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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
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 timespec *t)
1063{
1064 p = xdr_encode_hyper(p, (__s64)t->tv_sec);
1065 *p++ = cpu_to_be32(t->tv_nsec);
1066 return p;
1067}
1068
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 struct timespec ts;
1076 char owner_name[IDMAP_NAMESZ];
1077 char owner_group[IDMAP_NAMESZ];
1078 int owner_namelen = 0;
1079 int owner_grouplen = 0;
1080 __be32 *p;
1081 uint32_t len = 0;
1082 uint32_t bmval[3] = { 0 };
1083
1084 /*
1085 * We reserve enough space to write the entire attribute buffer at once.
1086 */
1087 if ((iap->ia_valid & ATTR_SIZE) && (attrmask[0] & FATTR4_WORD0_SIZE)) {
1088 bmval[0] |= FATTR4_WORD0_SIZE;
1089 len += 8;
1090 }
1091 if (iap->ia_valid & ATTR_MODE) {
1092 if (umask && (attrmask[2] & FATTR4_WORD2_MODE_UMASK)) {
1093 bmval[2] |= FATTR4_WORD2_MODE_UMASK;
1094 len += 8;
1095 } else if (attrmask[1] & FATTR4_WORD1_MODE) {
1096 bmval[1] |= FATTR4_WORD1_MODE;
1097 len += 4;
1098 }
1099 }
1100 if ((iap->ia_valid & ATTR_UID) && (attrmask[1] & FATTR4_WORD1_OWNER)) {
1101 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
1102 if (owner_namelen < 0) {
1103 dprintk("nfs: couldn't resolve uid %d to string\n",
1104 from_kuid(&init_user_ns, iap->ia_uid));
1105 /* XXX */
1106 strcpy(owner_name, "nobody");
1107 owner_namelen = sizeof("nobody") - 1;
1108 /* goto out; */
1109 }
1110 bmval[1] |= FATTR4_WORD1_OWNER;
1111 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
1112 }
1113 if ((iap->ia_valid & ATTR_GID) &&
1114 (attrmask[1] & FATTR4_WORD1_OWNER_GROUP)) {
1115 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
1116 if (owner_grouplen < 0) {
1117 dprintk("nfs: couldn't resolve gid %d to string\n",
1118 from_kgid(&init_user_ns, iap->ia_gid));
1119 strcpy(owner_group, "nobody");
1120 owner_grouplen = sizeof("nobody") - 1;
1121 /* goto out; */
1122 }
1123 bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
1124 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
1125 }
1126 if (attrmask[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1127 if (iap->ia_valid & ATTR_ATIME_SET) {
1128 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1129 len += 4 + (nfstime4_maxsz << 2);
1130 } else if (iap->ia_valid & ATTR_ATIME) {
1131 bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
1132 len += 4;
1133 }
1134 }
1135 if (attrmask[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1136 if (iap->ia_valid & ATTR_MTIME_SET) {
1137 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1138 len += 4 + (nfstime4_maxsz << 2);
1139 } else if (iap->ia_valid & ATTR_MTIME) {
1140 bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
1141 len += 4;
1142 }
1143 }
1144
1145 if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1146 len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
1147 bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
1148 }
1149
1150 xdr_encode_bitmap4(xdr, bmval, ARRAY_SIZE(bmval));
1151 xdr_stream_encode_opaque_inline(xdr, (void **)&p, len);
1152
1153 if (bmval[0] & FATTR4_WORD0_SIZE)
1154 p = xdr_encode_hyper(p, iap->ia_size);
1155 if (bmval[1] & FATTR4_WORD1_MODE)
1156 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1157 if (bmval[1] & FATTR4_WORD1_OWNER)
1158 p = xdr_encode_opaque(p, owner_name, owner_namelen);
1159 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
1160 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
1161 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1162 if (iap->ia_valid & ATTR_ATIME_SET) {
1163 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1164 ts = timespec64_to_timespec(iap->ia_atime);
1165 p = xdr_encode_nfstime4(p, &ts);
1166 } else
1167 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1168 }
1169 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1170 if (iap->ia_valid & ATTR_MTIME_SET) {
1171 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
1172 ts = timespec64_to_timespec(iap->ia_mtime);
1173 p = xdr_encode_nfstime4(p, &ts);
1174 } else
1175 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
1176 }
1177 if (label && (bmval[2] & FATTR4_WORD2_SECURITY_LABEL)) {
1178 *p++ = cpu_to_be32(label->lfs);
1179 *p++ = cpu_to_be32(label->pi);
1180 *p++ = cpu_to_be32(label->len);
1181 p = xdr_encode_opaque_fixed(p, label->label, label->len);
1182 }
1183 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
1184 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
1185 *p++ = cpu_to_be32(*umask);
1186 }
1187
1188/* out: */
1189}
1190
1191static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
1192{
1193 encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
1194 encode_uint32(xdr, access);
1195}
1196
1197static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1198{
1199 encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
1200 encode_nfs4_seqid(xdr, arg->seqid);
1201 encode_nfs4_stateid(xdr, &arg->stateid);
1202}
1203
1204static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
1205{
1206 __be32 *p;
1207
1208 encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
1209 p = reserve_space(xdr, 12);
1210 p = xdr_encode_hyper(p, args->offset);
1211 *p = cpu_to_be32(args->count);
1212}
1213
1214static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1215{
1216 __be32 *p;
1217
1218 encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
1219 encode_uint32(xdr, create->ftype);
1220
1221 switch (create->ftype) {
1222 case NF4LNK:
1223 p = reserve_space(xdr, 4);
1224 *p = cpu_to_be32(create->u.symlink.len);
1225 xdr_write_pages(xdr, create->u.symlink.pages, 0,
1226 create->u.symlink.len);
1227 xdr->buf->flags |= XDRBUF_WRITE;
1228 break;
1229
1230 case NF4BLK: case NF4CHR:
1231 p = reserve_space(xdr, 8);
1232 *p++ = cpu_to_be32(create->u.device.specdata1);
1233 *p = cpu_to_be32(create->u.device.specdata2);
1234 break;
1235
1236 default:
1237 break;
1238 }
1239
1240 encode_string(xdr, create->name->len, create->name->name);
1241 encode_attrs(xdr, create->attrs, create->label, &create->umask,
1242 create->server, create->server->attr_bitmask);
1243}
1244
1245static void encode_getattr(struct xdr_stream *xdr,
1246 const __u32 *bitmap, const __u32 *mask, size_t len,
1247 struct compound_hdr *hdr)
1248{
1249 __u32 masked_bitmap[nfs4_fattr_bitmap_maxsz];
1250
1251 encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
1252 if (mask) {
1253 if (WARN_ON_ONCE(len > ARRAY_SIZE(masked_bitmap)))
1254 len = ARRAY_SIZE(masked_bitmap);
1255 len = mask_bitmap4(bitmap, mask, masked_bitmap, len);
1256 bitmap = masked_bitmap;
1257 }
1258 xdr_encode_bitmap4(xdr, bitmap, len);
1259}
1260
1261static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1262{
1263 encode_getattr(xdr, nfs4_fattr_bitmap, bitmask,
1264 ARRAY_SIZE(nfs4_fattr_bitmap), hdr);
1265}
1266
1267static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
1268 const u32 *open_bitmap,
1269 struct compound_hdr *hdr)
1270{
1271 encode_getattr(xdr, open_bitmap, bitmask, 3, hdr);
1272}
1273
1274static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1275{
1276 encode_getattr(xdr, nfs4_fsinfo_bitmap, bitmask,
1277 ARRAY_SIZE(nfs4_fsinfo_bitmap), hdr);
1278}
1279
1280static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1281{
1282 encode_getattr(xdr, nfs4_fs_locations_bitmap, bitmask,
1283 ARRAY_SIZE(nfs4_fs_locations_bitmap), hdr);
1284}
1285
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_lookupp(struct xdr_stream *xdr, struct compound_hdr *hdr)
1388{
1389 encode_op_hdr(xdr, OP_LOOKUPP, decode_lookupp_maxsz, hdr);
1390}
1391
1392static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
1393{
1394 __be32 *p;
1395
1396 p = reserve_space(xdr, 8);
1397 *p++ = cpu_to_be32(share_access);
1398 *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
1399}
1400
1401static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1402{
1403 __be32 *p;
1404 /*
1405 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1406 * owner 4 = 32
1407 */
1408 encode_nfs4_seqid(xdr, arg->seqid);
1409 encode_share_access(xdr, arg->share_access);
1410 p = reserve_space(xdr, 36);
1411 p = xdr_encode_hyper(p, arg->clientid);
1412 *p++ = cpu_to_be32(24);
1413 p = xdr_encode_opaque_fixed(p, "open id:", 8);
1414 *p++ = cpu_to_be32(arg->server->s_dev);
1415 *p++ = cpu_to_be32(arg->id.uniquifier);
1416 xdr_encode_hyper(p, arg->id.create_time);
1417}
1418
1419static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1420{
1421 __be32 *p;
1422
1423 p = reserve_space(xdr, 4);
1424 switch(arg->createmode) {
1425 case NFS4_CREATE_UNCHECKED:
1426 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1427 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1428 arg->server, arg->server->attr_bitmask);
1429 break;
1430 case NFS4_CREATE_GUARDED:
1431 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1432 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1433 arg->server, arg->server->attr_bitmask);
1434 break;
1435 case NFS4_CREATE_EXCLUSIVE:
1436 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1437 encode_nfs4_verifier(xdr, &arg->u.verifier);
1438 break;
1439 case NFS4_CREATE_EXCLUSIVE4_1:
1440 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1441 encode_nfs4_verifier(xdr, &arg->u.verifier);
1442 encode_attrs(xdr, arg->u.attrs, arg->label, &arg->umask,
1443 arg->server, arg->server->exclcreat_bitmask);
1444 }
1445}
1446
1447static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1448{
1449 __be32 *p;
1450
1451 p = reserve_space(xdr, 4);
1452 switch (arg->open_flags & O_CREAT) {
1453 case 0:
1454 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1455 break;
1456 default:
1457 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1458 encode_createmode(xdr, arg);
1459 }
1460}
1461
1462static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1463{
1464 __be32 *p;
1465
1466 p = reserve_space(xdr, 4);
1467 switch (delegation_type) {
1468 case 0:
1469 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1470 break;
1471 case FMODE_READ:
1472 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1473 break;
1474 case FMODE_WRITE|FMODE_READ:
1475 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1476 break;
1477 default:
1478 BUG();
1479 }
1480}
1481
1482static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1483{
1484 __be32 *p;
1485
1486 p = reserve_space(xdr, 4);
1487 *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1488 encode_string(xdr, name->len, name->name);
1489}
1490
1491static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1492{
1493 __be32 *p;
1494
1495 p = reserve_space(xdr, 4);
1496 *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1497 encode_delegation_type(xdr, type);
1498}
1499
1500static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1501{
1502 __be32 *p;
1503
1504 p = reserve_space(xdr, 4);
1505 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1506 encode_nfs4_stateid(xdr, stateid);
1507 encode_string(xdr, name->len, name->name);
1508}
1509
1510static inline void encode_claim_fh(struct xdr_stream *xdr)
1511{
1512 __be32 *p;
1513
1514 p = reserve_space(xdr, 4);
1515 *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
1516}
1517
1518static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1519{
1520 __be32 *p;
1521
1522 p = reserve_space(xdr, 4);
1523 *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1524 encode_nfs4_stateid(xdr, stateid);
1525}
1526
1527static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1528{
1529 encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
1530 encode_openhdr(xdr, arg);
1531 encode_opentype(xdr, arg);
1532 switch (arg->claim) {
1533 case NFS4_OPEN_CLAIM_NULL:
1534 encode_claim_null(xdr, arg->name);
1535 break;
1536 case NFS4_OPEN_CLAIM_PREVIOUS:
1537 encode_claim_previous(xdr, arg->u.delegation_type);
1538 break;
1539 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1540 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1541 break;
1542 case NFS4_OPEN_CLAIM_FH:
1543 encode_claim_fh(xdr);
1544 break;
1545 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1546 encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
1547 break;
1548 default:
1549 BUG();
1550 }
1551}
1552
1553static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1554{
1555 encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
1556 encode_nfs4_stateid(xdr, arg->stateid);
1557 encode_nfs4_seqid(xdr, arg->seqid);
1558}
1559
1560static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1561{
1562 encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
1563 encode_nfs4_stateid(xdr, &arg->stateid);
1564 encode_nfs4_seqid(xdr, arg->seqid);
1565 encode_share_access(xdr, arg->share_access);
1566}
1567
1568static void
1569encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1570{
1571 encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
1572 encode_string(xdr, fh->size, fh->data);
1573}
1574
1575static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1576{
1577 encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
1578}
1579
1580static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1581 struct compound_hdr *hdr)
1582{
1583 __be32 *p;
1584
1585 encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
1586 encode_nfs4_stateid(xdr, &args->stateid);
1587
1588 p = reserve_space(xdr, 12);
1589 p = xdr_encode_hyper(p, args->offset);
1590 *p = cpu_to_be32(args->count);
1591}
1592
1593static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1594{
1595 uint32_t attrs[3] = {
1596 FATTR4_WORD0_RDATTR_ERROR,
1597 FATTR4_WORD1_MOUNTED_ON_FILEID,
1598 };
1599 uint32_t dircount = readdir->count >> 1;
1600 __be32 *p, verf[2];
1601 uint32_t attrlen = 0;
1602 unsigned int i;
1603
1604 if (readdir->plus) {
1605 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1606 FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
1607 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1608 FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1609 FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1610 FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1611 attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
1612 dircount >>= 1;
1613 }
1614 /* Use mounted_on_fileid only if the server supports it */
1615 if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
1616 attrs[0] |= FATTR4_WORD0_FILEID;
1617 for (i = 0; i < ARRAY_SIZE(attrs); i++) {
1618 attrs[i] &= readdir->bitmask[i];
1619 if (attrs[i] != 0)
1620 attrlen = i+1;
1621 }
1622
1623 encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
1624 encode_uint64(xdr, readdir->cookie);
1625 encode_nfs4_verifier(xdr, &readdir->verifier);
1626 p = reserve_space(xdr, 12 + (attrlen << 2));
1627 *p++ = cpu_to_be32(dircount);
1628 *p++ = cpu_to_be32(readdir->count);
1629 *p++ = cpu_to_be32(attrlen);
1630 for (i = 0; i < attrlen; i++)
1631 *p++ = cpu_to_be32(attrs[i]);
1632 memcpy(verf, readdir->verifier.data, sizeof(verf));
1633
1634 dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
1635 __func__,
1636 (unsigned long long)readdir->cookie,
1637 verf[0], verf[1],
1638 attrs[0] & readdir->bitmask[0],
1639 attrs[1] & readdir->bitmask[1],
1640 attrs[2] & readdir->bitmask[2]);
1641}
1642
1643static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1644{
1645 encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
1646}
1647
1648static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1649{
1650 encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
1651 encode_string(xdr, name->len, name->name);
1652}
1653
1654static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1655{
1656 encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
1657 encode_string(xdr, oldname->len, oldname->name);
1658 encode_string(xdr, newname->len, newname->name);
1659}
1660
1661static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
1662 struct compound_hdr *hdr)
1663{
1664 encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
1665 encode_uint64(xdr, clid);
1666}
1667
1668static void
1669encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1670{
1671 encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
1672}
1673
1674static void
1675encode_setacl(struct xdr_stream *xdr, const struct nfs_setaclargs *arg,
1676 struct compound_hdr *hdr)
1677{
1678 __be32 *p;
1679
1680 encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
1681 encode_nfs4_stateid(xdr, &zero_stateid);
1682 p = reserve_space(xdr, 2*4);
1683 *p++ = cpu_to_be32(1);
1684 *p = cpu_to_be32(FATTR4_WORD0_ACL);
1685 p = reserve_space(xdr, 4);
1686 *p = cpu_to_be32(arg->acl_len);
1687 xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
1688}
1689
1690static void
1691encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1692{
1693 encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
1694}
1695
1696static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1697{
1698 encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
1699 encode_nfs4_stateid(xdr, &arg->stateid);
1700 encode_attrs(xdr, arg->iap, arg->label, NULL, server,
1701 server->attr_bitmask);
1702}
1703
1704static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1705{
1706 __be32 *p;
1707
1708 encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
1709 encode_nfs4_verifier(xdr, setclientid->sc_verifier);
1710
1711 encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
1712 setclientid->sc_clnt->cl_owner_id);
1713 p = reserve_space(xdr, 4);
1714 *p = cpu_to_be32(setclientid->sc_prog);
1715 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1716 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1717 p = reserve_space(xdr, 4);
1718 *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
1719}
1720
1721static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1722{
1723 encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
1724 decode_setclientid_confirm_maxsz, hdr);
1725 encode_uint64(xdr, arg->clientid);
1726 encode_nfs4_verifier(xdr, &arg->confirm);
1727}
1728
1729static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
1730 struct compound_hdr *hdr)
1731{
1732 __be32 *p;
1733
1734 encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
1735 encode_nfs4_stateid(xdr, &args->stateid);
1736
1737 p = reserve_space(xdr, 16);
1738 p = xdr_encode_hyper(p, args->offset);
1739 *p++ = cpu_to_be32(args->stable);
1740 *p = cpu_to_be32(args->count);
1741
1742 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1743}
1744
1745static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1746{
1747 encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
1748 encode_nfs4_stateid(xdr, stateid);
1749}
1750
1751static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1752{
1753 encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
1754 encode_string(xdr, name->len, name->name);
1755}
1756
1757#if defined(CONFIG_NFS_V4_1)
1758/* NFSv4.1 operations */
1759static void encode_bind_conn_to_session(struct xdr_stream *xdr,
1760 const struct nfs41_bind_conn_to_session_args *args,
1761 struct compound_hdr *hdr)
1762{
1763 __be32 *p;
1764
1765 encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
1766 decode_bind_conn_to_session_maxsz, hdr);
1767 encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1768 p = xdr_reserve_space(xdr, 8);
1769 *p++ = cpu_to_be32(args->dir);
1770 *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
1771}
1772
1773static void encode_op_map(struct xdr_stream *xdr, const struct nfs4_op_map *op_map)
1774{
1775 unsigned int i;
1776 encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
1777 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
1778 encode_uint32(xdr, op_map->u.words[i]);
1779}
1780
1781static void encode_exchange_id(struct xdr_stream *xdr,
1782 const struct nfs41_exchange_id_args *args,
1783 struct compound_hdr *hdr)
1784{
1785 __be32 *p;
1786 char impl_name[IMPL_NAME_LIMIT];
1787 int len = 0;
1788
1789 encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
1790 encode_nfs4_verifier(xdr, &args->verifier);
1791
1792 encode_string(xdr, strlen(args->client->cl_owner_id),
1793 args->client->cl_owner_id);
1794
1795 encode_uint32(xdr, args->flags);
1796 encode_uint32(xdr, args->state_protect.how);
1797
1798 switch (args->state_protect.how) {
1799 case SP4_NONE:
1800 break;
1801 case SP4_MACH_CRED:
1802 encode_op_map(xdr, &args->state_protect.enforce);
1803 encode_op_map(xdr, &args->state_protect.allow);
1804 break;
1805 default:
1806 WARN_ON_ONCE(1);
1807 break;
1808 }
1809
1810 if (send_implementation_id &&
1811 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
1812 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
1813 <= sizeof(impl_name) + 1)
1814 len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
1815 utsname()->sysname, utsname()->release,
1816 utsname()->version, utsname()->machine);
1817
1818 if (len > 0) {
1819 encode_uint32(xdr, 1); /* implementation id array length=1 */
1820
1821 encode_string(xdr,
1822 sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
1823 CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
1824 encode_string(xdr, len, impl_name);
1825 /* just send zeros for nii_date - the date is in nii_name */
1826 p = reserve_space(xdr, 12);
1827 p = xdr_encode_hyper(p, 0);
1828 *p = cpu_to_be32(0);
1829 } else
1830 encode_uint32(xdr, 0); /* implementation id array length=0 */
1831}
1832
1833static void encode_create_session(struct xdr_stream *xdr,
1834 const struct nfs41_create_session_args *args,
1835 struct compound_hdr *hdr)
1836{
1837 __be32 *p;
1838 struct nfs_client *clp = args->client;
1839 struct rpc_clnt *clnt = clp->cl_rpcclient;
1840 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
1841 u32 max_resp_sz_cached;
1842
1843 /*
1844 * Assumes OPEN is the biggest non-idempotent compound.
1845 * 2 is the verifier.
