr(xdr, req, &hdr);
2587 	encode_sequence(xdr, &args->seq_args, &hdr);
2588 	encode_putfh(xdr, args->fh, &hdr);
2589 	replen = hdr.replen + op_decode_hdr_maxsz;
2590 	encode_getattr(xdr, nfs4_acl_bitmap, NULL,
2591 			ARRAY_SIZE(nfs4_acl_bitmap), &hdr);
2592 
2593 	xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2594 		args->acl_pages, 0, args->acl_len);
2595 
2596 	encode_nops(&hdr);
2597 }
2598 
2599 /*
2600  * Encode a WRITE request
2601  */
nfs4_xdr_enc_write(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)2602 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2603 			       const void *data)
2604 {
2605 	const struct nfs_pgio_args *args = data;
2606 	struct compound_hdr hdr = {
2607 		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2608 	};
2609 
2610 	encode_compound_hdr(xdr, req, &hdr);
2611 	encode_sequence(xdr, &args->seq_args, &hdr);
2612 	encode_putfh(xdr, args->fh, &hdr);
2613 	encode_write(xdr, args, &hdr);
2614 	req->rq_snd_buf.flags |= XDRBUF_WRITE;
2615 	if (args->bitmask)
2616 		encode_getfattr(xdr, args->bitmask, &hdr);
2617 	encode_nops(&hdr);
2618 }
2619 
2620 /*
2621  *  a COMMIT request
2622  */
nfs4_xdr_enc_commit(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)2623 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2624 				const void *data)
2625 {
2626 	const struct nfs_commitargs *args = data;
2627 	struct compound_hdr hdr = {
2628 		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2629 	};
2630 
2631 	encode_compound_hdr(xdr, req, &hdr);
2632 	encode_sequence(xdr, &args->seq_args, &hdr);
2633 	encode_putfh(xdr, args->fh, &hdr);
2634 	encode_commit(xdr, args, &hdr);
2635 	encode_nops(&hdr);
2636 }
2637 
2638 /*
2639  * FSINFO request
2640  */
nfs4_xdr_enc_fsinfo(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)2641 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2642 				const void *data)
2643 {
2644 	const struct nfs4_fsinfo_arg *args = data;
2645 	struct compound_hdr hdr = {
2646 		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2647 	};
2648 
2649 	encode_compound_hdr(xdr, req, &hdr);
2650 	encode_sequence(xdr, &args->seq_args, &hdr);
2651 	encode_putfh(xdr, args->fh, &hdr);
2652 	encode_fsinfo(xdr, args->bitmask, &hdr);
2653 	encode_nops(&hdr);
2654 }
2655 
2656 /*
2657  * a PATHCONF request
2658  */
nfs4_xdr_enc_pathconf(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)2659 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2660 				  const void *data)
2661 {
2662 	const struct nfs4_pathconf_arg *args = data;
2663 	struct compound_hdr hdr = {
2664 		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2665 	};
2666 
2667 	encode_compound_hdr(xdr, req, &hdr);
2668 	encode_sequence(xdr, &args->seq_args, &hdr);
2669 	encode_putfh(xdr, args->fh, &hdr);
2670 	encode_getattr(xdr, nfs4_pathconf_bitmap, args->bitmask,
2671 			ARRAY_SIZE(nfs4_pathconf_bitmap), &hdr);
2672 	encode_nops(&hdr);
2673 }
2674 
2675 /*
2676  * a STATFS request
2677  */
nfs4_xdr_enc_statfs(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)2678 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2679 				const void *data)
2680 {
2681 	const struct nfs4_statfs_arg *args = data;
2682 	struct compound_hdr hdr = {
2683 		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2684 	};
2685 
2686 	encode_compound_hdr(xdr, req, &hdr);
2687 	encode_sequence(xdr, &args->seq_args, &hdr);
2688 	encode_putfh(xdr, args->fh, &hdr);
2689 	encode_getattr(xdr, nfs4_statfs_bitmap, args->bitmask,
2690 			ARRAY_SIZE(nfs4_statfs_bitmap), &hdr);
2691 	encode_nops(&hdr);
2692 }
2693 
2694 /*
2695  * GETATTR_BITMAP request
2696  */
nfs4_xdr_enc_server_caps(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)2697 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2698 				     struct xdr_stream *xdr,
2699 				     const void *data)
2700 {
2701 	const struct nfs4_server_caps_arg *args = data;
2702 	const u32 *bitmask = args->bitmask;
2703 	struct compound_hdr hdr = {
2704 		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2705 	};
2706 
2707 	encode_compound_hdr(xdr, req, &hdr);
2708 	encode_sequence(xdr, &args->seq_args, &hdr);
2709 	encode_putfh(xdr, args->fhandle, &hdr);
2710 	encode_getattr(xdr, bitmask, NULL, 3, &hdr);
2711 	encode_nops(&hdr);
2712 }
2713 
2714 /*
2715  * a RENEW request
2716  */
nfs4_xdr_enc_renew(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)2717 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2718 			       const void *data)
2719 
2720 {
2721 	const struct nfs_client *clp = data;
2722 	struct compound_hdr hdr = {
2723 		.nops	= 0,
2724 	};
2725 
2726 	encode_compound_hdr(xdr, req, &hdr);
2727 	encode_renew(xdr, clp->cl_clientid, &hdr);
2728 	encode_nops(&hdr);
2729 }
2730 
2731 /*
2732  * a SETCLIENTID request
2733  */
nfs4_xdr_enc_setclientid(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)2734 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2735 				     struct xdr_stream *xdr,
2736 				     const void *data)
2737 {
2738 	const struct nfs4_setclientid *sc = data;
2739 	struct compound_hdr hdr = {
2740 		.nops	= 0,
2741 	};
2742 
2743 	encode_compound_hdr(xdr, req, &hdr);
2744 	encode_setclientid(xdr, sc, &hdr);
2745 	encode_nops(&hdr);
2746 }
2747 
2748 /*
2749  * a SETCLIENTID_CONFIRM request
2750  */
nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)2751 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2752 					     struct xdr_stream *xdr,
2753 					     const void *data)
2754 {
2755 	const struct nfs4_setclientid_res *arg = data;
2756 	struct compound_hdr hdr = {
2757 		.nops	= 0,
2758 	};
2759 
2760 	encode_compound_hdr(xdr, req, &hdr);
2761 	encode_setclientid_confirm(xdr, arg, &hdr);
2762 	encode_nops(&hdr);
2763 }
2764 
2765 /*
2766  * DELEGRETURN request
2767  */
nfs4_xdr_enc_delegreturn(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)2768 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2769 				     struct xdr_stream *xdr,
2770 				     const void *data)
2771 {
2772 	const struct nfs4_delegreturnargs *args = data;
2773 	struct compound_hdr hdr = {
2774 		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2775 	};
2776 
2777 	encode_compound_hdr(xdr, req, &hdr);
2778 	encode_sequence(xdr, &args->seq_args, &hdr);
2779 	encode_putfh(xdr, args->fhandle, &hdr);
2780 	if (args->lr_args)
2781 		encode_layoutreturn(xdr, args->lr_args, &hdr);
2782 	if (args->bitmask)
2783 		encode_getfattr(xdr, args->bitmask, &hdr);
2784 	encode_delegreturn(xdr, args->stateid, &hdr);
2785 	encode_nops(&hdr);
2786 }
2787 
2788 /*
2789  * Encode FS_LOCATIONS request
2790  */
nfs4_xdr_enc_fs_locations(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)2791 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2792 				      struct xdr_stream *xdr,
2793 				      const void *data)
2794 {
2795 	const struct nfs4_fs_locations_arg *args = data;
2796 	struct compound_hdr hdr = {
2797 		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2798 	};
2799 	uint32_t replen;
2800 
2801 	encode_compound_hdr(xdr, req, &hdr);
2802 	encode_sequence(xdr, &args->seq_args, &hdr);
2803 	if (args->migration) {
2804 		encode_putfh(xdr, args->fh, &hdr);
2805 		replen = hdr.replen;
2806 		encode_fs_locations(xdr, args->bitmask, &hdr);
2807 		if (args->renew)
2808 			encode_renew(xdr, args->clientid, &hdr);
2809 	} else {
2810 		encode_putfh(xdr, args->dir_fh, &hdr);
2811 		encode_lookup(xdr, args->name, &hdr);
2812 		replen = hdr.replen;
2813 		encode_fs_locations(xdr, args->bitmask, &hdr);
2814 	}
2815 
2816 	/* Set up reply kvec to capture returned fs_locations array. */
2817 	xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2818 			 (struct page **)&args->page, 0, PAGE_SIZE);
2819 	encode_nops(&hdr);
2820 }
2821 
2822 /*
2823  * Encode SECINFO request
2824  */
nfs4_xdr_enc_secinfo(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)2825 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2826 				struct xdr_stream *xdr,
2827 				const void *data)
2828 {
2829 	const struct nfs4_secinfo_arg *args = data;
2830 	struct compound_hdr hdr = {
2831 		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2832 	};
2833 
2834 	encode_compound_hdr(xdr, req, &hdr);
2835 	encode_sequence(xdr, &args->seq_args, &hdr);
2836 	encode_putfh(xdr, args->dir_fh, &hdr);
2837 	encode_secinfo(xdr, args->name, &hdr);
2838 	encode_nops(&hdr);
2839 }
2840 
2841 /*
2842  * Encode FSID_PRESENT request
2843  */
nfs4_xdr_enc_fsid_present(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)2844 static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2845 				      struct xdr_stream *xdr,
2846 				      const void *data)
2847 {
2848 	const struct nfs4_fsid_present_arg *args = data;
2849 	struct compound_hdr hdr = {
2850 		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
2851 	};
2852 
2853 	encode_compound_hdr(xdr, req, &hdr);
2854 	encode_sequence(xdr, &args->seq_args, &hdr);
2855 	encode_putfh(xdr, args->fh, &hdr);
2856 	encode_getfh(xdr, &hdr);
2857 	if (args->renew)
2858 		encode_renew(xdr, args->clientid, &hdr);
2859 	encode_nops(&hdr);
2860 }
2861 
2862 #if defined(CONFIG_NFS_V4_1)
2863 /*
2864  * BIND_CONN_TO_SESSION request
2865  */
nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)2866 static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2867 				struct xdr_stream *xdr,
2868 				const void *data)
2869 {
2870 	const struct nfs41_bind_conn_to_session_args *args = data;
2871 	struct compound_hdr hdr = {
2872 		.minorversion = args->client->cl_mvops->minor_version,
2873 	};
2874 
2875 	encode_compound_hdr(xdr, req, &hdr);
2876 	encode_bind_conn_to_session(xdr, args, &hdr);
2877 	encode_nops(&hdr);
2878 }
2879 
2880 /*
2881  * EXCHANGE_ID request
2882  */
nfs4_xdr_enc_exchange_id(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)2883 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2884 				     struct xdr_stream *xdr,
2885 				     const void *data)
2886 {
2887 	const struct nfs41_exchange_id_args *args = data;
2888 	struct compound_hdr hdr = {
2889 		.minorversion = args->client->cl_mvops->minor_version,
2890 	};
2891 
2892 	encode_compound_hdr(xdr, req, &hdr);
2893 	encode_exchange_id(xdr, args, &hdr);
2894 	encode_nops(&hdr);
2895 }
2896 
2897 /*
2898  * a CREATE_SESSION request
2899  */
nfs4_xdr_enc_create_session(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)2900 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2901 					struct xdr_stream *xdr,
2902 					const void *data)
2903 {
2904 	const struct nfs41_create_session_args *args = data;
2905 	struct compound_hdr hdr = {
2906 		.minorversion = args->client->cl_mvops->minor_version,
2907 	};
2908 
2909 	encode_compound_hdr(xdr, req, &hdr);
2910 	encode_create_session(xdr, args, &hdr);
2911 	encode_nops(&hdr);
2912 }
2913 
2914 /*
2915  * a DESTROY_SESSION request
2916  */
nfs4_xdr_enc_destroy_session(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)2917 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2918 					 struct xdr_stream *xdr,
2919 					 const void *data)
2920 {
2921 	const struct nfs4_session *session = data;
2922 	struct compound_hdr hdr = {
2923 		.minorversion = session->clp->cl_mvops->minor_version,
2924 	};
2925 
2926 	encode_compound_hdr(xdr, req, &hdr);
2927 	encode_destroy_session(xdr, session, &hdr);
2928 	encode_nops(&hdr);
2929 }
2930 
2931 /*
2932  * a DESTROY_CLIENTID request
2933  */
nfs4_xdr_enc_destroy_clientid(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)2934 static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2935 					 struct xdr_stream *xdr,
2936 					 const void *data)
2937 {
2938 	const struct nfs_client *clp = data;
2939 	struct compound_hdr hdr = {
2940 		.minorversion = clp->cl_mvops->minor_version,
2941 	};
2942 
2943 	encode_compound_hdr(xdr, req, &hdr);
2944 	encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2945 	encode_nops(&hdr);
2946 }
2947 
2948 /*
2949  * a SEQUENCE request
2950  */
nfs4_xdr_enc_sequence(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)2951 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2952 				  const void *data)
2953 {
2954 	const struct nfs4_sequence_args *args = data;
2955 	struct compound_hdr hdr = {
2956 		.minorversion = nfs4_xdr_minorversion(args),
2957 	};
2958 
2959 	encode_compound_hdr(xdr, req, &hdr);
2960 	encode_sequence(xdr, args, &hdr);
2961 	encode_nops(&hdr);
2962 }
2963 
2964 /*
2965  * a GET_LEASE_TIME request
2966  */
nfs4_xdr_enc_get_lease_time(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)2967 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2968 					struct xdr_stream *xdr,
2969 					const void *data)
2970 {
2971 	const struct nfs4_get_lease_time_args *args = data;
2972 	struct compound_hdr hdr = {
2973 		.minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2974 	};
2975 	const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2976 
2977 	encode_compound_hdr(xdr, req, &hdr);
2978 	encode_sequence(xdr, &args->la_seq_args, &hdr);
2979 	encode_putrootfh(xdr, &hdr);
2980 	encode_fsinfo(xdr, lease_bitmap, &hdr);
2981 	encode_nops(&hdr);
2982 }
2983 
2984 /*
2985  * a RECLAIM_COMPLETE request
2986  */
nfs4_xdr_enc_reclaim_complete(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)2987 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2988 					  struct xdr_stream *xdr,
2989 					  const void *data)
2990 {
2991 	const struct nfs41_reclaim_complete_args *args = data;
2992 	struct compound_hdr hdr = {
2993 		.minorversion = nfs4_xdr_minorversion(&args->seq_args)
2994 	};
2995 
2996 	encode_compound_hdr(xdr, req, &hdr);
2997 	encode_sequence(xdr, &args->seq_args, &hdr);
2998 	encode_reclaim_complete(xdr, args, &hdr);
2999 	encode_nops(&hdr);
3000 }
3001 
3002 /*
3003  * Encode GETDEVICEINFO request
3004  */
nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)3005 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
3006 				       struct xdr_stream *xdr,
3007 				       const void *data)
3008 {
3009 	const struct nfs4_getdeviceinfo_args *args = data;
3010 	struct compound_hdr hdr = {
3011 		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
3012 	};
3013 
3014 	encode_compound_hdr(xdr, req, &hdr);
3015 	encode_sequence(xdr, &args->seq_args, &hdr);
3016 	encode_getdeviceinfo(xdr, args, &hdr);
3017 
3018 	/* set up reply kvec. Subtract notification bitmap max size (2)
3019 	 * so that notification bitmap is put in xdr_buf tail */
3020 	xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
3021 			 args->pdev->pages, args->pdev->pgbase,
3022 			 args->pdev->pglen);
3023 
3024 	encode_nops(&hdr);
3025 }
3026 
3027 /*
3028  *  Encode LAYOUTGET request
3029  */
nfs4_xdr_enc_layoutget(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)3030 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
3031 				   struct xdr_stream *xdr,
3032 				   const void *data)
3033 {
3034 	const struct nfs4_layoutget_args *args = data;
3035 	struct compound_hdr hdr = {
3036 		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
3037 	};
3038 
3039 	encode_compound_hdr(xdr, req, &hdr);
3040 	encode_sequence(xdr, &args->seq_args, &hdr);
3041 	encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3042 	encode_layoutget(xdr, args, &hdr);
3043 
3044 	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
3045 	    args->layout.pages, 0, args->layout.pglen);
3046 
3047 	encode_nops(&hdr);
3048 }
3049 
3050 /*
3051  *  Encode LAYOUTCOMMIT request
3052  */
nfs4_xdr_enc_layoutcommit(struct rpc_rqst * req,struct xdr_stream * xdr,const void * priv)3053 static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3054 				      struct xdr_stream *xdr,
3055 				      const void *priv)
3056 {
3057 	const struct nfs4_layoutcommit_args *args = priv;
3058 	struct nfs4_layoutcommit_data *data =
3059 		container_of(args, struct nfs4_layoutcommit_data, args);
3060 	struct compound_hdr hdr = {
3061 		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
3062 	};
3063 
3064 	encode_compound_hdr(xdr, req, &hdr);
3065 	encode_sequence(xdr, &args->seq_args, &hdr);
3066 	encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3067 	encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3068 	encode_getfattr(xdr, args->bitmask, &hdr);
3069 	encode_nops(&hdr);
3070 }
3071 
3072 /*
3073  * Encode LAYOUTRETURN request
3074  */
nfs4_xdr_enc_layoutreturn(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)3075 static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3076 				      struct xdr_stream *xdr,
3077 				      const void *data)
3078 {
3079 	const struct nfs4_layoutreturn_args *args = data;
3080 	struct compound_hdr hdr = {
3081 		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
3082 	};
3083 
3084 	encode_compound_hdr(xdr, req, &hdr);
3085 	encode_sequence(xdr, &args->seq_args, &hdr);
3086 	encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3087 	encode_layoutreturn(xdr, args, &hdr);
3088 	encode_nops(&hdr);
3089 }
3090 
3091 /*
3092  * Encode SECINFO_NO_NAME request
3093  */
nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)3094 static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3095 					struct xdr_stream *xdr,
3096 					const void *data)
3097 {
3098 	const struct nfs41_secinfo_no_name_args *args = data;
3099 	struct compound_hdr hdr = {
3100 		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
3101 	};
3102 
3103 	encode_compound_hdr(xdr, req, &hdr);
3104 	encode_sequence(xdr, &args->seq_args, &hdr);
3105 	encode_putrootfh(xdr, &hdr);
3106 	encode_secinfo_no_name(xdr, args, &hdr);
3107 	encode_nops(&hdr);
3108 }
3109 
3110 /*
3111  *  Encode TEST_STATEID request
3112  */
nfs4_xdr_enc_test_stateid(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)3113 static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3114 				      struct xdr_stream *xdr,
3115 				      const void *data)
3116 {
3117 	const struct nfs41_test_stateid_args *args = data;
3118 	struct compound_hdr hdr = {
3119 		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
3120 	};
3121 
3122 	encode_compound_hdr(xdr, req, &hdr);
3123 	encode_sequence(xdr, &args->seq_args, &hdr);
3124 	encode_test_stateid(xdr, args, &hdr);
3125 	encode_nops(&hdr);
3126 }
3127 
3128 /*
3129  *  Encode FREE_STATEID request
3130  */
nfs4_xdr_enc_free_stateid(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)3131 static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3132 				     struct xdr_stream *xdr,
3133 				     const void *data)
3134 {
3135 	const struct nfs41_free_stateid_args *args = data;
3136 	struct compound_hdr hdr = {
3137 		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
3138 	};
3139 
3140 	encode_compound_hdr(xdr, req, &hdr);
3141 	encode_sequence(xdr, &args->seq_args, &hdr);
3142 	encode_free_stateid(xdr, args, &hdr);
3143 	encode_nops(&hdr);
3144 }
3145 #endif /* CONFIG_NFS_V4_1 */
3146 
print_overflow_msg(const char * func,const struct xdr_stream * xdr)3147 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3148 {
3149 	dprintk("nfs: %s: prematurely hit end of receive buffer. "
3150 		"Remaining buffer length is %tu words.\n",
3151 		func, xdr->end - xdr->p);
3152 }
3153 
decode_opaque_inline(struct xdr_stream * xdr,unsigned int * len,char ** string)3154 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3155 {
3156 	ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3157 			NFS4_OPAQUE_LIMIT);
3158 	if (unlikely(ret < 0)) {
3159 		if (ret == -EBADMSG)
3160 			print_overflow_msg(__func__, xdr);
3161 		return -EIO;
3162 	}
3163 	*len = ret;
3164 	return 0;
3165 }
3166 
decode_compound_hdr(struct xdr_stream * xdr,struct compound_hdr * hdr)3167 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3168 {
3169 	__be32 *p;
3170 
3171 	p = xdr_inline_decode(xdr, 8);
3172 	if (unlikely(!p))
3173 		goto out_overflow;
3174 	hdr->status = be32_to_cpup(p++);
3175 	hdr->taglen = be32_to_cpup(p);
3176 
3177 	p = xdr_inline_decode(xdr, hdr->taglen + 4);
3178 	if (unlikely(!p))
3179 		goto out_overflow;
3180 	hdr->tag = (char *)p;
3181 	p += XDR_QUADLEN(hdr->taglen);
3182 	hdr->nops = be32_to_cpup(p);
3183 	if (unlikely(hdr->nops < 1))
3184 		return nfs4_stat_to_errno(hdr->status);
3185 	return 0;
3186 out_overflow:
3187 	print_overflow_msg(__func__, xdr);
3188 	return -EIO;
3189 }
3190 
__decode_op_hdr(struct xdr_stream * xdr,enum nfs_opnum4 expected,int * nfs_retval)3191 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3192 		int *nfs_retval)
3193 {
3194 	__be32 *p;
3195 	uint32_t opnum;
3196 	int32_t nfserr;
3197 
3198 	p = xdr_inline_decode(xdr, 8);
3199 	if (unlikely(!p))
3200 		goto out_overflow;
3201 	opnum = be32_to_cpup(p++);
3202 	if (unlikely(opnum != expected))
3203 		goto out_bad_operation;
3204 	nfserr = be32_to_cpup(p);
3205 	if (nfserr == NFS_OK)
3206 		*nfs_retval = 0;
3207 	else
3208 		*nfs_retval = nfs4_stat_to_errno(nfserr);
3209 	return true;
3210 out_bad_operation:
3211 	dprintk("nfs: Server returned operation"
3212 		" %d but we issued a request for %d\n",
3213 			opnum, expected);
3214 	*nfs_retval = -EREMOTEIO;
3215 	return false;
3216 out_overflow:
3217 	print_overflow_msg(__func__, xdr);
3218 	*nfs_retval = -EIO;
3219 	return false;
3220 }
3221 
decode_op_hdr(struct xdr_stream * xdr,enum nfs_opnum4 expected)3222 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3223 {
3224 	int retval;
3225 
3226 	__decode_op_hdr(xdr, expected, &retval);
3227 	return retval;
3228 }
3229 
3230 /* Dummy routine */
decode_ace(struct xdr_stream * xdr,void * ace)3231 static int decode_ace(struct xdr_stream *xdr, void *ace)
3232 {
3233 	__be32 *p;
3234 	unsigned int strlen;
3235 	char *str;
3236 
3237 	p = xdr_inline_decode(xdr, 12);
3238 	if (likely(p))
3239 		return decode_opaque_inline(xdr, &strlen, &str);
3240 	print_overflow_msg(__func__, xdr);
3241 	return -EIO;
3242 }
3243 
3244 static ssize_t
decode_bitmap4(struct xdr_stream * xdr,uint32_t * bitmap,size_t sz)3245 decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
3246 {
3247 	ssize_t ret;
3248 
3249 	ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
3250 	if (likely(ret >= 0))
3251 		return ret;
3252 	if (ret == -EMSGSIZE)
3253 		return sz;
3254 	print_overflow_msg(__func__, xdr);
3255 	return -EIO;
3256 }
3257 
decode_attr_bitmap(struct xdr_stream * xdr,uint32_t * bitmap)3258 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3259 {
3260 	ssize_t ret;
3261 	ret = decode_bitmap4(xdr, bitmap, 3);
3262 	return ret < 0 ? ret : 0;
3263 }
3264 
decode_attr_length(struct xdr_stream * xdr,uint32_t * attrlen,unsigned int * savep)3265 static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3266 {
3267 	__be32 *p;
3268 
3269 	p = xdr_inline_decode(xdr, 4);
3270 	if (unlikely(!p))
3271 		goto out_overflow;
3272 	*attrlen = be32_to_cpup(p);
3273 	*savep = xdr_stream_pos(xdr);
3274 	return 0;
3275 out_overflow:
3276 	print_overflow_msg(__func__, xdr);
3277 	return -EIO;
3278 }
3279 
decode_attr_supported(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * bitmask)3280 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3281 {
