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[PATCH] NFSv4: Map a couple of NFSv4 errors to EINVAL.
[linux-block.git] / fs / nfs / nfs4xdr.c
CommitLineData
1da177e4
LT		 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/slab.h>
42#include <linux/utsname.h>
43#include <linux/errno.h>
44#include <linux/string.h>
45#include <linux/in.h>
46#include <linux/pagemap.h>
47#include <linux/proc_fs.h>
48#include <linux/kdev_t.h>
49#include <linux/sunrpc/clnt.h>
50#include <linux/nfs.h>
51#include <linux/nfs4.h>
52#include <linux/nfs_fs.h>
53#include <linux/nfs_idmap.h>
4ce79717 54#include "nfs4_fs.h"
1da177e4
LT		 55
56#define NFSDBG_FACILITY NFSDBG_XDR
57
58/* Mapping from NFS error code to "errno" error code. */
59#define errno_NFSERR_IO EIO
60
61static int nfs_stat_to_errno(int);
62
63/* NFSv4 COMPOUND tags are only wanted for debugging purposes */
64#ifdef DEBUG
65#define NFS4_MAXTAGLEN 20
66#else
67#define NFS4_MAXTAGLEN 0
68#endif
69
70/* lock,open owner id:
71 * we currently use size 1 (u32) out of (NFS4_OPAQUE_LIMIT >> 2)
72 */
73#define owner_id_maxsz (1 + 1)
74#define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
75#define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
76#define op_encode_hdr_maxsz (1)
77#define op_decode_hdr_maxsz (2)
78#define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
79 (NFS4_FHSIZE >> 2))
80#define decode_putfh_maxsz (op_decode_hdr_maxsz)
81#define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
82#define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
83#define encode_getfh_maxsz (op_encode_hdr_maxsz)
84#define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
85 ((3+NFS4_FHSIZE) >> 2))
96928206
BF		 86#define nfs4_fattr_bitmap_maxsz 3
87#define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
1da177e4
LT		 88#define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
89#define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
96928206
BF		 90/* This is based on getfattr, which uses the most attributes: */
91#define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
92 3 + 3 + 3 + 2 * nfs4_name_maxsz))
93#define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
94 nfs4_fattr_value_maxsz)
95#define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
1da177e4
LT		 96#define encode_savefh_maxsz (op_encode_hdr_maxsz)
97#define decode_savefh_maxsz (op_decode_hdr_maxsz)
98#define encode_fsinfo_maxsz (op_encode_hdr_maxsz + 2)
99#define decode_fsinfo_maxsz (op_decode_hdr_maxsz + 11)
100#define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
101#define decode_renew_maxsz (op_decode_hdr_maxsz)
102#define encode_setclientid_maxsz \
103 (op_encode_hdr_maxsz + \
104 4 /*server->ip_addr*/ + \
105 1 /*Netid*/ + \
106 6 /*uaddr*/ + \
107 6 + (NFS4_VERIFIER_SIZE >> 2))
108#define decode_setclientid_maxsz \
109 (op_decode_hdr_maxsz + \
110 2 + \
111 1024) /* large value for CLID_INUSE */
112#define encode_setclientid_confirm_maxsz \
113 (op_encode_hdr_maxsz + \
114 3 + (NFS4_VERIFIER_SIZE >> 2))
115#define decode_setclientid_confirm_maxsz \
116 (op_decode_hdr_maxsz)
117#define encode_lookup_maxsz (op_encode_hdr_maxsz + \
118 1 + ((3 + NFS4_FHSIZE) >> 2))
119#define encode_remove_maxsz (op_encode_hdr_maxsz + \
120 nfs4_name_maxsz)
121#define encode_rename_maxsz (op_encode_hdr_maxsz + \
122 2 * nfs4_name_maxsz)
123#define decode_rename_maxsz (op_decode_hdr_maxsz + 5 + 5)
124#define encode_link_maxsz (op_encode_hdr_maxsz + \
125 nfs4_name_maxsz)
126#define decode_link_maxsz (op_decode_hdr_maxsz + 5)
127#define encode_symlink_maxsz (op_encode_hdr_maxsz + \
128 1 + nfs4_name_maxsz + \
129 nfs4_path_maxsz + \
96928206 130 nfs4_fattr_maxsz)
1da177e4
LT		 131#define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
132#define encode_create_maxsz (op_encode_hdr_maxsz + \
133 2 + nfs4_name_maxsz + \
96928206 134 nfs4_fattr_maxsz)
1da177e4
LT		 135#define decode_create_maxsz (op_decode_hdr_maxsz + 8)
136#define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
137#define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
138#define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
139#define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
140#define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
141 encode_putfh_maxsz + \
142 op_encode_hdr_maxsz + 7)
143#define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
144 decode_putfh_maxsz + \
145 op_decode_hdr_maxsz + 2)
146#define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
147 encode_putfh_maxsz + \
148 op_encode_hdr_maxsz)
149#define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
150 decode_putfh_maxsz + \
151 op_decode_hdr_maxsz)
152#define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
153 encode_putfh_maxsz + \
154 op_encode_hdr_maxsz + 9)
155#define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
156 decode_putfh_maxsz + \
157 op_decode_hdr_maxsz + 2)
158#define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
159 encode_putfh_maxsz + \
160 op_encode_hdr_maxsz + 8)
161#define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
162 decode_putfh_maxsz + \
163 op_decode_hdr_maxsz + 4)
164#define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
165 encode_putfh_maxsz + \
166 op_encode_hdr_maxsz + 3)
167#define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
168 decode_putfh_maxsz + \
169 op_decode_hdr_maxsz + 2)
170#define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
171 encode_putfh_maxsz + \
172 op_encode_hdr_maxsz + \
173 13 + 3 + 2 + 64 + \
174 encode_getattr_maxsz + \
175 encode_getfh_maxsz)
176#define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
177 decode_putfh_maxsz + \
178 op_decode_hdr_maxsz + 4 + 5 + 2 + 3 + \
179 decode_getattr_maxsz + \
180 decode_getfh_maxsz)
181#define NFS4_enc_open_confirm_sz \
182 (compound_encode_hdr_maxsz + \
183 encode_putfh_maxsz + \
184 op_encode_hdr_maxsz + 5)
185#define NFS4_dec_open_confirm_sz (compound_decode_hdr_maxsz + \
186 decode_putfh_maxsz + \
187 op_decode_hdr_maxsz + 4)
188#define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
189 encode_putfh_maxsz + \
190 op_encode_hdr_maxsz + \
191 11)
192#define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
193 decode_putfh_maxsz + \
194 op_decode_hdr_maxsz + \
195 4 + 5 + 2 + 3)
196#define NFS4_enc_open_downgrade_sz \
197 (compound_encode_hdr_maxsz + \
198 encode_putfh_maxsz + \
199 op_encode_hdr_maxsz + 7)
200#define NFS4_dec_open_downgrade_sz \
201 (compound_decode_hdr_maxsz + \
202 decode_putfh_maxsz + \
203 op_decode_hdr_maxsz + 4)
204#define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
205 encode_putfh_maxsz + \
206 op_encode_hdr_maxsz + 5)
207#define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
208 decode_putfh_maxsz + \
209 op_decode_hdr_maxsz + 4)
210#define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
211 encode_putfh_maxsz + \
212 op_encode_hdr_maxsz + 4 + \
96928206 213 nfs4_fattr_maxsz + \
1da177e4
LT		 214 encode_getattr_maxsz)
215#define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
216 decode_putfh_maxsz + \
217 op_decode_hdr_maxsz + 3)
218#define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
219 encode_putfh_maxsz + \
220 encode_fsinfo_maxsz)
221#define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
222 decode_putfh_maxsz + \
223 decode_fsinfo_maxsz)
224#define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
225 encode_renew_maxsz)
226#define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
227 decode_renew_maxsz)
228#define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
229 encode_setclientid_maxsz)
230#define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
231 decode_setclientid_maxsz)
232#define NFS4_enc_setclientid_confirm_sz \
233 (compound_encode_hdr_maxsz + \
234 encode_setclientid_confirm_maxsz + \
235 encode_putrootfh_maxsz + \
236 encode_fsinfo_maxsz)
237#define NFS4_dec_setclientid_confirm_sz \
238 (compound_decode_hdr_maxsz + \
239 decode_setclientid_confirm_maxsz + \
240 decode_putrootfh_maxsz + \
241 decode_fsinfo_maxsz)
242#define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
243 encode_putfh_maxsz + \
244 encode_getattr_maxsz + \
245 op_encode_hdr_maxsz + \
246 1 + 1 + 2 + 2 + \
247 1 + 4 + 1 + 2 + \
248 owner_id_maxsz)
249#define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
250 decode_putfh_maxsz + \
251 decode_getattr_maxsz + \
252 op_decode_hdr_maxsz + \
253 2 + 2 + 1 + 2 + \
254 owner_id_maxsz)
255#define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
256 encode_putfh_maxsz + \
257 encode_getattr_maxsz + \
258 op_encode_hdr_maxsz + \
259 1 + 2 + 2 + 2 + \
260 owner_id_maxsz)
261#define NFS4_dec_lockt_sz (NFS4_dec_lock_sz)
262#define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
263 encode_putfh_maxsz + \
264 encode_getattr_maxsz + \
265 op_encode_hdr_maxsz + \
266 1 + 1 + 4 + 2 + 2)
267#define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
268 decode_putfh_maxsz + \
269 decode_getattr_maxsz + \
270 op_decode_hdr_maxsz + 4)
271#define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
272 encode_putfh_maxsz + \
273 op_encode_hdr_maxsz + 1)
274#define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
275 decode_putfh_maxsz + \
276 op_decode_hdr_maxsz + 2)
277#define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
278 encode_putfh_maxsz + \
279 encode_getattr_maxsz)
280#define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
281 decode_putfh_maxsz + \
282 decode_getattr_maxsz)
283#define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
284 encode_putfh_maxsz + \
285 encode_lookup_maxsz + \
286 encode_getattr_maxsz + \
287 encode_getfh_maxsz)
288#define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
289 decode_putfh_maxsz + \
290 op_decode_hdr_maxsz + \
291 decode_getattr_maxsz + \
292 decode_getfh_maxsz)
293#define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
294 encode_putrootfh_maxsz + \
295 encode_getattr_maxsz + \
296 encode_getfh_maxsz)
297#define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
298 decode_putrootfh_maxsz + \
299 decode_getattr_maxsz + \
300 decode_getfh_maxsz)
301#define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
302 encode_putfh_maxsz + \
303 encode_remove_maxsz)
304#define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
305 decode_putfh_maxsz + \
306 op_decode_hdr_maxsz + 5)
307#define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
308 encode_putfh_maxsz + \
309 encode_savefh_maxsz + \
310 encode_putfh_maxsz + \
311 encode_rename_maxsz)
312#define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
313 decode_putfh_maxsz + \
314 decode_savefh_maxsz + \
315 decode_putfh_maxsz + \
316 decode_rename_maxsz)
317#define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
318 encode_putfh_maxsz + \
319 encode_savefh_maxsz + \
320 encode_putfh_maxsz + \
321 encode_link_maxsz)
322#define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
323 decode_putfh_maxsz + \
324 decode_savefh_maxsz + \
325 decode_putfh_maxsz + \
326 decode_link_maxsz)
327#define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
328 encode_putfh_maxsz + \
329 encode_symlink_maxsz + \
330 encode_getattr_maxsz + \
331 encode_getfh_maxsz)
332#define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
333 decode_putfh_maxsz + \
334 decode_symlink_maxsz + \
335 decode_getattr_maxsz + \
336 decode_getfh_maxsz)
337#define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
338 encode_putfh_maxsz + \
339 encode_create_maxsz + \
340 encode_getattr_maxsz + \
341 encode_getfh_maxsz)
342#define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
343 decode_putfh_maxsz + \
344 decode_create_maxsz + \
345 decode_getattr_maxsz + \
346 decode_getfh_maxsz)
347#define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
348 encode_putfh_maxsz + \
349 encode_getattr_maxsz)
350#define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
351 decode_putfh_maxsz + \
352 decode_getattr_maxsz)
353#define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
354 encode_putfh_maxsz + \
355 encode_getattr_maxsz)
356#define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
357 decode_putfh_maxsz + \
358 op_decode_hdr_maxsz + 12)
359#define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
360 encode_getattr_maxsz)
361#define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
362 decode_getattr_maxsz)
363#define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
364 encode_putfh_maxsz + \
365 encode_delegreturn_maxsz)
366#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
367 decode_delegreturn_maxsz)
029d105e
BF		 368#define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
369 encode_putfh_maxsz + \
370 encode_getattr_maxsz)
371#define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
372 decode_putfh_maxsz + \
373 op_decode_hdr_maxsz + \
374 nfs4_fattr_bitmap_maxsz + 1)
23ec6965
BF		 375#define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
376 encode_putfh_maxsz + \
377 op_encode_hdr_maxsz + 4 + \
378 nfs4_fattr_bitmap_maxsz + 1)
379#define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
380 decode_putfh_maxsz + \
381 op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
1da177e4
LT		 382
383static struct {
384 unsigned int mode;
385 unsigned int nfs2type;
386} nfs_type2fmt[] = {
387 { 0, NFNON },
388 { S_IFREG, NFREG },
389 { S_IFDIR, NFDIR },
390 { S_IFBLK, NFBLK },
391 { S_IFCHR, NFCHR },
392 { S_IFLNK, NFLNK },
393 { S_IFSOCK, NFSOCK },
394 { S_IFIFO, NFFIFO },
395 { 0, NFNON },
396 { 0, NFNON },
397};
398
399struct compound_hdr {
400 int32_t status;
401 uint32_t nops;
402 uint32_t taglen;
403 char * tag;
404};
405
406/*
407 * START OF "GENERIC" ENCODE ROUTINES.
408 * These may look a little ugly since they are imported from a "generic"
409 * set of XDR encode/decode routines which are intended to be shared by
410 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
411 *
412 * If the pain of reading these is too great, it should be a straightforward
413 * task to translate them into Linux-specific versions which are more
414 * consistent with the style used in NFSv2/v3...