1846 */
1847 max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE + 2)
1848 * XDR_UNIT + RPC_MAX_AUTH_SIZE;
1849
1850 encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
1851 p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
1852 p = xdr_encode_hyper(p, args->clientid);
1853 *p++ = cpu_to_be32(args->seqid); /*Sequence id */
1854 *p++ = cpu_to_be32(args->flags); /*flags */
1855
1856 /* Fore Channel */
1857 *p++ = cpu_to_be32(0); /* header padding size */
1858 *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1859 *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1860 *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
1861 *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
1862 *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
1863 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1864
1865 /* Back Channel */
1866 *p++ = cpu_to_be32(0); /* header padding size */
1867 *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1868 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1869 *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
1870 *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
1871 *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
1872 *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
1873
1874 *p++ = cpu_to_be32(args->cb_program); /* cb_program */
1875 *p++ = cpu_to_be32(1);
1876 *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
1877
1878 /* authsys_parms rfc1831 */
1879 *p++ = cpu_to_be32(ktime_to_ns(nn->boot_time)); /* stamp */
1880 p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
1881 *p++ = cpu_to_be32(0); /* UID */
1882 *p++ = cpu_to_be32(0); /* GID */
1883 *p = cpu_to_be32(0); /* No more gids */
1884}
1885
1886static void encode_destroy_session(struct xdr_stream *xdr,
1887 const struct nfs4_session *session,
1888 struct compound_hdr *hdr)
1889{
1890 encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
1891 encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1892}
1893
1894static void encode_destroy_clientid(struct xdr_stream *xdr,
1895 uint64_t clientid,
1896 struct compound_hdr *hdr)
1897{
1898 encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
1899 encode_uint64(xdr, clientid);
1900}
1901
1902static void encode_reclaim_complete(struct xdr_stream *xdr,
1903 const struct nfs41_reclaim_complete_args *args,
1904 struct compound_hdr *hdr)
1905{
1906 encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
1907 encode_uint32(xdr, args->one_fs);
1908}
1909#endif /* CONFIG_NFS_V4_1 */
1910
1911static void encode_sequence(struct xdr_stream *xdr,
1912 const struct nfs4_sequence_args *args,
1913 struct compound_hdr *hdr)
1914{
1915#if defined(CONFIG_NFS_V4_1)
1916 struct nfs4_session *session;
1917 struct nfs4_slot_table *tp;
1918 struct nfs4_slot *slot = args->sa_slot;
1919 __be32 *p;
1920
1921 tp = slot->table;
1922 session = tp->session;
1923 if (!session)
1924 return;
1925
1926 encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
1927
1928 /*
1929 * Sessionid + seqid + slotid + max slotid + cache_this
1930 */
1931 dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1932 "max_slotid=%d cache_this=%d\n",
1933 __func__,
1934 ((u32 *)session->sess_id.data)[0],
1935 ((u32 *)session->sess_id.data)[1],
1936 ((u32 *)session->sess_id.data)[2],
1937 ((u32 *)session->sess_id.data)[3],
1938 slot->seq_nr, slot->slot_nr,
1939 tp->highest_used_slotid, args->sa_cache_this);
1940 p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
1941 p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1942 *p++ = cpu_to_be32(slot->seq_nr);
1943 *p++ = cpu_to_be32(slot->slot_nr);
1944 *p++ = cpu_to_be32(tp->highest_used_slotid);
1945 *p = cpu_to_be32(args->sa_cache_this);
1946#endif /* CONFIG_NFS_V4_1 */
1947}
1948
1949#ifdef CONFIG_NFS_V4_1
1950static void
1951encode_getdeviceinfo(struct xdr_stream *xdr,
1952 const struct nfs4_getdeviceinfo_args *args,
1953 struct compound_hdr *hdr)
1954{
1955 __be32 *p;
1956
1957 encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
1958 p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
1959 p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1960 NFS4_DEVICEID4_SIZE);
1961 *p++ = cpu_to_be32(args->pdev->layout_type);
1962 *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */
1963
1964 p = reserve_space(xdr, 4 + 4);
1965 *p++ = cpu_to_be32(1); /* bitmap length */
1966 *p++ = cpu_to_be32(args->notify_types);
1967}
1968
1969static void
1970encode_layoutget(struct xdr_stream *xdr,
1971 const struct nfs4_layoutget_args *args,
1972 struct compound_hdr *hdr)
1973{
1974 __be32 *p;
1975
1976 encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
1977 p = reserve_space(xdr, 36);
1978 *p++ = cpu_to_be32(0); /* Signal layout available */
1979 *p++ = cpu_to_be32(args->type);
1980 *p++ = cpu_to_be32(args->range.iomode);
1981 p = xdr_encode_hyper(p, args->range.offset);
1982 p = xdr_encode_hyper(p, args->range.length);
1983 p = xdr_encode_hyper(p, args->minlength);
1984 encode_nfs4_stateid(xdr, &args->stateid);
1985 encode_uint32(xdr, args->maxcount);
1986
1987 dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1988 __func__,
1989 args->type,
1990 args->range.iomode,
1991 (unsigned long)args->range.offset,
1992 (unsigned long)args->range.length,
1993 args->maxcount);
1994}
1995
1996static int
1997encode_layoutcommit(struct xdr_stream *xdr,
1998 struct inode *inode,
1999 const struct nfs4_layoutcommit_args *args,
2000 struct compound_hdr *hdr)
2001{
2002 __be32 *p;
2003
2004 dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
2005 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
2006
2007 encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
2008 p = reserve_space(xdr, 20);
2009 /* Only whole file layouts */
2010 p = xdr_encode_hyper(p, 0); /* offset */
2011 p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
2012 *p = cpu_to_be32(0); /* reclaim */
2013 encode_nfs4_stateid(xdr, &args->stateid);
2014 if (args->lastbytewritten != U64_MAX) {
2015 p = reserve_space(xdr, 20);
2016 *p++ = cpu_to_be32(1); /* newoffset = TRUE */
2017 p = xdr_encode_hyper(p, args->lastbytewritten);
2018 } else {
2019 p = reserve_space(xdr, 12);
2020 *p++ = cpu_to_be32(0); /* newoffset = FALSE */
2021 }
2022 *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
2023 *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
2024
2025 encode_uint32(xdr, args->layoutupdate_len);
2026 if (args->layoutupdate_pages)
2027 xdr_write_pages(xdr, args->layoutupdate_pages, 0,
2028 args->layoutupdate_len);
2029
2030 return 0;
2031}
2032
2033static void
2034encode_layoutreturn(struct xdr_stream *xdr,
2035 const struct nfs4_layoutreturn_args *args,
2036 struct compound_hdr *hdr)
2037{
2038 __be32 *p;
2039
2040 encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
2041 p = reserve_space(xdr, 16);
2042 *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
2043 *p++ = cpu_to_be32(args->layout_type);
2044 *p++ = cpu_to_be32(args->range.iomode);
2045 *p = cpu_to_be32(RETURN_FILE);
2046 p = reserve_space(xdr, 16);
2047 p = xdr_encode_hyper(p, args->range.offset);
2048 p = xdr_encode_hyper(p, args->range.length);
2049 spin_lock(&args->inode->i_lock);
2050 encode_nfs4_stateid(xdr, &args->stateid);
2051 spin_unlock(&args->inode->i_lock);
2052 if (args->ld_private->ops && args->ld_private->ops->encode)
2053 args->ld_private->ops->encode(xdr, args, args->ld_private);
2054 else
2055 encode_uint32(xdr, 0);
2056}
2057
2058static int
2059encode_secinfo_no_name(struct xdr_stream *xdr,
2060 const struct nfs41_secinfo_no_name_args *args,
2061 struct compound_hdr *hdr)
2062{
2063 encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
2064 encode_uint32(xdr, args->style);
2065 return 0;
2066}
2067
2068static void encode_test_stateid(struct xdr_stream *xdr,
2069 const struct nfs41_test_stateid_args *args,
2070 struct compound_hdr *hdr)
2071{
2072 encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
2073 encode_uint32(xdr, 1);
2074 encode_nfs4_stateid(xdr, args->stateid);
2075}
2076
2077static void encode_free_stateid(struct xdr_stream *xdr,
2078 const struct nfs41_free_stateid_args *args,
2079 struct compound_hdr *hdr)
2080{
2081 encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
2082 encode_nfs4_stateid(xdr, &args->stateid);
2083}
2084#else
2085static inline void
2086encode_layoutreturn(struct xdr_stream *xdr,
2087 const struct nfs4_layoutreturn_args *args,
2088 struct compound_hdr *hdr)
2089{
2090}
2091
2092static void
2093encode_layoutget(struct xdr_stream *xdr,
2094 const struct nfs4_layoutget_args *args,
2095 struct compound_hdr *hdr)
2096{
2097}
2098#endif /* CONFIG_NFS_V4_1 */
2099
2100/*
2101 * END OF "GENERIC" ENCODE ROUTINES.
2102 */
2103
2104static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
2105{
2106#if defined(CONFIG_NFS_V4_1)
2107 struct nfs4_session *session = args->sa_slot->table->session;
2108 if (session)
2109 return session->clp->cl_mvops->minor_version;
2110#endif /* CONFIG_NFS_V4_1 */
2111 return 0;
2112}
2113
2114/*
2115 * Encode an ACCESS request
2116 */
2117static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
2118 const void *data)
2119{
2120 const struct nfs4_accessargs *args = data;
2121 struct compound_hdr hdr = {
2122 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2123 };
2124
2125 encode_compound_hdr(xdr, req, &hdr);
2126 encode_sequence(xdr, &args->seq_args, &hdr);
2127 encode_putfh(xdr, args->fh, &hdr);
2128 encode_access(xdr, args->access, &hdr);
2129 if (args->bitmask)
2130 encode_getfattr(xdr, args->bitmask, &hdr);
2131 encode_nops(&hdr);
2132}
2133
2134/*
2135 * Encode LOOKUP request
2136 */
2137static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
2138 const void *data)
2139{
2140 const struct nfs4_lookup_arg *args = data;
2141 struct compound_hdr hdr = {
2142 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2143 };
2144
2145 encode_compound_hdr(xdr, req, &hdr);
2146 encode_sequence(xdr, &args->seq_args, &hdr);
2147 encode_putfh(xdr, args->dir_fh, &hdr);
2148 encode_lookup(xdr, args->name, &hdr);
2149 encode_getfh(xdr, &hdr);
2150 encode_getfattr(xdr, args->bitmask, &hdr);
2151 encode_nops(&hdr);
2152}
2153
2154/*
2155 * Encode LOOKUPP request
2156 */
2157static void nfs4_xdr_enc_lookupp(struct rpc_rqst *req, struct xdr_stream *xdr,
2158 const void *data)
2159{
2160 const struct nfs4_lookupp_arg *args = data;
2161 struct compound_hdr hdr = {
2162 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2163 };
2164
2165 encode_compound_hdr(xdr, req, &hdr);
2166 encode_sequence(xdr, &args->seq_args, &hdr);
2167 encode_putfh(xdr, args->fh, &hdr);
2168 encode_lookupp(xdr, &hdr);
2169 encode_getfh(xdr, &hdr);
2170 encode_getfattr(xdr, args->bitmask, &hdr);
2171 encode_nops(&hdr);
2172}
2173
2174/*
2175 * Encode LOOKUP_ROOT request
2176 */
2177static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
2178 struct xdr_stream *xdr,
2179 const void *data)
2180{
2181 const struct nfs4_lookup_root_arg *args = data;
2182 struct compound_hdr hdr = {
2183 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2184 };
2185
2186 encode_compound_hdr(xdr, req, &hdr);
2187 encode_sequence(xdr, &args->seq_args, &hdr);
2188 encode_putrootfh(xdr, &hdr);
2189 encode_getfh(xdr, &hdr);
2190 encode_getfattr(xdr, args->bitmask, &hdr);
2191 encode_nops(&hdr);
2192}
2193
2194/*
2195 * Encode REMOVE request
2196 */
2197static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
2198 const void *data)
2199{
2200 const struct nfs_removeargs *args = data;
2201 struct compound_hdr hdr = {
2202 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2203 };
2204
2205 encode_compound_hdr(xdr, req, &hdr);
2206 encode_sequence(xdr, &args->seq_args, &hdr);
2207 encode_putfh(xdr, args->fh, &hdr);
2208 encode_remove(xdr, &args->name, &hdr);
2209 encode_nops(&hdr);
2210}
2211
2212/*
2213 * Encode RENAME request
2214 */
2215static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
2216 const void *data)
2217{
2218 const struct nfs_renameargs *args = data;
2219 struct compound_hdr hdr = {
2220 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2221 };
2222
2223 encode_compound_hdr(xdr, req, &hdr);
2224 encode_sequence(xdr, &args->seq_args, &hdr);
2225 encode_putfh(xdr, args->old_dir, &hdr);
2226 encode_savefh(xdr, &hdr);
2227 encode_putfh(xdr, args->new_dir, &hdr);
2228 encode_rename(xdr, args->old_name, args->new_name, &hdr);
2229 encode_nops(&hdr);
2230}
2231
2232/*
2233 * Encode LINK request
2234 */
2235static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2236 const void *data)
2237{
2238 const struct nfs4_link_arg *args = data;
2239 struct compound_hdr hdr = {
2240 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2241 };
2242
2243 encode_compound_hdr(xdr, req, &hdr);
2244 encode_sequence(xdr, &args->seq_args, &hdr);
2245 encode_putfh(xdr, args->fh, &hdr);
2246 encode_savefh(xdr, &hdr);
2247 encode_putfh(xdr, args->dir_fh, &hdr);
2248 encode_link(xdr, args->name, &hdr);
2249 encode_restorefh(xdr, &hdr);
2250 encode_getfattr(xdr, args->bitmask, &hdr);
2251 encode_nops(&hdr);
2252}
2253
2254/*
2255 * Encode CREATE request
2256 */
2257static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2258 const void *data)
2259{
2260 const struct nfs4_create_arg *args = data;
2261 struct compound_hdr hdr = {
2262 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2263 };
2264
2265 encode_compound_hdr(xdr, req, &hdr);
2266 encode_sequence(xdr, &args->seq_args, &hdr);
2267 encode_putfh(xdr, args->dir_fh, &hdr);
2268 encode_create(xdr, args, &hdr);
2269 encode_getfh(xdr, &hdr);
2270 encode_getfattr(xdr, args->bitmask, &hdr);
2271 encode_nops(&hdr);
2272}
2273
2274/*
2275 * Encode SYMLINK request
2276 */
2277static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2278 const void *data)
2279{
2280 const struct nfs4_create_arg *args = data;
2281
2282 nfs4_xdr_enc_create(req, xdr, args);
2283}
2284
2285/*
2286 * Encode GETATTR request
2287 */
2288static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2289 const void *data)
2290{
2291 const struct nfs4_getattr_arg *args = data;
2292 struct compound_hdr hdr = {
2293 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2294 };
2295
2296 encode_compound_hdr(xdr, req, &hdr);
2297 encode_sequence(xdr, &args->seq_args, &hdr);
2298 encode_putfh(xdr, args->fh, &hdr);
2299 encode_getfattr(xdr, args->bitmask, &hdr);
2300 encode_nops(&hdr);
2301}
2302
2303/*
2304 * Encode a CLOSE request
2305 */
2306static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2307 const void *data)
2308{
2309 const struct nfs_closeargs *args = data;
2310 struct compound_hdr hdr = {
2311 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2312 };
2313
2314 encode_compound_hdr(xdr, req, &hdr);
2315 encode_sequence(xdr, &args->seq_args, &hdr);
2316 encode_putfh(xdr, args->fh, &hdr);
2317 if (args->lr_args)
2318 encode_layoutreturn(xdr, args->lr_args, &hdr);
2319 if (args->bitmask != NULL)
2320 encode_getfattr(xdr, args->bitmask, &hdr);
2321 encode_close(xdr, args, &hdr);
2322 encode_nops(&hdr);
2323}
2324
2325/*
2326 * Encode an OPEN request
2327 */
2328static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2329 const void *data)
2330{
2331 const struct nfs_openargs *args = data;
2332 struct compound_hdr hdr = {
2333 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2334 };
2335
2336 encode_compound_hdr(xdr, req, &hdr);
2337 encode_sequence(xdr, &args->seq_args, &hdr);
2338 encode_putfh(xdr, args->fh, &hdr);
2339 encode_open(xdr, args, &hdr);
2340 encode_getfh(xdr, &hdr);
2341 if (args->access)
2342 encode_access(xdr, args->access, &hdr);
2343 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2344 if (args->lg_args) {
2345 encode_layoutget(xdr, args->lg_args, &hdr);
2346 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2347 args->lg_args->layout.pglen,
2348 hdr.replen);
2349 }
2350 encode_nops(&hdr);
2351}
2352
2353/*
2354 * Encode an OPEN_CONFIRM request
2355 */
2356static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2357 struct xdr_stream *xdr,
2358 const void *data)
2359{
2360 const struct nfs_open_confirmargs *args = data;
2361 struct compound_hdr hdr = {
2362 .nops = 0,
2363 };
2364
2365 encode_compound_hdr(xdr, req, &hdr);
2366 encode_putfh(xdr, args->fh, &hdr);
2367 encode_open_confirm(xdr, args, &hdr);
2368 encode_nops(&hdr);
2369}
2370
2371/*
2372 * Encode an OPEN request with no attributes.
2373 */
2374static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2375 struct xdr_stream *xdr,
2376 const void *data)
2377{
2378 const struct nfs_openargs *args = data;
2379 struct compound_hdr hdr = {
2380 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2381 };
2382
2383 encode_compound_hdr(xdr, req, &hdr);
2384 encode_sequence(xdr, &args->seq_args, &hdr);
2385 encode_putfh(xdr, args->fh, &hdr);
2386 encode_open(xdr, args, &hdr);
2387 if (args->access)
2388 encode_access(xdr, args->access, &hdr);
2389 encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
2390 if (args->lg_args) {
2391 encode_layoutget(xdr, args->lg_args, &hdr);
2392 rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
2393 args->lg_args->layout.pglen,
2394 hdr.replen);
2395 }
2396 encode_nops(&hdr);
2397}
2398
2399/*
2400 * Encode an OPEN_DOWNGRADE request
2401 */
2402static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2403 struct xdr_stream *xdr,
2404 const void *data)
2405{
2406 const struct nfs_closeargs *args = data;
2407 struct compound_hdr hdr = {
2408 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2409 };
2410
2411 encode_compound_hdr(xdr, req, &hdr);
2412 encode_sequence(xdr, &args->seq_args, &hdr);
2413 encode_putfh(xdr, args->fh, &hdr);
2414 if (args->lr_args)
2415 encode_layoutreturn(xdr, args->lr_args, &hdr);
2416 encode_open_downgrade(xdr, args, &hdr);
2417 encode_nops(&hdr);
2418}
2419
2420/*
2421 * Encode a LOCK request
2422 */
2423static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2424 const void *data)
2425{
2426 const struct nfs_lock_args *args = data;
2427 struct compound_hdr hdr = {
2428 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2429 };
2430
2431 encode_compound_hdr(xdr, req, &hdr);
2432 encode_sequence(xdr, &args->seq_args, &hdr);
2433 encode_putfh(xdr, args->fh, &hdr);
2434 encode_lock(xdr, args, &hdr);
2435 encode_nops(&hdr);
2436}
2437
2438/*
2439 * Encode a LOCKT request
2440 */
2441static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2442 const void *data)
2443{
2444 const struct nfs_lockt_args *args = data;
2445 struct compound_hdr hdr = {
2446 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2447 };
2448
2449 encode_compound_hdr(xdr, req, &hdr);
2450 encode_sequence(xdr, &args->seq_args, &hdr);
2451 encode_putfh(xdr, args->fh, &hdr);
2452 encode_lockt(xdr, args, &hdr);
2453 encode_nops(&hdr);
2454}
2455
2456/*
2457 * Encode a LOCKU request
2458 */
2459static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2460 const void *data)
2461{
2462 const struct nfs_locku_args *args = data;
2463 struct compound_hdr hdr = {
2464 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2465 };
2466
2467 encode_compound_hdr(xdr, req, &hdr);
2468 encode_sequence(xdr, &args->seq_args, &hdr);
2469 encode_putfh(xdr, args->fh, &hdr);
2470 encode_locku(xdr, args, &hdr);
2471 encode_nops(&hdr);
2472}
2473
2474static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2475 struct xdr_stream *xdr,
2476 const void *data)
2477{
2478 const struct nfs_release_lockowner_args *args = data;
2479 struct compound_hdr hdr = {
2480 .minorversion = 0,
2481 };
2482
2483 encode_compound_hdr(xdr, req, &hdr);
2484 encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2485 encode_nops(&hdr);
2486}
2487
2488/*
2489 * Encode a READLINK request
2490 */
2491static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2492 const void *data)
2493{
2494 const struct nfs4_readlink *args = data;
2495 struct compound_hdr hdr = {
2496 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2497 };
2498
2499 encode_compound_hdr(xdr, req, &hdr);
2500 encode_sequence(xdr, &args->seq_args, &hdr);
2501 encode_putfh(xdr, args->fh, &hdr);
2502 encode_readlink(xdr, args, req, &hdr);
2503
2504 rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2505 args->pglen, hdr.replen);
2506 encode_nops(&hdr);
2507}
2508
2509/*
2510 * Encode a READDIR request
2511 */
2512static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2513 const void *data)
2514{
2515 const struct nfs4_readdir_arg *args = data;
2516 struct compound_hdr hdr = {
2517 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2518 };
2519
2520 encode_compound_hdr(xdr, req, &hdr);
2521 encode_sequence(xdr, &args->seq_args, &hdr);
2522 encode_putfh(xdr, args->fh, &hdr);
2523 encode_readdir(xdr, args, req, &hdr);
2524
2525 rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2526 args->count, hdr.replen);
2527 encode_nops(&hdr);
2528}
2529
2530/*
2531 * Encode a READ request
2532 */
2533static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2534 const void *data)
2535{
2536 const struct nfs_pgio_args *args = data;
2537 struct compound_hdr hdr = {
2538 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2539 };
2540
2541 encode_compound_hdr(xdr, req, &hdr);
2542 encode_sequence(xdr, &args->seq_args, &hdr);
2543 encode_putfh(xdr, args->fh, &hdr);
2544 encode_read(xdr, args, &hdr);
2545
2546 rpc_prepare_reply_pages(req, args->pages, args->pgbase,
2547 args->count, hdr.replen);
2548 req->rq_rcv_buf.flags |= XDRBUF_READ;
2549 encode_nops(&hdr);
2550}
2551
2552/*
2553 * Encode an SETATTR request
2554 */
2555static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2556 const void *data)
2557{
2558 const struct nfs_setattrargs *args = data;
2559 struct compound_hdr hdr = {
2560 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2561 };
2562
2563 encode_compound_hdr(xdr, req, &hdr);
2564 encode_sequence(xdr, &args->seq_args, &hdr);
2565 encode_putfh(xdr, args->fh, &hdr);
2566 encode_setattr(xdr, args, args->server, &hdr);
2567 encode_getfattr(xdr, args->bitmask, &hdr);
2568 encode_nops(&hdr);
2569}
2570
2571/*
2572 * Encode a GETACL request
2573 */
2574static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2575 const void *data)
2576{
2577 const struct nfs_getaclargs *args = data;
2578 struct compound_hdr hdr = {
2579 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2580 };
2581 const __u32 nfs4_acl_bitmap[1] = {
2582 [0] = FATTR4_WORD0_ACL,
2583 };
2584 uint32_t replen;
2585
2586 encode_compound_hdr(xdr, req, &hdr);
2587 encode_sequence(xdr, &args->seq_args, &hdr);
2588 encode_putfh(xdr, args->fh, &hdr);
2589 replen = hdr.replen + op_decode_hdr_maxsz;
2590 encode_getattr(xdr, nfs4_acl_bitmap, NULL,
2591 ARRAY_SIZE(nfs4_acl_bitmap), &hdr);
2592
2593 rpc_prepare_reply_pages(req, args->acl_pages, 0,
2594 args->acl_len, replen + 1);
2595 encode_nops(&hdr);
2596}
2597
2598/*
2599 * Encode a WRITE request
2600 */
2601static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2602 const void *data)
2603{
2604 const struct nfs_pgio_args *args = data;
2605 struct compound_hdr hdr = {
2606 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2607 };
2608
2609 encode_compound_hdr(xdr, req, &hdr);
2610 encode_sequence(xdr, &args->seq_args, &hdr);
2611 encode_putfh(xdr, args->fh, &hdr);
2612 encode_write(xdr, args, &hdr);
2613 req->rq_snd_buf.flags |= XDRBUF_WRITE;
2614 if (args->bitmask)
2615 encode_getfattr(xdr, args->bitmask, &hdr);
2616 encode_nops(&hdr);
2617}
2618
2619/*
2620 * a COMMIT request
2621 */
2622static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2623 const void *data)
2624{
2625 const struct nfs_commitargs *args = data;
2626 struct compound_hdr hdr = {
2627 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2628 };
2629
2630 encode_compound_hdr(xdr, req, &hdr);
2631 encode_sequence(xdr, &args->seq_args, &hdr);
2632 encode_putfh(xdr, args->fh, &hdr);
2633 encode_commit(xdr, args, &hdr);
2634 encode_nops(&hdr);
2635}