3282 	if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3283 		int ret;
3284 		ret = decode_attr_bitmap(xdr, bitmask);
3285 		if (unlikely(ret < 0))
3286 			return ret;
3287 		bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3288 	} else
3289 		bitmask[0] = bitmask[1] = bitmask[2] = 0;
3290 	dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3291 		bitmask[0], bitmask[1], bitmask[2]);
3292 	return 0;
3293 }
3294 
decode_attr_type(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * type)3295 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3296 {
3297 	__be32 *p;
3298 	int ret = 0;
3299 
3300 	*type = 0;
3301 	if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3302 		return -EIO;
3303 	if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3304 		p = xdr_inline_decode(xdr, 4);
3305 		if (unlikely(!p))
3306 			goto out_overflow;
3307 		*type = be32_to_cpup(p);
3308 		if (*type < NF4REG || *type > NF4NAMEDATTR) {
3309 			dprintk("%s: bad type %d\n", __func__, *type);
3310 			return -EIO;
3311 		}
3312 		bitmap[0] &= ~FATTR4_WORD0_TYPE;
3313 		ret = NFS_ATTR_FATTR_TYPE;
3314 	}
3315 	dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3316 	return ret;
3317 out_overflow:
3318 	print_overflow_msg(__func__, xdr);
3319 	return -EIO;
3320 }
3321 
decode_attr_fh_expire_type(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * type)3322 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3323 				      uint32_t *bitmap, uint32_t *type)
3324 {
3325 	__be32 *p;
3326 
3327 	*type = 0;
3328 	if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3329 		return -EIO;
3330 	if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3331 		p = xdr_inline_decode(xdr, 4);
3332 		if (unlikely(!p))
3333 			goto out_overflow;
3334 		*type = be32_to_cpup(p);
3335 		bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3336 	}
3337 	dprintk("%s: expire type=0x%x\n", __func__, *type);
3338 	return 0;
3339 out_overflow:
3340 	print_overflow_msg(__func__, xdr);
3341 	return -EIO;
3342 }
3343 
decode_attr_change(struct xdr_stream * xdr,uint32_t * bitmap,uint64_t * change)3344 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3345 {
3346 	__be32 *p;
3347 	int ret = 0;
3348 
3349 	*change = 0;
3350 	if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3351 		return -EIO;
3352 	if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3353 		p = xdr_inline_decode(xdr, 8);
3354 		if (unlikely(!p))
3355 			goto out_overflow;
3356 		xdr_decode_hyper(p, change);
3357 		bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3358 		ret = NFS_ATTR_FATTR_CHANGE;
3359 	}
3360 	dprintk("%s: change attribute=%Lu\n", __func__,
3361 			(unsigned long long)*change);
3362 	return ret;
3363 out_overflow:
3364 	print_overflow_msg(__func__, xdr);
3365 	return -EIO;
3366 }
3367 
decode_attr_size(struct xdr_stream * xdr,uint32_t * bitmap,uint64_t * size)3368 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3369 {
3370 	__be32 *p;
3371 	int ret = 0;
3372 
3373 	*size = 0;
3374 	if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3375 		return -EIO;
3376 	if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3377 		p = xdr_inline_decode(xdr, 8);
3378 		if (unlikely(!p))
3379 			goto out_overflow;
3380 		xdr_decode_hyper(p, size);
3381 		bitmap[0] &= ~FATTR4_WORD0_SIZE;
3382 		ret = NFS_ATTR_FATTR_SIZE;
3383 	}
3384 	dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3385 	return ret;
3386 out_overflow:
3387 	print_overflow_msg(__func__, xdr);
3388 	return -EIO;
3389 }
3390 
decode_attr_link_support(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * res)3391 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3392 {
3393 	__be32 *p;
3394 
3395 	*res = 0;
3396 	if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3397 		return -EIO;
3398 	if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3399 		p = xdr_inline_decode(xdr, 4);
3400 		if (unlikely(!p))
3401 			goto out_overflow;
3402 		*res = be32_to_cpup(p);
3403 		bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3404 	}
3405 	dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3406 	return 0;
3407 out_overflow:
3408 	print_overflow_msg(__func__, xdr);
3409 	return -EIO;
3410 }
3411 
decode_attr_symlink_support(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * res)3412 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3413 {
3414 	__be32 *p;
3415 
3416 	*res = 0;
3417 	if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3418 		return -EIO;
3419 	if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3420 		p = xdr_inline_decode(xdr, 4);
3421 		if (unlikely(!p))
3422 			goto out_overflow;
3423 		*res = be32_to_cpup(p);
3424 		bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3425 	}
3426 	dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3427 	return 0;
3428 out_overflow:
3429 	print_overflow_msg(__func__, xdr);
3430 	return -EIO;
3431 }
3432 
decode_attr_fsid(struct xdr_stream * xdr,uint32_t * bitmap,struct nfs_fsid * fsid)3433 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3434 {
3435 	__be32 *p;
3436 	int ret = 0;
3437 
3438 	fsid->major = 0;
3439 	fsid->minor = 0;
3440 	if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3441 		return -EIO;
3442 	if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3443 		p = xdr_inline_decode(xdr, 16);
3444 		if (unlikely(!p))
3445 			goto out_overflow;
3446 		p = xdr_decode_hyper(p, &fsid->major);
3447 		xdr_decode_hyper(p, &fsid->minor);
3448 		bitmap[0] &= ~FATTR4_WORD0_FSID;
3449 		ret = NFS_ATTR_FATTR_FSID;
3450 	}
3451 	dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3452 			(unsigned long long)fsid->major,
3453 			(unsigned long long)fsid->minor);
3454 	return ret;
3455 out_overflow:
3456 	print_overflow_msg(__func__, xdr);
3457 	return -EIO;
3458 }
3459 
decode_attr_lease_time(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * res)3460 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3461 {
3462 	__be32 *p;
3463 
3464 	*res = 60;
3465 	if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3466 		return -EIO;
3467 	if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3468 		p = xdr_inline_decode(xdr, 4);
3469 		if (unlikely(!p))
3470 			goto out_overflow;
3471 		*res = be32_to_cpup(p);
3472 		bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3473 	}
3474 	dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3475 	return 0;
3476 out_overflow:
3477 	print_overflow_msg(__func__, xdr);
3478 	return -EIO;
3479 }
3480 
decode_attr_error(struct xdr_stream * xdr,uint32_t * bitmap,int32_t * res)3481 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3482 {
3483 	__be32 *p;
3484 
3485 	if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3486 		return -EIO;
3487 	if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3488 		p = xdr_inline_decode(xdr, 4);
3489 		if (unlikely(!p))
3490 			goto out_overflow;
3491 		bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3492 		*res = -be32_to_cpup(p);
3493 	}
3494 	return 0;
3495 out_overflow:
3496 	print_overflow_msg(__func__, xdr);
3497 	return -EIO;
3498 }
3499 
decode_attr_exclcreat_supported(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * bitmask)3500 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3501 				 uint32_t *bitmap, uint32_t *bitmask)
3502 {
3503 	if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3504 		int ret;
3505 		ret = decode_attr_bitmap(xdr, bitmask);
3506 		if (unlikely(ret < 0))
3507 			return ret;
3508 		bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3509 	} else
3510 		bitmask[0] = bitmask[1] = bitmask[2] = 0;
3511 	dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3512 		bitmask[0], bitmask[1], bitmask[2]);
3513 	return 0;
3514 }
3515 
decode_attr_filehandle(struct xdr_stream * xdr,uint32_t * bitmap,struct nfs_fh * fh)3516 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3517 {
3518 	__be32 *p;
3519 	int len;
3520 
3521 	if (fh != NULL)
3522 		memset(fh, 0, sizeof(*fh));
3523 
3524 	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3525 		return -EIO;
3526 	if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3527 		p = xdr_inline_decode(xdr, 4);
3528 		if (unlikely(!p))
3529 			goto out_overflow;
3530 		len = be32_to_cpup(p);
3531 		if (len > NFS4_FHSIZE)
3532 			return -EIO;
3533 		p = xdr_inline_decode(xdr, len);
3534 		if (unlikely(!p))
3535 			goto out_overflow;
3536 		if (fh != NULL) {
3537 			memcpy(fh->data, p, len);
3538 			fh->size = len;
3539 		}
3540 		bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3541 	}
3542 	return 0;
3543 out_overflow:
3544 	print_overflow_msg(__func__, xdr);
3545 	return -EIO;
3546 }
3547 
decode_attr_aclsupport(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * res)3548 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3549 {
3550 	__be32 *p;
3551 
3552 	*res = 0;
3553 	if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3554 		return -EIO;
3555 	if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3556 		p = xdr_inline_decode(xdr, 4);
3557 		if (unlikely(!p))
3558 			goto out_overflow;
3559 		*res = be32_to_cpup(p);
3560 		bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3561 	}
3562 	dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3563 	return 0;
3564 out_overflow:
3565 	print_overflow_msg(__func__, xdr);
3566 	return -EIO;
3567 }
3568 
decode_attr_fileid(struct xdr_stream * xdr,uint32_t * bitmap,uint64_t * fileid)3569 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3570 {
3571 	__be32 *p;
3572 	int ret = 0;
3573 
3574 	*fileid = 0;
3575 	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3576 		return -EIO;
3577 	if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3578 		p = xdr_inline_decode(xdr, 8);
3579 		if (unlikely(!p))
3580 			goto out_overflow;
3581 		xdr_decode_hyper(p, fileid);
3582 		bitmap[0] &= ~FATTR4_WORD0_FILEID;
3583 		ret = NFS_ATTR_FATTR_FILEID;
3584 	}
3585 	dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3586 	return ret;
3587 out_overflow:
3588 	print_overflow_msg(__func__, xdr);
3589 	return -EIO;
3590 }
3591 
decode_attr_mounted_on_fileid(struct xdr_stream * xdr,uint32_t * bitmap,uint64_t * fileid)3592 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3593 {
3594 	__be32 *p;
3595 	int ret = 0;
3596 
3597 	*fileid = 0;
3598 	if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3599 		return -EIO;
3600 	if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3601 		p = xdr_inline_decode(xdr, 8);
3602 		if (unlikely(!p))
3603 			goto out_overflow;
3604 		xdr_decode_hyper(p, fileid);
3605 		bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3606 		ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3607 	}
3608 	dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3609 	return ret;
3610 out_overflow:
3611 	print_overflow_msg(__func__, xdr);
3612 	return -EIO;
3613 }
3614 
decode_attr_files_avail(struct xdr_stream * xdr,uint32_t * bitmap,uint64_t * res)3615 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3616 {
3617 	__be32 *p;
3618 	int status = 0;
3619 
3620 	*res = 0;
3621 	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3622 		return -EIO;
3623 	if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3624 		p = xdr_inline_decode(xdr, 8);
3625 		if (unlikely(!p))
3626 			goto out_overflow;
3627 		xdr_decode_hyper(p, res);
3628 		bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3629 	}
3630 	dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3631 	return status;
3632 out_overflow:
3633 	print_overflow_msg(__func__, xdr);
3634 	return -EIO;
3635 }
3636 
decode_attr_files_free(struct xdr_stream * xdr,uint32_t * bitmap,uint64_t * res)3637 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3638 {
3639 	__be32 *p;
3640 	int status = 0;
3641 
3642 	*res = 0;
3643 	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3644 		return -EIO;
3645 	if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3646 		p = xdr_inline_decode(xdr, 8);
3647 		if (unlikely(!p))
3648 			goto out_overflow;
3649 		xdr_decode_hyper(p, res);
3650 		bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3651 	}
3652 	dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3653 	return status;
3654 out_overflow:
3655 	print_overflow_msg(__func__, xdr);
3656 	return -EIO;
3657 }
3658 
decode_attr_files_total(struct xdr_stream * xdr,uint32_t * bitmap,uint64_t * res)3659 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3660 {
3661 	__be32 *p;
3662 	int status = 0;
3663 
3664 	*res = 0;
3665 	if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3666 		return -EIO;
3667 	if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3668 		p = xdr_inline_decode(xdr, 8);
3669 		if (unlikely(!p))
3670 			goto out_overflow;
3671 		xdr_decode_hyper(p, res);
3672 		bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3673 	}
3674 	dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3675 	return status;
3676 out_overflow:
3677 	print_overflow_msg(__func__, xdr);
3678 	return -EIO;
3679 }
3680 
decode_pathname(struct xdr_stream * xdr,struct nfs4_pathname * path)3681 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3682 {
3683 	u32 n;
3684 	__be32 *p;
3685 	int status = 0;
3686 
3687 	p = xdr_inline_decode(xdr, 4);
3688 	if (unlikely(!p))
3689 		goto out_overflow;
3690 	n = be32_to_cpup(p);
3691 	if (n == 0)
3692 		goto root_path;
3693 	dprintk("pathname4: ");
3694 	if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3695 		dprintk("cannot parse %d components in path\n", n);
3696 		goto out_eio;
3697 	}
3698 	for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3699 		struct nfs4_string *component = &path->components[path->ncomponents];
3700 		status = decode_opaque_inline(xdr, &component->len, &component->data);
3701 		if (unlikely(status != 0))
3702 			goto out_eio;
3703 		ifdebug (XDR)
3704 			pr_cont("%s%.*s ",
3705 				(path->ncomponents != n ? "/ " : ""),
3706 				component->len, component->data);
3707 	}
3708 out:
3709 	return status;
3710 root_path:
3711 /* a root pathname is sent as a zero component4 */
3712 	path->ncomponents = 1;
3713 	path->components[0].len=0;
3714 	path->components[0].data=NULL;
3715 	dprintk("pathname4: /\n");
3716 	goto out;
3717 out_eio:
3718 	dprintk(" status %d", status);
3719 	status = -EIO;
3720 	goto out;
3721 out_overflow:
3722 	print_overflow_msg(__func__, xdr);
3723 	return -EIO;
3724 }
3725 
decode_attr_fs_locations(struct xdr_stream * xdr,uint32_t * bitmap,struct nfs4_fs_locations * res)3726 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3727 {
3728 	int n;
3729 	__be32 *p;
3730 	int status = -EIO;
3731 
3732 	if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3733 		goto out;
3734 	status = 0;
3735 	if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3736 		goto out;
3737 	bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3738 	status = -EIO;
3739 	/* Ignore borken servers that return unrequested attrs */
3740 	if (unlikely(res == NULL))
3741 		goto out;
3742 	dprintk("%s: fsroot:\n", __func__);
3743 	status = decode_pathname(xdr, &res->fs_path);
3744 	if (unlikely(status != 0))
3745 		goto out;
3746 	p = xdr_inline_decode(xdr, 4);
3747 	if (unlikely(!p))
3748 		goto out_overflow;
3749 	n = be32_to_cpup(p);
3750 	for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3751 		u32 m;
3752 		struct nfs4_fs_location *loc;
3753 
3754 		if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3755 			break;
3756 		loc = &res->locations[res->nlocations];
3757 		p = xdr_inline_decode(xdr, 4);
3758 		if (unlikely(!p))
3759 			goto out_overflow;
3760 		m = be32_to_cpup(p);
3761 
3762 		dprintk("%s: servers:\n", __func__);
3763 		for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3764 			struct nfs4_string *server;
3765 
3766 			if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3767 				unsigned int i;
3768 				dprintk("%s: using first %u of %u servers "
3769 					"returned for location %u\n",
3770 						__func__,
3771 						NFS4_FS_LOCATION_MAXSERVERS,
3772 						m, res->nlocations);
3773 				for (i = loc->nservers; i < m; i++) {
3774 					unsigned int len;
3775 					char *data;
3776 					status = decode_opaque_inline(xdr, &len, &data);
3777 					if (unlikely(status != 0))
3778 						goto out_eio;
3779 				}
3780 				break;
3781 			}
3782 			server = &loc->servers[loc->nservers];
3783 			status = decode_opaque_inline(xdr, &server->len, &server->data);
3784 			if (unlikely(status != 0))
3785 				goto out_eio;
3786 			dprintk("%s ", server->data);
3787 		}
3788 		status = decode_pathname(xdr, &loc->rootpath);
3789 		if (unlikely(status != 0))
3790 			goto out_eio;
3791 	}
3792 	if (res->nlocations != 0)
3793 		status = NFS_ATTR_FATTR_V4_LOCATIONS;
3794 out:
3795 	dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3796 	return status;
3797 out_overflow:
3798 	print_overflow_msg(__func__, xdr);
3799 out_eio:
3800 	status = -EIO;
3801 	goto out;
3802 }
3803 
decode_attr_maxfilesize(struct xdr_stream * xdr,uint32_t * bitmap,uint64_t * res)3804 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3805 {
3806 	__be32 *p;
3807 	int status = 0;
3808 
3809 	*res = 0;
3810 	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3811 		return -EIO;
3812 	if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3813 		p = xdr_inline_decode(xdr, 8);
3814 		if (unlikely(!p))
3815 			goto out_overflow;
3816 		xdr_decode_hyper(p, res);
3817 		bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3818 	}
3819 	dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3820 	return status;
3821 out_overflow:
3822 	print_overflow_msg(__func__, xdr);
3823 	return -EIO;
3824 }
3825 
decode_attr_maxlink(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * maxlink)3826 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3827 {
3828 	__be32 *p;
3829 	int status = 0;
3830 
3831 	*maxlink = 1;
3832 	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3833 		return -EIO;
3834 	if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3835 		p = xdr_inline_decode(xdr, 4);
3836 		if (unlikely(!p))
3837 			goto out_overflow;
3838 		*maxlink = be32_to_cpup(p);
3839 		bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3840 	}
3841 	dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3842 	return status;
3843 out_overflow:
3844 	print_overflow_msg(__func__, xdr);
3845 	return -EIO;
3846 }
3847 
decode_attr_maxname(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * maxname)3848 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3849 {
3850 	__be32 *p;
3851 	int status = 0;
3852 
3853 	*maxname = 1024;
3854 	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3855 		return -EIO;
3856 	if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3857 		p = xdr_inline_decode(xdr, 4);
3858 		if (unlikely(!p))
3859 			goto out_overflow;
3860 		*maxname = be32_to_cpup(p);
3861 		bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3862 	}
3863 	dprintk("%s: maxname=%u\n", __func__, *maxname);
3864 	return status;
3865 out_overflow:
3866 	print_overflow_msg(__func__, xdr);
3867 	return -EIO;
3868 }
3869 
decode_attr_maxread(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * res)3870 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3871 {
3872 	__be32 *p;
3873 	int status = 0;
3874 
3875 	*res = 1024;
3876 	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3877 		return -EIO;
3878 	if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3879 		uint64_t maxread;
3880 		p = xdr_inline_decode(xdr, 8);
3881 		if (unlikely(!p))
3882 			goto out_overflow;
3883 		xdr_decode_hyper(p, &maxread);
3884 		if (maxread > 0x7FFFFFFF)
3885 			maxread = 0x7FFFFFFF;
3886 		*res = (uint32_t)maxread;
3887 		bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3888 	}
3889 	dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3890 	return status;
3891 out_overflow:
3892 	print_overflow_msg(__func__, xdr);
3893 	return -EIO;
3894 }
3895 
decode_attr_maxwrite(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * res)3896 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3897 {
3898 	__be32 *p;
3899 	int status = 0;
3900 
3901 	*res = 1024;
3902 	if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3903 		return -EIO;
3904 	if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3905 		uint64_t maxwrite;
3906 		p = xdr_inline_decode(xdr, 8);
3907 		if (unlikely(!p))
3908 			goto out_overflow;
3909 		xdr_decode_hyper(p, &maxwrite);
3910 		if (maxwrite > 0x7FFFFFFF)
3911 			maxwrite = 0x7FFFFFFF;
3912 		*res = (uint32_t)maxwrite;
3913 		bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3914 	}
3915 	dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3916 	return status;
3917 out_overflow:
3918 	print_overflow_msg(__func__, xdr);
3919 	return -EIO;
3920 }
3921 
decode_attr_mode(struct xdr_stream * xdr,uint32_t * bitmap,umode_t * mode)3922 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3923 {
3924 	uint32_t tmp;
3925 	__be32 *p;
3926 	int ret = 0;
3927 
3928 	*mode = 0;
3929 	if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3930 		return -EIO;
3931 	if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3932 		p = xdr_inline_decode(xdr, 4);
3933 		if (unlikely(!p))
3934 			goto out_overflow;
3935 		tmp = be32_to_cpup(p);
3936 		*mode = tmp & ~S_IFMT;
3937 		bitmap[1] &= ~FATTR4_WORD1_MODE;
3938 		ret = NFS_ATTR_FATTR_MODE;
3939 	}
3940 	dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3941 	return ret;
3942 out_overflow:
3943 	print_overflow_msg(__func__, xdr);
3944 	return -EIO;
3945 }
3946 
decode_attr_nlink(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * nlink)3947 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3948 {
3949 	__be32 *p;
3950 	int ret = 0;
3951 
3952 	*nlink = 1;
3953 	if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3954 		return -EIO;
3955 	if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3956 		p = xdr_inline_decode(xdr, 4);
3957 		if (unlikely(!p))
3958 			goto out_overflow;
3959 		*nlink = be32_to_cpup(p);
3960 		bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3961 		ret = NFS_ATTR_FATTR_NLINK;
3962 	}
3963 	dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3964 	return ret;
3965 out_overflow:
3966 	print_overflow_msg(__func__, xdr);
3967 	return -EIO;
3968 }
3969 
decode_nfs4_string(struct xdr_stream * xdr,struct nfs4_string * name,gfp_t gfp_flags)3970 static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3971 		struct nfs4_string *name, gfp_t gfp_flags)
3972 {
3973 	ssize_t ret;
3974 
3975 	ret = xdr_stream_decode_string_dup(xdr, &name->data,
3976 			XDR_MAX_NETOBJ, gfp_flags);
3977 	name->len = 0;
3978 	if (ret > 0)
3979 		name->len = ret;
3980 	return ret;
3981 }
3982 
decode_attr_owner(struct xdr_stream * xdr,uint32_t * bitmap,const struct nfs_server * server,kuid_t * uid,struct nfs4_string * owner_name)3983 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3984 		const struct nfs_server *server, kuid_t *uid,