415 */
416#define WRITE32(n) *p++ = htonl(n)
417#define WRITE64(n) do { \
418 *p++ = htonl((uint32_t)((n) >> 32)); \
419 *p++ = htonl((uint32_t)(n)); \
420} while (0)
421#define WRITEMEM(ptr,nbytes) do { \
422 p = xdr_encode_opaque_fixed(p, ptr, nbytes); \
423} while (0)
424
425#define RESERVE_SPACE(nbytes) do { \
426 p = xdr_reserve_space(xdr, nbytes); \
427 if (!p) printk("RESERVE_SPACE(%d) failed in function %s\n", (int) (nbytes), __FUNCTION__); \
428 BUG_ON(!p); \
429} while (0)
430
431static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
432{
433 uint32_t *p;
434
435 p = xdr_reserve_space(xdr, 4 + len);
436 BUG_ON(p == NULL);
437 xdr_encode_opaque(p, str, len);
438}
439
440static int encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
441{
442 uint32_t *p;
443
444 dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
445 BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
446 RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
447 WRITE32(hdr->taglen);
448 WRITEMEM(hdr->tag, hdr->taglen);
449 WRITE32(NFS4_MINOR_VERSION);
450 WRITE32(hdr->nops);
451 return 0;
452}
453
454static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
455{
456 uint32_t *p;
457
458 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
459 BUG_ON(p == NULL);
460 xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
461}
462
463static int encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
464{
465 char owner_name[IDMAP_NAMESZ];
466 char owner_group[IDMAP_NAMESZ];
467 int owner_namelen = 0;
468 int owner_grouplen = 0;
469 uint32_t *p;
470 uint32_t *q;
471 int len;
472 uint32_t bmval0 = 0;
473 uint32_t bmval1 = 0;
474 int status;
475
476 /*
477 * We reserve enough space to write the entire attribute buffer at once.
478 * In the worst-case, this would be
479 * 12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
480 * = 36 bytes, plus any contribution from variable-length fields
23ec6965 481 * such as owner/group.
1da177e4
LT		 482 */
483 len = 16;
484
485 /* Sigh */
486 if (iap->ia_valid & ATTR_SIZE)
487 len += 8;
488 if (iap->ia_valid & ATTR_MODE)
489 len += 4;
490 if (iap->ia_valid & ATTR_UID) {
491 owner_namelen = nfs_map_uid_to_name(server->nfs4_state, iap->ia_uid, owner_name);
492 if (owner_namelen < 0) {
493 printk(KERN_WARNING "nfs: couldn't resolve uid %d to string\n",
494 iap->ia_uid);
495 /* XXX */
496 strcpy(owner_name, "nobody");
497 owner_namelen = sizeof("nobody") - 1;
498 /* goto out; */
499 }
500 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
501 }
502 if (iap->ia_valid & ATTR_GID) {
503 owner_grouplen = nfs_map_gid_to_group(server->nfs4_state, iap->ia_gid, owner_group);
504 if (owner_grouplen < 0) {
505 printk(KERN_WARNING "nfs4: couldn't resolve gid %d to string\n",
506 iap->ia_gid);
507 strcpy(owner_group, "nobody");
508 owner_grouplen = sizeof("nobody") - 1;
509 /* goto out; */
510 }
511 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
512 }
513 if (iap->ia_valid & ATTR_ATIME_SET)
514 len += 16;
515 else if (iap->ia_valid & ATTR_ATIME)
516 len += 4;
517 if (iap->ia_valid & ATTR_MTIME_SET)
518 len += 16;
519 else if (iap->ia_valid & ATTR_MTIME)
520 len += 4;
521 RESERVE_SPACE(len);
522
523 /*
524 * We write the bitmap length now, but leave the bitmap and the attribute
525 * buffer length to be backfilled at the end of this routine.
526 */
527 WRITE32(2);
528 q = p;
529 p += 3;
530
531 if (iap->ia_valid & ATTR_SIZE) {
532 bmval0 |= FATTR4_WORD0_SIZE;
533 WRITE64(iap->ia_size);
534 }
535 if (iap->ia_valid & ATTR_MODE) {
536 bmval1 |= FATTR4_WORD1_MODE;
537 WRITE32(iap->ia_mode);
538 }
539 if (iap->ia_valid & ATTR_UID) {
540 bmval1 |= FATTR4_WORD1_OWNER;
541 WRITE32(owner_namelen);
542 WRITEMEM(owner_name, owner_namelen);
543 }
544 if (iap->ia_valid & ATTR_GID) {
545 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
546 WRITE32(owner_grouplen);
547 WRITEMEM(owner_group, owner_grouplen);
548 }
549 if (iap->ia_valid & ATTR_ATIME_SET) {
550 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
551 WRITE32(NFS4_SET_TO_CLIENT_TIME);
552 WRITE32(0);
553 WRITE32(iap->ia_mtime.tv_sec);
554 WRITE32(iap->ia_mtime.tv_nsec);
555 }
556 else if (iap->ia_valid & ATTR_ATIME) {
557 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
558 WRITE32(NFS4_SET_TO_SERVER_TIME);
559 }
560 if (iap->ia_valid & ATTR_MTIME_SET) {
561 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
562 WRITE32(NFS4_SET_TO_CLIENT_TIME);
563 WRITE32(0);
564 WRITE32(iap->ia_mtime.tv_sec);
565 WRITE32(iap->ia_mtime.tv_nsec);
566 }
567 else if (iap->ia_valid & ATTR_MTIME) {
568 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
569 WRITE32(NFS4_SET_TO_SERVER_TIME);
570 }
571
572 /*
573 * Now we backfill the bitmap and the attribute buffer length.
574 */
575 if (len != ((char *)p - (char *)q) + 4) {
576 printk ("encode_attr: Attr length calculation error! %u != %Zu\n",
577 len, ((char *)p - (char *)q) + 4);
578 BUG();
579 }
580 len = (char *)p - (char *)q - 12;
581 *q++ = htonl(bmval0);
582 *q++ = htonl(bmval1);
583 *q++ = htonl(len);
584
585 status = 0;
586/* out: */
587 return status;
588}
589
590static int encode_access(struct xdr_stream *xdr, u32 access)
591{
592 uint32_t *p;
593
594 RESERVE_SPACE(8);
595 WRITE32(OP_ACCESS);
596 WRITE32(access);
597
598 return 0;
599}
600
601static int encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
602{
603 uint32_t *p;
604
605 RESERVE_SPACE(8+sizeof(arg->stateid.data));
606 WRITE32(OP_CLOSE);
607 WRITE32(arg->seqid);
608 WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
609
610 return 0;
611}
612
613static int encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args)
614{
615 uint32_t *p;
616
617 RESERVE_SPACE(16);
618 WRITE32(OP_COMMIT);
619 WRITE64(args->offset);
620 WRITE32(args->count);
621
622 return 0;
623}
624
625static int encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create)
626{
627 uint32_t *p;
628
629 RESERVE_SPACE(8);
630 WRITE32(OP_CREATE);
631 WRITE32(create->ftype);
632
633 switch (create->ftype) {
634 case NF4LNK:
635 RESERVE_SPACE(4 + create->u.symlink->len);
636 WRITE32(create->u.symlink->len);
637 WRITEMEM(create->u.symlink->name, create->u.symlink->len);
638 break;
639
640 case NF4BLK: case NF4CHR:
641 RESERVE_SPACE(8);
642 WRITE32(create->u.device.specdata1);
643 WRITE32(create->u.device.specdata2);
644 break;
645
646 default:
647 break;
648 }
649
650 RESERVE_SPACE(4 + create->name->len);
651 WRITE32(create->name->len);
652 WRITEMEM(create->name->name, create->name->len);
653
654 return encode_attrs(xdr, create->attrs, create->server);
655}
656
657static int encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap)
658{
659 uint32_t *p;
660
661 RESERVE_SPACE(12);
662 WRITE32(OP_GETATTR);
663 WRITE32(1);
664 WRITE32(bitmap);
665 return 0;
666}
667
668static int encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1)
669{
670 uint32_t *p;
671
672 RESERVE_SPACE(16);
673 WRITE32(OP_GETATTR);
674 WRITE32(2);
675 WRITE32(bm0);
676 WRITE32(bm1);
677 return 0;
678}
679
680static int encode_getfattr(struct xdr_stream *xdr, const u32* bitmask)
681{
1da177e4
LT		 682 return encode_getattr_two(xdr,
683 bitmask[0] & nfs4_fattr_bitmap[0],
684 bitmask[1] & nfs4_fattr_bitmap[1]);
685}
686
687static int encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask)
688{
1da177e4
LT		 689 return encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
690 bitmask[1] & nfs4_fsinfo_bitmap[1]);
691}
692
693static int encode_getfh(struct xdr_stream *xdr)
694{
695 uint32_t *p;
696
697 RESERVE_SPACE(4);
698 WRITE32(OP_GETFH);
699
700 return 0;
701}
702
703static int encode_link(struct xdr_stream *xdr, const struct qstr *name)
704{
705 uint32_t *p;
706
707 RESERVE_SPACE(8 + name->len);
708 WRITE32(OP_LINK);
709 WRITE32(name->len);
710 WRITEMEM(name->name, name->len);
711
712 return 0;
713}
714
715/*
716 * opcode,type,reclaim,offset,length,new_lock_owner = 32
717 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
718 */
719static int encode_lock(struct xdr_stream *xdr, const struct nfs_lockargs *arg)
720{
721 uint32_t *p;
722 struct nfs_lock_opargs *opargs = arg->u.lock;
723
724 RESERVE_SPACE(32);
725 WRITE32(OP_LOCK);
726 WRITE32(arg->type);
727 WRITE32(opargs->reclaim);
728 WRITE64(arg->offset);
729 WRITE64(arg->length);
730 WRITE32(opargs->new_lock_owner);
731 if (opargs->new_lock_owner){
732 struct nfs_open_to_lock *ol = opargs->u.open_lock;
733
734 RESERVE_SPACE(40);
735 WRITE32(ol->open_seqid);
736 WRITEMEM(&ol->open_stateid, sizeof(ol->open_stateid));
737 WRITE32(ol->lock_seqid);
738 WRITE64(ol->lock_owner.clientid);
739 WRITE32(4);
740 WRITE32(ol->lock_owner.id);
741 }
742 else {
743 struct nfs_exist_lock *el = opargs->u.exist_lock;
744
745 RESERVE_SPACE(20);
746 WRITEMEM(&el->stateid, sizeof(el->stateid));
747 WRITE32(el->seqid);
748 }
749
750 return 0;
751}
752
753static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockargs *arg)
754{
755 uint32_t *p;
756 struct nfs_lowner *opargs = arg->u.lockt;
757
758 RESERVE_SPACE(40);
759 WRITE32(OP_LOCKT);
760 WRITE32(arg->type);
761 WRITE64(arg->offset);
762 WRITE64(arg->length);
763 WRITE64(opargs->clientid);
764 WRITE32(4);
765 WRITE32(opargs->id);
766
767 return 0;
768}
769
770static int encode_locku(struct xdr_stream *xdr, const struct nfs_lockargs *arg)
771{
772 uint32_t *p;
773 struct nfs_locku_opargs *opargs = arg->u.locku;
774
775 RESERVE_SPACE(44);
776 WRITE32(OP_LOCKU);
777 WRITE32(arg->type);
778 WRITE32(opargs->seqid);
779 WRITEMEM(&opargs->stateid, sizeof(opargs->stateid));
780 WRITE64(arg->offset);
781 WRITE64(arg->length);
782
783 return 0;
784}
785
786static int encode_lookup(struct xdr_stream *xdr, const struct qstr *name)
787{
788 int len = name->len;
789 uint32_t *p;
790
791 RESERVE_SPACE(8 + len);
792 WRITE32(OP_LOOKUP);
793 WRITE32(len);
794 WRITEMEM(name->name, len);
795
796 return 0;
797}
798
799static void encode_share_access(struct xdr_stream *xdr, int open_flags)
800{
801 uint32_t *p;
802
803 RESERVE_SPACE(8);
804 switch (open_flags & (FMODE_READ|FMODE_WRITE)) {
805 case FMODE_READ:
806 WRITE32(NFS4_SHARE_ACCESS_READ);
807 break;
808 case FMODE_WRITE:
809 WRITE32(NFS4_SHARE_ACCESS_WRITE);
810 break;
811 case FMODE_READ|FMODE_WRITE:
812 WRITE32(NFS4_SHARE_ACCESS_BOTH);
813 break;
814 default:
815 BUG();
816 }
817 WRITE32(0); /* for linux, share_deny = 0 always */
818}
819
820static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
821{
822 uint32_t *p;
823 /*
824 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
825 * owner 4 = 32
826 */
827 RESERVE_SPACE(8);
828 WRITE32(OP_OPEN);
829 WRITE32(arg->seqid);
830 encode_share_access(xdr, arg->open_flags);
831 RESERVE_SPACE(16);
832 WRITE64(arg->clientid);
833 WRITE32(4);
834 WRITE32(arg->id);
835}
836
837static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
838{
839 uint32_t *p;
840
841 RESERVE_SPACE(4);
842 switch(arg->open_flags & O_EXCL) {
843 case 0:
844 WRITE32(NFS4_CREATE_UNCHECKED);
845 encode_attrs(xdr, arg->u.attrs, arg->server);
846 break;
847 default:
848 WRITE32(NFS4_CREATE_EXCLUSIVE);
849 encode_nfs4_verifier(xdr, &arg->u.verifier);
850 }
851}
852
853static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
854{
855 uint32_t *p;
856
857 RESERVE_SPACE(4);
858 switch (arg->open_flags & O_CREAT) {
859 case 0:
860 WRITE32(NFS4_OPEN_NOCREATE);
861 break;
862 default:
863 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
864 WRITE32(NFS4_OPEN_CREATE);
865 encode_createmode(xdr, arg);
866 }
867}
868
869static inline void encode_delegation_type(struct xdr_stream *xdr, int delegation_type)
870{
871 uint32_t *p;
872
873 RESERVE_SPACE(4);
874 switch (delegation_type) {
875 case 0:
876 WRITE32(NFS4_OPEN_DELEGATE_NONE);
877 break;
878 case FMODE_READ:
879 WRITE32(NFS4_OPEN_DELEGATE_READ);
880 break;
881 case FMODE_WRITE|FMODE_READ:
882 WRITE32(NFS4_OPEN_DELEGATE_WRITE);
883 break;
884 default:
885 BUG();
886 }
887}
888
889static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
890{
891 uint32_t *p;
892
893 RESERVE_SPACE(4);
894 WRITE32(NFS4_OPEN_CLAIM_NULL);
895 encode_string(xdr, name->len, name->name);
896}
897
898static inline void encode_claim_previous(struct xdr_stream *xdr, int type)
899{
900 uint32_t *p;
901
902 RESERVE_SPACE(4);
903 WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
904 encode_delegation_type(xdr, type);
905}
906
907static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
908{
909 uint32_t *p;
910
911 RESERVE_SPACE(4+sizeof(stateid->data));
912 WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
913 WRITEMEM(stateid->data, sizeof(stateid->data));
914 encode_string(xdr, name->len, name->name);
915}
916
917static int encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg)
918{
919 encode_openhdr(xdr, arg);
920 encode_opentype(xdr, arg);
921 switch (arg->claim) {
922 case NFS4_OPEN_CLAIM_NULL:
923 encode_claim_null(xdr, arg->name);
924 break;
925 case NFS4_OPEN_CLAIM_PREVIOUS:
926 encode_claim_previous(xdr, arg->u.delegation_type);
927 break;
928 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
929 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
930 break;
931 default:
932 BUG();
933 }
934 return 0;
935}
936
937static int encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg)
938{
939 uint32_t *p;
940
941 RESERVE_SPACE(8+sizeof(arg->stateid.data));
942 WRITE32(OP_OPEN_CONFIRM);
943 WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
944 WRITE32(arg->seqid);
945
946 return 0;
947}
948
949static int encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
950{
951 uint32_t *p;
952