2636
2637/*
2638 * FSINFO request
2639 */
2640static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2641 const void *data)
2642{
2643 const struct nfs4_fsinfo_arg *args = data;
2644 struct compound_hdr hdr = {
2645 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2646 };
2647
2648 encode_compound_hdr(xdr, req, &hdr);
2649 encode_sequence(xdr, &args->seq_args, &hdr);
2650 encode_putfh(xdr, args->fh, &hdr);
2651 encode_fsinfo(xdr, args->bitmask, &hdr);
2652 encode_nops(&hdr);
2653}
2654
2655/*
2656 * a PATHCONF request
2657 */
2658static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2659 const void *data)
2660{
2661 const struct nfs4_pathconf_arg *args = data;
2662 struct compound_hdr hdr = {
2663 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2664 };
2665
2666 encode_compound_hdr(xdr, req, &hdr);
2667 encode_sequence(xdr, &args->seq_args, &hdr);
2668 encode_putfh(xdr, args->fh, &hdr);
2669 encode_getattr(xdr, nfs4_pathconf_bitmap, args->bitmask,
2670 ARRAY_SIZE(nfs4_pathconf_bitmap), &hdr);
2671 encode_nops(&hdr);
2672}
2673
2674/*
2675 * a STATFS request
2676 */
2677static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2678 const void *data)
2679{
2680 const struct nfs4_statfs_arg *args = data;
2681 struct compound_hdr hdr = {
2682 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2683 };
2684
2685 encode_compound_hdr(xdr, req, &hdr);
2686 encode_sequence(xdr, &args->seq_args, &hdr);
2687 encode_putfh(xdr, args->fh, &hdr);
2688 encode_getattr(xdr, nfs4_statfs_bitmap, args->bitmask,
2689 ARRAY_SIZE(nfs4_statfs_bitmap), &hdr);
2690 encode_nops(&hdr);
2691}
2692
2693/*
2694 * GETATTR_BITMAP request
2695 */
2696static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2697 struct xdr_stream *xdr,
2698 const void *data)
2699{
2700 const struct nfs4_server_caps_arg *args = data;
2701 const u32 *bitmask = args->bitmask;
2702 struct compound_hdr hdr = {
2703 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2704 };
2705
2706 encode_compound_hdr(xdr, req, &hdr);
2707 encode_sequence(xdr, &args->seq_args, &hdr);
2708 encode_putfh(xdr, args->fhandle, &hdr);
2709 encode_getattr(xdr, bitmask, NULL, 3, &hdr);
2710 encode_nops(&hdr);
2711}
2712
2713/*
2714 * a RENEW request
2715 */
2716static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2717 const void *data)
2718
2719{
2720 const struct nfs_client *clp = data;
2721 struct compound_hdr hdr = {
2722 .nops = 0,
2723 };
2724
2725 encode_compound_hdr(xdr, req, &hdr);
2726 encode_renew(xdr, clp->cl_clientid, &hdr);
2727 encode_nops(&hdr);
2728}
2729
2730/*
2731 * a SETCLIENTID request
2732 */
2733static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2734 struct xdr_stream *xdr,
2735 const void *data)
2736{
2737 const struct nfs4_setclientid *sc = data;
2738 struct compound_hdr hdr = {
2739 .nops = 0,
2740 };
2741
2742 encode_compound_hdr(xdr, req, &hdr);
2743 encode_setclientid(xdr, sc, &hdr);
2744 encode_nops(&hdr);
2745}
2746
2747/*
2748 * a SETCLIENTID_CONFIRM request
2749 */
2750static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2751 struct xdr_stream *xdr,
2752 const void *data)
2753{
2754 const struct nfs4_setclientid_res *arg = data;
2755 struct compound_hdr hdr = {
2756 .nops = 0,
2757 };
2758
2759 encode_compound_hdr(xdr, req, &hdr);
2760 encode_setclientid_confirm(xdr, arg, &hdr);
2761 encode_nops(&hdr);
2762}
2763
2764/*
2765 * DELEGRETURN request
2766 */
2767static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2768 struct xdr_stream *xdr,
2769 const void *data)
2770{
2771 const struct nfs4_delegreturnargs *args = data;
2772 struct compound_hdr hdr = {
2773 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2774 };
2775
2776 encode_compound_hdr(xdr, req, &hdr);
2777 encode_sequence(xdr, &args->seq_args, &hdr);
2778 encode_putfh(xdr, args->fhandle, &hdr);
2779 if (args->lr_args)
2780 encode_layoutreturn(xdr, args->lr_args, &hdr);
2781 if (args->bitmask)
2782 encode_getfattr(xdr, args->bitmask, &hdr);
2783 encode_delegreturn(xdr, args->stateid, &hdr);
2784 encode_nops(&hdr);
2785}
2786
2787/*
2788 * Encode FS_LOCATIONS request
2789 */
2790static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2791 struct xdr_stream *xdr,
2792 const void *data)
2793{
2794 const struct nfs4_fs_locations_arg *args = data;
2795 struct compound_hdr hdr = {
2796 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2797 };
2798 uint32_t replen;
2799
2800 encode_compound_hdr(xdr, req, &hdr);
2801 encode_sequence(xdr, &args->seq_args, &hdr);
2802 if (args->migration) {
2803 encode_putfh(xdr, args->fh, &hdr);
2804 replen = hdr.replen;
2805 encode_fs_locations(xdr, args->bitmask, &hdr);
2806 if (args->renew)
2807 encode_renew(xdr, args->clientid, &hdr);
2808 } else {
2809 encode_putfh(xdr, args->dir_fh, &hdr);
2810 encode_lookup(xdr, args->name, &hdr);
2811 replen = hdr.replen;
2812 encode_fs_locations(xdr, args->bitmask, &hdr);
2813 }
2814
2815 rpc_prepare_reply_pages(req, (struct page **)&args->page, 0,
2816 PAGE_SIZE, replen + 1);
2817 encode_nops(&hdr);
2818}
2819
2820/*
2821 * Encode SECINFO request
2822 */
2823static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2824 struct xdr_stream *xdr,
2825 const void *data)
2826{
2827 const struct nfs4_secinfo_arg *args = data;
2828 struct compound_hdr hdr = {
2829 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2830 };
2831
2832 encode_compound_hdr(xdr, req, &hdr);
2833 encode_sequence(xdr, &args->seq_args, &hdr);
2834 encode_putfh(xdr, args->dir_fh, &hdr);
2835 encode_secinfo(xdr, args->name, &hdr);
2836 encode_nops(&hdr);
2837}
2838
2839/*
2840 * Encode FSID_PRESENT request
2841 */
2842static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
2843 struct xdr_stream *xdr,
2844 const void *data)
2845{
2846 const struct nfs4_fsid_present_arg *args = data;
2847 struct compound_hdr hdr = {
2848 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2849 };
2850
2851 encode_compound_hdr(xdr, req, &hdr);
2852 encode_sequence(xdr, &args->seq_args, &hdr);
2853 encode_putfh(xdr, args->fh, &hdr);
2854 encode_getfh(xdr, &hdr);
2855 if (args->renew)
2856 encode_renew(xdr, args->clientid, &hdr);
2857 encode_nops(&hdr);
2858}
2859
2860#if defined(CONFIG_NFS_V4_1)
2861/*
2862 * BIND_CONN_TO_SESSION request
2863 */
2864static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
2865 struct xdr_stream *xdr,
2866 const void *data)
2867{
2868 const struct nfs41_bind_conn_to_session_args *args = data;
2869 struct compound_hdr hdr = {
2870 .minorversion = args->client->cl_mvops->minor_version,
2871 };
2872
2873 encode_compound_hdr(xdr, req, &hdr);
2874 encode_bind_conn_to_session(xdr, args, &hdr);
2875 encode_nops(&hdr);
2876}
2877
2878/*
2879 * EXCHANGE_ID request
2880 */
2881static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2882 struct xdr_stream *xdr,
2883 const void *data)
2884{
2885 const struct nfs41_exchange_id_args *args = data;
2886 struct compound_hdr hdr = {
2887 .minorversion = args->client->cl_mvops->minor_version,
2888 };
2889
2890 encode_compound_hdr(xdr, req, &hdr);
2891 encode_exchange_id(xdr, args, &hdr);
2892 encode_nops(&hdr);
2893}
2894
2895/*
2896 * a CREATE_SESSION request
2897 */
2898static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2899 struct xdr_stream *xdr,
2900 const void *data)
2901{
2902 const struct nfs41_create_session_args *args = data;
2903 struct compound_hdr hdr = {
2904 .minorversion = args->client->cl_mvops->minor_version,
2905 };
2906
2907 encode_compound_hdr(xdr, req, &hdr);
2908 encode_create_session(xdr, args, &hdr);
2909 encode_nops(&hdr);
2910}
2911
2912/*
2913 * a DESTROY_SESSION request
2914 */
2915static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2916 struct xdr_stream *xdr,
2917 const void *data)
2918{
2919 const struct nfs4_session *session = data;
2920 struct compound_hdr hdr = {
2921 .minorversion = session->clp->cl_mvops->minor_version,
2922 };
2923
2924 encode_compound_hdr(xdr, req, &hdr);
2925 encode_destroy_session(xdr, session, &hdr);
2926 encode_nops(&hdr);
2927}
2928
2929/*
2930 * a DESTROY_CLIENTID request
2931 */
2932static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
2933 struct xdr_stream *xdr,
2934 const void *data)
2935{
2936 const struct nfs_client *clp = data;
2937 struct compound_hdr hdr = {
2938 .minorversion = clp->cl_mvops->minor_version,
2939 };
2940
2941 encode_compound_hdr(xdr, req, &hdr);
2942 encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
2943 encode_nops(&hdr);
2944}
2945
2946/*
2947 * a SEQUENCE request
2948 */
2949static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2950 const void *data)
2951{
2952 const struct nfs4_sequence_args *args = data;
2953 struct compound_hdr hdr = {
2954 .minorversion = nfs4_xdr_minorversion(args),
2955 };
2956
2957 encode_compound_hdr(xdr, req, &hdr);
2958 encode_sequence(xdr, args, &hdr);
2959 encode_nops(&hdr);
2960}
2961
2962#endif
2963
2964/*
2965 * a GET_LEASE_TIME request
2966 */
2967static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2968 struct xdr_stream *xdr,
2969 const void *data)
2970{
2971 const struct nfs4_get_lease_time_args *args = data;
2972 struct compound_hdr hdr = {
2973 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2974 };
2975 const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
2976
2977 encode_compound_hdr(xdr, req, &hdr);
2978 encode_sequence(xdr, &args->la_seq_args, &hdr);
2979 encode_putrootfh(xdr, &hdr);
2980 encode_fsinfo(xdr, lease_bitmap, &hdr);
2981 encode_nops(&hdr);
2982}
2983
2984#ifdef CONFIG_NFS_V4_1
2985
2986/*
2987 * a RECLAIM_COMPLETE request
2988 */
2989static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2990 struct xdr_stream *xdr,
2991 const void *data)
2992{
2993 const struct nfs41_reclaim_complete_args *args = data;
2994 struct compound_hdr hdr = {
2995 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2996 };
2997
2998 encode_compound_hdr(xdr, req, &hdr);
2999 encode_sequence(xdr, &args->seq_args, &hdr);
3000 encode_reclaim_complete(xdr, args, &hdr);
3001 encode_nops(&hdr);
3002}
3003
3004/*
3005 * Encode GETDEVICEINFO request
3006 */
3007static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
3008 struct xdr_stream *xdr,
3009 const void *data)
3010{
3011 const struct nfs4_getdeviceinfo_args *args = data;
3012 struct compound_hdr hdr = {
3013 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3014 };
3015
3016 encode_compound_hdr(xdr, req, &hdr);
3017 encode_sequence(xdr, &args->seq_args, &hdr);
3018 encode_getdeviceinfo(xdr, args, &hdr);
3019
3020 /* set up reply kvec. Subtract notification bitmap max size (2)
3021 * so that notification bitmap is put in xdr_buf tail */
3022 rpc_prepare_reply_pages(req, args->pdev->pages, args->pdev->pgbase,
3023 args->pdev->pglen, hdr.replen - 2);
3024 encode_nops(&hdr);
3025}
3026
3027/*
3028 * Encode LAYOUTGET request
3029 */
3030static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
3031 struct xdr_stream *xdr,
3032 const void *data)
3033{
3034 const struct nfs4_layoutget_args *args = data;
3035 struct compound_hdr hdr = {
3036 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3037 };
3038
3039 encode_compound_hdr(xdr, req, &hdr);
3040 encode_sequence(xdr, &args->seq_args, &hdr);
3041 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3042 encode_layoutget(xdr, args, &hdr);
3043
3044 rpc_prepare_reply_pages(req, args->layout.pages, 0,
3045 args->layout.pglen, hdr.replen);
3046 encode_nops(&hdr);
3047}
3048
3049/*
3050 * Encode LAYOUTCOMMIT request
3051 */
3052static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
3053 struct xdr_stream *xdr,
3054 const void *priv)
3055{
3056 const struct nfs4_layoutcommit_args *args = priv;
3057 struct nfs4_layoutcommit_data *data =
3058 container_of(args, struct nfs4_layoutcommit_data, args);
3059 struct compound_hdr hdr = {
3060 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3061 };
3062
3063 encode_compound_hdr(xdr, req, &hdr);
3064 encode_sequence(xdr, &args->seq_args, &hdr);
3065 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3066 encode_layoutcommit(xdr, data->args.inode, args, &hdr);
3067 encode_getfattr(xdr, args->bitmask, &hdr);
3068 encode_nops(&hdr);
3069}
3070
3071/*
3072 * Encode LAYOUTRETURN request
3073 */
3074static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
3075 struct xdr_stream *xdr,
3076 const void *data)
3077{
3078 const struct nfs4_layoutreturn_args *args = data;
3079 struct compound_hdr hdr = {
3080 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3081 };
3082
3083 encode_compound_hdr(xdr, req, &hdr);
3084 encode_sequence(xdr, &args->seq_args, &hdr);
3085 encode_putfh(xdr, NFS_FH(args->inode), &hdr);
3086 encode_layoutreturn(xdr, args, &hdr);
3087 encode_nops(&hdr);
3088}
3089
3090/*
3091 * Encode SECINFO_NO_NAME request
3092 */
3093static void nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
3094 struct xdr_stream *xdr,
3095 const void *data)
3096{
3097 const struct nfs41_secinfo_no_name_args *args = data;
3098 struct compound_hdr hdr = {
3099 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3100 };
3101
3102 encode_compound_hdr(xdr, req, &hdr);
3103 encode_sequence(xdr, &args->seq_args, &hdr);
3104 encode_putrootfh(xdr, &hdr);
3105 encode_secinfo_no_name(xdr, args, &hdr);
3106 encode_nops(&hdr);
3107}
3108
3109/*
3110 * Encode TEST_STATEID request
3111 */
3112static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
3113 struct xdr_stream *xdr,
3114 const void *data)
3115{
3116 const struct nfs41_test_stateid_args *args = data;
3117 struct compound_hdr hdr = {
3118 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3119 };
3120
3121 encode_compound_hdr(xdr, req, &hdr);
3122 encode_sequence(xdr, &args->seq_args, &hdr);
3123 encode_test_stateid(xdr, args, &hdr);
3124 encode_nops(&hdr);
3125}
3126
3127/*
3128 * Encode FREE_STATEID request
3129 */
3130static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
3131 struct xdr_stream *xdr,
3132 const void *data)
3133{
3134 const struct nfs41_free_stateid_args *args = data;
3135 struct compound_hdr hdr = {
3136 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
3137 };
3138
3139 encode_compound_hdr(xdr, req, &hdr);
3140 encode_sequence(xdr, &args->seq_args, &hdr);
3141 encode_free_stateid(xdr, args, &hdr);
3142 encode_nops(&hdr);
3143}
3144#endif /* CONFIG_NFS_V4_1 */
3145
3146static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
3147{
3148 ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
3149 NFS4_OPAQUE_LIMIT);
3150 if (unlikely(ret < 0))
3151 return -EIO;
3152 *len = ret;
3153 return 0;
3154}
3155
3156static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
3157{
3158 __be32 *p;
3159
3160 p = xdr_inline_decode(xdr, 8);
3161 if (unlikely(!p))
3162 return -EIO;
3163 hdr->status = be32_to_cpup(p++);
3164 hdr->taglen = be32_to_cpup(p);
3165
3166 p = xdr_inline_decode(xdr, hdr->taglen + 4);
3167 if (unlikely(!p))
3168 return -EIO;
3169 hdr->tag = (char *)p;
3170 p += XDR_QUADLEN(hdr->taglen);
3171 hdr->nops = be32_to_cpup(p);
3172 if (unlikely(hdr->nops < 1))
3173 return nfs4_stat_to_errno(hdr->status);
3174 return 0;
3175}
3176
3177static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
3178 int *nfs_retval)
3179{
3180 __be32 *p;
3181 uint32_t opnum;
3182 int32_t nfserr;
3183
3184 p = xdr_inline_decode(xdr, 8);
3185 if (unlikely(!p))
3186 goto out_overflow;
3187 opnum = be32_to_cpup(p++);
3188 if (unlikely(opnum != expected))
3189 goto out_bad_operation;
3190 if (unlikely(*p != cpu_to_be32(NFS_OK)))
3191 goto out_status;
3192 *nfs_retval = 0;
3193 return true;
3194out_status:
3195 nfserr = be32_to_cpup(p);
3196 trace_nfs4_xdr_status(xdr, opnum, nfserr);
3197 *nfs_retval = nfs4_stat_to_errno(nfserr);
3198 return true;
3199out_bad_operation:
3200 dprintk("nfs: Server returned operation"
3201 " %d but we issued a request for %d\n",
3202 opnum, expected);
3203 *nfs_retval = -EREMOTEIO;
3204 return false;
3205out_overflow:
3206 *nfs_retval = -EIO;
3207 return false;
3208}
3209
3210static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
3211{
3212 int retval;
3213
3214 __decode_op_hdr(xdr, expected, &retval);
3215 return retval;
3216}
3217
3218/* Dummy routine */
3219static int decode_ace(struct xdr_stream *xdr, void *ace)
3220{
3221 __be32 *p;
3222 unsigned int strlen;
3223 char *str;
3224
3225 p = xdr_inline_decode(xdr, 12);
3226 if (unlikely(!p))
3227 return -EIO;
3228 return decode_opaque_inline(xdr, &strlen, &str);
3229}
3230
3231static ssize_t
3232decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
3233{
3234 ssize_t ret;
3235
3236 ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
3237 if (likely(ret >= 0))
3238 return ret;
3239 if (ret != -EMSGSIZE)
3240 return -EIO;
3241 return sz;
3242}
3243
3244static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
3245{
3246 ssize_t ret;
3247 ret = decode_bitmap4(xdr, bitmap, 3);
3248 return ret < 0 ? ret : 0;
3249}
3250
3251static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
3252{
3253 __be32 *p;
3254
3255 p = xdr_inline_decode(xdr, 4);
3256 if (unlikely(!p))
3257 return -EIO;
3258 *attrlen = be32_to_cpup(p);
3259 *savep = xdr_stream_pos(xdr);
3260 return 0;
3261}
3262
3263static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
3264{
3265 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
3266 int ret;
3267 ret = decode_attr_bitmap(xdr, bitmask);
3268 if (unlikely(ret < 0))
3269 return ret;
3270 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
3271 } else
3272 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3273 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3274 bitmask[0], bitmask[1], bitmask[2]);
3275 return 0;
3276}
3277
3278static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
3279{
3280 __be32 *p;
3281 int ret = 0;
3282
3283 *type = 0;
3284 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
3285 return -EIO;
3286 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
3287 p = xdr_inline_decode(xdr, 4);
3288 if (unlikely(!p))
3289 return -EIO;
3290 *type = be32_to_cpup(p);
3291 if (*type < NF4REG || *type > NF4NAMEDATTR) {
3292 dprintk("%s: bad type %d\n", __func__, *type);
3293 return -EIO;
3294 }
3295 bitmap[0] &= ~FATTR4_WORD0_TYPE;
3296 ret = NFS_ATTR_FATTR_TYPE;
3297 }
3298 dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
3299 return ret;
3300}
3301
3302static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
3303 uint32_t *bitmap, uint32_t *type)
3304{
3305 __be32 *p;
3306
3307 *type = 0;
3308 if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
3309 return -EIO;
3310 if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
3311 p = xdr_inline_decode(xdr, 4);
3312 if (unlikely(!p))
3313 return -EIO;
3314 *type = be32_to_cpup(p);
3315 bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
3316 }
3317 dprintk("%s: expire type=0x%x\n", __func__, *type);
3318 return 0;
3319}
3320
3321static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
3322{
3323 __be32 *p;
3324 int ret = 0;
3325
3326 *change = 0;
3327 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
3328 return -EIO;
3329 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
3330 p = xdr_inline_decode(xdr, 8);
3331 if (unlikely(!p))
3332 return -EIO;
3333 xdr_decode_hyper(p, change);
3334 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
3335 ret = NFS_ATTR_FATTR_CHANGE;
3336 }
3337 dprintk("%s: change attribute=%Lu\n", __func__,
3338 (unsigned long long)*change);
3339 return ret;
3340}
3341
3342static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
3343{
3344 __be32 *p;
3345 int ret = 0;
3346
3347 *size = 0;
3348 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
3349 return -EIO;
3350 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
3351 p = xdr_inline_decode(xdr, 8);
3352 if (unlikely(!p))
3353 return -EIO;
3354 xdr_decode_hyper(p, size);
3355 bitmap[0] &= ~FATTR4_WORD0_SIZE;
3356 ret = NFS_ATTR_FATTR_SIZE;
3357 }
3358 dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
3359 return ret;
3360}
3361
3362static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3363{
3364 __be32 *p;
3365
3366 *res = 0;
3367 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
3368 return -EIO;
3369 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
3370 p = xdr_inline_decode(xdr, 4);
3371 if (unlikely(!p))
3372 return -EIO;
3373 *res = be32_to_cpup(p);
3374 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
3375 }
3376 dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
3377 return 0;
3378}
3379
3380static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3381{
3382 __be32 *p;
3383
3384 *res = 0;
3385 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
3386 return -EIO;
3387 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
3388 p = xdr_inline_decode(xdr, 4);
3389 if (unlikely(!p))
3390 return -EIO;
3391 *res = be32_to_cpup(p);
3392 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
3393 }
3394 dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
3395 return 0;
3396}
3397
3398static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
3399{
3400 __be32 *p;
3401 int ret = 0;
3402
3403 fsid->major = 0;
3404 fsid->minor = 0;
3405 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
3406 return -EIO;
3407 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
3408 p = xdr_inline_decode(xdr, 16);
3409 if (unlikely(!p))
3410 return -EIO;
3411 p = xdr_decode_hyper(p, &fsid->major);
3412 xdr_decode_hyper(p, &fsid->minor);
3413 bitmap[0] &= ~FATTR4_WORD0_FSID;
3414 ret = NFS_ATTR_FATTR_FSID;
3415 }
3416 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3417 (unsigned long long)fsid->major,
3418 (unsigned long long)fsid->minor);
3419 return ret;
3420}
3421
3422static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3423{
3424 __be32 *p;
3425
3426 *res = 60;
3427 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3428 return -EIO;
3429 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3430 p = xdr_inline_decode(xdr, 4);
3431 if (unlikely(!p))
3432 return -EIO;
3433 *res = be32_to_cpup(p);
3434 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3435 }
3436 dprintk("%s: lease time=%u\n", __func__, (unsigned int)*res);
3437 return 0;
3438}
3439
3440static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
3441{
3442 __be32 *p;
3443
3444 if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3445 return -EIO;
3446 if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3447 p = xdr_inline_decode(xdr, 4);
3448 if (unlikely(!p))
3449 return -EIO;
3450 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3451 *res = -be32_to_cpup(p);
3452 }
3453 return 0;
3454}
3455
3456static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
3457 uint32_t *bitmap, uint32_t *bitmask)
3458{
3459 if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
3460 int ret;
3461 ret = decode_attr_bitmap(xdr, bitmask);
3462 if (unlikely(ret < 0))
3463 return ret;
3464 bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3465 } else
3466 bitmask[0] = bitmask[1] = bitmask[2] = 0;
3467 dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
3468 bitmask[0], bitmask[1], bitmask[2]);
3469 return 0;
3470}
3471
3472static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3473{
3474 __be32 *p;
3475 u32 len;
3476
3477 if (fh != NULL)
3478 memset(fh, 0, sizeof(*fh));
3479
3480 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3481 return -EIO;
3482 if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3483 p = xdr_inline_decode(xdr, 4);
3484 if (unlikely(!p))
3485 return -EIO;
3486 len = be32_to_cpup(p);
3487 if (len > NFS4_FHSIZE)
3488 return -EIO;
3489 p = xdr_inline_decode(xdr, len);
3490 if (unlikely(!p))
3491 return -EIO;
3492 if (fh != NULL) {
3493 memcpy(fh->data, p, len);
3494 fh->size = len;
3495 }
3496 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3497 }
3498 return 0;
3499}
3500
3501static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3502{
3503 __be32 *p;