3985 		struct nfs4_string *owner_name)
3986 {
3987 	ssize_t len;
3988 	char *p;
3989 
3990 	*uid = make_kuid(&init_user_ns, -2);
3991 	if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3992 		return -EIO;
3993 	if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3994 		return 0;
3995 	bitmap[1] &= ~FATTR4_WORD1_OWNER;
3996 
3997 	if (owner_name != NULL) {
3998 		len = decode_nfs4_string(xdr, owner_name, GFP_NOIO);
3999 		if (len <= 0)
4000 			goto out;
4001 		dprintk("%s: name=%s\n", __func__, owner_name->data);
4002 		return NFS_ATTR_FATTR_OWNER_NAME;
4003 	} else {
4004 		len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
4005 				XDR_MAX_NETOBJ);
4006 		if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
4007 			goto out;
4008 		dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
4009 		return NFS_ATTR_FATTR_OWNER;
4010 	}
4011 out:
4012 	if (len != -EBADMSG)
4013 		return 0;
4014 	print_overflow_msg(__func__, xdr);
4015 	return -EIO;
4016 }
4017 
decode_attr_group(struct xdr_stream * xdr,uint32_t * bitmap,const struct nfs_server * server,kgid_t * gid,struct nfs4_string * group_name)4018 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
4019 		const struct nfs_server *server, kgid_t *gid,
4020 		struct nfs4_string *group_name)
4021 {
4022 	ssize_t len;
4023 	char *p;
4024 
4025 	*gid = make_kgid(&init_user_ns, -2);
4026 	if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
4027 		return -EIO;
4028 	if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
4029 		return 0;
4030 	bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
4031 
4032 	if (group_name != NULL) {
4033 		len = decode_nfs4_string(xdr, group_name, GFP_NOIO);
4034 		if (len <= 0)
4035 			goto out;
4036 		dprintk("%s: name=%s\n", __func__, group_name->data);
4037 		return NFS_ATTR_FATTR_GROUP_NAME;
4038 	} else {
4039 		len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
4040 				XDR_MAX_NETOBJ);
4041 		if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
4042 			goto out;
4043 		dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
4044 		return NFS_ATTR_FATTR_GROUP;
4045 	}
4046 out:
4047 	if (len != -EBADMSG)
4048 		return 0;
4049 	print_overflow_msg(__func__, xdr);
4050 	return -EIO;
4051 }
4052 
decode_attr_rdev(struct xdr_stream * xdr,uint32_t * bitmap,dev_t * rdev)4053 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
4054 {
4055 	uint32_t major = 0, minor = 0;
4056 	__be32 *p;
4057 	int ret = 0;
4058 
4059 	*rdev = MKDEV(0,0);
4060 	if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
4061 		return -EIO;
4062 	if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
4063 		dev_t tmp;
4064 
4065 		p = xdr_inline_decode(xdr, 8);
4066 		if (unlikely(!p))
4067 			goto out_overflow;
4068 		major = be32_to_cpup(p++);
4069 		minor = be32_to_cpup(p);
4070 		tmp = MKDEV(major, minor);
4071 		if (MAJOR(tmp) == major && MINOR(tmp) == minor)
4072 			*rdev = tmp;
4073 		bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
4074 		ret = NFS_ATTR_FATTR_RDEV;
4075 	}
4076 	dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
4077 	return ret;
4078 out_overflow:
4079 	print_overflow_msg(__func__, xdr);
4080 	return -EIO;
4081 }
4082 
decode_attr_space_avail(struct xdr_stream * xdr,uint32_t * bitmap,uint64_t * res)4083 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4084 {
4085 	__be32 *p;
4086 	int status = 0;
4087 
4088 	*res = 0;
4089 	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
4090 		return -EIO;
4091 	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4092 		p = xdr_inline_decode(xdr, 8);
4093 		if (unlikely(!p))
4094 			goto out_overflow;
4095 		xdr_decode_hyper(p, res);
4096 		bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4097 	}
4098 	dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4099 	return status;
4100 out_overflow:
4101 	print_overflow_msg(__func__, xdr);
4102 	return -EIO;
4103 }
4104 
decode_attr_space_free(struct xdr_stream * xdr,uint32_t * bitmap,uint64_t * res)4105 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4106 {
4107 	__be32 *p;
4108 	int status = 0;
4109 
4110 	*res = 0;
4111 	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4112 		return -EIO;
4113 	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4114 		p = xdr_inline_decode(xdr, 8);
4115 		if (unlikely(!p))
4116 			goto out_overflow;
4117 		xdr_decode_hyper(p, res);
4118 		bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4119 	}
4120 	dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4121 	return status;
4122 out_overflow:
4123 	print_overflow_msg(__func__, xdr);
4124 	return -EIO;
4125 }
4126 
decode_attr_space_total(struct xdr_stream * xdr,uint32_t * bitmap,uint64_t * res)4127 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4128 {
4129 	__be32 *p;
4130 	int status = 0;
4131 
4132 	*res = 0;
4133 	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4134 		return -EIO;
4135 	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4136 		p = xdr_inline_decode(xdr, 8);
4137 		if (unlikely(!p))
4138 			goto out_overflow;
4139 		xdr_decode_hyper(p, res);
4140 		bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4141 	}
4142 	dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4143 	return status;
4144 out_overflow:
4145 	print_overflow_msg(__func__, xdr);
4146 	return -EIO;
4147 }
4148 
decode_attr_space_used(struct xdr_stream * xdr,uint32_t * bitmap,uint64_t * used)4149 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4150 {
4151 	__be32 *p;
4152 	int ret = 0;
4153 
4154 	*used = 0;
4155 	if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4156 		return -EIO;
4157 	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4158 		p = xdr_inline_decode(xdr, 8);
4159 		if (unlikely(!p))
4160 			goto out_overflow;
4161 		xdr_decode_hyper(p, used);
4162 		bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4163 		ret = NFS_ATTR_FATTR_SPACE_USED;
4164 	}
4165 	dprintk("%s: space used=%Lu\n", __func__,
4166 			(unsigned long long)*used);
4167 	return ret;
4168 out_overflow:
4169 	print_overflow_msg(__func__, xdr);
4170 	return -EIO;
4171 }
4172 
4173 static __be32 *
xdr_decode_nfstime4(__be32 * p,struct timespec * t)4174 xdr_decode_nfstime4(__be32 *p, struct timespec *t)
4175 {
4176 	__u64 sec;
4177 
4178 	p = xdr_decode_hyper(p, &sec);
4179 	t-> tv_sec = (time_t)sec;
4180 	t->tv_nsec = be32_to_cpup(p++);
4181 	return p;
4182 }
4183 
decode_attr_time(struct xdr_stream * xdr,struct timespec * time)4184 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4185 {
4186 	__be32 *p;
4187 
4188 	p = xdr_inline_decode(xdr, nfstime4_maxsz << 2);
4189 	if (unlikely(!p))
4190 		goto out_overflow;
4191 	xdr_decode_nfstime4(p, time);
4192 	return 0;
4193 out_overflow:
4194 	print_overflow_msg(__func__, xdr);
4195 	return -EIO;
4196 }
4197 
decode_attr_time_access(struct xdr_stream * xdr,uint32_t * bitmap,struct timespec * time)4198 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4199 {
4200 	int status = 0;
4201 
4202 	time->tv_sec = 0;
4203 	time->tv_nsec = 0;
4204 	if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4205 		return -EIO;
4206 	if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4207 		status = decode_attr_time(xdr, time);
4208 		if (status == 0)
4209 			status = NFS_ATTR_FATTR_ATIME;
4210 		bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4211 	}
4212 	dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4213 	return status;
4214 }
4215 
decode_attr_time_metadata(struct xdr_stream * xdr,uint32_t * bitmap,struct timespec * time)4216 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4217 {
4218 	int status = 0;
4219 
4220 	time->tv_sec = 0;
4221 	time->tv_nsec = 0;
4222 	if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4223 		return -EIO;
4224 	if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4225 		status = decode_attr_time(xdr, time);
4226 		if (status == 0)
4227 			status = NFS_ATTR_FATTR_CTIME;
4228 		bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4229 	}
4230 	dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4231 	return status;
4232 }
4233 
decode_attr_time_delta(struct xdr_stream * xdr,uint32_t * bitmap,struct timespec * time)4234 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4235 				  struct timespec *time)
4236 {
4237 	int status = 0;
4238 
4239 	time->tv_sec = 0;
4240 	time->tv_nsec = 0;
4241 	if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4242 		return -EIO;
4243 	if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4244 		status = decode_attr_time(xdr, time);
4245 		bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4246 	}
4247 	dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4248 		(long)time->tv_nsec);
4249 	return status;
4250 }
4251 
decode_attr_security_label(struct xdr_stream * xdr,uint32_t * bitmap,struct nfs4_label * label)4252 static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4253 					struct nfs4_label *label)
4254 {
4255 	uint32_t pi = 0;
4256 	uint32_t lfs = 0;
4257 	__u32 len;
4258 	__be32 *p;
4259 	int status = 0;
4260 
4261 	if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4262 		return -EIO;
4263 	if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4264 		p = xdr_inline_decode(xdr, 4);
4265 		if (unlikely(!p))
4266 			goto out_overflow;
4267 		lfs = be32_to_cpup(p++);
4268 		p = xdr_inline_decode(xdr, 4);
4269 		if (unlikely(!p))
4270 			goto out_overflow;
4271 		pi = be32_to_cpup(p++);
4272 		p = xdr_inline_decode(xdr, 4);
4273 		if (unlikely(!p))
4274 			goto out_overflow;
4275 		len = be32_to_cpup(p++);
4276 		p = xdr_inline_decode(xdr, len);
4277 		if (unlikely(!p))
4278 			goto out_overflow;
4279 		if (len < NFS4_MAXLABELLEN) {
4280 			if (label && label->len) {
4281 				if (label->len < len)
4282 					return -ERANGE;
4283 				memcpy(label->label, p, len);
4284 				label->len = len;
4285 				label->pi = pi;
4286 				label->lfs = lfs;
4287 				status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4288 			}
4289 			bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4290 		} else
4291 			printk(KERN_WARNING "%s: label too long (%u)!\n",
4292 					__func__, len);
4293 		if (label && label->label)
4294 			dprintk("%s: label=%.*s, len=%d, PI=%d, LFS=%d\n",
4295 				__func__, label->len, (char *)label->label,
4296 				label->len, label->pi, label->lfs);
4297 	}
4298 	return status;
4299 
4300 out_overflow:
4301 	print_overflow_msg(__func__, xdr);
4302 	return -EIO;
4303 }
4304 
decode_attr_time_modify(struct xdr_stream * xdr,uint32_t * bitmap,struct timespec * time)4305 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4306 {
4307 	int status = 0;
4308 
4309 	time->tv_sec = 0;
4310 	time->tv_nsec = 0;
4311 	if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4312 		return -EIO;
4313 	if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4314 		status = decode_attr_time(xdr, time);
4315 		if (status == 0)
4316 			status = NFS_ATTR_FATTR_MTIME;
4317 		bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4318 	}
4319 	dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4320 	return status;
4321 }
4322 
verify_attr_len(struct xdr_stream * xdr,unsigned int savep,uint32_t attrlen)4323 static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4324 {
4325 	unsigned int attrwords = XDR_QUADLEN(attrlen);
4326 	unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4327 
4328 	if (unlikely(attrwords != nwords)) {
4329 		dprintk("%s: server returned incorrect attribute length: "
4330 			"%u %c %u\n",
4331 				__func__,
4332 				attrwords << 2,
4333 				(attrwords < nwords) ? '<' : '>',
4334 				nwords << 2);
4335 		return -EIO;
4336 	}
4337 	return 0;
4338 }
4339 
decode_change_info(struct xdr_stream * xdr,struct nfs4_change_info * cinfo)4340 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4341 {
4342 	__be32 *p;
4343 
4344 	p = xdr_inline_decode(xdr, 20);
4345 	if (unlikely(!p))
4346 		goto out_overflow;
4347 	cinfo->atomic = be32_to_cpup(p++);
4348 	p = xdr_decode_hyper(p, &cinfo->before);
4349 	xdr_decode_hyper(p, &cinfo->after);
4350 	return 0;
4351 out_overflow:
4352 	print_overflow_msg(__func__, xdr);
4353 	return -EIO;
4354 }
4355 
decode_access(struct xdr_stream * xdr,u32 * supported,u32 * access)4356 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4357 {
4358 	__be32 *p;
4359 	uint32_t supp, acc;
4360 	int status;
4361 
4362 	status = decode_op_hdr(xdr, OP_ACCESS);
4363 	if (status)
4364 		return status;
4365 	p = xdr_inline_decode(xdr, 8);
4366 	if (unlikely(!p))
4367 		goto out_overflow;
4368 	supp = be32_to_cpup(p++);
4369 	acc = be32_to_cpup(p);
4370 	*supported = supp;
4371 	*access = acc;
4372 	return 0;
4373 out_overflow:
4374 	print_overflow_msg(__func__, xdr);
4375 	return -EIO;
4376 }
4377 
decode_opaque_fixed(struct xdr_stream * xdr,void * buf,size_t len)4378 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4379 {
4380 	ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4381 	if (unlikely(ret < 0)) {
4382 		print_overflow_msg(__func__, xdr);
4383 		return -EIO;
4384 	}
4385 	return 0;
4386 }
4387 
decode_stateid(struct xdr_stream * xdr,nfs4_stateid * stateid)4388 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4389 {
4390 	return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4391 }
4392 
decode_open_stateid(struct xdr_stream * xdr,nfs4_stateid * stateid)4393 static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4394 {
4395 	stateid->type = NFS4_OPEN_STATEID_TYPE;
4396 	return decode_stateid(xdr, stateid);
4397 }
4398 
decode_lock_stateid(struct xdr_stream * xdr,nfs4_stateid * stateid)4399 static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4400 {
4401 	stateid->type = NFS4_LOCK_STATEID_TYPE;
4402 	return decode_stateid(xdr, stateid);
4403 }
4404 
decode_delegation_stateid(struct xdr_stream * xdr,nfs4_stateid * stateid)4405 static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4406 {
4407 	stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4408 	return decode_stateid(xdr, stateid);
4409 }
4410 
decode_invalid_stateid(struct xdr_stream * xdr,nfs4_stateid * stateid)4411 static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4412 {
4413 	nfs4_stateid dummy;
4414 
4415 	nfs4_stateid_copy(stateid, &invalid_stateid);
4416 	return decode_stateid(xdr, &dummy);
4417 }
4418 
decode_close(struct xdr_stream * xdr,struct nfs_closeres * res)4419 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4420 {
4421 	int status;
4422 
4423 	status = decode_op_hdr(xdr, OP_CLOSE);
4424 	if (status != -EIO)
4425 		nfs_increment_open_seqid(status, res->seqid);
4426 	if (!status)
4427 		status = decode_invalid_stateid(xdr, &res->stateid);
4428 	return status;
4429 }
4430 
decode_verifier(struct xdr_stream * xdr,void * verifier)4431 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4432 {
4433 	return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4434 }
4435 
decode_write_verifier(struct xdr_stream * xdr,struct nfs_write_verifier * verifier)4436 static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4437 {
4438 	return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4439 }
4440 
decode_commit(struct xdr_stream * xdr,struct nfs_commitres * res)4441 static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4442 {
4443 	struct nfs_writeverf *verf = res->verf;
4444 	int status;
4445 
4446 	status = decode_op_hdr(xdr, OP_COMMIT);
4447 	if (!status)
4448 		status = decode_write_verifier(xdr, &verf->verifier);
4449 	if (!status)
4450 		verf->committed = NFS_FILE_SYNC;
4451 	return status;
4452 }
4453 
decode_create(struct xdr_stream * xdr,struct nfs4_change_info * cinfo)4454 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4455 {
4456 	__be32 *p;
4457 	uint32_t bmlen;
4458 	int status;
4459 
4460 	status = decode_op_hdr(xdr, OP_CREATE);
4461 	if (status)
4462 		return status;
4463 	if ((status = decode_change_info(xdr, cinfo)))
4464 		return status;
4465 	p = xdr_inline_decode(xdr, 4);
4466 	if (unlikely(!p))
4467 		goto out_overflow;
4468 	bmlen = be32_to_cpup(p);
4469 	p = xdr_inline_decode(xdr, bmlen << 2);
4470 	if (likely(p))
4471 		return 0;
4472 out_overflow:
4473 	print_overflow_msg(__func__, xdr);
4474 	return -EIO;
4475 }
4476 
decode_server_caps(struct xdr_stream * xdr,struct nfs4_server_caps_res * res)4477 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4478 {
4479 	unsigned int savep;
4480 	uint32_t attrlen, bitmap[3] = {0};
4481 	int status;
4482 
4483 	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4484 		goto xdr_error;
4485 	if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4486 		goto xdr_error;
4487 	if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4488 		goto xdr_error;
4489 	if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4490 		goto xdr_error;
4491 	if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4492 						 &res->fh_expire_type)) != 0)
4493 		goto xdr_error;
4494 	if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4495 		goto xdr_error;
4496 	if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4497 		goto xdr_error;
4498 	if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4499 		goto xdr_error;
4500 	if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4501 				res->exclcreat_bitmask)) != 0)
4502 		goto xdr_error;
4503 	status = verify_attr_len(xdr, savep, attrlen);
4504 xdr_error:
4505 	dprintk("%s: xdr returned %d!\n", __func__, -status);
4506 	return status;
4507 }
4508 
decode_statfs(struct xdr_stream * xdr,struct nfs_fsstat * fsstat)4509 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4510 {
4511 	unsigned int savep;
4512 	uint32_t attrlen, bitmap[3] = {0};
4513 	int status;
4514 
4515 	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4516 		goto xdr_error;
4517 	if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4518 		goto xdr_error;
4519 	if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4520 		goto xdr_error;
4521 
4522 	if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4523 		goto xdr_error;
4524 	if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4525 		goto xdr_error;
4526 	if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4527 		goto xdr_error;
4528 
4529 	status = -EIO;
4530 	if (unlikely(bitmap[0]))
4531 		goto xdr_error;
4532 
4533 	if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4534 		goto xdr_error;
4535 	if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4536 		goto xdr_error;
4537 	if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4538 		goto xdr_error;
4539 
4540 	status = verify_attr_len(xdr, savep, attrlen);
4541 xdr_error:
4542 	dprintk("%s: xdr returned %d!\n", __func__, -status);
4543 	return status;
4544 }
4545 
decode_pathconf(struct xdr_stream * xdr,struct nfs_pathconf * pathconf)4546 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4547 {
4548 	unsigned int savep;
4549 	uint32_t attrlen, bitmap[3] = {0};
4550 	int status;
4551 
4552 	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4553 		goto xdr_error;
4554 	if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4555 		goto xdr_error;
4556 	if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4557 		goto xdr_error;
4558 
4559 	if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4560 		goto xdr_error;
4561 	if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4562 		goto xdr_error;
4563 
4564 	status = verify_attr_len(xdr, savep, attrlen);
4565 xdr_error:
4566 	dprintk("%s: xdr returned %d!\n", __func__, -status);
4567 	return status;
4568 }
4569 
decode_threshold_hint(struct xdr_stream * xdr,uint32_t * bitmap,uint64_t * res,uint32_t hint_bit)4570 static int decode_threshold_hint(struct xdr_stream *xdr,
4571 				  uint32_t *bitmap,
4572 				  uint64_t *res,
4573 				  uint32_t hint_bit)
4574 {
4575 	__be32 *p;
4576 
4577 	*res = 0;
4578 	if (likely(bitmap[0] & hint_bit)) {
4579 		p = xdr_inline_decode(xdr, 8);
4580 		if (unlikely(!p))
4581 			goto out_overflow;
4582 		xdr_decode_hyper(p, res);
4583 	}
4584 	return 0;
4585 out_overflow:
4586 	print_overflow_msg(__func__, xdr);
4587 	return -EIO;
4588 }
4589 
decode_first_threshold_item4(struct xdr_stream * xdr,struct nfs4_threshold * res)4590 static int decode_first_threshold_item4(struct xdr_stream *xdr,
4591 					struct nfs4_threshold *res)
4592 {
4593 	__be32 *p;
4594 	unsigned int savep;
4595 	uint32_t bitmap[3] = {0,}, attrlen;
4596 	int status;
4597 
4598 	/* layout type */
4599 	p = xdr_inline_decode(xdr, 4);
4600 	if (unlikely(!p)) {
4601 		print_overflow_msg(__func__, xdr);
4602 		return -EIO;
4603 	}
4604 	res->l_type = be32_to_cpup(p);
4605 
4606 	/* thi_hintset bitmap */
4607 	status = decode_attr_bitmap(xdr, bitmap);
4608 	if (status < 0)
4609 		goto xdr_error;
4610 
4611 	/* thi_hintlist length */
4612 	status = decode_attr_length(xdr, &attrlen, &savep);
4613 	if (status < 0)
4614 		goto xdr_error;
4615 	/* thi_hintlist */
4616 	status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4617 	if (status < 0)
4618 		goto xdr_error;
4619 	status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4620 	if (status < 0)
4621 		goto xdr_error;
4622 	status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4623 				       THRESHOLD_RD_IO);
4624 	if (status < 0)
4625 		goto xdr_error;
4626 	status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4627 				       THRESHOLD_WR_IO);
4628 	if (status < 0)
4629 		goto xdr_error;
4630 
4631 	status = verify_attr_len(xdr, savep, attrlen);
4632 	res->bm = bitmap[0];
4633 
4634 	dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4635 		 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4636 		res->wr_io_sz);
4637 xdr_error:
4638 	dprintk("%s ret=%d!\n", __func__, status);
4639 	return status;
4640 }
4641 
4642 /*
4643  * Thresholds on pNFS direct I/O vrs MDS I/O
4644  */
decode_attr_mdsthreshold(struct xdr_stream * xdr,uint32_t * bitmap,struct nfs4_threshold * res)4645 static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4646 				    uint32_t *bitmap,
4647 				    struct nfs4_threshold *res)
4648 {
4649 	__be32 *p;
4650 	int status = 0;
4651 	uint32_t num;
4652 
4653 	if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4654 		return -EIO;
4655 	if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4656 		/* Did the server return an unrequested attribute? */
4657 		if (unlikely(res == NULL))
4658 			return -EREMOTEIO;
4659 		p = xdr_inline_decode(xdr, 4);
4660 		if (unlikely(!p))
4661 			goto out_overflow;
4662 		num = be32_to_cpup(p);
4663 		if (num == 0)
4664 			return 0;
4665 		if (num > 1)
4666 			printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4667 				"drivers per filesystem not supported\n",
4668 				__func__);
4669 
4670 		status = decode_first_threshold_item4(xdr, res);
4671 		bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4672 	}
4673 	return status;
4674 out_overflow:
4675 	print_overflow_msg(__func__, xdr);
4676 	return -EIO;
4677 }
4678 
