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1/*
2 * fs/nfs/nfs4xdr.c
3 *
4 * Client-side XDR for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/param.h>
39#include <linux/time.h>
40#include <linux/mm.h>
41#include <linux/errno.h>
42#include <linux/string.h>
43#include <linux/in.h>
44#include <linux/pagemap.h>
45#include <linux/proc_fs.h>
46#include <linux/kdev_t.h>
47#include <linux/module.h>
48#include <linux/utsname.h>
49#include <linux/sunrpc/clnt.h>
50#include <linux/sunrpc/msg_prot.h>
51#include <linux/sunrpc/gss_api.h>
52#include <linux/nfs.h>
53#include <linux/nfs4.h>
54#include <linux/nfs_fs.h>
55
56#include "nfs4_fs.h"
57#include "nfs4trace.h"
58#include "internal.h"
59#include "nfs4idmap.h"
60#include "nfs4session.h"
61#include "pnfs.h"
62#include "netns.h"
63
64#define NFSDBG_FACILITY NFSDBG_XDR
65
66/* Mapping from NFS error code to "errno" error code. */
67#define errno_NFSERR_IO EIO
68
69struct compound_hdr;
70static int nfs4_stat_to_errno(int);
71static void encode_layoutget(struct xdr_stream *xdr,
72 const struct nfs4_layoutget_args *args,
73 struct compound_hdr *hdr);
74static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
75 struct nfs4_layoutget_res *res);
76
77/* NFSv4 COMPOUND tags are only wanted for debugging purposes */
78#ifdef DEBUG
79#define NFS4_MAXTAGLEN 20
80#else
81#define NFS4_MAXTAGLEN 0
82#endif
83
84/* lock,open owner id:
85 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
86 */
87#define open_owner_id_maxsz (1 + 2 + 1 + 1 + 2)
88#define lock_owner_id_maxsz (1 + 1 + 4)
89#define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
90#define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
91#define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
92#define op_encode_hdr_maxsz (1)
93#define op_decode_hdr_maxsz (2)
94#define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
95#define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
96#define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
97#define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
98#define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
99 (NFS4_FHSIZE >> 2))
100#define decode_putfh_maxsz (op_decode_hdr_maxsz)
101#define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
102#define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
103#define encode_getfh_maxsz (op_encode_hdr_maxsz)
104#define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
105 ((3+NFS4_FHSIZE) >> 2))
106#define nfs4_fattr_bitmap_maxsz 4
107#define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
108#define nfstime4_maxsz (3)
109#define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
110#define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
111#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
112#define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
113#ifdef CONFIG_NFS_V4_SECURITY_LABEL
114/* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
115#define nfs4_label_maxsz (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
116#else
117#define nfs4_label_maxsz 0
118#endif
119/* We support only one layout type per file system */
120#define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
121/* This is based on getfattr, which uses the most attributes: */
122#define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
123 3*nfstime4_maxsz + \
124 nfs4_owner_maxsz + \
125 nfs4_group_maxsz + nfs4_label_maxsz + \
126 decode_mdsthreshold_maxsz))
127#define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
128 nfs4_fattr_value_maxsz)
129#define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
130#define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
131 1 + 2 + 1 + \
132 nfs4_owner_maxsz + \
133 nfs4_group_maxsz + \
134 nfs4_label_maxsz + \
135 1 + nfstime4_maxsz + \
136 1 + nfstime4_maxsz)
137#define encode_savefh_maxsz (op_encode_hdr_maxsz)
138#define decode_savefh_maxsz (op_decode_hdr_maxsz)
139#define encode_restorefh_maxsz (op_encode_hdr_maxsz)
140#define decode_restorefh_maxsz (op_decode_hdr_maxsz)
141#define encode_fsinfo_maxsz (encode_getattr_maxsz)
142/* The 5 accounts for the PNFS attributes, and assumes that at most three
143 * layout types will be returned.
144 */
145#define decode_fsinfo_maxsz (op_decode_hdr_maxsz + \
146 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
147#define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
148#define decode_renew_maxsz (op_decode_hdr_maxsz)
149#define encode_setclientid_maxsz \
150 (op_encode_hdr_maxsz + \
151 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
152 /* client name */ \
153 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
154 1 /* sc_prog */ + \
155 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
156 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
157 1) /* sc_cb_ident */
158#define decode_setclientid_maxsz \
159 (op_decode_hdr_maxsz + \
160 2 /* clientid */ + \
161 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
162 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
163 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
164#define encode_setclientid_confirm_maxsz \
165 (op_encode_hdr_maxsz + \
166 3 + (NFS4_VERIFIER_SIZE >> 2))
167#define decode_setclientid_confirm_maxsz \
168 (op_decode_hdr_maxsz)
169#define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
170#define decode_lookup_maxsz (op_decode_hdr_maxsz)
171#define encode_lookupp_maxsz (op_encode_hdr_maxsz)
172#define decode_lookupp_maxsz (op_decode_hdr_maxsz)
173#define encode_share_access_maxsz \
174 (2)
175#define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
176#define encode_opentype_maxsz (1 + encode_createmode_maxsz)
177#define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
178#define encode_open_maxsz (op_encode_hdr_maxsz + \
179 2 + encode_share_access_maxsz + 2 + \
180 open_owner_id_maxsz + \
181 encode_opentype_maxsz + \
182 encode_claim_null_maxsz)
183#define decode_space_limit_maxsz (3)
184#define decode_ace_maxsz (3 + nfs4_owner_maxsz)
185#define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
186 decode_space_limit_maxsz + \
187 decode_ace_maxsz)
188#define decode_change_info_maxsz (5)
189#define decode_open_maxsz (op_decode_hdr_maxsz + \
190 decode_stateid_maxsz + \
191 decode_change_info_maxsz + 1 + \
192 nfs4_fattr_bitmap_maxsz + \
193 decode_delegation_maxsz)
194#define encode_open_confirm_maxsz \
195 (op_encode_hdr_maxsz + \
196 encode_stateid_maxsz + 1)
197#define decode_open_confirm_maxsz \
198 (op_decode_hdr_maxsz + \
199 decode_stateid_maxsz)
200#define encode_open_downgrade_maxsz \
201 (op_encode_hdr_maxsz + \
202 encode_stateid_maxsz + 1 + \
203 encode_share_access_maxsz)
204#define decode_open_downgrade_maxsz \
205 (op_decode_hdr_maxsz + \
206 decode_stateid_maxsz)
207#define encode_close_maxsz (op_encode_hdr_maxsz + \
208 1 + encode_stateid_maxsz)
209#define decode_close_maxsz (op_decode_hdr_maxsz + \
210 decode_stateid_maxsz)
211#define encode_setattr_maxsz (op_encode_hdr_maxsz + \
212 encode_stateid_maxsz + \
213 encode_attrs_maxsz)
214#define decode_setattr_maxsz (op_decode_hdr_maxsz + \
215 nfs4_fattr_bitmap_maxsz)
216#define encode_read_maxsz (op_encode_hdr_maxsz + \
217 encode_stateid_maxsz + 3)
218#define decode_read_maxsz (op_decode_hdr_maxsz + 2 + 1)
219#define encode_readdir_maxsz (op_encode_hdr_maxsz + \
220 2 + encode_verifier_maxsz + 5 + \
221 nfs4_label_maxsz)
222#define decode_readdir_maxsz (op_decode_hdr_maxsz + \
223 decode_verifier_maxsz + 1)
224#define encode_readlink_maxsz (op_encode_hdr_maxsz)
225#define decode_readlink_maxsz (op_decode_hdr_maxsz + 1 + 1)
226#define encode_write_maxsz (op_encode_hdr_maxsz + \
227 encode_stateid_maxsz + 4)
228#define decode_write_maxsz (op_decode_hdr_maxsz + \
229 2 + decode_verifier_maxsz)
230#define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
231#define decode_commit_maxsz (op_decode_hdr_maxsz + \
232 decode_verifier_maxsz)
233#define encode_remove_maxsz (op_encode_hdr_maxsz + \
234 nfs4_name_maxsz)
235#define decode_remove_maxsz (op_decode_hdr_maxsz + \
236 decode_change_info_maxsz)
237#define encode_rename_maxsz (op_encode_hdr_maxsz + \
238 2 * nfs4_name_maxsz)
239#define decode_rename_maxsz (op_decode_hdr_maxsz + \
240 decode_change_info_maxsz + \
241 decode_change_info_maxsz)
242#define encode_link_maxsz (op_encode_hdr_maxsz + \
243 nfs4_name_maxsz)
244#define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
245#define encode_lockowner_maxsz (7)
246#define encode_lock_maxsz (op_encode_hdr_maxsz + \
247 7 + \
248 1 + encode_stateid_maxsz + 1 + \
249 encode_lockowner_maxsz)
250#define decode_lock_denied_maxsz \
251 (8 + decode_lockowner_maxsz)
252#define decode_lock_maxsz (op_decode_hdr_maxsz + \
253 decode_lock_denied_maxsz)
254#define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
255 encode_lockowner_maxsz)
256#define decode_lockt_maxsz (op_decode_hdr_maxsz + \
257 decode_lock_denied_maxsz)
258#define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
259 encode_stateid_maxsz + \
260 4)
261#define decode_locku_maxsz (op_decode_hdr_maxsz + \
262 decode_stateid_maxsz)
263#define encode_release_lockowner_maxsz \
264 (op_encode_hdr_maxsz + \
265 encode_lockowner_maxsz)
266#define decode_release_lockowner_maxsz \
267 (op_decode_hdr_maxsz)
268#define encode_access_maxsz (op_encode_hdr_maxsz + 1)
269#define decode_access_maxsz (op_decode_hdr_maxsz + 2)
270#define encode_symlink_maxsz (op_encode_hdr_maxsz + \
271 1 + nfs4_name_maxsz + \
272 1 + \
273 nfs4_fattr_maxsz)
274#define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
275#define encode_create_maxsz (op_encode_hdr_maxsz + \
276 1 + 2 + nfs4_name_maxsz + \
277 encode_attrs_maxsz)
278#define decode_create_maxsz (op_decode_hdr_maxsz + \
279 decode_change_info_maxsz + \
280 nfs4_fattr_bitmap_maxsz)
281#define encode_statfs_maxsz (encode_getattr_maxsz)
282#define decode_statfs_maxsz (decode_getattr_maxsz)
283#define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
284#define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
285#define encode_getacl_maxsz (encode_getattr_maxsz)
286#define decode_getacl_maxsz (op_decode_hdr_maxsz + \
287 nfs4_fattr_bitmap_maxsz + 1 + 1)
288#define encode_setacl_maxsz (op_encode_hdr_maxsz + \
289 encode_stateid_maxsz + 3)
290#define decode_setacl_maxsz (decode_setattr_maxsz)
291#define encode_fs_locations_maxsz \
292 (encode_getattr_maxsz)
293#define decode_fs_locations_maxsz \
294 (1)
295#define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
296#define decode_secinfo_maxsz (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
297
298#if defined(CONFIG_NFS_V4_1)
299#define NFS4_MAX_MACHINE_NAME_LEN (64)
300#define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
301 sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
302
303#define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
304 encode_verifier_maxsz + \
305 1 /* co_ownerid.len */ + \
306 /* eia_clientowner */ \
307 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
308 1 /* flags */ + \
309 1 /* spa_how */ + \
310 /* max is SP4_MACH_CRED (for now) */ + \
311 1 + NFS4_OP_MAP_NUM_WORDS + \
312 1 + NFS4_OP_MAP_NUM_WORDS + \
313 1 /* implementation id array of size 1 */ + \
314 1 /* nii_domain */ + \
315 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
316 1 /* nii_name */ + \
317 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
318 3 /* nii_date */)
319#define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
320 2 /* eir_clientid */ + \
321 1 /* eir_sequenceid */ + \
322 1 /* eir_flags */ + \
323 1 /* spr_how */ + \
324 /* max is SP4_MACH_CRED (for now) */ + \
325 1 + NFS4_OP_MAP_NUM_WORDS + \
326 1 + NFS4_OP_MAP_NUM_WORDS + \
327 2 /* eir_server_owner.so_minor_id */ + \
328 /* eir_server_owner.so_major_id<> */ \
329 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
330 /* eir_server_scope<> */ \
331 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
332 1 /* eir_server_impl_id array length */ + \
333 1 /* nii_domain */ + \
334 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
335 1 /* nii_name */ + \
336 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
337 3 /* nii_date */)
338#define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
339#define decode_channel_attrs_maxsz (6 + \
340 1 /* ca_rdma_ird.len */ + \
341 1 /* ca_rdma_ird */)
342#define encode_create_session_maxsz (op_encode_hdr_maxsz + \
343 2 /* csa_clientid */ + \
344 1 /* csa_sequence */ + \
345 1 /* csa_flags */ + \
346 encode_channel_attrs_maxsz + \
347 encode_channel_attrs_maxsz + \
348 1 /* csa_cb_program */ + \
349 1 /* csa_sec_parms.len (1) */ + \
350 1 /* cb_secflavor (AUTH_SYS) */ + \
351 1 /* stamp */ + \
352 1 /* machinename.len */ + \
353 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
354 1 /* uid */ + \
355 1 /* gid */ + \
356 1 /* gids.len (0) */)
357#define decode_create_session_maxsz (op_decode_hdr_maxsz + \
358 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
359 1 /* csr_sequence */ + \
360 1 /* csr_flags */ + \
361 decode_channel_attrs_maxsz + \
362 decode_channel_attrs_maxsz)
363#define encode_bind_conn_to_session_maxsz (op_encode_hdr_maxsz + \
364 /* bctsa_sessid */ \
365 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
366 1 /* bctsa_dir */ + \
367 1 /* bctsa_use_conn_in_rdma_mode */)
368#define decode_bind_conn_to_session_maxsz (op_decode_hdr_maxsz + \
369 /* bctsr_sessid */ \
370 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
371 1 /* bctsr_dir */ + \
372 1 /* bctsr_use_conn_in_rdma_mode */)
373#define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
374#define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
375#define encode_destroy_clientid_maxsz (op_encode_hdr_maxsz + 2)
376#define decode_destroy_clientid_maxsz (op_decode_hdr_maxsz)
377#define encode_sequence_maxsz (op_encode_hdr_maxsz + \
378 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
379#define decode_sequence_maxsz (op_decode_hdr_maxsz + \
380 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
381#define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
382#define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
383#define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
384 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
385 1 /* layout type */ + \
386 1 /* maxcount */ + \
387 1 /* bitmap size */ + \
388 1 /* notification bitmap length */ + \
389 1 /* notification bitmap, word 0 */)
390#define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
391 1 /* layout type */ + \
392 1 /* opaque devaddr4 length */ + \
393 /* devaddr4 payload is read into page */ \
394 1 /* notification bitmap length */ + \
395 1 /* notification bitmap, word 0 */ + \
396 1 /* possible XDR padding */)
397#define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
398 encode_stateid_maxsz)
399#define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
400 decode_stateid_maxsz + \
401 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE) + 1)
402#define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
403 2 /* offset */ + \
404 2 /* length */ + \
405 1 /* reclaim */ + \
406 encode_stateid_maxsz + \
407 1 /* new offset (true) */ + \
408 2 /* last byte written */ + \
409 1 /* nt_timechanged (false) */ + \
410 1 /* layoutupdate4 layout type */ + \
411 1 /* layoutupdate4 opaqueue len */)
412 /* the actual content of layoutupdate4 should
413 be allocated by drivers and spliced in
414 using xdr_write_pages */
415#define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
416#define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
417 encode_stateid_maxsz + \
418 1 + \
419 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
420#define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
421 1 + decode_stateid_maxsz)
422#define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
423#define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
424#define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \
425 XDR_QUADLEN(NFS4_STATEID_SIZE))
426#define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1)
427#define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \
428 XDR_QUADLEN(NFS4_STATEID_SIZE))
429#define decode_free_stateid_maxsz (op_decode_hdr_maxsz)
430#else /* CONFIG_NFS_V4_1 */
431#define encode_sequence_maxsz 0
432#define decode_sequence_maxsz 0
433#define encode_layoutreturn_maxsz 0
434#define decode_layoutreturn_maxsz 0
435#define encode_layoutget_maxsz 0
436#define decode_layoutget_maxsz 0
437#endif /* CONFIG_NFS_V4_1 */
438
439#define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
440#define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
441#define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
442 encode_sequence_maxsz + \
443 encode_putfh_maxsz + \
444 encode_read_maxsz)
445#define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
446 decode_sequence_maxsz + \
447 decode_putfh_maxsz + \
448 decode_read_maxsz)
449#define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
450 encode_sequence_maxsz + \
451 encode_putfh_maxsz + \
452 encode_readlink_maxsz)
453#define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
454 decode_sequence_maxsz + \
455 decode_putfh_maxsz + \
456 decode_readlink_maxsz)
457#define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
458 encode_sequence_maxsz + \
459 encode_putfh_maxsz + \
460 encode_readdir_maxsz)
461#define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
462 decode_sequence_maxsz + \
463 decode_putfh_maxsz + \
464 decode_readdir_maxsz)
465#define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
466 encode_sequence_maxsz + \
467 encode_putfh_maxsz + \
468 encode_write_maxsz + \
469 encode_getattr_maxsz)
470#define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
471 decode_sequence_maxsz + \
472 decode_putfh_maxsz + \
473 decode_write_maxsz + \
474 decode_getattr_maxsz)
475#define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
476 encode_sequence_maxsz + \
477 encode_putfh_maxsz + \
478 encode_commit_maxsz)
479#define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
480 decode_sequence_maxsz + \
481 decode_putfh_maxsz + \
482 decode_commit_maxsz)
483#define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
484 encode_sequence_maxsz + \
485 encode_putfh_maxsz + \
486 encode_open_maxsz + \
487 encode_access_maxsz + \
488 encode_getfh_maxsz + \
489 encode_getattr_maxsz + \
490 encode_layoutget_maxsz)
491#define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
492 decode_sequence_maxsz + \
493 decode_putfh_maxsz + \
494 decode_open_maxsz + \
495 decode_access_maxsz + \
496 decode_getfh_maxsz + \
497 decode_getattr_maxsz + \
498 decode_layoutget_maxsz)
499#define NFS4_enc_open_confirm_sz \
500 (compound_encode_hdr_maxsz + \
501 encode_putfh_maxsz + \
502 encode_open_confirm_maxsz)
503#define NFS4_dec_open_confirm_sz \
504 (compound_decode_hdr_maxsz + \
505 decode_putfh_maxsz + \
506 decode_open_confirm_maxsz)
507#define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
508 encode_sequence_maxsz + \
509 encode_putfh_maxsz + \
510 encode_open_maxsz + \
511 encode_access_maxsz + \
512 encode_getattr_maxsz + \
513 encode_layoutget_maxsz)
514#define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
515 decode_sequence_maxsz + \
516 decode_putfh_maxsz + \
517 decode_open_maxsz + \
518 decode_access_maxsz + \
519 decode_getattr_maxsz + \
520 decode_layoutget_maxsz)
521#define NFS4_enc_open_downgrade_sz \
522 (compound_encode_hdr_maxsz + \
523 encode_sequence_maxsz + \
524 encode_putfh_maxsz + \
525 encode_layoutreturn_maxsz + \
526 encode_open_downgrade_maxsz)
527#define NFS4_dec_open_downgrade_sz \
528 (compound_decode_hdr_maxsz + \
529 decode_sequence_maxsz + \
530 decode_putfh_maxsz + \
531 decode_layoutreturn_maxsz + \
532 decode_open_downgrade_maxsz)
533#define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
534 encode_sequence_maxsz + \
535 encode_putfh_maxsz + \
536 encode_layoutreturn_maxsz + \
537 encode_close_maxsz + \
538 encode_getattr_maxsz)
539#define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
540 decode_sequence_maxsz + \
541 decode_putfh_maxsz + \
542 decode_layoutreturn_maxsz + \
543 decode_close_maxsz + \
544 decode_getattr_maxsz)
545#define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
546 encode_sequence_maxsz + \
547 encode_putfh_maxsz + \
548 encode_setattr_maxsz + \
549 encode_getattr_maxsz)
550#define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
551 decode_sequence_maxsz + \
552 decode_putfh_maxsz + \
553 decode_setattr_maxsz + \
554 decode_getattr_maxsz)
555#define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
556 encode_sequence_maxsz + \
557 encode_putfh_maxsz + \
558 encode_fsinfo_maxsz)
559#define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
560 decode_sequence_maxsz + \
561 decode_putfh_maxsz + \
562 decode_fsinfo_maxsz)
563#define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
564 encode_renew_maxsz)
565#define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
566 decode_renew_maxsz)
567#define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
568 encode_setclientid_maxsz)
569#define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
570 decode_setclientid_maxsz)
571#define NFS4_enc_setclientid_confirm_sz \
572 (compound_encode_hdr_maxsz + \
573 encode_setclientid_confirm_maxsz)
574#define NFS4_dec_setclientid_confirm_sz \
575 (compound_decode_hdr_maxsz + \
576 decode_setclientid_confirm_maxsz)
577#define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
578 encode_sequence_maxsz + \
579 encode_putfh_maxsz + \
580 encode_lock_maxsz)
581#define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
582 decode_sequence_maxsz + \
583 decode_putfh_maxsz + \
584 decode_lock_maxsz)
585#define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
586 encode_sequence_maxsz + \
587 encode_putfh_maxsz + \
588 encode_lockt_maxsz)
589#define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
590 decode_sequence_maxsz + \
591 decode_putfh_maxsz + \
592 decode_lockt_maxsz)
593#define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
594 encode_sequence_maxsz + \
595 encode_putfh_maxsz + \
596 encode_locku_maxsz)
597#define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
598 decode_sequence_maxsz + \
599 decode_putfh_maxsz + \
600 decode_locku_maxsz)
601#define NFS4_enc_release_lockowner_sz \
602 (compound_encode_hdr_maxsz + \
603 encode_lockowner_maxsz)
604#define NFS4_dec_release_lockowner_sz \
605 (compound_decode_hdr_maxsz + \
606 decode_lockowner_maxsz)
607#define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
608 encode_sequence_maxsz + \
609 encode_putfh_maxsz + \
610 encode_access_maxsz + \
611 encode_getattr_maxsz)
612#define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
613 decode_sequence_maxsz + \
614 decode_putfh_maxsz + \
615 decode_access_maxsz + \
616 decode_getattr_maxsz)
617#define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
618 encode_sequence_maxsz + \
619 encode_putfh_maxsz + \
620 encode_getattr_maxsz + \
621 encode_renew_maxsz)
622#define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
623 decode_sequence_maxsz + \
624 decode_putfh_maxsz + \
625 decode_getattr_maxsz + \
626 decode_renew_maxsz)
627#define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
628 encode_sequence_maxsz + \
629 encode_putfh_maxsz + \
630 encode_lookup_maxsz + \
631 encode_getattr_maxsz + \
632 encode_getfh_maxsz)
633#define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
634 decode_sequence_maxsz + \
635 decode_putfh_maxsz + \
636 decode_lookup_maxsz + \
637 decode_getattr_maxsz + \
638 decode_getfh_maxsz)
639#define NFS4_enc_lookupp_sz (compound_encode_hdr_maxsz + \
640 encode_sequence_maxsz + \
641 encode_putfh_maxsz + \
642 encode_lookupp_maxsz + \
643 encode_getattr_maxsz + \
644 encode_getfh_maxsz)
645#define NFS4_dec_lookupp_sz (compound_decode_hdr_maxsz + \
646 decode_sequence_maxsz + \
647 decode_putfh_maxsz + \
648 decode_lookupp_maxsz + \
649 decode_getattr_maxsz + \
650 decode_getfh_maxsz)
651#define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
652 encode_sequence_maxsz + \
653 encode_putrootfh_maxsz + \
654 encode_getattr_maxsz + \
655 encode_getfh_maxsz)
656#define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
657 decode_sequence_maxsz + \
658 decode_putrootfh_maxsz + \
659 decode_getattr_maxsz + \
660 decode_getfh_maxsz)
661#define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
662 encode_sequence_maxsz + \
663 encode_putfh_maxsz + \
664 encode_remove_maxsz)
665#define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
666 decode_sequence_maxsz + \
667 decode_putfh_maxsz + \
668 decode_remove_maxsz)
669#define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
670 encode_sequence_maxsz + \
671 encode_putfh_maxsz + \
672 encode_savefh_maxsz + \
673 encode_putfh_maxsz + \
674 encode_rename_maxsz)
675#define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
676 decode_sequence_maxsz + \
677 decode_putfh_maxsz + \
678 decode_savefh_maxsz + \
679 decode_putfh_maxsz + \
680 decode_rename_maxsz)
681#define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
682 encode_sequence_maxsz + \
683 encode_putfh_maxsz + \
684 encode_savefh_maxsz + \
685 encode_putfh_maxsz + \
686 encode_link_maxsz + \
687 encode_restorefh_maxsz + \
688 encode_getattr_maxsz)
689#define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
690 decode_sequence_maxsz + \
691 decode_putfh_maxsz + \
692 decode_savefh_maxsz + \
693 decode_putfh_maxsz + \
694 decode_link_maxsz + \
695 decode_restorefh_maxsz + \
696 decode_getattr_maxsz)
697#define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
698 encode_sequence_maxsz + \
699 encode_putfh_maxsz + \
700 encode_symlink_maxsz + \
701 encode_getattr_maxsz + \
702 encode_getfh_maxsz)
703#define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
704 decode_sequence_maxsz + \
705 decode_putfh_maxsz + \
706 decode_symlink_maxsz + \
707 decode_getattr_maxsz + \
708 decode_getfh_maxsz)
709#define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
710 encode_sequence_maxsz + \
711 encode_putfh_maxsz + \
712 encode_create_maxsz + \
713 encode_getfh_maxsz + \
714 encode_getattr_maxsz)
715#define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
716 decode_sequence_maxsz + \
717 decode_putfh_maxsz + \
718 decode_create_maxsz + \
719 decode_getfh_maxsz + \
720 decode_getattr_maxsz)
721#define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
722 encode_sequence_maxsz + \
723 encode_putfh_maxsz + \
724 encode_getattr_maxsz)
725#define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
726 decode_sequence_maxsz + \
727 decode_putfh_maxsz + \
728 decode_getattr_maxsz)
729#define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
730 encode_sequence_maxsz + \
731 encode_putfh_maxsz + \
732 encode_statfs_maxsz)
733#define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
734 decode_sequence_maxsz + \
735 decode_putfh_maxsz + \
736 decode_statfs_maxsz)
737#define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
738 encode_sequence_maxsz + \
739 encode_putfh_maxsz + \
740 encode_getattr_maxsz)
741#define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
742 decode_sequence_maxsz + \
743 decode_putfh_maxsz + \
744 decode_getattr_maxsz)
745#define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
746 encode_sequence_maxsz + \
747 encode_putfh_maxsz + \
748 encode_layoutreturn_maxsz + \
749 encode_delegreturn_maxsz + \
750 encode_getattr_maxsz)
751#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
752 decode_sequence_maxsz + \
753 decode_putfh_maxsz + \
754 decode_layoutreturn_maxsz + \
755 decode_delegreturn_maxsz + \
756 decode_getattr_maxsz)
757#define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
758 encode_sequence_maxsz + \
759 encode_putfh_maxsz + \
760 encode_getacl_maxsz)
761#define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
762 decode_sequence_maxsz + \
763 decode_putfh_maxsz + \
764 decode_getacl_maxsz)
765#define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
766 encode_sequence_maxsz + \
767 encode_putfh_maxsz + \
768 encode_setacl_maxsz)
769#define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
770 decode_sequence_maxsz + \
771 decode_putfh_maxsz + \
772 decode_setacl_maxsz)
773#define NFS4_enc_fs_locations_sz \
774 (compound_encode_hdr_maxsz + \
775 encode_sequence_maxsz + \
776 encode_putfh_maxsz + \
777 encode_lookup_maxsz + \
778 encode_fs_locations_maxsz + \
779 encode_renew_maxsz)
780#define NFS4_dec_fs_locations_sz \
781 (compound_decode_hdr_maxsz + \
782 decode_sequence_maxsz + \
783 decode_putfh_maxsz + \
784 decode_lookup_maxsz + \
785 decode_fs_locations_maxsz + \
786 decode_renew_maxsz)
787#define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
788 encode_sequence_maxsz + \
789 encode_putfh_maxsz + \
790 encode_secinfo_maxsz)
791#define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
792 decode_sequence_maxsz + \
793 decode_putfh_maxsz + \
794 decode_secinfo_maxsz)
795#define NFS4_enc_fsid_present_sz \
796 (compound_encode_hdr_maxsz + \
797 encode_sequence_maxsz + \
798 encode_putfh_maxsz + \
799 encode_getfh_maxsz + \
800 encode_renew_maxsz)
801#define NFS4_dec_fsid_present_sz \
802 (compound_decode_hdr_maxsz + \
803 decode_sequence_maxsz + \
804 decode_putfh_maxsz + \
805 decode_getfh_maxsz + \
806 decode_renew_maxsz)
807#if defined(CONFIG_NFS_V4_1)
808#define NFS4_enc_bind_conn_to_session_sz \
809 (compound_encode_hdr_maxsz + \
810 encode_bind_conn_to_session_maxsz)
811#define NFS4_dec_bind_conn_to_session_sz \
812 (compound_decode_hdr_maxsz + \
813 decode_bind_conn_to_session_maxsz)
814#define NFS4_enc_exchange_id_sz \
815 (compound_encode_hdr_maxsz + \
816 encode_exchange_id_maxsz)
817#define NFS4_dec_exchange_id_sz \
818 (compound_decode_hdr_maxsz + \
819 decode_exchange_id_maxsz)
820#define NFS4_enc_create_session_sz \
821 (compound_encode_hdr_maxsz + \
822 encode_create_session_maxsz)
823#define NFS4_dec_create_session_sz \
824 (compound_decode_hdr_maxsz + \
825 decode_create_session_maxsz)
826#define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
827 encode_destroy_session_maxsz)
828#define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
829 decode_destroy_session_maxsz)
830#define NFS4_enc_destroy_clientid_sz (compound_encode_hdr_maxsz + \
831 encode_destroy_clientid_maxsz)
832#define NFS4_dec_destroy_clientid_sz (compound_decode_hdr_maxsz + \
833 decode_destroy_clientid_maxsz)
834#define NFS4_enc_sequence_sz \
835 (compound_decode_hdr_maxsz + \
836 encode_sequence_maxsz)
837#define NFS4_dec_sequence_sz \
838 (compound_decode_hdr_maxsz + \
839 decode_sequence_maxsz)
840#endif
841#define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
842 encode_sequence_maxsz + \
843 encode_putrootfh_maxsz + \
844 encode_fsinfo_maxsz)
845#define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
846 decode_sequence_maxsz + \
847 decode_putrootfh_maxsz + \
848 decode_fsinfo_maxsz)
849#if defined(CONFIG_NFS_V4_1)
850#define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
851 encode_sequence_maxsz + \
852 encode_reclaim_complete_maxsz)
853#define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
854 decode_sequence_maxsz + \
855 decode_reclaim_complete_maxsz)
856#define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
857 encode_sequence_maxsz +\
858 encode_getdeviceinfo_maxsz)
859#define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
860 decode_sequence_maxsz + \
861 decode_getdeviceinfo_maxsz)
862#define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
863 encode_sequence_maxsz + \
864 encode_putfh_maxsz + \
865 encode_layoutget_maxsz)
866#define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
867 decode_sequence_maxsz + \
868 decode_putfh_maxsz + \
869 decode_layoutget_maxsz)
870#define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
871 encode_sequence_maxsz +\
872 encode_putfh_maxsz + \
873 encode_layoutcommit_maxsz + \
874 encode_getattr_maxsz)
875#define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
876 decode_sequence_maxsz + \
877 decode_putfh_maxsz + \
878 decode_layoutcommit_maxsz + \
879 decode_getattr_maxsz)
880#define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
881 encode_sequence_maxsz + \
882 encode_putfh_maxsz + \
883 encode_layoutreturn_maxsz)
884#define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
885 decode_sequence_maxsz + \
886 decode_putfh_maxsz + \
887 decode_layoutreturn_maxsz)
888#define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
889 encode_sequence_maxsz + \
890 encode_putrootfh_maxsz +\
891 encode_secinfo_no_name_maxsz)
892#define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
893 decode_sequence_maxsz + \
894 decode_putrootfh_maxsz + \
895 decode_secinfo_no_name_maxsz)
896#define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
897 encode_sequence_maxsz + \
898 encode_test_stateid_maxsz)
899#define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
900 decode_sequence_maxsz + \
901 decode_test_stateid_maxsz)
902#define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \
903 encode_sequence_maxsz + \
904 encode_free_stateid_maxsz)
905#define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
906 decode_sequence_maxsz + \
907 decode_free_stateid_maxsz)
908
909const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
910 compound_encode_hdr_maxsz +
911 encode_sequence_maxsz +
912 encode_putfh_maxsz +
913 encode_getattr_maxsz) *
914 XDR_UNIT);
915
916const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
917 compound_decode_hdr_maxsz +
918 decode_sequence_maxsz +
919 decode_putfh_maxsz) *
920 XDR_UNIT);
921
922const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
923 compound_decode_hdr_maxsz +
924 decode_sequence_maxsz) *
925 XDR_UNIT);
926EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
927#endif /* CONFIG_NFS_V4_1 */
928
929static const umode_t nfs_type2fmt[] = {
930 [NF4BAD] = 0,
931 [NF4REG] = S_IFREG,
932 [NF4DIR] = S_IFDIR,
933 [NF4BLK] = S_IFBLK,
934 [NF4CHR] = S_IFCHR,
935 [NF4LNK] = S_IFLNK,
936 [NF4SOCK] = S_IFSOCK,
937 [NF4FIFO] = S_IFIFO,
938 [NF4ATTRDIR] = 0,
939 [NF4NAMEDATTR] = 0,
940};
941
942struct compound_hdr {
943 int32_t status;
944 uint32_t nops;
945 __be32 * nops_p;
946 uint32_t taglen;
947 char * tag;
948 uint32_t replen; /* expected reply words */
949 u32 minorversion;
950};
951
952static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
953{
954 __be32 *p = xdr_reserve_space(xdr, nbytes);
955 BUG_ON(!p);
956 return p;
957}
958
959static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
960{
961 WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
962}
963
964static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
965{
966 WARN_ON_ONCE(xdr_stream_encode_opaque(xdr, str, len) < 0);
967}
968
969static void encode_uint32(struct xdr_stream *xdr, u32 n)
970{
971 WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
972}
973
974static void encode_uint64(struct xdr_stream *xdr, u64 n)
975{
976 WARN_ON_ONCE(xdr_stream_encode_u64(xdr, n) < 0);
977}
978
979static ssize_t xdr_encode_bitmap4(struct xdr_stream *xdr,
980 const __u32 *bitmap, size_t len)
981{
982 ssize_t ret;
983
984 /* Trim empty words */
985 while (len > 0 && bitmap[len-1] == 0)
986 len--;
987 ret = xdr_stream_encode_uint32_array(xdr, bitmap, len);
988 if (WARN_ON_ONCE(ret < 0))
989 return ret;
990 return len;
991}
992
993static size_t mask_bitmap4(const __u32 *bitmap, const __u32 *mask,
994 __u32 *res, size_t len)
995{
996 size_t i;
997 __u32 tmp;
998
999 while (len > 0 && (bitmap[len-1] == 0 || mask[len-1] == 0))
1000 len--;
1001 for (i = len; i-- > 0;) {
1002 tmp = bitmap[i] & mask[i];
1003 res[i] = tmp;
1004 }
1005 return len;
1006}
1007
1008static void encode_nfs4_seqid(struct xdr_stream *xdr,
1009 const struct nfs_seqid *seqid)
1010{
1011 if (seqid != NULL)
1012 encode_uint32(xdr, seqid->sequence->counter);
1013 else
1014 encode_uint32(xdr, 0);
1015}
1016
1017static void encode_compound_hdr(struct xdr_stream *xdr,
1018 struct rpc_rqst *req,
1019 struct compound_hdr *hdr)
1020{
1021 __be32 *p;
1022
1023 /* initialize running count of expected bytes in reply.
1024 * NOTE: the replied tag SHOULD be the same is the one sent,
1025 * but this is not required as a MUST for the server to do so. */
1026 hdr->replen = 3 + hdr->taglen;
1027
1028 WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
1029 encode_string(xdr, hdr->taglen, hdr->tag);
1030 p = reserve_space(xdr, 8);
1031 *p++ = cpu_to_be32(hdr->minorversion);
1032 hdr->nops_p = p;
1033 *p = cpu_to_be32(hdr->nops);
1034}
1035
1036static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
1037 uint32_t replen,
1038 struct compound_hdr *hdr)
1039{
1040 encode_uint32(xdr, op);
1041 hdr->nops++;
1042 hdr->replen += replen;
1043}
1044
1045static void encode_nops(struct compound_hdr *hdr)
1046{
1047 WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
1048 *hdr->nops_p = htonl(hdr->nops);
1049}
1050
1051static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1052{
1053 encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1054}
1055
1056static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1057{
1058 encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1059}
1060
1061static __be32 *
1062xdr_encode_nfstime4(__be32 *p, const struct timespec64 *t)
1063{
1064 p = xdr_encode_hyper(p, t->tv_sec);
1065 *p++ = cpu_to_be32(t->tv_nsec);
1066 return p;
1067}
1068
1069static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1070 const struct nfs4_label *label,
1071 const umode_t *umask,
1072 const struct nfs_server *server,
1073 const uint32_t attrmask[])
1074{
1075 char owner_name[IDMAP_NAMESZ];
1076 char owner_group[IDMAP_NAMESZ];
1077 int owner_namelen = 0;
1078 int owner_grouplen = 0;
1079 __be32 *p;
1080 uint32_t len = 0;
1081 uint32_t bmval[3] = { 0 };
1082
1083 /*
1084 * We reserve enough space to write the entire attribute buffer at once.