953 RESERVE_SPACE(8+sizeof(arg->stateid.data));
954 WRITE32(OP_OPEN_DOWNGRADE);
955 WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
956 WRITE32(arg->seqid);
957 encode_share_access(xdr, arg->open_flags);
958 return 0;
959}
960
961static int
962encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh)
963{
964 int len = fh->size;
965 uint32_t *p;
966
967 RESERVE_SPACE(8 + len);
968 WRITE32(OP_PUTFH);
969 WRITE32(len);
970 WRITEMEM(fh->data, len);
971
972 return 0;
973}
974
975static int encode_putrootfh(struct xdr_stream *xdr)
976{
977 uint32_t *p;
978
979 RESERVE_SPACE(4);
980 WRITE32(OP_PUTROOTFH);
981
982 return 0;
983}
984
985static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
986{
1da177e4
LT		 987 nfs4_stateid stateid;
988 uint32_t *p;
989
990 RESERVE_SPACE(16);
991 if (ctx->state != NULL) {
992 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
993 WRITEMEM(stateid.data, sizeof(stateid.data));
994 } else
995 WRITEMEM(zero_stateid.data, sizeof(zero_stateid.data));
996}
997
998static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args)
999{
1000 uint32_t *p;
1001
1002 RESERVE_SPACE(4);
1003 WRITE32(OP_READ);
1004
1005 encode_stateid(xdr, args->context);
1006
1007 RESERVE_SPACE(12);
1008 WRITE64(args->offset);
1009 WRITE32(args->count);
1010
1011 return 0;
1012}
1013
1014static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req)
1015{
1016 struct rpc_auth *auth = req->rq_task->tk_auth;
97d312d0
MN		 1017 uint32_t attrs[2] = {
1018 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1019 FATTR4_WORD1_MOUNTED_ON_FILEID,
1020 };
1da177e4
LT		 1021 int replen;
1022 uint32_t *p;
1023
1024 RESERVE_SPACE(32+sizeof(nfs4_verifier));
1025 WRITE32(OP_READDIR);
1026 WRITE64(readdir->cookie);
1027 WRITEMEM(readdir->verifier.data, sizeof(readdir->verifier.data));
1028 WRITE32(readdir->count >> 1); /* We're not doing readdirplus */
1029 WRITE32(readdir->count);
1030 WRITE32(2);
97d312d0
MN		 1031 /* Switch to mounted_on_fileid if the server supports it */
1032 if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1033 attrs[0] &= ~FATTR4_WORD0_FILEID;
1034 else
1035 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1036 WRITE32(attrs[0] & readdir->bitmask[0]);
1037 WRITE32(attrs[1] & readdir->bitmask[1]);
1da177e4
LT		 1038
1039 /* set up reply kvec
1040 * toplevel_status + taglen + rescount + OP_PUTFH + status
1041 * + OP_READDIR + status + verifer(2) = 9
1042 */
1043 replen = (RPC_REPHDRSIZE + auth->au_rslack + 9) << 2;
1044 xdr_inline_pages(&req->rq_rcv_buf, replen, readdir->pages,
1045 readdir->pgbase, readdir->count);
1046
1047 return 0;
1048}
1049
1050static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
1051{
1052 struct rpc_auth *auth = req->rq_task->tk_auth;
1053 unsigned int replen;
1054 uint32_t *p;
1055
1056 RESERVE_SPACE(4);
1057 WRITE32(OP_READLINK);
1058
1059 /* set up reply kvec
1060 * toplevel_status + taglen + rescount + OP_PUTFH + status
1061 * + OP_READLINK + status + string length = 8
1062 */
1063 replen = (RPC_REPHDRSIZE + auth->au_rslack + 8) << 2;
1064 xdr_inline_pages(&req->rq_rcv_buf, replen, readlink->pages,
1065 readlink->pgbase, readlink->pglen);
1066
1067 return 0;
1068}
1069
1070static int encode_remove(struct xdr_stream *xdr, const struct qstr *name)
1071{
1072 uint32_t *p;
1073
1074 RESERVE_SPACE(8 + name->len);
1075 WRITE32(OP_REMOVE);
1076 WRITE32(name->len);
1077 WRITEMEM(name->name, name->len);
1078
1079 return 0;
1080}
1081
1082static int encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname)
1083{
1084 uint32_t *p;
1085
1086 RESERVE_SPACE(8 + oldname->len);
1087 WRITE32(OP_RENAME);
1088 WRITE32(oldname->len);
1089 WRITEMEM(oldname->name, oldname->len);
1090
1091 RESERVE_SPACE(4 + newname->len);
1092 WRITE32(newname->len);
1093 WRITEMEM(newname->name, newname->len);
1094
1095 return 0;
1096}
1097
1098static int encode_renew(struct xdr_stream *xdr, const struct nfs4_client *client_stateid)
1099{
1100 uint32_t *p;
1101
1102 RESERVE_SPACE(12);
1103 WRITE32(OP_RENEW);
1104 WRITE64(client_stateid->cl_clientid);
1105
1106 return 0;
1107}
1108
23ec6965
BF		 1109static int
1110encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg)
1111{
1112 uint32_t *p;
1113
1114 RESERVE_SPACE(4+sizeof(zero_stateid.data));
1115 WRITE32(OP_SETATTR);
1116 WRITEMEM(zero_stateid.data, sizeof(zero_stateid.data));
1117 RESERVE_SPACE(2*4);
1118 WRITE32(1);
1119 WRITE32(FATTR4_WORD0_ACL);
1120 if (arg->acl_len % 4)
1121 return -EINVAL;
1122 RESERVE_SPACE(4);
1123 WRITE32(arg->acl_len);
1124 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1125 return 0;
1126}
1127
1da177e4
LT		 1128static int
1129encode_savefh(struct xdr_stream *xdr)
1130{
1131 uint32_t *p;
1132
1133 RESERVE_SPACE(4);
1134 WRITE32(OP_SAVEFH);
1135
1136 return 0;
1137}
1138
1139static int encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server)
1140{
1141 int status;
1142 uint32_t *p;
1143
1144 RESERVE_SPACE(4+sizeof(arg->stateid.data));
1145 WRITE32(OP_SETATTR);
1146 WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
1147
1148 if ((status = encode_attrs(xdr, arg->iap, server)))
1149 return status;
1150
1151 return 0;
1152}
1153
1154static int encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid)
1155{
1156 uint32_t *p;
1157
1158 RESERVE_SPACE(4 + sizeof(setclientid->sc_verifier->data));
1159 WRITE32(OP_SETCLIENTID);
1160 WRITEMEM(setclientid->sc_verifier->data, sizeof(setclientid->sc_verifier->data));
1161
1162 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1163 RESERVE_SPACE(4);
1164 WRITE32(setclientid->sc_prog);
1165 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1166 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1167 RESERVE_SPACE(4);
1168 WRITE32(setclientid->sc_cb_ident);
1169
1170 return 0;
1171}
1172
1173static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_client *client_state)
1174{
1175 uint32_t *p;
1176
1177 RESERVE_SPACE(12 + sizeof(client_state->cl_confirm.data));
1178 WRITE32(OP_SETCLIENTID_CONFIRM);
1179 WRITE64(client_state->cl_clientid);
1180 WRITEMEM(client_state->cl_confirm.data, sizeof(client_state->cl_confirm.data));
1181
1182 return 0;
1183}
1184
1185static int encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args)
1186{
1187 uint32_t *p;
1188
1189 RESERVE_SPACE(4);
1190 WRITE32(OP_WRITE);
1191
1192 encode_stateid(xdr, args->context);
1193
1194 RESERVE_SPACE(16);
1195 WRITE64(args->offset);
1196 WRITE32(args->stable);
1197 WRITE32(args->count);
1198
1199 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1200
1201 return 0;
1202}
1203
1204static int encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1205{
1206 uint32_t *p;
1207
1208 RESERVE_SPACE(20);
1209
1210 WRITE32(OP_DELEGRETURN);
1211 WRITEMEM(stateid->data, sizeof(stateid->data));
1212 return 0;
1213
1214}
1215/*
1216 * END OF "GENERIC" ENCODE ROUTINES.
1217 */
1218
1219/*
1220 * Encode an ACCESS request
1221 */
1222static int nfs4_xdr_enc_access(struct rpc_rqst *req, uint32_t *p, const struct nfs4_accessargs *args)
1223{
1224 struct xdr_stream xdr;
1225 struct compound_hdr hdr = {
1226 .nops = 2,
1227 };
1228 int status;
1229
1230 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1231 encode_compound_hdr(&xdr, &hdr);
1232 if ((status = encode_putfh(&xdr, args->fh)) == 0)
1233 status = encode_access(&xdr, args->access);
1234 return status;
1235}
1236
1237/*
1238 * Encode LOOKUP request
1239 */
1240static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, uint32_t *p, const struct nfs4_lookup_arg *args)
1241{
1242 struct xdr_stream xdr;
1243 struct compound_hdr hdr = {
1244 .nops = 4,
1245 };
1246 int status;
1247
1248 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1249 encode_compound_hdr(&xdr, &hdr);
1250 if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1251 goto out;
1252 if ((status = encode_lookup(&xdr, args->name)) != 0)
1253 goto out;
1254 if ((status = encode_getfh(&xdr)) != 0)
1255 goto out;
1256 status = encode_getfattr(&xdr, args->bitmask);
1257out:
1258 return status;
1259}
1260
1261/*
1262 * Encode LOOKUP_ROOT request
1263 */
1264static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, uint32_t *p, const struct nfs4_lookup_root_arg *args)
1265{
1266 struct xdr_stream xdr;
1267 struct compound_hdr hdr = {
1268 .nops = 3,
1269 };
1270 int status;
1271
1272 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1273 encode_compound_hdr(&xdr, &hdr);
1274 if ((status = encode_putrootfh(&xdr)) != 0)
1275 goto out;
1276 if ((status = encode_getfh(&xdr)) == 0)
1277 status = encode_getfattr(&xdr, args->bitmask);
1278out:
1279 return status;
1280}
1281
1282/*
1283 * Encode REMOVE request
1284 */
1285static int nfs4_xdr_enc_remove(struct rpc_rqst *req, uint32_t *p, const struct nfs4_remove_arg *args)
1286{
1287 struct xdr_stream xdr;
1288 struct compound_hdr hdr = {
1289 .nops = 2,
1290 };
1291 int status;
1292
1293 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1294 encode_compound_hdr(&xdr, &hdr);
1295 if ((status = encode_putfh(&xdr, args->fh)) == 0)
1296 status = encode_remove(&xdr, args->name);
1297 return status;
1298}
1299
1300/*
1301 * Encode RENAME request
1302 */
1303static int nfs4_xdr_enc_rename(struct rpc_rqst *req, uint32_t *p, const struct nfs4_rename_arg *args)
1304{
1305 struct xdr_stream xdr;
1306 struct compound_hdr hdr = {
1307 .nops = 4,
1308 };
1309 int status;
1310
1311 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1312 encode_compound_hdr(&xdr, &hdr);
1313 if ((status = encode_putfh(&xdr, args->old_dir)) != 0)
1314 goto out;
1315 if ((status = encode_savefh(&xdr)) != 0)
1316 goto out;
1317 if ((status = encode_putfh(&xdr, args->new_dir)) != 0)
1318 goto out;
1319 status = encode_rename(&xdr, args->old_name, args->new_name);
1320out:
1321 return status;
1322}
1323
1324/*
1325 * Encode LINK request
1326 */
1327static int nfs4_xdr_enc_link(struct rpc_rqst *req, uint32_t *p, const struct nfs4_link_arg *args)
1328{
1329 struct xdr_stream xdr;
1330 struct compound_hdr hdr = {
1331 .nops = 4,
1332 };
1333 int status;
1334
1335 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1336 encode_compound_hdr(&xdr, &hdr);
1337 if ((status = encode_putfh(&xdr, args->fh)) != 0)
1338 goto out;
1339 if ((status = encode_savefh(&xdr)) != 0)
1340 goto out;
1341 if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1342 goto out;
1343 status = encode_link(&xdr, args->name);
1344out:
1345 return status;
1346}
1347
1348/*
1349 * Encode CREATE request
1350 */
1351static int nfs4_xdr_enc_create(struct rpc_rqst *req, uint32_t *p, const struct nfs4_create_arg *args)
1352{
1353 struct xdr_stream xdr;
1354 struct compound_hdr hdr = {
1355 .nops = 4,
1356 };
1357 int status;
1358
1359 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1360 encode_compound_hdr(&xdr, &hdr);
1361 if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1362 goto out;
1363 if ((status = encode_create(&xdr, args)) != 0)
1364 goto out;
1365 if ((status = encode_getfh(&xdr)) != 0)
1366 goto out;
1367 status = encode_getfattr(&xdr, args->bitmask);
1368out:
1369 return status;
1370}
1371
1372/*
1373 * Encode SYMLINK request
1374 */
1375static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, uint32_t *p, const struct nfs4_create_arg *args)
1376{
1377 return nfs4_xdr_enc_create(req, p, args);
1378}
1379
1380/*
1381 * Encode GETATTR request
1382 */
1383static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, uint32_t *p, const struct nfs4_getattr_arg *args)
1384{
1385 struct xdr_stream xdr;
1386 struct compound_hdr hdr = {
1387 .nops = 2,
1388 };
1389 int status;
1390
1391 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1392 encode_compound_hdr(&xdr, &hdr);
1393 if ((status = encode_putfh(&xdr, args->fh)) == 0)
1394 status = encode_getfattr(&xdr, args->bitmask);
1395 return status;
1396}
1397
1398/*
1399 * Encode a CLOSE request
1400 */
1401static int nfs4_xdr_enc_close(struct rpc_rqst *req, uint32_t *p, struct nfs_closeargs *args)
1402{
1403 struct xdr_stream xdr;
1404 struct compound_hdr hdr = {
1405 .nops = 2,
1406 };
1407 int status;
1408
1409 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1410 encode_compound_hdr(&xdr, &hdr);
1411 status = encode_putfh(&xdr, args->fh);
1412 if(status)
1413 goto out;
1414 status = encode_close(&xdr, args);
1415out:
1416 return status;
1417}
1418
1419/*
1420 * Encode an OPEN request
1421 */
1422static int nfs4_xdr_enc_open(struct rpc_rqst *req, uint32_t *p, struct nfs_openargs *args)
1423{
1424 struct xdr_stream xdr;
1425 struct compound_hdr hdr = {
1426 .nops = 4,
1427 };
1428 int status;
1429
1430 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1431 encode_compound_hdr(&xdr, &hdr);
1432 status = encode_putfh(&xdr, args->fh);
1433 if (status)
1434 goto out;
1435 status = encode_open(&xdr, args);
1436 if (status)
1437 goto out;
1438 status = encode_getfh(&xdr);
1439 if (status)
1440 goto out;
1441 status = encode_getfattr(&xdr, args->bitmask);
1442out:
1443 return status;
1444}
1445
1446/*
1447 * Encode an OPEN_CONFIRM request
1448 */
1449static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_open_confirmargs *args)
1450{
1451 struct xdr_stream xdr;
1452 struct compound_hdr hdr = {
1453 .nops = 2,
1454 };
1455 int status;
1456
1457 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1458 encode_compound_hdr(&xdr, &hdr);
1459 status = encode_putfh(&xdr, args->fh);
1460 if(status)
1461 goto out;
1462 status = encode_open_confirm(&xdr, args);
1463out:
1464 return status;
1465}
1466
1467/*
1468 * Encode an OPEN request with no attributes.