decode_getfattr_attrs(struct xdr_stream * xdr,uint32_t * bitmap,struct nfs_fattr * fattr,struct nfs_fh * fh,struct nfs4_fs_locations * fs_loc,struct nfs4_label * label,const struct nfs_server * server)4679 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4680 		struct nfs_fattr *fattr, struct nfs_fh *fh,
4681 		struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4682 		const struct nfs_server *server)
4683 {
4684 	int status;
4685 	umode_t fmode = 0;
4686 	uint32_t type;
4687 	int32_t err;
4688 
4689 	status = decode_attr_type(xdr, bitmap, &type);
4690 	if (status < 0)
4691 		goto xdr_error;
4692 	fattr->mode = 0;
4693 	if (status != 0) {
4694 		fattr->mode |= nfs_type2fmt[type];
4695 		fattr->valid |= status;
4696 	}
4697 
4698 	status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4699 	if (status < 0)
4700 		goto xdr_error;
4701 	fattr->valid |= status;
4702 
4703 	status = decode_attr_size(xdr, bitmap, &fattr->size);
4704 	if (status < 0)
4705 		goto xdr_error;
4706 	fattr->valid |= status;
4707 
4708 	status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4709 	if (status < 0)
4710 		goto xdr_error;
4711 	fattr->valid |= status;
4712 
4713 	err = 0;
4714 	status = decode_attr_error(xdr, bitmap, &err);
4715 	if (status < 0)
4716 		goto xdr_error;
4717 
4718 	status = decode_attr_filehandle(xdr, bitmap, fh);
4719 	if (status < 0)
4720 		goto xdr_error;
4721 
4722 	status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4723 	if (status < 0)
4724 		goto xdr_error;
4725 	fattr->valid |= status;
4726 
4727 	status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4728 	if (status < 0)
4729 		goto xdr_error;
4730 	fattr->valid |= status;
4731 
4732 	status = -EIO;
4733 	if (unlikely(bitmap[0]))
4734 		goto xdr_error;
4735 
4736 	status = decode_attr_mode(xdr, bitmap, &fmode);
4737 	if (status < 0)
4738 		goto xdr_error;
4739 	if (status != 0) {
4740 		fattr->mode |= fmode;
4741 		fattr->valid |= status;
4742 	}
4743 
4744 	status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4745 	if (status < 0)
4746 		goto xdr_error;
4747 	fattr->valid |= status;
4748 
4749 	status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4750 	if (status < 0)
4751 		goto xdr_error;
4752 	fattr->valid |= status;
4753 
4754 	status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4755 	if (status < 0)
4756 		goto xdr_error;
4757 	fattr->valid |= status;
4758 
4759 	status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4760 	if (status < 0)
4761 		goto xdr_error;
4762 	fattr->valid |= status;
4763 
4764 	status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4765 	if (status < 0)
4766 		goto xdr_error;
4767 	fattr->valid |= status;
4768 
4769 	status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4770 	if (status < 0)
4771 		goto xdr_error;
4772 	fattr->valid |= status;
4773 
4774 	status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4775 	if (status < 0)
4776 		goto xdr_error;
4777 	fattr->valid |= status;
4778 
4779 	status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4780 	if (status < 0)
4781 		goto xdr_error;
4782 	fattr->valid |= status;
4783 
4784 	status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4785 	if (status < 0)
4786 		goto xdr_error;
4787 	fattr->valid |= status;
4788 
4789 	status = -EIO;
4790 	if (unlikely(bitmap[1]))
4791 		goto xdr_error;
4792 
4793 	status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4794 	if (status < 0)
4795 		goto xdr_error;
4796 
4797 	if (label) {
4798 		status = decode_attr_security_label(xdr, bitmap, label);
4799 		if (status < 0)
4800 			goto xdr_error;
4801 		fattr->valid |= status;
4802 	}
4803 
4804 xdr_error:
4805 	dprintk("%s: xdr returned %d\n", __func__, -status);
4806 	return status;
4807 }
4808 
decode_getfattr_generic(struct xdr_stream * xdr,struct nfs_fattr * fattr,struct nfs_fh * fh,struct nfs4_fs_locations * fs_loc,struct nfs4_label * label,const struct nfs_server * server)4809 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4810 		struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4811 		struct nfs4_label *label, const struct nfs_server *server)
4812 {
4813 	unsigned int savep;
4814 	uint32_t attrlen,
4815 		 bitmap[3] = {0};
4816 	int status;
4817 
4818 	status = decode_op_hdr(xdr, OP_GETATTR);
4819 	if (status < 0)
4820 		goto xdr_error;
4821 
4822 	status = decode_attr_bitmap(xdr, bitmap);
4823 	if (status < 0)
4824 		goto xdr_error;
4825 
4826 	status = decode_attr_length(xdr, &attrlen, &savep);
4827 	if (status < 0)
4828 		goto xdr_error;
4829 
4830 	status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4831 					label, server);
4832 	if (status < 0)
4833 		goto xdr_error;
4834 
4835 	status = verify_attr_len(xdr, savep, attrlen);
4836 xdr_error:
4837 	dprintk("%s: xdr returned %d\n", __func__, -status);
4838 	return status;
4839 }
4840 
decode_getfattr_label(struct xdr_stream * xdr,struct nfs_fattr * fattr,struct nfs4_label * label,const struct nfs_server * server)4841 static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4842 		struct nfs4_label *label, const struct nfs_server *server)
4843 {
4844 	return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4845 }
4846 
decode_getfattr(struct xdr_stream * xdr,struct nfs_fattr * fattr,const struct nfs_server * server)4847 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4848 		const struct nfs_server *server)
4849 {
4850 	return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4851 }
4852 
4853 /*
4854  * Decode potentially multiple layout types.
4855  */
decode_pnfs_layout_types(struct xdr_stream * xdr,struct nfs_fsinfo * fsinfo)4856 static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4857 				    struct nfs_fsinfo *fsinfo)
4858 {
4859 	__be32 *p;
4860 	uint32_t i;
4861 
4862 	p = xdr_inline_decode(xdr, 4);
4863 	if (unlikely(!p))
4864 		goto out_overflow;
4865 	fsinfo->nlayouttypes = be32_to_cpup(p);
4866 
4867 	/* pNFS is not supported by the underlying file system */
4868 	if (fsinfo->nlayouttypes == 0)
4869 		return 0;
4870 
4871 	/* Decode and set first layout type, move xdr->p past unused types */
4872 	p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4873 	if (unlikely(!p))
4874 		goto out_overflow;
4875 
4876 	/* If we get too many, then just cap it at the max */
4877 	if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4878 		printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4879 			__func__, fsinfo->nlayouttypes);
4880 		fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4881 	}
4882 
4883 	for(i = 0; i < fsinfo->nlayouttypes; ++i)
4884 		fsinfo->layouttype[i] = be32_to_cpup(p++);
4885 	return 0;
4886 out_overflow:
4887 	print_overflow_msg(__func__, xdr);
4888 	return -EIO;
4889 }
4890 
4891 /*
4892  * The type of file system exported.
4893  * Note we must ensure that layouttype is set in any non-error case.
4894  */
decode_attr_pnfstype(struct xdr_stream * xdr,uint32_t * bitmap,struct nfs_fsinfo * fsinfo)4895 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4896 				struct nfs_fsinfo *fsinfo)
4897 {
4898 	int status = 0;
4899 
4900 	dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4901 	if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4902 		return -EIO;
4903 	if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4904 		status = decode_pnfs_layout_types(xdr, fsinfo);
4905 		bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4906 	}
4907 	return status;
4908 }
4909 
4910 /*
4911  * The prefered block size for layout directed io
4912  */
decode_attr_layout_blksize(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * res)4913 static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4914 				      uint32_t *res)
4915 {
4916 	__be32 *p;
4917 
4918 	dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4919 	*res = 0;
4920 	if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4921 		p = xdr_inline_decode(xdr, 4);
4922 		if (unlikely(!p)) {
4923 			print_overflow_msg(__func__, xdr);
4924 			return -EIO;
4925 		}
4926 		*res = be32_to_cpup(p);
4927 		bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4928 	}
4929 	return 0;
4930 }
4931 
4932 /*
4933  * The granularity of a CLONE operation.
4934  */
decode_attr_clone_blksize(struct xdr_stream * xdr,uint32_t * bitmap,uint32_t * res)4935 static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4936 				     uint32_t *res)
4937 {
4938 	__be32 *p;
4939 
4940 	dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4941 	*res = 0;
4942 	if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4943 		p = xdr_inline_decode(xdr, 4);
4944 		if (unlikely(!p)) {
4945 			print_overflow_msg(__func__, xdr);
4946 			return -EIO;
4947 		}
4948 		*res = be32_to_cpup(p);
4949 		bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4950 	}
4951 	return 0;
4952 }
4953 
decode_fsinfo(struct xdr_stream * xdr,struct nfs_fsinfo * fsinfo)4954 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4955 {
4956 	unsigned int savep;
4957 	uint32_t attrlen, bitmap[3];
4958 	int status;
4959 
4960 	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4961 		goto xdr_error;
4962 	if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4963 		goto xdr_error;
4964 	if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4965 		goto xdr_error;
4966 
4967 	fsinfo->rtmult = fsinfo->wtmult = 512;	/* ??? */
4968 
4969 	if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4970 		goto xdr_error;
4971 	if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4972 		goto xdr_error;
4973 	if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4974 		goto xdr_error;
4975 	fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4976 	if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4977 		goto xdr_error;
4978 	fsinfo->wtpref = fsinfo->wtmax;
4979 
4980 	status = -EIO;
4981 	if (unlikely(bitmap[0]))
4982 		goto xdr_error;
4983 
4984 	status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4985 	if (status != 0)
4986 		goto xdr_error;
4987 	status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4988 	if (status != 0)
4989 		goto xdr_error;
4990 
4991 	status = -EIO;
4992 	if (unlikely(bitmap[1]))
4993 		goto xdr_error;
4994 
4995 	status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4996 	if (status)
4997 		goto xdr_error;
4998 	status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4999 	if (status)
5000 		goto xdr_error;
5001 
5002 	status = verify_attr_len(xdr, savep, attrlen);
5003 xdr_error:
5004 	dprintk("%s: xdr returned %d!\n", __func__, -status);
5005 	return status;
5006 }
5007 
decode_getfh(struct xdr_stream * xdr,struct nfs_fh * fh)5008 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
5009 {
5010 	__be32 *p;
5011 	uint32_t len;
5012 	int status;
5013 
5014 	/* Zero handle first to allow comparisons */
5015 	memset(fh, 0, sizeof(*fh));
5016 
5017 	status = decode_op_hdr(xdr, OP_GETFH);
5018 	if (status)
5019 		return status;
5020 
5021 	p = xdr_inline_decode(xdr, 4);
5022 	if (unlikely(!p))
5023 		goto out_overflow;
5024 	len = be32_to_cpup(p);
5025 	if (len > NFS4_FHSIZE)
5026 		return -EIO;
5027 	fh->size = len;
5028 	p = xdr_inline_decode(xdr, len);
5029 	if (unlikely(!p))
5030 		goto out_overflow;
5031 	memcpy(fh->data, p, len);
5032 	return 0;
5033 out_overflow:
5034 	print_overflow_msg(__func__, xdr);
5035 	return -EIO;
5036 }
5037 
decode_link(struct xdr_stream * xdr,struct nfs4_change_info * cinfo)5038 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5039 {
5040 	int status;
5041 
5042 	status = decode_op_hdr(xdr, OP_LINK);
5043 	if (status)
5044 		return status;
5045 	return decode_change_info(xdr, cinfo);
5046 }
5047 
5048 /*
5049  * We create the owner, so we know a proper owner.id length is 4.
5050  */
decode_lock_denied(struct xdr_stream * xdr,struct file_lock * fl)5051 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
5052 {
5053 	uint64_t offset, length, clientid;
5054 	__be32 *p;
5055 	uint32_t namelen, type;
5056 
5057 	p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
5058 	if (unlikely(!p))
5059 		goto out_overflow;
5060 	p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
5061 	p = xdr_decode_hyper(p, &length);
5062 	type = be32_to_cpup(p++); /* 4 byte read */
5063 	if (fl != NULL) { /* manipulate file lock */
5064 		fl->fl_start = (loff_t)offset;
5065 		fl->fl_end = fl->fl_start + (loff_t)length - 1;
5066 		if (length == ~(uint64_t)0)
5067 			fl->fl_end = OFFSET_MAX;
5068 		fl->fl_type = F_WRLCK;
5069 		if (type & 1)
5070 			fl->fl_type = F_RDLCK;
5071 		fl->fl_pid = 0;
5072 	}
5073 	p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
5074 	namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
5075 	p = xdr_inline_decode(xdr, namelen); /* variable size field */
5076 	if (likely(p))
5077 		return -NFS4ERR_DENIED;
5078 out_overflow:
5079 	print_overflow_msg(__func__, xdr);
5080 	return -EIO;
5081 }
5082 
decode_lock(struct xdr_stream * xdr,struct nfs_lock_res * res)5083 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
5084 {
5085 	int status;
5086 
5087 	status = decode_op_hdr(xdr, OP_LOCK);
5088 	if (status == -EIO)
5089 		goto out;
5090 	if (status == 0) {
5091 		status = decode_lock_stateid(xdr, &res->stateid);
5092 		if (unlikely(status))
5093 			goto out;
5094 	} else if (status == -NFS4ERR_DENIED)
5095 		status = decode_lock_denied(xdr, NULL);
5096 	if (res->open_seqid != NULL)
5097 		nfs_increment_open_seqid(status, res->open_seqid);
5098 	nfs_increment_lock_seqid(status, res->lock_seqid);
5099 out:
5100 	return status;
5101 }
5102 
decode_lockt(struct xdr_stream * xdr,struct nfs_lockt_res * res)5103 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
5104 {
5105 	int status;
5106 	status = decode_op_hdr(xdr, OP_LOCKT);
5107 	if (status == -NFS4ERR_DENIED)
5108 		return decode_lock_denied(xdr, res->denied);
5109 	return status;
5110 }
5111 
decode_locku(struct xdr_stream * xdr,struct nfs_locku_res * res)5112 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
5113 {
5114 	int status;
5115 
5116 	status = decode_op_hdr(xdr, OP_LOCKU);
5117 	if (status != -EIO)
5118 		nfs_increment_lock_seqid(status, res->seqid);
5119 	if (status == 0)
5120 		status = decode_lock_stateid(xdr, &res->stateid);
5121 	return status;
5122 }
5123 
decode_release_lockowner(struct xdr_stream * xdr)5124 static int decode_release_lockowner(struct xdr_stream *xdr)
5125 {
5126 	return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5127 }
5128 
decode_lookup(struct xdr_stream * xdr)5129 static int decode_lookup(struct xdr_stream *xdr)
5130 {
5131 	return decode_op_hdr(xdr, OP_LOOKUP);
5132 }
5133 
decode_lookupp(struct xdr_stream * xdr)5134 static int decode_lookupp(struct xdr_stream *xdr)
5135 {
5136 	return decode_op_hdr(xdr, OP_LOOKUPP);
5137 }
5138 
5139 /* This is too sick! */
decode_space_limit(struct xdr_stream * xdr,unsigned long * pagemod_limit)5140 static int decode_space_limit(struct xdr_stream *xdr,
5141 		unsigned long *pagemod_limit)
5142 {
5143 	__be32 *p;
5144 	uint32_t limit_type, nblocks, blocksize;
5145 	u64 maxsize = 0;
5146 
5147 	p = xdr_inline_decode(xdr, 12);
5148 	if (unlikely(!p))
5149 		goto out_overflow;
5150 	limit_type = be32_to_cpup(p++);
5151 	switch (limit_type) {
5152 	case NFS4_LIMIT_SIZE:
5153 		xdr_decode_hyper(p, &maxsize);
5154 		break;
5155 	case NFS4_LIMIT_BLOCKS:
5156 		nblocks = be32_to_cpup(p++);
5157 		blocksize = be32_to_cpup(p);
5158 		maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5159 	}
5160 	maxsize >>= PAGE_SHIFT;
5161 	*pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5162 	return 0;
5163 out_overflow:
5164 	print_overflow_msg(__func__, xdr);
5165 	return -EIO;
5166 }
5167 
decode_rw_delegation(struct xdr_stream * xdr,uint32_t delegation_type,struct nfs_openres * res)5168 static int decode_rw_delegation(struct xdr_stream *xdr,
5169 		uint32_t delegation_type,
5170 		struct nfs_openres *res)
5171 {
5172 	__be32 *p;
5173 	int status;
5174 
5175 	status = decode_delegation_stateid(xdr, &res->delegation);
5176 	if (unlikely(status))
5177 		return status;
5178 	p = xdr_inline_decode(xdr, 4);
5179 	if (unlikely(!p))
5180 		goto out_overflow;
5181 	res->do_recall = be32_to_cpup(p);
5182 
5183 	switch (delegation_type) {
5184 	case NFS4_OPEN_DELEGATE_READ:
5185 		res->delegation_type = FMODE_READ;
5186 		break;
5187 	case NFS4_OPEN_DELEGATE_WRITE:
5188 		res->delegation_type = FMODE_WRITE|FMODE_READ;
5189 		if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5190 				return -EIO;
5191 	}
5192 	return decode_ace(xdr, NULL);
5193 out_overflow:
5194 	print_overflow_msg(__func__, xdr);
5195 	return -EIO;
5196 }
5197 
decode_no_delegation(struct xdr_stream * xdr,struct nfs_openres * res)5198 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5199 {
5200 	__be32 *p;
5201 	uint32_t why_no_delegation;
5202 
5203 	p = xdr_inline_decode(xdr, 4);
5204 	if (unlikely(!p))
5205 		goto out_overflow;
5206 	why_no_delegation = be32_to_cpup(p);
5207 	switch (why_no_delegation) {
5208 		case WND4_CONTENTION:
5209 		case WND4_RESOURCE:
5210 			xdr_inline_decode(xdr, 4);
5211 			/* Ignore for now */
5212 	}
5213 	return 0;
5214 out_overflow:
5215 	print_overflow_msg(__func__, xdr);
5216 	return -EIO;
5217 }
5218 
decode_delegation(struct xdr_stream * xdr,struct nfs_openres * res)5219 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5220 {
5221 	__be32 *p;
5222 	uint32_t delegation_type;
5223 
5224 	p = xdr_inline_decode(xdr, 4);
5225 	if (unlikely(!p))
5226 		goto out_overflow;
5227 	delegation_type = be32_to_cpup(p);
5228 	res->delegation_type = 0;
5229 	switch (delegation_type) {
5230 	case NFS4_OPEN_DELEGATE_NONE:
5231 		return 0;
5232 	case NFS4_OPEN_DELEGATE_READ:
5233 	case NFS4_OPEN_DELEGATE_WRITE:
5234 		return decode_rw_delegation(xdr, delegation_type, res);
5235 	case NFS4_OPEN_DELEGATE_NONE_EXT:
5236 		return decode_no_delegation(xdr, res);
5237 	}
5238 	return -EIO;
5239 out_overflow:
5240 	print_overflow_msg(__func__, xdr);
5241 	return -EIO;
5242 }
5243 
decode_open(struct xdr_stream * xdr,struct nfs_openres * res)5244 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5245 {
5246 	__be32 *p;
5247 	uint32_t savewords, bmlen, i;
5248 	int status;
5249 
5250 	if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5251 		return status;
5252 	nfs_increment_open_seqid(status, res->seqid);
5253 	if (status)
5254 		return status;
5255 	status = decode_open_stateid(xdr, &res->stateid);
5256 	if (unlikely(status))
5257 		return status;
5258 
5259 	decode_change_info(xdr, &res->cinfo);
5260 
5261 	p = xdr_inline_decode(xdr, 8);
5262 	if (unlikely(!p))
5263 		goto out_overflow;
5264 	res->rflags = be32_to_cpup(p++);
5265 	bmlen = be32_to_cpup(p);
5266 	if (bmlen > 10)
5267 		goto xdr_error;
5268 
5269 	p = xdr_inline_decode(xdr, bmlen << 2);
5270 	if (unlikely(!p))
5271 		goto out_overflow;
5272 	savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5273 	for (i = 0; i < savewords; ++i)
5274 		res->attrset[i] = be32_to_cpup(p++);
5275 	for (; i < NFS4_BITMAP_SIZE; i++)
5276 		res->attrset[i] = 0;
5277 
5278 	return decode_delegation(xdr, res);
5279 xdr_error:
5280 	dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5281 	return -EIO;
5282 out_overflow:
5283 	print_overflow_msg(__func__, xdr);
5284 	return -EIO;
5285 }
5286 
decode_open_confirm(struct xdr_stream * xdr,struct nfs_open_confirmres * res)5287 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5288 {
5289 	int status;
5290 
5291 	status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5292 	if (status != -EIO)
5293 		nfs_increment_open_seqid(status, res->seqid);
5294 	if (!status)
5295 		status = decode_open_stateid(xdr, &res->stateid);
5296 	return status;
5297 }
5298 
decode_open_downgrade(struct xdr_stream * xdr,struct nfs_closeres * res)5299 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5300 {
5301 	int status;
5302 
5303 	status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5304 	if (status != -EIO)
5305 		nfs_increment_open_seqid(status, res->seqid);
5306 	if (!status)
5307 		status = decode_open_stateid(xdr, &res->stateid);
5308 	return status;
5309 }
5310 
decode_putfh(struct xdr_stream * xdr)5311 static int decode_putfh(struct xdr_stream *xdr)
5312 {
5313 	return decode_op_hdr(xdr, OP_PUTFH);
5314 }
5315 
decode_putrootfh(struct xdr_stream * xdr)5316 static int decode_putrootfh(struct xdr_stream *xdr)
5317 {
5318 	return decode_op_hdr(xdr, OP_PUTROOTFH);
5319 }
5320 
decode_read(struct xdr_stream * xdr,struct rpc_rqst * req,struct nfs_pgio_res * res)5321 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5322 		       struct nfs_pgio_res *res)
5323 {
5324 	__be32 *p;
5325 	uint32_t count, eof, recvd;
5326 	int status;
5327 
5328 	status = decode_op_hdr(xdr, OP_READ);
5329 	if (status)
5330 		return status;
5331 	p = xdr_inline_decode(xdr, 8);
5332 	if (unlikely(!p))
5333 		goto out_overflow;
5334 	eof = be32_to_cpup(p++);
5335 	count = be32_to_cpup(p);
5336 	recvd = xdr_read_pages(xdr, count);
5337 	if (count > recvd) {
5338 		dprintk("NFS: server cheating in read reply: "
5339 				"count %u > recvd %u\n", count, recvd);
5340 		count = recvd;
5341 		eof = 0;
5342 	}
5343 	res->eof = eof;
5344 	res->count = count;
5345 	return 0;
5346 out_overflow:
5347 	print_overflow_msg(__func__, xdr);
5348 	return -EIO;
5349 }
5350 
decode_readdir(struct xdr_stream * xdr,struct rpc_rqst * req,struct nfs4_readdir_res * readdir)5351 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5352 {
5353 	int		status;
5354 	__be32		verf[2];
5355 
5356 	status = decode_op_hdr(xdr, OP_READDIR);
5357 	if (!status)
5358 		status = decode_verifier(xdr, readdir->verifier.data);
5359 	if (unlikely(status))
5360 		return status;
5361 	memcpy(verf, readdir->verifier.data, sizeof(verf));
5362 	dprintk("%s: verifier = %08x:%08x\n",
5363 			__func__, verf[0], verf[1]);
5364 	return xdr_read_pages(xdr, xdr->buf->page_len);
5365 }
5366 
decode_readlink(struct xdr_stream * xdr,struct rpc_rqst * req)5367 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5368 {
5369 	struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5370 	u32 len, recvd;
5371 	__be32 *p;
5372 	int status;
5373 
5374 	status = decode_op_hdr(xdr, OP_READLINK);
5375 	if (status)
5376 		return status;
5377 
5378 	/* Convert length of symlink */
5379 	p = xdr_inline_decode(xdr, 4);
5380 	if (unlikely(!p))
5381 		goto out_overflow;
5382 	len = be32_to_cpup(p);
5383 	if (len >= rcvbuf->page_len || len <= 0) {
5384 		dprintk("nfs: server returned giant symlink!\n");
5385 		return -ENAMETOOLONG;
5386 	}
5387 	recvd = xdr_read_pages(xdr, len);
5388 	if (recvd < len) {
5389 		dprintk("NFS: server cheating in readlink reply: "
5390 				"count %u > recvd %u\n", len, recvd);
5391 		return -EIO;
5392 	}
5393 	/*
5394 	 * The XDR encode routine has set things up so that
5395 	 * the link text will be copied directly into the
5396 	 * buffer.  We just have to do overflow-checking,
5397 	 * and and null-terminate the text (the VFS expects
5398 	 * null-termination).