1085 */
1086 if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1087 bmval[0] |= FATTR4_WORD0_SIZE;
1088 len += 8;
1089 }
1090 if (iap->ia_valid & ATTR_MODE) {
1091 if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1092 bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1093 len += 8;
1094 } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1095 bmval[1] |= FATTR4_WORD1_MODE;
1096 len += 4;
1097 }
1098 }
1099 if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1100 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1101 if (owner_namelen < 0) {
1102 dprintk("nfs: couldn't resolve uid %d to string\n",
1103 from_kuid(&init_user_ns, iap->ia_uid));
1104 /* XXX */
1105 strcpy(owner_name, "nobody");
1106 owner_namelen = sizeof("nobody") - 1;
1107 /* goto out; */
1108 }
1109 bmval[1] |= FATTR4_WORD1_OWNER;
1110 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1111 }
1112 if ((iap->ia_valid & ATTR_GID) &&
1113 (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1114 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1115 if (owner_grouplen < 0) {
1116 dprintk("nfs: couldn't resolve gid %d to string\n",
1117 from_kgid(&init_user_ns, iap->ia_gid));
1118 strcpy(owner_group, "nobody");
1119 owner_grouplen = sizeof("nobody") - 1;
1120 /* goto out; */
1121 }
1122 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1123 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1124 }
1125 if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1126 if (iap->ia_valid & ATTR_ATIME_SET) {
1127 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1128 len += 4 + (nfstime4_maxsz << 2);
1129 } else if (iap->ia_valid & ATTR_ATIME) {
1130 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1131 len += 4;
1132 }
1133 }
1134 if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1135 if (iap->ia_valid & ATTR_MTIME_SET) {
1136 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1137 len += 4 + (nfstime4_maxsz << 2);
1138 } else if (iap->ia_valid & ATTR_MTIME) {
1139 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1140 len += 4;
1141 }
1142 }
1143
1144 if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1145 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1146 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1147 }
1148
1149 xdr_encode_bitmap4(xdr, bmval, ARRAY_SIZE(bmval));
1150 xdr_stream_encode_opaque_inline(xdr, (void **)&p, len);
1151
1152 if (bmval[0] & FATTR4_WORD0_SIZE)
1153 p = xdr_encode_hyper(p, iap->ia_size);
1154 if (bmval[1] & FATTR4_WORD1_MODE)
1155 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1156 if (bmval[1] & FATTR4_WORD1_OWNER)
1157 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1158 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1159 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1160 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1161 if (iap->ia_valid & ATTR_ATIME_SET) {
1162 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1163 p = xdr_encode_nfstime4(p, &iap->ia_atime);
1164 } else
1165 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1166 }
1167 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1168 if (iap->ia_valid & ATTR_MTIME_SET) {
1169 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1170 p = xdr_encode_nfstime4(p, &iap->ia_mtime);
1171 } else
1172 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1173 }
1174 if (label && (bmval[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1175 *p++ = cpu_to_be32(label->lfs);
1176 *p++ = cpu_to_be32(label->pi);
1177 *p++ = cpu_to_be32(label->len);
1178 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1179 }
1180 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1181 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1182 *p++ = cpu_to_be32(*umask);
1183 }
1184
1185/* out: */
1186}
1187
1188static 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
1194static 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
1201static 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
1211static 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
1242static 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
1258static 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
1264static 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
1271static 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
1277static 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
1283static 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
1288static 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
1294static 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
1301static 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
1308static 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 */
1324static 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
1347static 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
1359static 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
1372static 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
1378static 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
1384static 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
1389static 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
1398static 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
1416static 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
1444static 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
1459static 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
1479static 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
1488static 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
1497static 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
1507static 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
1515static 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
1524static 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
1550static 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
1557static 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
1565static void
1566encode_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
1572static 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
1577static 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
1590static 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
1640static 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
1645static 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
1651static 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
1658static 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
1665static void
1666encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1667{
1668 encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1669}
1670
1671static void
1672encode_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
1687static void
1688encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1689{
1690 encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1691}
1692
1693static 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
1701static 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
1718static 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
1726static 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
1742static 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
1748static 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 */
1756static 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
1770static 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
1778static 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
1830static 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
1883static 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
1891static 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
1899static 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
1908static 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
1947static void
1948encode_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
1966static void
1967encode_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
1993static int
1994encode_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
2030static void
2031encode_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
2055static int
2056encode_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
2065static 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
2074static 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
2082static inline void
2083encode_layoutreturn(struct xdr_stream *xdr,
2084 const struct nfs4_layoutreturn_args *args,
2085 struct compound_hdr *hdr)
2086{
2087}
2088
2089static void
2090encode_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
2101static 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 */
2114static 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 */
2134static 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 */
2154static 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 */
2174static 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 */
2194static 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 */
2212static 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 */
2232static 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 */
2254static 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 */
2274static 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 */
2285static 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 */
2303static 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 */
2325static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2326 const void *data)
2327{
2328 const struct nfs_openargs *args = data;
2329 struct compound_hdr hdr = {
2330 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2331 };
2332
2333 encode_compound_hdr(xdr, req, &hdr);
2334 encode_sequence(xdr, &args->seq_args, &hdr);
2335 encode_putfh(xdr, args->fh, &hdr);
2336 encode_open(xdr, args, &hdr);
2337 encode_getfh(xdr, &hdr);
2338 if (args->access)
2339 encode_access(xdr, args->access, &hdr);
2340 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2341 if (args->lg_args) {
2342 encode_layoutget(xdr, args->lg_args, &hdr);
2343 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2344 args->lg_args->layout.pglen,
2345 hdr.replen);
2346 }
2347 encode_nops(&hdr);
2348}
2349
2350/*
2351 * Encode an OPEN_CONFIRM request
2352 */
2353static 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 */
2371static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2372 struct xdr_stream *xdr,
2373 const void *data)
2374{
2375 const struct nfs_openargs *args = data;
2376 struct compound_hdr hdr = {
2377 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2378 };
2379
2380 encode_compound_hdr(xdr, req, &hdr);
2381 encode_sequence(xdr, &args->seq_args, &hdr);
2382 encode_putfh(xdr, args->fh, &hdr);
2383 encode_open(xdr, args, &hdr);
2384 if (args->access)
2385 encode_access(xdr, args->access, &hdr);
2386 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2387 if (args->lg_args) {
2388 encode_layoutget(xdr, args->lg_args, &hdr);
2389 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2390 args->lg_args->layout.pglen,
2391 hdr.replen);
2392 }
2393 encode_nops(&hdr);
2394}
2395
2396/*
2397 * Encode an OPEN_DOWNGRADE request
2398 */
2399static 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 */
2420static 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 */
2438static 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 */
2456static 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
2471static 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 */
2488static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2489 const void *data)
2490{
2491 const struct nfs4_readlink *args = data;
2492 struct compound_hdr hdr = {
2493 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2494 };
2495
2496 encode_compound_hdr(xdr, req, &hdr);
2497 encode_sequence(xdr, &args->seq_args, &hdr);
2498 encode_putfh(xdr, args->fh, &hdr);
2499 encode_readlink(xdr, args, req, &hdr);
2500
2501 rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2502 args->pglen, hdr.replen);
2503 encode_nops(&hdr);
2504}
2505
2506/*
2507 * Encode a READDIR request
2508 */
2509static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2510 const void *data)
2511{
2512 const struct nfs4_readdir_arg *args = data;
2513 struct compound_hdr hdr = {
2514 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2515 };
2516
2517 encode_compound_hdr(xdr, req, &hdr);
2518 encode_sequence(xdr, &args->seq_args, &hdr);
2519 encode_putfh(xdr, args->fh, &hdr);
2520 encode_readdir(xdr, args, req, &hdr);
2521
2522 rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2523 args->count, hdr.replen);
2524 encode_nops(&hdr);
2525}
2526
2527/*
2528 * Encode a READ request
2529 */
2530static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2531 const void *data)
2532{
2533 const struct nfs_pgio_args *args = data;
2534 struct compound_hdr hdr = {
2535 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2536 };
2537
2538 encode_compound_hdr(xdr, req, &hdr);
2539 encode_sequence(xdr, &args->seq_args, &hdr);
2540 encode_putfh(xdr, args->fh, &hdr);
2541 encode_read(xdr, args, &hdr);
2542
2543 rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2544 args->count, hdr.replen);
2545 req->rq_rcv_buf.flags |= XDRBUF_READ;
2546 encode_nops(&hdr);
2547}
2548
2549/*
2550 * Encode an SETATTR request
2551 */
2552static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2553 const void *data)
2554{
2555 const struct nfs_setattrargs *args = data;
2556 struct compound_hdr hdr = {
2557 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2558 };
2559
2560 encode_compound_hdr(xdr, req, &hdr);
2561 encode_sequence(xdr, &args->seq_args, &hdr);
2562 encode_putfh(xdr, args->fh, &hdr);
2563 encode_setattr(xdr, args, args->server, &hdr);
2564 encode_getfattr(xdr, args->bitmask, &hdr);
2565 encode_nops(&hdr);
2566}
2567
2568/*
2569 * Encode a GETACL request
2570 */
2571static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2572 const void *data)
2573{
2574 const struct nfs_getaclargs *args = data;
2575 struct compound_hdr hdr = {
2576 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2577 };
2578 const __u32 nfs4_acl_bitmap[1] = {
2579 [0] = FATTR4_WORD0_ACL,
2580 };
2581 uint32_t replen;
2582
2583 encode_compound_hdr(xdr, req, &hdr);
2584 encode_sequence(xdr, &args->seq_args, &hdr);
2585 encode_putfh(xdr, args->fh, &hdr);
2586 replen = hdr.replen + op_decode_hdr_maxsz;
2587 encode_getattr(xdr, nfs4_acl_bitmap, NULL,
2588 ARRAY_SIZE(nfs4_acl_bitmap), &hdr);
2589
2590 rpc_prepare_reply_pages(req, args->acl_pages, 0,
2591 args->acl_len, replen + 1);
2592 encode_nops(&hdr);
2593}
2594
2595/*
2596 * Encode a WRITE request
2597 */
2598static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2599 const void *data)
2600{
2601 const struct nfs_pgio_args *args = data;
2602 struct compound_hdr hdr = {
2603 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2604 };
2605
2606 encode_compound_hdr(xdr, req, &hdr);
2607 encode_sequence(xdr, &args->seq_args, &hdr);
2608 encode_putfh(xdr, args->fh, &hdr);
2609 encode_write(xdr, args, &hdr);
2610 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2611 if (args->bitmask)
2612 encode_getfattr(xdr, args->bitmask, &hdr);
2613 encode_nops(&hdr);
2614}
2615
2616/*
2617 * a COMMIT request
2618 */
2619static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2620 const void *data)
2621{
2622 const struct nfs_commitargs *args = data;
2623 struct compound_hdr hdr = {
2624 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2625 };
2626
2627 encode_compound_hdr(xdr, req, &hdr);
2628 encode_sequence(xdr, &args->seq_args, &hdr);
2629 encode_putfh(xdr, args->fh, &hdr);
2630 encode_commit(xdr, args, &hdr);
2631 encode_nops(&hdr);
2632}
2633
2634/*
2635 * FSINFO request
2636 */
2637static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2638 const void *data)
2639{
2640 const struct nfs4_fsinfo_arg *args = data;
2641 struct compound_hdr hdr = {
2642 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2643 };
2644
2645 encode_compound_hdr(xdr, req, &hdr);
2646 encode_sequence(xdr, &args->seq_args, &hdr);
2647 encode_putfh(xdr, args->fh, &hdr);
2648 encode_fsinfo(xdr, args->bitmask, &hdr);
2649 encode_nops(&hdr);
2650}
2651
2652/*
2653 * a PATHCONF request
2654 */
2655static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2656 const void *data)
2657{
2658 const struct nfs4_pathconf_arg *args = data;
2659 struct compound_hdr hdr = {
2660 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2661 };
2662
2663 encode_compound_hdr(xdr, req, &hdr);
2664 encode_sequence(xdr, &args->seq_args, &hdr);
2665 encode_putfh(xdr, args->fh, &hdr);
2666 encode_getattr(xdr, nfs4_pathconf_bitmap, args->bitmask,
2667 ARRAY_SIZE(nfs4_pathconf_bitmap), &hdr);
2668 encode_nops(&hdr);
2669}
2670
2671/*
2672 * a STATFS request
2673 */
2674static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2675 const void *data)
2676{
2677 const struct nfs4_statfs_arg *args = data;
2678 struct compound_hdr hdr = {
2679 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2680 };
2681
2682 encode_compound_hdr(xdr, req, &hdr);
2683 encode_sequence(xdr, &args->seq_args, &hdr);
2684 encode_putfh(xdr, args->fh, &hdr);
2685 encode_getattr(xdr, nfs4_statfs_bitmap, args->bitmask,
2686 ARRAY_SIZE(nfs4_statfs_bitmap), &hdr);
2687 encode_nops(&hdr);
2688}
2689
2690/*
2691 * GETATTR_BITMAP request
2692 */
2693static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2694 struct xdr_stream *xdr,
2695 const void *data)
2696{
2697 const struct nfs4_server_caps_arg *args = data;
2698 const u32 *bitmask = args->bitmask;
2699 struct compound_hdr hdr = {
2700 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2701 };
2702
2703 encode_compound_hdr(xdr, req, &hdr);
2704 encode_sequence(xdr, &args->seq_args, &hdr);
2705 encode_putfh(xdr, args->fhandle, &hdr);
2706 encode_getattr(xdr, bitmask, NULL, 3, &hdr);
2707 encode_nops(&hdr);
2708}
2709
2710/*
2711 * a RENEW request
2712 */
2713static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2714 const void *data)
2715
2716{
2717 const struct nfs_client *clp = data;
2718 struct compound_hdr hdr = {
2719 .nops = 0,
2720 };
2721
2722 encode_compound_hdr(xdr, req, &hdr);
2723 encode_renew(xdr, clp->cl_clientid, &hdr);
2724 encode_nops(&hdr);
2725}
2726
2727/*
2728 * a SETCLIENTID request
2729 */
2730static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2731 struct xdr_stream *xdr,
2732 const void *data)
2733{
2734 const struct nfs4_setclientid *sc = data;
2735 struct compound_hdr hdr = {
2736 .nops = 0,
2737 };
2738
2739 encode_compound_hdr(xdr, req, &hdr);
2740 encode_setclientid(xdr, sc, &hdr);
2741 encode_nops(&hdr);
2742}
2743
2744/*
2745 * a SETCLIENTID_CONFIRM request
2746 */
2747static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2748 struct xdr_stream *xdr,
2749 const void *data)
2750{
2751 const struct nfs4_setclientid_res *arg = data;
2752 struct compound_hdr hdr = {
2753 .nops = 0,
2754 };
2755
2756 encode_compound_hdr(xdr, req, &hdr);
2757 encode_setclientid_confirm(xdr, arg, &hdr);
2758 encode_nops(&hdr);
2759}
2760
2761/*
2762 * DELEGRETURN request
2763 */
2764static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2765 struct xdr_stream *xdr,
2766 const void *data)
2767{
2768 const struct nfs4_delegreturnargs *args = data;
2769 struct compound_hdr hdr = {
2770 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2771 };
2772
2773 encode_compound_hdr(xdr, req, &hdr);
2774 encode_sequence(xdr, &args->seq_args, &hdr);
2775 encode_putfh(xdr, args->fhandle, &hdr);
2776 if (args->lr_args)
2777 encode_layoutreturn(xdr, args->lr_args, &hdr);
2778 if (args->bitmask)
2779 encode_getfattr(xdr, args->bitmask, &hdr);
2780 encode_delegreturn(xdr, args->stateid, &hdr);
2781 encode_nops(&hdr);
2782}
2783
2784/*
2785 * Encode FS_LOCATIONS request
2786 */
2787static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2788 struct xdr_stream *xdr,
2789 const void *data)
2790{
2791 const struct nfs4_fs_locations_arg *args = data;
2792 struct compound_hdr hdr = {
2793 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2794 };
2795 uint32_t replen;
2796
2797 encode_compound_hdr(xdr, req, &hdr);
2798 encode_sequence(xdr, &args->seq_args, &hdr);
2799 if (args->migration) {
2800 encode_putfh(xdr, args->fh, &hdr);
2801 replen = hdr.replen;
2802 encode_fs_locations(xdr, args->bitmask, &hdr);
2803 if (args->renew)
2804 encode_renew(xdr, args->clientid, &hdr);
2805 } else {
2806 encode_putfh(xdr, args->dir_fh, &hdr);
2807 encode_lookup(xdr, args->name, &hdr);
2808 replen = hdr.replen;
2809 encode_fs_locations(xdr, args->bitmask, &hdr);
2810 }
2811
2812 rpc_prepare_reply_pages(req, (struct page **)&args->page, 0,
2813 PAGE_SIZE, replen + 1);
2814 encode_nops(&hdr);
2815}
2816
2817/*
2818 * Encode SECINFO request
2819 */
2820static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2821 struct xdr_stream *xdr,
2822 const void *data)
2823{
2824 const struct nfs4_secinfo_arg *args = data;
2825 struct compound_hdr hdr = {
2826 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2827 };
2828
2829 encode_compound_hdr(xdr, req, &hdr);
2830 encode_sequence(xdr, &args->seq_args, &hdr);
2831 encode_putfh(xdr, args->dir_fh, &hdr);
2832 encode_secinfo(xdr, args->name, &hdr);
2833 encode_nops(&hdr);
2834}
2835
2836/*
2837 * Encode FSID_PRESENT request
2838 */
2839static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2840 struct xdr_stream *xdr,
2841 const void *data)
2842{
2843 const struct nfs4_fsid_present_arg *args = data;
2844 struct compound_hdr hdr = {
2845 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2846 };
2847
2848 encode_compound_hdr(xdr, req, &hdr);
2849 encode_sequence(xdr, &args->seq_args, &hdr);
2850 encode_putfh(xdr, args->fh, &hdr);
2851 encode_getfh(xdr, &hdr);
2852 if (args->renew)
2853 encode_renew(xdr, args->clientid, &hdr);
2854 encode_nops(&hdr);
2855}
2856
2857#if defined(CONFIG_NFS_V4_1)
2858/*
2859 * BIND_CONN_TO_SESSION request
2860 */
2861static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2862 struct xdr_stream *xdr,
2863 const void *data)
2864{
2865 const struct nfs41_bind_conn_to_session_args *args = data;
2866 struct compound_hdr hdr = {
2867 .minorversion = args->client->cl_mvops->minor_version,
2868 };
2869
2870 encode_compound_hdr(xdr, req, &hdr);
2871 encode_bind_conn_to_session(xdr, args, &hdr);
2872 encode_nops(&hdr);
2873}
2874
2875/*
2876 * EXCHANGE_ID request
2877 */
2878static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2879 struct xdr_stream *xdr,
2880 const void *data)
2881{
2882 const struct nfs41_exchange_id_args *args = data;
2883 struct compound_hdr hdr = {
2884 .minorversion = args->client->cl_mvops->minor_version,
2885 };
2886
2887 encode_compound_hdr(xdr, req, &hdr);
2888 encode_exchange_id(xdr, args, &hdr);
2889 encode_nops(&hdr);
2890}
2891
2892/*
2893 * a CREATE_SESSION request
2894 */
2895static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2896 struct xdr_stream *xdr,
2897 const void *data)
2898{
2899 const struct nfs41_create_session_args *args = data;
2900 struct compound_hdr hdr = {
2901 .minorversion = args->client->cl_mvops->minor_version,
2902 };
2903
2904 encode_compound_hdr(xdr, req, &hdr);
2905 encode_create_session(xdr, args, &hdr);
2906 encode_nops(&hdr);
2907}
2908
2909/*
2910 * a DESTROY_SESSION request
2911 */
2912static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2913 struct xdr_stream *xdr,
2914 const void *data)
2915{
2916 const struct nfs4_session *session = data;
2917 struct compound_hdr hdr = {
2918 .minorversion = session->clp->cl_mvops->minor_version,
2919 };
2920
2921 encode_compound_hdr(xdr, req, &hdr);
2922 encode_destroy_session(xdr, session, &hdr);
2923 encode_nops(&hdr);
2924}
2925
2926/*
2927 * a DESTROY_CLIENTID request
2928 */
2929static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2930 struct xdr_stream *xdr,
2931 const void *data)
2932{
2933 const struct nfs_client *clp = data;
2934 struct compound_hdr hdr = {
2935 .minorversion = clp->cl_mvops->minor_version,
2936 };
2937
2938 encode_compound_hdr(xdr, req, &hdr);
2939 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2940 encode_nops(&hdr);
2941}
2942
2943/*
2944 * a SEQUENCE request
2945 */
2946static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2947 const void *data)
2948{
2949 const struct nfs4_sequence_args *args = data;
2950 struct compound_hdr hdr = {
2951 .minorversion = nfs4_xdr_minorversion(args),
2952 };
2953
2954 encode_compound_hdr(xdr, req, &hdr);
2955 encode_sequence(xdr, args, &hdr);
2956 encode_nops(&hdr);
2957}
2958
2959#endif
2960
2961/*
2962 * a GET_LEASE_TIME request
2963 */
2964static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2965 struct xdr_stream *xdr,
2966 const void *data)
2967{
2968 const struct nfs4_get_lease_time_args *args = data;
2969 struct compound_hdr hdr = {
2970 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2971 };
2972 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2973
2974 encode_compound_hdr(xdr, req, &hdr);
2975 encode_sequence(xdr, &args->la_seq_args, &hdr);
2976 encode_putrootfh(xdr, &hdr);
2977 encode_fsinfo(xdr, lease_bitmap, &hdr);
2978 encode_nops(&hdr);
2979}
2980
2981#ifdef CONFIG_NFS_V4_1
2982
2983/*
2984 * a RECLAIM_COMPLETE request
2985 */
2986static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2987 struct xdr_stream *xdr,
2988 const void *data)
2989{
2990 const struct nfs41_reclaim_complete_args *args = data;
2991 struct compound_hdr hdr = {
2992 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2993 };
2994
2995 encode_compound_hdr(xdr, req, &hdr);
2996 encode_sequence(xdr, &args->seq_args, &hdr);
2997 encode_reclaim_complete(xdr, args, &hdr);
2998 encode_nops(&hdr);
2999}
3000
3001/*
3002 * Encode GETDEVICEINFO request
3003 */
3004static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
3005 struct xdr_stream *xdr,
3006 const void *data)
3007{
3008 const struct nfs4_getdeviceinfo_args *args = data;
3009 struct compound_hdr hdr = {
3010 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3011 };
3012
3013 encode_compound_hdr(xdr, req, &hdr);
3014 encode_sequence(xdr, &args->seq_args, &hdr);
3015 encode_getdeviceinfo(xdr, args, &hdr);
3016
3017 /* set up reply kvec. Subtract notification bitmap max size (2)
3018 * so that notification bitmap is put in xdr_buf tail */
3019 rpc_prepare_reply_pages(req, args->pdev->pages, args->pdev->pgbase,
3020 args->pdev->pglen, hdr.replen - 2);
3021 encode_nops(&hdr);
3022}
3023
3024/*
3025 * Encode LAYOUTGET request
3026 */
3027static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
3028 struct xdr_stream *xdr,
3029 const void *data)
3030{
3031 const struct nfs4_layoutget_args *args = data;
3032 struct compound_hdr hdr = {
3033 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3034 };
3035
3036 encode_compound_hdr(xdr, req, &hdr);
3037 encode_sequence(xdr, &args->seq_args, &hdr);
3038 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3039 encode_layoutget(xdr, args, &hdr);
3040
3041 rpc_prepare_reply_pages(req, args->layout.pages, 0,
3042 args->layout.pglen, hdr.replen);
3043 encode_nops(&hdr);
3044}
3045
3046/*
3047 * Encode LAYOUTCOMMIT request
3048 */
3049static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3050 struct xdr_stream *xdr,
3051 const void *priv)
3052{
3053 const struct nfs4_layoutcommit_args *args = priv;
3054 struct nfs4_layoutcommit_data *data =
3055 container_of(args, struct nfs4_layoutcommit_data, args);
3056 struct compound_hdr hdr = {
3057 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3058 };
3059
3060 encode_compound_hdr(xdr, req, &hdr);
3061 encode_sequence(xdr, &args->seq_args, &hdr);
3062 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3063 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3064 encode_getfattr(xdr, args->bitmask, &hdr);
3065 encode_nops(&hdr);
3066}
3067
3068/*
3069 * Encode LAYOUTRETURN request
3070 */
3071static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3072 struct xdr_stream *xdr,
3073 const void *data)
3074{
3075 const struct nfs4_layoutreturn_args *args = data;
3076 struct compound_hdr hdr = {
3077 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3078 };
3079
3080 encode_compound_hdr(xdr, req, &hdr);
3081 encode_sequence(xdr, &args->seq_args, &hdr);
3082 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3083 encode_layoutreturn(xdr, args, &hdr);
3084 encode_nops(&hdr);
3085}
3086
3087/*
3088 * Encode SECINFO_NO_NAME request
3089 */
3090static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3091 struct xdr_stream *xdr,
3092 const void *data)
3093{
3094 const struct nfs41_secinfo_no_name_args *args = data;
3095 struct compound_hdr hdr = {
3096 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3097 };
3098
3099 encode_compound_hdr(xdr, req, &hdr);
3100 encode_sequence(xdr, &args->seq_args, &hdr);
3101 encode_putrootfh(xdr, &hdr);
3102 encode_secinfo_no_name(xdr, args, &hdr);
3103 encode_nops(&hdr);
3104}
3105
3106/*
3107 * Encode TEST_STATEID request
3108 */
3109static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3110 struct xdr_stream *xdr,
3111 const void *data)
3112{
3113 const struct nfs41_test_stateid_args *args = data;
3114 struct compound_hdr hdr = {
3115 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3116 };
3117
3118 encode_compound_hdr(xdr, req, &hdr);
3119 encode_sequence(xdr, &args->seq_args, &hdr);
3120 encode_test_stateid(xdr, args, &hdr);
3121 encode_nops(&hdr);
3122}
3123
3124/*
3125 * Encode FREE_STATEID request
3126 */
3127static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3128 struct xdr_stream *xdr,
3129 const void *data)
3130{
3131 const struct nfs41_free_stateid_args *args = data;
3132 struct compound_hdr hdr = {
3133 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3134 };
3135
3136 encode_compound_hdr(xdr, req, &hdr);
3137 encode_sequence(xdr, &args->seq_args, &hdr);
3138 encode_free_stateid(xdr, args, &hdr);
3139 encode_nops(&hdr);
3140}
3141#endif /* CONFIG_NFS_V4_1 */
3142
3143static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3144{
3145 ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3146 NFS4_OPAQUE_LIMIT);
3147 if (unlikely(ret < 0))
3148 return -EIO;
3149 *len = ret;
3150 return 0;
3151}
3152
3153static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3154{
3155 __be32 *p;
3156
3157 p = xdr_inline_decode(xdr, 8);
3158 if (unlikely(!p))
3159 return -EIO;
3160 hdr->status = be32_to_cpup(p++);
3161 hdr->taglen = be32_to_cpup(p);
3162
3163 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3164 if (unlikely(!p))
3165 return -EIO;
3166 hdr->tag = (char *)p;
3167 p += XDR_QUADLEN(hdr->taglen);
3168 hdr->nops = be32_to_cpup(p);
3169 if (unlikely(hdr->nops < 1))
3170 return nfs4_stat_to_errno(hdr->status);
3171 return 0;
3172}
3173
3174static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3175 int *nfs_retval)
3176{
3177 __be32 *p;
3178 uint32_t opnum;
3179 int32_t nfserr;
3180
3181 p = xdr_inline_decode(xdr, 8);
3182 if (unlikely(!p))
3183 goto out_overflow;
3184 opnum = be32_to_cpup(p++);
3185 if (unlikely(opnum != expected))
3186 goto out_bad_operation;
3187 if (unlikely(*p != cpu_to_be32(NFS_OK)))
3188 goto out_status;
3189 *nfs_retval = 0;
3190 return true;
3191out_status:
3192 nfserr = be32_to_cpup(p);
3193 trace_nfs4_xdr_status(xdr, opnum, nfserr);
3194 *nfs_retval = nfs4_stat_to_errno(nfserr);
3195 return true;
3196out_bad_operation:
3197 dprintk("nfs: Server returned operation"
3198 " %d but we issued a request for %d\n",
3199 opnum, expected);
3200 *nfs_retval = -EREMOTEIO;
3201 return false;
3202out_overflow:
3203 *nfs_retval = -EIO;
3204 return false;
3205}
3206
3207static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3208{
3209 int retval;
3210
3211 __decode_op_hdr(xdr, expected, &retval);
3212 return retval;
3213}
3214
3215/* Dummy routine */
3216static int decode_ace(struct xdr_stream *xdr, void *ace)
3217{
3218 __be32 *p;
3219 unsigned int strlen;
3220 char *str;
3221
3222 p = xdr_inline_decode(xdr, 12);
3223 if (unlikely(!p))
3224 return -EIO;
3225 return decode_opaque_inline(xdr, &strlen, &str);
3226}
3227
3228static ssize_t
3229decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
3230{
3231 ssize_t ret;
3232
3233 ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
3234 if (likely(ret >= 0))
3235 return ret;
3236 if (ret != -EMSGSIZE)
3237 return -EIO;
3238 return sz;
3239}
3240
3241static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3242{
3243 ssize_t ret;
3244 ret = decode_bitmap4(xdr, bitmap, 3);
3245 return ret < 0 ? ret : 0;
3246}
3247
3248static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3249{
3250 __be32 *p;
3251
3252 p = xdr_inline_decode(xdr, 4);
3253 if (unlikely(!p))
3254 return -EIO;
3255 *attrlen = be32_to_cpup(p);
3256 *savep = xdr_stream_pos(xdr);
3257 return 0;
3258}
3259
3260static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3261{
3262 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3263 int ret;
3264 ret = decode_attr_bitmap(xdr, bitmask);
3265 if (unlikely(ret < 0))
3266 return ret;
3267 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3268 } else
3269 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3270 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3271 bitmask[0], bitmask[1], bitmask[2]);
3272 return 0;
3273}
3274
3275static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3276{
3277 __be32 *p;
3278 int ret = 0;
3279
3280 *type = 0;
3281 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3282 return -EIO;
3283 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3284 p = xdr_inline_decode(xdr, 4);
3285 if (unlikely(!p))
3286 return -EIO;
3287 *type = be32_to_cpup(p);
3288 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3289 dprintk("%s: bad type %d\n", __func__, *type);
3290 return -EIO;
3291 }
3292 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3293 ret = NFS_ATTR_FATTR_TYPE;
3294 }
3295 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3296 return ret;
3297}
3298
3299static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3300 uint32_t *bitmap, uint32_t *type)
3301{
3302 __be32 *p;
3303
3304 *type = 0;
3305 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3306 return -EIO;
3307 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3308 p = xdr_inline_decode(xdr, 4);
3309 if (unlikely(!p))
3310 return -EIO;
3311 *type = be32_to_cpup(p);
3312 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3313 }
3314 dprintk("%s: expire type=0x%x\n", __func__, *type);
3315 return 0;
3316}
3317
3318static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3319{
3320 __be32 *p;
3321 int ret = 0;
3322
3323 *change = 0;
3324 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3325 return -EIO;
3326 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3327 p = xdr_inline_decode(xdr, 8);
3328 if (unlikely(!p))
3329 return -EIO;
3330 xdr_decode_hyper(p, change);
3331 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3332 ret = NFS_ATTR_FATTR_CHANGE;
3333 }
3334 dprintk("%s: change attribute=%Lu\n", __func__,
3335 (unsigned long long)*change);
3336 return ret;
3337}
3338
3339static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3340{
3341 __be32 *p;
3342 int ret = 0;
3343
3344 *size = 0;
3345 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3346 return -EIO;
3347 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3348 p = xdr_inline_decode(xdr, 8);
3349 if (unlikely(!p))
3350 return -EIO;
3351 xdr_decode_hyper(p, size);
3352 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3353 ret = NFS_ATTR_FATTR_SIZE;
3354 }
3355 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3356 return ret;
3357}
3358
3359static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3360{
3361 __be32 *p;
3362
3363 *res = 0;
3364 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3365 return -EIO;
3366 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3367 p = xdr_inline_decode(xdr, 4);
3368 if (unlikely(!p))
3369 return -EIO;
3370 *res = be32_to_cpup(p);
3371 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3372 }
3373 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3374 return 0;
3375}
3376
3377static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3378{
3379 __be32 *p;
3380
3381 *res = 0;
3382 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3383 return -EIO;
3384 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3385 p = xdr_inline_decode(xdr, 4);
3386 if (unlikely(!p))
3387 return -EIO;
3388 *res = be32_to_cpup(p);
3389 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3390 }
3391 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3392 return 0;
3393}
3394
3395static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3396{
3397 __be32 *p;
3398 int ret = 0;
3399
3400 fsid->major = 0;
3401 fsid->minor = 0;
3402 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3403 return -EIO;
3404 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3405 p = xdr_inline_decode(xdr, 16);
3406 if (unlikely(!p))
3407 return -EIO;
3408 p = xdr_decode_hyper(p, &fsid->major);
3409 xdr_decode_hyper(p, &fsid->minor);
3410 bitmap[0] &= ~FATTR4_WORD0_FSID;
3411 ret = NFS_ATTR_FATTR_FSID;
3412 }
3413 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3414 (unsigned long long)fsid->major,
3415 (unsigned long long)fsid->minor);
3416 return ret;
3417}
3418
3419static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3420{
3421 __be32 *p;
3422
3423 *res = 60;
3424 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3425 return -EIO;
3426 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3427 p = xdr_inline_decode(xdr, 4);
3428 if (unlikely(!p))
3429 return -EIO;
3430 *res = be32_to_cpup(p);
3431 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3432 }
3433 dprintk("%s: lease time=%u\n", __func__, (unsigned int)*res);
3434 return 0;
3435}
3436
3437static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3438{
3439 __be32 *p;
3440
3441 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3442 return -EIO;
3443 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3444 p = xdr_inline_decode(xdr, 4);
3445 if (unlikely(!p))
3446 return -EIO;
3447 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3448 *res = -be32_to_cpup(p);
3449 }
3450 return 0;
3451}
3452
3453static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3454 uint32_t *bitmap, uint32_t *bitmask)
3455{
3456 if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3457 int ret;
3458 ret = decode_attr_bitmap(xdr, bitmask);
3459 if (unlikely(ret < 0))
3460 return ret;
3461 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3462 } else
3463 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3464 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3465 bitmask[0], bitmask[1], bitmask[2]);
3466 return 0;
3467}
3468
3469static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3470{
3471 __be32 *p;
3472 u32 len;
3473
3474 if (fh != NULL)
3475 memset(fh, 0, sizeof(*fh));
3476
3477 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3478 return -EIO;
3479 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3480 p = xdr_inline_decode(xdr, 4);
3481 if (unlikely(!p))
3482 return -EIO;
3483 len = be32_to_cpup(p);
3484 if (len > NFS4_FHSIZE)
3485 return -EIO;
3486 p = xdr_inline_decode(xdr, len);
3487 if (unlikely(!p))
3488 return -EIO;
3489 if (fh != NULL) {
3490 memcpy(fh->data, p, len);
3491 fh->size = len;
3492 }
3493 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3494 }
3495 return 0;
3496}
3497
3498static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3499{
3500 __be32 *p;
3501
3502 *res = 0;
3503 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3504 return -EIO;
3505 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3506 p = xdr_inline_decode(xdr, 4);
3507 if (unlikely(!p))
3508 return -EIO;
3509 *res = be32_to_cpup(p);
3510 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3511 }
3512 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3513 return 0;
3514}
3515
3516static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3517{
3518 __be32 *p;
3519 int ret = 0;
3520
3521 *fileid = 0;
3522 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3523 return -EIO;
3524 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3525 p = xdr_inline_decode(xdr, 8);
3526 if (unlikely(!p))
3527 return -EIO;
3528 xdr_decode_hyper(p, fileid);
3529 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3530 ret = NFS_ATTR_FATTR_FILEID;
3531 }
3532 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3533 return ret;
3534}
3535
3536static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3537{
3538 __be32 *p;
3539 int ret = 0;
3540
3541 *fileid = 0;
3542 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3543 return -EIO;
3544 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3545 p = xdr_inline_decode(xdr, 8);
3546 if (unlikely(!p))
3547 return -EIO;
3548 xdr_decode_hyper(p, fileid);
3549 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3550 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3551 }
3552 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3553 return ret;
3554}
3555
3556static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3557{
3558 __be32 *p;
3559 int status = 0;
3560
3561 *res = 0;
3562 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3563 return -EIO;
3564 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3565 p = xdr_inline_decode(xdr, 8);
3566 if (unlikely(!p))
3567 return -EIO;
3568 xdr_decode_hyper(p, res);
3569 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3570 }
3571 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3572 return status;
3573}
3574
3575static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3576{
3577 __be32 *p;
3578 int status = 0;
3579
3580 *res = 0;
3581 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3582 return -EIO;
3583 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3584 p = xdr_inline_decode(xdr, 8);
3585 if (unlikely(!p))
3586 return -EIO;
3587 xdr_decode_hyper(p, res);
3588 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3589 }
3590 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3591 return status;
3592}
3593
3594static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3595{
3596 __be32 *p;
3597 int status = 0;
3598
3599 *res = 0;
3600 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3601 return -EIO;
3602 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3603 p = xdr_inline_decode(xdr, 8);
3604 if (unlikely(!p))
3605 return -EIO;
3606 xdr_decode_hyper(p, res);
3607 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3608 }
3609 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3610 return status;
3611}
3612
3613static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3614{
3615 u32 n;
3616 __be32 *p;
3617 int status = 0;
3618
3619 p = xdr_inline_decode(xdr, 4);
3620 if (unlikely(!p))
3621 return -EIO;
3622 n = be32_to_cpup(p);
3623 if (n == 0)
3624 goto root_path;
3625 dprintk("pathname4: ");
3626 if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3627 dprintk("cannot parse %d components in path\n", n);
3628 goto out_eio;
3629 }
3630 for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3631 struct nfs4_string *component = &path->components[path->ncomponents];
3632 status = decode_opaque_inline(xdr, &component->len, &component->data);
3633 if (unlikely(status != 0))
3634 goto out_eio;
3635 ifdebug (XDR)
3636 pr_cont("%s%.*s ",
3637 (path->ncomponents != n ? "/ " : ""),
3638 component->len, component->data);
3639 }
3640out:
3641 return status;
3642root_path:
3643/* a root pathname is sent as a zero component4 */
3644 path->ncomponents = 1;
3645 path->components[0].len=0;
3646 path->components[0].data=NULL;
3647 dprintk("pathname4: /\n");
3648 goto out;
3649out_eio:
3650 dprintk(" status %d", status);
3651 status = -EIO;
3652 goto out;
3653}
3654
3655static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3656{
3657 int n;
3658 __be32 *p;
3659 int status = -EIO;
3660
3661 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3662 goto out;
3663 status = 0;
3664 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3665 goto out;
3666 bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3667 status = -EIO;
3668 /* Ignore borken servers that return unrequested attrs */
3669 if (unlikely(res == NULL))
3670 goto out;
3671 dprintk("%s: fsroot:\n", __func__);
3672 status = decode_pathname(xdr, &res->fs_path);
3673 if (unlikely(status != 0))
3674 goto out;
3675 p = xdr_inline_decode(xdr, 4);
3676 if (unlikely(!p))
3677 goto out_eio;
3678 n = be32_to_cpup(p);
3679 if (n <= 0)
3680 goto out_eio;
3681 for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3682 u32 m;
3683 struct nfs4_fs_location *loc;
3684
3685 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3686 break;
3687 loc = &res->locations[res->nlocations];
3688 p = xdr_inline_decode(xdr, 4);
3689 if (unlikely(!p))
3690 goto out_eio;
3691 m = be32_to_cpup(p);
3692
3693 dprintk("%s: servers:\n", __func__);
3694 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3695 struct nfs4_string *server;
3696
3697 if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3698 unsigned int i;
3699 dprintk("%s: using first %u of %u servers "
3700 "returned for location %u\n",
3701 __func__,
3702 NFS4_FS_LOCATION_MAXSERVERS,
3703 m, res->nlocations);
3704 for (i = loc->nservers; i < m; i++) {
3705 unsigned int len;
3706 char *data;
3707 status = decode_opaque_inline(xdr, &len, &data);
3708 if (unlikely(status != 0))
3709 goto out_eio;
3710 }
3711 break;
3712 }
3713 server = &loc->servers[loc->nservers];
3714 status = decode_opaque_inline(xdr, &server->len, &server->data);
3715 if (unlikely(status != 0))
3716 goto out_eio;
3717 dprintk("%s ", server->data);
3718 }
3719 status = decode_pathname(xdr, &loc->rootpath);
3720 if (unlikely(status != 0))
3721 goto out_eio;
3722 }
3723 if (res->nlocations != 0)
3724 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3725out:
3726 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3727 return status;
3728out_eio:
3729 status = -EIO;
3730 goto out;
3731}
3732
3733static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3734{
3735 __be32 *p;
3736 int status = 0;
3737
3738 *res = 0;
3739 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3740 return -EIO;
3741 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3742 p = xdr_inline_decode(xdr, 8);
3743 if (unlikely(!p))
3744 return -EIO;
3745 xdr_decode_hyper(p, res);
3746 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3747 }
3748 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3749 return status;
3750}
3751
3752static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3753{
3754 __be32 *p;
3755 int status = 0;
3756
3757 *maxlink = 1;
3758 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3759 return -EIO;
3760 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3761 p = xdr_inline_decode(xdr, 4);
3762 if (unlikely(!p))
3763 return -EIO;
3764 *maxlink = be32_to_cpup(p);
3765 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3766 }
3767 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3768 return status;
3769}
3770
3771static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3772{
3773 __be32 *p;
3774 int status = 0;
3775
3776 *maxname = 1024;
3777 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3778 return -EIO;
3779 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3780 p = xdr_inline_decode(xdr, 4);
3781 if (unlikely(!p))
3782 return -EIO;
3783 *maxname = be32_to_cpup(p);
3784 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3785 }
3786 dprintk("%s: maxname=%u\n", __func__, *maxname);
3787 return status;
3788}
3789
3790static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3791{
3792 __be32 *p;
3793 int status = 0;
3794
3795 *res = 1024;
3796 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3797 return -EIO;
3798 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3799 uint64_t maxread;
3800 p = xdr_inline_decode(xdr, 8);
3801 if (unlikely(!p))
3802 return -EIO;
3803 xdr_decode_hyper(p, &maxread);
3804 if (maxread > 0x7FFFFFFF)
3805 maxread = 0x7FFFFFFF;
3806 *res = (uint32_t)maxread;
3807 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3808 }
3809 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3810 return status;
3811}
3812
3813static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3814{
3815 __be32 *p;
3816 int status = 0;
3817
3818 *res = 1024;
3819 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3820 return -EIO;
3821 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3822 uint64_t maxwrite;
3823 p = xdr_inline_decode(xdr, 8);
3824 if (unlikely(!p))
3825 return -EIO;
3826 xdr_decode_hyper(p, &maxwrite);
3827 if (maxwrite > 0x7FFFFFFF)
3828 maxwrite = 0x7FFFFFFF;
3829 *res = (uint32_t)maxwrite;
3830 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3831 }
3832 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3833 return status;
3834}
3835
3836static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3837{
3838 uint32_t tmp;
3839 __be32 *p;
3840 int ret = 0;
3841
3842 *mode = 0;
3843 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3844 return -EIO;
3845 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3846 p = xdr_inline_decode(xdr, 4);
3847 if (unlikely(!p))
3848 return -EIO;
3849 tmp = be32_to_cpup(p);
3850 *mode = tmp & ~S_IFMT;
3851 bitmap[1] &= ~FATTR4_WORD1_MODE;
3852 ret = NFS_ATTR_FATTR_MODE;
3853 }
3854 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3855 return ret;
3856}
3857
3858static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3859{
3860 __be32 *p;
3861 int ret = 0;
3862
3863 *nlink = 1;
3864 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3865 return -EIO;
3866 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3867 p = xdr_inline_decode(xdr, 4);
3868 if (unlikely(!p))
3869 return -EIO;
3870 *nlink = be32_to_cpup(p);
3871 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3872 ret = NFS_ATTR_FATTR_NLINK;
3873 }
3874 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3875 return ret;
3876}
3877
3878static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3879 struct nfs4_string *name, gfp_t gfp_flags)
3880{
3881 ssize_t ret;
3882
3883 ret = xdr_stream_decode_string_dup(xdr, &name->data,
3884 XDR_MAX_NETOBJ, gfp_flags);
3885 name->len = 0;
3886 if (ret > 0)
3887 name->len = ret;
3888 return ret;
3889}
3890
3891static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3892 const struct nfs_server *server, kuid_t *uid,
3893 struct nfs4_string *owner_name)
3894{
3895 ssize_t len;
3896 char *p;
3897
3898 *uid = make_kuid(&init_user_ns, -2);
3899 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3900 return -EIO;
3901 if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3902 return 0;
3903 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3904
3905 if (owner_name != NULL) {
3906 len = decode_nfs4_string(xdr, owner_name, GFP_NOIO);
3907 if (len <= 0)
3908 goto out;
3909 dprintk("%s: name=%s\n", __func__, owner_name->data);
3910 return NFS_ATTR_FATTR_OWNER_NAME;
3911 } else {
3912 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3913 XDR_MAX_NETOBJ);
3914 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3915 goto out;
3916 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3917 return NFS_ATTR_FATTR_OWNER;
3918 }
3919out:
3920 if (len == -EBADMSG)
3921 return -EIO;
3922 return 0;
3923}
3924
3925static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3926 const struct nfs_server *server, kgid_t *gid,
3927 struct nfs4_string *group_name)
3928{
3929 ssize_t len;
3930 char *p;
3931
3932 *gid = make_kgid(&init_user_ns, -2);
3933 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3934 return -EIO;
3935 if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
3936 return 0;
3937 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3938
3939 if (group_name != NULL) {
3940 len = decode_nfs4_string(xdr, group_name, GFP_NOIO);
3941 if (len <= 0)
3942 goto out;
3943 dprintk("%s: name=%s\n", __func__, group_name->data);
3944 return NFS_ATTR_FATTR_GROUP_NAME;
3945 } else {
3946 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3947 XDR_MAX_NETOBJ);
3948 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
3949 goto out;
3950 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3951 return NFS_ATTR_FATTR_GROUP;
3952 }
3953out:
3954 if (len == -EBADMSG)
3955 return -EIO;
3956 return 0;
3957}
3958
3959static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3960{
3961 uint32_t major = 0, minor = 0;
3962 __be32 *p;
3963 int ret = 0;
3964
3965 *rdev = MKDEV(0,0);
3966 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3967 return -EIO;
3968 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3969 dev_t tmp;
3970
3971 p = xdr_inline_decode(xdr, 8);
3972 if (unlikely(!p))
3973 return -EIO;
3974 major = be32_to_cpup(p++);
3975 minor = be32_to_cpup(p);
3976 tmp = MKDEV(major, minor);
3977 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3978 *rdev = tmp;
3979 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3980 ret = NFS_ATTR_FATTR_RDEV;
3981 }
3982 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3983 return ret;
3984}
3985
3986static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3987{
3988 __be32 *p;
3989 int status = 0;
3990
3991 *res = 0;
3992 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3993 return -EIO;
3994 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3995 p = xdr_inline_decode(xdr, 8);
3996 if (unlikely(!p))
3997 return -EIO;
3998 xdr_decode_hyper(p, res);
3999 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4000 }
4001 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4002 return status;
4003}
4004
4005static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4006{
4007 __be32 *p;
4008 int status = 0;
4009
4010 *res = 0;
4011 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4012 return -EIO;
4013 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4014 p = xdr_inline_decode(xdr, 8);
4015 if (unlikely(!p))
4016 return -EIO;
4017 xdr_decode_hyper(p, res);
4018 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4019 }
4020 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4021 return status;
4022}
4023
4024static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4025{
4026 __be32 *p;
4027 int status = 0;
4028
4029 *res = 0;
4030 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4031 return -EIO;
4032 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4033 p = xdr_inline_decode(xdr, 8);
4034 if (unlikely(!p))
4035 return -EIO;
4036 xdr_decode_hyper(p, res);
4037 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4038 }
4039 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4040 return status;
4041}
4042
4043static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4044{
4045 __be32 *p;
4046 int ret = 0;
4047
4048 *used = 0;
4049 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4050 return -EIO;
4051 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4052 p = xdr_inline_decode(xdr, 8);
4053 if (unlikely(!p))
4054 return -EIO;
4055 xdr_decode_hyper(p, used);
4056 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4057 ret = NFS_ATTR_FATTR_SPACE_USED;
4058 }
4059 dprintk("%s: space used=%Lu\n", __func__,
4060 (unsigned long long)*used);
4061 return ret;
4062}
4063
4064static __be32 *
4065xdr_decode_nfstime4(__be32 *p, struct timespec64 *t)
4066{
4067 __u64 sec;
4068
4069 p = xdr_decode_hyper(p, &sec);
4070 t-> tv_sec = sec;
4071 t->tv_nsec = be32_to_cpup(p++);
4072 return p;
4073}
4074
4075static int decode_attr_time(struct xdr_stream *xdr, struct timespec64 *time)
4076{
4077 __be32 *p;
4078
4079 p = xdr_inline_decode(xdr, nfstime4_maxsz << 2);
4080 if (unlikely(!p))
4081 return -EIO;
4082 xdr_decode_nfstime4(p, time);
4083 return 0;
4084}
4085
4086static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4087{
4088 int status = 0;
4089
4090 time->tv_sec = 0;
4091 time->tv_nsec = 0;
4092 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4093 return -EIO;
4094 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4095 status = decode_attr_time(xdr, time);
4096 if (status == 0)
4097 status = NFS_ATTR_FATTR_ATIME;
4098 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4099 }
4100 dprintk("%s: atime=%lld\n", __func__, time->tv_sec);
4101 return status;
4102}
4103
4104static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4105{
4106 int status = 0;
4107
4108 time->tv_sec = 0;
4109 time->tv_nsec = 0;
4110 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4111 return -EIO;
4112 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4113 status = decode_attr_time(xdr, time);
4114 if (status == 0)
4115 status = NFS_ATTR_FATTR_CTIME;
4116 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4117 }
4118 dprintk("%s: ctime=%lld\n", __func__, time->tv_sec);
4119 return status;
4120}
4121
4122static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4123 struct timespec64 *time)
4124{
4125 int status = 0;
4126
4127 time->tv_sec = 0;
4128 time->tv_nsec = 0;
4129 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4130 return -EIO;
4131 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4132 status = decode_attr_time(xdr, time);
4133 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4134 }
4135 dprintk("%s: time_delta=%lld %ld\n", __func__, time->tv_sec,
4136 time->tv_nsec);
4137 return status;
4138}
4139
4140static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4141 struct nfs4_label *label)
4142{
4143 uint32_t pi = 0;
4144 uint32_t lfs = 0;
4145 __u32 len;
4146 __be32 *p;
4147 int status = 0;
4148
4149 if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4150 return -EIO;
4151 if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4152 p = xdr_inline_decode(xdr, 4);
4153 if (unlikely(!p))
4154 return -EIO;
4155 lfs = be32_to_cpup(p++);
4156 p = xdr_inline_decode(xdr, 4);
4157 if (unlikely(!p))
4158 return -EIO;
4159 pi = be32_to_cpup(p++);
4160 p = xdr_inline_decode(xdr, 4);
4161 if (unlikely(!p))
4162 return -EIO;
4163 len = be32_to_cpup(p++);
4164 p = xdr_inline_decode(xdr, len);
4165 if (unlikely(!p))
4166 return -EIO;
4167 if (len < NFS4_MAXLABELLEN) {
4168 if (label) {
4169 if (label->len) {
4170 if (label->len < len)
4171 return -ERANGE;
4172 memcpy(label->label, p, len);
4173 }
4174 label->len = len;
4175 label->pi = pi;
4176 label->lfs = lfs;
4177 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4178 }
4179 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4180 } else
4181 printk(KERN_WARNING "%s: label too long (%u)!\n",
4182 __func__, len);
4183 }
4184 if (label && label->label)
4185 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4186 (char *)label->label, label->len, label->pi, label->lfs);
4187 return status;
4188}
4189
4190static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
4191{
4192 int status = 0;
4193
4194 time->tv_sec = 0;
4195 time->tv_nsec = 0;
4196 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4197 return -EIO;
4198 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4199 status = decode_attr_time(xdr, time);
4200 if (status == 0)
4201 status = NFS_ATTR_FATTR_MTIME;
4202 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4203 }
4204 dprintk("%s: mtime=%lld\n", __func__, time->tv_sec);
4205 return status;
4206}
4207
4208static int decode_attr_xattrsupport(struct xdr_stream *xdr, uint32_t *bitmap,
4209 uint32_t *res)
4210{
4211 __be32 *p;
4212
4213 *res = 0;
4214 if (unlikely(bitmap[2] & (FATTR4_WORD2_XATTR_SUPPORT - 1U)))
4215 return -EIO;
4216 if (likely(bitmap[2] & FATTR4_WORD2_XATTR_SUPPORT)) {
4217 p = xdr_inline_decode(xdr, 4);
4218 if (unlikely(!p))
4219 return -EIO;
4220 *res = be32_to_cpup(p);
4221 bitmap[2] &= ~FATTR4_WORD2_XATTR_SUPPORT;
4222 }
4223 dprintk("%s: XATTR support=%s\n", __func__,
4224 *res == 0 ? "false" : "true");
4225 return 0;
4226}
4227
4228static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4229{
4230 unsigned int attrwords = XDR_QUADLEN(attrlen);
4231 unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4232
4233 if (unlikely(attrwords != nwords)) {
4234 dprintk("%s: server returned incorrect attribute length: "
4235 "%u %c %u\n",
4236 __func__,
4237 attrwords << 2,
4238 (attrwords < nwords) ? '<' : '>',
4239 nwords << 2);
4240 return -EIO;
4241 }
4242 return 0;
4243}
4244
4245static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4246{
4247 __be32 *p;
4248
4249 p = xdr_inline_decode(xdr, 20);
4250 if (unlikely(!p))
4251 return -EIO;
4252 cinfo->atomic = be32_to_cpup(p++);
4253 p = xdr_decode_hyper(p, &cinfo->before);
4254 xdr_decode_hyper(p, &cinfo->after);
4255 return 0;
4256}
4257
4258static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4259{
4260 __be32 *p;
4261 uint32_t supp, acc;
4262 int status;
4263
4264 status = decode_op_hdr(xdr, OP_ACCESS);
4265 if (status)
4266 return status;
4267 p = xdr_inline_decode(xdr, 8);
4268 if (unlikely(!p))
4269 return -EIO;
4270 supp = be32_to_cpup(p++);
4271 acc = be32_to_cpup(p);
4272 *supported = supp;
4273 *access = acc;
4274 return 0;
4275}
4276
4277static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4278{
4279 ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4280 if (unlikely(ret < 0))
4281 return -EIO;
4282 return 0;
4283}
4284
4285static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4286{
4287 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4288}
4289
4290static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4291{
4292 stateid->type = NFS4_OPEN_STATEID_TYPE;
4293 return decode_stateid(xdr, stateid);
4294}
4295
4296static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4297{
4298 stateid->type = NFS4_LOCK_STATEID_TYPE;
4299 return decode_stateid(xdr, stateid);
4300}
4301
4302static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4303{
4304 stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4305 return decode_stateid(xdr, stateid);
4306}
4307
4308static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4309{
4310 nfs4_stateid dummy;
4311
4312 nfs4_stateid_copy(stateid, &invalid_stateid);
4313 return decode_stateid(xdr, &dummy);
4314}
4315
4316static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4317{
4318 int status;
4319
4320 status = decode_op_hdr(xdr, OP_CLOSE);
4321 if (status != -EIO)
4322 nfs_increment_open_seqid(status, res->seqid);
4323 if (!status)
4324 status = decode_invalid_stateid(xdr, &res->stateid);
4325 return status;
4326}
4327
4328static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4329{
4330 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4331}
4332
4333static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4334{
4335 return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4336}
4337
4338static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4339{
4340 struct nfs_writeverf *verf = res->verf;
4341 int status;
4342
4343 status = decode_op_hdr(xdr, OP_COMMIT);
4344 if (!status)
4345 status = decode_write_verifier(xdr, &verf->verifier);
4346 if (!status)
4347 verf->committed = NFS_FILE_SYNC;
4348 return status;
4349}
4350
4351static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4352{
4353 __be32 *p;
4354 uint32_t bmlen;
4355 int status;
4356
4357 status = decode_op_hdr(xdr, OP_CREATE);
4358 if (status)
4359 return status;
4360 if ((status = decode_change_info(xdr, cinfo)))
4361 return status;
4362 p = xdr_inline_decode(xdr, 4);
4363 if (unlikely(!p))
4364 return -EIO;
4365 bmlen = be32_to_cpup(p);
4366 p = xdr_inline_decode(xdr, bmlen << 2);
4367 if (likely(p))
4368 return 0;
4369 return -EIO;
4370}
4371
4372static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4373{
4374 unsigned int savep;
4375 uint32_t attrlen, bitmap[3] = {0};
4376 int status;
4377
4378 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4379 goto xdr_error;
4380 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4381 goto xdr_error;
4382 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4383 goto xdr_error;
4384 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4385 goto xdr_error;
4386 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4387 &res->fh_expire_type)) != 0)
4388 goto xdr_error;
4389 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4390 goto xdr_error;
4391 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4392 goto xdr_error;
4393 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4394 goto xdr_error;
4395 if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4396 res->exclcreat_bitmask)) != 0)
4397 goto xdr_error;
4398 status = verify_attr_len(xdr, savep, attrlen);
4399xdr_error:
4400 dprintk("%s: xdr returned %d!\n", __func__, -status);
4401 return status;
4402}
4403
4404static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4405{
4406 unsigned int savep;
4407 uint32_t attrlen, bitmap[3] = {0};
4408 int status;
4409
4410 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4411 goto xdr_error;
4412 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4413 goto xdr_error;
4414 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4415 goto xdr_error;
4416
4417 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4418 goto xdr_error;
4419 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4420 goto xdr_error;
4421 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4422 goto xdr_error;
4423
4424 status = -EIO;
4425 if (unlikely(bitmap[0]))
4426 goto xdr_error;
4427
4428 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4429 goto xdr_error;
4430 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4431 goto xdr_error;
4432 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4433 goto xdr_error;
4434
4435 status = verify_attr_len(xdr, savep, attrlen);
4436xdr_error:
4437 dprintk("%s: xdr returned %d!\n", __func__, -status);
4438 return status;
4439}
4440
4441static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4442{
4443 unsigned int savep;
4444 uint32_t attrlen, bitmap[3] = {0};
4445 int status;
4446
4447 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4448 goto xdr_error;
4449 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4450 goto xdr_error;
4451 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4452 goto xdr_error;
4453
4454 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4455 goto xdr_error;
4456 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4457 goto xdr_error;
4458
4459 status = verify_attr_len(xdr, savep, attrlen);
4460xdr_error:
4461 dprintk("%s: xdr returned %d!\n", __func__, -status);
4462 return status;
4463}
4464
4465static int decode_threshold_hint(struct xdr_stream *xdr,
4466 uint32_t *bitmap,
4467 uint64_t *res,
4468 uint32_t hint_bit)
4469{
4470 __be32 *p;
4471
4472 *res = 0;
4473 if (likely(bitmap[0] & hint_bit)) {
4474 p = xdr_inline_decode(xdr, 8);
4475 if (unlikely(!p))
4476 return -EIO;
4477 xdr_decode_hyper(p, res);
4478 }
4479 return 0;
4480}
4481
4482static int decode_first_threshold_item4(struct xdr_stream *xdr,
4483 struct nfs4_threshold *res)
4484{
4485 __be32 *p;
4486 unsigned int savep;
4487 uint32_t bitmap[3] = {0,}, attrlen;
4488 int status;
4489
4490 /* layout type */
4491 p = xdr_inline_decode(xdr, 4);
4492 if (unlikely(!p))
4493 return -EIO;
4494 res->l_type = be32_to_cpup(p);
4495
4496 /* thi_hintset bitmap */
4497 status = decode_attr_bitmap(xdr, bitmap);
4498 if (status < 0)
4499 goto xdr_error;
4500
4501 /* thi_hintlist length */
4502 status = decode_attr_length(xdr, &attrlen, &savep);
4503 if (status < 0)
4504 goto xdr_error;
4505 /* thi_hintlist */
4506 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4507 if (status < 0)
4508 goto xdr_error;
4509 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4510 if (status < 0)
4511 goto xdr_error;
4512 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4513 THRESHOLD_RD_IO);
4514 if (status < 0)
4515 goto xdr_error;
4516 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4517 THRESHOLD_WR_IO);
4518 if (status < 0)
4519 goto xdr_error;
4520
4521 status = verify_attr_len(xdr, savep, attrlen);
4522 res->bm = bitmap[0];
4523
4524 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4525 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4526 res->wr_io_sz);
4527xdr_error:
4528 dprintk("%s ret=%d!\n", __func__, status);
4529 return status;
4530}
4531
4532/*
4533 * Thresholds on pNFS direct I/O vrs MDS I/O
4534 */
4535static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4536 uint32_t *bitmap,
4537 struct nfs4_threshold *res)
4538{
4539 __be32 *p;
4540 int status = 0;
4541 uint32_t num;
4542
4543 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4544 return -EIO;
4545 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4546 /* Did the server return an unrequested attribute? */
4547 if (unlikely(res == NULL))
4548 return -EREMOTEIO;
4549 p = xdr_inline_decode(xdr, 4);
4550 if (unlikely(!p))
4551 return -EIO;
4552 num = be32_to_cpup(p);
4553 if (num == 0)
4554 return 0;
4555 if (num > 1)
4556 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4557 "drivers per filesystem not supported\n",
4558 __func__);
4559
4560 status = decode_first_threshold_item4(xdr, res);
4561 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4562 }
4563 return status;
4564}
4565
4566static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4567 struct nfs_fattr *fattr, struct nfs_fh *fh,
4568 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4569 const struct nfs_server *server)
4570{
4571 int status;
4572 umode_t fmode = 0;
4573 uint32_t type;
4574 int32_t err;
4575
4576 status = decode_attr_type(xdr, bitmap, &type);
4577 if (status < 0)
4578 goto xdr_error;
4579 fattr->mode = 0;
4580 if (status != 0) {
4581 fattr->mode |= nfs_type2fmt[type];
4582 fattr->valid |= status;
4583 }
4584
4585 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4586 if (status < 0)
4587 goto xdr_error;
4588 fattr->valid |= status;
4589
4590 status = decode_attr_size(xdr, bitmap, &fattr->size);
4591 if (status < 0)
4592 goto xdr_error;
4593 fattr->valid |= status;
4594
4595 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4596 if (status < 0)
4597 goto xdr_error;
4598 fattr->valid |= status;
4599
4600 err = 0;
4601 status = decode_attr_error(xdr, bitmap, &err);
4602 if (status < 0)
4603 goto xdr_error;
4604
4605 status = decode_attr_filehandle(xdr, bitmap, fh);
4606 if (status < 0)
4607 goto xdr_error;
4608
4609 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4610 if (status < 0)
4611 goto xdr_error;
4612 fattr->valid |= status;
4613
4614 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4615 if (status < 0)
4616 goto xdr_error;
4617 fattr->valid |= status;
4618
4619 status = -EIO;
4620 if (unlikely(bitmap[0]))
4621 goto xdr_error;
4622
4623 status = decode_attr_mode(xdr, bitmap, &fmode);
4624 if (status < 0)
4625 goto xdr_error;
4626 if (status != 0) {
4627 fattr->mode |= fmode;
4628 fattr->valid |= status;
4629 }
4630
4631 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4632 if (status < 0)
4633 goto xdr_error;
4634 fattr->valid |= status;
4635
4636 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4637 if (status < 0)
4638 goto xdr_error;
4639 fattr->valid |= status;
4640
4641 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4642 if (status < 0)
4643 goto xdr_error;
4644 fattr->valid |= status;
4645
4646 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4647 if (status < 0)
4648 goto xdr_error;
4649 fattr->valid |= status;
4650
4651 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4652 if (status < 0)
4653 goto xdr_error;
4654 fattr->valid |= status;
4655
4656 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4657 if (status < 0)
4658 goto xdr_error;
4659 fattr->valid |= status;
4660
4661 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4662 if (status < 0)
4663 goto xdr_error;
4664 fattr->valid |= status;
4665
4666 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4667 if (status < 0)
4668 goto xdr_error;
4669 fattr->valid |= status;
4670
4671 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4672 if (status < 0)
4673 goto xdr_error;
4674 fattr->valid |= status;
4675
4676 status = -EIO;
4677 if (unlikely(bitmap[1]))
4678 goto xdr_error;
4679
4680 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4681 if (status < 0)
4682 goto xdr_error;
4683
4684 if (label) {
4685 status = decode_attr_security_label(xdr, bitmap, label);
4686 if (status < 0)
4687 goto xdr_error;
4688 fattr->valid |= status;
4689 }
4690
4691xdr_error:
4692 dprintk("%s: xdr returned %d\n", __func__, -status);
4693 return status;
4694}
4695
4696static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4697 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4698 struct nfs4_label *label, const struct nfs_server *server)
4699{
4700 unsigned int savep;
4701 uint32_t attrlen,
4702 bitmap[3] = {0};
4703 int status;
4704
4705 status = decode_op_hdr(xdr, OP_GETATTR);
4706 if (status < 0)
4707 goto xdr_error;
4708
4709 status = decode_attr_bitmap(xdr, bitmap);
4710 if (status < 0)
4711 goto xdr_error;
4712
4713 status = decode_attr_length(xdr, &attrlen, &savep);
4714 if (status < 0)
4715 goto xdr_error;
4716
4717 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4718 label, server);
4719 if (status < 0)
4720 goto xdr_error;
4721
4722 status = verify_attr_len(xdr, savep, attrlen);
4723xdr_error:
4724 dprintk("%s: xdr returned %d\n", __func__, -status);
4725 return status;
4726}
4727
4728static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4729 struct nfs4_label *label, const struct nfs_server *server)
4730{
4731 return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4732}
4733
4734static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4735 const struct nfs_server *server)
4736{
4737 return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4738}
4739
4740/*
4741 * Decode potentially multiple layout types.