3504
3505 *res = 0;
3506 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3507 return -EIO;
3508 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3509 p = xdr_inline_decode(xdr, 4);
3510 if (unlikely(!p))
3511 return -EIO;
3512 *res = be32_to_cpup(p);
3513 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3514 }
3515 dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3516 return 0;
3517}
3518
3519static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3520{
3521 __be32 *p;
3522 int ret = 0;
3523
3524 *fileid = 0;
3525 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3526 return -EIO;
3527 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3528 p = xdr_inline_decode(xdr, 8);
3529 if (unlikely(!p))
3530 return -EIO;
3531 xdr_decode_hyper(p, fileid);
3532 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3533 ret = NFS_ATTR_FATTR_FILEID;
3534 }
3535 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3536 return ret;
3537}
3538
3539static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3540{
3541 __be32 *p;
3542 int ret = 0;
3543
3544 *fileid = 0;
3545 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3546 return -EIO;
3547 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3548 p = xdr_inline_decode(xdr, 8);
3549 if (unlikely(!p))
3550 return -EIO;
3551 xdr_decode_hyper(p, fileid);
3552 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3553 ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
3554 }
3555 dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3556 return ret;
3557}
3558
3559static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3560{
3561 __be32 *p;
3562 int status = 0;
3563
3564 *res = 0;
3565 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3566 return -EIO;
3567 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3568 p = xdr_inline_decode(xdr, 8);
3569 if (unlikely(!p))
3570 return -EIO;
3571 xdr_decode_hyper(p, res);
3572 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3573 }
3574 dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3575 return status;
3576}
3577
3578static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3579{
3580 __be32 *p;
3581 int status = 0;
3582
3583 *res = 0;
3584 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3585 return -EIO;
3586 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3587 p = xdr_inline_decode(xdr, 8);
3588 if (unlikely(!p))
3589 return -EIO;
3590 xdr_decode_hyper(p, res);
3591 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3592 }
3593 dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3594 return status;
3595}
3596
3597static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3598{
3599 __be32 *p;
3600 int status = 0;
3601
3602 *res = 0;
3603 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3604 return -EIO;
3605 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3606 p = xdr_inline_decode(xdr, 8);
3607 if (unlikely(!p))
3608 return -EIO;
3609 xdr_decode_hyper(p, res);
3610 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3611 }
3612 dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3613 return status;
3614}
3615
3616static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3617{
3618 u32 n;
3619 __be32 *p;
3620 int status = 0;
3621
3622 p = xdr_inline_decode(xdr, 4);
3623 if (unlikely(!p))
3624 return -EIO;
3625 n = be32_to_cpup(p);
3626 if (n == 0)
3627 goto root_path;
3628 dprintk("pathname4: ");
3629 if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
3630 dprintk("cannot parse %d components in path\n", n);
3631 goto out_eio;
3632 }
3633 for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
3634 struct nfs4_string *component = &path->components[path->ncomponents];
3635 status = decode_opaque_inline(xdr, &component->len, &component->data);
3636 if (unlikely(status != 0))
3637 goto out_eio;
3638 ifdebug (XDR)
3639 pr_cont("%s%.*s ",
3640 (path->ncomponents != n ? "/ " : ""),
3641 component->len, component->data);
3642 }
3643out:
3644 return status;
3645root_path:
3646/* a root pathname is sent as a zero component4 */
3647 path->ncomponents = 1;
3648 path->components[0].len=0;
3649 path->components[0].data=NULL;
3650 dprintk("pathname4: /\n");
3651 goto out;
3652out_eio:
3653 dprintk(" status %d", status);
3654 status = -EIO;
3655 goto out;
3656}
3657
3658static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3659{
3660 int n;
3661 __be32 *p;
3662 int status = -EIO;
3663
3664 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3665 goto out;
3666 status = 0;
3667 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3668 goto out;
3669 bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
3670 status = -EIO;
3671 /* Ignore borken servers that return unrequested attrs */
3672 if (unlikely(res == NULL))
3673 goto out;
3674 dprintk("%s: fsroot:\n", __func__);
3675 status = decode_pathname(xdr, &res->fs_path);
3676 if (unlikely(status != 0))
3677 goto out;
3678 p = xdr_inline_decode(xdr, 4);
3679 if (unlikely(!p))
3680 goto out_eio;
3681 n = be32_to_cpup(p);
3682 if (n <= 0)
3683 goto out_eio;
3684 for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
3685 u32 m;
3686 struct nfs4_fs_location *loc;
3687
3688 if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
3689 break;
3690 loc = &res->locations[res->nlocations];
3691 p = xdr_inline_decode(xdr, 4);
3692 if (unlikely(!p))
3693 goto out_eio;
3694 m = be32_to_cpup(p);
3695
3696 dprintk("%s: servers:\n", __func__);
3697 for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
3698 struct nfs4_string *server;
3699
3700 if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
3701 unsigned int i;
3702 dprintk("%s: using first %u of %u servers "
3703 "returned for location %u\n",
3704 __func__,
3705 NFS4_FS_LOCATION_MAXSERVERS,
3706 m, res->nlocations);
3707 for (i = loc->nservers; i < m; i++) {
3708 unsigned int len;
3709 char *data;
3710 status = decode_opaque_inline(xdr, &len, &data);
3711 if (unlikely(status != 0))
3712 goto out_eio;
3713 }
3714 break;
3715 }
3716 server = &loc->servers[loc->nservers];
3717 status = decode_opaque_inline(xdr, &server->len, &server->data);
3718 if (unlikely(status != 0))
3719 goto out_eio;
3720 dprintk("%s ", server->data);
3721 }
3722 status = decode_pathname(xdr, &loc->rootpath);
3723 if (unlikely(status != 0))
3724 goto out_eio;
3725 }
3726 if (res->nlocations != 0)
3727 status = NFS_ATTR_FATTR_V4_LOCATIONS;
3728out:
3729 dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3730 return status;
3731out_eio:
3732 status = -EIO;
3733 goto out;
3734}
3735
3736static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3737{
3738 __be32 *p;
3739 int status = 0;
3740
3741 *res = 0;
3742 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3743 return -EIO;
3744 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3745 p = xdr_inline_decode(xdr, 8);
3746 if (unlikely(!p))
3747 return -EIO;
3748 xdr_decode_hyper(p, res);
3749 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3750 }
3751 dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3752 return status;
3753}
3754
3755static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3756{
3757 __be32 *p;
3758 int status = 0;
3759
3760 *maxlink = 1;
3761 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3762 return -EIO;
3763 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3764 p = xdr_inline_decode(xdr, 4);
3765 if (unlikely(!p))
3766 return -EIO;
3767 *maxlink = be32_to_cpup(p);
3768 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3769 }
3770 dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3771 return status;
3772}
3773
3774static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3775{
3776 __be32 *p;
3777 int status = 0;
3778
3779 *maxname = 1024;
3780 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3781 return -EIO;
3782 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3783 p = xdr_inline_decode(xdr, 4);
3784 if (unlikely(!p))
3785 return -EIO;
3786 *maxname = be32_to_cpup(p);
3787 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3788 }
3789 dprintk("%s: maxname=%u\n", __func__, *maxname);
3790 return status;
3791}
3792
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 return -EIO;
3806 xdr_decode_hyper(p, &maxread);
3807 if (maxread > 0x7FFFFFFF)
3808 maxread = 0x7FFFFFFF;
3809 *res = (uint32_t)maxread;
3810 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3811 }
3812 dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3813 return status;
3814}
3815
3816static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3817{
3818 __be32 *p;
3819 int status = 0;
3820
3821 *res = 1024;
3822 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3823 return -EIO;
3824 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3825 uint64_t maxwrite;
3826 p = xdr_inline_decode(xdr, 8);
3827 if (unlikely(!p))
3828 return -EIO;
3829 xdr_decode_hyper(p, &maxwrite);
3830 if (maxwrite > 0x7FFFFFFF)
3831 maxwrite = 0x7FFFFFFF;
3832 *res = (uint32_t)maxwrite;
3833 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3834 }
3835 dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3836 return status;
3837}
3838
3839static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3840{
3841 uint32_t tmp;
3842 __be32 *p;
3843 int ret = 0;
3844
3845 *mode = 0;
3846 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3847 return -EIO;
3848 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3849 p = xdr_inline_decode(xdr, 4);
3850 if (unlikely(!p))
3851 return -EIO;
3852 tmp = be32_to_cpup(p);
3853 *mode = tmp & ~S_IFMT;
3854 bitmap[1] &= ~FATTR4_WORD1_MODE;
3855 ret = NFS_ATTR_FATTR_MODE;
3856 }
3857 dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3858 return ret;
3859}
3860
3861static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3862{
3863 __be32 *p;
3864 int ret = 0;
3865
3866 *nlink = 1;
3867 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3868 return -EIO;
3869 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3870 p = xdr_inline_decode(xdr, 4);
3871 if (unlikely(!p))
3872 return -EIO;
3873 *nlink = be32_to_cpup(p);
3874 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3875 ret = NFS_ATTR_FATTR_NLINK;
3876 }
3877 dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3878 return ret;
3879}
3880
3881static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
3882 struct nfs4_string *name, gfp_t gfp_flags)
3883{
3884 ssize_t ret;
3885
3886 ret = xdr_stream_decode_string_dup(xdr, &name->data,
3887 XDR_MAX_NETOBJ, gfp_flags);
3888 name->len = 0;
3889 if (ret > 0)
3890 name->len = ret;
3891 return ret;
3892}
3893
3894static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3895 const struct nfs_server *server, kuid_t *uid,
3896 struct nfs4_string *owner_name)
3897{
3898 ssize_t len;
3899 char *p;
3900
3901 *uid = make_kuid(&init_user_ns, -2);
3902 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3903 return -EIO;
3904 if (!(bitmap[1] & FATTR4_WORD1_OWNER))
3905 return 0;
3906 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3907
3908 if (owner_name != NULL) {
3909 len = decode_nfs4_string(xdr, owner_name, GFP_NOIO);
3910 if (len <= 0)
3911 goto out;
3912 dprintk("%s: name=%s\n", __func__, owner_name->data);
3913 return NFS_ATTR_FATTR_OWNER_NAME;
3914 } else {
3915 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3916 XDR_MAX_NETOBJ);
3917 if (len <= 0 || nfs_map_name_to_uid(server, p, len, uid) != 0)
3918 goto out;
3919 dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
3920 return NFS_ATTR_FATTR_OWNER;
3921 }
3922out:
3923 if (len == -EBADMSG)
3924 return -EIO;
3925 return 0;
3926}
3927
3928static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3929 const struct nfs_server *server, kgid_t *gid,
3930 struct nfs4_string *group_name)
3931{
3932 ssize_t len;
3933 char *p;
3934
3935 *gid = make_kgid(&init_user_ns, -2);
3936 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3937 return -EIO;
3938 if (!(bitmap[1] & FATTR4_WORD1_OWNER_GROUP))
3939 return 0;
3940 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3941
3942 if (group_name != NULL) {
3943 len = decode_nfs4_string(xdr, group_name, GFP_NOIO);
3944 if (len <= 0)
3945 goto out;
3946 dprintk("%s: name=%s\n", __func__, group_name->data);
3947 return NFS_ATTR_FATTR_GROUP_NAME;
3948 } else {
3949 len = xdr_stream_decode_opaque_inline(xdr, (void **)&p,
3950 XDR_MAX_NETOBJ);
3951 if (len <= 0 || nfs_map_group_to_gid(server, p, len, gid) != 0)
3952 goto out;
3953 dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
3954 return NFS_ATTR_FATTR_GROUP;
3955 }
3956out:
3957 if (len == -EBADMSG)
3958 return -EIO;
3959 return 0;
3960}
3961
3962static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3963{
3964 uint32_t major = 0, minor = 0;
3965 __be32 *p;
3966 int ret = 0;
3967
3968 *rdev = MKDEV(0,0);
3969 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3970 return -EIO;
3971 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3972 dev_t tmp;
3973
3974 p = xdr_inline_decode(xdr, 8);
3975 if (unlikely(!p))
3976 return -EIO;
3977 major = be32_to_cpup(p++);
3978 minor = be32_to_cpup(p);
3979 tmp = MKDEV(major, minor);
3980 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3981 *rdev = tmp;
3982 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3983 ret = NFS_ATTR_FATTR_RDEV;
3984 }
3985 dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3986 return ret;
3987}
3988
3989static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3990{
3991 __be32 *p;
3992 int status = 0;
3993
3994 *res = 0;
3995 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3996 return -EIO;
3997 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3998 p = xdr_inline_decode(xdr, 8);
3999 if (unlikely(!p))
4000 return -EIO;
4001 xdr_decode_hyper(p, res);
4002 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
4003 }
4004 dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
4005 return status;
4006}
4007
4008static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4009{
4010 __be32 *p;
4011 int status = 0;
4012
4013 *res = 0;
4014 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
4015 return -EIO;
4016 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
4017 p = xdr_inline_decode(xdr, 8);
4018 if (unlikely(!p))
4019 return -EIO;
4020 xdr_decode_hyper(p, res);
4021 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
4022 }
4023 dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
4024 return status;
4025}
4026
4027static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
4028{
4029 __be32 *p;
4030 int status = 0;
4031
4032 *res = 0;
4033 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
4034 return -EIO;
4035 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
4036 p = xdr_inline_decode(xdr, 8);
4037 if (unlikely(!p))
4038 return -EIO;
4039 xdr_decode_hyper(p, res);
4040 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
4041 }
4042 dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
4043 return status;
4044}
4045
4046static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
4047{
4048 __be32 *p;
4049 int ret = 0;
4050
4051 *used = 0;
4052 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
4053 return -EIO;
4054 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
4055 p = xdr_inline_decode(xdr, 8);
4056 if (unlikely(!p))
4057 return -EIO;
4058 xdr_decode_hyper(p, used);
4059 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
4060 ret = NFS_ATTR_FATTR_SPACE_USED;
4061 }
4062 dprintk("%s: space used=%Lu\n", __func__,
4063 (unsigned long long)*used);
4064 return ret;
4065}
4066
4067static __be32 *
4068xdr_decode_nfstime4(__be32 *p, struct timespec *t)
4069{
4070 __u64 sec;
4071
4072 p = xdr_decode_hyper(p, &sec);
4073 t-> tv_sec = (time_t)sec;
4074 t->tv_nsec = be32_to_cpup(p++);
4075 return p;
4076}
4077
4078static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
4079{
4080 __be32 *p;
4081
4082 p = xdr_inline_decode(xdr, nfstime4_maxsz << 2);
4083 if (unlikely(!p))
4084 return -EIO;
4085 xdr_decode_nfstime4(p, time);
4086 return 0;
4087}
4088
4089static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4090{
4091 int status = 0;
4092
4093 time->tv_sec = 0;
4094 time->tv_nsec = 0;
4095 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
4096 return -EIO;
4097 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
4098 status = decode_attr_time(xdr, time);
4099 if (status == 0)
4100 status = NFS_ATTR_FATTR_ATIME;
4101 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
4102 }
4103 dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
4104 return status;
4105}
4106
4107static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4108{
4109 int status = 0;
4110
4111 time->tv_sec = 0;
4112 time->tv_nsec = 0;
4113 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
4114 return -EIO;
4115 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
4116 status = decode_attr_time(xdr, time);
4117 if (status == 0)
4118 status = NFS_ATTR_FATTR_CTIME;
4119 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
4120 }
4121 dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
4122 return status;
4123}
4124
4125static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
4126 struct timespec *time)
4127{
4128 int status = 0;
4129
4130 time->tv_sec = 0;
4131 time->tv_nsec = 0;
4132 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
4133 return -EIO;
4134 if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
4135 status = decode_attr_time(xdr, time);
4136 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
4137 }
4138 dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
4139 (long)time->tv_nsec);
4140 return status;
4141}
4142
4143static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
4144 struct nfs4_label *label)
4145{
4146 uint32_t pi = 0;
4147 uint32_t lfs = 0;
4148 __u32 len;
4149 __be32 *p;
4150 int status = 0;
4151
4152 if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
4153 return -EIO;
4154 if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
4155 p = xdr_inline_decode(xdr, 4);
4156 if (unlikely(!p))
4157 return -EIO;
4158 lfs = be32_to_cpup(p++);
4159 p = xdr_inline_decode(xdr, 4);
4160 if (unlikely(!p))
4161 return -EIO;
4162 pi = be32_to_cpup(p++);
4163 p = xdr_inline_decode(xdr, 4);
4164 if (unlikely(!p))
4165 return -EIO;
4166 len = be32_to_cpup(p++);
4167 p = xdr_inline_decode(xdr, len);
4168 if (unlikely(!p))
4169 return -EIO;
4170 if (len < NFS4_MAXLABELLEN) {
4171 if (label) {
4172 memcpy(label->label, p, len);
4173 label->len = len;
4174 label->pi = pi;
4175 label->lfs = lfs;
4176 status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
4177 }
4178 bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
4179 } else
4180 printk(KERN_WARNING "%s: label too long (%u)!\n",
4181 __func__, len);
4182 }
4183 if (label && label->label)
4184 dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
4185 (char *)label->label, label->len, label->pi, label->lfs);
4186 return status;
4187}
4188
4189static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
4190{
4191 int status = 0;
4192
4193 time->tv_sec = 0;
4194 time->tv_nsec = 0;
4195 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
4196 return -EIO;
4197 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
4198 status = decode_attr_time(xdr, time);
4199 if (status == 0)
4200 status = NFS_ATTR_FATTR_MTIME;
4201 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
4202 }
4203 dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
4204 return status;
4205}
4206
4207static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
4208{
4209 unsigned int attrwords = XDR_QUADLEN(attrlen);
4210 unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
4211
4212 if (unlikely(attrwords != nwords)) {
4213 dprintk("%s: server returned incorrect attribute length: "
4214 "%u %c %u\n",
4215 __func__,
4216 attrwords << 2,
4217 (attrwords < nwords) ? '<' : '>',
4218 nwords << 2);
4219 return -EIO;
4220 }
4221 return 0;
4222}
4223
4224static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4225{
4226 __be32 *p;
4227
4228 p = xdr_inline_decode(xdr, 20);
4229 if (unlikely(!p))
4230 return -EIO;
4231 cinfo->atomic = be32_to_cpup(p++);
4232 p = xdr_decode_hyper(p, &cinfo->before);
4233 xdr_decode_hyper(p, &cinfo->after);
4234 return 0;
4235}
4236
4237static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
4238{
4239 __be32 *p;
4240 uint32_t supp, acc;
4241 int status;
4242
4243 status = decode_op_hdr(xdr, OP_ACCESS);
4244 if (status)
4245 return status;
4246 p = xdr_inline_decode(xdr, 8);
4247 if (unlikely(!p))
4248 return -EIO;
4249 supp = be32_to_cpup(p++);
4250 acc = be32_to_cpup(p);
4251 *supported = supp;
4252 *access = acc;
4253 return 0;
4254}
4255
4256static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
4257{
4258 ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
4259 if (unlikely(ret < 0))
4260 return -EIO;
4261 return 0;
4262}
4263
4264static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4265{
4266 return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
4267}
4268
4269static int decode_open_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4270{
4271 stateid->type = NFS4_OPEN_STATEID_TYPE;
4272 return decode_stateid(xdr, stateid);
4273}
4274
4275static int decode_lock_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4276{
4277 stateid->type = NFS4_LOCK_STATEID_TYPE;
4278 return decode_stateid(xdr, stateid);
4279}
4280
4281static int decode_delegation_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4282{
4283 stateid->type = NFS4_DELEGATION_STATEID_TYPE;
4284 return decode_stateid(xdr, stateid);
4285}
4286
4287static int decode_invalid_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
4288{
4289 nfs4_stateid dummy;
4290
4291 nfs4_stateid_copy(stateid, &invalid_stateid);
4292 return decode_stateid(xdr, &dummy);
4293}
4294
4295static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
4296{
4297 int status;
4298
4299 status = decode_op_hdr(xdr, OP_CLOSE);
4300 if (status != -EIO)
4301 nfs_increment_open_seqid(status, res->seqid);
4302 if (!status)
4303 status = decode_invalid_stateid(xdr, &res->stateid);
4304 return status;
4305}
4306
4307static int decode_verifier(struct xdr_stream *xdr, void *verifier)
4308{
4309 return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
4310}
4311
4312static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
4313{
4314 return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
4315}
4316
4317static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
4318{
4319 int status;
4320
4321 status = decode_op_hdr(xdr, OP_COMMIT);
4322 if (!status)
4323 status = decode_write_verifier(xdr, &res->verf->verifier);
4324 return status;
4325}
4326
4327static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4328{
4329 __be32 *p;
4330 uint32_t bmlen;
4331 int status;
4332
4333 status = decode_op_hdr(xdr, OP_CREATE);
4334 if (status)
4335 return status;
4336 if ((status = decode_change_info(xdr, cinfo)))
4337 return status;
4338 p = xdr_inline_decode(xdr, 4);
4339 if (unlikely(!p))
4340 return -EIO;
4341 bmlen = be32_to_cpup(p);
4342 p = xdr_inline_decode(xdr, bmlen << 2);
4343 if (likely(p))
4344 return 0;
4345 return -EIO;
4346}
4347
4348static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
4349{
4350 unsigned int savep;
4351 uint32_t attrlen, bitmap[3] = {0};
4352 int status;
4353
4354 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4355 goto xdr_error;
4356 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4357 goto xdr_error;
4358 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4359 goto xdr_error;
4360 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
4361 goto xdr_error;
4362 if ((status = decode_attr_fh_expire_type(xdr, bitmap,
4363 &res->fh_expire_type)) != 0)
4364 goto xdr_error;
4365 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
4366 goto xdr_error;
4367 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
4368 goto xdr_error;