5399 	 */
5400 	xdr_terminate_string(rcvbuf, len);
5401 	return 0;
5402 out_overflow:
5403 	print_overflow_msg(__func__, xdr);
5404 	return -EIO;
5405 }
5406 
decode_remove(struct xdr_stream * xdr,struct nfs4_change_info * cinfo)5407 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5408 {
5409 	int status;
5410 
5411 	status = decode_op_hdr(xdr, OP_REMOVE);
5412 	if (status)
5413 		goto out;
5414 	status = decode_change_info(xdr, cinfo);
5415 out:
5416 	return status;
5417 }
5418 
decode_rename(struct xdr_stream * xdr,struct nfs4_change_info * old_cinfo,struct nfs4_change_info * new_cinfo)5419 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5420 	      struct nfs4_change_info *new_cinfo)
5421 {
5422 	int status;
5423 
5424 	status = decode_op_hdr(xdr, OP_RENAME);
5425 	if (status)
5426 		goto out;
5427 	if ((status = decode_change_info(xdr, old_cinfo)))
5428 		goto out;
5429 	status = decode_change_info(xdr, new_cinfo);
5430 out:
5431 	return status;
5432 }
5433 
decode_renew(struct xdr_stream * xdr)5434 static int decode_renew(struct xdr_stream *xdr)
5435 {
5436 	return decode_op_hdr(xdr, OP_RENEW);
5437 }
5438 
5439 static int
decode_restorefh(struct xdr_stream * xdr)5440 decode_restorefh(struct xdr_stream *xdr)
5441 {
5442 	return decode_op_hdr(xdr, OP_RESTOREFH);
5443 }
5444 
decode_getacl(struct xdr_stream * xdr,struct rpc_rqst * req,struct nfs_getaclres * res)5445 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5446 			 struct nfs_getaclres *res)
5447 {
5448 	unsigned int savep;
5449 	uint32_t attrlen,
5450 		 bitmap[3] = {0};
5451 	int status;
5452 	unsigned int pg_offset;
5453 
5454 	res->acl_len = 0;
5455 	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5456 		goto out;
5457 
5458 	xdr_enter_page(xdr, xdr->buf->page_len);
5459 
5460 	/* Calculate the offset of the page data */
5461 	pg_offset = xdr->buf->head[0].iov_len;
5462 
5463 	if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5464 		goto out;
5465 	if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5466 		goto out;
5467 
5468 	if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5469 		return -EIO;
5470 	if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5471 
5472 		/* The bitmap (xdr len + bitmaps) and the attr xdr len words
5473 		 * are stored with the acl data to handle the problem of
5474 		 * variable length bitmaps.*/
5475 		res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5476 		res->acl_len = attrlen;
5477 
5478 		/* Check for receive buffer overflow */
5479 		if (res->acl_len > (xdr->nwords << 2) ||
5480 		    res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5481 			res->acl_flags |= NFS4_ACL_TRUNC;
5482 			dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5483 					attrlen, xdr->nwords << 2);
5484 		}
5485 	} else
5486 		status = -EOPNOTSUPP;
5487 
5488 out:
5489 	return status;
5490 }
5491 
5492 static int
decode_savefh(struct xdr_stream * xdr)5493 decode_savefh(struct xdr_stream *xdr)
5494 {
5495 	return decode_op_hdr(xdr, OP_SAVEFH);
5496 }
5497 
decode_setattr(struct xdr_stream * xdr)5498 static int decode_setattr(struct xdr_stream *xdr)
5499 {
5500 	int status;
5501 
5502 	status = decode_op_hdr(xdr, OP_SETATTR);
5503 	if (status)
5504 		return status;
5505 	if (decode_bitmap4(xdr, NULL, 0) >= 0)
5506 		return 0;
5507 	print_overflow_msg(__func__, xdr);
5508 	return -EIO;
5509 }
5510 
decode_setclientid(struct xdr_stream * xdr,struct nfs4_setclientid_res * res)5511 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5512 {
5513 	__be32 *p;
5514 	uint32_t opnum;
5515 	int32_t nfserr;
5516 
5517 	p = xdr_inline_decode(xdr, 8);
5518 	if (unlikely(!p))
5519 		goto out_overflow;
5520 	opnum = be32_to_cpup(p++);
5521 	if (opnum != OP_SETCLIENTID) {
5522 		dprintk("nfs: decode_setclientid: Server returned operation"
5523 			" %d\n", opnum);
5524 		return -EIO;
5525 	}
5526 	nfserr = be32_to_cpup(p);
5527 	if (nfserr == NFS_OK) {
5528 		p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5529 		if (unlikely(!p))
5530 			goto out_overflow;
5531 		p = xdr_decode_hyper(p, &res->clientid);
5532 		memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5533 	} else if (nfserr == NFSERR_CLID_INUSE) {
5534 		uint32_t len;
5535 
5536 		/* skip netid string */
5537 		p = xdr_inline_decode(xdr, 4);
5538 		if (unlikely(!p))
5539 			goto out_overflow;
5540 		len = be32_to_cpup(p);
5541 		p = xdr_inline_decode(xdr, len);
5542 		if (unlikely(!p))
5543 			goto out_overflow;
5544 
5545 		/* skip uaddr string */
5546 		p = xdr_inline_decode(xdr, 4);
5547 		if (unlikely(!p))
5548 			goto out_overflow;
5549 		len = be32_to_cpup(p);
5550 		p = xdr_inline_decode(xdr, len);
5551 		if (unlikely(!p))
5552 			goto out_overflow;
5553 		return -NFSERR_CLID_INUSE;
5554 	} else
5555 		return nfs4_stat_to_errno(nfserr);
5556 
5557 	return 0;
5558 out_overflow:
5559 	print_overflow_msg(__func__, xdr);
5560 	return -EIO;
5561 }
5562 
decode_setclientid_confirm(struct xdr_stream * xdr)5563 static int decode_setclientid_confirm(struct xdr_stream *xdr)
5564 {
5565 	return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5566 }
5567 
decode_write(struct xdr_stream * xdr,struct nfs_pgio_res * res)5568 static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5569 {
5570 	__be32 *p;
5571 	int status;
5572 
5573 	status = decode_op_hdr(xdr, OP_WRITE);
5574 	if (status)
5575 		return status;
5576 
5577 	p = xdr_inline_decode(xdr, 8);
5578 	if (unlikely(!p))
5579 		goto out_overflow;
5580 	res->count = be32_to_cpup(p++);
5581 	res->verf->committed = be32_to_cpup(p++);
5582 	return decode_write_verifier(xdr, &res->verf->verifier);
5583 out_overflow:
5584 	print_overflow_msg(__func__, xdr);
5585 	return -EIO;
5586 }
5587 
decode_delegreturn(struct xdr_stream * xdr)5588 static int decode_delegreturn(struct xdr_stream *xdr)
5589 {
5590 	return decode_op_hdr(xdr, OP_DELEGRETURN);
5591 }
5592 
decode_secinfo_gss(struct xdr_stream * xdr,struct nfs4_secinfo4 * flavor)5593 static int decode_secinfo_gss(struct xdr_stream *xdr,
5594 			      struct nfs4_secinfo4 *flavor)
5595 {
5596 	u32 oid_len;
5597 	__be32 *p;
5598 
5599 	p = xdr_inline_decode(xdr, 4);
5600 	if (unlikely(!p))
5601 		goto out_overflow;
5602 	oid_len = be32_to_cpup(p);
5603 	if (oid_len > GSS_OID_MAX_LEN)
5604 		goto out_err;
5605 
5606 	p = xdr_inline_decode(xdr, oid_len);
5607 	if (unlikely(!p))
5608 		goto out_overflow;
5609 	memcpy(flavor->flavor_info.oid.data, p, oid_len);
5610 	flavor->flavor_info.oid.len = oid_len;
5611 
5612 	p = xdr_inline_decode(xdr, 8);
5613 	if (unlikely(!p))
5614 		goto out_overflow;
5615 	flavor->flavor_info.qop = be32_to_cpup(p++);
5616 	flavor->flavor_info.service = be32_to_cpup(p);
5617 
5618 	return 0;
5619 
5620 out_overflow:
5621 	print_overflow_msg(__func__, xdr);
5622 	return -EIO;
5623 out_err:
5624 	return -EINVAL;
5625 }
5626 
decode_secinfo_common(struct xdr_stream * xdr,struct nfs4_secinfo_res * res)5627 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5628 {
5629 	struct nfs4_secinfo4 *sec_flavor;
5630 	unsigned int i, num_flavors;
5631 	int status;
5632 	__be32 *p;
5633 
5634 	p = xdr_inline_decode(xdr, 4);
5635 	if (unlikely(!p))
5636 		goto out_overflow;
5637 
5638 	res->flavors->num_flavors = 0;
5639 	num_flavors = be32_to_cpup(p);
5640 
5641 	for (i = 0; i < num_flavors; i++) {
5642 		sec_flavor = &res->flavors->flavors[i];
5643 		if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5644 			break;
5645 
5646 		p = xdr_inline_decode(xdr, 4);
5647 		if (unlikely(!p))
5648 			goto out_overflow;
5649 		sec_flavor->flavor = be32_to_cpup(p);
5650 
5651 		if (sec_flavor->flavor == RPC_AUTH_GSS) {
5652 			status = decode_secinfo_gss(xdr, sec_flavor);
5653 			if (status)
5654 				goto out;
5655 		}
5656 		res->flavors->num_flavors++;
5657 	}
5658 
5659 	status = 0;
5660 out:
5661 	return status;
5662 out_overflow:
5663 	print_overflow_msg(__func__, xdr);
5664 	return -EIO;
5665 }
5666 
decode_secinfo(struct xdr_stream * xdr,struct nfs4_secinfo_res * res)5667 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5668 {
5669 	int status = decode_op_hdr(xdr, OP_SECINFO);
5670 	if (status)
5671 		return status;
5672 	return decode_secinfo_common(xdr, res);
5673 }
5674 
5675 #if defined(CONFIG_NFS_V4_1)
decode_secinfo_no_name(struct xdr_stream * xdr,struct nfs4_secinfo_res * res)5676 static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5677 {
5678 	int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5679 	if (status)
5680 		return status;
5681 	return decode_secinfo_common(xdr, res);
5682 }
5683 
decode_op_map(struct xdr_stream * xdr,struct nfs4_op_map * op_map)5684 static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5685 {
5686 	__be32 *p;
5687 	uint32_t bitmap_words;
5688 	unsigned int i;
5689 
5690 	p = xdr_inline_decode(xdr, 4);
5691 	if (!p)
5692 		return -EIO;
5693 	bitmap_words = be32_to_cpup(p++);
5694 	if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5695 		return -EIO;
5696 	p = xdr_inline_decode(xdr, 4 * bitmap_words);
5697 	for (i = 0; i < bitmap_words; i++)
5698 		op_map->u.words[i] = be32_to_cpup(p++);
5699 
5700 	return 0;
5701 }
5702 
decode_exchange_id(struct xdr_stream * xdr,struct nfs41_exchange_id_res * res)5703 static int decode_exchange_id(struct xdr_stream *xdr,
5704 			      struct nfs41_exchange_id_res *res)
5705 {
5706 	__be32 *p;
5707 	uint32_t dummy;
5708 	char *dummy_str;
5709 	int status;
5710 	uint32_t impl_id_count;
5711 
5712 	status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5713 	if (status)
5714 		return status;
5715 
5716 	p = xdr_inline_decode(xdr, 8);
5717 	if (unlikely(!p))
5718 		goto out_overflow;
5719 	xdr_decode_hyper(p, &res->clientid);
5720 	p = xdr_inline_decode(xdr, 12);
5721 	if (unlikely(!p))
5722 		goto out_overflow;
5723 	res->seqid = be32_to_cpup(p++);
5724 	res->flags = be32_to_cpup(p++);
5725 
5726 	res->state_protect.how = be32_to_cpup(p);
5727 	switch (res->state_protect.how) {
5728 	case SP4_NONE:
5729 		break;
5730 	case SP4_MACH_CRED:
5731 		status = decode_op_map(xdr, &res->state_protect.enforce);
5732 		if (status)
5733 			return status;
5734 		status = decode_op_map(xdr, &res->state_protect.allow);
5735 		if (status)
5736 			return status;
5737 		break;
5738 	default:
5739 		WARN_ON_ONCE(1);
5740 		return -EIO;
5741 	}
5742 
5743 	/* server_owner4.so_minor_id */
5744 	p = xdr_inline_decode(xdr, 8);
5745 	if (unlikely(!p))
5746 		goto out_overflow;
5747 	p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5748 
5749 	/* server_owner4.so_major_id */
5750 	status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5751 	if (unlikely(status))
5752 		return status;
5753 	memcpy(res->server_owner->major_id, dummy_str, dummy);
5754 	res->server_owner->major_id_sz = dummy;
5755 
5756 	/* server_scope4 */
5757 	status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5758 	if (unlikely(status))
5759 		return status;
5760 	memcpy(res->server_scope->server_scope, dummy_str, dummy);
5761 	res->server_scope->server_scope_sz = dummy;
5762 
5763 	/* Implementation Id */
5764 	p = xdr_inline_decode(xdr, 4);
5765 	if (unlikely(!p))
5766 		goto out_overflow;
5767 	impl_id_count = be32_to_cpup(p++);
5768 
5769 	if (impl_id_count) {
5770 		/* nii_domain */
5771 		status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5772 		if (unlikely(status))
5773 			return status;
5774 		memcpy(res->impl_id->domain, dummy_str, dummy);
5775 
5776 		/* nii_name */
5777 		status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5778 		if (unlikely(status))
5779 			return status;
5780 		memcpy(res->impl_id->name, dummy_str, dummy);
5781 
5782 		/* nii_date */
5783 		p = xdr_inline_decode(xdr, 12);
5784 		if (unlikely(!p))
5785 			goto out_overflow;
5786 		p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5787 		res->impl_id->date.nseconds = be32_to_cpup(p);
5788 
5789 		/* if there's more than one entry, ignore the rest */
5790 	}
5791 	return 0;
5792 out_overflow:
5793 	print_overflow_msg(__func__, xdr);
5794 	return -EIO;
5795 }
5796 
decode_chan_attrs(struct xdr_stream * xdr,struct nfs4_channel_attrs * attrs)5797 static int decode_chan_attrs(struct xdr_stream *xdr,
5798 			     struct nfs4_channel_attrs *attrs)
5799 {
5800 	__be32 *p;
5801 	u32 nr_attrs, val;
5802 
5803 	p = xdr_inline_decode(xdr, 28);
5804 	if (unlikely(!p))
5805 		goto out_overflow;
5806 	val = be32_to_cpup(p++);	/* headerpadsz */
5807 	if (val)
5808 		return -EINVAL;		/* no support for header padding yet */
5809 	attrs->max_rqst_sz = be32_to_cpup(p++);
5810 	attrs->max_resp_sz = be32_to_cpup(p++);
5811 	attrs->max_resp_sz_cached = be32_to_cpup(p++);
5812 	attrs->max_ops = be32_to_cpup(p++);
5813 	attrs->max_reqs = be32_to_cpup(p++);
5814 	nr_attrs = be32_to_cpup(p);
5815 	if (unlikely(nr_attrs > 1)) {
5816 		printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5817 			"count %u\n", __func__, nr_attrs);
5818 		return -EINVAL;
5819 	}
5820 	if (nr_attrs == 1) {
5821 		p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5822 		if (unlikely(!p))
5823 			goto out_overflow;
5824 	}
5825 	return 0;
5826 out_overflow:
5827 	print_overflow_msg(__func__, xdr);
5828 	return -EIO;
5829 }
5830 
decode_sessionid(struct xdr_stream * xdr,struct nfs4_sessionid * sid)5831 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5832 {
5833 	return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5834 }
5835 
decode_bind_conn_to_session(struct xdr_stream * xdr,struct nfs41_bind_conn_to_session_res * res)5836 static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5837 				struct nfs41_bind_conn_to_session_res *res)
5838 {
5839 	__be32 *p;
5840 	int status;
5841 
5842 	status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5843 	if (!status)
5844 		status = decode_sessionid(xdr, &res->sessionid);
5845 	if (unlikely(status))
5846 		return status;
5847 
5848 	/* dir flags, rdma mode bool */
5849 	p = xdr_inline_decode(xdr, 8);
5850 	if (unlikely(!p))
5851 		goto out_overflow;
5852 
5853 	res->dir = be32_to_cpup(p++);
5854 	if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5855 		return -EIO;
5856 	if (be32_to_cpup(p) == 0)
5857 		res->use_conn_in_rdma_mode = false;
5858 	else
5859 		res->use_conn_in_rdma_mode = true;
5860 
5861 	return 0;
5862 out_overflow:
5863 	print_overflow_msg(__func__, xdr);
5864 	return -EIO;
5865 }
5866 
decode_create_session(struct xdr_stream * xdr,struct nfs41_create_session_res * res)5867 static int decode_create_session(struct xdr_stream *xdr,
5868 				 struct nfs41_create_session_res *res)
5869 {
5870 	__be32 *p;
5871 	int status;
5872 
5873 	status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5874 	if (!status)
5875 		status = decode_sessionid(xdr, &res->sessionid);
5876 	if (unlikely(status))
5877 		return status;
5878 
5879 	/* seqid, flags */
5880 	p = xdr_inline_decode(xdr, 8);
5881 	if (unlikely(!p))
5882 		goto out_overflow;
5883 	res->seqid = be32_to_cpup(p++);
5884 	res->flags = be32_to_cpup(p);
5885 
5886 	/* Channel attributes */
5887 	status = decode_chan_attrs(xdr, &res->fc_attrs);
5888 	if (!status)
5889 		status = decode_chan_attrs(xdr, &res->bc_attrs);
5890 	return status;
5891 out_overflow:
5892 	print_overflow_msg(__func__, xdr);
5893 	return -EIO;
5894 }
5895 
decode_destroy_session(struct xdr_stream * xdr,void * dummy)5896 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5897 {
5898 	return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5899 }
5900 
decode_destroy_clientid(struct xdr_stream * xdr,void * dummy)5901 static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5902 {
5903 	return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5904 }
5905 
decode_reclaim_complete(struct xdr_stream * xdr,void * dummy)5906 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5907 {
5908 	return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5909 }
5910 #endif /* CONFIG_NFS_V4_1 */
5911 
decode_sequence(struct xdr_stream * xdr,struct nfs4_sequence_res * res,struct rpc_rqst * rqstp)5912 static int decode_sequence(struct xdr_stream *xdr,
5913 			   struct nfs4_sequence_res *res,
5914 			   struct rpc_rqst *rqstp)
5915 {
5916 #if defined(CONFIG_NFS_V4_1)
5917 	struct nfs4_session *session;
5918 	struct nfs4_sessionid id;
5919 	u32 dummy;
5920 	int status;
5921 	__be32 *p;
5922 
5923 	if (res->sr_slot == NULL)
5924 		return 0;
5925 	if (!res->sr_slot->table->session)
5926 		return 0;
5927 
5928 	status = decode_op_hdr(xdr, OP_SEQUENCE);
5929 	if (!status)
5930 		status = decode_sessionid(xdr, &id);
5931 	if (unlikely(status))
5932 		goto out_err;
5933 
5934 	/*
5935 	 * If the server returns different values for sessionID, slotID or
5936 	 * sequence number, the server is looney tunes.