1469 */
1470static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, uint32_t *p, struct nfs_openargs *args)
1471{
1472 struct xdr_stream xdr;
1473 struct compound_hdr hdr = {
1474 .nops = 2,
1475 };
1476 int status;
1477
1478 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1479 encode_compound_hdr(&xdr, &hdr);
1480 status = encode_putfh(&xdr, args->fh);
1481 if (status)
1482 goto out;
1483 status = encode_open(&xdr, args);
1484out:
1485 return status;
1486}
1487
1488/*
1489 * Encode an OPEN_DOWNGRADE request
1490 */
1491static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, uint32_t *p, struct nfs_closeargs *args)
1492{
1493 struct xdr_stream xdr;
1494 struct compound_hdr hdr = {
1495 .nops = 2,
1496 };
1497 int status;
1498
1499 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1500 encode_compound_hdr(&xdr, &hdr);
1501 status = encode_putfh(&xdr, args->fh);
1502 if (status)
1503 goto out;
1504 status = encode_open_downgrade(&xdr, args);
1505out:
1506 return status;
1507}
1508
1509/*
1510 * Encode a LOCK request
1511 */
1512static int nfs4_xdr_enc_lock(struct rpc_rqst *req, uint32_t *p, struct nfs_lockargs *args)
1513{
1514 struct xdr_stream xdr;
1515 struct compound_hdr hdr = {
1516 .nops = 2,
1517 };
1518 int status;
1519
1520 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1521 encode_compound_hdr(&xdr, &hdr);
1522 status = encode_putfh(&xdr, args->fh);
1523 if(status)
1524 goto out;
1525 status = encode_lock(&xdr, args);
1526out:
1527 return status;
1528}
1529
1530/*
1531 * Encode a LOCKT request
1532 */
1533static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, uint32_t *p, struct nfs_lockargs *args)
1534{
1535 struct xdr_stream xdr;
1536 struct compound_hdr hdr = {
1537 .nops = 2,
1538 };
1539 int status;
1540
1541 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1542 encode_compound_hdr(&xdr, &hdr);
1543 status = encode_putfh(&xdr, args->fh);
1544 if(status)
1545 goto out;
1546 status = encode_lockt(&xdr, args);
1547out:
1548 return status;
1549}
1550
1551/*
1552 * Encode a LOCKU request
1553 */
1554static int nfs4_xdr_enc_locku(struct rpc_rqst *req, uint32_t *p, struct nfs_lockargs *args)
1555{
1556 struct xdr_stream xdr;
1557 struct compound_hdr hdr = {
1558 .nops = 2,
1559 };
1560 int status;
1561
1562 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1563 encode_compound_hdr(&xdr, &hdr);
1564 status = encode_putfh(&xdr, args->fh);
1565 if(status)
1566 goto out;
1567 status = encode_locku(&xdr, args);
1568out:
1569 return status;
1570}
1571
1572/*
1573 * Encode a READLINK request
1574 */
1575static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, uint32_t *p, const struct nfs4_readlink *args)
1576{
1577 struct xdr_stream xdr;
1578 struct compound_hdr hdr = {
1579 .nops = 2,
1580 };
1581 int status;
1582
1583 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1584 encode_compound_hdr(&xdr, &hdr);
1585 status = encode_putfh(&xdr, args->fh);
1586 if(status)
1587 goto out;
1588 status = encode_readlink(&xdr, args, req);
1589out:
1590 return status;
1591}
1592
1593/*
1594 * Encode a READDIR request
1595 */
1596static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, uint32_t *p, const struct nfs4_readdir_arg *args)
1597{
1598 struct xdr_stream xdr;
1599 struct compound_hdr hdr = {
1600 .nops = 2,
1601 };
1602 int status;
1603
1604 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1605 encode_compound_hdr(&xdr, &hdr);
1606 status = encode_putfh(&xdr, args->fh);
1607 if(status)
1608 goto out;
1609 status = encode_readdir(&xdr, args, req);
1610out:
1611 return status;
1612}
1613
1614/*
1615 * Encode a READ request
1616 */
1617static int nfs4_xdr_enc_read(struct rpc_rqst *req, uint32_t *p, struct nfs_readargs *args)
1618{
1619 struct rpc_auth *auth = req->rq_task->tk_auth;
1620 struct xdr_stream xdr;
1621 struct compound_hdr hdr = {
1622 .nops = 2,
1623 };
1624 int replen, status;
1625
1626 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1627 encode_compound_hdr(&xdr, &hdr);
1628 status = encode_putfh(&xdr, args->fh);
1629 if (status)
1630 goto out;
1631 status = encode_read(&xdr, args);
1632 if (status)
1633 goto out;
1634
1635 /* set up reply kvec
1636 * toplevel status + taglen=0 + rescount + OP_PUTFH + status
1637 * + OP_READ + status + eof + datalen = 9
1638 */
1639 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1640 xdr_inline_pages(&req->rq_rcv_buf, replen,
1641 args->pages, args->pgbase, args->count);
1642out:
1643 return status;
1644}
1645
1646/*
1647 * Encode an SETATTR request
1648 */
1649static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, uint32_t *p, struct nfs_setattrargs *args)
1650
1651{
1652 struct xdr_stream xdr;
1653 struct compound_hdr hdr = {
1654 .nops = 3,
1655 };
1656 int status;
1657
1658 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1659 encode_compound_hdr(&xdr, &hdr);
1660 status = encode_putfh(&xdr, args->fh);
1661 if(status)
1662 goto out;
1663 status = encode_setattr(&xdr, args, args->server);
1664 if(status)
1665 goto out;
1666 status = encode_getfattr(&xdr, args->bitmask);
1667out:
1668 return status;
1669}
1670
029d105e
BF		 1671/*
1672 * Encode a GETACL request
1673 */
1674static int
1675nfs4_xdr_enc_getacl(struct rpc_rqst *req, uint32_t *p,
1676 struct nfs_getaclargs *args)
1677{
1678 struct xdr_stream xdr;
1679 struct rpc_auth *auth = req->rq_task->tk_auth;
1680 struct compound_hdr hdr = {
1681 .nops = 2,
1682 };
1683 int replen, status;
1684
1685 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1686 encode_compound_hdr(&xdr, &hdr);
1687 status = encode_putfh(&xdr, args->fh);
1688 if (status)
1689 goto out;
1690 status = encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0);
1691 /* set up reply buffer: */
1692 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1693 xdr_inline_pages(&req->rq_rcv_buf, replen,
1694 args->acl_pages, args->acl_pgbase, args->acl_len);
1695out:
1696 return status;
1697}
1698
1da177e4
LT		 1699/*
1700 * Encode a WRITE request
1701 */
1702static int nfs4_xdr_enc_write(struct rpc_rqst *req, uint32_t *p, struct nfs_writeargs *args)
1703{
1704 struct xdr_stream xdr;
1705 struct compound_hdr hdr = {
1706 .nops = 2,
1707 };
1708 int status;
1709
1710 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1711 encode_compound_hdr(&xdr, &hdr);
1712 status = encode_putfh(&xdr, args->fh);
1713 if (status)
1714 goto out;
1715 status = encode_write(&xdr, args);
1716out:
1717 return status;
1718}
1719
1720/*
1721 * a COMMIT request
1722 */
1723static int nfs4_xdr_enc_commit(struct rpc_rqst *req, uint32_t *p, struct nfs_writeargs *args)
1724{
1725 struct xdr_stream xdr;
1726 struct compound_hdr hdr = {
1727 .nops = 2,
1728 };
1729 int status;
1730
1731 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1732 encode_compound_hdr(&xdr, &hdr);
1733 status = encode_putfh(&xdr, args->fh);
1734 if (status)
1735 goto out;
1736 status = encode_commit(&xdr, args);
1737out:
1738 return status;
1739}
1740
1741/*
1742 * FSINFO request
1743 */
1744static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs4_fsinfo_arg *args)
1745{
1746 struct xdr_stream xdr;
1747 struct compound_hdr hdr = {
1748 .nops = 2,
1749 };
1750 int status;
1751
1752 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1753 encode_compound_hdr(&xdr, &hdr);
1754 status = encode_putfh(&xdr, args->fh);
1755 if (!status)
1756 status = encode_fsinfo(&xdr, args->bitmask);
1757 return status;
1758}
1759
1760/*
1761 * a PATHCONF request
1762 */
1763static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, uint32_t *p, const struct nfs4_pathconf_arg *args)
1764{
1da177e4
LT		 1765 struct xdr_stream xdr;
1766 struct compound_hdr hdr = {
1767 .nops = 2,
1768 };
1769 int status;
1770
1771 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1772 encode_compound_hdr(&xdr, &hdr);
1773 status = encode_putfh(&xdr, args->fh);
1774 if (!status)
1775 status = encode_getattr_one(&xdr,
1776 args->bitmask[0] & nfs4_pathconf_bitmap[0]);
1777 return status;
1778}
1779
1780/*
1781 * a STATFS request
1782 */
1783static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, uint32_t *p, const struct nfs4_statfs_arg *args)
1784{
1da177e4
LT		 1785 struct xdr_stream xdr;
1786 struct compound_hdr hdr = {
1787 .nops = 2,
1788 };
1789 int status;
1790
1791 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1792 encode_compound_hdr(&xdr, &hdr);
1793 status = encode_putfh(&xdr, args->fh);
1794 if (status == 0)
1795 status = encode_getattr_two(&xdr,
1796 args->bitmask[0] & nfs4_statfs_bitmap[0],
1797 args->bitmask[1] & nfs4_statfs_bitmap[1]);
1798 return status;
1799}
1800
1801/*
1802 * GETATTR_BITMAP request
1803 */
1804static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, uint32_t *p, const struct nfs_fh *fhandle)
1805{
1806 struct xdr_stream xdr;
1807 struct compound_hdr hdr = {
1808 .nops = 2,
1809 };
1810 int status;
1811
1812 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1813 encode_compound_hdr(&xdr, &hdr);
1814 status = encode_putfh(&xdr, fhandle);
1815 if (status == 0)
1816 status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
1817 FATTR4_WORD0_LINK_SUPPORT|
1818 FATTR4_WORD0_SYMLINK_SUPPORT|
1819 FATTR4_WORD0_ACLSUPPORT);
1820 return status;
1821}
1822
1823/*
1824 * a RENEW request
1825 */
1826static int nfs4_xdr_enc_renew(struct rpc_rqst *req, uint32_t *p, struct nfs4_client *clp)
1827{
1828 struct xdr_stream xdr;
1829 struct compound_hdr hdr = {
1830 .nops = 1,
1831 };
1832
1833 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1834 encode_compound_hdr(&xdr, &hdr);
1835 return encode_renew(&xdr, clp);
1836}
1837
1838/*
1839 * a SETCLIENTID request
1840 */
1841static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, uint32_t *p, struct nfs4_setclientid *sc)
1842{
1843 struct xdr_stream xdr;
1844 struct compound_hdr hdr = {
1845 .nops = 1,
1846 };
1847
1848 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1849 encode_compound_hdr(&xdr, &hdr);
1850 return encode_setclientid(&xdr, sc);
1851}
1852
1853/*
1854 * a SETCLIENTID_CONFIRM request
1855 */
1856static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs4_client *clp)
1857{
1858 struct xdr_stream xdr;
1859 struct compound_hdr hdr = {
1860 .nops = 3,
1861 };
1862 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
1863 int status;
1864
1865 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1866 encode_compound_hdr(&xdr, &hdr);
1867 status = encode_setclientid_confirm(&xdr, clp);
1868 if (!status)
1869 status = encode_putrootfh(&xdr);
1870 if (!status)
1871 status = encode_fsinfo(&xdr, lease_bitmap);
1872 return status;
1873}
1874
1875/*
1876 * DELEGRETURN request
1877 */
1878static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, uint32_t *p, const struct nfs4_delegreturnargs *args)
1879{
1880 struct xdr_stream xdr;
1881 struct compound_hdr hdr = {
1882 .nops = 2,
1883 };
1884 int status;
1885
1886 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1887 encode_compound_hdr(&xdr, &hdr);
1888 if ((status = encode_putfh(&xdr, args->fhandle)) == 0)
1889 status = encode_delegreturn(&xdr, args->stateid);
1890 return status;
1891}
1892
1893/*
1894 * START OF "GENERIC" DECODE ROUTINES.