4369 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
4370 goto xdr_error;
4371 if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
4372 res->exclcreat_bitmask)) != 0)
4373 goto xdr_error;
4374 status = verify_attr_len(xdr, savep, attrlen);
4375xdr_error:
4376 dprintk("%s: xdr returned %d!\n", __func__, -status);
4377 return status;
4378}
4379
4380static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
4381{
4382 unsigned int savep;
4383 uint32_t attrlen, bitmap[3] = {0};
4384 int status;
4385
4386 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4387 goto xdr_error;
4388 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4389 goto xdr_error;
4390 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4391 goto xdr_error;
4392
4393 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
4394 goto xdr_error;
4395 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
4396 goto xdr_error;
4397 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
4398 goto xdr_error;
4399
4400 status = -EIO;
4401 if (unlikely(bitmap[0]))
4402 goto xdr_error;
4403
4404 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
4405 goto xdr_error;
4406 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
4407 goto xdr_error;
4408 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
4409 goto xdr_error;
4410
4411 status = verify_attr_len(xdr, savep, attrlen);
4412xdr_error:
4413 dprintk("%s: xdr returned %d!\n", __func__, -status);
4414 return status;
4415}
4416
4417static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
4418{
4419 unsigned int savep;
4420 uint32_t attrlen, bitmap[3] = {0};
4421 int status;
4422
4423 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4424 goto xdr_error;
4425 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4426 goto xdr_error;
4427 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4428 goto xdr_error;
4429
4430 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
4431 goto xdr_error;
4432 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
4433 goto xdr_error;
4434
4435 status = verify_attr_len(xdr, savep, attrlen);
4436xdr_error:
4437 dprintk("%s: xdr returned %d!\n", __func__, -status);
4438 return status;
4439}
4440
4441static int decode_threshold_hint(struct xdr_stream *xdr,
4442 uint32_t *bitmap,
4443 uint64_t *res,
4444 uint32_t hint_bit)
4445{
4446 __be32 *p;
4447
4448 *res = 0;
4449 if (likely(bitmap[0] & hint_bit)) {
4450 p = xdr_inline_decode(xdr, 8);
4451 if (unlikely(!p))
4452 return -EIO;
4453 xdr_decode_hyper(p, res);
4454 }
4455 return 0;
4456}
4457
4458static int decode_first_threshold_item4(struct xdr_stream *xdr,
4459 struct nfs4_threshold *res)
4460{
4461 __be32 *p;
4462 unsigned int savep;
4463 uint32_t bitmap[3] = {0,}, attrlen;
4464 int status;
4465
4466 /* layout type */
4467 p = xdr_inline_decode(xdr, 4);
4468 if (unlikely(!p))
4469 return -EIO;
4470 res->l_type = be32_to_cpup(p);
4471
4472 /* thi_hintset bitmap */
4473 status = decode_attr_bitmap(xdr, bitmap);
4474 if (status < 0)
4475 goto xdr_error;
4476
4477 /* thi_hintlist length */
4478 status = decode_attr_length(xdr, &attrlen, &savep);
4479 if (status < 0)
4480 goto xdr_error;
4481 /* thi_hintlist */
4482 status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
4483 if (status < 0)
4484 goto xdr_error;
4485 status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
4486 if (status < 0)
4487 goto xdr_error;
4488 status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
4489 THRESHOLD_RD_IO);
4490 if (status < 0)
4491 goto xdr_error;
4492 status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
4493 THRESHOLD_WR_IO);
4494 if (status < 0)
4495 goto xdr_error;
4496
4497 status = verify_attr_len(xdr, savep, attrlen);
4498 res->bm = bitmap[0];
4499
4500 dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
4501 __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
4502 res->wr_io_sz);
4503xdr_error:
4504 dprintk("%s ret=%d!\n", __func__, status);
4505 return status;
4506}
4507
4508/*
4509 * Thresholds on pNFS direct I/O vrs MDS I/O
4510 */
4511static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
4512 uint32_t *bitmap,
4513 struct nfs4_threshold *res)
4514{
4515 __be32 *p;
4516 int status = 0;
4517 uint32_t num;
4518
4519 if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
4520 return -EIO;
4521 if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
4522 /* Did the server return an unrequested attribute? */
4523 if (unlikely(res == NULL))
4524 return -EREMOTEIO;
4525 p = xdr_inline_decode(xdr, 4);
4526 if (unlikely(!p))
4527 return -EIO;
4528 num = be32_to_cpup(p);
4529 if (num == 0)
4530 return 0;
4531 if (num > 1)
4532 printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
4533 "drivers per filesystem not supported\n",
4534 __func__);
4535
4536 status = decode_first_threshold_item4(xdr, res);
4537 bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
4538 }
4539 return status;
4540}
4541
4542static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4543 struct nfs_fattr *fattr, struct nfs_fh *fh,
4544 struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
4545 const struct nfs_server *server)
4546{
4547 int status;
4548 umode_t fmode = 0;
4549 uint32_t type;
4550 int32_t err;
4551
4552 status = decode_attr_type(xdr, bitmap, &type);
4553 if (status < 0)
4554 goto xdr_error;
4555 fattr->mode = 0;
4556 if (status != 0) {
4557 fattr->mode |= nfs_type2fmt[type];
4558 fattr->valid |= status;
4559 }
4560
4561 status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4562 if (status < 0)
4563 goto xdr_error;
4564 fattr->valid |= status;
4565
4566 status = decode_attr_size(xdr, bitmap, &fattr->size);
4567 if (status < 0)
4568 goto xdr_error;
4569 fattr->valid |= status;
4570
4571 status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4572 if (status < 0)
4573 goto xdr_error;
4574 fattr->valid |= status;
4575
4576 err = 0;
4577 status = decode_attr_error(xdr, bitmap, &err);
4578 if (status < 0)
4579 goto xdr_error;
4580
4581 status = decode_attr_filehandle(xdr, bitmap, fh);
4582 if (status < 0)
4583 goto xdr_error;
4584
4585 status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4586 if (status < 0)
4587 goto xdr_error;
4588 fattr->valid |= status;
4589
4590 status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
4591 if (status < 0)
4592 goto xdr_error;
4593 fattr->valid |= status;
4594
4595 status = -EIO;
4596 if (unlikely(bitmap[0]))
4597 goto xdr_error;
4598
4599 status = decode_attr_mode(xdr, bitmap, &fmode);
4600 if (status < 0)
4601 goto xdr_error;
4602 if (status != 0) {
4603 fattr->mode |= fmode;
4604 fattr->valid |= status;
4605 }
4606
4607 status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4608 if (status < 0)
4609 goto xdr_error;
4610 fattr->valid |= status;
4611
4612 status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
4613 if (status < 0)
4614 goto xdr_error;
4615 fattr->valid |= status;
4616
4617 status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
4618 if (status < 0)
4619 goto xdr_error;
4620 fattr->valid |= status;
4621
4622 status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4623 if (status < 0)
4624 goto xdr_error;
4625 fattr->valid |= status;
4626
4627 status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4628 if (status < 0)
4629 goto xdr_error;
4630 fattr->valid |= status;
4631
4632 status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4633 if (status < 0)
4634 goto xdr_error;
4635 fattr->valid |= status;
4636
4637 status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4638 if (status < 0)
4639 goto xdr_error;
4640 fattr->valid |= status;
4641
4642 status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4643 if (status < 0)
4644 goto xdr_error;
4645 fattr->valid |= status;
4646
4647 status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
4648 if (status < 0)
4649 goto xdr_error;
4650 fattr->valid |= status;
4651
4652 status = -EIO;
4653 if (unlikely(bitmap[1]))
4654 goto xdr_error;
4655
4656 status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
4657 if (status < 0)
4658 goto xdr_error;
4659
4660 if (label) {
4661 status = decode_attr_security_label(xdr, bitmap, label);
4662 if (status < 0)
4663 goto xdr_error;
4664 fattr->valid |= status;
4665 }
4666
4667xdr_error:
4668 dprintk("%s: xdr returned %d\n", __func__, -status);
4669 return status;
4670}
4671
4672static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4673 struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
4674 struct nfs4_label *label, const struct nfs_server *server)
4675{
4676 unsigned int savep;
4677 uint32_t attrlen,
4678 bitmap[3] = {0};
4679 int status;
4680
4681 status = decode_op_hdr(xdr, OP_GETATTR);
4682 if (status < 0)
4683 goto xdr_error;
4684
4685 status = decode_attr_bitmap(xdr, bitmap);
4686 if (status < 0)
4687 goto xdr_error;
4688
4689 status = decode_attr_length(xdr, &attrlen, &savep);
4690 if (status < 0)
4691 goto xdr_error;
4692
4693 status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
4694 label, server);
4695 if (status < 0)
4696 goto xdr_error;
4697
4698 status = verify_attr_len(xdr, savep, attrlen);
4699xdr_error:
4700 dprintk("%s: xdr returned %d\n", __func__, -status);
4701 return status;
4702}
4703
4704static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4705 struct nfs4_label *label, const struct nfs_server *server)
4706{
4707 return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
4708}
4709
4710static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4711 const struct nfs_server *server)
4712{
4713 return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
4714}
4715
4716/*
4717 * Decode potentially multiple layout types.
4718 */
4719static int decode_pnfs_layout_types(struct xdr_stream *xdr,
4720 struct nfs_fsinfo *fsinfo)
4721{
4722 __be32 *p;
4723 uint32_t i;
4724
4725 p = xdr_inline_decode(xdr, 4);
4726 if (unlikely(!p))
4727 return -EIO;
4728 fsinfo->nlayouttypes = be32_to_cpup(p);
4729
4730 /* pNFS is not supported by the underlying file system */
4731 if (fsinfo->nlayouttypes == 0)
4732 return 0;
4733
4734 /* Decode and set first layout type, move xdr->p past unused types */
4735 p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
4736 if (unlikely(!p))
4737 return -EIO;
4738
4739 /* If we get too many, then just cap it at the max */
4740 if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
4741 printk(KERN_INFO "NFS: %s: Warning: Too many (%u) pNFS layout types\n",
4742 __func__, fsinfo->nlayouttypes);
4743 fsinfo->nlayouttypes = NFS_MAX_LAYOUT_TYPES;
4744 }
4745
4746 for(i = 0; i < fsinfo->nlayouttypes; ++i)
4747 fsinfo->layouttype[i] = be32_to_cpup(p++);
4748 return 0;
4749}
4750
4751/*
4752 * The type of file system exported.
4753 * Note we must ensure that layouttype is set in any non-error case.
4754 */
4755static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4756 struct nfs_fsinfo *fsinfo)
4757{
4758 int status = 0;
4759
4760 dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4761 if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4762 return -EIO;
4763 if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4764 status = decode_pnfs_layout_types(xdr, fsinfo);
4765 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4766 }
4767 return status;
4768}
4769
4770/*
4771 * The prefered block size for layout directed io
4772 */
4773static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4774 uint32_t *res)
4775{
4776 __be32 *p;
4777
4778 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4779 *res = 0;
4780 if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
4781 p = xdr_inline_decode(xdr, 4);
4782 if (unlikely(!p))
4783 return -EIO;
4784 *res = be32_to_cpup(p);
4785 bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
4786 }
4787 return 0;
4788}
4789
4790/*
4791 * The granularity of a CLONE operation.
4792 */
4793static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
4794 uint32_t *res)
4795{
4796 __be32 *p;
4797
4798 dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
4799 *res = 0;
4800 if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
4801 p = xdr_inline_decode(xdr, 4);
4802 if (unlikely(!p))
4803 return -EIO;
4804 *res = be32_to_cpup(p);
4805 bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
4806 }
4807 return 0;
4808}
4809
4810static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4811{
4812 unsigned int savep;
4813 uint32_t attrlen, bitmap[3];
4814 int status;
4815
4816 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4817 goto xdr_error;
4818 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4819 goto xdr_error;
4820 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4821 goto xdr_error;
4822
4823 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
4824
4825 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4826 goto xdr_error;
4827 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4828 goto xdr_error;
4829 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4830 goto xdr_error;
4831 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4832 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4833 goto xdr_error;
4834 fsinfo->wtpref = fsinfo->wtmax;
4835
4836 status = -EIO;
4837 if (unlikely(bitmap[0]))
4838 goto xdr_error;
4839
4840 status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4841 if (status != 0)
4842 goto xdr_error;
4843 status = decode_attr_pnfstype(xdr, bitmap, fsinfo);
4844 if (status != 0)
4845 goto xdr_error;
4846
4847 status = -EIO;
4848 if (unlikely(bitmap[1]))
4849 goto xdr_error;
4850
4851 status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
4852 if (status)
4853 goto xdr_error;
4854 status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
4855 if (status)
4856 goto xdr_error;
4857
4858 status = verify_attr_len(xdr, savep, attrlen);
4859xdr_error:
4860 dprintk("%s: xdr returned %d!\n", __func__, -status);
4861 return status;
4862}
4863
4864static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4865{
4866 __be32 *p;
4867 uint32_t len;
4868 int status;
4869
4870 /* Zero handle first to allow comparisons */
4871 memset(fh, 0, sizeof(*fh));
4872
4873 status = decode_op_hdr(xdr, OP_GETFH);
4874 if (status)
4875 return status;
4876
4877 p = xdr_inline_decode(xdr, 4);
4878 if (unlikely(!p))
4879 return -EIO;
4880 len = be32_to_cpup(p);
4881 if (len > NFS4_FHSIZE)
4882 return -EIO;
4883 fh->size = len;
4884 p = xdr_inline_decode(xdr, len);
4885 if (unlikely(!p))
4886 return -EIO;
4887 memcpy(fh->data, p, len);
4888 return 0;
4889}
4890
4891static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4892{
4893 int status;
4894
4895 status = decode_op_hdr(xdr, OP_LINK);
4896 if (status)
4897 return status;
4898 return decode_change_info(xdr, cinfo);
4899}
4900
4901/*
4902 * We create the owner, so we know a proper owner.id length is 4.
4903 */
4904static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4905{
4906 uint64_t offset, length, clientid;
4907 __be32 *p;
4908 uint32_t namelen, type;
4909
4910 p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4911 if (unlikely(!p))
4912 return -EIO;
4913 p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4914 p = xdr_decode_hyper(p, &length);
4915 type = be32_to_cpup(p++); /* 4 byte read */
4916 if (fl != NULL) { /* manipulate file lock */
4917 fl->fl_start = (loff_t)offset;
4918 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4919 if (length == ~(uint64_t)0)
4920 fl->fl_end = OFFSET_MAX;
4921 fl->fl_type = F_WRLCK;
4922 if (type & 1)
4923 fl->fl_type = F_RDLCK;
4924 fl->fl_pid = 0;
4925 }
4926 p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4927 namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
4928 p = xdr_inline_decode(xdr, namelen); /* variable size field */
4929 if (likely(!p))
4930 return -EIO;
4931 return -NFS4ERR_DENIED;
4932}
4933
4934static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4935{
4936 int status;
4937
4938 status = decode_op_hdr(xdr, OP_LOCK);
4939 if (status == -EIO)
4940 goto out;
4941 if (status == 0) {
4942 status = decode_lock_stateid(xdr, &res->stateid);
4943 if (unlikely(status))
4944 goto out;
4945 } else if (status == -NFS4ERR_DENIED)
4946 status = decode_lock_denied(xdr, NULL);
4947 if (res->open_seqid != NULL)
4948 nfs_increment_open_seqid(status, res->open_seqid);
4949 nfs_increment_lock_seqid(status, res->lock_seqid);
4950out:
4951 return status;
4952}
4953
4954static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4955{
4956 int status;
4957 status = decode_op_hdr(xdr, OP_LOCKT);
4958 if (status == -NFS4ERR_DENIED)
4959 return decode_lock_denied(xdr, res->denied);
4960 return status;
4961}
4962
4963static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4964{
4965 int status;
4966
4967 status = decode_op_hdr(xdr, OP_LOCKU);
4968 if (status != -EIO)
4969 nfs_increment_lock_seqid(status, res->seqid);
4970 if (status == 0)
4971 status = decode_lock_stateid(xdr, &res->stateid);
4972 return status;
4973}
4974
4975static int decode_release_lockowner(struct xdr_stream *xdr)
4976{
4977 return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4978}
4979
4980static int decode_lookup(struct xdr_stream *xdr)
4981{
4982 return decode_op_hdr(xdr, OP_LOOKUP);
4983}
4984
4985static int decode_lookupp(struct xdr_stream *xdr)
4986{
4987 return decode_op_hdr(xdr, OP_LOOKUPP);
4988}
4989
4990/* This is too sick! */
4991static int decode_space_limit(struct xdr_stream *xdr,
4992 unsigned long *pagemod_limit)
4993{
4994 __be32 *p;
4995 uint32_t limit_type, nblocks, blocksize;
4996 u64 maxsize = 0;
4997
4998 p = xdr_inline_decode(xdr, 12);
4999 if (unlikely(!p))
5000 return -EIO;
5001 limit_type = be32_to_cpup(p++);
5002 switch (limit_type) {
5003 case NFS4_LIMIT_SIZE:
5004 xdr_decode_hyper(p, &maxsize);
5005 break;
5006 case NFS4_LIMIT_BLOCKS:
5007 nblocks = be32_to_cpup(p++);
5008 blocksize = be32_to_cpup(p);
5009 maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
5010 }
5011 maxsize >>= PAGE_SHIFT;
5012 *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
5013 return 0;
5014}
5015
5016static int decode_rw_delegation(struct xdr_stream *xdr,
5017 uint32_t delegation_type,
5018 struct nfs_openres *res)
5019{
5020 __be32 *p;
5021 int status;
5022
5023 status = decode_delegation_stateid(xdr, &res->delegation);
5024 if (unlikely(status))
5025 return status;
5026 p = xdr_inline_decode(xdr, 4);
5027 if (unlikely(!p))
5028 return -EIO;
5029 res->do_recall = be32_to_cpup(p);
5030
5031 switch (delegation_type) {
5032 case NFS4_OPEN_DELEGATE_READ:
5033 res->delegation_type = FMODE_READ;
5034 break;
5035 case NFS4_OPEN_DELEGATE_WRITE:
5036 res->delegation_type = FMODE_WRITE|FMODE_READ;
5037 if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
5038 return -EIO;
5039 }
5040 return decode_ace(xdr, NULL);
5041}
5042
5043static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5044{
5045 __be32 *p;
5046 uint32_t why_no_delegation;
5047
5048 p = xdr_inline_decode(xdr, 4);
5049 if (unlikely(!p))
5050 return -EIO;
5051 why_no_delegation = be32_to_cpup(p);
5052 switch (why_no_delegation) {
5053 case WND4_CONTENTION:
5054 case WND4_RESOURCE:
5055 xdr_inline_decode(xdr, 4);
5056 /* Ignore for now */
5057 }
5058 return 0;
5059}
5060
5061static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
5062{
5063 __be32 *p;
5064 uint32_t delegation_type;
5065
5066 p = xdr_inline_decode(xdr, 4);
5067 if (unlikely(!p))
5068 return -EIO;
5069 delegation_type = be32_to_cpup(p);
5070 res->delegation_type = 0;
5071 switch (delegation_type) {
5072 case NFS4_OPEN_DELEGATE_NONE:
5073 return 0;
5074 case NFS4_OPEN_DELEGATE_READ:
5075 case NFS4_OPEN_DELEGATE_WRITE:
5076 return decode_rw_delegation(xdr, delegation_type, res);
5077 case NFS4_OPEN_DELEGATE_NONE_EXT:
5078 return decode_no_delegation(xdr, res);
5079 }
5080 return -EIO;
5081}
5082
5083static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
5084{
5085 __be32 *p;
5086 uint32_t savewords, bmlen, i;
5087 int status;
5088
5089 if (!__decode_op_hdr(xdr, OP_OPEN, &status))
5090 return status;
5091 nfs_increment_open_seqid(status, res->seqid);
5092 if (status)
5093 return status;
5094 status = decode_open_stateid(xdr, &res->stateid);
5095 if (unlikely(status))
5096 return status;
5097
5098 decode_change_info(xdr, &res->cinfo);
5099
5100 p = xdr_inline_decode(xdr, 8);
5101 if (unlikely(!p))
5102 return -EIO;
5103 res->rflags = be32_to_cpup(p++);
5104 bmlen = be32_to_cpup(p);
5105 if (bmlen > 10)
5106 goto xdr_error;
5107
5108 p = xdr_inline_decode(xdr, bmlen << 2);
5109 if (unlikely(!p))
5110 return -EIO;
5111 savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
5112 for (i = 0; i < savewords; ++i)
5113 res->attrset[i] = be32_to_cpup(p++);
5114 for (; i < NFS4_BITMAP_SIZE; i++)
5115 res->attrset[i] = 0;
5116
5117 return decode_delegation(xdr, res);
5118xdr_error:
5119 dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
5120 return -EIO;
5121}
5122
5123static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
5124{
5125 int status;
5126
5127 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
5128 if (status != -EIO)
5129 nfs_increment_open_seqid(status, res->seqid);
5130 if (!status)
5131 status = decode_open_stateid(xdr, &res->stateid);
5132 return status;
5133}
5134
5135static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
5136{
5137 int status;
5138
5139 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
5140 if (status != -EIO)
5141 nfs_increment_open_seqid(status, res->seqid);
5142 if (!status)
5143 status = decode_open_stateid(xdr, &res->stateid);
5144 return status;
5145}
5146
5147static int decode_putfh(struct xdr_stream *xdr)
5148{
5149 return decode_op_hdr(xdr, OP_PUTFH);
5150}
5151
5152static int decode_putrootfh(struct xdr_stream *xdr)
5153{
5154 return decode_op_hdr(xdr, OP_PUTROOTFH);
5155}
5156
5157static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
5158 struct nfs_pgio_res *res)
5159{
5160 __be32 *p;
5161 uint32_t count, eof, recvd;
5162 int status;
5163
5164 status = decode_op_hdr(xdr, OP_READ);
5165 if (status)
5166 return status;
5167 p = xdr_inline_decode(xdr, 8);
5168 if (unlikely(!p))
5169 return -EIO;
5170 eof = be32_to_cpup(p++);
5171 count = be32_to_cpup(p);
5172 recvd = xdr_read_pages(xdr, count);
5173 if (count > recvd) {
5174 dprintk("NFS: server cheating in read reply: "
5175 "count %u > recvd %u\n", count, recvd);
5176 count = recvd;
5177 eof = 0;
5178 }
5179 res->eof = eof;
5180 res->count = count;
5181 return 0;
5182}
5183
5184static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
5185{
5186 int status;
5187 __be32 verf[2];
5188
5189 status = decode_op_hdr(xdr, OP_READDIR);
5190 if (!status)
5191 status = decode_verifier(xdr, readdir->verifier.data);
5192 if (unlikely(status))
5193 return status;
5194 memcpy(verf, readdir->verifier.data, sizeof(verf));
5195 dprintk("%s: verifier = %08x:%08x\n",
5196 __func__, verf[0], verf[1]);
5197 return xdr_read_pages(xdr, xdr->buf->page_len);
5198}
5199
5200static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
5201{
5202 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5203 u32 len, recvd;
5204 __be32 *p;
5205 int status;
5206
5207 status = decode_op_hdr(xdr, OP_READLINK);
5208 if (status)
5209 return status;
5210
5211 /* Convert length of symlink */
5212 p = xdr_inline_decode(xdr, 4);
5213 if (unlikely(!p))
5214 return -EIO;
5215 len = be32_to_cpup(p);
5216 if (len >= rcvbuf->page_len || len <= 0) {
5217 dprintk("nfs: server returned giant symlink!\n");
5218 return -ENAMETOOLONG;
5219 }
5220 recvd = xdr_read_pages(xdr, len);
5221 if (recvd < len) {
5222 dprintk("NFS: server cheating in readlink reply: "
5223 "count %u > recvd %u\n", len, recvd);
5224 return -EIO;
5225 }
5226 /*
5227 * The XDR encode routine has set things up so that
5228 * the link text will be copied directly into the
5229 * buffer. We just have to do overflow-checking,
5230 * and and null-terminate the text (the VFS expects
5231 * null-termination).