5937 	 */
5938 	status = -EREMOTEIO;
5939 	session = res->sr_slot->table->session;
5940 
5941 	if (memcmp(id.data, session->sess_id.data,
5942 		   NFS4_MAX_SESSIONID_LEN)) {
5943 		dprintk("%s Invalid session id\n", __func__);
5944 		goto out_err;
5945 	}
5946 
5947 	p = xdr_inline_decode(xdr, 20);
5948 	if (unlikely(!p))
5949 		goto out_overflow;
5950 
5951 	/* seqid */
5952 	dummy = be32_to_cpup(p++);
5953 	if (dummy != res->sr_slot->seq_nr) {
5954 		dprintk("%s Invalid sequence number\n", __func__);
5955 		goto out_err;
5956 	}
5957 	/* slot id */
5958 	dummy = be32_to_cpup(p++);
5959 	if (dummy != res->sr_slot->slot_nr) {
5960 		dprintk("%s Invalid slot id\n", __func__);
5961 		goto out_err;
5962 	}
5963 	/* highest slot id */
5964 	res->sr_highest_slotid = be32_to_cpup(p++);
5965 	/* target highest slot id */
5966 	res->sr_target_highest_slotid = be32_to_cpup(p++);
5967 	/* result flags */
5968 	res->sr_status_flags = be32_to_cpup(p);
5969 	status = 0;
5970 out_err:
5971 	res->sr_status = status;
5972 	return status;
5973 out_overflow:
5974 	print_overflow_msg(__func__, xdr);
5975 	status = -EIO;
5976 	goto out_err;
5977 #else  /* CONFIG_NFS_V4_1 */
5978 	return 0;
5979 #endif /* CONFIG_NFS_V4_1 */
5980 }
5981 
5982 #if defined(CONFIG_NFS_V4_1)
decode_layout_stateid(struct xdr_stream * xdr,nfs4_stateid * stateid)5983 static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5984 {
5985 	stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5986 	return decode_stateid(xdr, stateid);
5987 }
5988 
decode_getdeviceinfo(struct xdr_stream * xdr,struct nfs4_getdeviceinfo_res * res)5989 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5990 				struct nfs4_getdeviceinfo_res *res)
5991 {
5992 	struct pnfs_device *pdev = res->pdev;
5993 	__be32 *p;
5994 	uint32_t len, type;
5995 	int status;
5996 
5997 	status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5998 	if (status) {
5999 		if (status == -ETOOSMALL) {
6000 			p = xdr_inline_decode(xdr, 4);
6001 			if (unlikely(!p))
6002 				goto out_overflow;
6003 			pdev->mincount = be32_to_cpup(p);
6004 			dprintk("%s: Min count too small. mincnt = %u\n",
6005 				__func__, pdev->mincount);
6006 		}
6007 		return status;
6008 	}
6009 
6010 	p = xdr_inline_decode(xdr, 8);
6011 	if (unlikely(!p))
6012 		goto out_overflow;
6013 	type = be32_to_cpup(p++);
6014 	if (type != pdev->layout_type) {
6015 		dprintk("%s: layout mismatch req: %u pdev: %u\n",
6016 			__func__, pdev->layout_type, type);
6017 		return -EINVAL;
6018 	}
6019 	/*
6020 	 * Get the length of the opaque device_addr4. xdr_read_pages places
6021 	 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
6022 	 * and places the remaining xdr data in xdr_buf->tail
6023 	 */
6024 	pdev->mincount = be32_to_cpup(p);
6025 	if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
6026 		goto out_overflow;
6027 
6028 	/* Parse notification bitmap, verifying that it is zero. */
6029 	p = xdr_inline_decode(xdr, 4);
6030 	if (unlikely(!p))
6031 		goto out_overflow;
6032 	len = be32_to_cpup(p);
6033 	if (len) {
6034 		uint32_t i;
6035 
6036 		p = xdr_inline_decode(xdr, 4 * len);
6037 		if (unlikely(!p))
6038 			goto out_overflow;
6039 
6040 		res->notification = be32_to_cpup(p++);
6041 		for (i = 1; i < len; i++) {
6042 			if (be32_to_cpup(p++)) {
6043 				dprintk("%s: unsupported notification\n",
6044 					__func__);
6045 				return -EIO;
6046 			}
6047 		}
6048 	}
6049 	return 0;
6050 out_overflow:
6051 	print_overflow_msg(__func__, xdr);
6052 	return -EIO;
6053 }
6054 
decode_layoutget(struct xdr_stream * xdr,struct rpc_rqst * req,struct nfs4_layoutget_res * res)6055 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6056 			    struct nfs4_layoutget_res *res)
6057 {
6058 	__be32 *p;
6059 	int status;
6060 	u32 layout_count;
6061 	u32 recvd;
6062 
6063 	status = decode_op_hdr(xdr, OP_LAYOUTGET);
6064 	if (status)
6065 		goto out;
6066 	p = xdr_inline_decode(xdr, 4);
6067 	if (unlikely(!p))
6068 		goto out_overflow;
6069 	res->return_on_close = be32_to_cpup(p);
6070 	decode_layout_stateid(xdr, &res->stateid);
6071 	p = xdr_inline_decode(xdr, 4);
6072 	if (unlikely(!p))
6073 		goto out_overflow;
6074 	layout_count = be32_to_cpup(p);
6075 	if (!layout_count) {
6076 		dprintk("%s: server responded with empty layout array\n",
6077 			__func__);
6078 		status = -EINVAL;
6079 		goto out;
6080 	}
6081 
6082 	p = xdr_inline_decode(xdr, 28);
6083 	if (unlikely(!p))
6084 		goto out_overflow;
6085 	p = xdr_decode_hyper(p, &res->range.offset);
6086 	p = xdr_decode_hyper(p, &res->range.length);
6087 	res->range.iomode = be32_to_cpup(p++);
6088 	res->type = be32_to_cpup(p++);
6089 	res->layoutp->len = be32_to_cpup(p);
6090 
6091 	dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
6092 		__func__,
6093 		(unsigned long)res->range.offset,
6094 		(unsigned long)res->range.length,
6095 		res->range.iomode,
6096 		res->type,
6097 		res->layoutp->len);
6098 
6099 	recvd = xdr_read_pages(xdr, res->layoutp->len);
6100 	if (res->layoutp->len > recvd) {
6101 		dprintk("NFS: server cheating in layoutget reply: "
6102 				"layout len %u > recvd %u\n",
6103 				res->layoutp->len, recvd);
6104 		status = -EINVAL;
6105 		goto out;
6106 	}
6107 
6108 	if (layout_count > 1) {
6109 		/* We only handle a length one array at the moment.  Any
6110 		 * further entries are just ignored.  Note that this means
6111 		 * the client may see a response that is less than the
6112 		 * minimum it requested.
6113 		 */
6114 		dprintk("%s: server responded with %d layouts, dropping tail\n",
6115 			__func__, layout_count);
6116 	}
6117 
6118 out:
6119 	res->status = status;
6120 	return status;
6121 out_overflow:
6122 	print_overflow_msg(__func__, xdr);
6123 	status = -EIO;
6124 	goto out;
6125 }
6126 
decode_layoutreturn(struct xdr_stream * xdr,struct nfs4_layoutreturn_res * res)6127 static int decode_layoutreturn(struct xdr_stream *xdr,
6128 			       struct nfs4_layoutreturn_res *res)
6129 {
6130 	__be32 *p;
6131 	int status;
6132 
6133 	status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6134 	if (status)
6135 		return status;
6136 	p = xdr_inline_decode(xdr, 4);
6137 	if (unlikely(!p))
6138 		goto out_overflow;
6139 	res->lrs_present = be32_to_cpup(p);
6140 	if (res->lrs_present)
6141 		status = decode_layout_stateid(xdr, &res->stateid);
6142 	else
6143 		nfs4_stateid_copy(&res->stateid, &invalid_stateid);
6144 	return status;
6145 out_overflow:
6146 	print_overflow_msg(__func__, xdr);
6147 	return -EIO;
6148 }
6149 
decode_layoutcommit(struct xdr_stream * xdr,struct rpc_rqst * req,struct nfs4_layoutcommit_res * res)6150 static int decode_layoutcommit(struct xdr_stream *xdr,
6151 			       struct rpc_rqst *req,
6152 			       struct nfs4_layoutcommit_res *res)
6153 {
6154 	__be32 *p;
6155 	__u32 sizechanged;
6156 	int status;
6157 
6158 	status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6159 	res->status = status;
6160 	if (status)
6161 		return status;
6162 
6163 	p = xdr_inline_decode(xdr, 4);
6164 	if (unlikely(!p))
6165 		goto out_overflow;
6166 	sizechanged = be32_to_cpup(p);
6167 
6168 	if (sizechanged) {
6169 		/* throw away new size */
6170 		p = xdr_inline_decode(xdr, 8);
6171 		if (unlikely(!p))
6172 			goto out_overflow;
6173 	}
6174 	return 0;
6175 out_overflow:
6176 	print_overflow_msg(__func__, xdr);
6177 	return -EIO;
6178 }
6179 
decode_test_stateid(struct xdr_stream * xdr,struct nfs41_test_stateid_res * res)6180 static int decode_test_stateid(struct xdr_stream *xdr,
6181 			       struct nfs41_test_stateid_res *res)
6182 {
6183 	__be32 *p;
6184 	int status;
6185 	int num_res;
6186 
6187 	status = decode_op_hdr(xdr, OP_TEST_STATEID);
6188 	if (status)
6189 		return status;
6190 
6191 	p = xdr_inline_decode(xdr, 4);
6192 	if (unlikely(!p))
6193 		goto out_overflow;
6194 	num_res = be32_to_cpup(p++);
6195 	if (num_res != 1)
6196 		goto out;
6197 
6198 	p = xdr_inline_decode(xdr, 4);
6199 	if (unlikely(!p))
6200 		goto out_overflow;
6201 	res->status = be32_to_cpup(p++);
6202 
6203 	return status;
6204 out_overflow:
6205 	print_overflow_msg(__func__, xdr);
6206 out:
6207 	return -EIO;
6208 }
6209 
decode_free_stateid(struct xdr_stream * xdr,struct nfs41_free_stateid_res * res)6210 static int decode_free_stateid(struct xdr_stream *xdr,
6211 			       struct nfs41_free_stateid_res *res)
6212 {
6213 	res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6214 	return res->status;
6215 }
6216 #else
6217 static inline
decode_layoutreturn(struct xdr_stream * xdr,struct nfs4_layoutreturn_res * res)6218 int decode_layoutreturn(struct xdr_stream *xdr,
6219 			       struct nfs4_layoutreturn_res *res)
6220 {
6221 	return 0;
6222 }
6223 
decode_layoutget(struct xdr_stream * xdr,struct rpc_rqst * req,struct nfs4_layoutget_res * res)6224 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6225 			    struct nfs4_layoutget_res *res)
6226 {
6227 	return 0;
6228 }
6229 
6230 #endif /* CONFIG_NFS_V4_1 */
6231 
6232 /*
6233  * END OF "GENERIC" DECODE ROUTINES.
6234  */
6235 
6236 /*
6237  * Decode OPEN_DOWNGRADE response
6238  */
nfs4_xdr_dec_open_downgrade(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)6239 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6240 				       struct xdr_stream *xdr,
6241 				       void *data)
6242 {
6243 	struct nfs_closeres *res = data;
6244 	struct compound_hdr hdr;
6245 	int status;
6246 
6247 	status = decode_compound_hdr(xdr, &hdr);
6248 	if (status)
6249 		goto out;
6250 	status = decode_sequence(xdr, &res->seq_res, rqstp);
6251 	if (status)
6252 		goto out;
6253 	status = decode_putfh(xdr);
6254 	if (status)
6255 		goto out;
6256 	if (res->lr_res) {
6257 		status = decode_layoutreturn(xdr, res->lr_res);
6258 		res->lr_ret = status;
6259 		if (status)
6260 			goto out;
6261 	}
6262 	status = decode_open_downgrade(xdr, res);
6263 out:
6264 	return status;
6265 }
6266 
6267 /*
6268  * Decode ACCESS response
6269  */
nfs4_xdr_dec_access(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)6270 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6271 			       void *data)
6272 {
6273 	struct nfs4_accessres *res = data;
6274 	struct compound_hdr hdr;
6275 	int status;
6276 
6277 	status = decode_compound_hdr(xdr, &hdr);
6278 	if (status)
6279 		goto out;
6280 	status = decode_sequence(xdr, &res->seq_res, rqstp);
6281 	if (status)
6282 		goto out;
6283 	status = decode_putfh(xdr);
6284 	if (status != 0)
6285 		goto out;
6286 	status = decode_access(xdr, &res->supported, &res->access);
6287 	if (status != 0)
6288 		goto out;
6289 	if (res->fattr)
6290 		decode_getfattr(xdr, res->fattr, res->server);
6291 out:
6292 	return status;
6293 }
6294 
6295 /*
6296  * Decode LOOKUP response
6297  */
nfs4_xdr_dec_lookup(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)6298 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6299 			       void *data)
6300 {
6301 	struct nfs4_lookup_res *res = data;
6302 	struct compound_hdr hdr;
6303 	int status;
6304 
6305 	status = decode_compound_hdr(xdr, &hdr);
6306 	if (status)
6307 		goto out;
6308 	status = decode_sequence(xdr, &res->seq_res, rqstp);
6309 	if (status)
6310 		goto out;
6311 	status = decode_putfh(xdr);
6312 	if (status)
6313 		goto out;
6314 	status = decode_lookup(xdr);
6315 	if (status)
6316 		goto out;
6317 	status = decode_getfh(xdr, res->fh);
6318 	if (status)
6319 		goto out;
6320 	status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6321 out:
6322 	return status;
6323 }
6324 
6325 /*
6326  * Decode LOOKUPP response
6327  */
nfs4_xdr_dec_lookupp(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)6328 static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6329 		void *data)
6330 {
6331 	struct nfs4_lookupp_res *res = data;
6332 	struct compound_hdr hdr;
6333 	int status;
6334 
6335 	status = decode_compound_hdr(xdr, &hdr);
6336 	if (status)
6337 		goto out;
6338 	status = decode_sequence(xdr, &res->seq_res, rqstp);
6339 	if (status)
6340 		goto out;
6341 	status = decode_putfh(xdr);
6342 	if (status)
6343 		goto out;
6344 	status = decode_lookupp(xdr);
6345 	if (status)
6346 		goto out;
6347 	status = decode_getfh(xdr, res->fh);
6348 	if (status)
6349 		goto out;
6350 	status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6351 out:
6352 	return status;
6353 }
6354 
6355 /*
6356  * Decode LOOKUP_ROOT response
6357  */
nfs4_xdr_dec_lookup_root(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)6358 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6359 				    struct xdr_stream *xdr,
6360 				    void *data)
6361 {
6362 	struct nfs4_lookup_res *res = data;
6363 	struct compound_hdr hdr;
6364 	int status;
6365 
6366 	status = decode_compound_hdr(xdr, &hdr);
6367 	if (status)
6368 		goto out;
6369 	status = decode_sequence(xdr, &res->seq_res, rqstp);
6370 	if (status)
6371 		goto out;
6372 	status = decode_putrootfh(xdr);
6373 	if (status)
6374 		goto out;
6375 	status = decode_getfh(xdr, res->fh);
6376 	if (status == 0)
6377 		status = decode_getfattr_label(xdr, res->fattr,
6378 						res->label, res->server);
6379 out:
6380 	return status;
6381 }
6382 
6383 /*
6384  * Decode REMOVE response
6385  */
nfs4_xdr_dec_remove(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)6386 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6387 			       void *data)
6388 {
6389 	struct nfs_removeres *res = data;
6390 	struct compound_hdr hdr;
6391 	int status;
6392 
6393 	status = decode_compound_hdr(xdr, &hdr);
6394 	if (status)
6395 		goto out;
6396 	status = decode_sequence(xdr, &res->seq_res, rqstp);
6397 	if (status)
6398 		goto out;
6399 	status = decode_putfh(xdr);
6400 	if (status)
6401 		goto out;
6402 	status = decode_remove(xdr, &res->cinfo);
6403 out:
6404 	return status;
6405 }
6406 
6407 /*
6408  * Decode RENAME response
6409  */
nfs4_xdr_dec_rename(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)6410 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6411 			       void *data)
6412 {
6413 	struct nfs_renameres *res = data;
6414 	struct compound_hdr hdr;
6415 	int status;
6416 
6417 	status = decode_compound_hdr(xdr, &hdr);
6418 	if (status)
6419 		goto out;
6420 	status = decode_sequence(xdr, &res->seq_res, rqstp);
6421 	if (status)
6422 		goto out;
6423 	status = decode_putfh(xdr);
6424 	if (status)
6425 		goto out;
6426 	status = decode_savefh(xdr);
6427 	if (status)
6428 		goto out;
6429 	status = decode_putfh(xdr);
6430 	if (status)
6431 		goto out;
6432 	status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6433 out:
6434 	return status;
6435 }
6436 
6437 /*
6438  * Decode LINK response
6439  */
nfs4_xdr_dec_link(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)6440 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6441 			     void *data)
6442 {
6443 	struct nfs4_link_res *res = data;
6444 	struct compound_hdr hdr;
6445 	int status;
6446 
6447 	status = decode_compound_hdr(xdr, &hdr);
6448 	if (status)
6449 		goto out;
6450 	status = decode_sequence(xdr, &res->seq_res, rqstp);
6451 	if (status)
6452 		goto out;
6453 	status = decode_putfh(xdr);
6454 	if (status)
6455 		goto out;
6456 	status = decode_savefh(xdr);
6457 	if (status)
6458 		goto out;
6459 	status = decode_putfh(xdr);
6460 	if (status)
6461 		goto out;
6462 	status = decode_link(xdr, &res->cinfo);
6463 	if (status)
6464 		goto out;
6465 	/*
6466 	 * Note order: OP_LINK leaves the directory as the current
6467 	 *             filehandle.