4742 */
4743static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4744 struct nfs_fsinfo *fsinfo)
4745{
4746 __be32 *p;
4747 uint32_t i;
4748
4749 p = xdr_inline_decode(xdr, 4);
4750 if (unlikely(!p))
4751 return -EIO;
4752 fsinfo->nlayouttypes = be32_to_cpup(p);
4753
4754 /* pNFS is not supported by the underlying file system */
4755 if (fsinfo->nlayouttypes == 0)
4756 return 0;
4757
4758 /* Decode and set first layout type, move xdr->p past unused types */
4759 p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4760 if (unlikely(!p))
4761 return -EIO;
4762
4763 /* If we get too many, then just cap it at the max */
4764 if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4765 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4766 __func__, fsinfo->nlayouttypes);
4767 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4768 }
4769
4770 for(i = 0; i < fsinfo->nlayouttypes; ++i)
4771 fsinfo->layouttype[i] = be32_to_cpup(p++);
4772 return 0;
4773}
4774
4775/*
4776 * The type of file system exported.
4777 * Note we must ensure that layouttype is set in any non-error case.
4778 */
4779static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4780 struct nfs_fsinfo *fsinfo)
4781{
4782 int status = 0;
4783
4784 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4785 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4786 return -EIO;
4787 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4788 status = decode_pnfs_layout_types(xdr, fsinfo);
4789 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4790 }
4791 return status;
4792}
4793
4794/*
4795 * The prefered block size for layout directed io
4796 */
4797static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4798 uint32_t *res)
4799{
4800 __be32 *p;
4801
4802 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4803 *res = 0;
4804 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4805 p = xdr_inline_decode(xdr, 4);
4806 if (unlikely(!p))
4807 return -EIO;
4808 *res = be32_to_cpup(p);
4809 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4810 }
4811 return 0;
4812}
4813
4814/*
4815 * The granularity of a CLONE operation.
4816 */
4817static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4818 uint32_t *res)
4819{
4820 __be32 *p;
4821
4822 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4823 *res = 0;
4824 if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4825 p = xdr_inline_decode(xdr, 4);
4826 if (unlikely(!p))
4827 return -EIO;
4828 *res = be32_to_cpup(p);
4829 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4830 }
4831 return 0;
4832}
4833
4834static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4835{
4836 unsigned int savep;
4837 uint32_t attrlen, bitmap[3];
4838 int status;
4839
4840 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4841 goto xdr_error;
4842 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4843 goto xdr_error;
4844 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4845 goto xdr_error;
4846
4847 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4848
4849 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4850 goto xdr_error;
4851 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4852 goto xdr_error;
4853 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4854 goto xdr_error;
4855 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4856 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4857 goto xdr_error;
4858 fsinfo->wtpref = fsinfo->wtmax;
4859
4860 status = -EIO;
4861 if (unlikely(bitmap[0]))
4862 goto xdr_error;
4863
4864 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4865 if (status != 0)
4866 goto xdr_error;
4867 status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4868 if (status != 0)
4869 goto xdr_error;
4870
4871 status = -EIO;
4872 if (unlikely(bitmap[1]))
4873 goto xdr_error;
4874
4875 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4876 if (status)
4877 goto xdr_error;
4878 status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4879 if (status)
4880 goto xdr_error;
4881
4882 status = decode_attr_xattrsupport(xdr, bitmap,
4883 &fsinfo->xattr_support);
4884 if (status)
4885 goto xdr_error;
4886
4887 status = verify_attr_len(xdr, savep, attrlen);
4888xdr_error:
4889 dprintk("%s: xdr returned %d!\n", __func__, -status);
4890 return status;
4891}
4892
4893static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4894{
4895 __be32 *p;
4896 uint32_t len;
4897 int status;
4898
4899 /* Zero handle first to allow comparisons */
4900 memset(fh, 0, sizeof(*fh));
4901
4902 status = decode_op_hdr(xdr, OP_GETFH);
4903 if (status)
4904 return status;
4905
4906 p = xdr_inline_decode(xdr, 4);
4907 if (unlikely(!p))
4908 return -EIO;
4909 len = be32_to_cpup(p);
4910 if (len > NFS4_FHSIZE)
4911 return -EIO;
4912 fh->size = len;
4913 p = xdr_inline_decode(xdr, len);
4914 if (unlikely(!p))
4915 return -EIO;
4916 memcpy(fh->data, p, len);
4917 return 0;
4918}
4919
4920static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4921{
4922 int status;
4923
4924 status = decode_op_hdr(xdr, OP_LINK);
4925 if (status)
4926 return status;
4927 return decode_change_info(xdr, cinfo);
4928}
4929
4930/*
4931 * We create the owner, so we know a proper owner.id length is 4.
4932 */
4933static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4934{
4935 uint64_t offset, length, clientid;
4936 __be32 *p;
4937 uint32_t namelen, type;
4938
4939 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4940 if (unlikely(!p))
4941 return -EIO;
4942 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4943 p = xdr_decode_hyper(p, &length);
4944 type = be32_to_cpup(p++); /* 4 byte read */
4945 if (fl != NULL) { /* manipulate file lock */
4946 fl->fl_start = (loff_t)offset;
4947 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4948 if (length == ~(uint64_t)0)
4949 fl->fl_end = OFFSET_MAX;
4950 fl->fl_type = F_WRLCK;
4951 if (type & 1)
4952 fl->fl_type = F_RDLCK;
4953 fl->fl_pid = 0;
4954 }
4955 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4956 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4957 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4958 if (likely(!p))
4959 return -EIO;
4960 return -NFS4ERR_DENIED;
4961}
4962
4963static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4964{
4965 int status;
4966
4967 status = decode_op_hdr(xdr, OP_LOCK);
4968 if (status == -EIO)
4969 goto out;
4970 if (status == 0) {
4971 status = decode_lock_stateid(xdr, &res->stateid);
4972 if (unlikely(status))
4973 goto out;
4974 } else if (status == -NFS4ERR_DENIED)
4975 status = decode_lock_denied(xdr, NULL);
4976 if (res->open_seqid != NULL)
4977 nfs_increment_open_seqid(status, res->open_seqid);
4978 nfs_increment_lock_seqid(status, res->lock_seqid);
4979out:
4980 return status;
4981}
4982
4983static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4984{
4985 int status;
4986 status = decode_op_hdr(xdr, OP_LOCKT);
4987 if (status == -NFS4ERR_DENIED)
4988 return decode_lock_denied(xdr, res->denied);
4989 return status;
4990}
4991
4992static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4993{
4994 int status;
4995
4996 status = decode_op_hdr(xdr, OP_LOCKU);
4997 if (status != -EIO)
4998 nfs_increment_lock_seqid(status, res->seqid);
4999 if (status == 0)
5000 status = decode_lock_stateid(xdr, &res->stateid);
5001 return status;
5002}
5003
5004static int decode_release_lockowner(struct xdr_stream *xdr)
5005{
5006 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5007}
5008
5009static int decode_lookup(struct xdr_stream *xdr)
5010{
5011 return decode_op_hdr(xdr, OP_LOOKUP);
5012}
5013
5014static int decode_lookupp(struct xdr_stream *xdr)
5015{
5016 return decode_op_hdr(xdr, OP_LOOKUPP);
5017}
5018
5019/* This is too sick! */
5020static int decode_space_limit(struct xdr_stream *xdr,
5021 unsigned long *pagemod_limit)
5022{
5023 __be32 *p;
5024 uint32_t limit_type, nblocks, blocksize;
5025 u64 maxsize = 0;
5026
5027 p = xdr_inline_decode(xdr, 12);
5028 if (unlikely(!p))
5029 return -EIO;
5030 limit_type = be32_to_cpup(p++);
5031 switch (limit_type) {
5032 case NFS4_LIMIT_SIZE:
5033 xdr_decode_hyper(p, &maxsize);
5034 break;
5035 case NFS4_LIMIT_BLOCKS:
5036 nblocks = be32_to_cpup(p++);
5037 blocksize = be32_to_cpup(p);
5038 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5039 }
5040 maxsize >>= PAGE_SHIFT;
5041 *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5042 return 0;
5043}
5044
5045static int decode_rw_delegation(struct xdr_stream *xdr,
5046 uint32_t delegation_type,
5047 struct nfs_openres *res)
5048{
5049 __be32 *p;
5050 int status;
5051
5052 status = decode_delegation_stateid(xdr, &res->delegation);
5053 if (unlikely(status))
5054 return status;
5055 p = xdr_inline_decode(xdr, 4);
5056 if (unlikely(!p))
5057 return -EIO;
5058 res->do_recall = be32_to_cpup(p);
5059
5060 switch (delegation_type) {
5061 case NFS4_OPEN_DELEGATE_READ:
5062 res->delegation_type = FMODE_READ;
5063 break;
5064 case NFS4_OPEN_DELEGATE_WRITE:
5065 res->delegation_type = FMODE_WRITE|FMODE_READ;
5066 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5067 return -EIO;
5068 }
5069 return decode_ace(xdr, NULL);
5070}
5071
5072static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5073{
5074 __be32 *p;
5075 uint32_t why_no_delegation;
5076
5077 p = xdr_inline_decode(xdr, 4);
5078 if (unlikely(!p))
5079 return -EIO;
5080 why_no_delegation = be32_to_cpup(p);
5081 switch (why_no_delegation) {
5082 case WND4_CONTENTION:
5083 case WND4_RESOURCE:
5084 xdr_inline_decode(xdr, 4);
5085 /* Ignore for now */
5086 }
5087 return 0;
5088}
5089
5090static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5091{
5092 __be32 *p;
5093 uint32_t delegation_type;
5094
5095 p = xdr_inline_decode(xdr, 4);
5096 if (unlikely(!p))
5097 return -EIO;
5098 delegation_type = be32_to_cpup(p);
5099 res->delegation_type = 0;
5100 switch (delegation_type) {
5101 case NFS4_OPEN_DELEGATE_NONE:
5102 return 0;
5103 case NFS4_OPEN_DELEGATE_READ:
5104 case NFS4_OPEN_DELEGATE_WRITE:
5105 return decode_rw_delegation(xdr, delegation_type, res);
5106 case NFS4_OPEN_DELEGATE_NONE_EXT:
5107 return decode_no_delegation(xdr, res);
5108 }
5109 return -EIO;
5110}
5111
5112static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5113{
5114 __be32 *p;
5115 uint32_t savewords, bmlen, i;
5116 int status;
5117
5118 if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5119 return status;
5120 nfs_increment_open_seqid(status, res->seqid);
5121 if (status)
5122 return status;
5123 status = decode_open_stateid(xdr, &res->stateid);
5124 if (unlikely(status))
5125 return status;
5126
5127 decode_change_info(xdr, &res->cinfo);
5128
5129 p = xdr_inline_decode(xdr, 8);
5130 if (unlikely(!p))
5131 return -EIO;
5132 res->rflags = be32_to_cpup(p++);
5133 bmlen = be32_to_cpup(p);
5134 if (bmlen > 10)
5135 goto xdr_error;
5136
5137 p = xdr_inline_decode(xdr, bmlen << 2);
5138 if (unlikely(!p))
5139 return -EIO;
5140 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5141 for (i = 0; i < savewords; ++i)
5142 res->attrset[i] = be32_to_cpup(p++);
5143 for (; i < NFS4_BITMAP_SIZE; i++)
5144 res->attrset[i] = 0;
5145
5146 return decode_delegation(xdr, res);
5147xdr_error:
5148 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5149 return -EIO;
5150}
5151
5152static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5153{
5154 int status;
5155
5156 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5157 if (status != -EIO)
5158 nfs_increment_open_seqid(status, res->seqid);
5159 if (!status)
5160 status = decode_open_stateid(xdr, &res->stateid);
5161 return status;
5162}
5163
5164static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5165{
5166 int status;
5167
5168 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5169 if (status != -EIO)
5170 nfs_increment_open_seqid(status, res->seqid);
5171 if (!status)
5172 status = decode_open_stateid(xdr, &res->stateid);
5173 return status;
5174}
5175
5176static int decode_putfh(struct xdr_stream *xdr)
5177{
5178 return decode_op_hdr(xdr, OP_PUTFH);
5179}
5180
5181static int decode_putrootfh(struct xdr_stream *xdr)
5182{
5183 return decode_op_hdr(xdr, OP_PUTROOTFH);
5184}
5185
5186static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5187 struct nfs_pgio_res *res)
5188{
5189 __be32 *p;
5190 uint32_t count, eof, recvd;
5191 int status;
5192
5193 status = decode_op_hdr(xdr, OP_READ);
5194 if (status)
5195 return status;
5196 p = xdr_inline_decode(xdr, 8);
5197 if (unlikely(!p))
5198 return -EIO;
5199 eof = be32_to_cpup(p++);
5200 count = be32_to_cpup(p);
5201 recvd = xdr_read_pages(xdr, count);
5202 if (count > recvd) {
5203 dprintk("NFS: server cheating in read reply: "
5204 "count %u > recvd %u\n", count, recvd);
5205 count = recvd;
5206 eof = 0;
5207 }
5208 res->eof = eof;
5209 res->count = count;
5210 return 0;
5211}
5212
5213static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5214{
5215 int status;
5216 __be32 verf[2];
5217
5218 status = decode_op_hdr(xdr, OP_READDIR);
5219 if (!status)
5220 status = decode_verifier(xdr, readdir->verifier.data);
5221 if (unlikely(status))
5222 return status;
5223 memcpy(verf, readdir->verifier.data, sizeof(verf));
5224 dprintk("%s: verifier = %08x:%08x\n",
5225 __func__, verf[0], verf[1]);
5226 return xdr_read_pages(xdr, xdr->buf->page_len);
5227}
5228
5229static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5230{
5231 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5232 u32 len, recvd;
5233 __be32 *p;
5234 int status;
5235
5236 status = decode_op_hdr(xdr, OP_READLINK);
5237 if (status)
5238 return status;
5239
5240 /* Convert length of symlink */
5241 p = xdr_inline_decode(xdr, 4);
5242 if (unlikely(!p))
5243 return -EIO;
5244 len = be32_to_cpup(p);
5245 if (len >= rcvbuf->page_len || len <= 0) {
5246 dprintk("nfs: server returned giant symlink!\n");
5247 return -ENAMETOOLONG;
5248 }
5249 recvd = xdr_read_pages(xdr, len);
5250 if (recvd < len) {
5251 dprintk("NFS: server cheating in readlink reply: "
5252 "count %u > recvd %u\n", len, recvd);
5253 return -EIO;
5254 }
5255 /*
5256 * The XDR encode routine has set things up so that
5257 * the link text will be copied directly into the
5258 * buffer. We just have to do overflow-checking,
5259 * and null-terminate the text (the VFS expects
5260 * null-termination).
5261 */
5262 xdr_terminate_string(rcvbuf, len);
5263 return 0;
5264}
5265
5266static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5267{
5268 int status;
5269
5270 status = decode_op_hdr(xdr, OP_REMOVE);
5271 if (status)
5272 goto out;
5273 status = decode_change_info(xdr, cinfo);
5274out:
5275 return status;
5276}
5277
5278static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5279 struct nfs4_change_info *new_cinfo)
5280{
5281 int status;
5282
5283 status = decode_op_hdr(xdr, OP_RENAME);
5284 if (status)
5285 goto out;
5286 if ((status = decode_change_info(xdr, old_cinfo)))
5287 goto out;
5288 status = decode_change_info(xdr, new_cinfo);
5289out:
5290 return status;
5291}
5292
5293static int decode_renew(struct xdr_stream *xdr)
5294{
5295 return decode_op_hdr(xdr, OP_RENEW);
5296}
5297
5298static int
5299decode_restorefh(struct xdr_stream *xdr)
5300{
5301 return decode_op_hdr(xdr, OP_RESTOREFH);
5302}
5303
5304static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5305 struct nfs_getaclres *res)
5306{
5307 unsigned int savep;
5308 uint32_t attrlen,
5309 bitmap[3] = {0};
5310 int status;
5311 unsigned int pg_offset;
5312
5313 res->acl_len = 0;
5314 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5315 goto out;
5316
5317 xdr_enter_page(xdr, xdr->buf->page_len);
5318
5319 /* Calculate the offset of the page data */
5320 pg_offset = xdr->buf->head[0].iov_len;
5321
5322 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5323 goto out;
5324 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5325 goto out;
5326
5327 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5328 return -EIO;
5329 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5330
5331 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5332 * are stored with the acl data to handle the problem of
5333 * variable length bitmaps.*/
5334 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5335 res->acl_len = attrlen;
5336
5337 /* Check for receive buffer overflow */
5338 if (res->acl_len > (xdr->nwords << 2) ||
5339 res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5340 res->acl_flags |= NFS4_ACL_TRUNC;
5341 dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5342 attrlen, xdr->nwords << 2);
5343 }
5344 } else
5345 status = -EOPNOTSUPP;
5346
5347out:
5348 return status;
5349}
5350
5351static int
5352decode_savefh(struct xdr_stream *xdr)
5353{
5354 return decode_op_hdr(xdr, OP_SAVEFH);
5355}
5356
5357static int decode_setattr(struct xdr_stream *xdr)
5358{
5359 int status;
5360
5361 status = decode_op_hdr(xdr, OP_SETATTR);
5362 if (status)
5363 return status;
5364 if (decode_bitmap4(xdr, NULL, 0) >= 0)
5365 return 0;
5366 return -EIO;
5367}
5368
5369static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5370{
5371 __be32 *p;
5372 uint32_t opnum;
5373 int32_t nfserr;
5374
5375 p = xdr_inline_decode(xdr, 8);
5376 if (unlikely(!p))
5377 return -EIO;
5378 opnum = be32_to_cpup(p++);
5379 if (opnum != OP_SETCLIENTID) {
5380 dprintk("nfs: decode_setclientid: Server returned operation"
5381 " %d\n", opnum);
5382 return -EIO;
5383 }
5384 nfserr = be32_to_cpup(p);
5385 if (nfserr == NFS_OK) {
5386 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5387 if (unlikely(!p))
5388 return -EIO;
5389 p = xdr_decode_hyper(p, &res->clientid);
5390 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5391 } else if (nfserr == NFSERR_CLID_INUSE) {
5392 uint32_t len;
5393
5394 /* skip netid string */
5395 p = xdr_inline_decode(xdr, 4);
5396 if (unlikely(!p))
5397 return -EIO;
5398 len = be32_to_cpup(p);
5399 p = xdr_inline_decode(xdr, len);
5400 if (unlikely(!p))
5401 return -EIO;
5402
5403 /* skip uaddr string */
5404 p = xdr_inline_decode(xdr, 4);
5405 if (unlikely(!p))
5406 return -EIO;
5407 len = be32_to_cpup(p);
5408 p = xdr_inline_decode(xdr, len);
5409 if (unlikely(!p))
5410 return -EIO;
5411 return -NFSERR_CLID_INUSE;
5412 } else
5413 return nfs4_stat_to_errno(nfserr);
5414
5415 return 0;
5416}
5417
5418static int decode_setclientid_confirm(struct xdr_stream *xdr)
5419{
5420 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5421}
5422
5423static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5424{
5425 __be32 *p;
5426 int status;
5427
5428 status = decode_op_hdr(xdr, OP_WRITE);
5429 if (status)
5430 return status;
5431
5432 p = xdr_inline_decode(xdr, 8);
5433 if (unlikely(!p))
5434 return -EIO;
5435 res->count = be32_to_cpup(p++);
5436 res->verf->committed = be32_to_cpup(p++);
5437 return decode_write_verifier(xdr, &res->verf->verifier);
5438}
5439
5440static int decode_delegreturn(struct xdr_stream *xdr)
5441{
5442 return decode_op_hdr(xdr, OP_DELEGRETURN);
5443}
5444
5445static int decode_secinfo_gss(struct xdr_stream *xdr,
5446 struct nfs4_secinfo4 *flavor)
5447{
5448 u32 oid_len;
5449 __be32 *p;
5450
5451 p = xdr_inline_decode(xdr, 4);
5452 if (unlikely(!p))
5453 return -EIO;
5454 oid_len = be32_to_cpup(p);
5455 if (oid_len > GSS_OID_MAX_LEN)
5456 return -EINVAL;
5457
5458 p = xdr_inline_decode(xdr, oid_len);
5459 if (unlikely(!p))
5460 return -EIO;
5461 memcpy(flavor->flavor_info.oid.data, p, oid_len);
5462 flavor->flavor_info.oid.len = oid_len;
5463
5464 p = xdr_inline_decode(xdr, 8);
5465 if (unlikely(!p))
5466 return -EIO;
5467 flavor->flavor_info.qop = be32_to_cpup(p++);
5468 flavor->flavor_info.service = be32_to_cpup(p);
5469
5470 return 0;
5471}
5472
5473static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5474{
5475 struct nfs4_secinfo4 *sec_flavor;
5476 unsigned int i, num_flavors;
5477 int status;
5478 __be32 *p;
5479
5480 p = xdr_inline_decode(xdr, 4);
5481 if (unlikely(!p))
5482 return -EIO;
5483
5484 res->flavors->num_flavors = 0;
5485 num_flavors = be32_to_cpup(p);
5486
5487 for (i = 0; i < num_flavors; i++) {
5488 sec_flavor = &res->flavors->flavors[i];
5489 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5490 break;
5491
5492 p = xdr_inline_decode(xdr, 4);
5493 if (unlikely(!p))
5494 return -EIO;
5495 sec_flavor->flavor = be32_to_cpup(p);
5496
5497 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5498 status = decode_secinfo_gss(xdr, sec_flavor);
5499 if (status)
5500 goto out;
5501 }
5502 res->flavors->num_flavors++;
5503 }
5504
5505 status = 0;
5506out:
5507 return status;
5508}
5509
5510static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5511{
5512 int status = decode_op_hdr(xdr, OP_SECINFO);
5513 if (status)
5514 return status;
5515 return decode_secinfo_common(xdr, res);
5516}
5517
5518#if defined(CONFIG_NFS_V4_1)
5519static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5520{
5521 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5522 if (status)
5523 return status;
5524 return decode_secinfo_common(xdr, res);
5525}
5526
5527static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5528{
5529 __be32 *p;
5530 uint32_t bitmap_words;
5531 unsigned int i;
5532
5533 p = xdr_inline_decode(xdr, 4);
5534 if (!p)
5535 return -EIO;
5536 bitmap_words = be32_to_cpup(p++);
5537 if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5538 return -EIO;
5539 p = xdr_inline_decode(xdr, 4 * bitmap_words);
5540 for (i = 0; i < bitmap_words; i++)
5541 op_map->u.words[i] = be32_to_cpup(p++);
5542
5543 return 0;
5544}
5545
5546static int decode_exchange_id(struct xdr_stream *xdr,
5547 struct nfs41_exchange_id_res *res)
5548{
5549 __be32 *p;
5550 uint32_t dummy;
5551 char *dummy_str;
5552 int status;
5553 uint32_t impl_id_count;
5554
5555 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5556 if (status)
5557 return status;
5558
5559 p = xdr_inline_decode(xdr, 8);
5560 if (unlikely(!p))
5561 return -EIO;
5562 xdr_decode_hyper(p, &res->clientid);
5563 p = xdr_inline_decode(xdr, 12);
5564 if (unlikely(!p))
5565 return -EIO;
5566 res->seqid = be32_to_cpup(p++);
5567 res->flags = be32_to_cpup(p++);
5568
5569 res->state_protect.how = be32_to_cpup(p);
5570 switch (res->state_protect.how) {
5571 case SP4_NONE:
5572 break;
5573 case SP4_MACH_CRED:
5574 status = decode_op_map(xdr, &res->state_protect.enforce);
5575 if (status)
5576 return status;
5577 status = decode_op_map(xdr, &res->state_protect.allow);
5578 if (status)
5579 return status;
5580 break;
5581 default:
5582 WARN_ON_ONCE(1);
5583 return -EIO;
5584 }
5585
5586 /* server_owner4.so_minor_id */
5587 p = xdr_inline_decode(xdr, 8);
5588 if (unlikely(!p))
5589 return -EIO;
5590 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5591
5592 /* server_owner4.so_major_id */
5593 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5594 if (unlikely(status))
5595 return status;
5596 memcpy(res->server_owner->major_id, dummy_str, dummy);
5597 res->server_owner->major_id_sz = dummy;
5598
5599 /* server_scope4 */
5600 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5601 if (unlikely(status))
5602 return status;
5603 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5604 res->server_scope->server_scope_sz = dummy;
5605
5606 /* Implementation Id */
5607 p = xdr_inline_decode(xdr, 4);
5608 if (unlikely(!p))
5609 return -EIO;
5610 impl_id_count = be32_to_cpup(p++);
5611
5612 if (impl_id_count) {
5613 /* nii_domain */
5614 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5615 if (unlikely(status))
5616 return status;
5617 memcpy(res->impl_id->domain, dummy_str, dummy);
5618
5619 /* nii_name */
5620 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5621 if (unlikely(status))
5622 return status;
5623 memcpy(res->impl_id->name, dummy_str, dummy);
5624
5625 /* nii_date */
5626 p = xdr_inline_decode(xdr, 12);
5627 if (unlikely(!p))
5628 return -EIO;
5629 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5630 res->impl_id->date.nseconds = be32_to_cpup(p);
5631
5632 /* if there's more than one entry, ignore the rest */
5633 }
5634 return 0;
5635}
5636
5637static int decode_chan_attrs(struct xdr_stream *xdr,
5638 struct nfs4_channel_attrs *attrs)
5639{
5640 __be32 *p;
5641 u32 nr_attrs, val;
5642
5643 p = xdr_inline_decode(xdr, 28);
5644 if (unlikely(!p))
5645 return -EIO;
5646 val = be32_to_cpup(p++); /* headerpadsz */
5647 if (val)
5648 return -EINVAL; /* no support for header padding yet */
5649 attrs->max_rqst_sz = be32_to_cpup(p++);
5650 attrs->max_resp_sz = be32_to_cpup(p++);
5651 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5652 attrs->max_ops = be32_to_cpup(p++);
5653 attrs->max_reqs = be32_to_cpup(p++);
5654 nr_attrs = be32_to_cpup(p);
5655 if (unlikely(nr_attrs > 1)) {
5656 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5657 "count %u\n", __func__, nr_attrs);
5658 return -EINVAL;
5659 }
5660 if (nr_attrs == 1) {
5661 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5662 if (unlikely(!p))
5663 return -EIO;
5664 }
5665 return 0;
5666}
5667
5668static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5669{
5670 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5671}
5672
5673static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5674 struct nfs41_bind_conn_to_session_res *res)
5675{
5676 __be32 *p;
5677 int status;
5678
5679 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5680 if (!status)
5681 status = decode_sessionid(xdr, &res->sessionid);
5682 if (unlikely(status))
5683 return status;
5684
5685 /* dir flags, rdma mode bool */
5686 p = xdr_inline_decode(xdr, 8);
5687 if (unlikely(!p))
5688 return -EIO;
5689
5690 res->dir = be32_to_cpup(p++);
5691 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5692 return -EIO;
5693 if (be32_to_cpup(p) == 0)
5694 res->use_conn_in_rdma_mode = false;
5695 else
5696 res->use_conn_in_rdma_mode = true;
5697
5698 return 0;
5699}
5700
5701static int decode_create_session(struct xdr_stream *xdr,
5702 struct nfs41_create_session_res *res)
5703{
5704 __be32 *p;
5705 int status;
5706
5707 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5708 if (!status)
5709 status = decode_sessionid(xdr, &res->sessionid);
5710 if (unlikely(status))
5711 return status;
5712
5713 /* seqid, flags */
5714 p = xdr_inline_decode(xdr, 8);
5715 if (unlikely(!p))
5716 return -EIO;
5717 res->seqid = be32_to_cpup(p++);
5718 res->flags = be32_to_cpup(p);
5719
5720 /* Channel attributes */
5721 status = decode_chan_attrs(xdr, &res->fc_attrs);
5722 if (!status)
5723 status = decode_chan_attrs(xdr, &res->bc_attrs);
5724 return status;
5725}
5726
5727static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5728{
5729 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5730}
5731
5732static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5733{
5734 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5735}
5736
5737static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5738{
5739 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5740}
5741#endif /* CONFIG_NFS_V4_1 */
5742
5743static int decode_sequence(struct xdr_stream *xdr,
5744 struct nfs4_sequence_res *res,
5745 struct rpc_rqst *rqstp)
5746{
5747#if defined(CONFIG_NFS_V4_1)
5748 struct nfs4_session *session;
5749 struct nfs4_sessionid id;
5750 u32 dummy;
5751 int status;
5752 __be32 *p;
5753
5754 if (res->sr_slot == NULL)
5755 return 0;
5756 if (!res->sr_slot->table->session)
5757 return 0;
5758
5759 status = decode_op_hdr(xdr, OP_SEQUENCE);
5760 if (!status)
5761 status = decode_sessionid(xdr, &id);
5762 if (unlikely(status))
5763 goto out_err;
5764
5765 /*
5766 * If the server returns different values for sessionID, slotID or
5767 * sequence number, the server is looney tunes.
5768 */
5769 status = -EREMOTEIO;
5770 session = res->sr_slot->table->session;
5771
5772 if (memcmp(id.data, session->sess_id.data,
5773 NFS4_MAX_SESSIONID_LEN)) {
5774 dprintk("%s Invalid session id\n", __func__);
5775 goto out_err;
5776 }
5777
5778 p = xdr_inline_decode(xdr, 20);
5779 if (unlikely(!p))
5780 goto out_overflow;
5781
5782 /* seqid */
5783 dummy = be32_to_cpup(p++);
5784 if (dummy != res->sr_slot->seq_nr) {
5785 dprintk("%s Invalid sequence number\n", __func__);
5786 goto out_err;
5787 }
5788 /* slot id */
5789 dummy = be32_to_cpup(p++);
5790 if (dummy != res->sr_slot->slot_nr) {
5791 dprintk("%s Invalid slot id\n", __func__);
5792 goto out_err;
5793 }
5794 /* highest slot id */
5795 res->sr_highest_slotid = be32_to_cpup(p++);
5796 /* target highest slot id */
5797 res->sr_target_highest_slotid = be32_to_cpup(p++);
5798 /* result flags */
5799 res->sr_status_flags = be32_to_cpup(p);
5800 status = 0;
5801out_err:
5802 res->sr_status = status;
5803 return status;
5804out_overflow:
5805 status = -EIO;
5806 goto out_err;
5807#else /* CONFIG_NFS_V4_1 */
5808 return 0;
5809#endif /* CONFIG_NFS_V4_1 */
5810}
5811
5812#if defined(CONFIG_NFS_V4_1)
5813static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5814{
5815 stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5816 return decode_stateid(xdr, stateid);
5817}
5818
5819static int decode_getdeviceinfo(struct xdr_stream *xdr,
5820 struct nfs4_getdeviceinfo_res *res)
5821{
5822 struct pnfs_device *pdev = res->pdev;
5823 __be32 *p;
5824 uint32_t len, type;
5825 int status;
5826
5827 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5828 if (status) {
5829 if (status == -ETOOSMALL) {
5830 p = xdr_inline_decode(xdr, 4);
5831 if (unlikely(!p))
5832 return -EIO;
5833 pdev->mincount = be32_to_cpup(p);
5834 dprintk("%s: Min count too small. mincnt = %u\n",
5835 __func__, pdev->mincount);
5836 }
5837 return status;
5838 }
5839
5840 p = xdr_inline_decode(xdr, 8);
5841 if (unlikely(!p))
5842 return -EIO;
5843 type = be32_to_cpup(p++);
5844 if (type != pdev->layout_type) {
5845 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5846 __func__, pdev->layout_type, type);
5847 return -EINVAL;
5848 }
5849 /*
5850 * Get the length of the opaque device_addr4. xdr_read_pages places
5851 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5852 * and places the remaining xdr data in xdr_buf->tail
5853 */
5854 pdev->mincount = be32_to_cpup(p);
5855 if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5856 return -EIO;
5857
5858 /* Parse notification bitmap, verifying that it is zero. */
5859 p = xdr_inline_decode(xdr, 4);
5860 if (unlikely(!p))
5861 return -EIO;
5862 len = be32_to_cpup(p);
5863 if (len) {
5864 uint32_t i;
5865
5866 p = xdr_inline_decode(xdr, 4 * len);
5867 if (unlikely(!p))
5868 return -EIO;
5869
5870 res->notification = be32_to_cpup(p++);
5871 for (i = 1; i < len; i++) {
5872 if (be32_to_cpup(p++)) {
5873 dprintk("%s: unsupported notification\n",
5874 __func__);
5875 return -EIO;
5876 }
5877 }
5878 }
5879 return 0;
5880}
5881
5882static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5883 struct nfs4_layoutget_res *res)
5884{
5885 __be32 *p;
5886 int status;
5887 u32 layout_count;
5888 u32 recvd;
5889
5890 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5891 if (status)
5892 goto out;
5893 p = xdr_inline_decode(xdr, 4);
5894 if (unlikely(!p))
5895 goto out_overflow;
5896 res->return_on_close = be32_to_cpup(p);
5897 decode_layout_stateid(xdr, &res->stateid);
5898 p = xdr_inline_decode(xdr, 4);
5899 if (unlikely(!p))
5900 goto out_overflow;
5901 layout_count = be32_to_cpup(p);
5902 if (!layout_count) {
5903 dprintk("%s: server responded with empty layout array\n",
5904 __func__);
5905 status = -EINVAL;
5906 goto out;
5907 }
5908
5909 p = xdr_inline_decode(xdr, 28);
5910 if (unlikely(!p))
5911 goto out_overflow;
5912 p = xdr_decode_hyper(p, &res->range.offset);
5913 p = xdr_decode_hyper(p, &res->range.length);
5914 res->range.iomode = be32_to_cpup(p++);
5915 res->type = be32_to_cpup(p++);
5916 res->layoutp->len = be32_to_cpup(p);
5917
5918 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5919 __func__,
5920 (unsigned long)res->range.offset,
5921 (unsigned long)res->range.length,
5922 res->range.iomode,
5923 res->type,
5924 res->layoutp->len);
5925
5926 recvd = xdr_read_pages(xdr, res->layoutp->len);
5927 if (res->layoutp->len > recvd) {
5928 dprintk("NFS: server cheating in layoutget reply: "
5929 "layout len %u > recvd %u\n",
5930 res->layoutp->len, recvd);
5931 status = -EINVAL;
5932 goto out;
5933 }
5934
5935 if (layout_count > 1) {
5936 /* We only handle a length one array at the moment. Any
5937 * further entries are just ignored. Note that this means
5938 * the client may see a response that is less than the
5939 * minimum it requested.
5940 */
5941 dprintk("%s: server responded with %d layouts, dropping tail\n",
5942 __func__, layout_count);
5943 }
5944
5945out:
5946 res->status = status;
5947 return status;
5948out_overflow:
5949 status = -EIO;
5950 goto out;
5951}
5952
5953static int decode_layoutreturn(struct xdr_stream *xdr,
5954 struct nfs4_layoutreturn_res *res)
5955{
5956 __be32 *p;
5957 int status;
5958
5959 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5960 if (status)
5961 return status;
5962 p = xdr_inline_decode(xdr, 4);
5963 if (unlikely(!p))
5964 return -EIO;
5965 res->lrs_present = be32_to_cpup(p);
5966 if (res->lrs_present)
5967 status = decode_layout_stateid(xdr, &res->stateid);
5968 else
5969 nfs4_stateid_copy(&res->stateid, &invalid_stateid);
5970 return status;
5971}
5972
5973static int decode_layoutcommit(struct xdr_stream *xdr,
5974 struct rpc_rqst *req,
5975 struct nfs4_layoutcommit_res *res)
5976{
5977 __be32 *p;
5978 __u32 sizechanged;
5979 int status;
5980
5981 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5982 res->status = status;
5983 if (status)
5984 return status;
5985
5986 p = xdr_inline_decode(xdr, 4);
5987 if (unlikely(!p))
5988 return -EIO;
5989 sizechanged = be32_to_cpup(p);
5990
5991 if (sizechanged) {
5992 /* throw away new size */
5993 p = xdr_inline_decode(xdr, 8);
5994 if (unlikely(!p))
5995 return -EIO;
5996 }
5997 return 0;
5998}
5999
6000static int decode_test_stateid(struct xdr_stream *xdr,
6001 struct nfs41_test_stateid_res *res)
6002{
6003 __be32 *p;
6004 int status;
6005 int num_res;
6006
6007 status = decode_op_hdr(xdr, OP_TEST_STATEID);
6008 if (status)
6009 return status;
6010
6011 p = xdr_inline_decode(xdr, 4);
6012 if (unlikely(!p))
6013 return -EIO;
6014 num_res = be32_to_cpup(p++);
6015 if (num_res != 1)
6016 return -EIO;
6017
6018 p = xdr_inline_decode(xdr, 4);
6019 if (unlikely(!p))
6020 return -EIO;
6021 res->status = be32_to_cpup(p++);
6022
6023 return status;
6024}
6025
6026static int decode_free_stateid(struct xdr_stream *xdr,
6027 struct nfs41_free_stateid_res *res)
6028{
6029 res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6030 return res->status;
6031}
6032#else
6033static inline
6034int decode_layoutreturn(struct xdr_stream *xdr,
6035 struct nfs4_layoutreturn_res *res)
6036{
6037 return 0;
6038}
6039
6040static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6041 struct nfs4_layoutget_res *res)
6042{
6043 return 0;
6044}
6045
6046#endif /* CONFIG_NFS_V4_1 */
6047
6048/*
6049 * END OF "GENERIC" DECODE ROUTINES.
6050 */
6051
6052/*
6053 * Decode OPEN_DOWNGRADE response
6054 */
6055static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6056 struct xdr_stream *xdr,
6057 void *data)
6058{
6059 struct nfs_closeres *res = data;
6060 struct compound_hdr hdr;
6061 int status;
6062
6063 status = decode_compound_hdr(xdr, &hdr);
6064 if (status)
6065 goto out;
6066 status = decode_sequence(xdr, &res->seq_res, rqstp);
6067 if (status)
6068 goto out;
6069 status = decode_putfh(xdr);
6070 if (status)
6071 goto out;
6072 if (res->lr_res) {
6073 status = decode_layoutreturn(xdr, res->lr_res);
6074 res->lr_ret = status;
6075 if (status)
6076 goto out;
6077 }
6078 status = decode_open_downgrade(xdr, res);
6079out:
6080 return status;
6081}
6082
6083/*
6084 * Decode ACCESS response
6085 */
6086static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6087 void *data)
6088{
6089 struct nfs4_accessres *res = data;
6090 struct compound_hdr hdr;
6091 int status;
6092
6093 status = decode_compound_hdr(xdr, &hdr);
6094 if (status)
6095 goto out;
6096 status = decode_sequence(xdr, &res->seq_res, rqstp);
6097 if (status)
6098 goto out;
6099 status = decode_putfh(xdr);
6100 if (status != 0)
6101 goto out;
6102 status = decode_access(xdr, &res->supported, &res->access);
6103 if (status != 0)
6104 goto out;
6105 if (res->fattr)
6106 decode_getfattr(xdr, res->fattr, res->server);
6107out:
6108 return status;
6109}
6110
6111/*
6112 * Decode LOOKUP response
6113 */
6114static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6115 void *data)
6116{
6117 struct nfs4_lookup_res *res = data;
6118 struct compound_hdr hdr;
6119 int status;
6120
6121 status = decode_compound_hdr(xdr, &hdr);
6122 if (status)
6123 goto out;
6124 status = decode_sequence(xdr, &res->seq_res, rqstp);
6125 if (status)
6126 goto out;
6127 status = decode_putfh(xdr);
6128 if (status)
6129 goto out;
6130 status = decode_lookup(xdr);
6131 if (status)
6132 goto out;
6133 status = decode_getfh(xdr, res->fh);
6134 if (status)
6135 goto out;
6136 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6137out:
6138 return status;
6139}
6140
6141/*
6142 * Decode LOOKUPP response
6143 */
6144static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6145 void *data)
6146{
6147 struct nfs4_lookupp_res *res = data;
6148 struct compound_hdr hdr;
6149 int status;
6150
6151 status = decode_compound_hdr(xdr, &hdr);
6152 if (status)
6153 goto out;
6154 status = decode_sequence(xdr, &res->seq_res, rqstp);
6155 if (status)
6156 goto out;
6157 status = decode_putfh(xdr);
6158 if (status)
6159 goto out;
6160 status = decode_lookupp(xdr);
6161 if (status)
6162 goto out;
6163 status = decode_getfh(xdr, res->fh);
6164 if (status)
6165 goto out;
6166 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6167out:
6168 return status;
6169}
6170
6171/*
6172 * Decode LOOKUP_ROOT response
6173 */
6174static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6175 struct xdr_stream *xdr,
6176 void *data)
6177{
6178 struct nfs4_lookup_res *res = data;
6179 struct compound_hdr hdr;
6180 int status;
6181
6182 status = decode_compound_hdr(xdr, &hdr);
6183 if (status)
6184 goto out;
6185 status = decode_sequence(xdr, &res->seq_res, rqstp);
6186 if (status)
6187 goto out;
6188 status = decode_putrootfh(xdr);
6189 if (status)
6190 goto out;
6191 status = decode_getfh(xdr, res->fh);
6192 if (status == 0)
6193 status = decode_getfattr_label(xdr, res->fattr,
6194 res->label, res->server);
6195out:
6196 return status;
6197}
6198
6199/*
6200 * Decode REMOVE response
6201 */
6202static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6203 void *data)
6204{
6205 struct nfs_removeres *res = data;
6206 struct compound_hdr hdr;
6207 int status;
6208
6209 status = decode_compound_hdr(xdr, &hdr);
6210 if (status)
6211 goto out;
6212 status = decode_sequence(xdr, &res->seq_res, rqstp);
6213 if (status)
6214 goto out;
6215 status = decode_putfh(xdr);
6216 if (status)
6217 goto out;
6218 status = decode_remove(xdr, &res->cinfo);
6219out:
6220 return status;
6221}
6222
6223/*
6224 * Decode RENAME response
6225 */
6226static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6227 void *data)
6228{
6229 struct nfs_renameres *res = data;
6230 struct compound_hdr hdr;
6231 int status;
6232
6233 status = decode_compound_hdr(xdr, &hdr);
6234 if (status)
6235 goto out;
6236 status = decode_sequence(xdr, &res->seq_res, rqstp);
6237 if (status)
6238 goto out;
6239 status = decode_putfh(xdr);
6240 if (status)
6241 goto out;
6242 status = decode_savefh(xdr);
6243 if (status)
6244 goto out;
6245 status = decode_putfh(xdr);
6246 if (status)
6247 goto out;
6248 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6249out:
6250 return status;
6251}
6252
6253/*
6254 * Decode LINK response
6255 */
6256static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6257 void *data)
6258{
6259 struct nfs4_link_res *res = data;
6260 struct compound_hdr hdr;
6261 int status;
6262
6263 status = decode_compound_hdr(xdr, &hdr);
6264 if (status)
6265 goto out;
6266 status = decode_sequence(xdr, &res->seq_res, rqstp);
6267 if (status)
6268 goto out;
6269 status = decode_putfh(xdr);
6270 if (status)
6271 goto out;
6272 status = decode_savefh(xdr);
6273 if (status)
6274 goto out;
6275 status = decode_putfh(xdr);
6276 if (status)
6277 goto out;
6278 status = decode_link(xdr, &res->cinfo);
6279 if (status)
6280 goto out;
6281 /*
6282 * Note order: OP_LINK leaves the directory as the current
6283 * filehandle.