5232 */
5233 xdr_terminate_string(rcvbuf, len);
5234 return 0;
5235}
5236
5237static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
5238{
5239 int status;
5240
5241 status = decode_op_hdr(xdr, OP_REMOVE);
5242 if (status)
5243 goto out;
5244 status = decode_change_info(xdr, cinfo);
5245out:
5246 return status;
5247}
5248
5249static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
5250 struct nfs4_change_info *new_cinfo)
5251{
5252 int status;
5253
5254 status = decode_op_hdr(xdr, OP_RENAME);
5255 if (status)
5256 goto out;
5257 if ((status = decode_change_info(xdr, old_cinfo)))
5258 goto out;
5259 status = decode_change_info(xdr, new_cinfo);
5260out:
5261 return status;
5262}
5263
5264static int decode_renew(struct xdr_stream *xdr)
5265{
5266 return decode_op_hdr(xdr, OP_RENEW);
5267}
5268
5269static int
5270decode_restorefh(struct xdr_stream *xdr)
5271{
5272 return decode_op_hdr(xdr, OP_RESTOREFH);
5273}
5274
5275static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
5276 struct nfs_getaclres *res)
5277{
5278 unsigned int savep;
5279 uint32_t attrlen,
5280 bitmap[3] = {0};
5281 int status;
5282 unsigned int pg_offset;
5283
5284 res->acl_len = 0;
5285 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
5286 goto out;
5287
5288 xdr_enter_page(xdr, xdr->buf->page_len);
5289
5290 /* Calculate the offset of the page data */
5291 pg_offset = xdr->buf->head[0].iov_len;
5292
5293 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
5294 goto out;
5295 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
5296 goto out;
5297
5298 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
5299 return -EIO;
5300 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
5301
5302 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
5303 * are stored with the acl data to handle the problem of
5304 * variable length bitmaps.*/
5305 res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
5306 res->acl_len = attrlen;
5307
5308 /* Check for receive buffer overflow */
5309 if (res->acl_len > (xdr->nwords << 2) ||
5310 res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
5311 res->acl_flags |= NFS4_ACL_TRUNC;
5312 dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
5313 attrlen, xdr->nwords << 2);
5314 }
5315 } else
5316 status = -EOPNOTSUPP;
5317
5318out:
5319 return status;
5320}
5321
5322static int
5323decode_savefh(struct xdr_stream *xdr)
5324{
5325 return decode_op_hdr(xdr, OP_SAVEFH);
5326}
5327
5328static int decode_setattr(struct xdr_stream *xdr)
5329{
5330 int status;
5331
5332 status = decode_op_hdr(xdr, OP_SETATTR);
5333 if (status)
5334 return status;
5335 if (decode_bitmap4(xdr, NULL, 0) >= 0)
5336 return 0;
5337 return -EIO;
5338}
5339
5340static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
5341{
5342 __be32 *p;
5343 uint32_t opnum;
5344 int32_t nfserr;
5345
5346 p = xdr_inline_decode(xdr, 8);
5347 if (unlikely(!p))
5348 return -EIO;
5349 opnum = be32_to_cpup(p++);
5350 if (opnum != OP_SETCLIENTID) {
5351 dprintk("nfs: decode_setclientid: Server returned operation"
5352 " %d\n", opnum);
5353 return -EIO;
5354 }
5355 nfserr = be32_to_cpup(p);
5356 if (nfserr == NFS_OK) {
5357 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
5358 if (unlikely(!p))
5359 return -EIO;
5360 p = xdr_decode_hyper(p, &res->clientid);
5361 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
5362 } else if (nfserr == NFSERR_CLID_INUSE) {
5363 uint32_t len;
5364
5365 /* skip netid string */
5366 p = xdr_inline_decode(xdr, 4);
5367 if (unlikely(!p))
5368 return -EIO;
5369 len = be32_to_cpup(p);
5370 p = xdr_inline_decode(xdr, len);
5371 if (unlikely(!p))
5372 return -EIO;
5373
5374 /* skip uaddr string */
5375 p = xdr_inline_decode(xdr, 4);
5376 if (unlikely(!p))
5377 return -EIO;
5378 len = be32_to_cpup(p);
5379 p = xdr_inline_decode(xdr, len);
5380 if (unlikely(!p))
5381 return -EIO;
5382 return -NFSERR_CLID_INUSE;
5383 } else
5384 return nfs4_stat_to_errno(nfserr);
5385
5386 return 0;
5387}
5388
5389static int decode_setclientid_confirm(struct xdr_stream *xdr)
5390{
5391 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
5392}
5393
5394static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
5395{
5396 __be32 *p;
5397 int status;
5398
5399 status = decode_op_hdr(xdr, OP_WRITE);
5400 if (status)
5401 return status;
5402
5403 p = xdr_inline_decode(xdr, 8);
5404 if (unlikely(!p))
5405 return -EIO;
5406 res->count = be32_to_cpup(p++);
5407 res->verf->committed = be32_to_cpup(p++);
5408 return decode_write_verifier(xdr, &res->verf->verifier);
5409}
5410
5411static int decode_delegreturn(struct xdr_stream *xdr)
5412{
5413 return decode_op_hdr(xdr, OP_DELEGRETURN);
5414}
5415
5416static int decode_secinfo_gss(struct xdr_stream *xdr,
5417 struct nfs4_secinfo4 *flavor)
5418{
5419 u32 oid_len;
5420 __be32 *p;
5421
5422 p = xdr_inline_decode(xdr, 4);
5423 if (unlikely(!p))
5424 return -EIO;
5425 oid_len = be32_to_cpup(p);
5426 if (oid_len > GSS_OID_MAX_LEN)
5427 return -EINVAL;
5428
5429 p = xdr_inline_decode(xdr, oid_len);
5430 if (unlikely(!p))
5431 return -EIO;
5432 memcpy(flavor->flavor_info.oid.data, p, oid_len);
5433 flavor->flavor_info.oid.len = oid_len;
5434
5435 p = xdr_inline_decode(xdr, 8);
5436 if (unlikely(!p))
5437 return -EIO;
5438 flavor->flavor_info.qop = be32_to_cpup(p++);
5439 flavor->flavor_info.service = be32_to_cpup(p);
5440
5441 return 0;
5442}
5443
5444static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5445{
5446 struct nfs4_secinfo4 *sec_flavor;
5447 unsigned int i, num_flavors;
5448 int status;
5449 __be32 *p;
5450
5451 p = xdr_inline_decode(xdr, 4);
5452 if (unlikely(!p))
5453 return -EIO;
5454
5455 res->flavors->num_flavors = 0;
5456 num_flavors = be32_to_cpup(p);
5457
5458 for (i = 0; i < num_flavors; i++) {
5459 sec_flavor = &res->flavors->flavors[i];
5460 if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
5461 break;
5462
5463 p = xdr_inline_decode(xdr, 4);
5464 if (unlikely(!p))
5465 return -EIO;
5466 sec_flavor->flavor = be32_to_cpup(p);
5467
5468 if (sec_flavor->flavor == RPC_AUTH_GSS) {
5469 status = decode_secinfo_gss(xdr, sec_flavor);
5470 if (status)
5471 goto out;
5472 }
5473 res->flavors->num_flavors++;
5474 }
5475
5476 status = 0;
5477out:
5478 return status;
5479}
5480
5481static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5482{
5483 int status = decode_op_hdr(xdr, OP_SECINFO);
5484 if (status)
5485 return status;
5486 return decode_secinfo_common(xdr, res);
5487}
5488
5489#if defined(CONFIG_NFS_V4_1)
5490static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
5491{
5492 int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
5493 if (status)
5494 return status;
5495 return decode_secinfo_common(xdr, res);
5496}
5497
5498static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
5499{
5500 __be32 *p;
5501 uint32_t bitmap_words;
5502 unsigned int i;
5503
5504 p = xdr_inline_decode(xdr, 4);
5505 if (!p)
5506 return -EIO;
5507 bitmap_words = be32_to_cpup(p++);
5508 if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
5509 return -EIO;
5510 p = xdr_inline_decode(xdr, 4 * bitmap_words);
5511 for (i = 0; i < bitmap_words; i++)
5512 op_map->u.words[i] = be32_to_cpup(p++);
5513
5514 return 0;
5515}
5516
5517static int decode_exchange_id(struct xdr_stream *xdr,
5518 struct nfs41_exchange_id_res *res)
5519{
5520 __be32 *p;
5521 uint32_t dummy;
5522 char *dummy_str;
5523 int status;
5524 uint32_t impl_id_count;
5525
5526 status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
5527 if (status)
5528 return status;
5529
5530 p = xdr_inline_decode(xdr, 8);
5531 if (unlikely(!p))
5532 return -EIO;
5533 xdr_decode_hyper(p, &res->clientid);
5534 p = xdr_inline_decode(xdr, 12);
5535 if (unlikely(!p))
5536 return -EIO;
5537 res->seqid = be32_to_cpup(p++);
5538 res->flags = be32_to_cpup(p++);
5539
5540 res->state_protect.how = be32_to_cpup(p);
5541 switch (res->state_protect.how) {
5542 case SP4_NONE:
5543 break;
5544 case SP4_MACH_CRED:
5545 status = decode_op_map(xdr, &res->state_protect.enforce);
5546 if (status)
5547 return status;
5548 status = decode_op_map(xdr, &res->state_protect.allow);
5549 if (status)
5550 return status;
5551 break;
5552 default:
5553 WARN_ON_ONCE(1);
5554 return -EIO;
5555 }
5556
5557 /* server_owner4.so_minor_id */
5558 p = xdr_inline_decode(xdr, 8);
5559 if (unlikely(!p))
5560 return -EIO;
5561 p = xdr_decode_hyper(p, &res->server_owner->minor_id);
5562
5563 /* server_owner4.so_major_id */
5564 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5565 if (unlikely(status))
5566 return status;
5567 memcpy(res->server_owner->major_id, dummy_str, dummy);
5568 res->server_owner->major_id_sz = dummy;
5569
5570 /* server_scope4 */
5571 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5572 if (unlikely(status))
5573 return status;
5574 memcpy(res->server_scope->server_scope, dummy_str, dummy);
5575 res->server_scope->server_scope_sz = dummy;
5576
5577 /* Implementation Id */
5578 p = xdr_inline_decode(xdr, 4);
5579 if (unlikely(!p))
5580 return -EIO;
5581 impl_id_count = be32_to_cpup(p++);
5582
5583 if (impl_id_count) {
5584 /* nii_domain */
5585 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5586 if (unlikely(status))
5587 return status;
5588 memcpy(res->impl_id->domain, dummy_str, dummy);
5589
5590 /* nii_name */
5591 status = decode_opaque_inline(xdr, &dummy, &dummy_str);
5592 if (unlikely(status))
5593 return status;
5594 memcpy(res->impl_id->name, dummy_str, dummy);
5595
5596 /* nii_date */
5597 p = xdr_inline_decode(xdr, 12);
5598 if (unlikely(!p))
5599 return -EIO;
5600 p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
5601 res->impl_id->date.nseconds = be32_to_cpup(p);
5602
5603 /* if there's more than one entry, ignore the rest */
5604 }
5605 return 0;
5606}
5607
5608static int decode_chan_attrs(struct xdr_stream *xdr,
5609 struct nfs4_channel_attrs *attrs)
5610{
5611 __be32 *p;
5612 u32 nr_attrs, val;
5613
5614 p = xdr_inline_decode(xdr, 28);
5615 if (unlikely(!p))
5616 return -EIO;
5617 val = be32_to_cpup(p++); /* headerpadsz */
5618 if (val)
5619 return -EINVAL; /* no support for header padding yet */
5620 attrs->max_rqst_sz = be32_to_cpup(p++);
5621 attrs->max_resp_sz = be32_to_cpup(p++);
5622 attrs->max_resp_sz_cached = be32_to_cpup(p++);
5623 attrs->max_ops = be32_to_cpup(p++);
5624 attrs->max_reqs = be32_to_cpup(p++);
5625 nr_attrs = be32_to_cpup(p);
5626 if (unlikely(nr_attrs > 1)) {
5627 printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
5628 "count %u\n", __func__, nr_attrs);
5629 return -EINVAL;
5630 }
5631 if (nr_attrs == 1) {
5632 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
5633 if (unlikely(!p))
5634 return -EIO;
5635 }
5636 return 0;
5637}
5638
5639static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
5640{
5641 return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
5642}
5643
5644static int decode_bind_conn_to_session(struct xdr_stream *xdr,
5645 struct nfs41_bind_conn_to_session_res *res)
5646{
5647 __be32 *p;
5648 int status;
5649
5650 status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
5651 if (!status)
5652 status = decode_sessionid(xdr, &res->sessionid);
5653 if (unlikely(status))
5654 return status;
5655
5656 /* dir flags, rdma mode bool */
5657 p = xdr_inline_decode(xdr, 8);
5658 if (unlikely(!p))
5659 return -EIO;
5660
5661 res->dir = be32_to_cpup(p++);
5662 if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
5663 return -EIO;
5664 if (be32_to_cpup(p) == 0)
5665 res->use_conn_in_rdma_mode = false;
5666 else
5667 res->use_conn_in_rdma_mode = true;
5668
5669 return 0;
5670}
5671
5672static int decode_create_session(struct xdr_stream *xdr,
5673 struct nfs41_create_session_res *res)
5674{
5675 __be32 *p;
5676 int status;
5677
5678 status = decode_op_hdr(xdr, OP_CREATE_SESSION);
5679 if (!status)
5680 status = decode_sessionid(xdr, &res->sessionid);
5681 if (unlikely(status))
5682 return status;
5683
5684 /* seqid, flags */
5685 p = xdr_inline_decode(xdr, 8);
5686 if (unlikely(!p))
5687 return -EIO;
5688 res->seqid = be32_to_cpup(p++);
5689 res->flags = be32_to_cpup(p);
5690
5691 /* Channel attributes */
5692 status = decode_chan_attrs(xdr, &res->fc_attrs);
5693 if (!status)
5694 status = decode_chan_attrs(xdr, &res->bc_attrs);
5695 return status;
5696}
5697
5698static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
5699{
5700 return decode_op_hdr(xdr, OP_DESTROY_SESSION);
5701}
5702
5703static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
5704{
5705 return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
5706}
5707
5708static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5709{
5710 return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5711}
5712#endif /* CONFIG_NFS_V4_1 */
5713
5714static int decode_sequence(struct xdr_stream *xdr,
5715 struct nfs4_sequence_res *res,
5716 struct rpc_rqst *rqstp)
5717{
5718#if defined(CONFIG_NFS_V4_1)
5719 struct nfs4_session *session;
5720 struct nfs4_sessionid id;
5721 u32 dummy;
5722 int status;
5723 __be32 *p;
5724
5725 if (res->sr_slot == NULL)
5726 return 0;
5727 if (!res->sr_slot->table->session)
5728 return 0;
5729
5730 status = decode_op_hdr(xdr, OP_SEQUENCE);
5731 if (!status)
5732 status = decode_sessionid(xdr, &id);
5733 if (unlikely(status))
5734 goto out_err;
5735
5736 /*
5737 * If the server returns different values for sessionID, slotID or
5738 * sequence number, the server is looney tunes.
5739 */
5740 status = -EREMOTEIO;
5741 session = res->sr_slot->table->session;
5742
5743 if (memcmp(id.data, session->sess_id.data,
5744 NFS4_MAX_SESSIONID_LEN)) {
5745 dprintk("%s Invalid session id\n", __func__);
5746 goto out_err;
5747 }
5748
5749 p = xdr_inline_decode(xdr, 20);
5750 if (unlikely(!p))
5751 goto out_overflow;
5752
5753 /* seqid */
5754 dummy = be32_to_cpup(p++);
5755 if (dummy != res->sr_slot->seq_nr) {
5756 dprintk("%s Invalid sequence number\n", __func__);
5757 goto out_err;
5758 }
5759 /* slot id */
5760 dummy = be32_to_cpup(p++);
5761 if (dummy != res->sr_slot->slot_nr) {
5762 dprintk("%s Invalid slot id\n", __func__);
5763 goto out_err;
5764 }
5765 /* highest slot id */
5766 res->sr_highest_slotid = be32_to_cpup(p++);
5767 /* target highest slot id */
5768 res->sr_target_highest_slotid = be32_to_cpup(p++);
5769 /* result flags */
5770 res->sr_status_flags = be32_to_cpup(p);
5771 status = 0;
5772out_err:
5773 res->sr_status = status;
5774 return status;
5775out_overflow:
5776 status = -EIO;
5777 goto out_err;
5778#else /* CONFIG_NFS_V4_1 */
5779 return 0;
5780#endif /* CONFIG_NFS_V4_1 */
5781}
5782
5783#if defined(CONFIG_NFS_V4_1)
5784static int decode_layout_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
5785{
5786 stateid->type = NFS4_LAYOUT_STATEID_TYPE;
5787 return decode_stateid(xdr, stateid);
5788}
5789
5790static int decode_getdeviceinfo(struct xdr_stream *xdr,
5791 struct nfs4_getdeviceinfo_res *res)
5792{
5793 struct pnfs_device *pdev = res->pdev;
5794 __be32 *p;
5795 uint32_t len, type;
5796 int status;
5797
5798 status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5799 if (status) {
5800 if (status == -ETOOSMALL) {
5801 p = xdr_inline_decode(xdr, 4);
5802 if (unlikely(!p))
5803 return -EIO;
5804 pdev->mincount = be32_to_cpup(p);
5805 dprintk("%s: Min count too small. mincnt = %u\n",
5806 __func__, pdev->mincount);
5807 }
5808 return status;
5809 }
5810
5811 p = xdr_inline_decode(xdr, 8);
5812 if (unlikely(!p))
5813 return -EIO;
5814 type = be32_to_cpup(p++);
5815 if (type != pdev->layout_type) {
5816 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5817 __func__, pdev->layout_type, type);
5818 return -EINVAL;
5819 }
5820 /*
5821 * Get the length of the opaque device_addr4. xdr_read_pages places
5822 * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5823 * and places the remaining xdr data in xdr_buf->tail
5824 */
5825 pdev->mincount = be32_to_cpup(p);
5826 if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
5827 return -EIO;
5828
5829 /* Parse notification bitmap, verifying that it is zero. */
5830 p = xdr_inline_decode(xdr, 4);
5831 if (unlikely(!p))
5832 return -EIO;
5833 len = be32_to_cpup(p);
5834 if (len) {
5835 uint32_t i;
5836
5837 p = xdr_inline_decode(xdr, 4 * len);
5838 if (unlikely(!p))
5839 return -EIO;
5840
5841 res->notification = be32_to_cpup(p++);
5842 for (i = 1; i < len; i++) {
5843 if (be32_to_cpup(p++)) {
5844 dprintk("%s: unsupported notification\n",
5845 __func__);
5846 return -EIO;
5847 }
5848 }
5849 }
5850 return 0;
5851}
5852
5853static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5854 struct nfs4_layoutget_res *res)
5855{
5856 __be32 *p;
5857 int status;
5858 u32 layout_count;
5859 u32 recvd;
5860
5861 status = decode_op_hdr(xdr, OP_LAYOUTGET);
5862 if (status)
5863 goto out;
5864 p = xdr_inline_decode(xdr, 4);
5865 if (unlikely(!p))
5866 goto out_overflow;
5867 res->return_on_close = be32_to_cpup(p);
5868 decode_layout_stateid(xdr, &res->stateid);
5869 p = xdr_inline_decode(xdr, 4);
5870 if (unlikely(!p))
5871 goto out_overflow;
5872 layout_count = be32_to_cpup(p);
5873 if (!layout_count) {
5874 dprintk("%s: server responded with empty layout array\n",
5875 __func__);
5876 status = -EINVAL;
5877 goto out;
5878 }
5879
5880 p = xdr_inline_decode(xdr, 28);
5881 if (unlikely(!p))
5882 goto out_overflow;
5883 p = xdr_decode_hyper(p, &res->range.offset);
5884 p = xdr_decode_hyper(p, &res->range.length);
5885 res->range.iomode = be32_to_cpup(p++);
5886 res->type = be32_to_cpup(p++);
5887 res->layoutp->len = be32_to_cpup(p);
5888
5889 dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5890 __func__,
5891 (unsigned long)res->range.offset,
5892 (unsigned long)res->range.length,
5893 res->range.iomode,
5894 res->type,
5895 res->layoutp->len);
5896
5897 recvd = xdr_read_pages(xdr, res->layoutp->len);
5898 if (res->layoutp->len > recvd) {
5899 dprintk("NFS: server cheating in layoutget reply: "
5900 "layout len %u > recvd %u\n",
5901 res->layoutp->len, recvd);
5902 status = -EINVAL;
5903 goto out;
5904 }
5905
5906 if (layout_count > 1) {
5907 /* We only handle a length one array at the moment. Any
5908 * further entries are just ignored. Note that this means
5909 * the client may see a response that is less than the
5910 * minimum it requested.