6468 	 */
6469 	status = decode_restorefh(xdr);
6470 	if (status)
6471 		goto out;
6472 	decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6473 out:
6474 	return status;
6475 }
6476 
6477 /*
6478  * Decode CREATE response
6479  */
nfs4_xdr_dec_create(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)6480 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6481 			       void *data)
6482 {
6483 	struct nfs4_create_res *res = data;
6484 	struct compound_hdr hdr;
6485 	int status;
6486 
6487 	status = decode_compound_hdr(xdr, &hdr);
6488 	if (status)
6489 		goto out;
6490 	status = decode_sequence(xdr, &res->seq_res, rqstp);
6491 	if (status)
6492 		goto out;
6493 	status = decode_putfh(xdr);
6494 	if (status)
6495 		goto out;
6496 	status = decode_create(xdr, &res->dir_cinfo);
6497 	if (status)
6498 		goto out;
6499 	status = decode_getfh(xdr, res->fh);
6500 	if (status)
6501 		goto out;
6502 	decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6503 out:
6504 	return status;
6505 }
6506 
6507 /*
6508  * Decode SYMLINK response
6509  */
nfs4_xdr_dec_symlink(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * res)6510 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6511 				void *res)
6512 {
6513 	return nfs4_xdr_dec_create(rqstp, xdr, res);
6514 }
6515 
6516 /*
6517  * Decode GETATTR response
6518  */
nfs4_xdr_dec_getattr(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)6519 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6520 				void *data)
6521 {
6522 	struct nfs4_getattr_res *res = data;
6523 	struct compound_hdr hdr;
6524 	int status;
6525 
6526 	status = decode_compound_hdr(xdr, &hdr);
6527 	if (status)
6528 		goto out;
6529 	status = decode_sequence(xdr, &res->seq_res, rqstp);
6530 	if (status)
6531 		goto out;
6532 	status = decode_putfh(xdr);
6533 	if (status)
6534 		goto out;
6535 	status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6536 out:
6537 	return status;
6538 }
6539 
6540 /*
6541  * Encode an SETACL request
6542  */
nfs4_xdr_enc_setacl(struct rpc_rqst * req,struct xdr_stream * xdr,const void * data)6543 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6544 				const void *data)
6545 {
6546 	const struct nfs_setaclargs *args = data;
6547 	struct compound_hdr hdr = {
6548 		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
6549 	};
6550 
6551 	encode_compound_hdr(xdr, req, &hdr);
6552 	encode_sequence(xdr, &args->seq_args, &hdr);
6553 	encode_putfh(xdr, args->fh, &hdr);
6554 	encode_setacl(xdr, args, &hdr);
6555 	encode_nops(&hdr);
6556 }
6557 
6558 /*
6559  * Decode SETACL response
6560  */
6561 static int
nfs4_xdr_dec_setacl(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)6562 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6563 		    void *data)
6564 {
6565 	struct nfs_setaclres *res = data;
6566 	struct compound_hdr hdr;
6567 	int status;
6568 
6569 	status = decode_compound_hdr(xdr, &hdr);
6570 	if (status)
6571 		goto out;
6572 	status = decode_sequence(xdr, &res->seq_res, rqstp);
6573 	if (status)
6574 		goto out;
6575 	status = decode_putfh(xdr);
6576 	if (status)
6577 		goto out;
6578 	status = decode_setattr(xdr);
6579 out:
6580 	return status;
6581 }
6582 
6583 /*
6584  * Decode GETACL response
6585  */
6586 static int
nfs4_xdr_dec_getacl(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)6587 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6588 		    void *data)
6589 {
6590 	struct nfs_getaclres *res = data;
6591 	struct compound_hdr hdr;
6592 	int status;
6593 
6594 	if (res->acl_scratch != NULL) {
6595 		void *p = page_address(res->acl_scratch);
6596 		xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6597 	}
6598 	status = decode_compound_hdr(xdr, &hdr);
6599 	if (status)
6600 		goto out;
6601 	status = decode_sequence(xdr, &res->seq_res, rqstp);
6602 	if (status)
6603 		goto out;
6604 	status = decode_putfh(xdr);
6605 	if (status)
6606 		goto out;
6607 	status = decode_getacl(xdr, rqstp, res);
6608 
6609 out:
6610 	return status;
6611 }
6612 
6613 /*
6614  * Decode CLOSE response
6615  */
nfs4_xdr_dec_close(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)6616 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6617 			      void *data)
6618 {
6619 	struct nfs_closeres *res = data;
6620 	struct compound_hdr hdr;
6621 	int status;
6622 
6623 	status = decode_compound_hdr(xdr, &hdr);
6624 	if (status)
6625 		goto out;
6626 	status = decode_sequence(xdr, &res->seq_res, rqstp);
6627 	if (status)
6628 		goto out;
6629 	status = decode_putfh(xdr);
6630 	if (status)
6631 		goto out;
6632 	if (res->lr_res) {
6633 		status = decode_layoutreturn(xdr, res->lr_res);
6634 		res->lr_ret = status;
6635 		if (status)
6636 			goto out;
6637 	}
6638 	if (res->fattr != NULL) {
6639 		status = decode_getfattr(xdr, res->fattr, res->server);
6640 		if (status != 0)
6641 			goto out;
6642 	}
6643 	status = decode_close(xdr, res);
6644 out:
6645 	return status;
6646 }
6647 
6648 /*
6649  * Decode OPEN response
6650  */
nfs4_xdr_dec_open(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)6651 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6652 			     void *data)
6653 {
6654 	struct nfs_openres *res = data;
6655 	struct compound_hdr hdr;
6656 	int status;
6657 
6658 	status = decode_compound_hdr(xdr, &hdr);
6659 	if (status)
6660 		goto out;
6661 	status = decode_sequence(xdr, &res->seq_res, rqstp);
6662 	if (status)
6663 		goto out;
6664 	status = decode_putfh(xdr);
6665 	if (status)
6666 		goto out;
6667 	status = decode_open(xdr, res);
6668 	if (status)
6669 		goto out;
6670 	status = decode_getfh(xdr, &res->fh);
6671 	if (status)
6672 		goto out;
6673 	if (res->access_request)
6674 		decode_access(xdr, &res->access_supported, &res->access_result);
6675 	decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6676 	if (res->lg_res)
6677 		decode_layoutget(xdr, rqstp, res->lg_res);
6678 out:
6679 	return status;
6680 }
6681 
6682 /*
6683  * Decode OPEN_CONFIRM response
6684  */
nfs4_xdr_dec_open_confirm(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)6685 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6686 				     struct xdr_stream *xdr,
6687 				     void *data)
6688 {
6689 	struct nfs_open_confirmres *res = data;
6690 	struct compound_hdr hdr;
6691 	int status;
6692 
6693 	status = decode_compound_hdr(xdr, &hdr);
6694 	if (status)
6695 		goto out;
6696 	status = decode_putfh(xdr);
6697 	if (status)
6698 		goto out;
6699 	status = decode_open_confirm(xdr, res);
6700 out:
6701 	return status;
6702 }
6703 
6704 /*
6705  * Decode OPEN response
6706  */
nfs4_xdr_dec_open_noattr(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)6707 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6708 				    struct xdr_stream *xdr,
6709 				    void *data)
6710 {
6711 	struct nfs_openres *res = data;
6712 	struct compound_hdr hdr;
6713 	int status;
6714 
6715 	status = decode_compound_hdr(xdr, &hdr);
6716 	if (status)
6717 		goto out;
6718 	status = decode_sequence(xdr, &res->seq_res, rqstp);
6719 	if (status)
6720 		goto out;
6721 	status = decode_putfh(xdr);
6722 	if (status)
6723 		goto out;
6724 	status = decode_open(xdr, res);
6725 	if (status)
6726 		goto out;
6727 	if (res->access_request)
6728 		decode_access(xdr, &res->access_supported, &res->access_result);
6729 	decode_getfattr(xdr, res->f_attr, res->server);
6730 	if (res->lg_res)
6731 		decode_layoutget(xdr, rqstp, res->lg_res);
6732 out:
6733 	return status;
6734 }
6735 
6736 /*
6737  * Decode SETATTR response
6738  */
nfs4_xdr_dec_setattr(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)6739 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6740 				struct xdr_stream *xdr,
6741 				void *data)
6742 {
6743 	struct nfs_setattrres *res = data;
6744 	struct compound_hdr hdr;
6745 	int status;
6746 
6747 	status = decode_compound_hdr(xdr, &hdr);
6748 	if (status)
6749 		goto out;
6750 	status = decode_sequence(xdr, &res->seq_res, rqstp);
6751 	if (status)
6752 		goto out;
6753 	status = decode_putfh(xdr);
6754 	if (status)
6755 		goto out;
6756 	status = decode_setattr(xdr);
6757 	if (status)
6758 		goto out;
6759 	decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6760 out:
6761 	return status;
6762 }
6763 
6764 /*
6765  * Decode LOCK response
6766  */
nfs4_xdr_dec_lock(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)6767 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6768 			     void *data)
6769 {
6770 	struct nfs_lock_res *res = data;
6771 	struct compound_hdr hdr;
6772 	int status;
6773 
6774 	status = decode_compound_hdr(xdr, &hdr);
6775 	if (status)
6776 		goto out;
6777 	status = decode_sequence(xdr, &res->seq_res, rqstp);
6778 	if (status)
6779 		goto out;
6780 	status = decode_putfh(xdr);
6781 	if (status)
6782 		goto out;
6783 	status = decode_lock(xdr, res);
6784 out:
6785 	return status;
6786 }
6787 
6788 /*
6789  * Decode LOCKT response
6790  */
nfs4_xdr_dec_lockt(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)6791 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6792 			      void *data)
6793 {
6794 	struct nfs_lockt_res *res = data;
6795 	struct compound_hdr hdr;
6796 	int status;
6797 
6798 	status = decode_compound_hdr(xdr, &hdr);
6799 	if (status)
6800 		goto out;
6801 	status = decode_sequence(xdr, &res->seq_res, rqstp);
6802 	if (status)
6803 		goto out;
6804 	status = decode_putfh(xdr);
6805 	if (status)
6806 		goto out;
6807 	status = decode_lockt(xdr, res);
6808 out:
6809 	return status;
6810 }
6811 
6812 /*
6813  * Decode LOCKU response
6814  */
nfs4_xdr_dec_locku(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)6815 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6816 			      void *data)
6817 {
6818 	struct nfs_locku_res *res = data;
6819 	struct compound_hdr hdr;
6820 	int status;
6821 
6822 	status = decode_compound_hdr(xdr, &hdr);
6823 	if (status)
6824 		goto out;
6825 	status = decode_sequence(xdr, &res->seq_res, rqstp);
6826 	if (status)
6827 		goto out;
6828 	status = decode_putfh(xdr);
6829 	if (status)
6830 		goto out;
6831 	status = decode_locku(xdr, res);
6832 out:
6833 	return status;
6834 }
6835 
nfs4_xdr_dec_release_lockowner(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * dummy)6836 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6837 					  struct xdr_stream *xdr, void *dummy)
6838 {
6839 	struct compound_hdr hdr;
6840 	int status;
6841 
6842 	status = decode_compound_hdr(xdr, &hdr);
6843 	if (!status)
6844 		status = decode_release_lockowner(xdr);
6845 	return status;
6846 }
6847 
6848 /*
6849  * Decode READLINK response
6850  */
nfs4_xdr_dec_readlink(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)6851 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6852 				 struct xdr_stream *xdr,
6853 				 void *data)
6854 {
6855 	struct nfs4_readlink_res *res = data;
6856 	struct compound_hdr hdr;
6857 	int status;
6858 
6859 	status = decode_compound_hdr(xdr, &hdr);
6860 	if (status)
6861 		goto out;
6862 	status = decode_sequence(xdr, &res->seq_res, rqstp);
6863 	if (status)
6864 		goto out;
6865 	status = decode_putfh(xdr);
6866 	if (status)
6867 		goto out;
6868 	status = decode_readlink(xdr, rqstp);
6869 out:
6870 	return status;
6871 }
6872 
6873 /*
6874  * Decode READDIR response
6875  */
nfs4_xdr_dec_readdir(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)6876 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6877 				void *data)
6878 {
6879 	struct nfs4_readdir_res *res = data;
6880 	struct compound_hdr hdr;
6881 	int status;
6882 
6883 	status = decode_compound_hdr(xdr, &hdr);
6884 	if (status)
6885 		goto out;
6886 	status = decode_sequence(xdr, &res->seq_res, rqstp);
6887 	if (status)
6888 		goto out;
6889 	status = decode_putfh(xdr);
6890 	if (status)
6891 		goto out;
6892 	status = decode_readdir(xdr, rqstp, res);
6893 out:
6894 	return status;
6895 }
6896 
6897 /*
6898  * Decode Read response
6899  */
nfs4_xdr_dec_read(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)6900 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6901 			     void *data)
6902 {
6903 	struct nfs_pgio_res *res = data;
6904 	struct compound_hdr hdr;
6905 	int status;
6906 
6907 	status = decode_compound_hdr(xdr, &hdr);
6908 	res->op_status = hdr.status;
6909 	if (status)
6910 		goto out;
6911 	status = decode_sequence(xdr, &res->seq_res, rqstp);
6912 	if (status)
6913 		goto out;
6914 	status = decode_putfh(xdr);
6915 	if (status)
6916 		goto out;
6917 	status = decode_read(xdr, rqstp, res);
6918 	if (!status)
6919 		status = res->count;
6920 out:
6921 	return status;
6922 }
6923 
6924 /*
6925  * Decode WRITE response
6926  */
nfs4_xdr_dec_write(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)6927 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6928 			      void *data)
6929 {
6930 	struct nfs_pgio_res *res = data;
6931 	struct compound_hdr hdr;
6932 	int status;
6933 
6934 	status = decode_compound_hdr(xdr, &hdr);
6935 	res->op_status = hdr.status;
6936 	if (status)
6937 		goto out;
6938 	status = decode_sequence(xdr, &res->seq_res, rqstp);
6939 	if (status)
6940 		goto out;
6941 	status = decode_putfh(xdr);
6942 	if (status)
6943 		goto out;
6944 	status = decode_write(xdr, res);
6945 	if (status)
6946 		goto out;
6947 	if (res->fattr)
6948 		decode_getfattr(xdr, res->fattr, res->server);
6949 	if (!status)
6950 		status = res->count;
6951 out:
6952 	return status;
6953 }
6954 
6955 /*
6956  * Decode COMMIT response
6957  */
nfs4_xdr_dec_commit(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)6958 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6959 			       void *data)
6960 {
6961 	struct nfs_commitres *res = data;
6962 	struct compound_hdr hdr;
6963 	int status;
6964 
6965 	status = decode_compound_hdr(xdr, &hdr);
6966 	res->op_status = hdr.status;
6967 	if (status)
6968 		goto out;
6969 	status = decode_sequence(xdr, &res->seq_res, rqstp);
6970 	if (status)
6971 		goto out;
6972 	status = decode_putfh(xdr);
6973 	if (status)
6974 		goto out;
6975 	status = decode_commit(xdr, res);
6976 out:
6977 	return status;
6978 }
6979 
6980 /*
6981  * Decode FSINFO response
6982  */
nfs4_xdr_dec_fsinfo(struct rpc_rqst * req,struct xdr_stream * xdr,void * data)6983 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6984 			       void *data)
6985 {
6986 	struct nfs4_fsinfo_res *res = data;
6987 	struct compound_hdr hdr;
6988 	int status;
6989 
6990 	status = decode_compound_hdr(xdr, &hdr);
6991 	if (!status)
6992 		status = decode_sequence(xdr, &res->seq_res, req);
6993 	if (!status)
6994 		status = decode_putfh(xdr);
6995 	if (!status)
6996 		status = decode_fsinfo(xdr, res->fsinfo);
6997 	return status;
6998 }
6999 
7000 /*
7001  * Decode PATHCONF response
7002  */
nfs4_xdr_dec_pathconf(struct rpc_rqst * req,struct xdr_stream * xdr,void * data)7003 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
7004 				 void *data)
7005 {
7006 	struct nfs4_pathconf_res *res = data;
7007 	struct compound_hdr hdr;
7008 	int status;
7009 
7010 	status = decode_compound_hdr(xdr, &hdr);
7011 	if (!status)
7012 		status = decode_sequence(xdr, &res->seq_res, req);
7013 	if (!status)
7014 		status = decode_putfh(xdr);
7015 	if (!status)
7016 		status = decode_pathconf(xdr, res->pathconf);
7017 	return status;
7018 }
7019 
7020 /*
7021  * Decode STATFS response
7022  */
nfs4_xdr_dec_statfs(struct rpc_rqst * req,struct xdr_stream * xdr,void * data)7023 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
7024 			       void *data)
7025 {
7026 	struct nfs4_statfs_res *res = data;
7027 	struct compound_hdr hdr;
7028 	int status;
7029 
7030 	status = decode_compound_hdr(xdr, &hdr);
7031 	if (!status)
7032 		status = decode_sequence(xdr, &res->seq_res, req);
7033 	if (!status)
7034 		status = decode_putfh(xdr);
7035 	if (!status)
7036 		status = decode_statfs(xdr, res->fsstat);
7037 	return status;
7038 }
7039 
7040 /*
7041  * Decode GETATTR_BITMAP response
7042  */
nfs4_xdr_dec_server_caps(struct rpc_rqst * req,struct xdr_stream * xdr,void * data)7043 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
7044 				    struct xdr_stream *xdr,
7045 				    void *data)
7046 {
7047 	struct nfs4_server_caps_res *res = data;
7048 	struct compound_hdr hdr;
7049 	int status;
7050 
7051 	status = decode_compound_hdr(xdr, &hdr);
7052 	if (status)
7053 		goto out;
7054 	status = decode_sequence(xdr, &res->seq_res, req);
7055 	if (status)
7056 		goto out;
7057 	status = decode_putfh(xdr);
7058 	if (status)
7059 		goto out;
7060 	status = decode_server_caps(xdr, res);
7061 out:
7062 	return status;
7063 }
7064 
7065 /*
7066  * Decode RENEW response
7067  */
nfs4_xdr_dec_renew(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * __unused)7068 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
7069 			      void *__unused)
7070 {
7071 	struct compound_hdr hdr;
7072 	int status;
7073 
7074 	status = decode_compound_hdr(xdr, &hdr);
7075 	if (!status)
7076 		status = decode_renew(xdr);
7077 	return status;
7078 }
7079 
7080 /*
7081  * Decode SETCLIENTID response
7082  */
nfs4_xdr_dec_setclientid(struct rpc_rqst * req,struct xdr_stream * xdr,void * data)7083 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
7084 				    struct xdr_stream *xdr,
7085 				    void *data)
7086 {
7087 	struct nfs4_setclientid_res *res = data;
7088 	struct compound_hdr hdr;
7089 	int status;
7090 
7091 	status = decode_compound_hdr(xdr, &hdr);
7092 	if (!status)
7093 		status = decode_setclientid(xdr, res);
7094 	return status;
7095 }
7096 
7097 /*
7098  * Decode SETCLIENTID_CONFIRM response
7099  */
nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst * req,struct xdr_stream * xdr,void * data)7100 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
7101 					    struct xdr_stream *xdr,
7102 					    void *data)
7103 {
7104 	struct compound_hdr hdr;
7105 	int status;
7106 
7107 	status = decode_compound_hdr(xdr, &hdr);
7108 	if (!status)
7109 		status = decode_setclientid_confirm(xdr);
7110 	return status;
7111 }
7112 
7113 /*
7114  * Decode DELEGRETURN response
7115  */
nfs4_xdr_dec_delegreturn(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)7116 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
7117 				    struct xdr_stream *xdr,
7118 				    void *data)
7119 {
7120 	struct nfs4_delegreturnres *res = data;
7121 	struct compound_hdr hdr;
7122 	int status;
7123 
7124 	status = decode_compound_hdr(xdr, &hdr);
7125 	if (status)
7126 		goto out;
7127 	status = decode_sequence(xdr, &res->seq_res, rqstp);
7128 	if (status)
7129 		goto out;
7130 	status = decode_putfh(xdr);
7131 	if (status != 0)
7132 		goto out;
7133 	if (res->lr_res) {
7134 		status = decode_layoutreturn(xdr, res->lr_res);
7135 		res->lr_ret = status;
7136 		if (status)
7137 			goto out;
7138 	}
7139 	if (res->fattr) {
7140 		status = decode_getfattr(xdr, res->fattr, res->server);
7141 		if (status != 0)
7142 			goto out;
7143 	}
7144 	status = decode_delegreturn(xdr);
7145 out:
7146 	return status;
7147 }
7148 
7149 /*
7150  * Decode FS_LOCATIONS response
7151  */
nfs4_xdr_dec_fs_locations(struct rpc_rqst * req,struct xdr_stream * xdr,void * data)7152 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
7153 				     struct xdr_stream *xdr,
7154 				     void *data)
7155 {
7156 	struct nfs4_fs_locations_res *res = data;
7157 	struct compound_hdr hdr;
7158 	int status;
7159 
7160 	status = decode_compound_hdr(xdr, &hdr);
7161 	if (status)
7162 		goto out;
7163 	status = decode_sequence(xdr, &res->seq_res, req);
7164 	if (status)
7165 		goto out;
7166 	status = decode_putfh(xdr);
7167 	if (status)
7168 		goto out;
7169 	if (res->migration) {
7170 		xdr_enter_page(xdr, PAGE_SIZE);
7171 		status = decode_getfattr_generic(xdr,
7172 					&res->fs_locations->fattr,
7173 					 NULL, res->fs_locations,
7174 					 NULL, res->fs_locations->server);
7175 		if (status)
7176 			goto out;
7177 		if (res->renew)
7178 			status = decode_renew(xdr);
7179 	} else {
7180 		status = decode_lookup(xdr);
7181 		if (status)
7182 			goto out;
7183 		xdr_enter_page(xdr, PAGE_SIZE);