6284 */
6285 status = decode_restorefh(xdr);
6286 if (status)
6287 goto out;
6288 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6289out:
6290 return status;
6291}
6292
6293/*
6294 * Decode CREATE response
6295 */
6296static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6297 void *data)
6298{
6299 struct nfs4_create_res *res = data;
6300 struct compound_hdr hdr;
6301 int status;
6302
6303 status = decode_compound_hdr(xdr, &hdr);
6304 if (status)
6305 goto out;
6306 status = decode_sequence(xdr, &res->seq_res, rqstp);
6307 if (status)
6308 goto out;
6309 status = decode_putfh(xdr);
6310 if (status)
6311 goto out;
6312 status = decode_create(xdr, &res->dir_cinfo);
6313 if (status)
6314 goto out;
6315 status = decode_getfh(xdr, res->fh);
6316 if (status)
6317 goto out;
6318 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6319out:
6320 return status;
6321}
6322
6323/*
6324 * Decode SYMLINK response
6325 */
6326static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6327 void *res)
6328{
6329 return nfs4_xdr_dec_create(rqstp, xdr, res);
6330}
6331
6332/*
6333 * Decode GETATTR response
6334 */
6335static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6336 void *data)
6337{
6338 struct nfs4_getattr_res *res = data;
6339 struct compound_hdr hdr;
6340 int status;
6341
6342 status = decode_compound_hdr(xdr, &hdr);
6343 if (status)
6344 goto out;
6345 status = decode_sequence(xdr, &res->seq_res, rqstp);
6346 if (status)
6347 goto out;
6348 status = decode_putfh(xdr);
6349 if (status)
6350 goto out;
6351 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6352out:
6353 return status;
6354}
6355
6356/*
6357 * Encode an SETACL request
6358 */
6359static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6360 const void *data)
6361{
6362 const struct nfs_setaclargs *args = data;
6363 struct compound_hdr hdr = {
6364 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6365 };
6366
6367 encode_compound_hdr(xdr, req, &hdr);
6368 encode_sequence(xdr, &args->seq_args, &hdr);
6369 encode_putfh(xdr, args->fh, &hdr);
6370 encode_setacl(xdr, args, &hdr);
6371 encode_nops(&hdr);
6372}
6373
6374/*
6375 * Decode SETACL response
6376 */
6377static int
6378nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6379 void *data)
6380{
6381 struct nfs_setaclres *res = data;
6382 struct compound_hdr hdr;
6383 int status;
6384
6385 status = decode_compound_hdr(xdr, &hdr);
6386 if (status)
6387 goto out;
6388 status = decode_sequence(xdr, &res->seq_res, rqstp);
6389 if (status)
6390 goto out;
6391 status = decode_putfh(xdr);
6392 if (status)
6393 goto out;
6394 status = decode_setattr(xdr);
6395out:
6396 return status;
6397}
6398
6399/*
6400 * Decode GETACL response
6401 */
6402static int
6403nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6404 void *data)
6405{
6406 struct nfs_getaclres *res = data;
6407 struct compound_hdr hdr;
6408 int status;
6409
6410 if (res->acl_scratch != NULL) {
6411 void *p = page_address(res->acl_scratch);
6412 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6413 }
6414 status = decode_compound_hdr(xdr, &hdr);
6415 if (status)
6416 goto out;
6417 status = decode_sequence(xdr, &res->seq_res, rqstp);
6418 if (status)
6419 goto out;
6420 status = decode_putfh(xdr);
6421 if (status)
6422 goto out;
6423 status = decode_getacl(xdr, rqstp, res);
6424
6425out:
6426 return status;
6427}
6428
6429/*
6430 * Decode CLOSE response
6431 */
6432static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6433 void *data)
6434{
6435 struct nfs_closeres *res = data;
6436 struct compound_hdr hdr;
6437 int status;
6438
6439 status = decode_compound_hdr(xdr, &hdr);
6440 if (status)
6441 goto out;
6442 status = decode_sequence(xdr, &res->seq_res, rqstp);
6443 if (status)
6444 goto out;
6445 status = decode_putfh(xdr);
6446 if (status)
6447 goto out;
6448 if (res->lr_res) {
6449 status = decode_layoutreturn(xdr, res->lr_res);
6450 res->lr_ret = status;
6451 if (status)
6452 goto out;
6453 }
6454 if (res->fattr != NULL) {
6455 status = decode_getfattr(xdr, res->fattr, res->server);
6456 if (status != 0)
6457 goto out;
6458 }
6459 status = decode_close(xdr, res);
6460out:
6461 return status;
6462}
6463
6464/*
6465 * Decode OPEN response
6466 */
6467static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6468 void *data)
6469{
6470 struct nfs_openres *res = data;
6471 struct compound_hdr hdr;
6472 int status;
6473
6474 status = decode_compound_hdr(xdr, &hdr);
6475 if (status)
6476 goto out;
6477 status = decode_sequence(xdr, &res->seq_res, rqstp);
6478 if (status)
6479 goto out;
6480 status = decode_putfh(xdr);
6481 if (status)
6482 goto out;
6483 status = decode_open(xdr, res);
6484 if (status)
6485 goto out;
6486 status = decode_getfh(xdr, &res->fh);
6487 if (status)
6488 goto out;
6489 if (res->access_request)
6490 decode_access(xdr, &res->access_supported, &res->access_result);
6491 decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6492 if (res->lg_res)
6493 decode_layoutget(xdr, rqstp, res->lg_res);
6494out:
6495 return status;
6496}
6497
6498/*
6499 * Decode OPEN_CONFIRM response
6500 */
6501static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6502 struct xdr_stream *xdr,
6503 void *data)
6504{
6505 struct nfs_open_confirmres *res = data;
6506 struct compound_hdr hdr;
6507 int status;
6508
6509 status = decode_compound_hdr(xdr, &hdr);
6510 if (status)
6511 goto out;
6512 status = decode_putfh(xdr);
6513 if (status)
6514 goto out;
6515 status = decode_open_confirm(xdr, res);
6516out:
6517 return status;
6518}
6519
6520/*
6521 * Decode OPEN response
6522 */
6523static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6524 struct xdr_stream *xdr,
6525 void *data)
6526{
6527 struct nfs_openres *res = data;
6528 struct compound_hdr hdr;
6529 int status;
6530
6531 status = decode_compound_hdr(xdr, &hdr);
6532 if (status)
6533 goto out;
6534 status = decode_sequence(xdr, &res->seq_res, rqstp);
6535 if (status)
6536 goto out;
6537 status = decode_putfh(xdr);
6538 if (status)
6539 goto out;
6540 status = decode_open(xdr, res);
6541 if (status)
6542 goto out;
6543 if (res->access_request)
6544 decode_access(xdr, &res->access_supported, &res->access_result);
6545 decode_getfattr(xdr, res->f_attr, res->server);
6546 if (res->lg_res)
6547 decode_layoutget(xdr, rqstp, res->lg_res);
6548out:
6549 return status;
6550}
6551
6552/*
6553 * Decode SETATTR response
6554 */
6555static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6556 struct xdr_stream *xdr,
6557 void *data)
6558{
6559 struct nfs_setattrres *res = data;
6560 struct compound_hdr hdr;
6561 int status;
6562
6563 status = decode_compound_hdr(xdr, &hdr);
6564 if (status)
6565 goto out;
6566 status = decode_sequence(xdr, &res->seq_res, rqstp);
6567 if (status)
6568 goto out;
6569 status = decode_putfh(xdr);
6570 if (status)
6571 goto out;
6572 status = decode_setattr(xdr);
6573 if (status)
6574 goto out;
6575 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6576out:
6577 return status;
6578}
6579
6580/*
6581 * Decode LOCK response
6582 */
6583static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6584 void *data)
6585{
6586 struct nfs_lock_res *res = data;
6587 struct compound_hdr hdr;
6588 int status;
6589
6590 status = decode_compound_hdr(xdr, &hdr);
6591 if (status)
6592 goto out;
6593 status = decode_sequence(xdr, &res->seq_res, rqstp);
6594 if (status)
6595 goto out;
6596 status = decode_putfh(xdr);
6597 if (status)
6598 goto out;
6599 status = decode_lock(xdr, res);
6600out:
6601 return status;
6602}
6603
6604/*
6605 * Decode LOCKT response
6606 */
6607static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6608 void *data)
6609{
6610 struct nfs_lockt_res *res = data;
6611 struct compound_hdr hdr;
6612 int status;
6613
6614 status = decode_compound_hdr(xdr, &hdr);
6615 if (status)
6616 goto out;
6617 status = decode_sequence(xdr, &res->seq_res, rqstp);
6618 if (status)
6619 goto out;
6620 status = decode_putfh(xdr);
6621 if (status)
6622 goto out;
6623 status = decode_lockt(xdr, res);
6624out:
6625 return status;
6626}
6627
6628/*
6629 * Decode LOCKU response
6630 */
6631static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6632 void *data)
6633{
6634 struct nfs_locku_res *res = data;
6635 struct compound_hdr hdr;
6636 int status;
6637
6638 status = decode_compound_hdr(xdr, &hdr);
6639 if (status)
6640 goto out;
6641 status = decode_sequence(xdr, &res->seq_res, rqstp);
6642 if (status)
6643 goto out;
6644 status = decode_putfh(xdr);
6645 if (status)
6646 goto out;
6647 status = decode_locku(xdr, res);
6648out:
6649 return status;
6650}
6651
6652static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6653 struct xdr_stream *xdr, void *dummy)
6654{
6655 struct compound_hdr hdr;
6656 int status;
6657
6658 status = decode_compound_hdr(xdr, &hdr);
6659 if (!status)
6660 status = decode_release_lockowner(xdr);
6661 return status;
6662}
6663
6664/*
6665 * Decode READLINK response
6666 */
6667static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6668 struct xdr_stream *xdr,
6669 void *data)
6670{
6671 struct nfs4_readlink_res *res = data;
6672 struct compound_hdr hdr;
6673 int status;
6674
6675 status = decode_compound_hdr(xdr, &hdr);
6676 if (status)
6677 goto out;
6678 status = decode_sequence(xdr, &res->seq_res, rqstp);
6679 if (status)
6680 goto out;
6681 status = decode_putfh(xdr);
6682 if (status)
6683 goto out;
6684 status = decode_readlink(xdr, rqstp);
6685out:
6686 return status;
6687}
6688
6689/*
6690 * Decode READDIR response
6691 */
6692static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6693 void *data)
6694{
6695 struct nfs4_readdir_res *res = data;
6696 struct compound_hdr hdr;
6697 int status;
6698
6699 status = decode_compound_hdr(xdr, &hdr);
6700 if (status)
6701 goto out;
6702 status = decode_sequence(xdr, &res->seq_res, rqstp);
6703 if (status)
6704 goto out;
6705 status = decode_putfh(xdr);
6706 if (status)
6707 goto out;
6708 status = decode_readdir(xdr, rqstp, res);
6709out:
6710 return status;
6711}
6712
6713/*
6714 * Decode Read response
6715 */
6716static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6717 void *data)
6718{
6719 struct nfs_pgio_res *res = data;
6720 struct compound_hdr hdr;
6721 int status;
6722
6723 status = decode_compound_hdr(xdr, &hdr);
6724 res->op_status = hdr.status;
6725 if (status)
6726 goto out;
6727 status = decode_sequence(xdr, &res->seq_res, rqstp);
6728 if (status)
6729 goto out;
6730 status = decode_putfh(xdr);
6731 if (status)
6732 goto out;
6733 status = decode_read(xdr, rqstp, res);
6734 if (!status)
6735 status = res->count;
6736out:
6737 return status;
6738}
6739
6740/*
6741 * Decode WRITE response
6742 */
6743static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6744 void *data)
6745{
6746 struct nfs_pgio_res *res = data;
6747 struct compound_hdr hdr;
6748 int status;
6749
6750 status = decode_compound_hdr(xdr, &hdr);
6751 res->op_status = hdr.status;
6752 if (status)
6753 goto out;
6754 status = decode_sequence(xdr, &res->seq_res, rqstp);
6755 if (status)
6756 goto out;
6757 status = decode_putfh(xdr);
6758 if (status)
6759 goto out;
6760 status = decode_write(xdr, res);
6761 if (status)
6762 goto out;
6763 if (res->fattr)
6764 decode_getfattr(xdr, res->fattr, res->server);
6765 if (!status)
6766 status = res->count;
6767out:
6768 return status;
6769}
6770
6771/*
6772 * Decode COMMIT response
6773 */
6774static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6775 void *data)
6776{
6777 struct nfs_commitres *res = data;
6778 struct compound_hdr hdr;
6779 int status;
6780
6781 status = decode_compound_hdr(xdr, &hdr);
6782 res->op_status = hdr.status;
6783 if (status)
6784 goto out;
6785 status = decode_sequence(xdr, &res->seq_res, rqstp);
6786 if (status)
6787 goto out;
6788 status = decode_putfh(xdr);
6789 if (status)
6790 goto out;
6791 status = decode_commit(xdr, res);
6792out:
6793 return status;
6794}
6795
6796/*
6797 * Decode FSINFO response
6798 */
6799static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6800 void *data)
6801{
6802 struct nfs4_fsinfo_res *res = data;
6803 struct compound_hdr hdr;
6804 int status;
6805
6806 status = decode_compound_hdr(xdr, &hdr);
6807 if (!status)
6808 status = decode_sequence(xdr, &res->seq_res, req);
6809 if (!status)
6810 status = decode_putfh(xdr);
6811 if (!status)
6812 status = decode_fsinfo(xdr, res->fsinfo);
6813 return status;
6814}
6815
6816/*
6817 * Decode PATHCONF response
6818 */
6819static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6820 void *data)
6821{
6822 struct nfs4_pathconf_res *res = data;
6823 struct compound_hdr hdr;
6824 int status;
6825
6826 status = decode_compound_hdr(xdr, &hdr);
6827 if (!status)
6828 status = decode_sequence(xdr, &res->seq_res, req);
6829 if (!status)
6830 status = decode_putfh(xdr);
6831 if (!status)
6832 status = decode_pathconf(xdr, res->pathconf);
6833 return status;
6834}
6835
6836/*
6837 * Decode STATFS response
6838 */
6839static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6840 void *data)
6841{
6842 struct nfs4_statfs_res *res = data;
6843 struct compound_hdr hdr;
6844 int status;
6845
6846 status = decode_compound_hdr(xdr, &hdr);
6847 if (!status)
6848 status = decode_sequence(xdr, &res->seq_res, req);
6849 if (!status)
6850 status = decode_putfh(xdr);
6851 if (!status)
6852 status = decode_statfs(xdr, res->fsstat);
6853 return status;
6854}
6855
6856/*
6857 * Decode GETATTR_BITMAP response
6858 */
6859static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6860 struct xdr_stream *xdr,
6861 void *data)
6862{
6863 struct nfs4_server_caps_res *res = data;
6864 struct compound_hdr hdr;
6865 int status;
6866
6867 status = decode_compound_hdr(xdr, &hdr);
6868 if (status)
6869 goto out;
6870 status = decode_sequence(xdr, &res->seq_res, req);
6871 if (status)
6872 goto out;
6873 status = decode_putfh(xdr);
6874 if (status)
6875 goto out;
6876 status = decode_server_caps(xdr, res);
6877out:
6878 return status;
6879}
6880
6881/*
6882 * Decode RENEW response
6883 */
6884static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6885 void *__unused)
6886{
6887 struct compound_hdr hdr;
6888 int status;
6889
6890 status = decode_compound_hdr(xdr, &hdr);
6891 if (!status)
6892 status = decode_renew(xdr);
6893 return status;
6894}
6895
6896/*
6897 * Decode SETCLIENTID response
6898 */
6899static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6900 struct xdr_stream *xdr,
6901 void *data)
6902{
6903 struct nfs4_setclientid_res *res = data;
6904 struct compound_hdr hdr;
6905 int status;
6906
6907 status = decode_compound_hdr(xdr, &hdr);
6908 if (!status)
6909 status = decode_setclientid(xdr, res);
6910 return status;
6911}
6912
6913/*
6914 * Decode SETCLIENTID_CONFIRM response
6915 */
6916static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6917 struct xdr_stream *xdr,
6918 void *data)
6919{
6920 struct compound_hdr hdr;
6921 int status;
6922
6923 status = decode_compound_hdr(xdr, &hdr);
6924 if (!status)
6925 status = decode_setclientid_confirm(xdr);
6926 return status;
6927}
6928
6929/*
6930 * Decode DELEGRETURN response
6931 */
6932static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6933 struct xdr_stream *xdr,
6934 void *data)
6935{
6936 struct nfs4_delegreturnres *res = data;
6937 struct compound_hdr hdr;
6938 int status;
6939
6940 status = decode_compound_hdr(xdr, &hdr);
6941 if (status)
6942 goto out;
6943 status = decode_sequence(xdr, &res->seq_res, rqstp);
6944 if (status)
6945 goto out;
6946 status = decode_putfh(xdr);
6947 if (status != 0)
6948 goto out;
6949 if (res->lr_res) {
6950 status = decode_layoutreturn(xdr, res->lr_res);
6951 res->lr_ret = status;
6952 if (status)
6953 goto out;
6954 }
6955 if (res->fattr) {
6956 status = decode_getfattr(xdr, res->fattr, res->server);
6957 if (status != 0)
6958 goto out;
6959 }
6960 status = decode_delegreturn(xdr);
6961out:
6962 return status;
6963}
6964
6965/*
6966 * Decode FS_LOCATIONS response
6967 */
6968static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6969 struct xdr_stream *xdr,
6970 void *data)
6971{
6972 struct nfs4_fs_locations_res *res = data;
6973 struct compound_hdr hdr;
6974 int status;
6975
6976 status = decode_compound_hdr(xdr, &hdr);
6977 if (status)
6978 goto out;
6979 status = decode_sequence(xdr, &res->seq_res, req);
6980 if (status)
6981 goto out;
6982 status = decode_putfh(xdr);
6983 if (status)
6984 goto out;
6985 if (res->migration) {
6986 xdr_enter_page(xdr, PAGE_SIZE);
6987 status = decode_getfattr_generic(xdr,
6988 &res->fs_locations->fattr,
6989 NULL, res->fs_locations,
6990 NULL, res->fs_locations->server);
6991 if (status)
6992 goto out;
6993 if (res->renew)
6994 status = decode_renew(xdr);
6995 } else {
6996 status = decode_lookup(xdr);
6997 if (status)
6998 goto out;
6999 xdr_enter_page(xdr, PAGE_SIZE);
7000 status = decode_getfattr_generic(xdr,
7001 &res->fs_locations->fattr,
7002 NULL, res->fs_locations,
7003 NULL, res->fs_locations->server);
7004 }
7005out:
7006 return status;
7007}
7008
7009/*
7010 * Decode SECINFO response
7011 */
7012static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7013 struct xdr_stream *xdr,
7014 void *data)
7015{
7016 struct nfs4_secinfo_res *res = data;
7017 struct compound_hdr hdr;
7018 int status;
7019
7020 status = decode_compound_hdr(xdr, &hdr);
7021 if (status)
7022 goto out;
7023 status = decode_sequence(xdr, &res->seq_res, rqstp);
7024 if (status)
7025 goto out;
7026 status = decode_putfh(xdr);
7027 if (status)
7028 goto out;
7029 status = decode_secinfo(xdr, res);
7030out:
7031 return status;
7032}
7033
7034/*
7035 * Decode FSID_PRESENT response
7036 */
7037static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7038 struct xdr_stream *xdr,
7039 void *data)
7040{
7041 struct nfs4_fsid_present_res *res = data;
7042 struct compound_hdr hdr;
7043 int status;
7044
7045 status = decode_compound_hdr(xdr, &hdr);
7046 if (status)
7047 goto out;
7048 status = decode_sequence(xdr, &res->seq_res, rqstp);
7049 if (status)
7050 goto out;
7051 status = decode_putfh(xdr);
7052 if (status)
7053 goto out;
7054 status = decode_getfh(xdr, res->fh);
7055 if (status)
7056 goto out;
7057 if (res->renew)
7058 status = decode_renew(xdr);
7059out:
7060 return status;
7061}
7062
7063#if defined(CONFIG_NFS_V4_1)
7064/*
7065 * Decode BIND_CONN_TO_SESSION response
7066 */
7067static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7068 struct xdr_stream *xdr,
7069 void *res)
7070{
7071 struct compound_hdr hdr;
7072 int status;
7073
7074 status = decode_compound_hdr(xdr, &hdr);
7075 if (!status)
7076 status = decode_bind_conn_to_session(xdr, res);
7077 return status;
7078}
7079
7080/*
7081 * Decode EXCHANGE_ID response
7082 */
7083static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7084 struct xdr_stream *xdr,
7085 void *res)
7086{
7087 struct compound_hdr hdr;
7088 int status;
7089
7090 status = decode_compound_hdr(xdr, &hdr);
7091 if (!status)
7092 status = decode_exchange_id(xdr, res);
7093 return status;
7094}
7095
7096/*
7097 * Decode CREATE_SESSION response
7098 */
7099static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7100 struct xdr_stream *xdr,
7101 void *res)
7102{
7103 struct compound_hdr hdr;
7104 int status;
7105
7106 status = decode_compound_hdr(xdr, &hdr);
7107 if (!status)
7108 status = decode_create_session(xdr, res);
7109 return status;
7110}
7111
7112/*
7113 * Decode DESTROY_SESSION response
7114 */
7115static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7116 struct xdr_stream *xdr,
7117 void *res)
7118{
7119 struct compound_hdr hdr;
7120 int status;
7121
7122 status = decode_compound_hdr(xdr, &hdr);
7123 if (!status)
7124 status = decode_destroy_session(xdr, res);
7125 return status;
7126}
7127
7128/*
7129 * Decode DESTROY_CLIENTID response
7130 */
7131static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7132 struct xdr_stream *xdr,
7133 void *res)
7134{
7135 struct compound_hdr hdr;
7136 int status;
7137
7138 status = decode_compound_hdr(xdr, &hdr);
7139 if (!status)
7140 status = decode_destroy_clientid(xdr, res);
7141 return status;
7142}
7143
7144/*
7145 * Decode SEQUENCE response
7146 */
7147static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7148 struct xdr_stream *xdr,
7149 void *res)
7150{
7151 struct compound_hdr hdr;
7152 int status;
7153
7154 status = decode_compound_hdr(xdr, &hdr);
7155 if (!status)
7156 status = decode_sequence(xdr, res, rqstp);
7157 return status;
7158}
7159
7160#endif
7161
7162/*
7163 * Decode GET_LEASE_TIME response
7164 */
7165static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7166 struct xdr_stream *xdr,
7167 void *data)
7168{
7169 struct nfs4_get_lease_time_res *res = data;
7170 struct compound_hdr hdr;
7171 int status;
7172
7173 status = decode_compound_hdr(xdr, &hdr);
7174 if (!status)
7175 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7176 if (!status)
7177 status = decode_putrootfh(xdr);
7178 if (!status)
7179 status = decode_fsinfo(xdr, res->lr_fsinfo);
7180 return status;
7181}
7182
7183#ifdef CONFIG_NFS_V4_1
7184
7185/*
7186 * Decode RECLAIM_COMPLETE response
7187 */
7188static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7189 struct xdr_stream *xdr,
7190 void *data)
7191{
7192 struct nfs41_reclaim_complete_res *res = data;
7193 struct compound_hdr hdr;
7194 int status;
7195
7196 status = decode_compound_hdr(xdr, &hdr);
7197 if (!status)
7198 status = decode_sequence(xdr, &res->seq_res, rqstp);
7199 if (!status)
7200 status = decode_reclaim_complete(xdr, NULL);
7201 return status;
7202}
7203
7204/*
7205 * Decode GETDEVINFO response
7206 */
7207static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7208 struct xdr_stream *xdr,
7209 void *data)
7210{
7211 struct nfs4_getdeviceinfo_res *res = data;
7212 struct compound_hdr hdr;
7213 int status;
7214
7215 status = decode_compound_hdr(xdr, &hdr);
7216 if (status != 0)
7217 goto out;
7218 status = decode_sequence(xdr, &res->seq_res, rqstp);
7219 if (status != 0)
7220 goto out;
7221 status = decode_getdeviceinfo(xdr, res);
7222out:
7223 return status;
7224}
7225
7226/*
7227 * Decode LAYOUTGET response
7228 */
7229static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7230 struct xdr_stream *xdr,
7231 void *data)
7232{
7233 struct nfs4_layoutget_res *res = data;
7234 struct compound_hdr hdr;
7235 int status;
7236
7237 status = decode_compound_hdr(xdr, &hdr);
7238 if (status)
7239 goto out;
7240 status = decode_sequence(xdr, &res->seq_res, rqstp);
7241 if (status)
7242 goto out;
7243 status = decode_putfh(xdr);
7244 if (status)
7245 goto out;
7246 status = decode_layoutget(xdr, rqstp, res);
7247out:
7248 return status;
7249}
7250
7251/*
7252 * Decode LAYOUTRETURN response
7253 */
7254static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7255 struct xdr_stream *xdr,
7256 void *data)
7257{
7258 struct nfs4_layoutreturn_res *res = data;
7259 struct compound_hdr hdr;
7260 int status;
7261
7262 status = decode_compound_hdr(xdr, &hdr);
7263 if (status)
7264 goto out;
7265 status = decode_sequence(xdr, &res->seq_res, rqstp);
7266 if (status)
7267 goto out;
7268 status = decode_putfh(xdr);
7269 if (status)
7270 goto out;
7271 status = decode_layoutreturn(xdr, res);
7272out:
7273 return status;
7274}
7275
7276/*
7277 * Decode LAYOUTCOMMIT response
7278 */
7279static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7280 struct xdr_stream *xdr,
7281 void *data)
7282{
7283 struct nfs4_layoutcommit_res *res = data;
7284 struct compound_hdr hdr;
7285 int status;
7286
7287 status = decode_compound_hdr(xdr, &hdr);
7288 if (status)
7289 goto out;
7290 status = decode_sequence(xdr, &res->seq_res, rqstp);
7291 if (status)
7292 goto out;
7293 status = decode_putfh(xdr);
7294 if (status)
7295 goto out;
7296 status = decode_layoutcommit(xdr, rqstp, res);
7297 if (status)
7298 goto out;
7299 decode_getfattr(xdr, res->fattr, res->server);
7300out:
7301 return status;
7302}
7303
7304/*
7305 * Decode SECINFO_NO_NAME response
7306 */
7307static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7308 struct xdr_stream *xdr,
7309 void *data)
7310{
7311 struct nfs4_secinfo_res *res = data;
7312 struct compound_hdr hdr;
7313 int status;
7314
7315 status = decode_compound_hdr(xdr, &hdr);
7316 if (status)
7317 goto out;
7318 status = decode_sequence(xdr, &res->seq_res, rqstp);
7319 if (status)
7320 goto out;
7321 status = decode_putrootfh(xdr);
7322 if (status)
7323 goto out;
7324 status = decode_secinfo_no_name(xdr, res);
7325out:
7326 return status;
7327}
7328
7329/*
7330 * Decode TEST_STATEID response
7331 */
7332static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7333 struct xdr_stream *xdr,
7334 void *data)
7335{
7336 struct nfs41_test_stateid_res *res = data;
7337 struct compound_hdr hdr;
7338 int status;
7339
7340 status = decode_compound_hdr(xdr, &hdr);
7341 if (status)
7342 goto out;
7343 status = decode_sequence(xdr, &res->seq_res, rqstp);
7344 if (status)
7345 goto out;
7346 status = decode_test_stateid(xdr, res);
7347out:
7348 return status;
7349}
7350
7351/*
7352 * Decode FREE_STATEID response
7353 */
7354static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7355 struct xdr_stream *xdr,
7356 void *data)
7357{
7358 struct nfs41_free_stateid_res *res = data;
7359 struct compound_hdr hdr;
7360 int status;
7361
7362 status = decode_compound_hdr(xdr, &hdr);
7363 if (status)
7364 goto out;
7365 status = decode_sequence(xdr, &res->seq_res, rqstp);
7366 if (status)
7367 goto out;
7368 status = decode_free_stateid(xdr, res);
7369out:
7370 return status;
7371}
7372#endif /* CONFIG_NFS_V4_1 */
7373
7374/**
7375 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7376 * the local page cache.
7377 * @xdr: XDR stream where entry resides
7378 * @entry: buffer to fill in with entry data
7379 * @plus: boolean indicating whether this should be a readdirplus entry
7380 *
7381 * Returns zero if successful, otherwise a negative errno value is
7382 * returned.
7383 *
7384 * This function is not invoked during READDIR reply decoding, but
7385 * rather whenever an application invokes the getdents(2) system call
7386 * on a directory already in our cache.
7387 */
7388int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7389 bool plus)
7390{
7391 unsigned int savep;
7392 uint32_t bitmap[3] = {0};
7393 uint32_t len;
7394 uint64_t new_cookie;
7395 __be32 *p = xdr_inline_decode(xdr, 4);
7396 if (unlikely(!p))
7397 return -EAGAIN;
7398 if (*p == xdr_zero) {
7399 p = xdr_inline_decode(xdr, 4);
7400 if (unlikely(!p))
7401 return -EAGAIN;
7402 if (*p == xdr_zero)
7403 return -EAGAIN;
7404 entry->eof = 1;
7405 return -EBADCOOKIE;
7406 }
7407
7408 p = xdr_inline_decode(xdr, 12);
7409 if (unlikely(!p))
7410 return -EAGAIN;
7411 p = xdr_decode_hyper(p, &new_cookie);
7412 entry->len = be32_to_cpup(p);
7413
7414 p = xdr_inline_decode(xdr, entry->len);
7415 if (unlikely(!p))
7416 return -EAGAIN;
7417 entry->name = (const char *) p;
7418
7419 /*
7420 * In case the server doesn't return an inode number,
7421 * we fake one here. (We don't use inode number 0,
7422 * since glibc seems to choke on it...)
7423 */
7424 entry->ino = 1;
7425 entry->fattr->valid = 0;
7426
7427 if (decode_attr_bitmap(xdr, bitmap) < 0)
7428 return -EAGAIN;
7429
7430 if (decode_attr_length(xdr, &len, &savep) < 0)
7431 return -EAGAIN;
7432
7433 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7434 NULL, entry->label, entry->server) < 0)
7435 return -EAGAIN;
7436 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7437 entry->ino = entry->fattr->mounted_on_fileid;
7438 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7439 entry->ino = entry->fattr->fileid;
7440
7441 entry->d_type = DT_UNKNOWN;
7442 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7443 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7444
7445 entry->prev_cookie = entry->cookie;
7446 entry->cookie = new_cookie;
7447
7448 return 0;
7449}
7450
7451/*
7452 * We need to translate between nfs status return values and
7453 * the local errno values which may not be the same.
7454 */
7455static struct {
7456 int stat;
7457 int errno;
7458} nfs_errtbl[] = {
7459 { NFS4_OK, 0 },
7460 { NFS4ERR_PERM, -EPERM },
7461 { NFS4ERR_NOENT, -ENOENT },
7462 { NFS4ERR_IO, -errno_NFSERR_IO},
7463 { NFS4ERR_NXIO, -ENXIO },
7464 { NFS4ERR_ACCESS, -EACCES },
7465 { NFS4ERR_EXIST, -EEXIST },
7466 { NFS4ERR_XDEV, -EXDEV },
7467 { NFS4ERR_NOTDIR, -ENOTDIR },
7468 { NFS4ERR_ISDIR, -EISDIR },
7469 { NFS4ERR_INVAL, -EINVAL },
7470 { NFS4ERR_FBIG, -EFBIG },
7471 { NFS4ERR_NOSPC, -ENOSPC },
7472 { NFS4ERR_ROFS, -EROFS },
7473 { NFS4ERR_MLINK, -EMLINK },
7474 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7475 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7476 { NFS4ERR_DQUOT, -EDQUOT },
7477 { NFS4ERR_STALE, -ESTALE },
7478 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7479 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7480 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7481 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7482 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7483 { NFS4ERR_BADTYPE, -EBADTYPE },
7484 { NFS4ERR_LOCKED, -EAGAIN },
7485 { NFS4ERR_SYMLINK, -ELOOP },
7486 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7487 { NFS4ERR_DEADLOCK, -EDEADLK },
7488 { NFS4ERR_NOXATTR, -ENODATA },
7489 { NFS4ERR_XATTR2BIG, -E2BIG },
7490 { -1, -EIO }
7491};
7492
7493/*
7494 * Convert an NFS error code to a local one.
7495 * This one is used jointly by NFSv2 and NFSv3.
7496 */
7497static int
7498nfs4_stat_to_errno(int stat)
7499{
7500 int i;
7501 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7502 if (nfs_errtbl[i].stat == stat)
7503 return nfs_errtbl[i].errno;
7504 }
7505 if (stat <= 10000 || stat > 10100) {
7506 /* The server is looney tunes. */
7507 return -EREMOTEIO;
7508 }
7509 /* If we cannot translate the error, the recovery routines should
7510 * handle it.
7511 * Note: remaining NFSv4 error codes have values > 10000, so should
7512 * not conflict with native Linux error codes.
7513 */
7514 return -stat;
7515}
7516
7517#ifdef CONFIG_NFS_V4_2
7518#include "nfs42xdr.c"
7519#endif /* CONFIG_NFS_V4_2 */
7520
7521#define PROC(proc, argtype, restype) \
7522[NFSPROC4_CLNT_##proc] = { \
7523 .p_proc = NFSPROC4_COMPOUND, \
7524 .p_encode = nfs4_xdr_##argtype, \
7525 .p_decode = nfs4_xdr_##restype, \
7526 .p_arglen = NFS4_##argtype##_sz, \
7527 .p_replen = NFS4_##restype##_sz, \
7528 .p_statidx = NFSPROC4_CLNT_##proc, \
7529 .p_name = #proc, \
7530}
7531
7532#define STUB(proc) \
7533[NFSPROC4_CLNT_##proc] = { \
7534 .p_name = #proc, \
7535}
7536
7537#if defined(CONFIG_NFS_V4_1)
7538#define PROC41(proc, argtype, restype) \
7539 PROC(proc, argtype, restype)
7540#else
7541#define PROC41(proc, argtype, restype) \
7542 STUB(proc)
7543#endif
7544
7545#if defined(CONFIG_NFS_V4_2)
7546#define PROC42(proc, argtype, restype) \
7547 PROC(proc, argtype, restype)
7548#else
7549#define PROC42(proc, argtype, restype) \
7550 STUB(proc)
7551#endif
7552
7553const struct rpc_procinfo nfs4_procedures[] = {
7554 PROC(READ, enc_read, dec_read),
7555 PROC(WRITE, enc_write, dec_write),
7556 PROC(COMMIT, enc_commit, dec_commit),
7557 PROC(OPEN, enc_open, dec_open),
7558 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7559 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7560 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7561 PROC(CLOSE, enc_close, dec_close),
7562 PROC(SETATTR, enc_setattr, dec_setattr),
7563 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7564 PROC(RENEW, enc_renew, dec_renew),
7565 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7566 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7567 PROC(LOCK, enc_lock, dec_lock),
7568 PROC(LOCKT, enc_lockt, dec_lockt),
7569 PROC(LOCKU, enc_locku, dec_locku),
7570 PROC(ACCESS, enc_access, dec_access),
7571 PROC(GETATTR, enc_getattr, dec_getattr),
7572 PROC(LOOKUP, enc_lookup, dec_lookup),
7573 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7574 PROC(REMOVE, enc_remove, dec_remove),
7575 PROC(RENAME, enc_rename, dec_rename),
7576 PROC(LINK, enc_link, dec_link),
7577 PROC(SYMLINK, enc_symlink, dec_symlink),
7578 PROC(CREATE, enc_create, dec_create),
7579 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7580 PROC(STATFS, enc_statfs, dec_statfs),
7581 PROC(READLINK, enc_readlink, dec_readlink),
7582 PROC(READDIR, enc_readdir, dec_readdir),
7583 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7584 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7585 PROC(GETACL, enc_getacl, dec_getacl),
7586 PROC(SETACL, enc_setacl, dec_setacl),
7587 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7588 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7589 PROC(SECINFO, enc_secinfo, dec_secinfo),
7590 PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present),
7591 PROC41(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7592 PROC41(CREATE_SESSION, enc_create_session, dec_create_session),
7593 PROC41(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7594 PROC41(SEQUENCE, enc_sequence, dec_sequence),
7595 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7596 PROC41(RECLAIM_COMPLETE,enc_reclaim_complete, dec_reclaim_complete),
7597 PROC41(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7598 PROC41(LAYOUTGET, enc_layoutget, dec_layoutget),
7599 PROC41(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7600 PROC41(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7601 PROC41(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7602 PROC41(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7603 PROC41(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7604 STUB(GETDEVICELIST),
7605 PROC41(BIND_CONN_TO_SESSION,
7606 enc_bind_conn_to_session, dec_bind_conn_to_session),
7607 PROC41(DESTROY_CLIENTID,enc_destroy_clientid, dec_destroy_clientid),
7608 PROC42(SEEK, enc_seek, dec_seek),
7609 PROC42(ALLOCATE, enc_allocate, dec_allocate),
7610 PROC42(DEALLOCATE, enc_deallocate, dec_deallocate),
7611 PROC42(LAYOUTSTATS, enc_layoutstats, dec_layoutstats),
7612 PROC42(CLONE, enc_clone, dec_clone),
7613 PROC42(COPY, enc_copy, dec_copy),
7614 PROC42(OFFLOAD_CANCEL, enc_offload_cancel, dec_offload_cancel),
7615 PROC42(COPY_NOTIFY, enc_copy_notify, dec_copy_notify),
7616 PROC(LOOKUPP, enc_lookupp, dec_lookupp),
7617 PROC42(LAYOUTERROR, enc_layouterror, dec_layouterror),
7618 PROC42(GETXATTR, enc_getxattr, dec_getxattr),
7619 PROC42(SETXATTR, enc_setxattr, dec_setxattr),
7620 PROC42(LISTXATTRS, enc_listxattrs, dec_listxattrs),
7621 PROC42(REMOVEXATTR, enc_removexattr, dec_removexattr),
7622};
7623
7624static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7625const struct rpc_version nfs_version4 = {
7626 .number = 4,
7627 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7628 .procs = nfs4_procedures,
7629 .counts = nfs_version4_counts,
7630};
7631
7632/*
7633 * Local variables:
7634 * c-basic-offset: 8
7635 * End:
7636 */
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#include <linux/fs_struct.h>
56
57#include "nfs4_fs.h"
58#include "internal.h"
59#include "nfs4idmap.h"
60#include "nfs4session.h"
61#include "pnfs.h"
62#include "netns.h"
63
64#define NFSDBG_FACILITY NFSDBG_XDR
65
66/* Mapping from NFS error code to "errno" error code. */
67#define errno_NFSERR_IO EIO
68
69static int nfs4_stat_to_errno(int);
70
71/* NFSv4 COMPOUND tags are only wanted for debugging purposes */
72#ifdef DEBUG
73#define NFS4_MAXTAGLEN 20
74#else
75#define NFS4_MAXTAGLEN 0
76#endif
77
78/* lock,open owner id:
79 * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
80 */
81#define open_owner_id_maxsz (1 + 2 + 1 + 1 + 2)
82#define lock_owner_id_maxsz (1 + 1 + 4)
83#define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
84#define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
85#define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
86#define op_encode_hdr_maxsz (1)
87#define op_decode_hdr_maxsz (2)
88#define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
89#define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
90#define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
91#define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
92#define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
93 (NFS4_FHSIZE >> 2))
94#define decode_putfh_maxsz (op_decode_hdr_maxsz)
95#define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
96#define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
97#define encode_getfh_maxsz (op_encode_hdr_maxsz)
98#define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
99 ((3+NFS4_FHSIZE) >> 2))
100#define nfs4_fattr_bitmap_maxsz 4
101#define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
102#define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
103#define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
104#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
105#define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
106#ifdef CONFIG_NFS_V4_SECURITY_LABEL
107/* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
108#define nfs4_label_maxsz (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
109#else
110#define nfs4_label_maxsz 0
111#endif
112/* We support only one layout type per file system */
113#define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
114/* This is based on getfattr, which uses the most attributes: */
115#define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
116 3 + 3 + 3 + nfs4_owner_maxsz + \
117 nfs4_group_maxsz + nfs4_label_maxsz + \
118 decode_mdsthreshold_maxsz))
119#define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
120 nfs4_fattr_value_maxsz)
121#define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
122#define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
123 1 + 2 + 1 + \
124 nfs4_owner_maxsz + \
125 nfs4_group_maxsz + \
126 nfs4_label_maxsz + \
127 4 + 4)
128#define encode_savefh_maxsz (op_encode_hdr_maxsz)
129#define decode_savefh_maxsz (op_decode_hdr_maxsz)
130#define encode_restorefh_maxsz (op_encode_hdr_maxsz)
131#define decode_restorefh_maxsz (op_decode_hdr_maxsz)
132#define encode_fsinfo_maxsz (encode_getattr_maxsz)
133/* The 5 accounts for the PNFS attributes, and assumes that at most three
134 * layout types will be returned.