1895 * These may look a little ugly since they are imported from a "generic"
1896 * set of XDR encode/decode routines which are intended to be shared by
1897 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1898 *
1899 * If the pain of reading these is too great, it should be a straightforward
1900 * task to translate them into Linux-specific versions which are more
1901 * consistent with the style used in NFSv2/v3...
1902 */
1903#define READ32(x) (x) = ntohl(*p++)
1904#define READ64(x) do { \
1905 (x) = (u64)ntohl(*p++) << 32; \
1906 (x) |= ntohl(*p++); \
1907} while (0)
1908#define READTIME(x) do { \
1909 p++; \
1910 (x.tv_sec) = ntohl(*p++); \
1911 (x.tv_nsec) = ntohl(*p++); \
1912} while (0)
1913#define COPYMEM(x,nbytes) do { \
1914 memcpy((x), p, nbytes); \
1915 p += XDR_QUADLEN(nbytes); \
1916} while (0)
1917
1918#define READ_BUF(nbytes) do { \
1919 p = xdr_inline_decode(xdr, nbytes); \
1920 if (!p) { \
1921 printk(KERN_WARNING "%s: reply buffer overflowed in line %d.", \
1922 __FUNCTION__, __LINE__); \
1923 return -EIO; \
1924 } \
1925} while (0)
1926
1927static int decode_opaque_inline(struct xdr_stream *xdr, uint32_t *len, char **string)
1928{
1929 uint32_t *p;
1930
1931 READ_BUF(4);
1932 READ32(*len);
1933 READ_BUF(*len);
1934 *string = (char *)p;
1935 return 0;
1936}
1937
1938static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
1939{
1940 uint32_t *p;
1941
1942 READ_BUF(8);
1943 READ32(hdr->status);
1944 READ32(hdr->taglen);
1945
1946 READ_BUF(hdr->taglen + 4);
1947 hdr->tag = (char *)p;
1948 p += XDR_QUADLEN(hdr->taglen);
1949 READ32(hdr->nops);
1950 return 0;
1951}
1952
1953static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
1954{
1955 uint32_t *p;
1956 uint32_t opnum;
1957 int32_t nfserr;
1958
1959 READ_BUF(8);
1960 READ32(opnum);
1961 if (opnum != expected) {
1962 printk(KERN_NOTICE
1963 "nfs4_decode_op_hdr: Server returned operation"
1964 " %d but we issued a request for %d\n",
1965 opnum, expected);
1966 return -EIO;
1967 }
1968 READ32(nfserr);
1969 if (nfserr != NFS_OK)
1970 return -nfs_stat_to_errno(nfserr);
1971 return 0;
1972}
1973
1974/* Dummy routine */
1975static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs4_client *clp)
1976{
1977 uint32_t *p;
1978 uint32_t strlen;
1979 char *str;
1980
1981 READ_BUF(12);
1982 return decode_opaque_inline(xdr, &strlen, &str);
1983}
1984
1985static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
1986{
1987 uint32_t bmlen, *p;
1988
1989 READ_BUF(4);
1990 READ32(bmlen);
1991
1992 bitmap[0] = bitmap[1] = 0;
1993 READ_BUF((bmlen << 2));
1994 if (bmlen > 0) {
1995 READ32(bitmap[0]);
1996 if (bmlen > 1)
1997 READ32(bitmap[1]);
1998 }
1999 return 0;
2000}
2001
2002static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, uint32_t **savep)
2003{
2004 uint32_t *p;
2005
2006 READ_BUF(4);
2007 READ32(*attrlen);
2008 *savep = xdr->p;
2009 return 0;
2010}
2011
2012static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2013{
2014 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2015 decode_attr_bitmap(xdr, bitmask);
2016 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2017 } else
2018 bitmask[0] = bitmask[1] = 0;
2019 dprintk("%s: bitmask=0x%x%x\n", __FUNCTION__, bitmask[0], bitmask[1]);
2020 return 0;
2021}
2022
2023static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2024{
2025 uint32_t *p;
2026
2027 *type = 0;
2028 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2029 return -EIO;
2030 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2031 READ_BUF(4);
2032 READ32(*type);
2033 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2034 dprintk("%s: bad type %d\n", __FUNCTION__, *type);
2035 return -EIO;
2036 }
2037 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2038 }
2039 dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
2040 return 0;
2041}
2042
2043static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2044{
2045 uint32_t *p;
2046
2047 *change = 0;
2048 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2049 return -EIO;
2050 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2051 READ_BUF(8);
2052 READ64(*change);
2053 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2054 }
2055 dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
2056 (unsigned long long)*change);
2057 return 0;
2058}
2059
2060static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2061{
2062 uint32_t *p;
2063
2064 *size = 0;
2065 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2066 return -EIO;
2067 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2068 READ_BUF(8);
2069 READ64(*size);
2070 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2071 }
2072 dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
2073 return 0;
2074}
2075
2076static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2077{
2078 uint32_t *p;
2079
2080 *res = 0;
2081 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2082 return -EIO;
2083 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2084 READ_BUF(4);
2085 READ32(*res);
2086 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2087 }
2088 dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2089 return 0;
2090}
2091
2092static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2093{
2094 uint32_t *p;
2095
2096 *res = 0;
2097 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2098 return -EIO;
2099 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2100 READ_BUF(4);
2101 READ32(*res);
2102 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2103 }
2104 dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2105 return 0;
2106}
2107
2108static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fsid *fsid)
2109{
2110 uint32_t *p;
2111
2112 fsid->major = 0;
2113 fsid->minor = 0;
2114 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2115 return -EIO;
2116 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2117 READ_BUF(16);
2118 READ64(fsid->major);
2119 READ64(fsid->minor);
2120 bitmap[0] &= ~FATTR4_WORD0_FSID;
2121 }
2122 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
2123 (unsigned long long)fsid->major,
2124 (unsigned long long)fsid->minor);
2125 return 0;
2126}
2127
2128static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2129{
2130 uint32_t *p;
2131
2132 *res = 60;
2133 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2134 return -EIO;
2135 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2136 READ_BUF(4);
2137 READ32(*res);
2138 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2139 }
2140 dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
2141 return 0;
2142}
2143
2144static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2145{
2146 uint32_t *p;
2147
2148 *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2149 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2150 return -EIO;
2151 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2152 READ_BUF(4);
2153 READ32(*res);
2154 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2155 }
2156 dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
2157 return 0;
2158}
2159
2160static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2161{
2162 uint32_t *p;
2163
2164 *fileid = 0;
2165 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2166 return -EIO;
2167 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2168 READ_BUF(8);
2169 READ64(*fileid);
2170 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2171 }
2172 dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2173 return 0;
2174}
2175
2176static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2177{
2178 uint32_t *p;
2179 int status = 0;
2180
2181 *res = 0;
2182 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2183 return -EIO;
2184 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2185 READ_BUF(8);
2186 READ64(*res);
2187 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2188 }
2189 dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2190 return status;
2191}
2192
2193static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2194{
2195 uint32_t *p;
2196 int status = 0;
2197
2198 *res = 0;
2199 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2200 return -EIO;
2201 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2202 READ_BUF(8);
2203 READ64(*res);
2204 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2205 }
2206 dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2207 return status;
2208}
2209
2210static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2211{
2212 uint32_t *p;
2213 int status = 0;
2214
2215 *res = 0;
2216 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2217 return -EIO;
2218 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2219 READ_BUF(8);
2220 READ64(*res);
2221 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2222 }
2223 dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2224 return status;
2225}
2226
2227static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2228{
2229 uint32_t *p;
2230 int status = 0;
2231
2232 *res = 0;
2233 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2234 return -EIO;
2235 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2236 READ_BUF(8);
2237 READ64(*res);
2238 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2239 }
2240 dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2241 return status;
2242}
2243
2244static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2245{
2246 uint32_t *p;
2247 int status = 0;
2248
2249 *maxlink = 1;
2250 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2251 return -EIO;
2252 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2253 READ_BUF(4);
2254 READ32(*maxlink);
2255 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2256 }
2257 dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
2258 return status;
2259}
2260
2261static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2262{
2263 uint32_t *p;
2264 int status = 0;
2265
2266 *maxname = 1024;
2267 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2268 return -EIO;
2269 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2270 READ_BUF(4);
2271 READ32(*maxname);
2272 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2273 }
2274 dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
2275 return status;
2276}
2277
2278static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2279{
2280 uint32_t *p;
2281 int status = 0;
2282
2283 *res = 1024;
2284 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2285 return -EIO;
2286 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2287 uint64_t maxread;
2288 READ_BUF(8);
2289 READ64(maxread);
2290 if (maxread > 0x7FFFFFFF)
2291 maxread = 0x7FFFFFFF;
2292 *res = (uint32_t)maxread;
2293 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2294 }
2295 dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
2296 return status;
2297}
2298
2299static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2300{
2301 uint32_t *p;
2302 int status = 0;
2303
2304 *res = 1024;
2305 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2306 return -EIO;
2307 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2308 uint64_t maxwrite;
2309 READ_BUF(8);
2310 READ64(maxwrite);
2311 if (maxwrite > 0x7FFFFFFF)
2312 maxwrite = 0x7FFFFFFF;
2313 *res = (uint32_t)maxwrite;
2314 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2315 }
2316 dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
2317 return status;
2318}
2319
2320static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2321{
2322 uint32_t *p;
2323
2324 *mode = 0;
2325 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2326 return -EIO;
2327 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2328 READ_BUF(4);
2329 READ32(*mode);
2330 *mode &= ~S_IFMT;
2331 bitmap[1] &= ~FATTR4_WORD1_MODE;
2332 }
2333 dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
2334 return 0;
2335}
2336
2337static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2338{
2339 uint32_t *p;
2340
2341 *nlink = 1;
2342 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2343 return -EIO;
2344 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2345 READ_BUF(4);
2346 READ32(*nlink);
2347 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2348 }
2349 dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
2350 return 0;
2351}
2352
2353static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *uid)
2354{
2355 uint32_t len, *p;
2356
2357 *uid = -2;
2358 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2359 return -EIO;
2360 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2361 READ_BUF(4);
2362 READ32(len);
2363 READ_BUF(len);
2364 if (len < XDR_MAX_NETOBJ) {
2365 if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2366 dprintk("%s: nfs_map_name_to_uid failed!\n",
2367 __FUNCTION__);
2368 } else
2369 printk(KERN_WARNING "%s: name too long (%u)!\n",
2370 __FUNCTION__, len);
2371 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2372 }
2373 dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
2374 return 0;
2375}
2376
2377static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *gid)
2378{
2379 uint32_t len, *p;
2380
2381 *gid = -2;
2382 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2383 return -EIO;
2384 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2385 READ_BUF(4);
2386 READ32(len);
2387 READ_BUF(len);
2388 if (len < XDR_MAX_NETOBJ) {
2389 if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2390 dprintk("%s: nfs_map_group_to_gid failed!\n",
2391 __FUNCTION__);
2392 } else
2393 printk(KERN_WARNING "%s: name too long (%u)!\n",
2394 __FUNCTION__, len);
2395 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2396 }
2397 dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
2398 return 0;
2399}
2400
2401static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2402{
2403 uint32_t major = 0, minor = 0, *p;
2404
2405 *rdev = MKDEV(0,0);
2406 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2407 return -EIO;
2408 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2409 dev_t tmp;
2410
2411 READ_BUF(8);
2412 READ32(major);
2413 READ32(minor);
2414 tmp = MKDEV(major, minor);
2415 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2416 *rdev = tmp;
2417 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2418 }
2419 dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
2420 return 0;
2421}
2422
2423static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2424{
2425 uint32_t *p;
2426 int status = 0;
2427
2428 *res = 0;
2429 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2430 return -EIO;
2431 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2432 READ_BUF(8);
2433 READ64(*res);
2434 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2435 }
2436 dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2437 return status;
2438}
2439
2440static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2441{
2442 uint32_t *p;
2443 int status = 0;
2444
2445 *res = 0;
2446 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2447 return -EIO;
2448 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2449 READ_BUF(8);
2450 READ64(*res);
2451 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2452 }
2453 dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2454 return status;
2455}
2456
2457static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2458{
2459 uint32_t *p;
2460 int status = 0;
2461
2462 *res = 0;
2463 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2464 return -EIO;
2465 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2466 READ_BUF(8);
2467 READ64(*res);
2468 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2469 }
2470 dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2471 return status;
2472}
2473
2474static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2475{
2476 uint32_t *p;
2477
2478 *used = 0;
2479 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2480 return -EIO;
2481 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2482 READ_BUF(8);
2483 READ64(*used);
2484 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2485 }
2486 dprintk("%s: space used=%Lu\n", __FUNCTION__,
2487 (unsigned long long)*used);
2488 return 0;
2489}
2490
2491static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2492{
2493 uint32_t *p;
2494 uint64_t sec;
2495 uint32_t nsec;
2496
2497 READ_BUF(12);
2498 READ64(sec);
2499 READ32(nsec);
2500 time->tv_sec = (time_t)sec;
2501 time->tv_nsec = (long)nsec;
2502 return 0;
2503}
2504
2505static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2506{
2507 int status = 0;
2508
2509 time->tv_sec = 0;
2510 time->tv_nsec = 0;
2511 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2512 return -EIO;
2513 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2514 status = decode_attr_time(xdr, time);
2515 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2516 }
2517 dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2518 return status;
2519}
2520
2521static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2522{
2523 int status = 0;
2524
2525 time->tv_sec = 0;
2526 time->tv_nsec = 0;
2527 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2528 return -EIO;
2529 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2530 status = decode_attr_time(xdr, time);
2531 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2532 }