5911 */
5912 dprintk("%s: server responded with %d layouts, dropping tail\n",
5913 __func__, layout_count);
5914 }
5915
5916out:
5917 res->status = status;
5918 return status;
5919out_overflow:
5920 status = -EIO;
5921 goto out;
5922}
5923
5924static int decode_layoutreturn(struct xdr_stream *xdr,
5925 struct nfs4_layoutreturn_res *res)
5926{
5927 __be32 *p;
5928 int status;
5929
5930 status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
5931 if (status)
5932 return status;
5933 p = xdr_inline_decode(xdr, 4);
5934 if (unlikely(!p))
5935 return -EIO;
5936 res->lrs_present = be32_to_cpup(p);
5937 if (res->lrs_present)
5938 status = decode_layout_stateid(xdr, &res->stateid);
5939 else
5940 nfs4_stateid_copy(&res->stateid, &invalid_stateid);
5941 return status;
5942}
5943
5944static int decode_layoutcommit(struct xdr_stream *xdr,
5945 struct rpc_rqst *req,
5946 struct nfs4_layoutcommit_res *res)
5947{
5948 __be32 *p;
5949 __u32 sizechanged;
5950 int status;
5951
5952 status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5953 res->status = status;
5954 if (status)
5955 return status;
5956
5957 p = xdr_inline_decode(xdr, 4);
5958 if (unlikely(!p))
5959 return -EIO;
5960 sizechanged = be32_to_cpup(p);
5961
5962 if (sizechanged) {
5963 /* throw away new size */
5964 p = xdr_inline_decode(xdr, 8);
5965 if (unlikely(!p))
5966 return -EIO;
5967 }
5968 return 0;
5969}
5970
5971static int decode_test_stateid(struct xdr_stream *xdr,
5972 struct nfs41_test_stateid_res *res)
5973{
5974 __be32 *p;
5975 int status;
5976 int num_res;
5977
5978 status = decode_op_hdr(xdr, OP_TEST_STATEID);
5979 if (status)
5980 return status;
5981
5982 p = xdr_inline_decode(xdr, 4);
5983 if (unlikely(!p))
5984 return -EIO;
5985 num_res = be32_to_cpup(p++);
5986 if (num_res != 1)
5987 return -EIO;
5988
5989 p = xdr_inline_decode(xdr, 4);
5990 if (unlikely(!p))
5991 return -EIO;
5992 res->status = be32_to_cpup(p++);
5993
5994 return status;
5995}
5996
5997static int decode_free_stateid(struct xdr_stream *xdr,
5998 struct nfs41_free_stateid_res *res)
5999{
6000 res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
6001 return res->status;
6002}
6003#else
6004static inline
6005int decode_layoutreturn(struct xdr_stream *xdr,
6006 struct nfs4_layoutreturn_res *res)
6007{
6008 return 0;
6009}
6010
6011static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
6012 struct nfs4_layoutget_res *res)
6013{
6014 return 0;
6015}
6016
6017#endif /* CONFIG_NFS_V4_1 */
6018
6019/*
6020 * END OF "GENERIC" DECODE ROUTINES.
6021 */
6022
6023/*
6024 * Decode OPEN_DOWNGRADE response
6025 */
6026static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
6027 struct xdr_stream *xdr,
6028 void *data)
6029{
6030 struct nfs_closeres *res = data;
6031 struct compound_hdr hdr;
6032 int status;
6033
6034 status = decode_compound_hdr(xdr, &hdr);
6035 if (status)
6036 goto out;
6037 status = decode_sequence(xdr, &res->seq_res, rqstp);
6038 if (status)
6039 goto out;
6040 status = decode_putfh(xdr);
6041 if (status)
6042 goto out;
6043 if (res->lr_res) {
6044 status = decode_layoutreturn(xdr, res->lr_res);
6045 res->lr_ret = status;
6046 if (status)
6047 goto out;
6048 }
6049 status = decode_open_downgrade(xdr, res);
6050out:
6051 return status;
6052}
6053
6054/*
6055 * Decode ACCESS response
6056 */
6057static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6058 void *data)
6059{
6060 struct nfs4_accessres *res = data;
6061 struct compound_hdr hdr;
6062 int status;
6063
6064 status = decode_compound_hdr(xdr, &hdr);
6065 if (status)
6066 goto out;
6067 status = decode_sequence(xdr, &res->seq_res, rqstp);
6068 if (status)
6069 goto out;
6070 status = decode_putfh(xdr);
6071 if (status != 0)
6072 goto out;
6073 status = decode_access(xdr, &res->supported, &res->access);
6074 if (status != 0)
6075 goto out;
6076 if (res->fattr)
6077 decode_getfattr(xdr, res->fattr, res->server);
6078out:
6079 return status;
6080}
6081
6082/*
6083 * Decode LOOKUP response
6084 */
6085static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6086 void *data)
6087{
6088 struct nfs4_lookup_res *res = data;
6089 struct compound_hdr hdr;
6090 int status;
6091
6092 status = decode_compound_hdr(xdr, &hdr);
6093 if (status)
6094 goto out;
6095 status = decode_sequence(xdr, &res->seq_res, rqstp);
6096 if (status)
6097 goto out;
6098 status = decode_putfh(xdr);
6099 if (status)
6100 goto out;
6101 status = decode_lookup(xdr);
6102 if (status)
6103 goto out;
6104 status = decode_getfh(xdr, res->fh);
6105 if (status)
6106 goto out;
6107 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6108out:
6109 return status;
6110}
6111
6112/*
6113 * Decode LOOKUPP response
6114 */
6115static int nfs4_xdr_dec_lookupp(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6116 void *data)
6117{
6118 struct nfs4_lookupp_res *res = data;
6119 struct compound_hdr hdr;
6120 int status;
6121
6122 status = decode_compound_hdr(xdr, &hdr);
6123 if (status)
6124 goto out;
6125 status = decode_sequence(xdr, &res->seq_res, rqstp);
6126 if (status)
6127 goto out;
6128 status = decode_putfh(xdr);
6129 if (status)
6130 goto out;
6131 status = decode_lookupp(xdr);
6132 if (status)
6133 goto out;
6134 status = decode_getfh(xdr, res->fh);
6135 if (status)
6136 goto out;
6137 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6138out:
6139 return status;
6140}
6141
6142/*
6143 * Decode LOOKUP_ROOT response
6144 */
6145static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
6146 struct xdr_stream *xdr,
6147 void *data)
6148{
6149 struct nfs4_lookup_res *res = data;
6150 struct compound_hdr hdr;
6151 int status;
6152
6153 status = decode_compound_hdr(xdr, &hdr);
6154 if (status)
6155 goto out;
6156 status = decode_sequence(xdr, &res->seq_res, rqstp);
6157 if (status)
6158 goto out;
6159 status = decode_putrootfh(xdr);
6160 if (status)
6161 goto out;
6162 status = decode_getfh(xdr, res->fh);
6163 if (status == 0)
6164 status = decode_getfattr_label(xdr, res->fattr,
6165 res->label, res->server);
6166out:
6167 return status;
6168}
6169
6170/*
6171 * Decode REMOVE response
6172 */
6173static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6174 void *data)
6175{
6176 struct nfs_removeres *res = data;
6177 struct compound_hdr hdr;
6178 int status;
6179
6180 status = decode_compound_hdr(xdr, &hdr);
6181 if (status)
6182 goto out;
6183 status = decode_sequence(xdr, &res->seq_res, rqstp);
6184 if (status)
6185 goto out;
6186 status = decode_putfh(xdr);
6187 if (status)
6188 goto out;
6189 status = decode_remove(xdr, &res->cinfo);
6190out:
6191 return status;
6192}
6193
6194/*
6195 * Decode RENAME response
6196 */
6197static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6198 void *data)
6199{
6200 struct nfs_renameres *res = data;
6201 struct compound_hdr hdr;
6202 int status;
6203
6204 status = decode_compound_hdr(xdr, &hdr);
6205 if (status)
6206 goto out;
6207 status = decode_sequence(xdr, &res->seq_res, rqstp);
6208 if (status)
6209 goto out;
6210 status = decode_putfh(xdr);
6211 if (status)
6212 goto out;
6213 status = decode_savefh(xdr);
6214 if (status)
6215 goto out;
6216 status = decode_putfh(xdr);
6217 if (status)
6218 goto out;
6219 status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
6220out:
6221 return status;
6222}
6223
6224/*
6225 * Decode LINK response
6226 */
6227static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6228 void *data)
6229{
6230 struct nfs4_link_res *res = data;
6231 struct compound_hdr hdr;
6232 int status;
6233
6234 status = decode_compound_hdr(xdr, &hdr);
6235 if (status)
6236 goto out;
6237 status = decode_sequence(xdr, &res->seq_res, rqstp);
6238 if (status)
6239 goto out;
6240 status = decode_putfh(xdr);
6241 if (status)
6242 goto out;
6243 status = decode_savefh(xdr);
6244 if (status)
6245 goto out;
6246 status = decode_putfh(xdr);
6247 if (status)
6248 goto out;
6249 status = decode_link(xdr, &res->cinfo);
6250 if (status)
6251 goto out;
6252 /*
6253 * Note order: OP_LINK leaves the directory as the current
6254 * filehandle.
6255 */
6256 status = decode_restorefh(xdr);
6257 if (status)
6258 goto out;
6259 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6260out:
6261 return status;
6262}
6263
6264/*
6265 * Decode CREATE response
6266 */
6267static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6268 void *data)
6269{
6270 struct nfs4_create_res *res = data;
6271 struct compound_hdr hdr;
6272 int status;
6273
6274 status = decode_compound_hdr(xdr, &hdr);
6275 if (status)
6276 goto out;
6277 status = decode_sequence(xdr, &res->seq_res, rqstp);
6278 if (status)
6279 goto out;
6280 status = decode_putfh(xdr);
6281 if (status)
6282 goto out;
6283 status = decode_create(xdr, &res->dir_cinfo);
6284 if (status)
6285 goto out;
6286 status = decode_getfh(xdr, res->fh);
6287 if (status)
6288 goto out;
6289 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6290out:
6291 return status;
6292}
6293
6294/*
6295 * Decode SYMLINK response
6296 */
6297static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6298 void *res)
6299{
6300 return nfs4_xdr_dec_create(rqstp, xdr, res);
6301}
6302
6303/*
6304 * Decode GETATTR response
6305 */
6306static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6307 void *data)
6308{
6309 struct nfs4_getattr_res *res = data;
6310 struct compound_hdr hdr;
6311 int status;
6312
6313 status = decode_compound_hdr(xdr, &hdr);
6314 if (status)
6315 goto out;
6316 status = decode_sequence(xdr, &res->seq_res, rqstp);
6317 if (status)
6318 goto out;
6319 status = decode_putfh(xdr);
6320 if (status)
6321 goto out;
6322 status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6323out:
6324 return status;
6325}
6326
6327/*
6328 * Encode an SETACL request
6329 */
6330static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
6331 const void *data)
6332{
6333 const struct nfs_setaclargs *args = data;
6334 struct compound_hdr hdr = {
6335 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
6336 };
6337
6338 encode_compound_hdr(xdr, req, &hdr);
6339 encode_sequence(xdr, &args->seq_args, &hdr);
6340 encode_putfh(xdr, args->fh, &hdr);
6341 encode_setacl(xdr, args, &hdr);
6342 encode_nops(&hdr);
6343}
6344
6345/*
6346 * Decode SETACL response
6347 */
6348static int
6349nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6350 void *data)
6351{
6352 struct nfs_setaclres *res = data;
6353 struct compound_hdr hdr;
6354 int status;
6355
6356 status = decode_compound_hdr(xdr, &hdr);
6357 if (status)
6358 goto out;
6359 status = decode_sequence(xdr, &res->seq_res, rqstp);
6360 if (status)
6361 goto out;
6362 status = decode_putfh(xdr);
6363 if (status)
6364 goto out;
6365 status = decode_setattr(xdr);
6366out:
6367 return status;
6368}
6369
6370/*
6371 * Decode GETACL response
6372 */
6373static int
6374nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6375 void *data)
6376{
6377 struct nfs_getaclres *res = data;
6378 struct compound_hdr hdr;
6379 int status;
6380
6381 if (res->acl_scratch != NULL) {
6382 void *p = page_address(res->acl_scratch);
6383 xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
6384 }
6385 status = decode_compound_hdr(xdr, &hdr);
6386 if (status)
6387 goto out;
6388 status = decode_sequence(xdr, &res->seq_res, rqstp);
6389 if (status)
6390 goto out;
6391 status = decode_putfh(xdr);
6392 if (status)
6393 goto out;
6394 status = decode_getacl(xdr, rqstp, res);
6395
6396out:
6397 return status;
6398}
6399
6400/*
6401 * Decode CLOSE response
6402 */
6403static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6404 void *data)
6405{
6406 struct nfs_closeres *res = data;
6407 struct compound_hdr hdr;
6408 int status;
6409
6410 status = decode_compound_hdr(xdr, &hdr);
6411 if (status)
6412 goto out;
6413 status = decode_sequence(xdr, &res->seq_res, rqstp);
6414 if (status)
6415 goto out;
6416 status = decode_putfh(xdr);
6417 if (status)
6418 goto out;
6419 if (res->lr_res) {
6420 status = decode_layoutreturn(xdr, res->lr_res);
6421 res->lr_ret = status;
6422 if (status)
6423 goto out;
6424 }
6425 if (res->fattr != NULL) {
6426 status = decode_getfattr(xdr, res->fattr, res->server);
6427 if (status != 0)
6428 goto out;
6429 }
6430 status = decode_close(xdr, res);
6431out:
6432 return status;
6433}
6434
6435/*
6436 * Decode OPEN response
6437 */
6438static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6439 void *data)
6440{
6441 struct nfs_openres *res = data;
6442 struct compound_hdr hdr;
6443 int status;
6444
6445 status = decode_compound_hdr(xdr, &hdr);
6446 if (status)
6447 goto out;
6448 status = decode_sequence(xdr, &res->seq_res, rqstp);
6449 if (status)
6450 goto out;
6451 status = decode_putfh(xdr);
6452 if (status)
6453 goto out;
6454 status = decode_open(xdr, res);
6455 if (status)
6456 goto out;
6457 status = decode_getfh(xdr, &res->fh);
6458 if (status)
6459 goto out;
6460 if (res->access_request)
6461 decode_access(xdr, &res->access_supported, &res->access_result);
6462 decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
6463 if (res->lg_res)
6464 decode_layoutget(xdr, rqstp, res->lg_res);
6465out:
6466 return status;
6467}
6468
6469/*
6470 * Decode OPEN_CONFIRM response
6471 */
6472static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
6473 struct xdr_stream *xdr,
6474 void *data)
6475{
6476 struct nfs_open_confirmres *res = data;
6477 struct compound_hdr hdr;
6478 int status;
6479
6480 status = decode_compound_hdr(xdr, &hdr);
6481 if (status)
6482 goto out;
6483 status = decode_putfh(xdr);
6484 if (status)
6485 goto out;
6486 status = decode_open_confirm(xdr, res);
6487out:
6488 return status;
6489}
6490
6491/*
6492 * Decode OPEN response
6493 */
6494static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
6495 struct xdr_stream *xdr,
6496 void *data)
6497{
6498 struct nfs_openres *res = data;
6499 struct compound_hdr hdr;
6500 int status;
6501
6502 status = decode_compound_hdr(xdr, &hdr);
6503 if (status)
6504 goto out;
6505 status = decode_sequence(xdr, &res->seq_res, rqstp);
6506 if (status)
6507 goto out;
6508 status = decode_putfh(xdr);
6509 if (status)
6510 goto out;
6511 status = decode_open(xdr, res);
6512 if (status)
6513 goto out;
6514 if (res->access_request)
6515 decode_access(xdr, &res->access_supported, &res->access_result);
6516 decode_getfattr(xdr, res->f_attr, res->server);
6517 if (res->lg_res)
6518 decode_layoutget(xdr, rqstp, res->lg_res);
6519out:
6520 return status;
6521}
6522
6523/*
6524 * Decode SETATTR response
6525 */
6526static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
6527 struct xdr_stream *xdr,
6528 void *data)
6529{
6530 struct nfs_setattrres *res = data;
6531 struct compound_hdr hdr;
6532 int status;
6533
6534 status = decode_compound_hdr(xdr, &hdr);
6535 if (status)
6536 goto out;
6537 status = decode_sequence(xdr, &res->seq_res, rqstp);
6538 if (status)
6539 goto out;
6540 status = decode_putfh(xdr);
6541 if (status)
6542 goto out;
6543 status = decode_setattr(xdr);
6544 if (status)
6545 goto out;
6546 decode_getfattr_label(xdr, res->fattr, res->label, res->server);
6547out:
6548 return status;
6549}
6550
6551/*
6552 * Decode LOCK response
6553 */
6554static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6555 void *data)
6556{
6557 struct nfs_lock_res *res = data;
6558 struct compound_hdr hdr;
6559 int status;
6560
6561 status = decode_compound_hdr(xdr, &hdr);
6562 if (status)
6563 goto out;
6564 status = decode_sequence(xdr, &res->seq_res, rqstp);
6565 if (status)
6566 goto out;
6567 status = decode_putfh(xdr);
6568 if (status)
6569 goto out;
6570 status = decode_lock(xdr, res);
6571out:
6572 return status;
6573}
6574
6575/*
6576 * Decode LOCKT response
6577 */
6578static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6579 void *data)
6580{
6581 struct nfs_lockt_res *res = data;
6582 struct compound_hdr hdr;
6583 int status;
6584
6585 status = decode_compound_hdr(xdr, &hdr);
6586 if (status)
6587 goto out;
6588 status = decode_sequence(xdr, &res->seq_res, rqstp);
6589 if (status)
6590 goto out;
6591 status = decode_putfh(xdr);
6592 if (status)
6593 goto out;
6594 status = decode_lockt(xdr, res);
6595out:
6596 return status;
6597}
6598
6599/*
6600 * Decode LOCKU response
6601 */
6602static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6603 void *data)
6604{
6605 struct nfs_locku_res *res = data;
6606 struct compound_hdr hdr;
6607 int status;
6608
6609 status = decode_compound_hdr(xdr, &hdr);
6610 if (status)
6611 goto out;
6612 status = decode_sequence(xdr, &res->seq_res, rqstp);
6613 if (status)
6614 goto out;
6615 status = decode_putfh(xdr);
6616 if (status)
6617 goto out;
6618 status = decode_locku(xdr, res);
6619out:
6620 return status;
6621}
6622
6623static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
6624 struct xdr_stream *xdr, void *dummy)
6625{
6626 struct compound_hdr hdr;
6627 int status;
6628
6629 status = decode_compound_hdr(xdr, &hdr);
6630 if (!status)
6631 status = decode_release_lockowner(xdr);
6632 return status;
6633}
6634
6635/*
6636 * Decode READLINK response
6637 */
6638static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
6639 struct xdr_stream *xdr,
6640 void *data)
6641{
6642 struct nfs4_readlink_res *res = data;
6643 struct compound_hdr hdr;
6644 int status;
6645
6646 status = decode_compound_hdr(xdr, &hdr);
6647 if (status)
6648 goto out;
6649 status = decode_sequence(xdr, &res->seq_res, rqstp);
6650 if (status)
6651 goto out;
6652 status = decode_putfh(xdr);
6653 if (status)
6654 goto out;
6655 status = decode_readlink(xdr, rqstp);
6656out:
6657 return status;
6658}
6659
6660/*
6661 * Decode READDIR response
6662 */
6663static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6664 void *data)
6665{
6666 struct nfs4_readdir_res *res = data;
6667 struct compound_hdr hdr;
6668 int status;
6669
6670 status = decode_compound_hdr(xdr, &hdr);
6671 if (status)
6672 goto out;
6673 status = decode_sequence(xdr, &res->seq_res, rqstp);
6674 if (status)
6675 goto out;
6676 status = decode_putfh(xdr);
6677 if (status)
6678 goto out;
6679 status = decode_readdir(xdr, rqstp, res);
6680out:
6681 return status;
6682}
6683
6684/*
6685 * Decode Read response
6686 */
6687static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6688 void *data)
6689{
6690 struct nfs_pgio_res *res = data;
6691 struct compound_hdr hdr;
6692 int status;
6693
6694 status = decode_compound_hdr(xdr, &hdr);
6695 res->op_status = hdr.status;
6696 if (status)
6697 goto out;
6698 status = decode_sequence(xdr, &res->seq_res, rqstp);
6699 if (status)
6700 goto out;
6701 status = decode_putfh(xdr);
6702 if (status)
6703 goto out;
6704 status = decode_read(xdr, rqstp, res);
6705 if (!status)
6706 status = res->count;
6707out:
6708 return status;
6709}
6710
6711/*
6712 * Decode WRITE response
6713 */
6714static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6715 void *data)
6716{
6717 struct nfs_pgio_res *res = data;
6718 struct compound_hdr hdr;
6719 int status;
6720
6721 status = decode_compound_hdr(xdr, &hdr);
6722 res->op_status = hdr.status;
6723 if (status)
6724 goto out;
6725 status = decode_sequence(xdr, &res->seq_res, rqstp);
6726 if (status)
6727 goto out;
6728 status = decode_putfh(xdr);
6729 if (status)
6730 goto out;
6731 status = decode_write(xdr, res);
6732 if (status)
6733 goto out;
6734 if (res->fattr)
6735 decode_getfattr(xdr, res->fattr, res->server);
6736 if (!status)
6737 status = res->count;
6738out:
6739 return status;
6740}
6741
6742/*
6743 * Decode COMMIT response
6744 */
6745static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6746 void *data)
6747{
6748 struct nfs_commitres *res = data;
6749 struct compound_hdr hdr;
6750 int status;
6751
6752 status = decode_compound_hdr(xdr, &hdr);
6753 res->op_status = hdr.status;
6754 if (status)
6755 goto out;
6756 status = decode_sequence(xdr, &res->seq_res, rqstp);
6757 if (status)
6758 goto out;
6759 status = decode_putfh(xdr);
6760 if (status)
6761 goto out;
6762 status = decode_commit(xdr, res);
6763out:
6764 return status;
6765}
6766
6767/*
6768 * Decode FSINFO response
6769 */
6770static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
6771 void *data)
6772{
6773 struct nfs4_fsinfo_res *res = data;
6774 struct compound_hdr hdr;
6775 int status;
6776
6777 status = decode_compound_hdr(xdr, &hdr);
6778 if (!status)
6779 status = decode_sequence(xdr, &res->seq_res, req);
6780 if (!status)
6781 status = decode_putfh(xdr);
6782 if (!status)
6783 status = decode_fsinfo(xdr, res->fsinfo);
6784 return status;
6785}
6786
6787/*
6788 * Decode PATHCONF response
6789 */
6790static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
6791 void *data)
6792{
6793 struct nfs4_pathconf_res *res = data;
6794 struct compound_hdr hdr;
6795 int status;
6796
6797 status = decode_compound_hdr(xdr, &hdr);
6798 if (!status)
6799 status = decode_sequence(xdr, &res->seq_res, req);
6800 if (!status)
6801 status = decode_putfh(xdr);
6802 if (!status)
6803 status = decode_pathconf(xdr, res->pathconf);
6804 return status;
6805}
6806
6807/*
6808 * Decode STATFS response
6809 */
6810static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
6811 void *data)
6812{
6813 struct nfs4_statfs_res *res = data;
6814 struct compound_hdr hdr;
6815 int status;
6816
6817 status = decode_compound_hdr(xdr, &hdr);
6818 if (!status)
6819 status = decode_sequence(xdr, &res->seq_res, req);