135 */
136#define decode_fsinfo_maxsz (op_decode_hdr_maxsz + \
137 nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
138#define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
139#define decode_renew_maxsz (op_decode_hdr_maxsz)
140#define encode_setclientid_maxsz \
141 (op_encode_hdr_maxsz + \
142 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
143 /* client name */ \
144 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
145 1 /* sc_prog */ + \
146 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
147 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
148 1) /* sc_cb_ident */
149#define decode_setclientid_maxsz \
150 (op_decode_hdr_maxsz + \
151 2 /* clientid */ + \
152 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
153 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
154 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
155#define encode_setclientid_confirm_maxsz \
156 (op_encode_hdr_maxsz + \
157 3 + (NFS4_VERIFIER_SIZE >> 2))
158#define decode_setclientid_confirm_maxsz \
159 (op_decode_hdr_maxsz)
160#define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
161#define decode_lookup_maxsz (op_decode_hdr_maxsz)
162#define encode_share_access_maxsz \
163 (2)
164#define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
165#define encode_opentype_maxsz (1 + encode_createmode_maxsz)
166#define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
167#define encode_open_maxsz (op_encode_hdr_maxsz + \
168 2 + encode_share_access_maxsz + 2 + \
169 open_owner_id_maxsz + \
170 encode_opentype_maxsz + \
171 encode_claim_null_maxsz)
172#define decode_ace_maxsz (3 + nfs4_owner_maxsz)
173#define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
174 decode_ace_maxsz)
175#define decode_change_info_maxsz (5)
176#define decode_open_maxsz (op_decode_hdr_maxsz + \
177 decode_stateid_maxsz + \
178 decode_change_info_maxsz + 1 + \
179 nfs4_fattr_bitmap_maxsz + \
180 decode_delegation_maxsz)
181#define encode_open_confirm_maxsz \
182 (op_encode_hdr_maxsz + \
183 encode_stateid_maxsz + 1)
184#define decode_open_confirm_maxsz \
185 (op_decode_hdr_maxsz + \
186 decode_stateid_maxsz)
187#define encode_open_downgrade_maxsz \
188 (op_encode_hdr_maxsz + \
189 encode_stateid_maxsz + 1 + \
190 encode_share_access_maxsz)
191#define decode_open_downgrade_maxsz \
192 (op_decode_hdr_maxsz + \
193 decode_stateid_maxsz)
194#define encode_close_maxsz (op_encode_hdr_maxsz + \
195 1 + encode_stateid_maxsz)
196#define decode_close_maxsz (op_decode_hdr_maxsz + \
197 decode_stateid_maxsz)
198#define encode_setattr_maxsz (op_encode_hdr_maxsz + \
199 encode_stateid_maxsz + \
200 encode_attrs_maxsz)
201#define decode_setattr_maxsz (op_decode_hdr_maxsz + \
202 nfs4_fattr_bitmap_maxsz)
203#define encode_read_maxsz (op_encode_hdr_maxsz + \
204 encode_stateid_maxsz + 3)
205#define decode_read_maxsz (op_decode_hdr_maxsz + 2)
206#define encode_readdir_maxsz (op_encode_hdr_maxsz + \
207 2 + encode_verifier_maxsz + 5 + \
208 nfs4_label_maxsz)
209#define decode_readdir_maxsz (op_decode_hdr_maxsz + \
210 decode_verifier_maxsz)
211#define encode_readlink_maxsz (op_encode_hdr_maxsz)
212#define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
213#define encode_write_maxsz (op_encode_hdr_maxsz + \
214 encode_stateid_maxsz + 4)
215#define decode_write_maxsz (op_decode_hdr_maxsz + \
216 2 + decode_verifier_maxsz)
217#define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
218#define decode_commit_maxsz (op_decode_hdr_maxsz + \
219 decode_verifier_maxsz)
220#define encode_remove_maxsz (op_encode_hdr_maxsz + \
221 nfs4_name_maxsz)
222#define decode_remove_maxsz (op_decode_hdr_maxsz + \
223 decode_change_info_maxsz)
224#define encode_rename_maxsz (op_encode_hdr_maxsz + \
225 2 * nfs4_name_maxsz)
226#define decode_rename_maxsz (op_decode_hdr_maxsz + \
227 decode_change_info_maxsz + \
228 decode_change_info_maxsz)
229#define encode_link_maxsz (op_encode_hdr_maxsz + \
230 nfs4_name_maxsz)
231#define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
232#define encode_lockowner_maxsz (7)
233#define encode_lock_maxsz (op_encode_hdr_maxsz + \
234 7 + \
235 1 + encode_stateid_maxsz + 1 + \
236 encode_lockowner_maxsz)
237#define decode_lock_denied_maxsz \
238 (8 + decode_lockowner_maxsz)
239#define decode_lock_maxsz (op_decode_hdr_maxsz + \
240 decode_lock_denied_maxsz)
241#define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
242 encode_lockowner_maxsz)
243#define decode_lockt_maxsz (op_decode_hdr_maxsz + \
244 decode_lock_denied_maxsz)
245#define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
246 encode_stateid_maxsz + \
247 4)
248#define decode_locku_maxsz (op_decode_hdr_maxsz + \
249 decode_stateid_maxsz)
250#define encode_release_lockowner_maxsz \
251 (op_encode_hdr_maxsz + \
252 encode_lockowner_maxsz)
253#define decode_release_lockowner_maxsz \
254 (op_decode_hdr_maxsz)
255#define encode_access_maxsz (op_encode_hdr_maxsz + 1)
256#define decode_access_maxsz (op_decode_hdr_maxsz + 2)
257#define encode_symlink_maxsz (op_encode_hdr_maxsz + \
258 1 + nfs4_name_maxsz + \
259 1 + \
260 nfs4_fattr_maxsz)
261#define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
262#define encode_create_maxsz (op_encode_hdr_maxsz + \
263 1 + 2 + nfs4_name_maxsz + \
264 encode_attrs_maxsz)
265#define decode_create_maxsz (op_decode_hdr_maxsz + \
266 decode_change_info_maxsz + \
267 nfs4_fattr_bitmap_maxsz)
268#define encode_statfs_maxsz (encode_getattr_maxsz)
269#define decode_statfs_maxsz (decode_getattr_maxsz)
270#define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
271#define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
272#define encode_getacl_maxsz (encode_getattr_maxsz)
273#define decode_getacl_maxsz (op_decode_hdr_maxsz + \
274 nfs4_fattr_bitmap_maxsz + 1)
275#define encode_setacl_maxsz (op_encode_hdr_maxsz + \
276 encode_stateid_maxsz + 3)
277#define decode_setacl_maxsz (decode_setattr_maxsz)
278#define encode_fs_locations_maxsz \
279 (encode_getattr_maxsz)
280#define decode_fs_locations_maxsz \
281 (0)
282#define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
283#define decode_secinfo_maxsz (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
284
285#if defined(CONFIG_NFS_V4_1)
286#define NFS4_MAX_MACHINE_NAME_LEN (64)
287#define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
288 sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
289
290#define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
291 encode_verifier_maxsz + \
292 1 /* co_ownerid.len */ + \
293 /* eia_clientowner */ \
294 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
295 1 /* flags */ + \
296 1 /* spa_how */ + \
297 /* max is SP4_MACH_CRED (for now) */ + \
298 1 + NFS4_OP_MAP_NUM_WORDS + \
299 1 + NFS4_OP_MAP_NUM_WORDS + \
300 1 /* implementation id array of size 1 */ + \
301 1 /* nii_domain */ + \
302 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
303 1 /* nii_name */ + \
304 XDR_QUADLEN(IMPL_NAME_LIMIT) + \
305 3 /* nii_date */)
306#define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
307 2 /* eir_clientid */ + \
308 1 /* eir_sequenceid */ + \
309 1 /* eir_flags */ + \
310 1 /* spr_how */ + \
311 /* max is SP4_MACH_CRED (for now) */ + \
312 1 + NFS4_OP_MAP_NUM_WORDS + \
313 1 + NFS4_OP_MAP_NUM_WORDS + \
314 2 /* eir_server_owner.so_minor_id */ + \
315 /* eir_server_owner.so_major_id<> */ \
316 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
317 /* eir_server_scope<> */ \
318 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
319 1 /* eir_server_impl_id array length */ + \
320 1 /* nii_domain */ + \
321 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
322 1 /* nii_name */ + \
323 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
324 3 /* nii_date */)
325#define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
326#define decode_channel_attrs_maxsz (6 + \
327 1 /* ca_rdma_ird.len */ + \
328 1 /* ca_rdma_ird */)
329#define encode_create_session_maxsz (op_encode_hdr_maxsz + \
330 2 /* csa_clientid */ + \
331 1 /* csa_sequence */ + \
332 1 /* csa_flags */ + \
333 encode_channel_attrs_maxsz + \
334 encode_channel_attrs_maxsz + \
335 1 /* csa_cb_program */ + \
336 1 /* csa_sec_parms.len (1) */ + \
337 1 /* cb_secflavor (AUTH_SYS) */ + \
338 1 /* stamp */ + \
339 1 /* machinename.len */ + \
340 XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
341 1 /* uid */ + \
342 1 /* gid */ + \
343 1 /* gids.len (0) */)
344#define decode_create_session_maxsz (op_decode_hdr_maxsz + \
345 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
346 1 /* csr_sequence */ + \
347 1 /* csr_flags */ + \
348 decode_channel_attrs_maxsz + \
349 decode_channel_attrs_maxsz)
350#define encode_bind_conn_to_session_maxsz (op_encode_hdr_maxsz + \
351 /* bctsa_sessid */ \
352 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
353 1 /* bctsa_dir */ + \
354 1 /* bctsa_use_conn_in_rdma_mode */)
355#define decode_bind_conn_to_session_maxsz (op_decode_hdr_maxsz + \
356 /* bctsr_sessid */ \
357 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
358 1 /* bctsr_dir */ + \
359 1 /* bctsr_use_conn_in_rdma_mode */)
360#define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
361#define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
362#define encode_destroy_clientid_maxsz (op_encode_hdr_maxsz + 2)
363#define decode_destroy_clientid_maxsz (op_decode_hdr_maxsz)
364#define encode_sequence_maxsz (op_encode_hdr_maxsz + \
365 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
366#define decode_sequence_maxsz (op_decode_hdr_maxsz + \
367 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
368#define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
369#define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
370#define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
371 XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
372 1 /* layout type */ + \
373 1 /* maxcount */ + \
374 1 /* bitmap size */ + \
375 1 /* notification bitmap length */ + \
376 1 /* notification bitmap, word 0 */)
377#define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
378 1 /* layout type */ + \
379 1 /* opaque devaddr4 length */ + \
380 /* devaddr4 payload is read into page */ \
381 1 /* notification bitmap length */ + \
382 1 /* notification bitmap, word 0 */)
383#define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
384 encode_stateid_maxsz)
385#define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
386 decode_stateid_maxsz + \
387 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
388#define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
389 2 /* offset */ + \
390 2 /* length */ + \
391 1 /* reclaim */ + \
392 encode_stateid_maxsz + \
393 1 /* new offset (true) */ + \
394 2 /* last byte written */ + \
395 1 /* nt_timechanged (false) */ + \
396 1 /* layoutupdate4 layout type */ + \
397 1 /* layoutupdate4 opaqueue len */)
398 /* the actual content of layoutupdate4 should
399 be allocated by drivers and spliced in
400 using xdr_write_pages */
401#define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
402#define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
403 encode_stateid_maxsz + \
404 1 + \
405 XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
406#define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
407 1 + decode_stateid_maxsz)
408#define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
409#define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
410#define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \
411 XDR_QUADLEN(NFS4_STATEID_SIZE))
412#define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1)
413#define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \
414 XDR_QUADLEN(NFS4_STATEID_SIZE))
415#define decode_free_stateid_maxsz (op_decode_hdr_maxsz)
416#else /* CONFIG_NFS_V4_1 */
417#define encode_sequence_maxsz 0
418#define decode_sequence_maxsz 0
419#define encode_layoutreturn_maxsz 0
420#define decode_layoutreturn_maxsz 0
421#endif /* CONFIG_NFS_V4_1 */
422
423#define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
424#define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
425#define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
426 encode_sequence_maxsz + \
427 encode_putfh_maxsz + \
428 encode_read_maxsz)
429#define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
430 decode_sequence_maxsz + \
431 decode_putfh_maxsz + \
432 decode_read_maxsz)
433#define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
434 encode_sequence_maxsz + \
435 encode_putfh_maxsz + \
436 encode_readlink_maxsz)
437#define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
438 decode_sequence_maxsz + \
439 decode_putfh_maxsz + \
440 decode_readlink_maxsz)
441#define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
442 encode_sequence_maxsz + \
443 encode_putfh_maxsz + \
444 encode_readdir_maxsz)
445#define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
446 decode_sequence_maxsz + \
447 decode_putfh_maxsz + \
448 decode_readdir_maxsz)
449#define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
450 encode_sequence_maxsz + \
451 encode_putfh_maxsz + \
452 encode_write_maxsz + \
453 encode_getattr_maxsz)
454#define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
455 decode_sequence_maxsz + \
456 decode_putfh_maxsz + \
457 decode_write_maxsz + \
458 decode_getattr_maxsz)
459#define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
460 encode_sequence_maxsz + \
461 encode_putfh_maxsz + \
462 encode_commit_maxsz)
463#define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
464 decode_sequence_maxsz + \
465 decode_putfh_maxsz + \
466 decode_commit_maxsz)
467#define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
468 encode_sequence_maxsz + \
469 encode_putfh_maxsz + \
470 encode_open_maxsz + \
471 encode_access_maxsz + \
472 encode_getfh_maxsz + \
473 encode_getattr_maxsz)
474#define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
475 decode_sequence_maxsz + \
476 decode_putfh_maxsz + \
477 decode_open_maxsz + \
478 decode_access_maxsz + \
479 decode_getfh_maxsz + \
480 decode_getattr_maxsz)
481#define NFS4_enc_open_confirm_sz \
482 (compound_encode_hdr_maxsz + \
483 encode_putfh_maxsz + \
484 encode_open_confirm_maxsz)
485#define NFS4_dec_open_confirm_sz \
486 (compound_decode_hdr_maxsz + \
487 decode_putfh_maxsz + \
488 decode_open_confirm_maxsz)
489#define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
490 encode_sequence_maxsz + \
491 encode_putfh_maxsz + \
492 encode_open_maxsz + \
493 encode_access_maxsz + \
494 encode_getattr_maxsz)
495#define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
496 decode_sequence_maxsz + \
497 decode_putfh_maxsz + \
498 decode_open_maxsz + \
499 decode_access_maxsz + \
500 decode_getattr_maxsz)
501#define NFS4_enc_open_downgrade_sz \
502 (compound_encode_hdr_maxsz + \
503 encode_sequence_maxsz + \
504 encode_putfh_maxsz + \
505 encode_layoutreturn_maxsz + \
506 encode_open_downgrade_maxsz)
507#define NFS4_dec_open_downgrade_sz \
508 (compound_decode_hdr_maxsz + \
509 decode_sequence_maxsz + \
510 decode_putfh_maxsz + \
511 decode_layoutreturn_maxsz + \
512 decode_open_downgrade_maxsz)
513#define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
514 encode_sequence_maxsz + \
515 encode_putfh_maxsz + \
516 encode_layoutreturn_maxsz + \
517 encode_close_maxsz + \
518 encode_getattr_maxsz)
519#define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
520 decode_sequence_maxsz + \
521 decode_putfh_maxsz + \
522 decode_layoutreturn_maxsz + \
523 decode_close_maxsz + \
524 decode_getattr_maxsz)
525#define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
526 encode_sequence_maxsz + \
527 encode_putfh_maxsz + \
528 encode_setattr_maxsz + \
529 encode_getattr_maxsz)
530#define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
531 decode_sequence_maxsz + \
532 decode_putfh_maxsz + \
533 decode_setattr_maxsz + \
534 decode_getattr_maxsz)
535#define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
536 encode_sequence_maxsz + \
537 encode_putfh_maxsz + \
538 encode_fsinfo_maxsz)
539#define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
540 decode_sequence_maxsz + \
541 decode_putfh_maxsz + \
542 decode_fsinfo_maxsz)
543#define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
544 encode_renew_maxsz)
545#define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
546 decode_renew_maxsz)
547#define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
548 encode_setclientid_maxsz)
549#define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
550 decode_setclientid_maxsz)
551#define NFS4_enc_setclientid_confirm_sz \
552 (compound_encode_hdr_maxsz + \
553 encode_setclientid_confirm_maxsz)
554#define NFS4_dec_setclientid_confirm_sz \
555 (compound_decode_hdr_maxsz + \
556 decode_setclientid_confirm_maxsz)
557#define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
558 encode_sequence_maxsz + \
559 encode_putfh_maxsz + \
560 encode_lock_maxsz)
561#define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
562 decode_sequence_maxsz + \
563 decode_putfh_maxsz + \
564 decode_lock_maxsz)
565#define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
566 encode_sequence_maxsz + \
567 encode_putfh_maxsz + \
568 encode_lockt_maxsz)
569#define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
570 decode_sequence_maxsz + \
571 decode_putfh_maxsz + \
572 decode_lockt_maxsz)
573#define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
574 encode_sequence_maxsz + \
575 encode_putfh_maxsz + \
576 encode_locku_maxsz)
577#define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
578 decode_sequence_maxsz + \
579 decode_putfh_maxsz + \
580 decode_locku_maxsz)
581#define NFS4_enc_release_lockowner_sz \
582 (compound_encode_hdr_maxsz + \
583 encode_lockowner_maxsz)
584#define NFS4_dec_release_lockowner_sz \
585 (compound_decode_hdr_maxsz + \
586 decode_lockowner_maxsz)
587#define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
588 encode_sequence_maxsz + \
589 encode_putfh_maxsz + \
590 encode_access_maxsz + \
591 encode_getattr_maxsz)
592#define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
593 decode_sequence_maxsz + \
594 decode_putfh_maxsz + \
595 decode_access_maxsz + \
596 decode_getattr_maxsz)
597#define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
598 encode_sequence_maxsz + \
599 encode_putfh_maxsz + \
600 encode_getattr_maxsz + \
601 encode_renew_maxsz)
602#define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
603 decode_sequence_maxsz + \
604 decode_putfh_maxsz + \
605 decode_getattr_maxsz + \
606 decode_renew_maxsz)
607#define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
608 encode_sequence_maxsz + \
609 encode_putfh_maxsz + \
610 encode_lookup_maxsz + \
611 encode_getattr_maxsz + \
612 encode_getfh_maxsz)
613#define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
614 decode_sequence_maxsz + \
615 decode_putfh_maxsz + \
616 decode_lookup_maxsz + \
617 decode_getattr_maxsz + \
618 decode_getfh_maxsz)
619#define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
620 encode_sequence_maxsz + \
621 encode_putrootfh_maxsz + \
622 encode_getattr_maxsz + \
623 encode_getfh_maxsz)
624#define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
625 decode_sequence_maxsz + \
626 decode_putrootfh_maxsz + \
627 decode_getattr_maxsz + \
628 decode_getfh_maxsz)
629#define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
630 encode_sequence_maxsz + \
631 encode_putfh_maxsz + \
632 encode_remove_maxsz)
633#define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
634 decode_sequence_maxsz + \
635 decode_putfh_maxsz + \
636 decode_remove_maxsz)
637#define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
638 encode_sequence_maxsz + \
639 encode_putfh_maxsz + \
640 encode_savefh_maxsz + \
641 encode_putfh_maxsz + \
642 encode_rename_maxsz)
643#define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
644 decode_sequence_maxsz + \
645 decode_putfh_maxsz + \
646 decode_savefh_maxsz + \
647 decode_putfh_maxsz + \
648 decode_rename_maxsz)
649#define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
650 encode_sequence_maxsz + \
651 encode_putfh_maxsz + \
652 encode_savefh_maxsz + \
653 encode_putfh_maxsz + \
654 encode_link_maxsz + \
655 encode_restorefh_maxsz + \
656 encode_getattr_maxsz)
657#define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
658 decode_sequence_maxsz + \
659 decode_putfh_maxsz + \
660 decode_savefh_maxsz + \
661 decode_putfh_maxsz + \
662 decode_link_maxsz + \
663 decode_restorefh_maxsz + \
664 decode_getattr_maxsz)
665#define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
666 encode_sequence_maxsz + \
667 encode_putfh_maxsz + \
668 encode_symlink_maxsz + \
669 encode_getattr_maxsz + \
670 encode_getfh_maxsz)
671#define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
672 decode_sequence_maxsz + \
673 decode_putfh_maxsz + \
674 decode_symlink_maxsz + \
675 decode_getattr_maxsz + \
676 decode_getfh_maxsz)
677#define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
678 encode_sequence_maxsz + \
679 encode_putfh_maxsz + \
680 encode_create_maxsz + \
681 encode_getfh_maxsz + \
682 encode_getattr_maxsz)
683#define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
684 decode_sequence_maxsz + \
685 decode_putfh_maxsz + \
686 decode_create_maxsz + \
687 decode_getfh_maxsz + \
688 decode_getattr_maxsz)
689#define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
690 encode_sequence_maxsz + \
691 encode_putfh_maxsz + \
692 encode_getattr_maxsz)
693#define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
694 decode_sequence_maxsz + \
695 decode_putfh_maxsz + \
696 decode_getattr_maxsz)
697#define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
698 encode_sequence_maxsz + \
699 encode_putfh_maxsz + \
700 encode_statfs_maxsz)
701#define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
702 decode_sequence_maxsz + \
703 decode_putfh_maxsz + \
704 decode_statfs_maxsz)
705#define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
706 encode_sequence_maxsz + \
707 encode_putfh_maxsz + \
708 encode_getattr_maxsz)
709#define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
710 decode_sequence_maxsz + \
711 decode_putfh_maxsz + \
712 decode_getattr_maxsz)
713#define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
714 encode_sequence_maxsz + \
715 encode_putfh_maxsz + \
716 encode_layoutreturn_maxsz + \
717 encode_delegreturn_maxsz + \
718 encode_getattr_maxsz)
719#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
720 decode_sequence_maxsz + \
721 decode_putfh_maxsz + \
722 decode_layoutreturn_maxsz + \
723 decode_delegreturn_maxsz + \
724 decode_getattr_maxsz)
725#define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
726 encode_sequence_maxsz + \
727 encode_putfh_maxsz + \
728 encode_getacl_maxsz)
729#define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
730 decode_sequence_maxsz + \
731 decode_putfh_maxsz + \
732 decode_getacl_maxsz)
733#define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
734 encode_sequence_maxsz + \
735 encode_putfh_maxsz + \
736 encode_setacl_maxsz)
737#define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
738 decode_sequence_maxsz + \
739 decode_putfh_maxsz + \
740 decode_setacl_maxsz)
741#define NFS4_enc_fs_locations_sz \
742 (compound_encode_hdr_maxsz + \
743 encode_sequence_maxsz + \
744 encode_putfh_maxsz + \
745 encode_lookup_maxsz + \
746 encode_fs_locations_maxsz + \
747 encode_renew_maxsz)
748#define NFS4_dec_fs_locations_sz \
749 (compound_decode_hdr_maxsz + \
750 decode_sequence_maxsz + \
751 decode_putfh_maxsz + \
752 decode_lookup_maxsz + \
753 decode_fs_locations_maxsz + \
754 decode_renew_maxsz)
755#define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
756 encode_sequence_maxsz + \
757 encode_putfh_maxsz + \
758 encode_secinfo_maxsz)
759#define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
760 decode_sequence_maxsz + \
761 decode_putfh_maxsz + \
762 decode_secinfo_maxsz)
763#define NFS4_enc_fsid_present_sz \
764 (compound_encode_hdr_maxsz + \
765 encode_sequence_maxsz + \
766 encode_putfh_maxsz + \
767 encode_getfh_maxsz + \
768 encode_renew_maxsz)
769#define NFS4_dec_fsid_present_sz \
770 (compound_decode_hdr_maxsz + \
771 decode_sequence_maxsz + \
772 decode_putfh_maxsz + \
773 decode_getfh_maxsz + \
774 decode_renew_maxsz)
775#if defined(CONFIG_NFS_V4_1)
776#define NFS4_enc_bind_conn_to_session_sz \
777 (compound_encode_hdr_maxsz + \
778 encode_bind_conn_to_session_maxsz)
779#define NFS4_dec_bind_conn_to_session_sz \
780 (compound_decode_hdr_maxsz + \
781 decode_bind_conn_to_session_maxsz)
782#define NFS4_enc_exchange_id_sz \
783 (compound_encode_hdr_maxsz + \
784 encode_exchange_id_maxsz)
785#define NFS4_dec_exchange_id_sz \
786 (compound_decode_hdr_maxsz + \
787 decode_exchange_id_maxsz)
788#define NFS4_enc_create_session_sz \
789 (compound_encode_hdr_maxsz + \
790 encode_create_session_maxsz)
791#define NFS4_dec_create_session_sz \
792 (compound_decode_hdr_maxsz + \
793 decode_create_session_maxsz)
794#define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
795 encode_destroy_session_maxsz)
796#define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
797 decode_destroy_session_maxsz)
798#define NFS4_enc_destroy_clientid_sz (compound_encode_hdr_maxsz + \
799 encode_destroy_clientid_maxsz)
800#define NFS4_dec_destroy_clientid_sz (compound_decode_hdr_maxsz + \
801 decode_destroy_clientid_maxsz)
802#define NFS4_enc_sequence_sz \
803 (compound_decode_hdr_maxsz + \
804 encode_sequence_maxsz)
805#define NFS4_dec_sequence_sz \
806 (compound_decode_hdr_maxsz + \
807 decode_sequence_maxsz)
808#define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
809 encode_sequence_maxsz + \
810 encode_putrootfh_maxsz + \
811 encode_fsinfo_maxsz)
812#define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
813 decode_sequence_maxsz + \
814 decode_putrootfh_maxsz + \
815 decode_fsinfo_maxsz)
816#define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
817 encode_sequence_maxsz + \
818 encode_reclaim_complete_maxsz)
819#define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
820 decode_sequence_maxsz + \
821 decode_reclaim_complete_maxsz)
822#define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
823 encode_sequence_maxsz +\
824 encode_getdeviceinfo_maxsz)
825#define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
826 decode_sequence_maxsz + \
827 decode_getdeviceinfo_maxsz)
828#define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
829 encode_sequence_maxsz + \
830 encode_putfh_maxsz + \
831 encode_layoutget_maxsz)
832#define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
833 decode_sequence_maxsz + \
834 decode_putfh_maxsz + \
835 decode_layoutget_maxsz)
836#define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
837 encode_sequence_maxsz +\
838 encode_putfh_maxsz + \
839 encode_layoutcommit_maxsz + \
840 encode_getattr_maxsz)
841#define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
842 decode_sequence_maxsz + \
843 decode_putfh_maxsz + \
844 decode_layoutcommit_maxsz + \
845 decode_getattr_maxsz)
846#define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
847 encode_sequence_maxsz + \
848 encode_putfh_maxsz + \
849 encode_layoutreturn_maxsz)
850#define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
851 decode_sequence_maxsz + \
852 decode_putfh_maxsz + \
853 decode_layoutreturn_maxsz)
854#define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
855 encode_sequence_maxsz + \
856 encode_putrootfh_maxsz +\
857 encode_secinfo_no_name_maxsz)
858#define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
859 decode_sequence_maxsz + \
860 decode_putrootfh_maxsz + \
861 decode_secinfo_no_name_maxsz)
862#define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
863 encode_sequence_maxsz + \
864 encode_test_stateid_maxsz)
865#define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
866 decode_sequence_maxsz + \
867 decode_test_stateid_maxsz)
868#define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \
869 encode_sequence_maxsz + \
870 encode_free_stateid_maxsz)
871#define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
872 decode_sequence_maxsz + \
873 decode_free_stateid_maxsz)
874
875const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
876 compound_encode_hdr_maxsz +
877 encode_sequence_maxsz +
878 encode_putfh_maxsz +
879 encode_getattr_maxsz) *
880 XDR_UNIT);
881
882const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
883 compound_decode_hdr_maxsz +
884 decode_sequence_maxsz +
885 decode_putfh_maxsz) *
886 XDR_UNIT);
887
888const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
889 compound_decode_hdr_maxsz +
890 decode_sequence_maxsz) *
891 XDR_UNIT);
892EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
893#endif /* CONFIG_NFS_V4_1 */
894
895static const umode_t nfs_type2fmt[] = {
896 [NF4BAD] = 0,
897 [NF4REG] = S_IFREG,
898 [NF4DIR] = S_IFDIR,
899 [NF4BLK] = S_IFBLK,
900 [NF4CHR] = S_IFCHR,
901 [NF4LNK] = S_IFLNK,
902 [NF4SOCK] = S_IFSOCK,
903 [NF4FIFO] = S_IFIFO,
904 [NF4ATTRDIR] = 0,
905 [NF4NAMEDATTR] = 0,
906};
907
908struct compound_hdr {
909 int32_t status;
910 uint32_t nops;
911 __be32 * nops_p;
912 uint32_t taglen;
913 char * tag;
914 uint32_t replen; /* expected reply words */
915 u32 minorversion;
916};
917
918static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
919{
920 __be32 *p = xdr_reserve_space(xdr, nbytes);
921 BUG_ON(!p);
922 return p;
923}
924
925static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
926{
927 __be32 *p;
928
929 p = xdr_reserve_space(xdr, len);
930 xdr_encode_opaque_fixed(p, buf, len);
931}
932
933static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
934{
935 __be32 *p;
936
937 p = reserve_space(xdr, 4 + len);
938 xdr_encode_opaque(p, str, len);
939}
940
941static void encode_uint32(struct xdr_stream *xdr, u32 n)
942{
943 __be32 *p;
944
945 p = reserve_space(xdr, 4);
946 *p = cpu_to_be32(n);
947}
948
949static void encode_uint64(struct xdr_stream *xdr, u64 n)
950{
951 __be32 *p;
952
953 p = reserve_space(xdr, 8);
954 xdr_encode_hyper(p, n);
955}
956
957static void encode_nfs4_seqid(struct xdr_stream *xdr,
958 const struct nfs_seqid *seqid)
959{
960 if (seqid != NULL)
961 encode_uint32(xdr, seqid->sequence->counter);
962 else
963 encode_uint32(xdr, 0);
964}
965
966static void encode_compound_hdr(struct xdr_stream *xdr,
967 struct rpc_rqst *req,
968 struct compound_hdr *hdr)
969{
970 __be32 *p;
971 struct rpc_auth *auth = req->rq_cred->cr_auth;
972
973 /* initialize running count of expected bytes in reply.
974 * NOTE: the replied tag SHOULD be the same is the one sent,
975 * but this is not required as a MUST for the server to do so. */
976 hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
977
978 WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
979 encode_string(xdr, hdr->taglen, hdr->tag);
980 p = reserve_space(xdr, 8);
981 *p++ = cpu_to_be32(hdr->minorversion);
982 hdr->nops_p = p;
983 *p = cpu_to_be32(hdr->nops);
984}
985
986static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
987 uint32_t replen,
988 struct compound_hdr *hdr)
989{
990 encode_uint32(xdr, op);
991 hdr->nops++;
992 hdr->replen += replen;
993}
994
995static void encode_nops(struct compound_hdr *hdr)
996{
997 WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
998 *hdr->nops_p = htonl(hdr->nops);
999}
1000
1001static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1002{
1003 encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
1004}
1005
1006static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
1007{
1008 encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
1009}
1010
1011static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
1012 const struct nfs4_label *label,
1013 const struct nfs_server *server,
1014 bool excl_check, const umode_t *umask)
1015{
1016 char owner_name[IDMAP_NAMESZ];
1017 char owner_group[IDMAP_NAMESZ];
1018 int owner_namelen = 0;
1019 int owner_grouplen = 0;
1020 __be32 *p;
1021 unsigned i;
1022 uint32_t len = 0;
1023 uint32_t bmval_len;
1024 uint32_t bmval[3] = { 0 };
1025
1026 /*
1027 * We reserve enough space to write the entire attribute buffer at once.
1028 */
1029 if (iap->ia_valid & ATTR_SIZE) {
1030 bmval[0] |= FATTR4_WORD0_SIZE;
1031 len += 8;
1032 }
1033 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
1034 umask = NULL;
1035 if (iap->ia_valid & ATTR_MODE) {
1036 if (umask) {
1037 bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1038 len += 8;
1039 } else {
1040 bmval[1] |= FATTR4_WORD1_MODE;
1041 len += 4;
1042 }
1043 }
1044 if (iap->ia_valid & ATTR_UID) {
1045 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1046 if (owner_namelen < 0) {
1047 dprintk("nfs: couldn't resolve uid %d to string\n",
1048 from_kuid(&init_user_ns, iap->ia_uid));
1049 /* XXX */
1050 strcpy(owner_name, "nobody");
1051 owner_namelen = sizeof("nobody") - 1;
1052 /* goto out; */
1053 }
1054 bmval[1] |= FATTR4_WORD1_OWNER;
1055 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1056 }
1057 if (iap->ia_valid & ATTR_GID) {
1058 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1059 if (owner_grouplen < 0) {
1060 dprintk("nfs: couldn't resolve gid %d to string\n",
1061 from_kgid(&init_user_ns, iap->ia_gid));
1062 strcpy(owner_group, "nobody");
1063 owner_grouplen = sizeof("nobody") - 1;
1064 /* goto out; */
1065 }
1066 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1067 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1068 }
1069 if (iap->ia_valid & ATTR_ATIME_SET) {
1070 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1071 len += 16;
1072 } else if (iap->ia_valid & ATTR_ATIME) {
1073 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1074 len += 4;
1075 }
1076 if (iap->ia_valid & ATTR_MTIME_SET) {
1077 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1078 len += 16;
1079 } else if (iap->ia_valid & ATTR_MTIME) {
1080 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1081 len += 4;
1082 }
1083
1084 if (excl_check) {
1085 const u32 *excl_bmval = server->exclcreat_bitmask;
1086 bmval[0] &= excl_bmval[0];
1087 bmval[1] &= excl_bmval[1];
1088 bmval[2] &= excl_bmval[2];
1089
1090 if (!(excl_bmval[2] & FATTR4_WORD2_SECURITY_LABEL))
1091 label = NULL;
1092 }
1093
1094 if (label) {
1095 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1096 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1097 }
1098
1099 if (bmval[2] != 0)
1100 bmval_len = 3;
1101 else if (bmval[1] != 0)
1102 bmval_len = 2;
1103 else
1104 bmval_len = 1;
1105
1106 p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
1107
1108 *p++ = cpu_to_be32(bmval_len);
1109 for (i = 0; i < bmval_len; i++)
1110 *p++ = cpu_to_be32(bmval[i]);
1111 *p++ = cpu_to_be32(len);
1112
1113 if (bmval[0] & FATTR4_WORD0_SIZE)
1114 p = xdr_encode_hyper(p, iap->ia_size);
1115 if (bmval[1] & FATTR4_WORD1_MODE)
1116 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1117 if (bmval[1] & FATTR4_WORD1_OWNER)
1118 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1119 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1120 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1121 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1122 if (iap->ia_valid & ATTR_ATIME_SET) {
1123 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1124 p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
1125 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
1126 } else
1127 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1128 }
1129 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1130 if (iap->ia_valid & ATTR_MTIME_SET) {
1131 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1132 p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
1133 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
1134 } else
1135 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1136 }
1137 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
1138 *p++ = cpu_to_be32(label->lfs);
1139 *p++ = cpu_to_be32(label->pi);
1140 *p++ = cpu_to_be32(label->len);
1141 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1142 }
1143 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1144 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1145 *p++ = cpu_to_be32(*umask);
1146 }
1147
1148/* out: */
1149}
1150
1151static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1152{
1153 encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1154 encode_uint32(xdr, access);
1155}
1156
1157static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1158{
1159 encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1160 encode_nfs4_seqid(xdr, arg->seqid);
1161 encode_nfs4_stateid(xdr, &arg->stateid);
1162}
1163
1164static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1165{
1166 __be32 *p;
1167
1168 encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1169 p = reserve_space(xdr, 12);
1170 p = xdr_encode_hyper(p, args->offset);
1171 *p = cpu_to_be32(args->count);
1172}
1173
1174static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1175{
1176 __be32 *p;
1177
1178 encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1179 encode_uint32(xdr, create->ftype);
1180
1181 switch (create->ftype) {
1182 case NF4LNK:
1183 p = reserve_space(xdr, 4);
1184 *p = cpu_to_be32(create->u.symlink.len);
1185 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1186 create->u.symlink.len);
1187 xdr->buf->flags |= XDRBUF_WRITE;
1188 break;
1189
1190 case NF4BLK: case NF4CHR:
1191 p = reserve_space(xdr, 8);
1192 *p++ = cpu_to_be32(create->u.device.specdata1);
1193 *p = cpu_to_be32(create->u.device.specdata2);
1194 break;
1195
1196 default:
1197 break;
1198 }
1199
1200 encode_string(xdr, create->name->len, create->name->name);
1201 encode_attrs(xdr, create->attrs, create->label, create->server, false,
1202 &create->umask);
1203}
1204
1205static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1206{
1207 __be32 *p;
1208
1209 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1210 p = reserve_space(xdr, 8);
1211 *p++ = cpu_to_be32(1);
1212 *p = cpu_to_be32(bitmap);
1213}
1214
1215static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1216{
1217 __be32 *p;
1218
1219 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1220 p = reserve_space(xdr, 12);
1221 *p++ = cpu_to_be32(2);
1222 *p++ = cpu_to_be32(bm0);
1223 *p = cpu_to_be32(bm1);
1224}
1225
1226static void
1227encode_getattr_three(struct xdr_stream *xdr,
1228 uint32_t bm0, uint32_t bm1, uint32_t bm2,
1229 struct compound_hdr *hdr)
1230{
1231 __be32 *p;
1232
1233 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1234 if (bm2) {
1235 p = reserve_space(xdr, 16);
1236 *p++ = cpu_to_be32(3);
1237 *p++ = cpu_to_be32(bm0);
1238 *p++ = cpu_to_be32(bm1);
1239 *p = cpu_to_be32(bm2);
1240 } else if (bm1) {
1241 p = reserve_space(xdr, 12);
1242 *p++ = cpu_to_be32(2);
1243 *p++ = cpu_to_be32(bm0);
1244 *p = cpu_to_be32(bm1);
1245 } else {
1246 p = reserve_space(xdr, 8);
1247 *p++ = cpu_to_be32(1);
1248 *p = cpu_to_be32(bm0);
1249 }
1250}
1251
1252static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1253{
1254 encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1255 bitmask[1] & nfs4_fattr_bitmap[1],
1256 bitmask[2] & nfs4_fattr_bitmap[2],
1257 hdr);
1258}
1259
1260static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1261 const u32 *open_bitmap,
1262 struct compound_hdr *hdr)
1263{
1264 encode_getattr_three(xdr,
1265 bitmask[0] & open_bitmap[0],
1266 bitmask[1] & open_bitmap[1],
1267 bitmask[2] & open_bitmap[2],
1268 hdr);
1269}
1270
1271static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1272{
1273 encode_getattr_three(xdr,
1274 bitmask[0] & nfs4_fsinfo_bitmap[0],
1275 bitmask[1] & nfs4_fsinfo_bitmap[1],
1276 bitmask[2] & nfs4_fsinfo_bitmap[2],
1277 hdr);
1278}
1279
1280static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1281{
1282 encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1283 bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1284}
1285
1286static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1287{
1288 encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
1289}
1290
1291static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1292{
1293 encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
1294 encode_string(xdr, name->len, name->name);
1295}
1296
1297static inline int nfs4_lock_type(struct file_lock *fl, int block)
1298{
1299 if (fl->fl_type == F_RDLCK)
1300 return block ? NFS4_READW_LT : NFS4_READ_LT;
1301 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1302}
1303
1304static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1305{
1306 if (fl->fl_end == OFFSET_MAX)
1307 return ~(uint64_t)0;
1308 return fl->fl_end - fl->fl_start + 1;
1309}
1310
1311static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1312{
1313 __be32 *p;
1314
1315 p = reserve_space(xdr, 32);
1316 p = xdr_encode_hyper(p, lowner->clientid);
1317 *p++ = cpu_to_be32(20);
1318 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1319 *p++ = cpu_to_be32(lowner->s_dev);
1320 xdr_encode_hyper(p, lowner->id);
1321}
1322
1323/*
1324 * opcode,type,reclaim,offset,length,new_lock_owner = 32
1325 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1326 */
1327static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1328{
1329 __be32 *p;
1330
1331 encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
1332 p = reserve_space(xdr, 28);
1333 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1334 *p++ = cpu_to_be32(args->reclaim);
1335 p = xdr_encode_hyper(p, args->fl->fl_start);
1336 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1337 *p = cpu_to_be32(args->new_lock_owner);
1338 if (args->new_lock_owner){
1339 encode_nfs4_seqid(xdr, args->open_seqid);
1340 encode_nfs4_stateid(xdr, &args->open_stateid);
1341 encode_nfs4_seqid(xdr, args->lock_seqid);
1342 encode_lockowner(xdr, &args->lock_owner);
1343 }
1344 else {
1345 encode_nfs4_stateid(xdr, &args->lock_stateid);
1346 encode_nfs4_seqid(xdr, args->lock_seqid);
1347 }
1348}
1349
1350static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1351{
1352 __be32 *p;
1353
1354 encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
1355 p = reserve_space(xdr, 20);
1356 *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1357 p = xdr_encode_hyper(p, args->fl->fl_start);
1358 p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1359 encode_lockowner(xdr, &args->lock_owner);
1360}
1361
1362static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1363{
1364 __be32 *p;
1365
1366 encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
1367 encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
1368 encode_nfs4_seqid(xdr, args->seqid);
1369 encode_nfs4_stateid(xdr, &args->stateid);
1370 p = reserve_space(xdr, 16);
1371 p = xdr_encode_hyper(p, args->fl->fl_start);
1372 xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1373}
1374
1375static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1376{
1377 encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
1378 encode_lockowner(xdr, lowner);
1379}
1380
1381static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1382{
1383 encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
1384 encode_string(xdr, name->len, name->name);
1385}
1386
1387static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1388{
1389 __be32 *p;
1390
1391 p = reserve_space(xdr, 8);
1392 *p++ = cpu_to_be32(share_access);
1393 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1394}
1395
1396static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1397{
1398 __be32 *p;
1399 /*
1400 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1401 * owner 4 = 32
1402 */
1403 encode_nfs4_seqid(xdr, arg->seqid);
1404 encode_share_access(xdr, arg->share_access);
1405 p = reserve_space(xdr, 36);
1406 p = xdr_encode_hyper(p, arg->clientid);
1407 *p++ = cpu_to_be32(24);
1408 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1409 *p++ = cpu_to_be32(arg->server->s_dev);
1410 *p++ = cpu_to_be32(arg->id.uniquifier);
1411 xdr_encode_hyper(p, arg->id.create_time);
1412}
1413
1414static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1415{
1416 __be32 *p;
1417
1418 p = reserve_space(xdr, 4);
1419 switch(arg->createmode) {
1420 case NFS4_CREATE_UNCHECKED:
1421 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1422 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, false,
1423 &arg->umask);
1424 break;
1425 case NFS4_CREATE_GUARDED:
1426 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1427 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, false,
1428 &arg->umask);
1429 break;
1430 case NFS4_CREATE_EXCLUSIVE:
1431 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1432 encode_nfs4_verifier(xdr, &arg->u.verifier);
1433 break;
1434 case NFS4_CREATE_EXCLUSIVE4_1:
1435 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1436 encode_nfs4_verifier(xdr, &arg->u.verifier);
1437 encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, true,
1438 &arg->umask);
1439 }
1440}
1441
1442static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1443{
1444 __be32 *p;
1445
1446 p = reserve_space(xdr, 4);
1447 switch (arg->open_flags & O_CREAT) {
1448 case 0:
1449 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1450 break;
1451 default:
1452 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1453 encode_createmode(xdr, arg);
1454 }
1455}
1456
1457static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1458{
1459 __be32 *p;
1460
1461 p = reserve_space(xdr, 4);
1462 switch (delegation_type) {
1463 case 0:
1464 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1465 break;
1466 case FMODE_READ:
1467 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1468 break;
1469 case FMODE_WRITE|FMODE_READ:
1470 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1471 break;
1472 default:
1473 BUG();
1474 }
1475}
1476
1477static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1478{
1479 __be32 *p;
1480
1481 p = reserve_space(xdr, 4);
1482 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1483 encode_string(xdr, name->len, name->name);
1484}
1485
1486static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1487{
1488 __be32 *p;
1489
1490 p = reserve_space(xdr, 4);
1491 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1492 encode_delegation_type(xdr, type);
1493}
1494
1495static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1496{
1497 __be32 *p;
1498
1499 p = reserve_space(xdr, 4);
1500 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1501 encode_nfs4_stateid(xdr, stateid);
1502 encode_string(xdr, name->len, name->name);
1503}
1504
1505static inline void encode_claim_fh(struct xdr_stream *xdr)
1506{
1507 __be32 *p;
1508
1509 p = reserve_space(xdr, 4);
1510 *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1511}
1512
1513static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1514{
1515 __be32 *p;
1516
1517 p = reserve_space(xdr, 4);
1518 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1519 encode_nfs4_stateid(xdr, stateid);
1520}
1521
1522static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1523{
1524 encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1525 encode_openhdr(xdr, arg);
1526 encode_opentype(xdr, arg);
1527 switch (arg->claim) {
1528 case NFS4_OPEN_CLAIM_NULL:
1529 encode_claim_null(xdr, arg->name);
1530 break;
1531 case NFS4_OPEN_CLAIM_PREVIOUS:
1532 encode_claim_previous(xdr, arg->u.delegation_type);
1533 break;
1534 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1535 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1536 break;
1537 case NFS4_OPEN_CLAIM_FH:
1538 encode_claim_fh(xdr);
1539 break;
1540 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1541 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1542 break;
1543 default:
1544 BUG();
1545 }
1546}
1547
1548static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1549{
1550 encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1551 encode_nfs4_stateid(xdr, arg->stateid);
1552 encode_nfs4_seqid(xdr, arg->seqid);
1553}
1554
1555static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1556{
1557 encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1558 encode_nfs4_stateid(xdr, &arg->stateid);
1559 encode_nfs4_seqid(xdr, arg->seqid);
1560 encode_share_access(xdr, arg->share_access);
1561}
1562
1563static void
1564encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1565{
1566 encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1567 encode_string(xdr, fh->size, fh->data);
1568}
1569
1570static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1571{
1572 encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1573}
1574
1575static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1576 struct compound_hdr *hdr)
1577{
1578 __be32 *p;
1579
1580 encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1581 encode_nfs4_stateid(xdr, &args->stateid);
1582
1583 p = reserve_space(xdr, 12);
1584 p = xdr_encode_hyper(p, args->offset);
1585 *p = cpu_to_be32(args->count);
1586}
1587
1588static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1589{
1590 uint32_t attrs[3] = {
1591 FATTR4_WORD0_RDATTR_ERROR,
1592 FATTR4_WORD1_MOUNTED_ON_FILEID,
1593 };
1594 uint32_t dircount = readdir->count >> 1;
1595 __be32 *p, verf[2];
1596 uint32_t attrlen = 0;
1597 unsigned int i;
1598
1599 if (readdir->plus) {
1600 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1601 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1602 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1603 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1604 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1605 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1606 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1607 dircount >>= 1;
1608 }
1609 /* Use mounted_on_fileid only if the server supports it */
1610 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1611 attrs[0] |= FATTR4_WORD0_FILEID;
1612 for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1613 attrs[i] &= readdir->bitmask[i];
1614 if (attrs[i] != 0)
1615 attrlen = i+1;
1616 }
1617
1618 encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1619 encode_uint64(xdr, readdir->cookie);
1620 encode_nfs4_verifier(xdr, &readdir->verifier);
1621 p = reserve_space(xdr, 12 + (attrlen << 2));
1622 *p++ = cpu_to_be32(dircount);
1623 *p++ = cpu_to_be32(readdir->count);
1624 *p++ = cpu_to_be32(attrlen);
1625 for (i = 0; i < attrlen; i++)
1626 *p++ = cpu_to_be32(attrs[i]);
1627 memcpy(verf, readdir->verifier.data, sizeof(verf));
1628
1629 dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1630 __func__,
1631 (unsigned long long)readdir->cookie,
1632 verf[0], verf[1],
1633 attrs[0] & readdir->bitmask[0],
1634 attrs[1] & readdir->bitmask[1],
1635 attrs[2] & readdir->bitmask[2]);
1636}
1637
1638static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1639{
1640 encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1641}
1642
1643static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1644{
1645 encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1646 encode_string(xdr, name->len, name->name);
1647}
1648
1649static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1650{
1651 encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1652 encode_string(xdr, oldname->len, oldname->name);
1653 encode_string(xdr, newname->len, newname->name);
1654}
1655
1656static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1657 struct compound_hdr *hdr)
1658{
1659 encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1660 encode_uint64(xdr, clid);
1661}
1662
1663static void
1664encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1665{
1666 encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1667}
1668
1669static void
1670encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1671{
1672 __be32 *p;
1673
1674 encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1675 encode_nfs4_stateid(xdr, &zero_stateid);
1676 p = reserve_space(xdr, 2*4);
1677 *p++ = cpu_to_be32(1);
1678 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1679 p = reserve_space(xdr, 4);
1680 *p = cpu_to_be32(arg->acl_len);
1681 xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1682}
1683
1684static void
1685encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1686{
1687 encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1688}
1689
1690static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1691{
1692 encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1693 encode_nfs4_stateid(xdr, &arg->stateid);
1694 encode_attrs(xdr, arg->iap, arg->label, server, false, NULL);
1695}
1696
1697static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1698{
1699 __be32 *p;
1700
1701 encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1702 encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1703
1704 encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1705 setclientid->sc_clnt->cl_owner_id);
1706 p = reserve_space(xdr, 4);
1707 *p = cpu_to_be32(setclientid->sc_prog);
1708 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1709 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1710 p = reserve_space(xdr, 4);
1711 *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1712}
1713
1714static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1715{
1716 encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1717 decode_setclientid_confirm_maxsz, hdr);
1718 encode_uint64(xdr, arg->clientid);
1719 encode_nfs4_verifier(xdr, &arg->confirm);
1720}
1721
1722static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1723 struct compound_hdr *hdr)
1724{
1725 __be32 *p;
1726
1727 encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1728 encode_nfs4_stateid(xdr, &args->stateid);
1729
1730 p = reserve_space(xdr, 16);
1731 p = xdr_encode_hyper(p, args->offset);
1732 *p++ = cpu_to_be32(args->stable);
1733 *p = cpu_to_be32(args->count);
1734
1735 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1736}
1737
1738static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1739{
1740 encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1741 encode_nfs4_stateid(xdr, stateid);
1742}
1743
1744static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1745{
1746 encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1747 encode_string(xdr, name->len, name->name);
1748}
1749
1750#if defined(CONFIG_NFS_V4_1)
1751/* NFSv4.1 operations */
1752static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1753 struct nfs41_bind_conn_to_session_args *args,
1754 struct compound_hdr *hdr)
1755{
1756 __be32 *p;
1757
1758 encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1759 decode_bind_conn_to_session_maxsz, hdr);
1760 encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1761 p = xdr_reserve_space(xdr, 8);
1762 *p++ = cpu_to_be32(args->dir);
1763 *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1764}
1765
1766static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
1767{
1768 unsigned int i;
1769 encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1770 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1771 encode_uint32(xdr, op_map->u.words[i]);
1772}
1773
1774static void encode_exchange_id(struct xdr_stream *xdr,
1775 struct nfs41_exchange_id_args *args,
1776 struct compound_hdr *hdr)
1777{
1778 __be32 *p;
1779 char impl_name[IMPL_NAME_LIMIT];
1780 int len = 0;
1781
1782 encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1783 encode_nfs4_verifier(xdr, args->verifier);
1784
1785 encode_string(xdr, strlen(args->client->cl_owner_id),
1786 args->client->cl_owner_id);
1787
1788 encode_uint32(xdr, args->flags);
1789 encode_uint32(xdr, args->state_protect.how);
1790
1791 switch (args->state_protect.how) {
1792 case SP4_NONE:
1793 break;
1794 case SP4_MACH_CRED:
1795 encode_op_map(xdr, &args->state_protect.enforce);
1796 encode_op_map(xdr, &args->state_protect.allow);
1797 break;
1798 default:
1799 WARN_ON_ONCE(1);
1800 break;
1801 }
1802
1803 if (send_implementation_id &&
1804 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1805 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1806 <= sizeof(impl_name) + 1)
1807 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1808 utsname()->sysname, utsname()->release,
1809 utsname()->version, utsname()->machine);
1810
1811 if (len > 0) {
1812 encode_uint32(xdr, 1); /* implementation id array length=1 */
1813
1814 encode_string(xdr,
1815 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1816 CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1817 encode_string(xdr, len, impl_name);
1818 /* just send zeros for nii_date - the date is in nii_name */
1819 p = reserve_space(xdr, 12);
1820 p = xdr_encode_hyper(p, 0);
1821 *p = cpu_to_be32(0);
1822 } else
1823 encode_uint32(xdr, 0); /* implementation id array length=0 */
1824}
1825
1826static void encode_create_session(struct xdr_stream *xdr,
1827 struct nfs41_create_session_args *args,
1828 struct compound_hdr *hdr)
1829{
1830 __be32 *p;
1831 struct nfs_client *clp = args->client;
1832 struct rpc_clnt *clnt = clp->cl_rpcclient;
1833 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1834 u32 max_resp_sz_cached;
1835
1836 /*
1837 * Assumes OPEN is the biggest non-idempotent compound.
1838 * 2 is the verifier.
1839 */
1840 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1841 RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1842
1843 encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1844 p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1845 p = xdr_encode_hyper(p, args->clientid);
1846 *p++ = cpu_to_be32(args->seqid); /*Sequence id */
1847 *p++ = cpu_to_be32(args->flags); /*flags */
1848
1849 /* Fore Channel */
1850 *p++ = cpu_to_be32(0); /* header padding size */
1851 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1852 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1853 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1854 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1855 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1856 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1857
1858 /* Back Channel */
1859 *p++ = cpu_to_be32(0); /* header padding size */
1860 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1861 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1862 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1863 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1864 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1865 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1866
1867 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1868 *p++ = cpu_to_be32(1);
1869 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1870
1871 /* authsys_parms rfc1831 */
1872 *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1873 p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1874 *p++ = cpu_to_be32(0); /* UID */
1875 *p++ = cpu_to_be32(0); /* GID */
1876 *p = cpu_to_be32(0); /* No more gids */
1877}
1878
1879static void encode_destroy_session(struct xdr_stream *xdr,
1880 struct nfs4_session *session,
1881 struct compound_hdr *hdr)
1882{
1883 encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1884 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1885}
1886
1887static void encode_destroy_clientid(struct xdr_stream *xdr,
1888 uint64_t clientid,
1889 struct compound_hdr *hdr)
1890{
1891 encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1892 encode_uint64(xdr, clientid);
1893}
1894
1895static void encode_reclaim_complete(struct xdr_stream *xdr,
1896 struct nfs41_reclaim_complete_args *args,
1897 struct compound_hdr *hdr)
1898{
1899 encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1900 encode_uint32(xdr, args->one_fs);
1901}
1902#endif /* CONFIG_NFS_V4_1 */
1903
1904static void encode_sequence(struct xdr_stream *xdr,
1905 const struct nfs4_sequence_args *args,
1906 struct compound_hdr *hdr)
1907{
1908#if defined(CONFIG_NFS_V4_1)
1909 struct nfs4_session *session;
1910 struct nfs4_slot_table *tp;
1911 struct nfs4_slot *slot = args->sa_slot;
1912 __be32 *p;
1913
1914 tp = slot->table;
1915 session = tp->session;
1916 if (!session)
1917 return;
1918
1919 encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1920
1921 /*
1922 * Sessionid + seqid + slotid + max slotid + cache_this
1923 */
1924 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1925 "max_slotid=%d cache_this=%d\n",
1926 __func__,
1927 ((u32 *)session->sess_id.data)[0],
1928 ((u32 *)session->sess_id.data)[1],
1929 ((u32 *)session->sess_id.data)[2],
1930 ((u32 *)session->sess_id.data)[3],
1931 slot->seq_nr, slot->slot_nr,
1932 tp->highest_used_slotid, args->sa_cache_this);
1933 p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1934 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1935 *p++ = cpu_to_be32(slot->seq_nr);
1936 *p++ = cpu_to_be32(slot->slot_nr);
1937 *p++ = cpu_to_be32(tp->highest_used_slotid);
1938 *p = cpu_to_be32(args->sa_cache_this);
1939#endif /* CONFIG_NFS_V4_1 */
1940}
1941
1942#ifdef CONFIG_NFS_V4_1
1943static void
1944encode_getdeviceinfo(struct xdr_stream *xdr,
1945 const struct nfs4_getdeviceinfo_args *args,
1946 struct compound_hdr *hdr)
1947{
1948 __be32 *p;
1949
1950 encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1951 p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1952 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1953 NFS4_DEVICEID4_SIZE);
1954 *p++ = cpu_to_be32(args->pdev->layout_type);
1955 *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */
1956
1957 p = reserve_space(xdr, 4 + 4);
1958 *p++ = cpu_to_be32(1); /* bitmap length */
1959 *p++ = cpu_to_be32(args->notify_types);
1960}
1961
1962static void
1963encode_layoutget(struct xdr_stream *xdr,
1964 const struct nfs4_layoutget_args *args,
1965 struct compound_hdr *hdr)
1966{
1967 __be32 *p;
1968
1969 encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1970 p = reserve_space(xdr, 36);
1971 *p++ = cpu_to_be32(0); /* Signal layout available */
1972 *p++ = cpu_to_be32(args->type);
1973 *p++ = cpu_to_be32(args->range.iomode);
1974 p = xdr_encode_hyper(p, args->range.offset);
1975 p = xdr_encode_hyper(p, args->range.length);
1976 p = xdr_encode_hyper(p, args->minlength);
1977 encode_nfs4_stateid(xdr, &args->stateid);
1978 encode_uint32(xdr, args->maxcount);
1979
1980 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1981 __func__,
1982 args->type,
1983 args->range.iomode,
1984 (unsigned long)args->range.offset,
1985 (unsigned long)args->range.length,
1986 args->maxcount);
1987}
1988
1989static int
1990encode_layoutcommit(struct xdr_stream *xdr,
1991 struct inode *inode,
1992 struct nfs4_layoutcommit_args *args,
1993 struct compound_hdr *hdr)
1994{
1995 __be32 *p;
1996
1997 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1998 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1999
2000 encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2001 p = reserve_space(xdr, 20);
2002 /* Only whole file layouts */
2003 p = xdr_encode_hyper(p, 0); /* offset */
2004 p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
2005 *p = cpu_to_be32(0); /* reclaim */
2006 encode_nfs4_stateid(xdr, &args->stateid);
2007 if (args->lastbytewritten != U64_MAX) {
2008 p = reserve_space(xdr, 20);
2009 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2010 p = xdr_encode_hyper(p, args->lastbytewritten);
2011 } else {
2012 p = reserve_space(xdr, 12);
2013 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2014 }
2015 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2016 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2017
2018 if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) {
2019 NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
2020 NFS_I(inode)->layout, xdr, args);
2021 } else {
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 }
2028
2029 return 0;
2030}
2031
2032static void
2033encode_layoutreturn(struct xdr_stream *xdr,
2034 const struct nfs4_layoutreturn_args *args,
2035 struct compound_hdr *hdr)
2036{
2037 const struct pnfs_layoutdriver_type *lr_ops = NFS_SERVER(args->inode)->pnfs_curr_ld;
2038 __be32 *p;
2039
2040 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2041 p = reserve_space(xdr, 16);
2042 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
2043 *p++ = cpu_to_be32(args->layout_type);
2044 *p++ = cpu_to_be32(args->range.iomode);
2045 *p = cpu_to_be32(RETURN_FILE);
2046 p = reserve_space(xdr, 16);
2047 p = xdr_encode_hyper(p, args->range.offset);
2048 p = xdr_encode_hyper(p, args->range.length);
2049 spin_lock(&args->inode->i_lock);
2050 encode_nfs4_stateid(xdr, &args->stateid);
2051 spin_unlock(&args->inode->i_lock);
2052 if (args->ld_private->ops && args->ld_private->ops->encode)
2053 args->ld_private->ops->encode(xdr, args, args->ld_private);
2054 else if (lr_ops->encode_layoutreturn)
2055 lr_ops->encode_layoutreturn(xdr, args);
2056 else
2057 encode_uint32(xdr, 0);
2058}
2059
2060static int
2061encode_secinfo_no_name(struct xdr_stream *xdr,
2062 const struct nfs41_secinfo_no_name_args *args,
2063 struct compound_hdr *hdr)
2064{
2065 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2066 encode_uint32(xdr, args->style);
2067 return 0;
2068}
2069
2070static void encode_test_stateid(struct xdr_stream *xdr,
2071 struct nfs41_test_stateid_args *args,
2072 struct compound_hdr *hdr)
2073{
2074 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2075 encode_uint32(xdr, 1);
2076 encode_nfs4_stateid(xdr, args->stateid);
2077}
2078
2079static void encode_free_stateid(struct xdr_stream *xdr,
2080 struct nfs41_free_stateid_args *args,
2081 struct compound_hdr *hdr)
2082{
2083 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2084 encode_nfs4_stateid(xdr, &args->stateid);
2085}
2086#else
2087static inline void
2088encode_layoutreturn(struct xdr_stream *xdr,
2089 const struct nfs4_layoutreturn_args *args,
2090 struct compound_hdr *hdr)
2091{
2092}
2093#endif /* CONFIG_NFS_V4_1 */
2094
2095/*
2096 * END OF "GENERIC" ENCODE ROUTINES.