7184 		status = decode_getfattr_generic(xdr,
7185 					&res->fs_locations->fattr,
7186 					 NULL, res->fs_locations,
7187 					 NULL, res->fs_locations->server);
7188 	}
7189 out:
7190 	return status;
7191 }
7192 
7193 /*
7194  * Decode SECINFO response
7195  */
nfs4_xdr_dec_secinfo(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)7196 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7197 				struct xdr_stream *xdr,
7198 				void *data)
7199 {
7200 	struct nfs4_secinfo_res *res = data;
7201 	struct compound_hdr hdr;
7202 	int status;
7203 
7204 	status = decode_compound_hdr(xdr, &hdr);
7205 	if (status)
7206 		goto out;
7207 	status = decode_sequence(xdr, &res->seq_res, rqstp);
7208 	if (status)
7209 		goto out;
7210 	status = decode_putfh(xdr);
7211 	if (status)
7212 		goto out;
7213 	status = decode_secinfo(xdr, res);
7214 out:
7215 	return status;
7216 }
7217 
7218 /*
7219  * Decode FSID_PRESENT response
7220  */
nfs4_xdr_dec_fsid_present(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)7221 static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7222 				     struct xdr_stream *xdr,
7223 				     void *data)
7224 {
7225 	struct nfs4_fsid_present_res *res = data;
7226 	struct compound_hdr hdr;
7227 	int status;
7228 
7229 	status = decode_compound_hdr(xdr, &hdr);
7230 	if (status)
7231 		goto out;
7232 	status = decode_sequence(xdr, &res->seq_res, rqstp);
7233 	if (status)
7234 		goto out;
7235 	status = decode_putfh(xdr);
7236 	if (status)
7237 		goto out;
7238 	status = decode_getfh(xdr, res->fh);
7239 	if (status)
7240 		goto out;
7241 	if (res->renew)
7242 		status = decode_renew(xdr);
7243 out:
7244 	return status;
7245 }
7246 
7247 #if defined(CONFIG_NFS_V4_1)
7248 /*
7249  * Decode BIND_CONN_TO_SESSION response
7250  */
nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * res)7251 static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7252 					struct xdr_stream *xdr,
7253 					void *res)
7254 {
7255 	struct compound_hdr hdr;
7256 	int status;
7257 
7258 	status = decode_compound_hdr(xdr, &hdr);
7259 	if (!status)
7260 		status = decode_bind_conn_to_session(xdr, res);
7261 	return status;
7262 }
7263 
7264 /*
7265  * Decode EXCHANGE_ID response
7266  */
nfs4_xdr_dec_exchange_id(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * res)7267 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7268 				    struct xdr_stream *xdr,
7269 				    void *res)
7270 {
7271 	struct compound_hdr hdr;
7272 	int status;
7273 
7274 	status = decode_compound_hdr(xdr, &hdr);
7275 	if (!status)
7276 		status = decode_exchange_id(xdr, res);
7277 	return status;
7278 }
7279 
7280 /*
7281  * Decode CREATE_SESSION response
7282  */
nfs4_xdr_dec_create_session(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * res)7283 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7284 				       struct xdr_stream *xdr,
7285 				       void *res)
7286 {
7287 	struct compound_hdr hdr;
7288 	int status;
7289 
7290 	status = decode_compound_hdr(xdr, &hdr);
7291 	if (!status)
7292 		status = decode_create_session(xdr, res);
7293 	return status;
7294 }
7295 
7296 /*
7297  * Decode DESTROY_SESSION response
7298  */
nfs4_xdr_dec_destroy_session(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * res)7299 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7300 					struct xdr_stream *xdr,
7301 					void *res)
7302 {
7303 	struct compound_hdr hdr;
7304 	int status;
7305 
7306 	status = decode_compound_hdr(xdr, &hdr);
7307 	if (!status)
7308 		status = decode_destroy_session(xdr, res);
7309 	return status;
7310 }
7311 
7312 /*
7313  * Decode DESTROY_CLIENTID response
7314  */
nfs4_xdr_dec_destroy_clientid(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * res)7315 static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7316 					struct xdr_stream *xdr,
7317 					void *res)
7318 {
7319 	struct compound_hdr hdr;
7320 	int status;
7321 
7322 	status = decode_compound_hdr(xdr, &hdr);
7323 	if (!status)
7324 		status = decode_destroy_clientid(xdr, res);
7325 	return status;
7326 }
7327 
7328 /*
7329  * Decode SEQUENCE response
7330  */
nfs4_xdr_dec_sequence(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * res)7331 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7332 				 struct xdr_stream *xdr,
7333 				 void *res)
7334 {
7335 	struct compound_hdr hdr;
7336 	int status;
7337 
7338 	status = decode_compound_hdr(xdr, &hdr);
7339 	if (!status)
7340 		status = decode_sequence(xdr, res, rqstp);
7341 	return status;
7342 }
7343 
7344 /*
7345  * Decode GET_LEASE_TIME response
7346  */
nfs4_xdr_dec_get_lease_time(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)7347 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7348 				       struct xdr_stream *xdr,
7349 				       void *data)
7350 {
7351 	struct nfs4_get_lease_time_res *res = data;
7352 	struct compound_hdr hdr;
7353 	int status;
7354 
7355 	status = decode_compound_hdr(xdr, &hdr);
7356 	if (!status)
7357 		status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7358 	if (!status)
7359 		status = decode_putrootfh(xdr);
7360 	if (!status)
7361 		status = decode_fsinfo(xdr, res->lr_fsinfo);
7362 	return status;
7363 }
7364 
7365 /*
7366  * Decode RECLAIM_COMPLETE response
7367  */
nfs4_xdr_dec_reclaim_complete(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)7368 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7369 					 struct xdr_stream *xdr,
7370 					 void *data)
7371 {
7372 	struct nfs41_reclaim_complete_res *res = data;
7373 	struct compound_hdr hdr;
7374 	int status;
7375 
7376 	status = decode_compound_hdr(xdr, &hdr);
7377 	if (!status)
7378 		status = decode_sequence(xdr, &res->seq_res, rqstp);
7379 	if (!status)
7380 		status = decode_reclaim_complete(xdr, NULL);
7381 	return status;
7382 }
7383 
7384 /*
7385  * Decode GETDEVINFO response
7386  */
nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)7387 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7388 				      struct xdr_stream *xdr,
7389 				      void *data)
7390 {
7391 	struct nfs4_getdeviceinfo_res *res = data;
7392 	struct compound_hdr hdr;
7393 	int status;
7394 
7395 	status = decode_compound_hdr(xdr, &hdr);
7396 	if (status != 0)
7397 		goto out;
7398 	status = decode_sequence(xdr, &res->seq_res, rqstp);
7399 	if (status != 0)
7400 		goto out;
7401 	status = decode_getdeviceinfo(xdr, res);
7402 out:
7403 	return status;
7404 }
7405 
7406 /*
7407  * Decode LAYOUTGET response
7408  */
nfs4_xdr_dec_layoutget(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)7409 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7410 				  struct xdr_stream *xdr,
7411 				  void *data)
7412 {
7413 	struct nfs4_layoutget_res *res = data;
7414 	struct compound_hdr hdr;
7415 	int status;
7416 
7417 	status = decode_compound_hdr(xdr, &hdr);
7418 	if (status)
7419 		goto out;
7420 	status = decode_sequence(xdr, &res->seq_res, rqstp);
7421 	if (status)
7422 		goto out;
7423 	status = decode_putfh(xdr);
7424 	if (status)
7425 		goto out;
7426 	status = decode_layoutget(xdr, rqstp, res);
7427 out:
7428 	return status;
7429 }
7430 
7431 /*
7432  * Decode LAYOUTRETURN response
7433  */
nfs4_xdr_dec_layoutreturn(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)7434 static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7435 				     struct xdr_stream *xdr,
7436 				     void *data)
7437 {
7438 	struct nfs4_layoutreturn_res *res = data;
7439 	struct compound_hdr hdr;
7440 	int status;
7441 
7442 	status = decode_compound_hdr(xdr, &hdr);
7443 	if (status)
7444 		goto out;
7445 	status = decode_sequence(xdr, &res->seq_res, rqstp);
7446 	if (status)
7447 		goto out;
7448 	status = decode_putfh(xdr);
7449 	if (status)
7450 		goto out;
7451 	status = decode_layoutreturn(xdr, res);
7452 out:
7453 	return status;
7454 }
7455 
7456 /*
7457  * Decode LAYOUTCOMMIT response
7458  */
nfs4_xdr_dec_layoutcommit(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)7459 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7460 				     struct xdr_stream *xdr,
7461 				     void *data)
7462 {
7463 	struct nfs4_layoutcommit_res *res = data;
7464 	struct compound_hdr hdr;
7465 	int status;
7466 
7467 	status = decode_compound_hdr(xdr, &hdr);
7468 	if (status)
7469 		goto out;
7470 	status = decode_sequence(xdr, &res->seq_res, rqstp);
7471 	if (status)
7472 		goto out;
7473 	status = decode_putfh(xdr);
7474 	if (status)
7475 		goto out;
7476 	status = decode_layoutcommit(xdr, rqstp, res);
7477 	if (status)
7478 		goto out;
7479 	decode_getfattr(xdr, res->fattr, res->server);
7480 out:
7481 	return status;
7482 }
7483 
7484 /*
7485  * Decode SECINFO_NO_NAME response
7486  */
nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)7487 static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7488 					struct xdr_stream *xdr,
7489 					void *data)
7490 {
7491 	struct nfs4_secinfo_res *res = data;
7492 	struct compound_hdr hdr;
7493 	int status;
7494 
7495 	status = decode_compound_hdr(xdr, &hdr);
7496 	if (status)
7497 		goto out;
7498 	status = decode_sequence(xdr, &res->seq_res, rqstp);
7499 	if (status)
7500 		goto out;
7501 	status = decode_putrootfh(xdr);
7502 	if (status)
7503 		goto out;
7504 	status = decode_secinfo_no_name(xdr, res);
7505 out:
7506 	return status;
7507 }
7508 
7509 /*
7510  * Decode TEST_STATEID response
7511  */
nfs4_xdr_dec_test_stateid(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)7512 static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7513 				     struct xdr_stream *xdr,
7514 				     void *data)
7515 {
7516 	struct nfs41_test_stateid_res *res = data;
7517 	struct compound_hdr hdr;
7518 	int status;
7519 
7520 	status = decode_compound_hdr(xdr, &hdr);
7521 	if (status)
7522 		goto out;
7523 	status = decode_sequence(xdr, &res->seq_res, rqstp);
7524 	if (status)
7525 		goto out;
7526 	status = decode_test_stateid(xdr, res);
7527 out:
7528 	return status;
7529 }
7530 
7531 /*
7532  * Decode FREE_STATEID response
7533  */
nfs4_xdr_dec_free_stateid(struct rpc_rqst * rqstp,struct xdr_stream * xdr,void * data)7534 static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7535 				     struct xdr_stream *xdr,
7536 				     void *data)
7537 {
7538 	struct nfs41_free_stateid_res *res = data;
7539 	struct compound_hdr hdr;
7540 	int status;
7541 
7542 	status = decode_compound_hdr(xdr, &hdr);
7543 	if (status)
7544 		goto out;
7545 	status = decode_sequence(xdr, &res->seq_res, rqstp);
7546 	if (status)
7547 		goto out;
7548 	status = decode_free_stateid(xdr, res);
7549 out:
7550 	return status;
7551 }
7552 #endif /* CONFIG_NFS_V4_1 */
7553 
7554 /**
7555  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7556  *                      the local page cache.
7557  * @xdr: XDR stream where entry resides
7558  * @entry: buffer to fill in with entry data
7559  * @plus: boolean indicating whether this should be a readdirplus entry
7560  *
7561  * Returns zero if successful, otherwise a negative errno value is
7562  * returned.
7563  *
7564  * This function is not invoked during READDIR reply decoding, but
7565  * rather whenever an application invokes the getdents(2) system call
7566  * on a directory already in our cache.
7567  */
nfs4_decode_dirent(struct xdr_stream * xdr,struct nfs_entry * entry,bool plus)7568 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7569 		       bool plus)
7570 {
7571 	unsigned int savep;
7572 	uint32_t bitmap[3] = {0};
7573 	uint32_t len;
7574 	uint64_t new_cookie;
7575 	__be32 *p = xdr_inline_decode(xdr, 4);
7576 	if (unlikely(!p))
7577 		goto out_overflow;
7578 	if (*p == xdr_zero) {
7579 		p = xdr_inline_decode(xdr, 4);
7580 		if (unlikely(!p))
7581 			goto out_overflow;
7582 		if (*p == xdr_zero)
7583 			return -EAGAIN;
7584 		entry->eof = 1;
7585 		return -EBADCOOKIE;
7586 	}
7587 
7588 	p = xdr_inline_decode(xdr, 12);
7589 	if (unlikely(!p))
7590 		goto out_overflow;
7591 	p = xdr_decode_hyper(p, &new_cookie);
7592 	entry->len = be32_to_cpup(p);
7593 
7594 	p = xdr_inline_decode(xdr, entry->len);
7595 	if (unlikely(!p))
7596 		goto out_overflow;
7597 	entry->name = (const char *) p;
7598 
7599 	/*
7600 	 * In case the server doesn't return an inode number,
7601 	 * we fake one here.  (We don't use inode number 0,
7602 	 * since glibc seems to choke on it...)
7603 	 */
7604 	entry->ino = 1;
7605 	entry->fattr->valid = 0;
7606 
7607 	if (decode_attr_bitmap(xdr, bitmap) < 0)
7608 		goto out_overflow;
7609 
7610 	if (decode_attr_length(xdr, &len, &savep) < 0)
7611 		goto out_overflow;
7612 
7613 	if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7614 			NULL, entry->label, entry->server) < 0)
7615 		goto out_overflow;
7616 	if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7617 		entry->ino = entry->fattr->mounted_on_fileid;
7618 	else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7619 		entry->ino = entry->fattr->fileid;
7620 
7621 	entry->d_type = DT_UNKNOWN;
7622 	if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7623 		entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7624 
7625 	entry->prev_cookie = entry->cookie;
7626 	entry->cookie = new_cookie;
7627 
7628 	return 0;
7629 
7630 out_overflow:
7631 	print_overflow_msg(__func__, xdr);
7632 	return -EAGAIN;
7633 }
7634 
7635 /*
7636  * We need to translate between nfs status return values and
7637  * the local errno values which may not be the same.
7638  */
7639 static struct {
7640 	int stat;
7641 	int errno;
7642 } nfs_errtbl[] = {
7643 	{ NFS4_OK,		0		},
7644 	{ NFS4ERR_PERM,		-EPERM		},
7645 	{ NFS4ERR_NOENT,	-ENOENT		},
7646 	{ NFS4ERR_IO,		-errno_NFSERR_IO},
7647 	{ NFS4ERR_NXIO,		-ENXIO		},
7648 	{ NFS4ERR_ACCESS,	-EACCES		},
7649 	{ NFS4ERR_EXIST,	-EEXIST		},
7650 	{ NFS4ERR_XDEV,		-EXDEV		},
7651 	{ NFS4ERR_NOTDIR,	-ENOTDIR	},
7652 	{ NFS4ERR_ISDIR,	-EISDIR		},
7653 	{ NFS4ERR_INVAL,	-EINVAL		},
7654 	{ NFS4ERR_FBIG,		-EFBIG		},
7655 	{ NFS4ERR_NOSPC,	-ENOSPC		},
7656 	{ NFS4ERR_ROFS,		-EROFS		},
7657 	{ NFS4ERR_MLINK,	-EMLINK		},
7658 	{ NFS4ERR_NAMETOOLONG,	-ENAMETOOLONG	},
7659 	{ NFS4ERR_NOTEMPTY,	-ENOTEMPTY	},
7660 	{ NFS4ERR_DQUOT,	-EDQUOT		},
7661 	{ NFS4ERR_STALE,	-ESTALE		},
7662 	{ NFS4ERR_BADHANDLE,	-EBADHANDLE	},
7663 	{ NFS4ERR_BAD_COOKIE,	-EBADCOOKIE	},
7664 	{ NFS4ERR_NOTSUPP,	-ENOTSUPP	},
7665 	{ NFS4ERR_TOOSMALL,	-ETOOSMALL	},
7666 	{ NFS4ERR_SERVERFAULT,	-EREMOTEIO	},
7667 	{ NFS4ERR_BADTYPE,	-EBADTYPE	},
7668 	{ NFS4ERR_LOCKED,	-EAGAIN		},
7669 	{ NFS4ERR_SYMLINK,	-ELOOP		},
7670 	{ NFS4ERR_OP_ILLEGAL,	-EOPNOTSUPP	},
7671 	{ NFS4ERR_DEADLOCK,	-EDEADLK	},
7672 	{ -1,			-EIO		}
7673 };
7674 
7675 /*
7676  * Convert an NFS error code to a local one.
7677  * This one is used jointly by NFSv2 and NFSv3.
7678  */
7679 static int
nfs4_stat_to_errno(int stat)7680 nfs4_stat_to_errno(int stat)
7681 {
7682 	int i;
7683 	for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7684 		if (nfs_errtbl[i].stat == stat)
7685 			return nfs_errtbl[i].errno;
7686 	}
7687 	if (stat <= 10000 || stat > 10100) {
7688 		/* The server is looney tunes. */
7689 		return -EREMOTEIO;
7690 	}
7691 	/* If we cannot translate the error, the recovery routines should
7692 	 * handle it.
7693 	 * Note: remaining NFSv4 error codes have values > 10000, so should
7694 	 * not conflict with native Linux error codes.
7695 	 */
7696 	return -stat;
7697 }
7698 
7699 #ifdef CONFIG_NFS_V4_2
7700 #include "nfs42xdr.c"
7701 #endif /* CONFIG_NFS_V4_2 */
7702 
7703 #define PROC(proc, argtype, restype)				\
7704 [NFSPROC4_CLNT_##proc] = {					\
7705 	.p_proc   = NFSPROC4_COMPOUND,				\
7706 	.p_encode = nfs4_xdr_##argtype,				\
7707 	.p_decode = nfs4_xdr_##restype,				\
7708 	.p_arglen = NFS4_##argtype##_sz,			\
7709 	.p_replen = NFS4_##restype##_sz,			\
7710 	.p_statidx = NFSPROC4_CLNT_##proc,			\
7711 	.p_name   = #proc,					\
7712 }
7713 
7714 #define STUB(proc)		\
7715 [NFSPROC4_CLNT_##proc] = {	\
7716 	.p_name = #proc,	\
7717 }
7718 
7719 #if defined(CONFIG_NFS_V4_1)
7720 #define PROC41(proc, argtype, restype)				\
7721 	PROC(proc, argtype, restype)
7722 #else
7723 #define PROC41(proc, argtype, restype)				\
7724 	STUB(proc)
7725 #endif
7726 
7727 #if defined(CONFIG_NFS_V4_2)
7728 #define PROC42(proc, argtype, restype)				\
7729 	PROC(proc, argtype, restype)
7730 #else
7731 #define PROC42(proc, argtype, restype)				\
7732 	STUB(proc)
7733 #endif
7734 
7735 const struct rpc_procinfo nfs4_procedures[] = {
7736 	PROC(READ,		enc_read,		dec_read),
7737 	PROC(WRITE,		enc_write,		dec_write),
7738 	PROC(COMMIT,		enc_commit,		dec_commit),
7739 	PROC(OPEN,		enc_open,		dec_open),
7740 	PROC(OPEN_CONFIRM,	enc_open_confirm,	dec_open_confirm),
7741 	PROC(OPEN_NOATTR,	enc_open_noattr,	dec_open_noattr),
7742 	PROC(OPEN_DOWNGRADE,	enc_open_downgrade,	dec_open_downgrade),
7743 	PROC(CLOSE,		enc_close,		dec_close),
7744 	PROC(SETATTR,		enc_setattr,		dec_setattr),
7745 	PROC(FSINFO,		enc_fsinfo,		dec_fsinfo),
7746 	PROC(RENEW,		enc_renew,		dec_renew),
7747 	PROC(SETCLIENTID,	enc_setclientid,	dec_setclientid),
7748 	PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7749 	PROC(LOCK,		enc_lock,		dec_lock),
7750 	PROC(LOCKT,		enc_lockt,		dec_lockt),
7751 	PROC(LOCKU,		enc_locku,		dec_locku),
7752 	PROC(ACCESS,		enc_access,		dec_access),
7753 	PROC(GETATTR,		enc_getattr,		dec_getattr),
7754 	PROC(LOOKUP,		enc_lookup,		dec_lookup),
7755 	PROC(LOOKUP_ROOT,	enc_lookup_root,	dec_lookup_root),
7756 	PROC(REMOVE,		enc_remove,		dec_remove),
7757 	PROC(RENAME,		enc_rename,		dec_rename),
7758 	PROC(LINK,		enc_link,		dec_link),
7759 	PROC(SYMLINK,		enc_symlink,		dec_symlink),
7760 	PROC(CREATE,		enc_create,		dec_create),
7761 	PROC(PATHCONF,		enc_pathconf,		dec_pathconf),
7762 	PROC(STATFS,		enc_statfs,		dec_statfs),
7763 	PROC(READLINK,		enc_readlink,		dec_readlink),
7764 	PROC(READDIR,		enc_readdir,		dec_readdir),
7765 	PROC(SERVER_CAPS,	enc_server_caps,	dec_server_caps),
7766 	PROC(DELEGRETURN,	enc_delegreturn,	dec_delegreturn),
7767 	PROC(GETACL,		enc_getacl,		dec_getacl),
7768 	PROC(SETACL,		enc_setacl,		dec_setacl),
7769 	PROC(FS_LOCATIONS,	enc_fs_locations,	dec_fs_locations),
7770 	PROC(RELEASE_LOCKOWNER,	enc_release_lockowner,	dec_release_lockowner),
7771 	PROC(SECINFO,		enc_secinfo,		dec_secinfo),
7772 	PROC(FSID_PRESENT,	enc_fsid_present,	dec_fsid_present),
7773 	PROC41(EXCHANGE_ID,	enc_exchange_id,	dec_exchange_id),
7774 	PROC41(CREATE_SESSION,	enc_create_session,	dec_create_session),
7775 	PROC41(DESTROY_SESSION,	enc_destroy_session,	dec_destroy_session),
7776 	PROC41(SEQUENCE,	enc_sequence,		dec_sequence),
7777 	PROC41(GET_LEASE_TIME,	enc_get_lease_time,	dec_get_lease_time),
7778 	PROC41(RECLAIM_COMPLETE,enc_reclaim_complete,	dec_reclaim_complete),
7779 	PROC41(GETDEVICEINFO,	enc_getdeviceinfo,	dec_getdeviceinfo),
7780 	PROC41(LAYOUTGET,	enc_layoutget,		dec_layoutget),
7781 	PROC41(LAYOUTCOMMIT,	enc_layoutcommit,	dec_layoutcommit),
7782 	PROC41(LAYOUTRETURN,	enc_layoutreturn,	dec_layoutreturn),
7783 	PROC41(SECINFO_NO_NAME,	enc_secinfo_no_name,	dec_secinfo_no_name),
7784 	PROC41(TEST_STATEID,	enc_test_stateid,	dec_test_stateid),
7785 	PROC41(FREE_STATEID,	enc_free_stateid,	dec_free_stateid),
7786 	STUB(GETDEVICELIST),
7787 	PROC41(BIND_CONN_TO_SESSION,
7788 			enc_bind_conn_to_session, dec_bind_conn_to_session),
7789 	PROC41(DESTROY_CLIENTID,enc_destroy_clientid,	dec_destroy_clientid),
7790 	PROC42(SEEK,		enc_seek,		dec_seek),
7791 	PROC42(ALLOCATE,	enc_allocate,		dec_allocate),
7792 	PROC42(DEALLOCATE,	enc_deallocate,		dec_deallocate),
7793 	PROC42(LAYOUTSTATS,	enc_layoutstats,	dec_layoutstats),
7794 	PROC42(CLONE,		enc_clone,		dec_clone),
7795 	PROC42(COPY,		enc_copy,		dec_copy),
7796 	PROC42(OFFLOAD_CANCEL,	enc_offload_cancel,	dec_offload_cancel),
7797 	PROC(LOOKUPP,		enc_lookupp,		dec_lookupp),
7798 };
7799 
7800 static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7801 const struct rpc_version nfs_version4 = {
7802 	.number			= 4,
7803 	.nrprocs		= ARRAY_SIZE(nfs4_procedures),
7804 	.procs			= nfs4_procedures,
7805 	.counts			= nfs_version4_counts,
7806 };
7807 
7808 /*
7809  * Local variables:
7810  *  c-basic-offset: 8
7811  * End:
7812  */
7813