2533 dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2534 return status;
2535}
2536
2537static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2538{
2539 int status = 0;
2540
2541 time->tv_sec = 0;
2542 time->tv_nsec = 0;
2543 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2544 return -EIO;
2545 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2546 status = decode_attr_time(xdr, time);
2547 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2548 }
2549 dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2550 return status;
2551}
2552
2553static int verify_attr_len(struct xdr_stream *xdr, uint32_t *savep, uint32_t attrlen)
2554{
2555 unsigned int attrwords = XDR_QUADLEN(attrlen);
2556 unsigned int nwords = xdr->p - savep;
2557
2558 if (unlikely(attrwords != nwords)) {
2559 printk(KERN_WARNING "%s: server returned incorrect attribute length: %u %c %u\n",
2560 __FUNCTION__,
2561 attrwords << 2,
2562 (attrwords < nwords) ? '<' : '>',
2563 nwords << 2);
2564 return -EIO;
2565 }
2566 return 0;
2567}
2568
2569static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2570{
2571 uint32_t *p;
2572
2573 READ_BUF(20);
2574 READ32(cinfo->atomic);
2575 READ64(cinfo->before);
2576 READ64(cinfo->after);
2577 return 0;
2578}
2579
2580static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2581{
2582 uint32_t *p;
2583 uint32_t supp, acc;
2584 int status;
2585
2586 status = decode_op_hdr(xdr, OP_ACCESS);
2587 if (status)
2588 return status;
2589 READ_BUF(8);
2590 READ32(supp);
2591 READ32(acc);
2592 access->supported = supp;
2593 access->access = acc;
2594 return 0;
2595}
2596
2597static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2598{
2599 uint32_t *p;
2600 int status;
2601
2602 status = decode_op_hdr(xdr, OP_CLOSE);
2603 if (status)
2604 return status;
2605 READ_BUF(sizeof(res->stateid.data));
2606 COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2607 return 0;
2608}
2609
2610static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
2611{
2612 uint32_t *p;
2613 int status;
2614
2615 status = decode_op_hdr(xdr, OP_COMMIT);
2616 if (status)
2617 return status;
2618 READ_BUF(8);
2619 COPYMEM(res->verf->verifier, 8);
2620 return 0;
2621}
2622
2623static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2624{
2625 uint32_t *p;
2626 uint32_t bmlen;
2627 int status;
2628
2629 status = decode_op_hdr(xdr, OP_CREATE);
2630 if (status)
2631 return status;
2632 if ((status = decode_change_info(xdr, cinfo)))
2633 return status;
2634 READ_BUF(4);
2635 READ32(bmlen);
2636 READ_BUF(bmlen << 2);
2637 return 0;
2638}
2639
2640static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
2641{
2642 uint32_t *savep;
2643 uint32_t attrlen,
2644 bitmap[2] = {0};
2645 int status;
2646
2647 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2648 goto xdr_error;
2649 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2650 goto xdr_error;
2651 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2652 goto xdr_error;
2653 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
2654 goto xdr_error;
2655 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
2656 goto xdr_error;
2657 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
2658 goto xdr_error;
2659 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
2660 goto xdr_error;
2661 status = verify_attr_len(xdr, savep, attrlen);
2662xdr_error:
2663 if (status != 0)
2664 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2665 return status;
2666}
2667
2668static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
2669{
2670 uint32_t *savep;
2671 uint32_t attrlen,
2672 bitmap[2] = {0};
2673 int status;
2674
2675 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2676 goto xdr_error;
2677 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2678 goto xdr_error;
2679 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2680 goto xdr_error;
2681
2682 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
2683 goto xdr_error;
2684 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
2685 goto xdr_error;
2686 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
2687 goto xdr_error;
2688 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
2689 goto xdr_error;
2690 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
2691 goto xdr_error;
2692 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
2693 goto xdr_error;
2694
2695 status = verify_attr_len(xdr, savep, attrlen);
2696xdr_error:
2697 if (status != 0)
2698 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2699 return status;
2700}
2701
2702static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
2703{
2704 uint32_t *savep;
2705 uint32_t attrlen,
2706 bitmap[2] = {0};
2707 int status;
2708
2709 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2710 goto xdr_error;
2711 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2712 goto xdr_error;
2713 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2714 goto xdr_error;
2715
2716 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
2717 goto xdr_error;
2718 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
2719 goto xdr_error;
2720
2721 status = verify_attr_len(xdr, savep, attrlen);
2722xdr_error:
2723 if (status != 0)
2724 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2725 return status;
2726}
2727
2728static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
2729{
2730 uint32_t *savep;
2731 uint32_t attrlen,
2732 bitmap[2] = {0},
2733 type;
2734 int status, fmode = 0;
2735
2736 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2737 goto xdr_error;
2738 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2739 goto xdr_error;
2740
2741 fattr->bitmap[0] = bitmap[0];
2742 fattr->bitmap[1] = bitmap[1];
2743
2744 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2745 goto xdr_error;
2746
2747
2748 if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
2749 goto xdr_error;
2750 fattr->type = nfs_type2fmt[type].nfs2type;
2751 fmode = nfs_type2fmt[type].mode;
2752
2753 if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
2754 goto xdr_error;
2755 if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
2756 goto xdr_error;
2757 if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid_u.nfs4)) != 0)
2758 goto xdr_error;
2759 if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
2760 goto xdr_error;
2761 if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
2762 goto xdr_error;
2763 fattr->mode |= fmode;
2764 if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
2765 goto xdr_error;
2766 if ((status = decode_attr_owner(xdr, bitmap, server->nfs4_state, &fattr->uid)) != 0)
2767 goto xdr_error;
2768 if ((status = decode_attr_group(xdr, bitmap, server->nfs4_state, &fattr->gid)) != 0)
2769 goto xdr_error;
2770 if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
2771 goto xdr_error;
2772 if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
2773 goto xdr_error;
2774 if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
2775 goto xdr_error;
2776 if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
2777 goto xdr_error;
2778 if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
2779 goto xdr_error;
2780 if ((status = verify_attr_len(xdr, savep, attrlen)) == 0) {
2781 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
2782 fattr->timestamp = jiffies;
2783 }
2784xdr_error:
2785 if (status != 0)
2786 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2787 return status;
2788}
2789
2790
2791static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
2792{
2793 uint32_t *savep;
2794 uint32_t attrlen, bitmap[2];
2795 int status;
2796
2797 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2798 goto xdr_error;
2799 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2800 goto xdr_error;
2801 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2802 goto xdr_error;
2803
2804 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
2805
2806 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
2807 goto xdr_error;
2808 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
2809 goto xdr_error;
2810 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
2811 goto xdr_error;
2812 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
2813 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
2814 goto xdr_error;
2815 fsinfo->wtpref = fsinfo->wtmax;
2816
2817 status = verify_attr_len(xdr, savep, attrlen);
2818xdr_error:
2819 if (status != 0)
2820 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2821 return status;
2822}
2823
2824static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
2825{
2826 uint32_t *p;
2827 uint32_t len;
2828 int status;
2829
2830 status = decode_op_hdr(xdr, OP_GETFH);
2831 if (status)
2832 return status;
2833 /* Zero handle first to allow comparisons */
2834 memset(fh, 0, sizeof(*fh));
2835
2836 READ_BUF(4);
2837 READ32(len);
2838 if (len > NFS4_FHSIZE)
2839 return -EIO;
2840 fh->size = len;
2841 READ_BUF(len);
2842 COPYMEM(fh->data, len);
2843 return 0;
2844}
2845
2846static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2847{
2848 int status;
2849
2850 status = decode_op_hdr(xdr, OP_LINK);
2851 if (status)
2852 return status;
2853 return decode_change_info(xdr, cinfo);
2854}
2855
2856/*
2857 * We create the owner, so we know a proper owner.id length is 4.
2858 */
2859static int decode_lock_denied (struct xdr_stream *xdr, struct nfs_lock_denied *denied)
2860{
2861 uint32_t *p;
2862 uint32_t namelen;
2863
2864 READ_BUF(32);
2865 READ64(denied->offset);
2866 READ64(denied->length);
2867 READ32(denied->type);
2868 READ64(denied->owner.clientid);
2869 READ32(namelen);
2870 READ_BUF(namelen);
2871 if (namelen == 4)
2872 READ32(denied->owner.id);
2873 return -NFS4ERR_DENIED;
2874}
2875
2876static int decode_lock(struct xdr_stream *xdr, struct nfs_lockres *res)
2877{
2878 uint32_t *p;
2879 int status;
2880
2881 status = decode_op_hdr(xdr, OP_LOCK);
2882 if (status == 0) {
2883 READ_BUF(sizeof(nfs4_stateid));
2884 COPYMEM(&res->u.stateid, sizeof(res->u.stateid));
2885 } else if (status == -NFS4ERR_DENIED)
2886 return decode_lock_denied(xdr, &res->u.denied);
2887 return status;
2888}
2889
2890static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockres *res)
2891{
2892 int status;
2893 status = decode_op_hdr(xdr, OP_LOCKT);
2894 if (status == -NFS4ERR_DENIED)
2895 return decode_lock_denied(xdr, &res->u.denied);
2896 return status;
2897}
2898
2899static int decode_locku(struct xdr_stream *xdr, struct nfs_lockres *res)
2900{
2901 uint32_t *p;
2902 int status;
2903
2904 status = decode_op_hdr(xdr, OP_LOCKU);
2905 if (status == 0) {
2906 READ_BUF(sizeof(nfs4_stateid));
2907 COPYMEM(&res->u.stateid, sizeof(res->u.stateid));
2908 }
2909 return status;
2910}
2911
2912static int decode_lookup(struct xdr_stream *xdr)
2913{
2914 return decode_op_hdr(xdr, OP_LOOKUP);
2915}
2916
2917/* This is too sick! */
2918static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
2919{
2920 uint32_t *p;
2921 uint32_t limit_type, nblocks, blocksize;
2922
2923 READ_BUF(12);
2924 READ32(limit_type);
2925 switch (limit_type) {
2926 case 1:
2927 READ64(*maxsize);
2928 break;
2929 case 2:
2930 READ32(nblocks);
2931 READ32(blocksize);
2932 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
2933 }
2934 return 0;
2935}
2936
2937static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
2938{
2939 uint32_t *p;
2940 uint32_t delegation_type;
2941
2942 READ_BUF(4);
2943 READ32(delegation_type);
2944 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
2945 res->delegation_type = 0;
2946 return 0;
2947 }
2948 READ_BUF(20);
2949 COPYMEM(res->delegation.data, sizeof(res->delegation.data));
2950 READ32(res->do_recall);
2951 switch (delegation_type) {
2952 case NFS4_OPEN_DELEGATE_READ:
2953 res->delegation_type = FMODE_READ;
2954 break;
2955 case NFS4_OPEN_DELEGATE_WRITE:
2956 res->delegation_type = FMODE_WRITE|FMODE_READ;
2957 if (decode_space_limit(xdr, &res->maxsize) < 0)
2958 return -EIO;
2959 }
2960 return decode_ace(xdr, NULL, res->server->nfs4_state);
2961}
2962
2963static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
2964{
2965 uint32_t *p;
2966 uint32_t bmlen;
2967 int status;
2968
2969 status = decode_op_hdr(xdr, OP_OPEN);
2970 if (status)
2971 return status;
2972 READ_BUF(sizeof(res->stateid.data));
2973 COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2974
2975 decode_change_info(xdr, &res->cinfo);
2976
2977 READ_BUF(8);
2978 READ32(res->rflags);
2979 READ32(bmlen);
2980 if (bmlen > 10)
2981 goto xdr_error;
2982
2983 READ_BUF(bmlen << 2);
2984 p += bmlen;
2985 return decode_delegation(xdr, res);
2986xdr_error:
2987 printk(KERN_NOTICE "%s: xdr error!\n", __FUNCTION__);
2988 return -EIO;
2989}
2990
2991static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
2992{
2993 uint32_t *p;
2994 int status;
2995
2996 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
2997 if (status)
2998 return status;
2999 READ_BUF(sizeof(res->stateid.data));
3000 COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3001 return 0;
3002}
3003
3004static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3005{
3006 uint32_t *p;
3007 int status;
3008
3009 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3010 if (status)
3011 return status;
3012 READ_BUF(sizeof(res->stateid.data));
3013 COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3014 return 0;
3015}
3016
3017static int decode_putfh(struct xdr_stream *xdr)
3018{
3019 return decode_op_hdr(xdr, OP_PUTFH);
3020}
3021
3022static int decode_putrootfh(struct xdr_stream *xdr)
3023{
3024 return decode_op_hdr(xdr, OP_PUTROOTFH);
3025}
3026
3027static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3028{
3029 struct kvec *iov = req->rq_rcv_buf.head;
3030 uint32_t *p;
3031 uint32_t count, eof, recvd, hdrlen;
3032 int status;
3033
3034 status = decode_op_hdr(xdr, OP_READ);
3035 if (status)
3036 return status;
3037 READ_BUF(8);
3038 READ32(eof);
3039 READ32(count);
3040 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3041 recvd = req->rq_rcv_buf.len - hdrlen;
3042 if (count > recvd) {
3043 printk(KERN_WARNING "NFS: server cheating in read reply: "
3044 "count %u > recvd %u\n", count, recvd);
3045 count = recvd;
3046 eof = 0;
3047 }
3048 xdr_read_pages(xdr, count);
3049 res->eof = eof;
3050 res->count = count;
3051 return 0;
3052}
3053
3054static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3055{
3056 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3057 struct page *page = *rcvbuf->pages;
3058 struct kvec *iov = rcvbuf->head;
3059 unsigned int nr, pglen = rcvbuf->page_len;
3060 uint32_t *end, *entry, *p, *kaddr;
3061 uint32_t len, attrlen;
3062 int hdrlen, recvd, status;
3063
3064 status = decode_op_hdr(xdr, OP_READDIR);
3065 if (status)
3066 return status;
3067 READ_BUF(8);
3068 COPYMEM(readdir->verifier.data, 8);
3069
3070 hdrlen = (char *) p - (char *) iov->iov_base;
3071 recvd = rcvbuf->len - hdrlen;
3072 if (pglen > recvd)
3073 pglen = recvd;
3074 xdr_read_pages(xdr, pglen);
3075
3076 BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3077 kaddr = p = (uint32_t *) kmap_atomic(page, KM_USER0);
3078 end = (uint32_t *) ((char *)p + pglen + readdir->pgbase);
3079 entry = p;
3080 for (nr = 0; *p++; nr++) {
3081 if (p + 3 > end)
3082 goto short_pkt;
3083 p += 2; /* cookie */
3084 len = ntohl(*p++); /* filename length */
3085 if (len > NFS4_MAXNAMLEN) {
3086 printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)\n", len);
3087 goto err_unmap;
3088 }
3089 p += XDR_QUADLEN(len);
3090 if (p + 1 > end)
3091 goto short_pkt;
3092 len = ntohl(*p++); /* bitmap length */
3093 p += len;
3094 if (p + 1 > end)
3095 goto short_pkt;
3096 attrlen = XDR_QUADLEN(ntohl(*p++));
3097 p += attrlen; /* attributes */
3098 if (p + 2 > end)
3099 goto short_pkt;
3100 entry = p;
3101 }
3102 if (!nr && (entry[0] != 0 || entry[1] == 0))
3103 goto short_pkt;
3104out:
3105 kunmap_atomic(kaddr, KM_USER0);
3106 return 0;
3107short_pkt:
3108 entry[0] = entry[1] = 0;
3109 /* truncate listing ? */
3110 if (!nr) {
3111 printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
3112 entry[1] = 1;
3113 }
3114 goto out;
3115err_unmap:
3116 kunmap_atomic(kaddr, KM_USER0);
3117 return -errno_NFSERR_IO;
3118}
3119
3120static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3121{
3122 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3123 struct kvec *iov = rcvbuf->head;
3124 int hdrlen, len, recvd;
3125 uint32_t *p;
3126 char *kaddr;
3127 int status;
3128
3129 status = decode_op_hdr(xdr, OP_READLINK);
3130 if (status)
3131 return status;
3132
3133 /* Convert length of symlink */
3134 READ_BUF(4);
3135 READ32(len);
3136 if (len >= rcvbuf->page_len || len <= 0) {
3137 dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
3138 return -ENAMETOOLONG;
3139 }
3140 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3141 recvd = req->rq_rcv_buf.len - hdrlen;
3142 if (recvd < len) {
3143 printk(KERN_WARNING "NFS: server cheating in readlink reply: "
3144 "count %u > recvd %u\n", len, recvd);
3145 return -EIO;
3146 }
3147 xdr_read_pages(xdr, len);
3148 /*
3149 * The XDR encode routine has set things up so that
3150 * the link text will be copied directly into the
3151 * buffer. We just have to do overflow-checking,
3152 * and and null-terminate the text (the VFS expects
3153 * null-termination).