2097 */
2098
2099static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2100{
2101#if defined(CONFIG_NFS_V4_1)
2102 struct nfs4_session *session = args->sa_slot->table->session;
2103 if (session)
2104 return session->clp->cl_mvops->minor_version;
2105#endif /* CONFIG_NFS_V4_1 */
2106 return 0;
2107}
2108
2109/*
2110 * Encode an ACCESS request
2111 */
2112static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2113 const struct nfs4_accessargs *args)
2114{
2115 struct compound_hdr hdr = {
2116 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2117 };
2118
2119 encode_compound_hdr(xdr, req, &hdr);
2120 encode_sequence(xdr, &args->seq_args, &hdr);
2121 encode_putfh(xdr, args->fh, &hdr);
2122 encode_access(xdr, args->access, &hdr);
2123 encode_getfattr(xdr, args->bitmask, &hdr);
2124 encode_nops(&hdr);
2125}
2126
2127/*
2128 * Encode LOOKUP request
2129 */
2130static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2131 const struct nfs4_lookup_arg *args)
2132{
2133 struct compound_hdr hdr = {
2134 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2135 };
2136
2137 encode_compound_hdr(xdr, req, &hdr);
2138 encode_sequence(xdr, &args->seq_args, &hdr);
2139 encode_putfh(xdr, args->dir_fh, &hdr);
2140 encode_lookup(xdr, args->name, &hdr);
2141 encode_getfh(xdr, &hdr);
2142 encode_getfattr(xdr, args->bitmask, &hdr);
2143 encode_nops(&hdr);
2144}
2145
2146/*
2147 * Encode LOOKUP_ROOT request
2148 */
2149static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2150 struct xdr_stream *xdr,
2151 const struct nfs4_lookup_root_arg *args)
2152{
2153 struct compound_hdr hdr = {
2154 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2155 };
2156
2157 encode_compound_hdr(xdr, req, &hdr);
2158 encode_sequence(xdr, &args->seq_args, &hdr);
2159 encode_putrootfh(xdr, &hdr);
2160 encode_getfh(xdr, &hdr);
2161 encode_getfattr(xdr, args->bitmask, &hdr);
2162 encode_nops(&hdr);
2163}
2164
2165/*
2166 * Encode REMOVE request
2167 */
2168static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2169 const struct nfs_removeargs *args)
2170{
2171 struct compound_hdr hdr = {
2172 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2173 };
2174
2175 encode_compound_hdr(xdr, req, &hdr);
2176 encode_sequence(xdr, &args->seq_args, &hdr);
2177 encode_putfh(xdr, args->fh, &hdr);
2178 encode_remove(xdr, &args->name, &hdr);
2179 encode_nops(&hdr);
2180}
2181
2182/*
2183 * Encode RENAME request
2184 */
2185static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2186 const struct nfs_renameargs *args)
2187{
2188 struct compound_hdr hdr = {
2189 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2190 };
2191
2192 encode_compound_hdr(xdr, req, &hdr);
2193 encode_sequence(xdr, &args->seq_args, &hdr);
2194 encode_putfh(xdr, args->old_dir, &hdr);
2195 encode_savefh(xdr, &hdr);
2196 encode_putfh(xdr, args->new_dir, &hdr);
2197 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2198 encode_nops(&hdr);
2199}
2200
2201/*
2202 * Encode LINK request
2203 */
2204static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2205 const struct nfs4_link_arg *args)
2206{
2207 struct compound_hdr hdr = {
2208 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2209 };
2210
2211 encode_compound_hdr(xdr, req, &hdr);
2212 encode_sequence(xdr, &args->seq_args, &hdr);
2213 encode_putfh(xdr, args->fh, &hdr);
2214 encode_savefh(xdr, &hdr);
2215 encode_putfh(xdr, args->dir_fh, &hdr);
2216 encode_link(xdr, args->name, &hdr);
2217 encode_restorefh(xdr, &hdr);
2218 encode_getfattr(xdr, args->bitmask, &hdr);
2219 encode_nops(&hdr);
2220}
2221
2222/*
2223 * Encode CREATE request
2224 */
2225static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2226 const struct nfs4_create_arg *args)
2227{
2228 struct compound_hdr hdr = {
2229 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2230 };
2231
2232 encode_compound_hdr(xdr, req, &hdr);
2233 encode_sequence(xdr, &args->seq_args, &hdr);
2234 encode_putfh(xdr, args->dir_fh, &hdr);
2235 encode_create(xdr, args, &hdr);
2236 encode_getfh(xdr, &hdr);
2237 encode_getfattr(xdr, args->bitmask, &hdr);
2238 encode_nops(&hdr);
2239}
2240
2241/*
2242 * Encode SYMLINK request
2243 */
2244static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2245 const struct nfs4_create_arg *args)
2246{
2247 nfs4_xdr_enc_create(req, xdr, args);
2248}
2249
2250/*
2251 * Encode GETATTR request
2252 */
2253static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2254 const struct nfs4_getattr_arg *args)
2255{
2256 struct compound_hdr hdr = {
2257 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2258 };
2259
2260 encode_compound_hdr(xdr, req, &hdr);
2261 encode_sequence(xdr, &args->seq_args, &hdr);
2262 encode_putfh(xdr, args->fh, &hdr);
2263 encode_getfattr(xdr, args->bitmask, &hdr);
2264 encode_nops(&hdr);
2265}
2266
2267/*
2268 * Encode a CLOSE request
2269 */
2270static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2271 struct nfs_closeargs *args)
2272{
2273 struct compound_hdr hdr = {
2274 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2275 };
2276
2277 encode_compound_hdr(xdr, req, &hdr);
2278 encode_sequence(xdr, &args->seq_args, &hdr);
2279 encode_putfh(xdr, args->fh, &hdr);
2280 if (args->lr_args)
2281 encode_layoutreturn(xdr, args->lr_args, &hdr);
2282 if (args->bitmask != NULL)
2283 encode_getfattr(xdr, args->bitmask, &hdr);
2284 encode_close(xdr, args, &hdr);
2285 encode_nops(&hdr);
2286}
2287
2288/*
2289 * Encode an OPEN request
2290 */
2291static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2292 struct nfs_openargs *args)
2293{
2294 struct compound_hdr hdr = {
2295 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2296 };
2297
2298 encode_compound_hdr(xdr, req, &hdr);
2299 encode_sequence(xdr, &args->seq_args, &hdr);
2300 encode_putfh(xdr, args->fh, &hdr);
2301 encode_open(xdr, args, &hdr);
2302 encode_getfh(xdr, &hdr);
2303 if (args->access)
2304 encode_access(xdr, args->access, &hdr);
2305 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2306 encode_nops(&hdr);
2307}
2308
2309/*
2310 * Encode an OPEN_CONFIRM request
2311 */
2312static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2313 struct xdr_stream *xdr,
2314 struct nfs_open_confirmargs *args)
2315{
2316 struct compound_hdr hdr = {
2317 .nops = 0,
2318 };
2319
2320 encode_compound_hdr(xdr, req, &hdr);
2321 encode_putfh(xdr, args->fh, &hdr);
2322 encode_open_confirm(xdr, args, &hdr);
2323 encode_nops(&hdr);
2324}
2325
2326/*
2327 * Encode an OPEN request with no attributes.
2328 */
2329static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2330 struct xdr_stream *xdr,
2331 struct nfs_openargs *args)
2332{
2333 struct compound_hdr hdr = {
2334 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2335 };
2336
2337 encode_compound_hdr(xdr, req, &hdr);
2338 encode_sequence(xdr, &args->seq_args, &hdr);
2339 encode_putfh(xdr, args->fh, &hdr);
2340 encode_open(xdr, args, &hdr);
2341 if (args->access)
2342 encode_access(xdr, args->access, &hdr);
2343 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2344 encode_nops(&hdr);
2345}
2346
2347/*
2348 * Encode an OPEN_DOWNGRADE request
2349 */
2350static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2351 struct xdr_stream *xdr,
2352 struct nfs_closeargs *args)
2353{
2354 struct compound_hdr hdr = {
2355 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2356 };
2357
2358 encode_compound_hdr(xdr, req, &hdr);
2359 encode_sequence(xdr, &args->seq_args, &hdr);
2360 encode_putfh(xdr, args->fh, &hdr);
2361 if (args->lr_args)
2362 encode_layoutreturn(xdr, args->lr_args, &hdr);
2363 encode_open_downgrade(xdr, args, &hdr);
2364 encode_nops(&hdr);
2365}
2366
2367/*
2368 * Encode a LOCK request
2369 */
2370static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2371 struct nfs_lock_args *args)
2372{
2373 struct compound_hdr hdr = {
2374 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2375 };
2376
2377 encode_compound_hdr(xdr, req, &hdr);
2378 encode_sequence(xdr, &args->seq_args, &hdr);
2379 encode_putfh(xdr, args->fh, &hdr);
2380 encode_lock(xdr, args, &hdr);
2381 encode_nops(&hdr);
2382}
2383
2384/*
2385 * Encode a LOCKT request
2386 */
2387static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2388 struct nfs_lockt_args *args)
2389{
2390 struct compound_hdr hdr = {
2391 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2392 };
2393
2394 encode_compound_hdr(xdr, req, &hdr);
2395 encode_sequence(xdr, &args->seq_args, &hdr);
2396 encode_putfh(xdr, args->fh, &hdr);
2397 encode_lockt(xdr, args, &hdr);
2398 encode_nops(&hdr);
2399}
2400
2401/*
2402 * Encode a LOCKU request
2403 */
2404static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2405 struct nfs_locku_args *args)
2406{
2407 struct compound_hdr hdr = {
2408 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2409 };
2410
2411 encode_compound_hdr(xdr, req, &hdr);
2412 encode_sequence(xdr, &args->seq_args, &hdr);
2413 encode_putfh(xdr, args->fh, &hdr);
2414 encode_locku(xdr, args, &hdr);
2415 encode_nops(&hdr);
2416}
2417
2418static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2419 struct xdr_stream *xdr,
2420 struct nfs_release_lockowner_args *args)
2421{
2422 struct compound_hdr hdr = {
2423 .minorversion = 0,
2424 };
2425
2426 encode_compound_hdr(xdr, req, &hdr);
2427 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2428 encode_nops(&hdr);
2429}
2430
2431/*
2432 * Encode a READLINK request
2433 */
2434static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2435 const struct nfs4_readlink *args)
2436{
2437 struct compound_hdr hdr = {
2438 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2439 };
2440
2441 encode_compound_hdr(xdr, req, &hdr);
2442 encode_sequence(xdr, &args->seq_args, &hdr);
2443 encode_putfh(xdr, args->fh, &hdr);
2444 encode_readlink(xdr, args, req, &hdr);
2445
2446 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2447 args->pgbase, args->pglen);
2448 encode_nops(&hdr);
2449}
2450
2451/*
2452 * Encode a READDIR request
2453 */
2454static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2455 const struct nfs4_readdir_arg *args)
2456{
2457 struct compound_hdr hdr = {
2458 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2459 };
2460
2461 encode_compound_hdr(xdr, req, &hdr);
2462 encode_sequence(xdr, &args->seq_args, &hdr);
2463 encode_putfh(xdr, args->fh, &hdr);
2464 encode_readdir(xdr, args, req, &hdr);
2465
2466 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2467 args->pgbase, args->count);
2468 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2469 __func__, hdr.replen << 2, args->pages,
2470 args->pgbase, args->count);
2471 encode_nops(&hdr);
2472}
2473
2474/*
2475 * Encode a READ request
2476 */
2477static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2478 struct nfs_pgio_args *args)
2479{
2480 struct compound_hdr hdr = {
2481 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2482 };
2483
2484 encode_compound_hdr(xdr, req, &hdr);
2485 encode_sequence(xdr, &args->seq_args, &hdr);
2486 encode_putfh(xdr, args->fh, &hdr);
2487 encode_read(xdr, args, &hdr);
2488
2489 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2490 args->pages, args->pgbase, args->count);
2491 req->rq_rcv_buf.flags |= XDRBUF_READ;
2492 encode_nops(&hdr);
2493}
2494
2495/*
2496 * Encode an SETATTR request
2497 */
2498static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2499 struct nfs_setattrargs *args)
2500{
2501 struct compound_hdr hdr = {
2502 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2503 };
2504
2505 encode_compound_hdr(xdr, req, &hdr);
2506 encode_sequence(xdr, &args->seq_args, &hdr);
2507 encode_putfh(xdr, args->fh, &hdr);
2508 encode_setattr(xdr, args, args->server, &hdr);
2509 encode_getfattr(xdr, args->bitmask, &hdr);
2510 encode_nops(&hdr);
2511}
2512
2513/*
2514 * Encode a GETACL request
2515 */
2516static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2517 struct nfs_getaclargs *args)
2518{
2519 struct compound_hdr hdr = {
2520 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2521 };
2522 uint32_t replen;
2523
2524 encode_compound_hdr(xdr, req, &hdr);
2525 encode_sequence(xdr, &args->seq_args, &hdr);
2526 encode_putfh(xdr, args->fh, &hdr);
2527 replen = hdr.replen + op_decode_hdr_maxsz;
2528 encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2529
2530 xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2531 args->acl_pages, 0, args->acl_len);
2532
2533 encode_nops(&hdr);
2534}
2535
2536/*
2537 * Encode a WRITE request
2538 */
2539static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2540 struct nfs_pgio_args *args)
2541{
2542 struct compound_hdr hdr = {
2543 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2544 };
2545
2546 encode_compound_hdr(xdr, req, &hdr);
2547 encode_sequence(xdr, &args->seq_args, &hdr);
2548 encode_putfh(xdr, args->fh, &hdr);
2549 encode_write(xdr, args, &hdr);
2550 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2551 if (args->bitmask)
2552 encode_getfattr(xdr, args->bitmask, &hdr);
2553 encode_nops(&hdr);
2554}
2555
2556/*
2557 * a COMMIT request
2558 */
2559static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2560 struct nfs_commitargs *args)
2561{
2562 struct compound_hdr hdr = {
2563 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2564 };
2565
2566 encode_compound_hdr(xdr, req, &hdr);
2567 encode_sequence(xdr, &args->seq_args, &hdr);
2568 encode_putfh(xdr, args->fh, &hdr);
2569 encode_commit(xdr, args, &hdr);
2570 encode_nops(&hdr);
2571}
2572
2573/*
2574 * FSINFO request
2575 */
2576static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2577 struct nfs4_fsinfo_arg *args)
2578{
2579 struct compound_hdr hdr = {
2580 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2581 };
2582
2583 encode_compound_hdr(xdr, req, &hdr);
2584 encode_sequence(xdr, &args->seq_args, &hdr);
2585 encode_putfh(xdr, args->fh, &hdr);
2586 encode_fsinfo(xdr, args->bitmask, &hdr);
2587 encode_nops(&hdr);
2588}
2589
2590/*
2591 * a PATHCONF request
2592 */
2593static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2594 const struct nfs4_pathconf_arg *args)
2595{
2596 struct compound_hdr hdr = {
2597 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2598 };
2599
2600 encode_compound_hdr(xdr, req, &hdr);
2601 encode_sequence(xdr, &args->seq_args, &hdr);
2602 encode_putfh(xdr, args->fh, &hdr);
2603 encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2604 &hdr);
2605 encode_nops(&hdr);
2606}
2607
2608/*
2609 * a STATFS request
2610 */
2611static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2612 const struct nfs4_statfs_arg *args)
2613{
2614 struct compound_hdr hdr = {
2615 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2616 };
2617
2618 encode_compound_hdr(xdr, req, &hdr);
2619 encode_sequence(xdr, &args->seq_args, &hdr);
2620 encode_putfh(xdr, args->fh, &hdr);
2621 encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2622 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2623 encode_nops(&hdr);
2624}
2625
2626/*
2627 * GETATTR_BITMAP request
2628 */
2629static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2630 struct xdr_stream *xdr,
2631 struct nfs4_server_caps_arg *args)
2632{
2633 const u32 *bitmask = args->bitmask;
2634 struct compound_hdr hdr = {
2635 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2636 };
2637
2638 encode_compound_hdr(xdr, req, &hdr);
2639 encode_sequence(xdr, &args->seq_args, &hdr);
2640 encode_putfh(xdr, args->fhandle, &hdr);
2641 encode_getattr_three(xdr, bitmask[0], bitmask[1], bitmask[2], &hdr);
2642 encode_nops(&hdr);
2643}
2644
2645/*
2646 * a RENEW request
2647 */
2648static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2649 struct nfs_client *clp)
2650{
2651 struct compound_hdr hdr = {
2652 .nops = 0,
2653 };
2654
2655 encode_compound_hdr(xdr, req, &hdr);
2656 encode_renew(xdr, clp->cl_clientid, &hdr);
2657 encode_nops(&hdr);
2658}
2659
2660/*
2661 * a SETCLIENTID request
2662 */
2663static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2664 struct xdr_stream *xdr,
2665 struct nfs4_setclientid *sc)
2666{
2667 struct compound_hdr hdr = {
2668 .nops = 0,
2669 };
2670
2671 encode_compound_hdr(xdr, req, &hdr);
2672 encode_setclientid(xdr, sc, &hdr);
2673 encode_nops(&hdr);
2674}
2675
2676/*
2677 * a SETCLIENTID_CONFIRM request
2678 */
2679static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2680 struct xdr_stream *xdr,
2681 struct nfs4_setclientid_res *arg)
2682{
2683 struct compound_hdr hdr = {
2684 .nops = 0,
2685 };
2686
2687 encode_compound_hdr(xdr, req, &hdr);
2688 encode_setclientid_confirm(xdr, arg, &hdr);
2689 encode_nops(&hdr);
2690}
2691
2692/*
2693 * DELEGRETURN request
2694 */
2695static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2696 struct xdr_stream *xdr,
2697 const struct nfs4_delegreturnargs *args)
2698{
2699 struct compound_hdr hdr = {
2700 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2701 };
2702
2703 encode_compound_hdr(xdr, req, &hdr);
2704 encode_sequence(xdr, &args->seq_args, &hdr);
2705 encode_putfh(xdr, args->fhandle, &hdr);
2706 if (args->lr_args)
2707 encode_layoutreturn(xdr, args->lr_args, &hdr);
2708 if (args->bitmask)
2709 encode_getfattr(xdr, args->bitmask, &hdr);
2710 encode_delegreturn(xdr, args->stateid, &hdr);
2711 encode_nops(&hdr);
2712}
2713
2714/*
2715 * Encode FS_LOCATIONS request
2716 */
2717static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2718 struct xdr_stream *xdr,
2719 struct nfs4_fs_locations_arg *args)
2720{
2721 struct compound_hdr hdr = {
2722 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2723 };
2724 uint32_t replen;
2725
2726 encode_compound_hdr(xdr, req, &hdr);
2727 encode_sequence(xdr, &args->seq_args, &hdr);
2728 if (args->migration) {
2729 encode_putfh(xdr, args->fh, &hdr);
2730 replen = hdr.replen;
2731 encode_fs_locations(xdr, args->bitmask, &hdr);
2732 if (args->renew)
2733 encode_renew(xdr, args->clientid, &hdr);
2734 } else {
2735 encode_putfh(xdr, args->dir_fh, &hdr);
2736 encode_lookup(xdr, args->name, &hdr);
2737 replen = hdr.replen;
2738 encode_fs_locations(xdr, args->bitmask, &hdr);
2739 }
2740
2741 /* Set up reply kvec to capture returned fs_locations array. */
2742 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2743 0, PAGE_SIZE);
2744 encode_nops(&hdr);
2745}
2746
2747/*
2748 * Encode SECINFO request
2749 */
2750static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2751 struct xdr_stream *xdr,
2752 struct nfs4_secinfo_arg *args)
2753{
2754 struct compound_hdr hdr = {
2755 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2756 };
2757
2758 encode_compound_hdr(xdr, req, &hdr);
2759 encode_sequence(xdr, &args->seq_args, &hdr);
2760 encode_putfh(xdr, args->dir_fh, &hdr);
2761 encode_secinfo(xdr, args->name, &hdr);
2762 encode_nops(&hdr);
2763}
2764
2765/*
2766 * Encode FSID_PRESENT request
2767 */
2768static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2769 struct xdr_stream *xdr,
2770 struct nfs4_fsid_present_arg *args)
2771{
2772 struct compound_hdr hdr = {
2773 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2774 };
2775
2776 encode_compound_hdr(xdr, req, &hdr);
2777 encode_sequence(xdr, &args->seq_args, &hdr);
2778 encode_putfh(xdr, args->fh, &hdr);
2779 encode_getfh(xdr, &hdr);
2780 if (args->renew)
2781 encode_renew(xdr, args->clientid, &hdr);
2782 encode_nops(&hdr);
2783}
2784
2785#if defined(CONFIG_NFS_V4_1)
2786/*
2787 * BIND_CONN_TO_SESSION request
2788 */
2789static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2790 struct xdr_stream *xdr,
2791 struct nfs41_bind_conn_to_session_args *args)
2792{
2793 struct compound_hdr hdr = {
2794 .minorversion = args->client->cl_mvops->minor_version,
2795 };
2796
2797 encode_compound_hdr(xdr, req, &hdr);
2798 encode_bind_conn_to_session(xdr, args, &hdr);
2799 encode_nops(&hdr);
2800}
2801
2802/*
2803 * EXCHANGE_ID request
2804 */
2805static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2806 struct xdr_stream *xdr,
2807 struct nfs41_exchange_id_args *args)
2808{
2809 struct compound_hdr hdr = {
2810 .minorversion = args->client->cl_mvops->minor_version,
2811 };
2812
2813 encode_compound_hdr(xdr, req, &hdr);
2814 encode_exchange_id(xdr, args, &hdr);
2815 encode_nops(&hdr);
2816}
2817
2818/*
2819 * a CREATE_SESSION request
2820 */
2821static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2822 struct xdr_stream *xdr,
2823 struct nfs41_create_session_args *args)
2824{
2825 struct compound_hdr hdr = {
2826 .minorversion = args->client->cl_mvops->minor_version,
2827 };
2828
2829 encode_compound_hdr(xdr, req, &hdr);
2830 encode_create_session(xdr, args, &hdr);
2831 encode_nops(&hdr);
2832}
2833
2834/*
2835 * a DESTROY_SESSION request
2836 */
2837static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2838 struct xdr_stream *xdr,
2839 struct nfs4_session *session)
2840{
2841 struct compound_hdr hdr = {
2842 .minorversion = session->clp->cl_mvops->minor_version,
2843 };
2844
2845 encode_compound_hdr(xdr, req, &hdr);
2846 encode_destroy_session(xdr, session, &hdr);
2847 encode_nops(&hdr);
2848}
2849
2850/*
2851 * a DESTROY_CLIENTID request
2852 */
2853static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2854 struct xdr_stream *xdr,
2855 struct nfs_client *clp)
2856{
2857 struct compound_hdr hdr = {
2858 .minorversion = clp->cl_mvops->minor_version,
2859 };
2860
2861 encode_compound_hdr(xdr, req, &hdr);
2862 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2863 encode_nops(&hdr);
2864}
2865
2866/*
2867 * a SEQUENCE request
2868 */
2869static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2870 struct nfs4_sequence_args *args)
2871{
2872 struct compound_hdr hdr = {
2873 .minorversion = nfs4_xdr_minorversion(args),
2874 };
2875
2876 encode_compound_hdr(xdr, req, &hdr);
2877 encode_sequence(xdr, args, &hdr);
2878 encode_nops(&hdr);
2879}
2880
2881/*
2882 * a GET_LEASE_TIME request
2883 */
2884static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2885 struct xdr_stream *xdr,
2886 struct nfs4_get_lease_time_args *args)
2887{
2888 struct compound_hdr hdr = {
2889 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2890 };
2891 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2892
2893 encode_compound_hdr(xdr, req, &hdr);
2894 encode_sequence(xdr, &args->la_seq_args, &hdr);
2895 encode_putrootfh(xdr, &hdr);
2896 encode_fsinfo(xdr, lease_bitmap, &hdr);
2897 encode_nops(&hdr);
2898}
2899
2900/*
2901 * a RECLAIM_COMPLETE request
2902 */
2903static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2904 struct xdr_stream *xdr,
2905 struct nfs41_reclaim_complete_args *args)
2906{
2907 struct compound_hdr hdr = {
2908 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2909 };
2910
2911 encode_compound_hdr(xdr, req, &hdr);
2912 encode_sequence(xdr, &args->seq_args, &hdr);
2913 encode_reclaim_complete(xdr, args, &hdr);
2914 encode_nops(&hdr);
2915}
2916
2917/*
2918 * Encode GETDEVICEINFO request
2919 */
2920static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2921 struct xdr_stream *xdr,
2922 struct nfs4_getdeviceinfo_args *args)
2923{
2924 struct compound_hdr hdr = {
2925 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2926 };
2927
2928 encode_compound_hdr(xdr, req, &hdr);
2929 encode_sequence(xdr, &args->seq_args, &hdr);
2930 encode_getdeviceinfo(xdr, args, &hdr);
2931
2932 /* set up reply kvec. Subtract notification bitmap max size (2)
2933 * so that notification bitmap is put in xdr_buf tail */
2934 xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2935 args->pdev->pages, args->pdev->pgbase,
2936 args->pdev->pglen);
2937
2938 encode_nops(&hdr);
2939}
2940
2941/*
2942 * Encode LAYOUTGET request
2943 */
2944static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2945 struct xdr_stream *xdr,
2946 struct nfs4_layoutget_args *args)
2947{
2948 struct compound_hdr hdr = {
2949 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2950 };
2951
2952 encode_compound_hdr(xdr, req, &hdr);
2953 encode_sequence(xdr, &args->seq_args, &hdr);
2954 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2955 encode_layoutget(xdr, args, &hdr);
2956
2957 xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2958 args->layout.pages, 0, args->layout.pglen);
2959
2960 encode_nops(&hdr);
2961}
2962
2963/*
2964 * Encode LAYOUTCOMMIT request
2965 */
2966static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2967 struct xdr_stream *xdr,
2968 struct nfs4_layoutcommit_args *args)
2969{
2970 struct nfs4_layoutcommit_data *data =
2971 container_of(args, struct nfs4_layoutcommit_data, args);
2972 struct compound_hdr hdr = {
2973 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2974 };
2975
2976 encode_compound_hdr(xdr, req, &hdr);
2977 encode_sequence(xdr, &args->seq_args, &hdr);
2978 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2979 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
2980 encode_getfattr(xdr, args->bitmask, &hdr);
2981 encode_nops(&hdr);
2982}
2983
2984/*
2985 * Encode LAYOUTRETURN request
2986 */
2987static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
2988 struct xdr_stream *xdr,
2989 struct nfs4_layoutreturn_args *args)
2990{
2991 struct compound_hdr hdr = {
2992 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2993 };
2994
2995 encode_compound_hdr(xdr, req, &hdr);
2996 encode_sequence(xdr, &args->seq_args, &hdr);
2997 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2998 encode_layoutreturn(xdr, args, &hdr);
2999 encode_nops(&hdr);
3000}
3001
3002/*
3003 * Encode SECINFO_NO_NAME request
3004 */
3005static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3006 struct xdr_stream *xdr,
3007 struct nfs41_secinfo_no_name_args *args)
3008{
3009 struct compound_hdr hdr = {
3010 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3011 };
3012
3013 encode_compound_hdr(xdr, req, &hdr);
3014 encode_sequence(xdr, &args->seq_args, &hdr);
3015 encode_putrootfh(xdr, &hdr);
3016 encode_secinfo_no_name(xdr, args, &hdr);
3017 encode_nops(&hdr);
3018 return 0;
3019}
3020
3021/*
3022 * Encode TEST_STATEID request
3023 */
3024static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3025 struct xdr_stream *xdr,
3026 struct nfs41_test_stateid_args *args)
3027{
3028 struct compound_hdr hdr = {
3029 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3030 };
3031
3032 encode_compound_hdr(xdr, req, &hdr);
3033 encode_sequence(xdr, &args->seq_args, &hdr);
3034 encode_test_stateid(xdr, args, &hdr);
3035 encode_nops(&hdr);
3036}
3037
3038/*
3039 * Encode FREE_STATEID request
3040 */
3041static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3042 struct xdr_stream *xdr,
3043 struct nfs41_free_stateid_args *args)
3044{
3045 struct compound_hdr hdr = {
3046 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3047 };
3048
3049 encode_compound_hdr(xdr, req, &hdr);
3050 encode_sequence(xdr, &args->seq_args, &hdr);
3051 encode_free_stateid(xdr, args, &hdr);
3052 encode_nops(&hdr);
3053}
3054#endif /* CONFIG_NFS_V4_1 */
3055
3056static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
3057{
3058 dprintk("nfs: %s: prematurely hit end of receive buffer. "
3059 "Remaining buffer length is %tu words.\n",
3060 func, xdr->end - xdr->p);
3061}
3062
3063static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3064{
3065 __be32 *p;
3066
3067 p = xdr_inline_decode(xdr, 4);
3068 if (unlikely(!p))
3069 goto out_overflow;
3070 *len = be32_to_cpup(p);
3071 p = xdr_inline_decode(xdr, *len);
3072 if (unlikely(!p))
3073 goto out_overflow;
3074 *string = (char *)p;
3075 return 0;
3076out_overflow:
3077 print_overflow_msg(__func__, xdr);
3078 return -EIO;
3079}
3080
3081static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3082{
3083 __be32 *p;
3084
3085 p = xdr_inline_decode(xdr, 8);
3086 if (unlikely(!p))
3087 goto out_overflow;
3088 hdr->status = be32_to_cpup(p++);
3089 hdr->taglen = be32_to_cpup(p);
3090
3091 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3092 if (unlikely(!p))
3093 goto out_overflow;
3094 hdr->tag = (char *)p;
3095 p += XDR_QUADLEN(hdr->taglen);
3096 hdr->nops = be32_to_cpup(p);
3097 if (unlikely(hdr->nops < 1))
3098 return nfs4_stat_to_errno(hdr->status);
3099 return 0;
3100out_overflow:
3101 print_overflow_msg(__func__, xdr);
3102 return -EIO;
3103}
3104
3105static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3106 int *nfs_retval)
3107{
3108 __be32 *p;
3109 uint32_t opnum;
3110 int32_t nfserr;
3111
3112 p = xdr_inline_decode(xdr, 8);
3113 if (unlikely(!p))
3114 goto out_overflow;
3115 opnum = be32_to_cpup(p++);
3116 if (unlikely(opnum != expected))
3117 goto out_bad_operation;
3118 nfserr = be32_to_cpup(p);
3119 if (nfserr == NFS_OK)
3120 *nfs_retval = 0;
3121 else
3122 *nfs_retval = nfs4_stat_to_errno(nfserr);
3123 return true;
3124out_bad_operation:
3125 dprintk("nfs: Server returned operation"
3126 " %d but we issued a request for %d\n",
3127 opnum, expected);
3128 *nfs_retval = -EREMOTEIO;
3129 return false;
3130out_overflow:
3131 print_overflow_msg(__func__, xdr);
3132 *nfs_retval = -EIO;
3133 return false;
3134}
3135
3136static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3137{
3138 int retval;
3139
3140 __decode_op_hdr(xdr, expected, &retval);
3141 return retval;
3142}
3143
3144/* Dummy routine */
3145static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
3146{
3147 __be32 *p;
3148 unsigned int strlen;
3149 char *str;
3150
3151 p = xdr_inline_decode(xdr, 12);
3152 if (likely(p))
3153 return decode_opaque_inline(xdr, &strlen, &str);
3154 print_overflow_msg(__func__, xdr);
3155 return -EIO;
3156}
3157
3158static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3159{
3160 uint32_t bmlen;
3161 __be32 *p;
3162
3163 p = xdr_inline_decode(xdr, 4);
3164 if (unlikely(!p))
3165 goto out_overflow;
3166 bmlen = be32_to_cpup(p);
3167
3168 bitmap[0] = bitmap[1] = bitmap[2] = 0;
3169 p = xdr_inline_decode(xdr, (bmlen << 2));
3170 if (unlikely(!p))
3171 goto out_overflow;
3172 if (bmlen > 0) {
3173 bitmap[0] = be32_to_cpup(p++);
3174 if (bmlen > 1) {
3175 bitmap[1] = be32_to_cpup(p++);
3176 if (bmlen > 2)
3177 bitmap[2] = be32_to_cpup(p);
3178 }
3179 }
3180 return 0;
3181out_overflow:
3182 print_overflow_msg(__func__, xdr);
3183 return -EIO;
3184}
3185
3186static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3187{
3188 __be32 *p;
3189
3190 p = xdr_inline_decode(xdr, 4);
3191 if (unlikely(!p))
3192 goto out_overflow;
3193 *attrlen = be32_to_cpup(p);
3194 *savep = xdr_stream_pos(xdr);
3195 return 0;
3196out_overflow:
3197 print_overflow_msg(__func__, xdr);
3198 return -EIO;
3199}
3200
3201static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3202{
3203 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3204 int ret;
3205 ret = decode_attr_bitmap(xdr, bitmask);
3206 if (unlikely(ret < 0))
3207 return ret;
3208 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3209 } else
3210 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3211 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3212 bitmask[0], bitmask[1], bitmask[2]);
3213 return 0;
3214}
3215
3216static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3217{
3218 __be32 *p;
3219 int ret = 0;
3220
3221 *type = 0;
3222 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3223 return -EIO;
3224 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3225 p = xdr_inline_decode(xdr, 4);
3226 if (unlikely(!p))
3227 goto out_overflow;
3228 *type = be32_to_cpup(p);
3229 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3230 dprintk("%s: bad type %d\n", __func__, *type);
3231 return -EIO;
3232 }
3233 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3234 ret = NFS_ATTR_FATTR_TYPE;
3235 }
3236 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3237 return ret;
3238out_overflow:
3239 print_overflow_msg(__func__, xdr);
3240 return -EIO;
3241}
3242
3243static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3244 uint32_t *bitmap, uint32_t *type)
3245{
3246 __be32 *p;
3247
3248 *type = 0;
3249 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3250 return -EIO;
3251 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3252 p = xdr_inline_decode(xdr, 4);
3253 if (unlikely(!p))
3254 goto out_overflow;
3255 *type = be32_to_cpup(p);
3256 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3257 }
3258 dprintk("%s: expire type=0x%x\n", __func__, *type);
3259 return 0;
3260out_overflow:
3261 print_overflow_msg(__func__, xdr);
3262 return -EIO;
3263}
3264
3265static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3266{
3267 __be32 *p;
3268 int ret = 0;
3269
3270 *change = 0;
3271 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3272 return -EIO;
3273 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3274 p = xdr_inline_decode(xdr, 8);
3275 if (unlikely(!p))
3276 goto out_overflow;
3277 xdr_decode_hyper(p, change);
3278 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3279 ret = NFS_ATTR_FATTR_CHANGE;
3280 }
3281 dprintk("%s: change attribute=%Lu\n", __func__,
3282 (unsigned long long)*change);
3283 return ret;
3284out_overflow:
3285 print_overflow_msg(__func__, xdr);
3286 return -EIO;
3287}
3288
3289static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3290{
3291 __be32 *p;
3292 int ret = 0;
3293
3294 *size = 0;
3295 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3296 return -EIO;
3297 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3298 p = xdr_inline_decode(xdr, 8);
3299 if (unlikely(!p))
3300 goto out_overflow;
3301 xdr_decode_hyper(p, size);
3302 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3303 ret = NFS_ATTR_FATTR_SIZE;
3304 }
3305 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3306 return ret;
3307out_overflow:
3308 print_overflow_msg(__func__, xdr);
3309 return -EIO;
3310}
3311
3312static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3313{
3314 __be32 *p;
3315
3316 *res = 0;
3317 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3318 return -EIO;
3319 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3320 p = xdr_inline_decode(xdr, 4);
3321 if (unlikely(!p))
3322 goto out_overflow;
3323 *res = be32_to_cpup(p);
3324 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3325 }
3326 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3327 return 0;
3328out_overflow:
3329 print_overflow_msg(__func__, xdr);
3330 return -EIO;
3331}
3332
3333static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3334{
3335 __be32 *p;
3336
3337 *res = 0;
3338 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3339 return -EIO;
3340 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3341 p = xdr_inline_decode(xdr, 4);
3342 if (unlikely(!p))
3343 goto out_overflow;
3344 *res = be32_to_cpup(p);
3345 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3346 }
3347 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3348 return 0;
3349out_overflow:
3350 print_overflow_msg(__func__, xdr);
3351 return -EIO;
3352}
3353
3354static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3355{
3356 __be32 *p;
3357 int ret = 0;
3358
3359 fsid->major = 0;
3360 fsid->minor = 0;
3361 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3362 return -EIO;
3363 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3364 p = xdr_inline_decode(xdr, 16);
3365 if (unlikely(!p))
3366 goto out_overflow;
3367 p = xdr_decode_hyper(p, &fsid->major);
3368 xdr_decode_hyper(p, &fsid->minor);
3369 bitmap[0] &= ~FATTR4_WORD0_FSID;
3370 ret = NFS_ATTR_FATTR_FSID;
3371 }
3372 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3373 (unsigned long long)fsid->major,
3374 (unsigned long long)fsid->minor);
3375 return ret;
3376out_overflow:
3377 print_overflow_msg(__func__, xdr);
3378 return -EIO;
3379}
3380
3381static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3382{
3383 __be32 *p;
3384
3385 *res = 60;
3386 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3387 return -EIO;
3388 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3389 p = xdr_inline_decode(xdr, 4);
3390 if (unlikely(!p))
3391 goto out_overflow;
3392 *res = be32_to_cpup(p);
3393 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3394 }
3395 dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3396 return 0;
3397out_overflow:
3398 print_overflow_msg(__func__, xdr);
3399 return -EIO;
3400}
3401
3402static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3403{
3404 __be32 *p;
3405
3406 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3407 return -EIO;
3408 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3409 p = xdr_inline_decode(xdr, 4);
3410 if (unlikely(!p))
3411 goto out_overflow;
3412 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3413 *res = -be32_to_cpup(p);
3414 }
3415 return 0;
3416out_overflow:
3417 print_overflow_msg(__func__, xdr);
3418 return -EIO;
3419}
3420
3421static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3422 uint32_t *bitmap, uint32_t *bitmask)
3423{
3424 if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3425 int ret;
3426 ret = decode_attr_bitmap(xdr, bitmask);
3427 if (unlikely(ret < 0))
3428 return ret;
3429 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3430 } else
3431 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3432 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3433 bitmask[0], bitmask[1], bitmask[2]);
3434 return 0;
3435}
3436
3437static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3438{
3439 __be32 *p;
3440 int len;
3441
3442 if (fh != NULL)
3443 memset(fh, 0, sizeof(*fh));
3444
3445 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3446 return -EIO;
3447 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3448 p = xdr_inline_decode(xdr, 4);
3449 if (unlikely(!p))
3450 goto out_overflow;
3451 len = be32_to_cpup(p);
3452 if (len > NFS4_FHSIZE)
3453 return -EIO;
3454 p = xdr_inline_decode(xdr, len);
3455 if (unlikely(!p))
3456 goto out_overflow;
3457 if (fh != NULL) {
3458 memcpy(fh->data, p, len);
3459 fh->size = len;
3460 }
3461 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3462 }
3463 return 0;
3464out_overflow:
3465 print_overflow_msg(__func__, xdr);
3466 return -EIO;
3467}
3468
3469static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3470{
3471 __be32 *p;
3472
3473 *res = 0;
3474 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3475 return -EIO;
3476 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3477 p = xdr_inline_decode(xdr, 4);
3478 if (unlikely(!p))
3479 goto out_overflow;
3480 *res = be32_to_cpup(p);
3481 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3482 }
3483 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3484 return 0;
3485out_overflow:
3486 print_overflow_msg(__func__, xdr);
3487 return -EIO;
3488}
3489
3490static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3491{
3492 __be32 *p;
3493 int ret = 0;
3494
3495 *fileid = 0;
3496 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3497 return -EIO;
3498 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3499 p = xdr_inline_decode(xdr, 8);
3500 if (unlikely(!p))
3501 goto out_overflow;
3502 xdr_decode_hyper(p, fileid);
3503 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3504 ret = NFS_ATTR_FATTR_FILEID;
3505 }
3506 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3507 return ret;
3508out_overflow:
3509 print_overflow_msg(__func__, xdr);
3510 return -EIO;
3511}
3512
3513static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3514{
3515 __be32 *p;
3516 int ret = 0;
3517
3518 *fileid = 0;
3519 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3520 return -EIO;
3521 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3522 p = xdr_inline_decode(xdr, 8);
3523 if (unlikely(!p))
3524 goto out_overflow;
3525 xdr_decode_hyper(p, fileid);
3526 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3527 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3528 }
3529 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3530 return ret;
3531out_overflow:
3532 print_overflow_msg(__func__, xdr);
3533 return -EIO;
3534}
3535
3536static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3537{
3538 __be32 *p;
3539 int status = 0;
3540
3541 *res = 0;
3542 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3543 return -EIO;
3544 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3545 p = xdr_inline_decode(xdr, 8);
3546 if (unlikely(!p))
3547 goto out_overflow;
3548 xdr_decode_hyper(p, res);
3549 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3550 }
3551 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3552 return status;
3553out_overflow:
3554 print_overflow_msg(__func__, xdr);
3555 return -EIO;
3556}
3557
3558static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3559{
3560 __be32 *p;
3561 int status = 0;
3562
3563 *res = 0;
3564 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3565 return -EIO;
3566 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3567 p = xdr_inline_decode(xdr, 8);
3568 if (unlikely(!p))
3569 goto out_overflow;
3570 xdr_decode_hyper(p, res);
3571 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3572 }
3573 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3574 return status;
3575out_overflow:
3576 print_overflow_msg(__func__, xdr);
3577 return -EIO;
3578}
3579
3580static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3581{
3582 __be32 *p;
3583 int status = 0;
3584
3585 *res = 0;
3586 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3587 return -EIO;
3588 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3589 p = xdr_inline_decode(xdr, 8);
3590 if (unlikely(!p))
3591 goto out_overflow;
3592 xdr_decode_hyper(p, res);
3593 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3594 }
3595 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3596 return status;
3597out_overflow:
3598 print_overflow_msg(__func__, xdr);
3599 return -EIO;
3600}
3601
3602static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3603{
3604 u32 n;
3605 __be32 *p;
3606 int status = 0;
3607
3608 p = xdr_inline_decode(xdr, 4);
3609 if (unlikely(!p))
3610 goto out_overflow;
3611 n = be32_to_cpup(p);
3612 if (n == 0)
3613 goto root_path;
3614 dprintk("pathname4: ");
3615 if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3616 dprintk("cannot parse %d components in path\n", n);
3617 goto out_eio;
3618 }
3619 for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3620 struct nfs4_string *component = &path->components[path->ncomponents];
3621 status = decode_opaque_inline(xdr, &component->len, &component->data);
3622 if (unlikely(status != 0))
3623 goto out_eio;
3624 ifdebug (XDR)
3625 pr_cont("%s%.*s ",
3626 (path->ncomponents != n ? "/ " : ""),
3627 component->len, component->data);
3628 }
3629out:
3630 return status;
3631root_path:
3632/* a root pathname is sent as a zero component4 */
3633 path->ncomponents = 1;
3634 path->components[0].len=0;
3635 path->components[0].data=NULL;
3636 dprintk("pathname4: /\n");
3637 goto out;
3638out_eio:
3639 dprintk(" status %d", status);
3640 status = -EIO;
3641 goto out;
3642out_overflow:
3643 print_overflow_msg(__func__, xdr);
3644 return -EIO;
3645}
3646
3647static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3648{
3649 int n;
3650 __be32 *p;
3651 int status = -EIO;
3652
3653 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3654 goto out;
3655 status = 0;
3656 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3657 goto out;
3658 bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3659 status = -EIO;
3660 /* Ignore borken servers that return unrequested attrs */
3661 if (unlikely(res == NULL))
3662 goto out;
3663 dprintk("%s: fsroot:\n", __func__);
3664 status = decode_pathname(xdr, &res->fs_path);
3665 if (unlikely(status != 0))
3666 goto out;
3667 p = xdr_inline_decode(xdr, 4);
3668 if (unlikely(!p))
3669 goto out_overflow;
3670 n = be32_to_cpup(p);
3671 if (n <= 0)
3672 goto out_eio;
3673 for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3674 u32 m;
3675 struct nfs4_fs_location *loc;
3676
3677 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3678 break;
3679 loc = &res->locations[res->nlocations];
3680 p = xdr_inline_decode(xdr, 4);
3681 if (unlikely(!p))
3682 goto out_overflow;
3683 m = be32_to_cpup(p);
3684
3685 dprintk("%s: servers:\n", __func__);
3686 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3687 struct nfs4_string *server;
3688
3689 if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3690 unsigned int i;
3691 dprintk("%s: using first %u of %u servers "
3692 "returned for location %u\n",
3693 __func__,
3694 NFS4_FS_LOCATION_MAXSERVERS,
3695 m, res->nlocations);
3696 for (i = loc->nservers; i < m; i++) {
3697 unsigned int len;
3698 char *data;
3699 status = decode_opaque_inline(xdr, &len, &data);
3700 if (unlikely(status != 0))
3701 goto out_eio;
3702 }
3703 break;
3704 }
3705 server = &loc->servers[loc->nservers];
3706 status = decode_opaque_inline(xdr, &server->len, &server->data);
3707 if (unlikely(status != 0))
3708 goto out_eio;
3709 dprintk("%s ", server->data);
3710 }
3711 status = decode_pathname(xdr, &loc->rootpath);
3712 if (unlikely(status != 0))
3713 goto out_eio;
3714 }
3715 if (res->nlocations != 0)
3716 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3717out:
3718 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3719 return status;
3720out_overflow:
3721 print_overflow_msg(__func__, xdr);
3722out_eio:
3723 status = -EIO;
3724 goto out;
3725}
3726
3727static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3728{
3729 __be32 *p;
3730 int status = 0;
3731
3732 *res = 0;
3733 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3734 return -EIO;
3735 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3736 p = xdr_inline_decode(xdr, 8);
3737 if (unlikely(!p))
3738 goto out_overflow;
3739 xdr_decode_hyper(p, res);
3740 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3741 }
3742 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3743 return status;
3744out_overflow:
3745 print_overflow_msg(__func__, xdr);
3746 return -EIO;
3747}
3748
3749static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3750{
3751 __be32 *p;
3752 int status = 0;
3753
3754 *maxlink = 1;
3755 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3756 return -EIO;
3757 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3758 p = xdr_inline_decode(xdr, 4);
3759 if (unlikely(!p))
3760 goto out_overflow;
3761 *maxlink = be32_to_cpup(p);
3762 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3763 }
3764 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3765 return status;
3766out_overflow:
3767 print_overflow_msg(__func__, xdr);
3768 return -EIO;
3769}
3770
3771static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3772{
3773 __be32 *p;
3774 int status = 0;
3775
3776 *maxname = 1024;
3777 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3778 return -EIO;
3779 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3780 p = xdr_inline_decode(xdr, 4);
3781 if (unlikely(!p))
3782 goto out_overflow;
3783 *maxname = be32_to_cpup(p);
3784 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3785 }
3786 dprintk("%s: maxname=%u\n", __func__, *maxname);
3787 return status;
3788out_overflow:
3789 print_overflow_msg(__func__, xdr);
3790 return -EIO;
3791}
3792
3793static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3794{
3795 __be32 *p;
3796 int status = 0;
3797
3798 *res = 1024;
3799 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3800 return -EIO;
3801 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3802 uint64_t maxread;
3803 p = xdr_inline_decode(xdr, 8);
3804 if (unlikely(!p))
3805 goto out_overflow;
3806 xdr_decode_hyper(p, &maxread);
3807 if (maxread > 0x7FFFFFFF)
3808 maxread = 0x7FFFFFFF;
3809 *res = (uint32_t)maxread;
3810 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3811 }
3812 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3813 return status;
3814out_overflow:
3815 print_overflow_msg(__func__, xdr);
3816 return -EIO;
3817}
3818
3819static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3820{
3821 __be32 *p;
3822 int status = 0;
3823
3824 *res = 1024;
3825 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3826 return -EIO;
3827 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3828 uint64_t maxwrite;
3829 p = xdr_inline_decode(xdr, 8);
3830 if (unlikely(!p))
3831 goto out_overflow;
3832 xdr_decode_hyper(p, &maxwrite);
3833 if (maxwrite > 0x7FFFFFFF)
3834 maxwrite = 0x7FFFFFFF;
3835 *res = (uint32_t)maxwrite;
3836 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3837 }
3838 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3839 return status;
3840out_overflow:
3841 print_overflow_msg(__func__, xdr);
3842 return -EIO;
3843}
3844
3845static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3846{
3847 uint32_t tmp;
3848 __be32 *p;
3849 int ret = 0;
3850
3851 *mode = 0;
3852 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3853 return -EIO;
3854 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3855 p = xdr_inline_decode(xdr, 4);
3856 if (unlikely(!p))
3857 goto out_overflow;
3858 tmp = be32_to_cpup(p);
3859 *mode = tmp & ~S_IFMT;
3860 bitmap[1] &= ~FATTR4_WORD1_MODE;
3861 ret = NFS_ATTR_FATTR_MODE;
3862 }
3863 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3864 return ret;
3865out_overflow:
3866 print_overflow_msg(__func__, xdr);
3867 return -EIO;
3868}
3869
3870static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3871{
3872 __be32 *p;
3873 int ret = 0;
3874
3875 *nlink = 1;
3876 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3877 return -EIO;
3878 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3879 p = xdr_inline_decode(xdr, 4);
3880 if (unlikely(!p))
3881 goto out_overflow;
3882 *nlink = be32_to_cpup(p);
3883 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3884 ret = NFS_ATTR_FATTR_NLINK;
3885 }
3886 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3887 return ret;
3888out_overflow:
3889 print_overflow_msg(__func__, xdr);
3890 return -EIO;
3891}
3892
3893static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3894 const struct nfs_server *server, kuid_t *uid,
3895 struct nfs4_string *owner_name)
3896{
3897 uint32_t len;
3898 __be32 *p;
3899 int ret = 0;
3900
3901 *uid = make_kuid(&init_user_ns, -2);
3902 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3903 return -EIO;
3904 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3905 p = xdr_inline_decode(xdr, 4);
3906 if (unlikely(!p))
3907 goto out_overflow;
3908 len = be32_to_cpup(p);
3909 p = xdr_inline_decode(xdr, len);
3910 if (unlikely(!p))
3911 goto out_overflow;
3912 if (owner_name != NULL) {
3913 owner_name->data = kmemdup(p, len, GFP_NOWAIT);
3914 if (owner_name->data != NULL) {
3915 owner_name->len = len;
3916 ret = NFS_ATTR_FATTR_OWNER_NAME;
3917 }
3918 } else if (len < XDR_MAX_NETOBJ) {
3919 if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3920 ret = NFS_ATTR_FATTR_OWNER;
3921 else
3922 dprintk("%s: nfs_map_name_to_uid failed!\n",
3923 __func__);
3924 } else
3925 dprintk("%s: name too long (%u)!\n",
3926 __func__, len);
3927 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3928 }
3929 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3930 return ret;
3931out_overflow:
3932 print_overflow_msg(__func__, xdr);
3933 return -EIO;
3934}
3935
3936static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3937 const struct nfs_server *server, kgid_t *gid,
3938 struct nfs4_string *group_name)
3939{
3940 uint32_t len;
3941 __be32 *p;
3942 int ret = 0;
3943
3944 *gid = make_kgid(&init_user_ns, -2);
3945 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3946 return -EIO;
3947 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3948 p = xdr_inline_decode(xdr, 4);
3949 if (unlikely(!p))
3950 goto out_overflow;
3951 len = be32_to_cpup(p);
3952 p = xdr_inline_decode(xdr, len);
3953 if (unlikely(!p))
3954 goto out_overflow;
3955 if (group_name != NULL) {