6820 if (!status)
6821 status = decode_putfh(xdr);
6822 if (!status)
6823 status = decode_statfs(xdr, res->fsstat);
6824 return status;
6825}
6826
6827/*
6828 * Decode GETATTR_BITMAP response
6829 */
6830static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6831 struct xdr_stream *xdr,
6832 void *data)
6833{
6834 struct nfs4_server_caps_res *res = data;
6835 struct compound_hdr hdr;
6836 int status;
6837
6838 status = decode_compound_hdr(xdr, &hdr);
6839 if (status)
6840 goto out;
6841 status = decode_sequence(xdr, &res->seq_res, req);
6842 if (status)
6843 goto out;
6844 status = decode_putfh(xdr);
6845 if (status)
6846 goto out;
6847 status = decode_server_caps(xdr, res);
6848out:
6849 return status;
6850}
6851
6852/*
6853 * Decode RENEW response
6854 */
6855static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6856 void *__unused)
6857{
6858 struct compound_hdr hdr;
6859 int status;
6860
6861 status = decode_compound_hdr(xdr, &hdr);
6862 if (!status)
6863 status = decode_renew(xdr);
6864 return status;
6865}
6866
6867/*
6868 * Decode SETCLIENTID response
6869 */
6870static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6871 struct xdr_stream *xdr,
6872 void *data)
6873{
6874 struct nfs4_setclientid_res *res = data;
6875 struct compound_hdr hdr;
6876 int status;
6877
6878 status = decode_compound_hdr(xdr, &hdr);
6879 if (!status)
6880 status = decode_setclientid(xdr, res);
6881 return status;
6882}
6883
6884/*
6885 * Decode SETCLIENTID_CONFIRM response
6886 */
6887static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6888 struct xdr_stream *xdr,
6889 void *data)
6890{
6891 struct compound_hdr hdr;
6892 int status;
6893
6894 status = decode_compound_hdr(xdr, &hdr);
6895 if (!status)
6896 status = decode_setclientid_confirm(xdr);
6897 return status;
6898}
6899
6900/*
6901 * Decode DELEGRETURN response
6902 */
6903static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6904 struct xdr_stream *xdr,
6905 void *data)
6906{
6907 struct nfs4_delegreturnres *res = data;
6908 struct compound_hdr hdr;
6909 int status;
6910
6911 status = decode_compound_hdr(xdr, &hdr);
6912 if (status)
6913 goto out;
6914 status = decode_sequence(xdr, &res->seq_res, rqstp);
6915 if (status)
6916 goto out;
6917 status = decode_putfh(xdr);
6918 if (status != 0)
6919 goto out;
6920 if (res->lr_res) {
6921 status = decode_layoutreturn(xdr, res->lr_res);
6922 res->lr_ret = status;
6923 if (status)
6924 goto out;
6925 }
6926 if (res->fattr) {
6927 status = decode_getfattr(xdr, res->fattr, res->server);
6928 if (status != 0)
6929 goto out;
6930 }
6931 status = decode_delegreturn(xdr);
6932out:
6933 return status;
6934}
6935
6936/*
6937 * Decode FS_LOCATIONS response
6938 */
6939static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6940 struct xdr_stream *xdr,
6941 void *data)
6942{
6943 struct nfs4_fs_locations_res *res = data;
6944 struct compound_hdr hdr;
6945 int status;
6946
6947 status = decode_compound_hdr(xdr, &hdr);
6948 if (status)
6949 goto out;
6950 status = decode_sequence(xdr, &res->seq_res, req);
6951 if (status)
6952 goto out;
6953 status = decode_putfh(xdr);
6954 if (status)
6955 goto out;
6956 if (res->migration) {
6957 xdr_enter_page(xdr, PAGE_SIZE);
6958 status = decode_getfattr_generic(xdr,
6959 &res->fs_locations->fattr,
6960 NULL, res->fs_locations,
6961 NULL, res->fs_locations->server);
6962 if (status)
6963 goto out;
6964 if (res->renew)
6965 status = decode_renew(xdr);
6966 } else {
6967 status = decode_lookup(xdr);
6968 if (status)
6969 goto out;
6970 xdr_enter_page(xdr, PAGE_SIZE);
6971 status = decode_getfattr_generic(xdr,
6972 &res->fs_locations->fattr,
6973 NULL, res->fs_locations,
6974 NULL, res->fs_locations->server);
6975 }
6976out:
6977 return status;
6978}
6979
6980/*
6981 * Decode SECINFO response
6982 */
6983static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6984 struct xdr_stream *xdr,
6985 void *data)
6986{
6987 struct nfs4_secinfo_res *res = data;
6988 struct compound_hdr hdr;
6989 int status;
6990
6991 status = decode_compound_hdr(xdr, &hdr);
6992 if (status)
6993 goto out;
6994 status = decode_sequence(xdr, &res->seq_res, rqstp);
6995 if (status)
6996 goto out;
6997 status = decode_putfh(xdr);
6998 if (status)
6999 goto out;
7000 status = decode_secinfo(xdr, res);
7001out:
7002 return status;
7003}
7004
7005/*
7006 * Decode FSID_PRESENT response
7007 */
7008static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
7009 struct xdr_stream *xdr,
7010 void *data)
7011{
7012 struct nfs4_fsid_present_res *res = data;
7013 struct compound_hdr hdr;
7014 int status;
7015
7016 status = decode_compound_hdr(xdr, &hdr);
7017 if (status)
7018 goto out;
7019 status = decode_sequence(xdr, &res->seq_res, rqstp);
7020 if (status)
7021 goto out;
7022 status = decode_putfh(xdr);
7023 if (status)
7024 goto out;
7025 status = decode_getfh(xdr, res->fh);
7026 if (status)
7027 goto out;
7028 if (res->renew)
7029 status = decode_renew(xdr);
7030out:
7031 return status;
7032}
7033
7034#if defined(CONFIG_NFS_V4_1)
7035/*
7036 * Decode BIND_CONN_TO_SESSION response
7037 */
7038static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
7039 struct xdr_stream *xdr,
7040 void *res)
7041{
7042 struct compound_hdr hdr;
7043 int status;
7044
7045 status = decode_compound_hdr(xdr, &hdr);
7046 if (!status)
7047 status = decode_bind_conn_to_session(xdr, res);
7048 return status;
7049}
7050
7051/*
7052 * Decode EXCHANGE_ID response
7053 */
7054static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
7055 struct xdr_stream *xdr,
7056 void *res)
7057{
7058 struct compound_hdr hdr;
7059 int status;
7060
7061 status = decode_compound_hdr(xdr, &hdr);
7062 if (!status)
7063 status = decode_exchange_id(xdr, res);
7064 return status;
7065}
7066
7067/*
7068 * Decode CREATE_SESSION response
7069 */
7070static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
7071 struct xdr_stream *xdr,
7072 void *res)
7073{
7074 struct compound_hdr hdr;
7075 int status;
7076
7077 status = decode_compound_hdr(xdr, &hdr);
7078 if (!status)
7079 status = decode_create_session(xdr, res);
7080 return status;
7081}
7082
7083/*
7084 * Decode DESTROY_SESSION response
7085 */
7086static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
7087 struct xdr_stream *xdr,
7088 void *res)
7089{
7090 struct compound_hdr hdr;
7091 int status;
7092
7093 status = decode_compound_hdr(xdr, &hdr);
7094 if (!status)
7095 status = decode_destroy_session(xdr, res);
7096 return status;
7097}
7098
7099/*
7100 * Decode DESTROY_CLIENTID response
7101 */
7102static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
7103 struct xdr_stream *xdr,
7104 void *res)
7105{
7106 struct compound_hdr hdr;
7107 int status;
7108
7109 status = decode_compound_hdr(xdr, &hdr);
7110 if (!status)
7111 status = decode_destroy_clientid(xdr, res);
7112 return status;
7113}
7114
7115/*
7116 * Decode SEQUENCE response
7117 */
7118static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
7119 struct xdr_stream *xdr,
7120 void *res)
7121{
7122 struct compound_hdr hdr;
7123 int status;
7124
7125 status = decode_compound_hdr(xdr, &hdr);
7126 if (!status)
7127 status = decode_sequence(xdr, res, rqstp);
7128 return status;
7129}
7130
7131#endif
7132
7133/*
7134 * Decode GET_LEASE_TIME response
7135 */
7136static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
7137 struct xdr_stream *xdr,
7138 void *data)
7139{
7140 struct nfs4_get_lease_time_res *res = data;
7141 struct compound_hdr hdr;
7142 int status;
7143
7144 status = decode_compound_hdr(xdr, &hdr);
7145 if (!status)
7146 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
7147 if (!status)
7148 status = decode_putrootfh(xdr);
7149 if (!status)
7150 status = decode_fsinfo(xdr, res->lr_fsinfo);
7151 return status;
7152}
7153
7154#ifdef CONFIG_NFS_V4_1
7155
7156/*
7157 * Decode RECLAIM_COMPLETE response
7158 */
7159static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
7160 struct xdr_stream *xdr,
7161 void *data)
7162{
7163 struct nfs41_reclaim_complete_res *res = data;
7164 struct compound_hdr hdr;
7165 int status;
7166
7167 status = decode_compound_hdr(xdr, &hdr);
7168 if (!status)
7169 status = decode_sequence(xdr, &res->seq_res, rqstp);
7170 if (!status)
7171 status = decode_reclaim_complete(xdr, NULL);
7172 return status;
7173}
7174
7175/*
7176 * Decode GETDEVINFO response
7177 */
7178static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
7179 struct xdr_stream *xdr,
7180 void *data)
7181{
7182 struct nfs4_getdeviceinfo_res *res = data;
7183 struct compound_hdr hdr;
7184 int status;
7185
7186 status = decode_compound_hdr(xdr, &hdr);
7187 if (status != 0)
7188 goto out;
7189 status = decode_sequence(xdr, &res->seq_res, rqstp);
7190 if (status != 0)
7191 goto out;
7192 status = decode_getdeviceinfo(xdr, res);
7193out:
7194 return status;
7195}
7196
7197/*
7198 * Decode LAYOUTGET response
7199 */
7200static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
7201 struct xdr_stream *xdr,
7202 void *data)
7203{
7204 struct nfs4_layoutget_res *res = data;
7205 struct compound_hdr hdr;
7206 int status;
7207
7208 status = decode_compound_hdr(xdr, &hdr);
7209 if (status)
7210 goto out;
7211 status = decode_sequence(xdr, &res->seq_res, rqstp);
7212 if (status)
7213 goto out;
7214 status = decode_putfh(xdr);
7215 if (status)
7216 goto out;
7217 status = decode_layoutget(xdr, rqstp, res);
7218out:
7219 return status;
7220}
7221
7222/*
7223 * Decode LAYOUTRETURN response
7224 */
7225static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
7226 struct xdr_stream *xdr,
7227 void *data)
7228{
7229 struct nfs4_layoutreturn_res *res = data;
7230 struct compound_hdr hdr;
7231 int status;
7232
7233 status = decode_compound_hdr(xdr, &hdr);
7234 if (status)
7235 goto out;
7236 status = decode_sequence(xdr, &res->seq_res, rqstp);
7237 if (status)
7238 goto out;
7239 status = decode_putfh(xdr);
7240 if (status)
7241 goto out;
7242 status = decode_layoutreturn(xdr, res);
7243out:
7244 return status;
7245}
7246
7247/*
7248 * Decode LAYOUTCOMMIT response
7249 */
7250static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
7251 struct xdr_stream *xdr,
7252 void *data)
7253{
7254 struct nfs4_layoutcommit_res *res = data;
7255 struct compound_hdr hdr;
7256 int status;
7257
7258 status = decode_compound_hdr(xdr, &hdr);
7259 if (status)
7260 goto out;
7261 status = decode_sequence(xdr, &res->seq_res, rqstp);
7262 if (status)
7263 goto out;
7264 status = decode_putfh(xdr);
7265 if (status)
7266 goto out;
7267 status = decode_layoutcommit(xdr, rqstp, res);
7268 if (status)
7269 goto out;
7270 decode_getfattr(xdr, res->fattr, res->server);
7271out:
7272 return status;
7273}
7274
7275/*
7276 * Decode SECINFO_NO_NAME response
7277 */
7278static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
7279 struct xdr_stream *xdr,
7280 void *data)
7281{
7282 struct nfs4_secinfo_res *res = data;
7283 struct compound_hdr hdr;
7284 int status;
7285
7286 status = decode_compound_hdr(xdr, &hdr);
7287 if (status)
7288 goto out;
7289 status = decode_sequence(xdr, &res->seq_res, rqstp);
7290 if (status)
7291 goto out;
7292 status = decode_putrootfh(xdr);
7293 if (status)
7294 goto out;
7295 status = decode_secinfo_no_name(xdr, res);
7296out:
7297 return status;
7298}
7299
7300/*
7301 * Decode TEST_STATEID response
7302 */
7303static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
7304 struct xdr_stream *xdr,
7305 void *data)
7306{
7307 struct nfs41_test_stateid_res *res = data;
7308 struct compound_hdr hdr;
7309 int status;
7310
7311 status = decode_compound_hdr(xdr, &hdr);
7312 if (status)
7313 goto out;
7314 status = decode_sequence(xdr, &res->seq_res, rqstp);
7315 if (status)
7316 goto out;
7317 status = decode_test_stateid(xdr, res);
7318out:
7319 return status;
7320}
7321
7322/*
7323 * Decode FREE_STATEID response
7324 */
7325static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
7326 struct xdr_stream *xdr,
7327 void *data)
7328{
7329 struct nfs41_free_stateid_res *res = data;
7330 struct compound_hdr hdr;
7331 int status;
7332
7333 status = decode_compound_hdr(xdr, &hdr);
7334 if (status)
7335 goto out;
7336 status = decode_sequence(xdr, &res->seq_res, rqstp);
7337 if (status)
7338 goto out;
7339 status = decode_free_stateid(xdr, res);
7340out:
7341 return status;
7342}
7343#endif /* CONFIG_NFS_V4_1 */
7344
7345/**
7346 * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
7347 * the local page cache.
7348 * @xdr: XDR stream where entry resides
7349 * @entry: buffer to fill in with entry data
7350 * @plus: boolean indicating whether this should be a readdirplus entry
7351 *
7352 * Returns zero if successful, otherwise a negative errno value is
7353 * returned.
7354 *
7355 * This function is not invoked during READDIR reply decoding, but
7356 * rather whenever an application invokes the getdents(2) system call
7357 * on a directory already in our cache.
7358 */
7359int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
7360 bool plus)
7361{
7362 unsigned int savep;
7363 uint32_t bitmap[3] = {0};
7364 uint32_t len;
7365 uint64_t new_cookie;
7366 __be32 *p = xdr_inline_decode(xdr, 4);
7367 if (unlikely(!p))
7368 return -EAGAIN;
7369 if (*p == xdr_zero) {
7370 p = xdr_inline_decode(xdr, 4);
7371 if (unlikely(!p))
7372 return -EAGAIN;
7373 if (*p == xdr_zero)
7374 return -EAGAIN;
7375 entry->eof = 1;
7376 return -EBADCOOKIE;
7377 }
7378
7379 p = xdr_inline_decode(xdr, 12);
7380 if (unlikely(!p))
7381 return -EAGAIN;
7382 p = xdr_decode_hyper(p, &new_cookie);
7383 entry->len = be32_to_cpup(p);
7384
7385 p = xdr_inline_decode(xdr, entry->len);
7386 if (unlikely(!p))
7387 return -EAGAIN;
7388 entry->name = (const char *) p;
7389
7390 /*
7391 * In case the server doesn't return an inode number,
7392 * we fake one here. (We don't use inode number 0,
7393 * since glibc seems to choke on it...)
7394 */
7395 entry->ino = 1;
7396 entry->fattr->valid = 0;
7397
7398 if (decode_attr_bitmap(xdr, bitmap) < 0)
7399 return -EAGAIN;
7400
7401 if (decode_attr_length(xdr, &len, &savep) < 0)
7402 return -EAGAIN;
7403
7404 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
7405 NULL, entry->label, entry->server) < 0)
7406 return -EAGAIN;
7407 if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
7408 entry->ino = entry->fattr->mounted_on_fileid;
7409 else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
7410 entry->ino = entry->fattr->fileid;
7411
7412 entry->d_type = DT_UNKNOWN;
7413 if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
7414 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
7415
7416 entry->prev_cookie = entry->cookie;
7417 entry->cookie = new_cookie;
7418
7419 return 0;
7420}
7421
7422/*
7423 * We need to translate between nfs status return values and
7424 * the local errno values which may not be the same.
7425 */
7426static struct {
7427 int stat;
7428 int errno;
7429} nfs_errtbl[] = {
7430 { NFS4_OK, 0 },
7431 { NFS4ERR_PERM, -EPERM },
7432 { NFS4ERR_NOENT, -ENOENT },
7433 { NFS4ERR_IO, -errno_NFSERR_IO},
7434 { NFS4ERR_NXIO, -ENXIO },
7435 { NFS4ERR_ACCESS, -EACCES },
7436 { NFS4ERR_EXIST, -EEXIST },
7437 { NFS4ERR_XDEV, -EXDEV },
7438 { NFS4ERR_NOTDIR, -ENOTDIR },
7439 { NFS4ERR_ISDIR, -EISDIR },
7440 { NFS4ERR_INVAL, -EINVAL },
7441 { NFS4ERR_FBIG, -EFBIG },
7442 { NFS4ERR_NOSPC, -ENOSPC },
7443 { NFS4ERR_ROFS, -EROFS },
7444 { NFS4ERR_MLINK, -EMLINK },
7445 { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
7446 { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
7447 { NFS4ERR_DQUOT, -EDQUOT },
7448 { NFS4ERR_STALE, -ESTALE },
7449 { NFS4ERR_BADHANDLE, -EBADHANDLE },
7450 { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
7451 { NFS4ERR_NOTSUPP, -ENOTSUPP },
7452 { NFS4ERR_TOOSMALL, -ETOOSMALL },
7453 { NFS4ERR_SERVERFAULT, -EREMOTEIO },
7454 { NFS4ERR_BADTYPE, -EBADTYPE },
7455 { NFS4ERR_LOCKED, -EAGAIN },
7456 { NFS4ERR_SYMLINK, -ELOOP },
7457 { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
7458 { NFS4ERR_DEADLOCK, -EDEADLK },
7459 { -1, -EIO }
7460};
7461
7462/*
7463 * Convert an NFS error code to a local one.
7464 * This one is used jointly by NFSv2 and NFSv3.
7465 */
7466static int
7467nfs4_stat_to_errno(int stat)
7468{
7469 int i;
7470 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
7471 if (nfs_errtbl[i].stat == stat)
7472 return nfs_errtbl[i].errno;
7473 }
7474 if (stat <= 10000 || stat > 10100) {
7475 /* The server is looney tunes. */
7476 return -EREMOTEIO;
7477 }
7478 /* If we cannot translate the error, the recovery routines should
7479 * handle it.
7480 * Note: remaining NFSv4 error codes have values > 10000, so should
7481 * not conflict with native Linux error codes.
7482 */
7483 return -stat;
7484}
7485
7486#ifdef CONFIG_NFS_V4_2
7487#include "nfs42xdr.c"
7488#endif /* CONFIG_NFS_V4_2 */
7489
7490#define PROC(proc, argtype, restype) \
7491[NFSPROC4_CLNT_##proc] = { \
7492 .p_proc = NFSPROC4_COMPOUND, \
7493 .p_encode = nfs4_xdr_##argtype, \
7494 .p_decode = nfs4_xdr_##restype, \
7495 .p_arglen = NFS4_##argtype##_sz, \
7496 .p_replen = NFS4_##restype##_sz, \
7497 .p_statidx = NFSPROC4_CLNT_##proc, \
7498 .p_name = #proc, \
7499}
7500
7501#define STUB(proc) \
7502[NFSPROC4_CLNT_##proc] = { \
7503 .p_name = #proc, \
7504}
7505
7506#if defined(CONFIG_NFS_V4_1)
7507#define PROC41(proc, argtype, restype) \
7508 PROC(proc, argtype, restype)
7509#else
7510#define PROC41(proc, argtype, restype) \
7511 STUB(proc)
7512#endif
7513
7514#if defined(CONFIG_NFS_V4_2)
7515#define PROC42(proc, argtype, restype) \
7516 PROC(proc, argtype, restype)
7517#else
7518#define PROC42(proc, argtype, restype) \
7519 STUB(proc)
7520#endif
7521
7522const struct rpc_procinfo nfs4_procedures[] = {
7523 PROC(READ, enc_read, dec_read),
7524 PROC(WRITE, enc_write, dec_write),
7525 PROC(COMMIT, enc_commit, dec_commit),
7526 PROC(OPEN, enc_open, dec_open),
7527 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
7528 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
7529 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
7530 PROC(CLOSE, enc_close, dec_close),
7531 PROC(SETATTR, enc_setattr, dec_setattr),
7532 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
7533 PROC(RENEW, enc_renew, dec_renew),
7534 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
7535 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
7536 PROC(LOCK, enc_lock, dec_lock),
7537 PROC(LOCKT, enc_lockt, dec_lockt),
7538 PROC(LOCKU, enc_locku, dec_locku),
7539 PROC(ACCESS, enc_access, dec_access),
7540 PROC(GETATTR, enc_getattr, dec_getattr),
7541 PROC(LOOKUP, enc_lookup, dec_lookup),
7542 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
7543 PROC(REMOVE, enc_remove, dec_remove),
7544 PROC(RENAME, enc_rename, dec_rename),
7545 PROC(LINK, enc_link, dec_link),
7546 PROC(SYMLINK, enc_symlink, dec_symlink),
7547 PROC(CREATE, enc_create, dec_create),
7548 PROC(PATHCONF, enc_pathconf, dec_pathconf),
7549 PROC(STATFS, enc_statfs, dec_statfs),
7550 PROC(READLINK, enc_readlink, dec_readlink),
7551 PROC(READDIR, enc_readdir, dec_readdir),
7552 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
7553 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
7554 PROC(GETACL, enc_getacl, dec_getacl),
7555 PROC(SETACL, enc_setacl, dec_setacl),
7556 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
7557 PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
7558 PROC(SECINFO, enc_secinfo, dec_secinfo),
7559 PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present),
7560 PROC41(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
7561 PROC41(CREATE_SESSION, enc_create_session, dec_create_session),
7562 PROC41(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
7563 PROC41(SEQUENCE, enc_sequence, dec_sequence),
7564 PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
7565 PROC41(RECLAIM_COMPLETE,enc_reclaim_complete, dec_reclaim_complete),
7566 PROC41(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
7567 PROC41(LAYOUTGET, enc_layoutget, dec_layoutget),
7568 PROC41(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
7569 PROC41(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
7570 PROC41(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
7571 PROC41(TEST_STATEID, enc_test_stateid, dec_test_stateid),
7572 PROC41(FREE_STATEID, enc_free_stateid, dec_free_stateid),
7573 STUB(GETDEVICELIST),
7574 PROC41(BIND_CONN_TO_SESSION,
7575 enc_bind_conn_to_session, dec_bind_conn_to_session),
7576 PROC41(DESTROY_CLIENTID,enc_destroy_clientid, dec_destroy_clientid),
7577 PROC42(SEEK, enc_seek, dec_seek),
7578 PROC42(ALLOCATE, enc_allocate, dec_allocate),
7579 PROC42(DEALLOCATE, enc_deallocate, dec_deallocate),
7580 PROC42(LAYOUTSTATS, enc_layoutstats, dec_layoutstats),
7581 PROC42(CLONE, enc_clone, dec_clone),
7582 PROC42(COPY, enc_copy, dec_copy),
7583 PROC42(OFFLOAD_CANCEL, enc_offload_cancel, dec_offload_cancel),
7584 PROC(LOOKUPP, enc_lookupp, dec_lookupp),
7585 PROC42(LAYOUTERROR, enc_layouterror, dec_layouterror),
7586};
7587
7588static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
7589const struct rpc_version nfs_version4 = {
7590 .number = 4,
7591 .nrprocs = ARRAY_SIZE(nfs4_procedures),
7592 .procs = nfs4_procedures,
7593 .counts = nfs_version4_counts,
7594};
7595
7596/*
7597 * Local variables:
7598 * c-basic-offset: 8
7599 * End:
7600 */