3154 */
3155 kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3156 kaddr[len+rcvbuf->page_base] = '\0';
3157 kunmap_atomic(kaddr, KM_USER0);
3158 return 0;
3159}
3160
3161static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3162{
3163 int status;
3164
3165 status = decode_op_hdr(xdr, OP_REMOVE);
3166 if (status)
3167 goto out;
3168 status = decode_change_info(xdr, cinfo);
3169out:
3170 return status;
3171}
3172
3173static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3174 struct nfs4_change_info *new_cinfo)
3175{
3176 int status;
3177
3178 status = decode_op_hdr(xdr, OP_RENAME);
3179 if (status)
3180 goto out;
3181 if ((status = decode_change_info(xdr, old_cinfo)))
3182 goto out;
3183 status = decode_change_info(xdr, new_cinfo);
3184out:
3185 return status;
3186}
3187
3188static int decode_renew(struct xdr_stream *xdr)
3189{
3190 return decode_op_hdr(xdr, OP_RENEW);
3191}
3192
029d105e
BF		 3193static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3194 size_t *acl_len)
3195{
3196 uint32_t *savep;
3197 uint32_t attrlen,
3198 bitmap[2] = {0};
3199 struct kvec *iov = req->rq_rcv_buf.head;
3200 int status;
3201
3202 *acl_len = 0;
3203 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3204 goto out;
3205 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3206 goto out;
3207 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3208 goto out;
3209
3210 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3211 return -EIO;
3212 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3213 int hdrlen, recvd;
3214
3215 /* We ignore &savep and don't do consistency checks on
3216 * the attr length. Let userspace figure it out.... */
3217 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3218 recvd = req->rq_rcv_buf.len - hdrlen;
3219 if (attrlen > recvd) {
3220 printk(KERN_WARNING "NFS: server cheating in getattr"
3221 " acl reply: attrlen %u > recvd %u\n",
3222 attrlen, recvd);
3223 return -EINVAL;
3224 }
3225 if (attrlen <= *acl_len)
3226 xdr_read_pages(xdr, attrlen);
3227 *acl_len = attrlen;
3228 }
3229
3230out:
3231 return status;
3232}
3233
1da177e4
LT		 3234static int
3235decode_savefh(struct xdr_stream *xdr)
3236{
3237 return decode_op_hdr(xdr, OP_SAVEFH);
3238}
3239
3240static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3241{
3242 uint32_t *p;
3243 uint32_t bmlen;
3244 int status;
3245
3246
3247 status = decode_op_hdr(xdr, OP_SETATTR);
3248 if (status)
3249 return status;
3250 READ_BUF(4);
3251 READ32(bmlen);
3252 READ_BUF(bmlen << 2);
3253 return 0;
3254}
3255
3256static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_client *clp)
3257{
3258 uint32_t *p;
3259 uint32_t opnum;
3260 int32_t nfserr;
3261
3262 READ_BUF(8);
3263 READ32(opnum);
3264 if (opnum != OP_SETCLIENTID) {
3265 printk(KERN_NOTICE
3266 "nfs4_decode_setclientid: Server returned operation"
3267 " %d\n", opnum);
3268 return -EIO;
3269 }
3270 READ32(nfserr);
3271 if (nfserr == NFS_OK) {
3272 READ_BUF(8 + sizeof(clp->cl_confirm.data));
3273 READ64(clp->cl_clientid);
3274 COPYMEM(clp->cl_confirm.data, sizeof(clp->cl_confirm.data));
3275 } else if (nfserr == NFSERR_CLID_INUSE) {
3276 uint32_t len;
3277
3278 /* skip netid string */
3279 READ_BUF(4);
3280 READ32(len);
3281 READ_BUF(len);
3282
3283 /* skip uaddr string */
3284 READ_BUF(4);
3285 READ32(len);
3286 READ_BUF(len);
3287 return -NFSERR_CLID_INUSE;
3288 } else
3289 return -nfs_stat_to_errno(nfserr);
3290
3291 return 0;
3292}
3293
3294static int decode_setclientid_confirm(struct xdr_stream *xdr)
3295{
3296 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3297}
3298
3299static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3300{
3301 uint32_t *p;
3302 int status;
3303
3304 status = decode_op_hdr(xdr, OP_WRITE);
3305 if (status)
3306 return status;
3307
3308 READ_BUF(16);
3309 READ32(res->count);
3310 READ32(res->verf->committed);
3311 COPYMEM(res->verf->verifier, 8);
3312 return 0;
3313}
3314
3315static int decode_delegreturn(struct xdr_stream *xdr)
3316{
3317 return decode_op_hdr(xdr, OP_DELEGRETURN);
3318}
3319
3320/*
3321 * Decode OPEN_DOWNGRADE response
3322 */
3323static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3324{
3325 struct xdr_stream xdr;
3326 struct compound_hdr hdr;
3327 int status;
3328
3329 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3330 status = decode_compound_hdr(&xdr, &hdr);
3331 if (status)
3332 goto out;
3333 status = decode_putfh(&xdr);
3334 if (status)
3335 goto out;
3336 status = decode_open_downgrade(&xdr, res);
3337out:
3338 return status;
3339}
3340
3341/*
3342 * END OF "GENERIC" DECODE ROUTINES.
3343 */
3344
3345/*
3346 * Decode ACCESS response
3347 */
3348static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_accessres *res)
3349{
3350 struct xdr_stream xdr;
3351 struct compound_hdr hdr;
3352 int status;
3353
3354 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3355 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3356 goto out;
3357 if ((status = decode_putfh(&xdr)) == 0)
3358 status = decode_access(&xdr, res);
3359out:
3360 return status;
3361}
3362
3363/*
3364 * Decode LOOKUP response
3365 */
3366static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
3367{
3368 struct xdr_stream xdr;
3369 struct compound_hdr hdr;
3370 int status;
3371
3372 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3373 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3374 goto out;
3375 if ((status = decode_putfh(&xdr)) != 0)
3376 goto out;
3377 if ((status = decode_lookup(&xdr)) != 0)
3378 goto out;
3379 if ((status = decode_getfh(&xdr, res->fh)) != 0)
3380 goto out;
3381 status = decode_getfattr(&xdr, res->fattr, res->server);
3382out:
3383 return status;
3384}
3385
3386/*
3387 * Decode LOOKUP_ROOT response
3388 */
3389static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
3390{
3391 struct xdr_stream xdr;
3392 struct compound_hdr hdr;
3393 int status;
3394
3395 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3396 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3397 goto out;
3398 if ((status = decode_putrootfh(&xdr)) != 0)
3399 goto out;
3400 if ((status = decode_getfh(&xdr, res->fh)) == 0)
3401 status = decode_getfattr(&xdr, res->fattr, res->server);
3402out:
3403 return status;
3404}
3405
3406/*
3407 * Decode REMOVE response
3408 */
3409static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_change_info *cinfo)
3410{
3411 struct xdr_stream xdr;
3412 struct compound_hdr hdr;
3413 int status;
3414
3415 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3416 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3417 goto out;
3418 if ((status = decode_putfh(&xdr)) == 0)
3419 status = decode_remove(&xdr, cinfo);
3420out:
3421 return status;
3422}
3423
3424/*
3425 * Decode RENAME response
3426 */
3427static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_rename_res *res)
3428{
3429 struct xdr_stream xdr;
3430 struct compound_hdr hdr;
3431 int status;
3432
3433 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3434 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3435 goto out;
3436 if ((status = decode_putfh(&xdr)) != 0)
3437 goto out;
3438 if ((status = decode_savefh(&xdr)) != 0)
3439 goto out;
3440 if ((status = decode_putfh(&xdr)) != 0)
3441 goto out;
3442 status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo);
3443out:
3444 return status;
3445}
3446
3447/*
3448 * Decode LINK response
3449 */
3450static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_change_info *cinfo)
3451{
3452 struct xdr_stream xdr;
3453 struct compound_hdr hdr;
3454 int status;
3455
3456 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3457 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3458 goto out;
3459 if ((status = decode_putfh(&xdr)) != 0)
3460 goto out;
3461 if ((status = decode_savefh(&xdr)) != 0)
3462 goto out;
3463 if ((status = decode_putfh(&xdr)) != 0)
3464 goto out;
3465 status = decode_link(&xdr, cinfo);
3466out:
3467 return status;
3468}
3469
3470/*
3471 * Decode CREATE response
3472 */
3473static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
3474{
3475 struct xdr_stream xdr;
3476 struct compound_hdr hdr;
3477 int status;
3478
3479 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3480 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3481 goto out;
3482 if ((status = decode_putfh(&xdr)) != 0)
3483 goto out;
3484 if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3485 goto out;
3486 if ((status = decode_getfh(&xdr, res->fh)) != 0)
3487 goto out;
3488 status = decode_getfattr(&xdr, res->fattr, res->server);
3489 if (status == NFS4ERR_DELAY)
3490 status = 0;
3491out:
3492 return status;
3493}
3494
3495/*
3496 * Decode SYMLINK response
3497 */
3498static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
3499{
3500 return nfs4_xdr_dec_create(rqstp, p, res);
3501}
3502
3503/*
3504 * Decode GETATTR response
3505 */
3506static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_getattr_res *res)
3507{
3508 struct xdr_stream xdr;
3509 struct compound_hdr hdr;
3510 int status;
3511
3512 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3513 status = decode_compound_hdr(&xdr, &hdr);
3514 if (status)
3515 goto out;
3516 status = decode_putfh(&xdr);
3517 if (status)
3518 goto out;
3519 status = decode_getfattr(&xdr, res->fattr, res->server);
3520out:
3521 return status;
3522
3523}
3524
23ec6965
BF		 3525/*
3526 * Encode an SETACL request
3527 */
3528static int
3529nfs4_xdr_enc_setacl(struct rpc_rqst *req, uint32_t *p, struct nfs_setaclargs *args)
3530{
3531 struct xdr_stream xdr;
3532 struct compound_hdr hdr = {
3533 .nops = 2,
3534 };
3535 int status;
3536
3537 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
3538 encode_compound_hdr(&xdr, &hdr);
3539 status = encode_putfh(&xdr, args->fh);
3540 if (status)
3541 goto out;
3542 status = encode_setacl(&xdr, args);
3543out:
3544 return status;
3545}
3546/*
3547 * Decode SETACL response
3548 */
3549static int
3550nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, uint32_t *p, void *res)
3551{
3552 struct xdr_stream xdr;
3553 struct compound_hdr hdr;
3554 int status;
3555
3556 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3557 status = decode_compound_hdr(&xdr, &hdr);
3558 if (status)
3559 goto out;
3560 status = decode_putfh(&xdr);
3561 if (status)
3562 goto out;
3563 status = decode_setattr(&xdr, res);
3564out:
3565 return status;
3566}
1da177e4 3567
029d105e
BF		 3568/*
3569 * Decode GETACL response
3570 */
3571static int
3572nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, uint32_t *p, size_t *acl_len)
3573{
3574 struct xdr_stream xdr;
3575 struct compound_hdr hdr;
3576 int status;
3577
3578 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3579 status = decode_compound_hdr(&xdr, &hdr);
3580 if (status)
3581 goto out;
3582 status = decode_putfh(&xdr);
3583 if (status)
3584 goto out;
3585 status = decode_getacl(&xdr, rqstp, acl_len);
3586
3587out:
3588 return status;
3589}
3590
1da177e4
LT		 3591/*
3592 * Decode CLOSE response
3593 */
3594static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3595{
3596 struct xdr_stream xdr;
3597 struct compound_hdr hdr;
3598 int status;
3599
3600 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3601 status = decode_compound_hdr(&xdr, &hdr);
3602 if (status)
3603 goto out;
3604 status = decode_putfh(&xdr);
3605 if (status)
3606 goto out;
3607 status = decode_close(&xdr, res);
3608out:
3609 return status;
3610}
3611
3612/*
3613 * Decode OPEN response
3614 */
3615static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
3616{
3617 struct xdr_stream xdr;
3618 struct compound_hdr hdr;
3619 int status;
3620
3621 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3622 status = decode_compound_hdr(&xdr, &hdr);
3623 if (status)
3624 goto out;
3625 status = decode_putfh(&xdr);