3956 group_name->data = kmemdup(p, len, GFP_NOWAIT);
3957 if (group_name->data != NULL) {
3958 group_name->len = len;
3959 ret = NFS_ATTR_FATTR_GROUP_NAME;
3960 }
3961 } else if (len < XDR_MAX_NETOBJ) {
3962 if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3963 ret = NFS_ATTR_FATTR_GROUP;
3964 else
3965 dprintk("%s: nfs_map_group_to_gid failed!\n",
3966 __func__);
3967 } else
3968 dprintk("%s: name too long (%u)!\n",
3969 __func__, len);
3970 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3971 }
3972 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3973 return ret;
3974out_overflow:
3975 print_overflow_msg(__func__, xdr);
3976 return -EIO;
3977}
3978
3979static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3980{
3981 uint32_t major = 0, minor = 0;
3982 __be32 *p;
3983 int ret = 0;
3984
3985 *rdev = MKDEV(0,0);
3986 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3987 return -EIO;
3988 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3989 dev_t tmp;
3990
3991 p = xdr_inline_decode(xdr, 8);
3992 if (unlikely(!p))
3993 goto out_overflow;
3994 major = be32_to_cpup(p++);
3995 minor = be32_to_cpup(p);
3996 tmp = MKDEV(major, minor);
3997 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3998 *rdev = tmp;
3999 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
4000 ret = NFS_ATTR_FATTR_RDEV;
4001 }
4002 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
4003 return ret;
4004out_overflow:
4005 print_overflow_msg(__func__, xdr);
4006 return -EIO;
4007}
4008
4009static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4010{
4011 __be32 *p;
4012 int status = 0;
4013
4014 *res = 0;
4015 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
4016 return -EIO;
4017 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
4018 p = xdr_inline_decode(xdr, 8);
4019 if (unlikely(!p))
4020 goto out_overflow;
4021 xdr_decode_hyper(p, res);
4022 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4023 }
4024 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4025 return status;
4026out_overflow:
4027 print_overflow_msg(__func__, xdr);
4028 return -EIO;
4029}
4030
4031static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4032{
4033 __be32 *p;
4034 int status = 0;
4035
4036 *res = 0;
4037 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4038 return -EIO;
4039 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4040 p = xdr_inline_decode(xdr, 8);
4041 if (unlikely(!p))
4042 goto out_overflow;
4043 xdr_decode_hyper(p, res);
4044 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4045 }
4046 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4047 return status;
4048out_overflow:
4049 print_overflow_msg(__func__, xdr);
4050 return -EIO;
4051}
4052
4053static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4054{
4055 __be32 *p;
4056 int status = 0;
4057
4058 *res = 0;
4059 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4060 return -EIO;
4061 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4062 p = xdr_inline_decode(xdr, 8);
4063 if (unlikely(!p))
4064 goto out_overflow;
4065 xdr_decode_hyper(p, res);
4066 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4067 }
4068 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4069 return status;
4070out_overflow:
4071 print_overflow_msg(__func__, xdr);
4072 return -EIO;
4073}
4074
4075static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4076{
4077 __be32 *p;
4078 int ret = 0;
4079
4080 *used = 0;
4081 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4082 return -EIO;
4083 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4084 p = xdr_inline_decode(xdr, 8);
4085 if (unlikely(!p))
4086 goto out_overflow;
4087 xdr_decode_hyper(p, used);
4088 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4089 ret = NFS_ATTR_FATTR_SPACE_USED;
4090 }
4091 dprintk("%s: space used=%Lu\n", __func__,
4092 (unsigned long long)*used);
4093 return ret;
4094out_overflow:
4095 print_overflow_msg(__func__, xdr);
4096 return -EIO;
4097}
4098
4099static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4100{
4101 __be32 *p;
4102 uint64_t sec;
4103 uint32_t nsec;
4104
4105 p = xdr_inline_decode(xdr, 12);
4106 if (unlikely(!p))
4107 goto out_overflow;
4108 p = xdr_decode_hyper(p, &sec);
4109 nsec = be32_to_cpup(p);
4110 time->tv_sec = (time_t)sec;
4111 time->tv_nsec = (long)nsec;
4112 return 0;
4113out_overflow:
4114 print_overflow_msg(__func__, xdr);
4115 return -EIO;
4116}
4117
4118static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4119{
4120 int status = 0;
4121
4122 time->tv_sec = 0;
4123 time->tv_nsec = 0;
4124 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4125 return -EIO;
4126 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4127 status = decode_attr_time(xdr, time);
4128 if (status == 0)
4129 status = NFS_ATTR_FATTR_ATIME;
4130 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4131 }
4132 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4133 return status;
4134}
4135
4136static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4137{
4138 int status = 0;
4139
4140 time->tv_sec = 0;
4141 time->tv_nsec = 0;
4142 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4143 return -EIO;
4144 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4145 status = decode_attr_time(xdr, time);
4146 if (status == 0)
4147 status = NFS_ATTR_FATTR_CTIME;
4148 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4149 }
4150 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4151 return status;
4152}
4153
4154static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4155 struct timespec *time)
4156{
4157 int status = 0;
4158
4159 time->tv_sec = 0;
4160 time->tv_nsec = 0;
4161 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4162 return -EIO;
4163 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4164 status = decode_attr_time(xdr, time);
4165 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4166 }
4167 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4168 (long)time->tv_nsec);
4169 return status;
4170}
4171
4172static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4173 struct nfs4_label *label)
4174{
4175 uint32_t pi = 0;
4176 uint32_t lfs = 0;
4177 __u32 len;
4178 __be32 *p;
4179 int status = 0;
4180
4181 if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4182 return -EIO;
4183 if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4184 p = xdr_inline_decode(xdr, 4);
4185 if (unlikely(!p))
4186 goto out_overflow;
4187 lfs = be32_to_cpup(p++);
4188 p = xdr_inline_decode(xdr, 4);
4189 if (unlikely(!p))
4190 goto out_overflow;
4191 pi = be32_to_cpup(p++);
4192 p = xdr_inline_decode(xdr, 4);
4193 if (unlikely(!p))
4194 goto out_overflow;
4195 len = be32_to_cpup(p++);
4196 p = xdr_inline_decode(xdr, len);
4197 if (unlikely(!p))
4198 goto out_overflow;
4199 if (len < NFS4_MAXLABELLEN) {
4200 if (label) {
4201 memcpy(label->label, p, len);
4202 label->len = len;
4203 label->pi = pi;
4204 label->lfs = lfs;
4205 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4206 }
4207 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4208 } else
4209 printk(KERN_WARNING "%s: label too long (%u)!\n",
4210 __func__, len);
4211 }
4212 if (label && label->label)
4213 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4214 (char *)label->label, label->len, label->pi, label->lfs);
4215 return status;
4216
4217out_overflow:
4218 print_overflow_msg(__func__, xdr);
4219 return -EIO;
4220}
4221
4222static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4223{
4224 int status = 0;
4225
4226 time->tv_sec = 0;
4227 time->tv_nsec = 0;
4228 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4229 return -EIO;
4230 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4231 status = decode_attr_time(xdr, time);
4232 if (status == 0)
4233 status = NFS_ATTR_FATTR_MTIME;
4234 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4235 }
4236 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4237 return status;
4238}
4239
4240static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4241{
4242 unsigned int attrwords = XDR_QUADLEN(attrlen);
4243 unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4244
4245 if (unlikely(attrwords != nwords)) {
4246 dprintk("%s: server returned incorrect attribute length: "
4247 "%u %c %u\n",
4248 __func__,
4249 attrwords << 2,
4250 (attrwords < nwords) ? '<' : '>',
4251 nwords << 2);
4252 return -EIO;
4253 }
4254 return 0;
4255}
4256
4257static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4258{
4259 __be32 *p;
4260
4261 p = xdr_inline_decode(xdr, 20);
4262 if (unlikely(!p))
4263 goto out_overflow;
4264 cinfo->atomic = be32_to_cpup(p++);
4265 p = xdr_decode_hyper(p, &cinfo->before);
4266 xdr_decode_hyper(p, &cinfo->after);
4267 return 0;
4268out_overflow:
4269 print_overflow_msg(__func__, xdr);
4270 return -EIO;
4271}
4272
4273static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4274{
4275 __be32 *p;
4276 uint32_t supp, acc;
4277 int status;
4278
4279 status = decode_op_hdr(xdr, OP_ACCESS);
4280 if (status)
4281 return status;
4282 p = xdr_inline_decode(xdr, 8);
4283 if (unlikely(!p))
4284 goto out_overflow;
4285 supp = be32_to_cpup(p++);
4286 acc = be32_to_cpup(p);
4287 *supported = supp;
4288 *access = acc;
4289 return 0;
4290out_overflow:
4291 print_overflow_msg(__func__, xdr);
4292 return -EIO;
4293}
4294
4295static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4296{
4297 __be32 *p;
4298
4299 p = xdr_inline_decode(xdr, len);
4300 if (likely(p)) {
4301 memcpy(buf, p, len);
4302 return 0;
4303 }
4304 print_overflow_msg(__func__, xdr);
4305 return -EIO;
4306}
4307
4308static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4309{
4310 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4311}
4312
4313static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4314{
4315 stateid->type = NFS4_OPEN_STATEID_TYPE;
4316 return decode_stateid(xdr, stateid);
4317}
4318
4319static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4320{
4321 stateid->type = NFS4_LOCK_STATEID_TYPE;
4322 return decode_stateid(xdr, stateid);
4323}
4324
4325static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4326{
4327 stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4328 return decode_stateid(xdr, stateid);
4329}
4330
4331static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4332{
4333 int status;
4334
4335 status = decode_op_hdr(xdr, OP_CLOSE);
4336 if (status != -EIO)
4337 nfs_increment_open_seqid(status, res->seqid);
4338 if (!status)
4339 status = decode_open_stateid(xdr, &res->stateid);
4340 return status;
4341}
4342
4343static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4344{
4345 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4346}
4347
4348static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4349{
4350 return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4351}
4352
4353static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4354{
4355 int status;
4356
4357 status = decode_op_hdr(xdr, OP_COMMIT);
4358 if (!status)
4359 status = decode_write_verifier(xdr, &res->verf->verifier);
4360 return status;
4361}
4362
4363static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4364{
4365 __be32 *p;
4366 uint32_t bmlen;
4367 int status;
4368
4369 status = decode_op_hdr(xdr, OP_CREATE);
4370 if (status)
4371 return status;
4372 if ((status = decode_change_info(xdr, cinfo)))
4373 return status;
4374 p = xdr_inline_decode(xdr, 4);
4375 if (unlikely(!p))
4376 goto out_overflow;
4377 bmlen = be32_to_cpup(p);
4378 p = xdr_inline_decode(xdr, bmlen << 2);
4379 if (likely(p))
4380 return 0;
4381out_overflow:
4382 print_overflow_msg(__func__, xdr);
4383 return -EIO;
4384}
4385
4386static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4387{
4388 unsigned int savep;
4389 uint32_t attrlen, bitmap[3] = {0};
4390 int status;
4391
4392 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4393 goto xdr_error;
4394 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4395 goto xdr_error;
4396 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4397 goto xdr_error;
4398 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4399 goto xdr_error;
4400 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4401 &res->fh_expire_type)) != 0)
4402 goto xdr_error;
4403 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4404 goto xdr_error;
4405 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4406 goto xdr_error;
4407 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4408 goto xdr_error;
4409 if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4410 res->exclcreat_bitmask)) != 0)
4411 goto xdr_error;
4412 status = verify_attr_len(xdr, savep, attrlen);
4413xdr_error:
4414 dprintk("%s: xdr returned %d!\n", __func__, -status);
4415 return status;
4416}
4417
4418static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4419{
4420 unsigned int savep;
4421 uint32_t attrlen, bitmap[3] = {0};
4422 int status;
4423
4424 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4425 goto xdr_error;
4426 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4427 goto xdr_error;
4428 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4429 goto xdr_error;
4430
4431 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4432 goto xdr_error;
4433 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4434 goto xdr_error;
4435 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4436 goto xdr_error;
4437
4438 status = -EIO;
4439 if (unlikely(bitmap[0]))
4440 goto xdr_error;
4441
4442 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4443 goto xdr_error;
4444 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4445 goto xdr_error;
4446 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4447 goto xdr_error;
4448
4449 status = verify_attr_len(xdr, savep, attrlen);
4450xdr_error:
4451 dprintk("%s: xdr returned %d!\n", __func__, -status);
4452 return status;
4453}
4454
4455static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4456{
4457 unsigned int savep;
4458 uint32_t attrlen, bitmap[3] = {0};
4459 int status;
4460
4461 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4462 goto xdr_error;
4463 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4464 goto xdr_error;
4465 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4466 goto xdr_error;
4467
4468 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4469 goto xdr_error;
4470 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4471 goto xdr_error;
4472
4473 status = verify_attr_len(xdr, savep, attrlen);
4474xdr_error:
4475 dprintk("%s: xdr returned %d!\n", __func__, -status);
4476 return status;
4477}
4478
4479static int decode_threshold_hint(struct xdr_stream *xdr,
4480 uint32_t *bitmap,
4481 uint64_t *res,
4482 uint32_t hint_bit)
4483{
4484 __be32 *p;
4485
4486 *res = 0;
4487 if (likely(bitmap[0] & hint_bit)) {
4488 p = xdr_inline_decode(xdr, 8);
4489 if (unlikely(!p))
4490 goto out_overflow;
4491 xdr_decode_hyper(p, res);
4492 }
4493 return 0;
4494out_overflow:
4495 print_overflow_msg(__func__, xdr);
4496 return -EIO;
4497}
4498
4499static int decode_first_threshold_item4(struct xdr_stream *xdr,
4500 struct nfs4_threshold *res)
4501{
4502 __be32 *p;
4503 unsigned int savep;
4504 uint32_t bitmap[3] = {0,}, attrlen;
4505 int status;
4506
4507 /* layout type */
4508 p = xdr_inline_decode(xdr, 4);
4509 if (unlikely(!p)) {
4510 print_overflow_msg(__func__, xdr);
4511 return -EIO;
4512 }
4513 res->l_type = be32_to_cpup(p);
4514
4515 /* thi_hintset bitmap */
4516 status = decode_attr_bitmap(xdr, bitmap);
4517 if (status < 0)
4518 goto xdr_error;
4519
4520 /* thi_hintlist length */
4521 status = decode_attr_length(xdr, &attrlen, &savep);
4522 if (status < 0)
4523 goto xdr_error;
4524 /* thi_hintlist */
4525 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4526 if (status < 0)
4527 goto xdr_error;
4528 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4529 if (status < 0)
4530 goto xdr_error;
4531 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4532 THRESHOLD_RD_IO);
4533 if (status < 0)
4534 goto xdr_error;
4535 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4536 THRESHOLD_WR_IO);
4537 if (status < 0)
4538 goto xdr_error;
4539
4540 status = verify_attr_len(xdr, savep, attrlen);
4541 res->bm = bitmap[0];
4542
4543 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4544 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4545 res->wr_io_sz);
4546xdr_error:
4547 dprintk("%s ret=%d!\n", __func__, status);
4548 return status;
4549}
4550
4551/*
4552 * Thresholds on pNFS direct I/O vrs MDS I/O
4553 */
4554static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4555 uint32_t *bitmap,
4556 struct nfs4_threshold *res)
4557{
4558 __be32 *p;
4559 int status = 0;
4560 uint32_t num;
4561
4562 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4563 return -EIO;
4564 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4565 /* Did the server return an unrequested attribute? */
4566 if (unlikely(res == NULL))
4567 return -EREMOTEIO;
4568 p = xdr_inline_decode(xdr, 4);
4569 if (unlikely(!p))
4570 goto out_overflow;
4571 num = be32_to_cpup(p);
4572 if (num == 0)
4573 return 0;
4574 if (num > 1)
4575 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4576 "drivers per filesystem not supported\n",
4577 __func__);
4578
4579 status = decode_first_threshold_item4(xdr, res);
4580 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4581 }
4582 return status;
4583out_overflow:
4584 print_overflow_msg(__func__, xdr);
4585 return -EIO;
4586}
4587
4588static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4589 struct nfs_fattr *fattr, struct nfs_fh *fh,
4590 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4591 const struct nfs_server *server)
4592{
4593 int status;
4594 umode_t fmode = 0;
4595 uint32_t type;
4596 int32_t err;
4597
4598 status = decode_attr_type(xdr, bitmap, &type);
4599 if (status < 0)
4600 goto xdr_error;
4601 fattr->mode = 0;
4602 if (status != 0) {
4603 fattr->mode |= nfs_type2fmt[type];
4604 fattr->valid |= status;
4605 }
4606
4607 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4608 if (status < 0)
4609 goto xdr_error;
4610 fattr->valid |= status;
4611
4612 status = decode_attr_size(xdr, bitmap, &fattr->size);
4613 if (status < 0)
4614 goto xdr_error;
4615 fattr->valid |= status;
4616
4617 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4618 if (status < 0)
4619 goto xdr_error;
4620 fattr->valid |= status;
4621
4622 err = 0;
4623 status = decode_attr_error(xdr, bitmap, &err);
4624 if (status < 0)
4625 goto xdr_error;
4626
4627 status = decode_attr_filehandle(xdr, bitmap, fh);
4628 if (status < 0)
4629 goto xdr_error;
4630
4631 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4632 if (status < 0)
4633 goto xdr_error;
4634 fattr->valid |= status;
4635
4636 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4637 if (status < 0)
4638 goto xdr_error;
4639 fattr->valid |= status;
4640
4641 status = -EIO;
4642 if (unlikely(bitmap[0]))
4643 goto xdr_error;
4644
4645 status = decode_attr_mode(xdr, bitmap, &fmode);
4646 if (status < 0)
4647 goto xdr_error;
4648 if (status != 0) {
4649 fattr->mode |= fmode;
4650 fattr->valid |= status;
4651 }
4652
4653 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4654 if (status < 0)
4655 goto xdr_error;
4656 fattr->valid |= status;
4657
4658 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4659 if (status < 0)
4660 goto xdr_error;
4661 fattr->valid |= status;
4662
4663 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4664 if (status < 0)
4665 goto xdr_error;
4666 fattr->valid |= status;
4667
4668 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4669 if (status < 0)
4670 goto xdr_error;
4671 fattr->valid |= status;
4672
4673 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4674 if (status < 0)
4675 goto xdr_error;
4676 fattr->valid |= status;
4677
4678 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4679 if (status < 0)
4680 goto xdr_error;
4681 fattr->valid |= status;
4682
4683 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4684 if (status < 0)
4685 goto xdr_error;
4686 fattr->valid |= status;
4687
4688 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4689 if (status < 0)
4690 goto xdr_error;
4691 fattr->valid |= status;
4692
4693 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4694 if (status < 0)
4695 goto xdr_error;
4696 fattr->valid |= status;
4697
4698 status = -EIO;
4699 if (unlikely(bitmap[1]))
4700 goto xdr_error;
4701
4702 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4703 if (status < 0)
4704 goto xdr_error;
4705
4706 if (label) {
4707 status = decode_attr_security_label(xdr, bitmap, label);
4708 if (status < 0)
4709 goto xdr_error;
4710 fattr->valid |= status;
4711 }
4712
4713xdr_error:
4714 dprintk("%s: xdr returned %d\n", __func__, -status);
4715 return status;
4716}
4717
4718static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4719 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4720 struct nfs4_label *label, const struct nfs_server *server)
4721{
4722 unsigned int savep;
4723 uint32_t attrlen,
4724 bitmap[3] = {0};
4725 int status;
4726
4727 status = decode_op_hdr(xdr, OP_GETATTR);
4728 if (status < 0)
4729 goto xdr_error;
4730
4731 status = decode_attr_bitmap(xdr, bitmap);
4732 if (status < 0)
4733 goto xdr_error;
4734
4735 status = decode_attr_length(xdr, &attrlen, &savep);
4736 if (status < 0)
4737 goto xdr_error;
4738
4739 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4740 label, server);
4741 if (status < 0)
4742 goto xdr_error;
4743
4744 status = verify_attr_len(xdr, savep, attrlen);
4745xdr_error:
4746 dprintk("%s: xdr returned %d\n", __func__, -status);
4747 return status;
4748}
4749
4750static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4751 struct nfs4_label *label, const struct nfs_server *server)
4752{
4753 return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4754}
4755
4756static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4757 const struct nfs_server *server)
4758{
4759 return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4760}
4761
4762/*
4763 * Decode potentially multiple layout types.
4764 */
4765static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4766 struct nfs_fsinfo *fsinfo)
4767{
4768 __be32 *p;
4769 uint32_t i;
4770
4771 p = xdr_inline_decode(xdr, 4);
4772 if (unlikely(!p))
4773 goto out_overflow;
4774 fsinfo->nlayouttypes = be32_to_cpup(p);
4775
4776 /* pNFS is not supported by the underlying file system */
4777 if (fsinfo->nlayouttypes == 0)
4778 return 0;
4779
4780 /* Decode and set first layout type, move xdr->p past unused types */
4781 p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4782 if (unlikely(!p))
4783 goto out_overflow;
4784
4785 /* If we get too many, then just cap it at the max */
4786 if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4787 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4788 __func__, fsinfo->nlayouttypes);
4789 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4790 }
4791
4792 for(i = 0; i < fsinfo->nlayouttypes; ++i)
4793 fsinfo->layouttype[i] = be32_to_cpup(p++);
4794 return 0;
4795out_overflow:
4796 print_overflow_msg(__func__, xdr);
4797 return -EIO;
4798}
4799
4800/*
4801 * The type of file system exported.
4802 * Note we must ensure that layouttype is set in any non-error case.
4803 */
4804static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4805 struct nfs_fsinfo *fsinfo)
4806{
4807 int status = 0;
4808
4809 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4810 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4811 return -EIO;
4812 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4813 status = decode_pnfs_layout_types(xdr, fsinfo);
4814 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4815 }
4816 return status;
4817}
4818
4819/*
4820 * The prefered block size for layout directed io
4821 */
4822static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4823 uint32_t *res)
4824{
4825 __be32 *p;
4826
4827 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4828 *res = 0;
4829 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4830 p = xdr_inline_decode(xdr, 4);
4831 if (unlikely(!p)) {
4832 print_overflow_msg(__func__, xdr);
4833 return -EIO;
4834 }
4835 *res = be32_to_cpup(p);
4836 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4837 }
4838 return 0;
4839}
4840
4841/*
4842 * The granularity of a CLONE operation.
4843 */
4844static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4845 uint32_t *res)
4846{
4847 __be32 *p;
4848
4849 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4850 *res = 0;
4851 if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4852 p = xdr_inline_decode(xdr, 4);
4853 if (unlikely(!p)) {
4854 print_overflow_msg(__func__, xdr);
4855 return -EIO;
4856 }
4857 *res = be32_to_cpup(p);
4858 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4859 }
4860 return 0;
4861}
4862
4863static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4864{
4865 unsigned int savep;
4866 uint32_t attrlen, bitmap[3];
4867 int status;
4868
4869 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4870 goto xdr_error;
4871 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4872 goto xdr_error;
4873 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4874 goto xdr_error;
4875
4876 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4877
4878 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4879 goto xdr_error;
4880 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4881 goto xdr_error;
4882 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4883 goto xdr_error;
4884 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4885 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4886 goto xdr_error;
4887 fsinfo->wtpref = fsinfo->wtmax;
4888
4889 status = -EIO;
4890 if (unlikely(bitmap[0]))
4891 goto xdr_error;
4892
4893 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4894 if (status != 0)
4895 goto xdr_error;
4896 status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4897 if (status != 0)
4898 goto xdr_error;
4899
4900 status = -EIO;
4901 if (unlikely(bitmap[1]))
4902 goto xdr_error;
4903
4904 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4905 if (status)
4906 goto xdr_error;
4907 status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4908 if (status)
4909 goto xdr_error;
4910
4911 status = verify_attr_len(xdr, savep, attrlen);
4912xdr_error:
4913 dprintk("%s: xdr returned %d!\n", __func__, -status);
4914 return status;
4915}
4916
4917static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4918{
4919 __be32 *p;
4920 uint32_t len;
4921 int status;
4922
4923 /* Zero handle first to allow comparisons */
4924 memset(fh, 0, sizeof(*fh));
4925
4926 status = decode_op_hdr(xdr, OP_GETFH);
4927 if (status)
4928 return status;
4929
4930 p = xdr_inline_decode(xdr, 4);
4931 if (unlikely(!p))
4932 goto out_overflow;
4933 len = be32_to_cpup(p);
4934 if (len > NFS4_FHSIZE)
4935 return -EIO;
4936 fh->size = len;
4937 p = xdr_inline_decode(xdr, len);
4938 if (unlikely(!p))
4939 goto out_overflow;
4940 memcpy(fh->data, p, len);
4941 return 0;
4942out_overflow:
4943 print_overflow_msg(__func__, xdr);
4944 return -EIO;
4945}
4946
4947static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4948{
4949 int status;
4950
4951 status = decode_op_hdr(xdr, OP_LINK);
4952 if (status)
4953 return status;
4954 return decode_change_info(xdr, cinfo);
4955}
4956
4957/*
4958 * We create the owner, so we know a proper owner.id length is 4.
4959 */
4960static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4961{
4962 uint64_t offset, length, clientid;
4963 __be32 *p;
4964 uint32_t namelen, type;
4965
4966 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4967 if (unlikely(!p))
4968 goto out_overflow;
4969 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4970 p = xdr_decode_hyper(p, &length);
4971 type = be32_to_cpup(p++); /* 4 byte read */
4972 if (fl != NULL) { /* manipulate file lock */
4973 fl->fl_start = (loff_t)offset;
4974 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4975 if (length == ~(uint64_t)0)
4976 fl->fl_end = OFFSET_MAX;
4977 fl->fl_type = F_WRLCK;
4978 if (type & 1)
4979 fl->fl_type = F_RDLCK;
4980 fl->fl_pid = 0;
4981 }
4982 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4983 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4984 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4985 if (likely(p))
4986 return -NFS4ERR_DENIED;
4987out_overflow:
4988 print_overflow_msg(__func__, xdr);
4989 return -EIO;
4990}
4991
4992static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4993{
4994 int status;
4995
4996 status = decode_op_hdr(xdr, OP_LOCK);
4997 if (status == -EIO)
4998 goto out;
4999 if (status == 0) {
5000 status = decode_lock_stateid(xdr, &res->stateid);
5001 if (unlikely(status))
5002 goto out;
5003 } else if (status == -NFS4ERR_DENIED)
5004 status = decode_lock_denied(xdr, NULL);
5005 if (res->open_seqid != NULL)
5006 nfs_increment_open_seqid(status, res->open_seqid);
5007 nfs_increment_lock_seqid(status, res->lock_seqid);
5008out:
5009 return status;
5010}
5011
5012static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
5013{
5014 int status;
5015 status = decode_op_hdr(xdr, OP_LOCKT);
5016 if (status == -NFS4ERR_DENIED)
5017 return decode_lock_denied(xdr, res->denied);
5018 return status;
5019}
5020
5021static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
5022{
5023 int status;
5024
5025 status = decode_op_hdr(xdr, OP_LOCKU);
5026 if (status != -EIO)
5027 nfs_increment_lock_seqid(status, res->seqid);
5028 if (status == 0)
5029 status = decode_lock_stateid(xdr, &res->stateid);
5030 return status;
5031}
5032
5033static int decode_release_lockowner(struct xdr_stream *xdr)
5034{
5035 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
5036}
5037
5038static int decode_lookup(struct xdr_stream *xdr)
5039{
5040 return decode_op_hdr(xdr, OP_LOOKUP);
5041}
5042
5043/* This is too sick! */
5044static int decode_space_limit(struct xdr_stream *xdr,
5045 unsigned long *pagemod_limit)
5046{
5047 __be32 *p;
5048 uint32_t limit_type, nblocks, blocksize;
5049 u64 maxsize = 0;
5050
5051 p = xdr_inline_decode(xdr, 12);
5052 if (unlikely(!p))
5053 goto out_overflow;
5054 limit_type = be32_to_cpup(p++);
5055 switch (limit_type) {
5056 case NFS4_LIMIT_SIZE:
5057 xdr_decode_hyper(p, &maxsize);
5058 break;
5059 case NFS4_LIMIT_BLOCKS:
5060 nblocks = be32_to_cpup(p++);
5061 blocksize = be32_to_cpup(p);
5062 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5063 }
5064 maxsize >>= PAGE_SHIFT;
5065 *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5066 return 0;
5067out_overflow:
5068 print_overflow_msg(__func__, xdr);
5069 return -EIO;
5070}
5071
5072static int decode_rw_delegation(struct xdr_stream *xdr,
5073 uint32_t delegation_type,
5074 struct nfs_openres *res)
5075{
5076 __be32 *p;
5077 int status;
5078
5079 status = decode_delegation_stateid(xdr, &res->delegation);
5080 if (unlikely(status))
5081 return status;
5082 p = xdr_inline_decode(xdr, 4);
5083 if (unlikely(!p))
5084 goto out_overflow;
5085 res->do_recall = be32_to_cpup(p);
5086
5087 switch (delegation_type) {
5088 case NFS4_OPEN_DELEGATE_READ:
5089 res->delegation_type = FMODE_READ;
5090 break;
5091 case NFS4_OPEN_DELEGATE_WRITE:
5092 res->delegation_type = FMODE_WRITE|FMODE_READ;
5093 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5094 return -EIO;
5095 }
5096 return decode_ace(xdr, NULL, res->server->nfs_client);
5097out_overflow:
5098 print_overflow_msg(__func__, xdr);
5099 return -EIO;
5100}
5101
5102static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5103{
5104 __be32 *p;
5105 uint32_t why_no_delegation;
5106
5107 p = xdr_inline_decode(xdr, 4);
5108 if (unlikely(!p))
5109 goto out_overflow;
5110 why_no_delegation = be32_to_cpup(p);
5111 switch (why_no_delegation) {
5112 case WND4_CONTENTION:
5113 case WND4_RESOURCE:
5114 xdr_inline_decode(xdr, 4);
5115 /* Ignore for now */
5116 }
5117 return 0;
5118out_overflow:
5119 print_overflow_msg(__func__, xdr);
5120 return -EIO;
5121}
5122
5123static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5124{
5125 __be32 *p;
5126 uint32_t delegation_type;
5127
5128 p = xdr_inline_decode(xdr, 4);
5129 if (unlikely(!p))
5130 goto out_overflow;
5131 delegation_type = be32_to_cpup(p);
5132 res->delegation_type = 0;
5133 switch (delegation_type) {
5134 case NFS4_OPEN_DELEGATE_NONE:
5135 return 0;
5136 case NFS4_OPEN_DELEGATE_READ:
5137 case NFS4_OPEN_DELEGATE_WRITE:
5138 return decode_rw_delegation(xdr, delegation_type, res);
5139 case NFS4_OPEN_DELEGATE_NONE_EXT:
5140 return decode_no_delegation(xdr, res);
5141 }
5142 return -EIO;
5143out_overflow:
5144 print_overflow_msg(__func__, xdr);
5145 return -EIO;
5146}
5147
5148static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5149{
5150 __be32 *p;
5151 uint32_t savewords, bmlen, i;
5152 int status;
5153
5154 if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5155 return status;
5156 nfs_increment_open_seqid(status, res->seqid);
5157 if (status)
5158 return status;
5159 status = decode_open_stateid(xdr, &res->stateid);
5160 if (unlikely(status))
5161 return status;
5162
5163 decode_change_info(xdr, &res->cinfo);
5164
5165 p = xdr_inline_decode(xdr, 8);
5166 if (unlikely(!p))
5167 goto out_overflow;
5168 res->rflags = be32_to_cpup(p++);
5169 bmlen = be32_to_cpup(p);
5170 if (bmlen > 10)
5171 goto xdr_error;
5172
5173 p = xdr_inline_decode(xdr, bmlen << 2);
5174 if (unlikely(!p))
5175 goto out_overflow;
5176 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5177 for (i = 0; i < savewords; ++i)
5178 res->attrset[i] = be32_to_cpup(p++);
5179 for (; i < NFS4_BITMAP_SIZE; i++)
5180 res->attrset[i] = 0;
5181
5182 return decode_delegation(xdr, res);
5183xdr_error:
5184 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5185 return -EIO;
5186out_overflow:
5187 print_overflow_msg(__func__, xdr);
5188 return -EIO;
5189}
5190
5191static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5192{
5193 int status;
5194
5195 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5196 if (status != -EIO)
5197 nfs_increment_open_seqid(status, res->seqid);
5198 if (!status)
5199 status = decode_open_stateid(xdr, &res->stateid);
5200 return status;
5201}
5202
5203static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5204{
5205 int status;
5206
5207 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5208 if (status != -EIO)
5209 nfs_increment_open_seqid(status, res->seqid);
5210 if (!status)
5211 status = decode_open_stateid(xdr, &res->stateid);
5212 return status;
5213}
5214
5215static int decode_putfh(struct xdr_stream *xdr)
5216{
5217 return decode_op_hdr(xdr, OP_PUTFH);
5218}
5219
5220static int decode_putrootfh(struct xdr_stream *xdr)
5221{
5222 return decode_op_hdr(xdr, OP_PUTROOTFH);
5223}
5224
5225static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5226 struct nfs_pgio_res *res)
5227{
5228 __be32 *p;
5229 uint32_t count, eof, recvd;
5230 int status;
5231
5232 status = decode_op_hdr(xdr, OP_READ);
5233 if (status)
5234 return status;
5235 p = xdr_inline_decode(xdr, 8);
5236 if (unlikely(!p))
5237 goto out_overflow;
5238 eof = be32_to_cpup(p++);
5239 count = be32_to_cpup(p);
5240 recvd = xdr_read_pages(xdr, count);
5241 if (count > recvd) {
5242 dprintk("NFS: server cheating in read reply: "
5243 "count %u > recvd %u\n", count, recvd);
5244 count = recvd;
5245 eof = 0;
5246 }
5247 res->eof = eof;
5248 res->count = count;
5249 return 0;
5250out_overflow:
5251 print_overflow_msg(__func__, xdr);
5252 return -EIO;
5253}
5254
5255static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5256{
5257 int status;
5258 __be32 verf[2];
5259
5260 status = decode_op_hdr(xdr, OP_READDIR);
5261 if (!status)
5262 status = decode_verifier(xdr, readdir->verifier.data);
5263 if (unlikely(status))
5264 return status;
5265 memcpy(verf, readdir->verifier.data, sizeof(verf));
5266 dprintk("%s: verifier = %08x:%08x\n",
5267 __func__, verf[0], verf[1]);
5268 return xdr_read_pages(xdr, xdr->buf->page_len);
5269}
5270
5271static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5272{
5273 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5274 u32 len, recvd;
5275 __be32 *p;
5276 int status;
5277
5278 status = decode_op_hdr(xdr, OP_READLINK);
5279 if (status)
5280 return status;
5281
5282 /* Convert length of symlink */
5283 p = xdr_inline_decode(xdr, 4);
5284 if (unlikely(!p))
5285 goto out_overflow;
5286 len = be32_to_cpup(p);
5287 if (len >= rcvbuf->page_len || len <= 0) {
5288 dprintk("nfs: server returned giant symlink!\n");
5289 return -ENAMETOOLONG;
5290 }
5291 recvd = xdr_read_pages(xdr, len);
5292 if (recvd < len) {
5293 dprintk("NFS: server cheating in readlink reply: "
5294 "count %u > recvd %u\n", len, recvd);
5295 return -EIO;
5296 }
5297 /*
5298 * The XDR encode routine has set things up so that
5299 * the link text will be copied directly into the
5300 * buffer. We just have to do overflow-checking,
5301 * and and null-terminate the text (the VFS expects
5302 * null-termination).
5303 */
5304 xdr_terminate_string(rcvbuf, len);
5305 return 0;
5306out_overflow:
5307 print_overflow_msg(__func__, xdr);
5308 return -EIO;
5309}
5310
5311static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5312{
5313 int status;
5314
5315 status = decode_op_hdr(xdr, OP_REMOVE);
5316 if (status)
5317 goto out;
5318 status = decode_change_info(xdr, cinfo);
5319out:
5320 return status;
5321}
5322
5323static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5324 struct nfs4_change_info *new_cinfo)
5325{
5326 int status;
5327
5328 status = decode_op_hdr(xdr, OP_RENAME);
5329 if (status)
5330 goto out;
5331 if ((status = decode_change_info(xdr, old_cinfo)))
5332 goto out;
5333 status = decode_change_info(xdr, new_cinfo);
5334out:
5335 return status;
5336}
5337
5338static int decode_renew(struct xdr_stream *xdr)
5339{
5340 return decode_op_hdr(xdr, OP_RENEW);
5341}
5342
5343static int
5344decode_restorefh(struct xdr_stream *xdr)
5345{
5346 return decode_op_hdr(xdr, OP_RESTOREFH);
5347}
5348
5349static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5350 struct nfs_getaclres *res)
5351{
5352 unsigned int savep;
5353 uint32_t attrlen,
5354 bitmap[3] = {0};
5355 int status;
5356 unsigned int pg_offset;
5357
5358 res->acl_len = 0;
5359 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5360 goto out;
5361
5362 xdr_enter_page(xdr, xdr->buf->page_len);
5363
5364 /* Calculate the offset of the page data */
5365 pg_offset = xdr->buf->head[0].iov_len;
5366
5367 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5368 goto out;
5369 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5370 goto out;
5371
5372 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5373 return -EIO;
5374 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5375
5376 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5377 * are stored with the acl data to handle the problem of
5378 * variable length bitmaps.*/
5379 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5380 res->acl_len = attrlen;
5381
5382 /* Check for receive buffer overflow */
5383 if (res->acl_len > (xdr->nwords << 2) ||
5384 res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5385 res->acl_flags |= NFS4_ACL_TRUNC;
5386 dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5387 attrlen, xdr->nwords << 2);
5388 }
5389 } else
5390 status = -EOPNOTSUPP;
5391
5392out:
5393 return status;
5394}
5395
5396static int
5397decode_savefh(struct xdr_stream *xdr)
5398{
5399 return decode_op_hdr(xdr, OP_SAVEFH);
5400}
5401
5402static int decode_setattr(struct xdr_stream *xdr)
5403{
5404 __be32 *p;
5405 uint32_t bmlen;
5406 int status;
5407
5408 status = decode_op_hdr(xdr, OP_SETATTR);
5409 if (status)
5410 return status;
5411 p = xdr_inline_decode(xdr, 4);
5412 if (unlikely(!p))
5413 goto out_overflow;
5414 bmlen = be32_to_cpup(p);
5415 p = xdr_inline_decode(xdr, bmlen << 2);
5416 if (likely(p))
5417 return 0;
5418out_overflow:
5419 print_overflow_msg(__func__, xdr);
5420 return -EIO;
5421}
5422
5423static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5424{
5425 __be32 *p;
5426 uint32_t opnum;
5427 int32_t nfserr;
5428
5429 p = xdr_inline_decode(xdr, 8);
5430 if (unlikely(!p))
5431 goto out_overflow;
5432 opnum = be32_to_cpup(p++);
5433 if (opnum != OP_SETCLIENTID) {
5434 dprintk("nfs: decode_setclientid: Server returned operation"
5435 " %d\n", opnum);
5436 return -EIO;
5437 }
5438 nfserr = be32_to_cpup(p);
5439 if (nfserr == NFS_OK) {
5440 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5441 if (unlikely(!p))
5442 goto out_overflow;
5443 p = xdr_decode_hyper(p, &res->clientid);
5444 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5445 } else if (nfserr == NFSERR_CLID_INUSE) {
5446 uint32_t len;
5447
5448 /* skip netid string */
5449 p = xdr_inline_decode(xdr, 4);
5450 if (unlikely(!p))
5451 goto out_overflow;
5452 len = be32_to_cpup(p);
5453 p = xdr_inline_decode(xdr, len);
5454 if (unlikely(!p))
5455 goto out_overflow;
5456
5457 /* skip uaddr string */
5458 p = xdr_inline_decode(xdr, 4);
5459 if (unlikely(!p))
5460 goto out_overflow;
5461 len = be32_to_cpup(p);
5462 p = xdr_inline_decode(xdr, len);
5463 if (unlikely(!p))
5464 goto out_overflow;
5465 return -NFSERR_CLID_INUSE;
5466 } else
5467 return nfs4_stat_to_errno(nfserr);
5468
5469 return 0;
5470out_overflow:
5471 print_overflow_msg(__func__, xdr);
5472 return -EIO;
5473}
5474
5475static int decode_setclientid_confirm(struct xdr_stream *xdr)
5476{
5477 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5478}
5479
5480static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5481{
5482 __be32 *p;
5483 int status;
5484
5485 status = decode_op_hdr(xdr, OP_WRITE);
5486 if (status)
5487 return status;
5488
5489 p = xdr_inline_decode(xdr, 8);
5490 if (unlikely(!p))
5491 goto out_overflow;
5492 res->count = be32_to_cpup(p++);
5493 res->verf->committed = be32_to_cpup(p++);
5494 return decode_write_verifier(xdr, &res->verf->verifier);
5495out_overflow:
5496 print_overflow_msg(__func__, xdr);
5497 return -EIO;
5498}
5499
5500static int decode_delegreturn(struct xdr_stream *xdr)
5501{
5502 return decode_op_hdr(xdr, OP_DELEGRETURN);
5503}
5504
5505static int decode_secinfo_gss(struct xdr_stream *xdr,
5506 struct nfs4_secinfo4 *flavor)
5507{
5508 u32 oid_len;
5509 __be32 *p;
5510
5511 p = xdr_inline_decode(xdr, 4);
5512 if (unlikely(!p))
5513 goto out_overflow;
5514 oid_len = be32_to_cpup(p);
5515 if (oid_len > GSS_OID_MAX_LEN)
5516 goto out_err;
5517
5518 p = xdr_inline_decode(xdr, oid_len);
5519 if (unlikely(!p))
5520 goto out_overflow;
5521 memcpy(flavor->flavor_info.oid.data, p, oid_len);
5522 flavor->flavor_info.oid.len = oid_len;
5523
5524 p = xdr_inline_decode(xdr, 8);
5525 if (unlikely(!p))
5526 goto out_overflow;
5527 flavor->flavor_info.qop = be32_to_cpup(p++);
5528 flavor->flavor_info.service = be32_to_cpup(p);
5529
5530 return 0;
5531
5532out_overflow:
5533 print_overflow_msg(__func__, xdr);
5534 return -EIO;
5535out_err:
5536 return -EINVAL;
5537}
5538
5539static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5540{
5541 struct nfs4_secinfo4 *sec_flavor;
5542 unsigned int i, num_flavors;
5543 int status;
5544 __be32 *p;
5545
5546 p = xdr_inline_decode(xdr, 4);
5547 if (unlikely(!p))
5548 goto out_overflow;
5549
5550 res->flavors->num_flavors = 0;
5551 num_flavors = be32_to_cpup(p);
5552
5553 for (i = 0; i < num_flavors; i++) {
5554 sec_flavor = &res->flavors->flavors[i];
5555 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5556 break;
5557
5558 p = xdr_inline_decode(xdr, 4);
5559 if (unlikely(!p))
5560 goto out_overflow;
5561 sec_flavor->flavor = be32_to_cpup(p);
5562
5563 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5564 status = decode_secinfo_gss(xdr, sec_flavor);
5565 if (status)
5566 goto out;
5567 }
5568 res->flavors->num_flavors++;
5569 }
5570
5571 status = 0;
5572out:
5573 return status;
5574out_overflow:
5575 print_overflow_msg(__func__, xdr);
5576 return -EIO;
5577}
5578
5579static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5580{
5581 int status = decode_op_hdr(xdr, OP_SECINFO);
5582 if (status)
5583 return status;
5584 return decode_secinfo_common(xdr, res);
5585}
5586
5587#if defined(CONFIG_NFS_V4_1)
5588static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5589{
5590 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5591 if (status)
5592 return status;
5593 return decode_secinfo_common(xdr, res);
5594}
5595
5596static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5597{
5598 __be32 *p;
5599 uint32_t bitmap_words;
5600 unsigned int i;
5601
5602 p = xdr_inline_decode(xdr, 4);
5603 bitmap_words = be32_to_cpup(p++);
5604 if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5605 return -EIO;
5606 p = xdr_inline_decode(xdr, 4 * bitmap_words);
5607 for (i = 0; i < bitmap_words; i++)
5608 op_map->u.words[i] = be32_to_cpup(p++);
5609
5610 return 0;
5611}
5612
5613static int decode_exchange_id(struct xdr_stream *xdr,
5614 struct nfs41_exchange_id_res *res)
5615{
5616 __be32 *p;
5617 uint32_t dummy;
5618 char *dummy_str;
5619 int status;
5620 uint32_t impl_id_count;
5621
5622 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5623 if (status)
5624 return status;
5625
5626 p = xdr_inline_decode(xdr, 8);
5627 if (unlikely(!p))
5628 goto out_overflow;
5629 xdr_decode_hyper(p, &res->clientid);
5630 p = xdr_inline_decode(xdr, 12);
5631 if (unlikely(!p))
5632 goto out_overflow;
5633 res->seqid = be32_to_cpup(p++);
5634 res->flags = be32_to_cpup(p++);
5635
5636 res->state_protect.how = be32_to_cpup(p);
5637 switch (res->state_protect.how) {
5638 case SP4_NONE:
5639 break;
5640 case SP4_MACH_CRED:
5641 status = decode_op_map(xdr, &res->state_protect.enforce);
5642 if (status)
5643 return status;
5644 status = decode_op_map(xdr, &res->state_protect.allow);
5645 if (status)
5646 return status;
5647 break;
5648 default:
5649 WARN_ON_ONCE(1);
5650 return -EIO;
5651 }
5652
5653 /* server_owner4.so_minor_id */
5654 p = xdr_inline_decode(xdr, 8);
5655 if (unlikely(!p))
5656 goto out_overflow;
5657 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5658
5659 /* server_owner4.so_major_id */
5660 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5661 if (unlikely(status))
5662 return status;
5663 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5664 return -EIO;
5665 memcpy(res->server_owner->major_id, dummy_str, dummy);
5666 res->server_owner->major_id_sz = dummy;
5667
5668 /* server_scope4 */
5669 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5670 if (unlikely(status))
5671 return status;
5672 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5673 return -EIO;
5674 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5675 res->server_scope->server_scope_sz = dummy;
5676
5677 /* Implementation Id */
5678 p = xdr_inline_decode(xdr, 4);
5679 if (unlikely(!p))
5680 goto out_overflow;
5681 impl_id_count = be32_to_cpup(p++);
5682
5683 if (impl_id_count) {
5684 /* nii_domain */
5685 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5686 if (unlikely(status))
5687 return status;
5688 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5689 return -EIO;
5690 memcpy(res->impl_id->domain, dummy_str, dummy);
5691
5692 /* nii_name */
5693 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5694 if (unlikely(status))
5695 return status;
5696 if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
5697 return -EIO;
5698 memcpy(res->impl_id->name, dummy_str, dummy);
5699
5700 /* nii_date */
5701 p = xdr_inline_decode(xdr, 12);
5702 if (unlikely(!p))
5703 goto out_overflow;
5704 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5705 res->impl_id->date.nseconds = be32_to_cpup(p);
5706
5707 /* if there's more than one entry, ignore the rest */
5708 }
5709 return 0;
5710out_overflow:
5711 print_overflow_msg(__func__, xdr);
5712 return -EIO;
5713}
5714
5715static int decode_chan_attrs(struct xdr_stream *xdr,
5716 struct nfs4_channel_attrs *attrs)
5717{
5718 __be32 *p;
5719 u32 nr_attrs, val;
5720
5721 p = xdr_inline_decode(xdr, 28);
5722 if (unlikely(!p))
5723 goto out_overflow;
5724 val = be32_to_cpup(p++); /* headerpadsz */
5725 if (val)
5726 return -EINVAL; /* no support for header padding yet */
5727 attrs->max_rqst_sz = be32_to_cpup(p++);
5728 attrs->max_resp_sz = be32_to_cpup(p++);
5729 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5730 attrs->max_ops = be32_to_cpup(p++);
5731 attrs->max_reqs = be32_to_cpup(p++);
5732 nr_attrs = be32_to_cpup(p);
5733 if (unlikely(nr_attrs > 1)) {
5734 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5735 "count %u\n", __func__, nr_attrs);
5736 return -EINVAL;
5737 }
5738 if (nr_attrs == 1) {
5739 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5740 if (unlikely(!p))
5741 goto out_overflow;
5742 }
5743 return 0;
5744out_overflow:
5745 print_overflow_msg(__func__, xdr);
5746 return -EIO;
5747}
5748
5749static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5750{
5751 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5752}
5753
5754static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5755 struct nfs41_bind_conn_to_session_res *res)
5756{
5757 __be32 *p;
5758 int status;
5759
5760 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5761 if (!status)
5762 status = decode_sessionid(xdr, &res->sessionid);
5763 if (unlikely(status))
5764 return status;
5765
5766 /* dir flags, rdma mode bool */
5767 p = xdr_inline_decode(xdr, 8);
5768 if (unlikely(!p))
5769 goto out_overflow;
5770
5771 res->dir = be32_to_cpup(p++);
5772 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5773 return -EIO;
5774 if (be32_to_cpup(p) == 0)
5775 res->use_conn_in_rdma_mode = false;
5776 else
5777 res->use_conn_in_rdma_mode = true;
5778
5779 return 0;
5780out_overflow:
5781 print_overflow_msg(__func__, xdr);
5782 return -EIO;
5783}
5784
5785static int decode_create_session(struct xdr_stream *xdr,
5786 struct nfs41_create_session_res *res)
5787{
5788 __be32 *p;
5789 int status;
5790
5791 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5792 if (!status)
5793 status = decode_sessionid(xdr, &res->sessionid);
5794 if (unlikely(status))
5795 return status;
5796
5797 /* seqid, flags */
5798 p = xdr_inline_decode(xdr, 8);
5799 if (unlikely(!p))
5800 goto out_overflow;
5801 res->seqid = be32_to_cpup(p++);
5802 res->flags = be32_to_cpup(p);
5803
5804 /* Channel attributes */
5805 status = decode_chan_attrs(xdr, &res->fc_attrs);
5806 if (!status)
5807 status = decode_chan_attrs(xdr, &res->bc_attrs);
5808 return status;
5809out_overflow:
5810 print_overflow_msg(__func__, xdr);
5811 return -EIO;
5812}
5813
5814static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5815{
5816 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5817}
5818
5819static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5820{
5821 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5822}
5823
5824static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5825{
5826 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5827}
5828#endif /* CONFIG_NFS_V4_1 */
5829
5830static int decode_sequence(struct xdr_stream *xdr,
5831 struct nfs4_sequence_res *res,
5832 struct rpc_rqst *rqstp)
5833{
5834#if defined(CONFIG_NFS_V4_1)
5835 struct nfs4_session *session;
5836 struct nfs4_sessionid id;
5837 u32 dummy;
5838 int status;
5839 __be32 *p;
5840
5841 if (res->sr_slot == NULL)
5842 return 0;
5843 if (!res->sr_slot->table->session)
5844 return 0;
5845
5846 status = decode_op_hdr(xdr, OP_SEQUENCE);
5847 if (!status)
5848 status = decode_sessionid(xdr, &id);
5849 if (unlikely(status))
5850 goto out_err;
5851
5852 /*
5853 * If the server returns different values for sessionID, slotID or
5854 * sequence number, the server is looney tunes.
5855 */
5856 status = -EREMOTEIO;
5857 session = res->sr_slot->table->session;
5858
5859 if (memcmp(id.data, session->sess_id.data,
5860 NFS4_MAX_SESSIONID_LEN)) {
5861 dprintk("%s Invalid session id\n", __func__);
5862 goto out_err;
5863 }
5864
5865 p = xdr_inline_decode(xdr, 20);
5866 if (unlikely(!p))
5867 goto out_overflow;
5868
5869 /* seqid */
5870 dummy = be32_to_cpup(p++);
5871 if (dummy != res->sr_slot->seq_nr) {
5872 dprintk("%s Invalid sequence number\n", __func__);
5873 goto out_err;
5874 }
5875 /* slot id */
5876 dummy = be32_to_cpup(p++);
5877 if (dummy != res->sr_slot->slot_nr) {
5878 dprintk("%s Invalid slot id\n", __func__);
5879 goto out_err;
5880 }
5881 /* highest slot id */
5882 res->sr_highest_slotid = be32_to_cpup(p++);
5883 /* target highest slot id */
5884 res->sr_target_highest_slotid = be32_to_cpup(p++);
5885 /* result flags */
5886 res->sr_status_flags = be32_to_cpup(p);
5887 status = 0;
5888out_err:
5889 res->sr_status = status;
5890 return status;
5891out_overflow:
5892 print_overflow_msg(__func__, xdr);
5893 status = -EIO;
5894 goto out_err;
5895#else /* CONFIG_NFS_V4_1 */
5896 return 0;
5897#endif /* CONFIG_NFS_V4_1 */
5898}
5899
5900#if defined(CONFIG_NFS_V4_1)
5901static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5902{
5903 stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5904 return decode_stateid(xdr, stateid);
5905}
5906
5907static int decode_getdeviceinfo(struct xdr_stream *xdr,
5908 struct nfs4_getdeviceinfo_res *res)
5909{
5910 struct pnfs_device *pdev = res->pdev;
5911 __be32 *p;
5912 uint32_t len, type;
5913 int status;
5914
5915 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5916 if (status) {
5917 if (status == -ETOOSMALL) {
5918 p = xdr_inline_decode(xdr, 4);
5919 if (unlikely(!p))
5920 goto out_overflow;
5921 pdev->mincount = be32_to_cpup(p);
5922 dprintk("%s: Min count too small. mincnt = %u\n",
5923 __func__, pdev->mincount);
5924 }
5925 return status;
5926 }
5927
5928 p = xdr_inline_decode(xdr, 8);
5929 if (unlikely(!p))
5930 goto out_overflow;
5931 type = be32_to_cpup(p++);
5932 if (type != pdev->layout_type) {
5933 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5934 __func__, pdev->layout_type, type);
5935 return -EINVAL;
5936 }
5937 /*
5938 * Get the length of the opaque device_addr4. xdr_read_pages places
5939 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5940 * and places the remaining xdr data in xdr_buf->tail
5941 */
5942 pdev->mincount = be32_to_cpup(p);
5943 if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5944 goto out_overflow;
5945
5946 /* Parse notification bitmap, verifying that it is zero. */
5947 p = xdr_inline_decode(xdr, 4);
5948 if (unlikely(!p))
5949 goto out_overflow;
5950 len = be32_to_cpup(p);
5951 if (len) {
5952 uint32_t i;
5953
5954 p = xdr_inline_decode(xdr, 4 * len);
5955 if (unlikely(!p))
5956 goto out_overflow;
5957
5958 res->notification = be32_to_cpup(p++);
5959 for (i = 1; i < len; i++) {
5960 if (be32_to_cpup(p++)) {
5961 dprintk("%s: unsupported notification\n",
5962 __func__);
5963 return -EIO;
5964 }
5965 }
5966 }
5967 return 0;
5968out_overflow:
5969 print_overflow_msg(__func__, xdr);
5970 return -EIO;
5971}
5972
5973static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5974 struct nfs4_layoutget_res *res)
5975{
5976 __be32 *p;
5977 int status;
5978 u32 layout_count;
5979 u32 recvd;
5980
5981 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5982 if (status)
5983 return status;
5984 p = xdr_inline_decode(xdr, 4);
5985 if (unlikely(!p))
5986 goto out_overflow;
5987 res->return_on_close = be32_to_cpup(p);
5988 decode_layout_stateid(xdr, &res->stateid);
5989 p = xdr_inline_decode(xdr, 4);
5990 if (unlikely(!p))
5991 goto out_overflow;
5992 layout_count = be32_to_cpup(p);
5993 if (!layout_count) {
5994 dprintk("%s: server responded with empty layout array\n",
5995 __func__);
5996 return -EINVAL;
5997 }
5998
5999 p = xdr_inline_decode(xdr, 28);
6000 if (unlikely(!p))
6001 goto out_overflow;
6002 p = xdr_decode_hyper(p, &res->range.offset);
6003 p = xdr_decode_hyper(p, &res->range.length);
6004 res->range.iomode = be32_to_cpup(p++);
6005 res->type = be32_to_cpup(p++);
6006 res->layoutp->len = be32_to_cpup(p);
6007
6008 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
6009 __func__,
6010 (unsigned long)res->range.offset,
6011 (unsigned long)res->range.length,
6012 res->range.iomode,
6013 res->type,
6014 res->layoutp->len);
6015
6016 recvd = xdr_read_pages(xdr, res->layoutp->len);
6017 if (res->layoutp->len > recvd) {
6018 dprintk("NFS: server cheating in layoutget reply: "
6019 "layout len %u > recvd %u\n",
6020 res->layoutp->len, recvd);
6021 return -EINVAL;
6022 }
6023
6024 if (layout_count > 1) {
6025 /* We only handle a length one array at the moment. Any
6026 * further entries are just ignored. Note that this means
6027 * the client may see a response that is less than the
6028 * minimum it requested.
6029 */
6030 dprintk("%s: server responded with %d layouts, dropping tail\n",
6031 __func__, layout_count);
6032 }
6033
6034 return 0;
6035out_overflow:
6036 print_overflow_msg(__func__, xdr);
6037 return -EIO;
6038}
6039
6040static int decode_layoutreturn(struct xdr_stream *xdr,
6041 struct nfs4_layoutreturn_res *res)
6042{
6043 __be32 *p;
6044 int status;
6045
6046 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
6047 if (status)
6048 return status;
6049 p = xdr_inline_decode(xdr, 4);
6050 if (unlikely(!p))
6051 goto out_overflow;
6052 res->lrs_present = be32_to_cpup(p);
6053 if (res->lrs_present)
6054 status = decode_layout_stateid(xdr, &res->stateid);
6055 return status;
6056out_overflow:
6057 print_overflow_msg(__func__, xdr);
6058 return -EIO;
6059}
6060
6061static int decode_layoutcommit(struct xdr_stream *xdr,
6062 struct rpc_rqst *req,
6063 struct nfs4_layoutcommit_res *res)
6064{
6065 __be32 *p;
6066 __u32 sizechanged;
6067 int status;
6068
6069 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
6070 res->status = status;
6071 if (status)
6072 return status;
6073
6074 p = xdr_inline_decode(xdr, 4);
6075 if (unlikely(!p))
6076 goto out_overflow;
6077 sizechanged = be32_to_cpup(p);
6078
6079 if (sizechanged) {
6080 /* throw away new size */
6081 p = xdr_inline_decode(xdr, 8);
6082 if (unlikely(!p))
6083 goto out_overflow;
6084 }
6085 return 0;
6086out_overflow:
6087 print_overflow_msg(__func__, xdr);
6088 return -EIO;
6089}
6090
6091static int decode_test_stateid(struct xdr_stream *xdr,
6092 struct nfs41_test_stateid_res *res)
6093{
6094 __be32 *p;
6095 int status;
6096 int num_res;
6097
6098 status = decode_op_hdr(xdr, OP_TEST_STATEID);
6099 if (status)
6100 return status;
6101
6102 p = xdr_inline_decode(xdr, 4);
6103 if (unlikely(!p))
6104 goto out_overflow;
6105 num_res = be32_to_cpup(p++);
6106 if (num_res != 1)
6107 goto out;
6108
6109 p = xdr_inline_decode(xdr, 4);
6110 if (unlikely(!p))
6111 goto out_overflow;
6112 res->status = be32_to_cpup(p++);
6113
6114 return status;
6115out_overflow:
6116 print_overflow_msg(__func__, xdr);
6117out:
6118 return -EIO;
6119}
6120
6121static int decode_free_stateid(struct xdr_stream *xdr,
6122 struct nfs41_free_stateid_res *res)
6123{
6124 res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6125 return res->status;
6126}
6127#else
6128static inline
6129int decode_layoutreturn(struct xdr_stream *xdr,
6130 struct nfs4_layoutreturn_res *res)
6131{
6132 return 0;
6133}
6134#endif /* CONFIG_NFS_V4_1 */
6135
6136/*
6137 * END OF "GENERIC" DECODE ROUTINES.
6138 */
6139
6140/*
6141 * Decode OPEN_DOWNGRADE response
6142 */
6143static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6144 struct xdr_stream *xdr,
6145 struct nfs_closeres *res)
6146{
6147 struct compound_hdr hdr;
6148 int status;
6149
6150 status = decode_compound_hdr(xdr, &hdr);
6151 if (status)
6152 goto out;
6153 status = decode_sequence(xdr, &res->seq_res, rqstp);
6154 if (status)
6155 goto out;
6156 status = decode_putfh(xdr);
6157 if (status)
6158 goto out;
6159 if (res->lr_res) {
6160 status = decode_layoutreturn(xdr, res->lr_res);
6161 res->lr_ret = status;
6162 if (status)
6163 goto out;
6164 }
6165 status = decode_open_downgrade(xdr, res);
6166out:
6167 return status;
6168}
6169
6170/*
6171 * Decode ACCESS response
6172 */
6173static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6174 struct nfs4_accessres *res)
6175{
6176 struct compound_hdr hdr;
6177 int status;
6178
6179 status = decode_compound_hdr(xdr, &hdr);
6180 if (status)
6181 goto out;
6182 status = decode_sequence(xdr, &res->seq_res, rqstp);
6183 if (status)
6184 goto out;
6185 status = decode_putfh(xdr);
6186 if (status != 0)
6187 goto out;
6188 status = decode_access(xdr, &res->supported, &res->access);
6189 if (status != 0)
6190 goto out;
6191 decode_getfattr(xdr, res->fattr, res->server);
6192out:
6193 return status;
6194}
6195
6196/*
6197 * Decode LOOKUP response
6198 */
6199static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6200 struct nfs4_lookup_res *res)
6201{
6202 struct compound_hdr hdr;
6203 int status;
6204
6205 status = decode_compound_hdr(xdr, &hdr);
6206 if (status)
6207 goto out;
6208 status = decode_sequence(xdr, &res->seq_res, rqstp);
6209 if (status)
6210 goto out;
6211 status = decode_putfh(xdr);
6212 if (status)
6213 goto out;
6214 status = decode_lookup(xdr);
6215 if (status)
6216 goto out;
6217 status = decode_getfh(xdr, res->fh);
6218 if (status)
6219 goto out;
6220 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6221out:
6222 return status;
6223}
6224
6225/*
6226 * Decode LOOKUP_ROOT response
6227 */
6228static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6229 struct xdr_stream *xdr,
6230 struct nfs4_lookup_res *res)
6231{
6232 struct compound_hdr hdr;
6233 int status;
6234
6235 status = decode_compound_hdr(xdr, &hdr);
6236 if (status)
6237 goto out;
6238 status = decode_sequence(xdr, &res->seq_res, rqstp);
6239 if (status)
6240 goto out;
6241 status = decode_putrootfh(xdr);
6242 if (status)
6243 goto out;
6244 status = decode_getfh(xdr, res->fh);
6245 if (status == 0)
6246 status = decode_getfattr_label(xdr, res->fattr,
6247 res->label, res->server);
6248out:
6249 return status;
6250}
6251
6252/*
6253 * Decode REMOVE response
6254 */
6255static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6256 struct nfs_removeres *res)
6257{
6258 struct compound_hdr hdr;
6259 int status;
6260
6261 status = decode_compound_hdr(xdr, &hdr);
6262 if (status)
6263 goto out;
6264 status = decode_sequence(xdr, &res->seq_res, rqstp);
6265 if (status)
6266 goto out;
6267 status = decode_putfh(xdr);
6268 if (status)
6269 goto out;
6270 status = decode_remove(xdr, &res->cinfo);
6271out:
6272 return status;
6273}
6274
6275/*
6276 * Decode RENAME response
6277 */
6278static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6279 struct nfs_renameres *res)
6280{
6281 struct compound_hdr hdr;
6282 int status;
6283
6284 status = decode_compound_hdr(xdr, &hdr);
6285 if (status)
6286 goto out;
6287 status = decode_sequence(xdr, &res->seq_res, rqstp);
6288 if (status)
6289 goto out;
6290 status = decode_putfh(xdr);
6291 if (status)
6292 goto out;
6293 status = decode_savefh(xdr);
6294 if (status)
6295 goto out;
6296 status = decode_putfh(xdr);
6297 if (status)
6298 goto out;
6299 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6300out:
6301 return status;
6302}
6303
6304/*
6305 * Decode LINK response
6306 */
6307static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6308 struct nfs4_link_res *res)
6309{
6310 struct compound_hdr hdr;
6311 int status;
6312
6313 status = decode_compound_hdr(xdr, &hdr);
6314 if (status)
6315 goto out;
6316 status = decode_sequence(xdr, &res->seq_res, rqstp);
6317 if (status)
6318 goto out;
6319 status = decode_putfh(xdr);
6320 if (status)
6321 goto out;
6322 status = decode_savefh(xdr);
6323 if (status)
6324 goto out;
6325 status = decode_putfh(xdr);
6326 if (status)
6327 goto out;
6328 status = decode_link(xdr, &res->cinfo);
6329 if (status)
6330 goto out;
6331 /*
6332 * Note order: OP_LINK leaves the directory as the current
6333 * filehandle.
6334 */
6335 status = decode_restorefh(xdr);
6336 if (status)
6337 goto out;
6338 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6339out:
6340 return status;
6341}
6342
6343/*
6344 * Decode CREATE response
6345 */
6346static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6347 struct nfs4_create_res *res)
6348{
6349 struct compound_hdr hdr;
6350 int status;
6351
6352 status = decode_compound_hdr(xdr, &hdr);
6353 if (status)
6354 goto out;
6355 status = decode_sequence(xdr, &res->seq_res, rqstp);
6356 if (status)
6357 goto out;
6358 status = decode_putfh(xdr);
6359 if (status)
6360 goto out;
6361 status = decode_create(xdr, &res->dir_cinfo);
6362 if (status)
6363 goto out;
6364 status = decode_getfh(xdr, res->fh);
6365 if (status)
6366 goto out;
6367 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6368out:
6369 return status;
6370}
6371
6372/*
6373 * Decode SYMLINK response
6374 */
6375static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6376 struct nfs4_create_res *res)
6377{
6378 return nfs4_xdr_dec_create(rqstp, xdr, res);
6379}
6380
6381/*
6382 * Decode GETATTR response
6383 */
6384static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6385 struct nfs4_getattr_res *res)
6386{
6387 struct compound_hdr hdr;
6388 int status;
6389
6390 status = decode_compound_hdr(xdr, &hdr);
6391 if (status)
6392 goto out;
6393 status = decode_sequence(xdr, &res->seq_res, rqstp);
6394 if (status)
6395 goto out;
6396 status = decode_putfh(xdr);
6397 if (status)
6398 goto out;
6399 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6400out:
6401 return status;
6402}
6403
6404/*
6405 * Encode an SETACL request
6406 */
6407static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6408 struct nfs_setaclargs *args)
6409{
6410 struct compound_hdr hdr = {
6411 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6412 };
6413
6414 encode_compound_hdr(xdr, req, &hdr);
6415 encode_sequence(xdr, &args->seq_args, &hdr);
6416 encode_putfh(xdr, args->fh, &hdr);
6417 encode_setacl(xdr, args, &hdr);
6418 encode_nops(&hdr);
6419}
6420
6421/*
6422 * Decode SETACL response
6423 */
6424static int
6425nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6426 struct nfs_setaclres *res)
6427{
6428 struct compound_hdr hdr;
6429 int status;
6430
6431 status = decode_compound_hdr(xdr, &hdr);
6432 if (status)
6433 goto out;
6434 status = decode_sequence(xdr, &res->seq_res, rqstp);
6435 if (status)
6436 goto out;
6437 status = decode_putfh(xdr);
6438 if (status)
6439 goto out;
6440 status = decode_setattr(xdr);
6441out:
6442 return status;
6443}
6444
6445/*
6446 * Decode GETACL response
6447 */
6448static int
6449nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6450 struct nfs_getaclres *res)
6451{
6452 struct compound_hdr hdr;
6453 int status;
6454
6455 if (res->acl_scratch != NULL) {
6456 void *p = page_address(res->acl_scratch);
6457 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6458 }
6459 status = decode_compound_hdr(xdr, &hdr);
6460 if (status)
6461 goto out;
6462 status = decode_sequence(xdr, &res->seq_res, rqstp);
6463 if (status)
6464 goto out;
6465 status = decode_putfh(xdr);
6466 if (status)
6467 goto out;
6468 status = decode_getacl(xdr, rqstp, res);
6469
6470out:
6471 return status;
6472}
6473
6474/*
6475 * Decode CLOSE response
6476 */
6477static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6478 struct nfs_closeres *res)
6479{
6480 struct compound_hdr hdr;
6481 int status;
6482
6483 status = decode_compound_hdr(xdr, &hdr);
6484 if (status)
6485 goto out;
6486 status = decode_sequence(xdr, &res->seq_res, rqstp);
6487 if (status)
6488 goto out;
6489 status = decode_putfh(xdr);
6490 if (status)
6491 goto out;
6492 if (res->lr_res) {
6493 status = decode_layoutreturn(xdr, res->lr_res);
6494 res->lr_ret = status;
6495 if (status)
6496 goto out;
6497 }
6498 if (res->fattr != NULL) {
6499 status = decode_getfattr(xdr, res->fattr, res->server);
6500 if (status != 0)
6501 goto out;
6502 }
6503 status = decode_close(xdr, res);
6504out:
6505 return status;
6506}
6507
6508/*
6509 * Decode OPEN response
6510 */
6511static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6512 struct nfs_openres *res)
6513{
6514 struct compound_hdr hdr;
6515 int status;
6516
6517 status = decode_compound_hdr(xdr, &hdr);
6518 if (status)
6519 goto out;
6520 status = decode_sequence(xdr, &res->seq_res, rqstp);
6521 if (status)
6522 goto out;
6523 status = decode_putfh(xdr);
6524 if (status)
6525 goto out;
6526 status = decode_open(xdr, res);
6527 if (status)
6528 goto out;
6529 status = decode_getfh(xdr, &res->fh);
6530 if (status)
6531 goto out;
6532 if (res->access_request)
6533 decode_access(xdr, &res->access_supported, &res->access_result);
6534 decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6535out:
6536 return status;
6537}
6538
6539/*
6540 * Decode OPEN_CONFIRM response
6541 */
6542static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6543 struct xdr_stream *xdr,
6544 struct nfs_open_confirmres *res)
6545{
6546 struct compound_hdr hdr;
6547 int status;
6548
6549 status = decode_compound_hdr(xdr, &hdr);
6550 if (status)
6551 goto out;
6552 status = decode_putfh(xdr);
6553 if (status)
6554 goto out;
6555 status = decode_open_confirm(xdr, res);
6556out:
6557 return status;
6558}
6559
6560/*
6561 * Decode OPEN response
6562 */
6563static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6564 struct xdr_stream *xdr,
6565 struct nfs_openres *res)
6566{
6567 struct compound_hdr hdr;
6568 int status;
6569
6570 status = decode_compound_hdr(xdr, &hdr);
6571 if (status)
6572 goto out;
6573 status = decode_sequence(xdr, &res->seq_res, rqstp);
6574 if (status)
6575 goto out;
6576 status = decode_putfh(xdr);
6577 if (status)
6578 goto out;
6579 status = decode_open(xdr, res);
6580 if (status)
6581 goto out;
6582 if (res->access_request)
6583 decode_access(xdr, &res->access_supported, &res->access_result);
6584 decode_getfattr(xdr, res->f_attr, res->server);
6585out:
6586 return status;
6587}
6588
6589/*
6590 * Decode SETATTR response
6591 */
6592static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6593 struct xdr_stream *xdr,
6594 struct nfs_setattrres *res)
6595{
6596 struct compound_hdr hdr;
6597 int status;
6598
6599 status = decode_compound_hdr(xdr, &hdr);
6600 if (status)
6601 goto out;
6602 status = decode_sequence(xdr, &res->seq_res, rqstp);
6603 if (status)
6604 goto out;
6605 status = decode_putfh(xdr);
6606 if (status)
6607 goto out;
6608 status = decode_setattr(xdr);
6609 if (status)
6610 goto out;
6611 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6612out:
6613 return status;
6614}
6615
6616/*
6617 * Decode LOCK response
6618 */
6619static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6620 struct nfs_lock_res *res)
6621{
6622 struct compound_hdr hdr;
6623 int status;
6624
6625 status = decode_compound_hdr(xdr, &hdr);
6626 if (status)
6627 goto out;
6628 status = decode_sequence(xdr, &res->seq_res, rqstp);
6629 if (status)
6630 goto out;
6631 status = decode_putfh(xdr);
6632 if (status)
6633 goto out;
6634 status = decode_lock(xdr, res);
6635out:
6636 return status;
6637}
6638
6639/*
6640 * Decode LOCKT response
6641 */
6642static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6643 struct nfs_lockt_res *res)
6644{
6645 struct compound_hdr hdr;
6646 int status;
6647
6648 status = decode_compound_hdr(xdr, &hdr);
6649 if (status)
6650 goto out;
6651 status = decode_sequence(xdr, &res->seq_res, rqstp);
6652 if (status)
6653 goto out;
6654 status = decode_putfh(xdr);
6655 if (status)
6656 goto out;
6657 status = decode_lockt(xdr, res);
6658out:
6659 return status;
6660}
6661
6662/*
6663 * Decode LOCKU response
6664 */
6665static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6666 struct nfs_locku_res *res)
6667{
6668 struct compound_hdr hdr;
6669 int status;
6670
6671 status = decode_compound_hdr(xdr, &hdr);
6672 if (status)
6673 goto out;
6674 status = decode_sequence(xdr, &res->seq_res, rqstp);
6675 if (status)
6676 goto out;
6677 status = decode_putfh(xdr);
6678 if (status)
6679 goto out;
6680 status = decode_locku(xdr, res);
6681out:
6682 return status;
6683}
6684
6685static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6686 struct xdr_stream *xdr, void *dummy)
6687{
6688 struct compound_hdr hdr;
6689 int status;
6690
6691 status = decode_compound_hdr(xdr, &hdr);
6692 if (!status)
6693 status = decode_release_lockowner(xdr);
6694 return status;
6695}
6696
6697/*
6698 * Decode READLINK response
6699 */
6700static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6701 struct xdr_stream *xdr,
6702 struct nfs4_readlink_res *res)
6703{
6704 struct compound_hdr hdr;
6705 int status;
6706
6707 status = decode_compound_hdr(xdr, &hdr);
6708 if (status)
6709 goto out;
6710 status = decode_sequence(xdr, &res->seq_res, rqstp);
6711 if (status)
6712 goto out;
6713 status = decode_putfh(xdr);
6714 if (status)
6715 goto out;
6716 status = decode_readlink(xdr, rqstp);
6717out:
6718 return status;
6719}
6720
6721/*
6722 * Decode READDIR response
6723 */
6724static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6725 struct nfs4_readdir_res *res)
6726{
6727 struct compound_hdr hdr;
6728 int status;
6729
6730 status = decode_compound_hdr(xdr, &hdr);
6731 if (status)
6732 goto out;
6733 status = decode_sequence(xdr, &res->seq_res, rqstp);
6734 if (status)
6735 goto out;
6736 status = decode_putfh(xdr);
6737 if (status)
6738 goto out;
6739 status = decode_readdir(xdr, rqstp, res);
6740out:
6741 return status;
6742}
6743
6744/*
6745 * Decode Read response
6746 */
6747static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6748 struct nfs_pgio_res *res)
6749{
6750 struct compound_hdr hdr;
6751 int status;
6752
6753 status = decode_compound_hdr(xdr, &hdr);
6754 res->op_status = hdr.status;
6755 if (status)
6756 goto out;
6757 status = decode_sequence(xdr, &res->seq_res, rqstp);
6758 if (status)
6759 goto out;
6760 status = decode_putfh(xdr);
6761 if (status)
6762 goto out;
6763 status = decode_read(xdr, rqstp, res);
6764 if (!status)
6765 status = res->count;
6766out:
6767 return status;
6768}
6769
6770/*
6771 * Decode WRITE response
6772 */
6773static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6774 struct nfs_pgio_res *res)
6775{
6776 struct compound_hdr hdr;
6777 int status;
6778
6779 status = decode_compound_hdr(xdr, &hdr);
6780 res->op_status = hdr.status;
6781 if (status)
6782 goto out;
6783 status = decode_sequence(xdr, &res->seq_res, rqstp);
6784 if (status)
6785 goto out;
6786 status = decode_putfh(xdr);
6787 if (status)
6788 goto out;
6789 status = decode_write(xdr, res);
6790 if (status)
6791 goto out;
6792 if (res->fattr)
6793 decode_getfattr(xdr, res->fattr, res->server);
6794 if (!status)
6795 status = res->count;
6796out:
6797 return status;
6798}
6799
6800/*
6801 * Decode COMMIT response
6802 */
6803static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6804 struct nfs_commitres *res)
6805{
6806 struct compound_hdr hdr;
6807 int status;
6808
6809 status = decode_compound_hdr(xdr, &hdr);
6810 res->op_status = hdr.status;
6811 if (status)
6812 goto out;
6813 status = decode_sequence(xdr, &res->seq_res, rqstp);
6814 if (status)
6815 goto out;
6816 status = decode_putfh(xdr);
6817 if (status)
6818 goto out;
6819 status = decode_commit(xdr, res);
6820out:
6821 return status;
6822}
6823
6824/*
6825 * Decode FSINFO response
6826 */
6827static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6828 struct nfs4_fsinfo_res *res)
6829{
6830 struct compound_hdr hdr;
6831 int status;
6832
6833 status = decode_compound_hdr(xdr, &hdr);
6834 if (!status)
6835 status = decode_sequence(xdr, &res->seq_res, req);
6836 if (!status)
6837 status = decode_putfh(xdr);
6838 if (!status)
6839 status = decode_fsinfo(xdr, res->fsinfo);
6840 return status;
6841}
6842
6843/*
6844 * Decode PATHCONF response
6845 */
6846static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6847 struct nfs4_pathconf_res *res)
6848{
6849 struct compound_hdr hdr;
6850 int status;
6851
6852 status = decode_compound_hdr(xdr, &hdr);
6853 if (!status)
6854 status = decode_sequence(xdr, &res->seq_res, req);
6855 if (!status)
6856 status = decode_putfh(xdr);
6857 if (!status)
6858 status = decode_pathconf(xdr, res->pathconf);
6859 return status;
6860}
6861
6862/*
6863 * Decode STATFS response
6864 */
6865static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6866 struct nfs4_statfs_res *res)
6867{
6868 struct compound_hdr hdr;
6869 int status;
6870
6871 status = decode_compound_hdr(xdr, &hdr);
6872 if (!status)
6873 status = decode_sequence(xdr, &res->seq_res, req);
6874 if (!status)
6875 status = decode_putfh(xdr);
6876 if (!status)
6877 status = decode_statfs(xdr, res->fsstat);
6878 return status;
6879}
6880
6881/*
6882 * Decode GETATTR_BITMAP response
6883 */
6884static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6885 struct xdr_stream *xdr,
6886 struct nfs4_server_caps_res *res)
6887{
6888 struct compound_hdr hdr;
6889 int status;
6890
6891 status = decode_compound_hdr(xdr, &hdr);
6892 if (status)
6893 goto out;
6894 status = decode_sequence(xdr, &res->seq_res, req);
6895 if (status)
6896 goto out;
6897 status = decode_putfh(xdr);
6898 if (status)
6899 goto out;
6900 status = decode_server_caps(xdr, res);
6901out:
6902 return status;
6903}
6904
6905/*
6906 * Decode RENEW response
6907 */
6908static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6909 void *__unused)
6910{
6911 struct compound_hdr hdr;
6912 int status;
6913
6914 status = decode_compound_hdr(xdr, &hdr);
6915 if (!status)
6916 status = decode_renew(xdr);
6917 return status;
6918}
6919
6920/*
6921 * Decode SETCLIENTID response
6922 */
6923static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6924 struct xdr_stream *xdr,
6925 struct nfs4_setclientid_res *res)
6926{
6927 struct compound_hdr hdr;
6928 int status;
6929
6930 status = decode_compound_hdr(xdr, &hdr);
6931 if (!status)
6932 status = decode_setclientid(xdr, res);
6933 return status;
6934}
6935
6936/*
6937 * Decode SETCLIENTID_CONFIRM response
6938 */
6939static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6940 struct xdr_stream *xdr)
6941{
6942 struct compound_hdr hdr;
6943 int status;
6944
6945 status = decode_compound_hdr(xdr, &hdr);
6946 if (!status)
6947 status = decode_setclientid_confirm(xdr);
6948 return status;
6949}
6950
6951/*
6952 * Decode DELEGRETURN response
6953 */
6954static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6955 struct xdr_stream *xdr,
6956 struct nfs4_delegreturnres *res)
6957{
6958 struct compound_hdr hdr;
6959 int status;
6960
6961 status = decode_compound_hdr(xdr, &hdr);
6962 if (status)
6963 goto out;
6964 status = decode_sequence(xdr, &res->seq_res, rqstp);
6965 if (status)
6966 goto out;
6967 status = decode_putfh(xdr);
6968 if (status != 0)
6969 goto out;
6970 if (res->lr_res) {
6971 status = decode_layoutreturn(xdr, res->lr_res);
6972 res->lr_ret = status;
6973 if (status)
6974 goto out;
6975 }
6976 if (res->fattr) {
6977 status = decode_getfattr(xdr, res->fattr, res->server);
6978 if (status != 0)
6979 goto out;
6980 }
6981 status = decode_delegreturn(xdr);
6982out:
6983 return status;
6984}
6985
6986/*
6987 * Decode FS_LOCATIONS response
6988 */
6989static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6990 struct xdr_stream *xdr,
6991 struct nfs4_fs_locations_res *res)
6992{
6993 struct compound_hdr hdr;
6994 int status;
6995
6996 status = decode_compound_hdr(xdr, &hdr);
6997 if (status)
6998 goto out;
6999 status = decode_sequence(xdr, &res->seq_res, req);
7000 if (status)
7001 goto out;
7002 status = decode_putfh(xdr);
7003 if (status)
7004 goto out;
7005 if (res->migration) {
7006 xdr_enter_page(xdr, PAGE_SIZE);
7007 status = decode_getfattr_generic(xdr,
7008 &res->fs_locations->fattr,
7009 NULL, res->fs_locations,
7010 NULL, res->fs_locations->server);
7011 if (status)
7012 goto out;
7013 if (res->renew)
7014 status = decode_renew(xdr);
7015 } else {
7016 status = decode_lookup(xdr);
7017 if (status)
7018 goto out;
7019 xdr_enter_page(xdr, PAGE_SIZE);
7020 status = decode_getfattr_generic(xdr,
7021 &res->fs_locations->fattr,
7022 NULL, res->fs_locations,
7023 NULL, res->fs_locations->server);
7024 }
7025out:
7026 return status;
7027}
7028
7029/*
7030 * Decode SECINFO response
7031 */
7032static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
7033 struct xdr_stream *xdr,
7034 struct nfs4_secinfo_res *res)
7035{
7036 struct compound_hdr hdr;
7037 int status;
7038
7039 status = decode_compound_hdr(xdr, &hdr);
7040 if (status)
7041 goto out;
7042 status = decode_sequence(xdr, &res->seq_res, rqstp);
7043 if (status)
7044 goto out;
7045 status = decode_putfh(xdr);
7046 if (status)
7047 goto out;
7048 status = decode_secinfo(xdr, res);
7049out:
7050 return status;
7051}
7052
7053/*
7054 * Decode FSID_PRESENT response
7055 */
7056static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7057 struct xdr_stream *xdr,
7058 struct nfs4_fsid_present_res *res)
7059{
7060 struct compound_hdr hdr;
7061 int status;
7062
7063 status = decode_compound_hdr(xdr, &hdr);
7064 if (status)
7065 goto out;
7066 status = decode_sequence(xdr, &res->seq_res, rqstp);
7067 if (status)
7068 goto out;
7069 status = decode_putfh(xdr);
7070 if (status)
7071 goto out;
7072 status = decode_getfh(xdr, res->fh);
7073 if (status)
7074 goto out;
7075 if (res->renew)
7076 status = decode_renew(xdr);
7077out:
7078 return status;
7079}
7080
7081#if defined(CONFIG_NFS_V4_1)
7082/*
7083 * Decode BIND_CONN_TO_SESSION response
7084 */
7085static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7086 struct xdr_stream *xdr,
7087 void *res)
7088{
7089 struct compound_hdr hdr;
7090 int status;
7091
7092 status = decode_compound_hdr(xdr, &hdr);
7093 if (!status)
7094 status = decode_bind_conn_to_session(xdr, res);
7095 return status;
7096}
7097
7098/*
7099 * Decode EXCHANGE_ID response
7100 */
7101static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7102 struct xdr_stream *xdr,
7103 void *res)
7104{
7105 struct compound_hdr hdr;
7106 int status;
7107
7108 status = decode_compound_hdr(xdr, &hdr);
7109 if (!status)
7110 status = decode_exchange_id(xdr, res);
7111 return status;
7112}
7113
7114/*
7115 * Decode CREATE_SESSION response
7116 */
7117static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7118 struct xdr_stream *xdr,
7119 struct nfs41_create_session_res *res)
7120{
7121 struct compound_hdr hdr;
7122 int status;
7123
7124 status = decode_compound_hdr(xdr, &hdr);
7125 if (!status)
7126 status = decode_create_session(xdr, res);
7127 return status;
7128}
7129
7130/*
7131 * Decode DESTROY_SESSION response
7132 */
7133static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7134 struct xdr_stream *xdr,
7135 void *res)
7136{
7137 struct compound_hdr hdr;
7138 int status;
7139
7140 status = decode_compound_hdr(xdr, &hdr);
7141 if (!status)
7142 status = decode_destroy_session(xdr, res);
7143 return status;
7144}
7145
7146/*
7147 * Decode DESTROY_CLIENTID response
7148 */
7149static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7150 struct xdr_stream *xdr,
7151 void *res)
7152{
7153 struct compound_hdr hdr;
7154 int status;
7155
7156 status = decode_compound_hdr(xdr, &hdr);
7157 if (!status)
7158 status = decode_destroy_clientid(xdr, res);
7159 return status;
7160}
7161
7162/*
7163 * Decode SEQUENCE response
7164 */
7165static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7166 struct xdr_stream *xdr,
7167 struct nfs4_sequence_res *res)
7168{
7169 struct compound_hdr hdr;
7170 int status;
7171
7172 status = decode_compound_hdr(xdr, &hdr);
7173 if (!status)
7174 status = decode_sequence(xdr, res, rqstp);
7175 return status;
7176}
7177
7178/*
7179 * Decode GET_LEASE_TIME response
7180 */
7181static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7182 struct xdr_stream *xdr,
7183 struct nfs4_get_lease_time_res *res)
7184{
7185 struct compound_hdr hdr;
7186 int status;
7187
7188 status = decode_compound_hdr(xdr, &hdr);
7189 if (!status)
7190 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7191 if (!status)
7192 status = decode_putrootfh(xdr);
7193 if (!status)
7194 status = decode_fsinfo(xdr, res->lr_fsinfo);
7195 return status;
7196}
7197
7198/*
7199 * Decode RECLAIM_COMPLETE response
7200 */
7201static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7202 struct xdr_stream *xdr,
7203 struct nfs41_reclaim_complete_res *res)
7204{
7205 struct compound_hdr hdr;
7206 int status;
7207
7208 status = decode_compound_hdr(xdr, &hdr);
7209 if (!status)
7210 status = decode_sequence(xdr, &res->seq_res, rqstp);
7211 if (!status)
7212 status = decode_reclaim_complete(xdr, NULL);
7213 return status;
7214}
7215
7216/*
7217 * Decode GETDEVINFO response
7218 */
7219static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7220 struct xdr_stream *xdr,
7221 struct nfs4_getdeviceinfo_res *res)
7222{
7223 struct compound_hdr hdr;
7224 int status;
7225
7226 status = decode_compound_hdr(xdr, &hdr);
7227 if (status != 0)
7228 goto out;
7229 status = decode_sequence(xdr, &res->seq_res, rqstp);
7230 if (status != 0)
7231 goto out;
7232 status = decode_getdeviceinfo(xdr, res);
7233out:
7234 return status;
7235}
7236
7237/*
7238 * Decode LAYOUTGET response
7239 */
7240static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7241 struct xdr_stream *xdr,
7242 struct nfs4_layoutget_res *res)
7243{
7244 struct compound_hdr hdr;
7245 int status;
7246
7247 status = decode_compound_hdr(xdr, &hdr);
7248 if (status)
7249 goto out;
7250 status = decode_sequence(xdr, &res->seq_res, rqstp);
7251 if (status)
7252 goto out;
7253 status = decode_putfh(xdr);
7254 if (status)
7255 goto out;
7256 status = decode_layoutget(xdr, rqstp, res);
7257out:
7258 return status;
7259}
7260
7261/*
7262 * Decode LAYOUTRETURN response
7263 */
7264static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7265 struct xdr_stream *xdr,
7266 struct nfs4_layoutreturn_res *res)
7267{
7268 struct compound_hdr hdr;
7269 int status;
7270
7271 status = decode_compound_hdr(xdr, &hdr);
7272 if (status)
7273 goto out;
7274 status = decode_sequence(xdr, &res->seq_res, rqstp);
7275 if (status)
7276 goto out;
7277 status = decode_putfh(xdr);
7278 if (status)
7279 goto out;
7280 status = decode_layoutreturn(xdr, res);
7281out:
7282 return status;
7283}
7284
7285/*
7286 * Decode LAYOUTCOMMIT response
7287 */
7288static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7289 struct xdr_stream *xdr,
7290 struct nfs4_layoutcommit_res *res)
7291{
7292 struct compound_hdr hdr;
7293 int status;
7294
7295 status = decode_compound_hdr(xdr, &hdr);
7296 if (status)
7297 goto out;
7298 status = decode_sequence(xdr, &res->seq_res, rqstp);
7299 if (status)
7300 goto out;
7301 status = decode_putfh(xdr);
7302 if (status)
7303 goto out;
7304 status = decode_layoutcommit(xdr, rqstp, res);
7305 if (status)
7306 goto out;
7307 decode_getfattr(xdr, res->fattr, res->server);
7308out:
7309 return status;
7310}
7311
7312/*
7313 * Decode SECINFO_NO_NAME response
7314 */
7315static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7316 struct xdr_stream *xdr,
7317 struct nfs4_secinfo_res *res)
7318{
7319 struct compound_hdr hdr;
7320 int status;
7321
7322 status = decode_compound_hdr(xdr, &hdr);
7323 if (status)
7324 goto out;
7325 status = decode_sequence(xdr, &res->seq_res, rqstp);
7326 if (status)
7327 goto out;
7328 status = decode_putrootfh(xdr);
7329 if (status)
7330 goto out;
7331 status = decode_secinfo_no_name(xdr, res);
7332out:
7333 return status;
7334}
7335
7336/*
7337 * Decode TEST_STATEID response
7338 */
7339static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7340 struct xdr_stream *xdr,
7341 struct nfs41_test_stateid_res *res)
7342{
7343 struct compound_hdr hdr;
7344 int status;
7345
7346 status = decode_compound_hdr(xdr, &hdr);
7347 if (status)
7348 goto out;
7349 status = decode_sequence(xdr, &res->seq_res, rqstp);
7350 if (status)
7351 goto out;
7352 status = decode_test_stateid(xdr, res);
7353out:
7354 return status;
7355}
7356
7357/*
7358 * Decode FREE_STATEID response
7359 */
7360static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7361 struct xdr_stream *xdr,
7362 struct nfs41_free_stateid_res *res)
7363{
7364 struct compound_hdr hdr;
7365 int status;
7366
7367 status = decode_compound_hdr(xdr, &hdr);
7368 if (status)
7369 goto out;
7370 status = decode_sequence(xdr, &res->seq_res, rqstp);
7371 if (status)
7372 goto out;
7373 status = decode_free_stateid(xdr, res);
7374out:
7375 return status;
7376}
7377#endif /* CONFIG_NFS_V4_1 */
7378
7379/**
7380 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7381 * the local page cache.
7382 * @xdr: XDR stream where entry resides
7383 * @entry: buffer to fill in with entry data
7384 * @plus: boolean indicating whether this should be a readdirplus entry
7385 *
7386 * Returns zero if successful, otherwise a negative errno value is
7387 * returned.
7388 *
7389 * This function is not invoked during READDIR reply decoding, but
7390 * rather whenever an application invokes the getdents(2) system call
7391 * on a directory already in our cache.
7392 */
7393int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7394 int plus)
7395{
7396 unsigned int savep;
7397 uint32_t bitmap[3] = {0};
7398 uint32_t len;
7399 __be32 *p = xdr_inline_decode(xdr, 4);
7400 if (unlikely(!p))
7401 goto out_overflow;
7402 if (*p == xdr_zero) {
7403 p = xdr_inline_decode(xdr, 4);
7404 if (unlikely(!p))
7405 goto out_overflow;
7406 if (*p == xdr_zero)
7407 return -EAGAIN;
7408 entry->eof = 1;
7409 return -EBADCOOKIE;
7410 }
7411
7412 p = xdr_inline_decode(xdr, 12);
7413 if (unlikely(!p))
7414 goto out_overflow;
7415 entry->prev_cookie = entry->cookie;
7416 p = xdr_decode_hyper(p, &entry->cookie);
7417 entry->len = be32_to_cpup(p);
7418
7419 p = xdr_inline_decode(xdr, entry->len);
7420 if (unlikely(!p))
7421 goto out_overflow;
7422 entry->name = (const char *) p;
7423
7424 /*
7425 * In case the server doesn't return an inode number,
7426 * we fake one here. (We don't use inode number 0,
7427 * since glibc seems to choke on it...)
7428 */
7429 entry->ino = 1;
7430 entry->fattr->valid = 0;
7431
7432 if (decode_attr_bitmap(xdr, bitmap) < 0)
7433 goto out_overflow;
7434
7435 if (decode_attr_length(xdr, &len, &savep) < 0)
7436 goto out_overflow;
7437
7438 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7439 NULL, entry->label, entry->server) < 0)
7440 goto out_overflow;
7441 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7442 entry->ino = entry->fattr->mounted_on_fileid;
7443 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7444 entry->ino = entry->fattr->fileid;
7445
7446 entry->d_type = DT_UNKNOWN;
7447 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7448 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7449
7450 return 0;
7451
7452out_overflow:
7453 print_overflow_msg(__func__, xdr);
7454 return -EAGAIN;
7455}
7456
7457/*
7458 * We need to translate between nfs status return values and
7459 * the local errno values which may not be the same.
7460 */
7461static struct {
7462 int stat;
7463 int errno;
7464} nfs_errtbl[] = {
7465 { NFS4_OK, 0 },
7466 { NFS4ERR_PERM, -EPERM },
7467 { NFS4ERR_NOENT, -ENOENT },
7468 { NFS4ERR_IO, -errno_NFSERR_IO},
7469 { NFS4ERR_NXIO, -ENXIO },
7470 { NFS4ERR_ACCESS, -EACCES },
7471 { NFS4ERR_EXIST, -EEXIST },
7472 { NFS4ERR_XDEV, -EXDEV },
7473 { NFS4ERR_NOTDIR, -ENOTDIR },
7474 { NFS4ERR_ISDIR, -EISDIR },
7475 { NFS4ERR_INVAL, -EINVAL },
7476 { NFS4ERR_FBIG, -EFBIG },
7477 { NFS4ERR_NOSPC, -ENOSPC },
7478 { NFS4ERR_ROFS, -EROFS },
7479 { NFS4ERR_MLINK, -EMLINK },
7480 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7481 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7482 { NFS4ERR_DQUOT, -EDQUOT },
7483 { NFS4ERR_STALE, -ESTALE },
7484 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7485 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7486 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7487 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7488 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7489 { NFS4ERR_BADTYPE, -EBADTYPE },
7490 { NFS4ERR_LOCKED, -EAGAIN },
7491 { NFS4ERR_SYMLINK, -ELOOP },
7492 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7493 { NFS4ERR_DEADLOCK, -EDEADLK },
7494 { -1, -EIO }
7495};
7496
7497/*
7498 * Convert an NFS error code to a local one.
7499 * This one is used jointly by NFSv2 and NFSv3.
7500 */
7501static int
7502nfs4_stat_to_errno(int stat)
7503{
7504 int i;
7505 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7506 if (nfs_errtbl[i].stat == stat)
7507 return nfs_errtbl[i].errno;
7508 }
7509 if (stat <= 10000 || stat > 10100) {
7510 /* The server is looney tunes. */
7511 return -EREMOTEIO;
7512 }
7513 /* If we cannot translate the error, the recovery routines should
7514 * handle it.
7515 * Note: remaining NFSv4 error codes have values > 10000, so should
7516 * not conflict with native Linux error codes.
7517 */
7518 return -stat;
7519}
7520
7521#ifdef CONFIG_NFS_V4_2
7522#include "nfs42xdr.c"
7523#endif /* CONFIG_NFS_V4_2 */
7524
7525#define PROC(proc, argtype, restype) \
7526[NFSPROC4_CLNT_##proc] = { \
7527 .p_proc = NFSPROC4_COMPOUND, \
7528 .p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \
7529 .p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \
7530 .p_arglen = NFS4_##argtype##_sz, \
7531 .p_replen = NFS4_##restype##_sz, \
7532 .p_statidx = NFSPROC4_CLNT_##proc, \
7533 .p_name = #proc, \
7534}
7535
7536#define STUB(proc) \
7537[NFSPROC4_CLNT_##proc] = { \
7538 .p_name = #proc, \
7539}
7540
7541struct rpc_procinfo nfs4_procedures[] = {
7542 PROC(READ, enc_read, dec_read),
7543 PROC(WRITE, enc_write, dec_write),
7544 PROC(COMMIT, enc_commit, dec_commit),
7545 PROC(OPEN, enc_open, dec_open),
7546 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7547 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7548 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7549 PROC(CLOSE, enc_close, dec_close),
7550 PROC(SETATTR, enc_setattr, dec_setattr),
7551 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7552 PROC(RENEW, enc_renew, dec_renew),
7553 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7554 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7555 PROC(LOCK, enc_lock, dec_lock),
7556 PROC(LOCKT, enc_lockt, dec_lockt),
7557 PROC(LOCKU, enc_locku, dec_locku),
7558 PROC(ACCESS, enc_access, dec_access),
7559 PROC(GETATTR, enc_getattr, dec_getattr),
7560 PROC(LOOKUP, enc_lookup, dec_lookup),
7561 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7562 PROC(REMOVE, enc_remove, dec_remove),
7563 PROC(RENAME, enc_rename, dec_rename),
7564 PROC(LINK, enc_link, dec_link),
7565 PROC(SYMLINK, enc_symlink, dec_symlink),
7566 PROC(CREATE, enc_create, dec_create),
7567 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7568 PROC(STATFS, enc_statfs, dec_statfs),
7569 PROC(READLINK, enc_readlink, dec_readlink),
7570 PROC(READDIR, enc_readdir, dec_readdir),
7571 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7572 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7573 PROC(GETACL, enc_getacl, dec_getacl),
7574 PROC(SETACL, enc_setacl, dec_setacl),
7575 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7576 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7577 PROC(SECINFO, enc_secinfo, dec_secinfo),
7578 PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present),
7579#if defined(CONFIG_NFS_V4_1)
7580 PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7581 PROC(CREATE_SESSION, enc_create_session, dec_create_session),
7582 PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7583 PROC(SEQUENCE, enc_sequence, dec_sequence),
7584 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7585 PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
7586 PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7587 PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
7588 PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7589 PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7590 PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7591 PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7592 PROC(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7593 STUB(GETDEVICELIST),
7594 PROC(BIND_CONN_TO_SESSION,
7595 enc_bind_conn_to_session, dec_bind_conn_to_session),
7596 PROC(DESTROY_CLIENTID, enc_destroy_clientid, dec_destroy_clientid),
7597#endif /* CONFIG_NFS_V4_1 */
7598#ifdef CONFIG_NFS_V4_2
7599 PROC(SEEK, enc_seek, dec_seek),
7600 PROC(ALLOCATE, enc_allocate, dec_allocate),
7601 PROC(DEALLOCATE, enc_deallocate, dec_deallocate),
7602 PROC(LAYOUTSTATS, enc_layoutstats, dec_layoutstats),
7603 PROC(CLONE, enc_clone, dec_clone),
7604 PROC(COPY, enc_copy, dec_copy),
7605#endif /* CONFIG_NFS_V4_2 */
7606};
7607
7608const struct rpc_version nfs_version4 = {
7609 .number = 4,
7610 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7611 .procs = nfs4_procedures
7612};
7613
7614/*
7615 * Local variables:
7616 * c-basic-offset: 8
7617 * End:
7618 */