3626 if (status)
3627 goto out;
3628 status = decode_open(&xdr, res);
3629 if (status)
3630 goto out;
3631 status = decode_getfh(&xdr, &res->fh);
3632 if (status)
3633 goto out;
3634 status = decode_getfattr(&xdr, res->f_attr, res->server);
3635 if (status == NFS4ERR_DELAY)
3636 status = 0;
3637out:
3638 return status;
3639}
3640
3641/*
3642 * Decode OPEN_CONFIRM response
3643 */
3644static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_open_confirmres *res)
3645{
3646 struct xdr_stream xdr;
3647 struct compound_hdr hdr;
3648 int status;
3649
3650 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3651 status = decode_compound_hdr(&xdr, &hdr);
3652 if (status)
3653 goto out;
3654 status = decode_putfh(&xdr);
3655 if (status)
3656 goto out;
3657 status = decode_open_confirm(&xdr, res);
3658out:
3659 return status;
3660}
3661
3662/*
3663 * Decode OPEN response
3664 */
3665static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
3666{
3667 struct xdr_stream xdr;
3668 struct compound_hdr hdr;
3669 int status;
3670
3671 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3672 status = decode_compound_hdr(&xdr, &hdr);
3673 if (status)
3674 goto out;
3675 status = decode_putfh(&xdr);
3676 if (status)
3677 goto out;
3678 status = decode_open(&xdr, res);
3679out:
3680 return status;
3681}
3682
3683/*
3684 * Decode SETATTR response
3685 */
3686static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_setattrres *res)
3687{
3688 struct xdr_stream xdr;
3689 struct compound_hdr hdr;
3690 int status;
3691
3692 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3693 status = decode_compound_hdr(&xdr, &hdr);
3694 if (status)
3695 goto out;
3696 status = decode_putfh(&xdr);
3697 if (status)
3698 goto out;
3699 status = decode_setattr(&xdr, res);
3700 if (status)
3701 goto out;
3702 status = decode_getfattr(&xdr, res->fattr, res->server);
3703 if (status == NFS4ERR_DELAY)
3704 status = 0;
3705out:
3706 return status;
3707}
3708
3709/*
3710 * Decode LOCK response
3711 */
3712static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
3713{
3714 struct xdr_stream xdr;
3715 struct compound_hdr hdr;
3716 int status;
3717
3718 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3719 status = decode_compound_hdr(&xdr, &hdr);
3720 if (status)
3721 goto out;
3722 status = decode_putfh(&xdr);
3723 if (status)
3724 goto out;
3725 status = decode_lock(&xdr, res);
3726out:
3727 return status;
3728}
3729
3730/*
3731 * Decode LOCKT response
3732 */
3733static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
3734{
3735 struct xdr_stream xdr;
3736 struct compound_hdr hdr;
3737 int status;
3738
3739 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3740 status = decode_compound_hdr(&xdr, &hdr);
3741 if (status)
3742 goto out;
3743 status = decode_putfh(&xdr);
3744 if (status)
3745 goto out;
3746 status = decode_lockt(&xdr, res);
3747out:
3748 return status;
3749}
3750
3751/*
3752 * Decode LOCKU response
3753 */
3754static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
3755{
3756 struct xdr_stream xdr;
3757 struct compound_hdr hdr;
3758 int status;
3759
3760 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3761 status = decode_compound_hdr(&xdr, &hdr);
3762 if (status)
3763 goto out;
3764 status = decode_putfh(&xdr);
3765 if (status)
3766 goto out;
3767 status = decode_locku(&xdr, res);
3768out:
3769 return status;
3770}
3771
3772/*
3773 * Decode READLINK response
3774 */
3775static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, uint32_t *p, void *res)
3776{
3777 struct xdr_stream xdr;
3778 struct compound_hdr hdr;
3779 int status;
3780
3781 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3782 status = decode_compound_hdr(&xdr, &hdr);
3783 if (status)
3784 goto out;
3785 status = decode_putfh(&xdr);
3786 if (status)
3787 goto out;
3788 status = decode_readlink(&xdr, rqstp);
3789out:
3790 return status;
3791}
3792
3793/*
3794 * Decode READDIR response
3795 */
3796static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_readdir_res *res)
3797{
3798 struct xdr_stream xdr;
3799 struct compound_hdr hdr;
3800 int status;
3801
3802 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3803 status = decode_compound_hdr(&xdr, &hdr);
3804 if (status)
3805 goto out;
3806 status = decode_putfh(&xdr);
3807 if (status)
3808 goto out;
3809 status = decode_readdir(&xdr, rqstp, res);
3810out:
3811 return status;
3812}
3813
3814/*
3815 * Decode Read response
3816 */
3817static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_readres *res)
3818{
3819 struct xdr_stream xdr;
3820 struct compound_hdr hdr;
3821 int status;
3822
3823 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3824 status = decode_compound_hdr(&xdr, &hdr);
3825 if (status)
3826 goto out;
3827 status = decode_putfh(&xdr);
3828 if (status)
3829 goto out;
3830 status = decode_read(&xdr, rqstp, res);
3831 if (!status)
3832 status = res->count;
3833out:
3834 return status;
3835}
3836
3837/*
3838 * Decode WRITE response
3839 */
3840static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
3841{
3842 struct xdr_stream xdr;
3843 struct compound_hdr hdr;
3844 int status;
3845
3846 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3847 status = decode_compound_hdr(&xdr, &hdr);
3848 if (status)
3849 goto out;
3850 status = decode_putfh(&xdr);
3851 if (status)
3852 goto out;
3853 status = decode_write(&xdr, res);
3854 if (!status)
3855 status = res->count;
3856out:
3857 return status;
3858}
3859
3860/*
3861 * Decode COMMIT response
3862 */
3863static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
3864{
3865 struct xdr_stream xdr;
3866 struct compound_hdr hdr;
3867 int status;
3868
3869 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3870 status = decode_compound_hdr(&xdr, &hdr);
3871 if (status)
3872 goto out;
3873 status = decode_putfh(&xdr);
3874 if (status)
3875 goto out;
3876 status = decode_commit(&xdr, res);
3877out:
3878 return status;
3879}
3880
3881/*
3882 * FSINFO request
3883 */
3884static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
3885{
3886 struct xdr_stream xdr;
3887 struct compound_hdr hdr;
3888 int status;
3889
3890 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3891 status = decode_compound_hdr(&xdr, &hdr);
3892 if (!status)
3893 status = decode_putfh(&xdr);
3894 if (!status)
3895 status = decode_fsinfo(&xdr, fsinfo);
3896 if (!status)
3897 status = -nfs_stat_to_errno(hdr.status);
3898 return status;
3899}
3900
3901/*
3902 * PATHCONF request
3903 */
3904static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, uint32_t *p, struct nfs_pathconf *pathconf)
3905{
3906 struct xdr_stream xdr;
3907 struct compound_hdr hdr;
3908 int status;
3909
3910 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3911 status = decode_compound_hdr(&xdr, &hdr);
3912 if (!status)
3913 status = decode_putfh(&xdr);
3914 if (!status)
3915 status = decode_pathconf(&xdr, pathconf);
3916 return status;
3917}
3918
3919/*
3920 * STATFS request
3921 */
3922static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, uint32_t *p, struct nfs_fsstat *fsstat)
3923{
3924 struct xdr_stream xdr;
3925 struct compound_hdr hdr;
3926 int status;
3927
3928 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3929 status = decode_compound_hdr(&xdr, &hdr);
3930 if (!status)
3931 status = decode_putfh(&xdr);
3932 if (!status)
3933 status = decode_statfs(&xdr, fsstat);
3934 return status;
3935}
3936
3937/*
3938 * GETATTR_BITMAP request
3939 */
3940static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, uint32_t *p, struct nfs4_server_caps_res *res)
3941{
3942 struct xdr_stream xdr;
3943 struct compound_hdr hdr;
3944 int status;
3945
3946 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3947 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3948 goto out;
3949 if ((status = decode_putfh(&xdr)) != 0)
3950 goto out;
3951 status = decode_server_caps(&xdr, res);
3952out:
3953 return status;
3954}
3955
3956/*
3957 * Decode RENEW response
3958 */
3959static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)
3960{
3961 struct xdr_stream xdr;
3962 struct compound_hdr hdr;
3963 int status;
3964
3965 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3966 status = decode_compound_hdr(&xdr, &hdr);
3967 if (!status)
3968 status = decode_renew(&xdr);
3969 return status;
3970}
3971
3972/*
3973 * a SETCLIENTID request
3974 */
3975static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, uint32_t *p,
3976 struct nfs4_client *clp)
3977{
3978 struct xdr_stream xdr;
3979 struct compound_hdr hdr;
3980 int status;
3981
3982 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3983 status = decode_compound_hdr(&xdr, &hdr);
3984 if (!status)
3985 status = decode_setclientid(&xdr, clp);
3986 if (!status)
3987 status = -nfs_stat_to_errno(hdr.status);
3988 return status;
3989}
3990
3991/*
3992 * a SETCLIENTID_CONFIRM request
3993 */
3994static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
3995{
3996 struct xdr_stream xdr;
3997 struct compound_hdr hdr;
3998 int status;
3999
4000 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4001 status = decode_compound_hdr(&xdr, &hdr);
4002 if (!status)
4003 status = decode_setclientid_confirm(&xdr);
4004 if (!status)
4005 status = decode_putrootfh(&xdr);
4006 if (!status)
4007 status = decode_fsinfo(&xdr, fsinfo);
4008 if (!status)
4009 status = -nfs_stat_to_errno(hdr.status);
4010 return status;
4011}
4012
4013/*
4014 * DELEGRETURN request
4015 */
4016static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)
4017{
4018 struct xdr_stream xdr;
4019 struct compound_hdr hdr;
4020 int status;
4021
4022 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4023 status = decode_compound_hdr(&xdr, &hdr);
4024 if (status == 0) {
4025 status = decode_putfh(&xdr);
4026 if (status == 0)
4027 status = decode_delegreturn(&xdr);
4028 }
4029 return status;
4030}
4031
4032uint32_t *nfs4_decode_dirent(uint32_t *p, struct nfs_entry *entry, int plus)
4033{
4034 uint32_t bitmap[2] = {0};
4035 uint32_t len;
4036
4037 if (!*p++) {
4038 if (!*p)
4039 return ERR_PTR(-EAGAIN);
4040 entry->eof = 1;
4041 return ERR_PTR(-EBADCOOKIE);
4042 }
4043
4044 entry->prev_cookie = entry->cookie;
4045 p = xdr_decode_hyper(p, &entry->cookie);
4046 entry->len = ntohl(*p++);
4047 entry->name = (const char *) p;
4048 p += XDR_QUADLEN(entry->len);
4049
4050 /*
4051 * In case the server doesn't return an inode number,
4052 * we fake one here. (We don't use inode number 0,
4053 * since glibc seems to choke on it...)
4054 */
4055 entry->ino = 1;
4056
4057 len = ntohl(*p++); /* bitmap length */
4058 if (len-- > 0) {
4059 bitmap[0] = ntohl(*p++);
4060 if (len-- > 0) {
4061 bitmap[1] = ntohl(*p++);
4062 p += len;
4063 }
4064 }
4065 len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4066 if (len > 0) {
97d312d0
MN		 4067 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4068 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4069 /* Ignore the return value of rdattr_error for now */
4070 p++;
4071 len--;
4072 }
1da177e4
LT		 4073 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4074 xdr_decode_hyper(p, &entry->ino);
4075 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4076 xdr_decode_hyper(p, &entry->ino);
4077 p += len;
4078 }
4079
4080 entry->eof = !p[0] && p[1];
4081 return p;
4082}
4083
4084/*
4085 * We need to translate between nfs status return values and
4086 * the local errno values which may not be the same.
4087 */
4088static struct {
4089 int stat;
4090 int errno;
4091} nfs_errtbl[] = {
4092 { NFS4_OK, 0 },
4093 { NFS4ERR_PERM, EPERM },
4094 { NFS4ERR_NOENT, ENOENT },
4095 { NFS4ERR_IO, errno_NFSERR_IO },
4096 { NFS4ERR_NXIO, ENXIO },
4097 { NFS4ERR_ACCESS, EACCES },
4098 { NFS4ERR_EXIST, EEXIST },
4099 { NFS4ERR_XDEV, EXDEV },
4100 { NFS4ERR_NOTDIR, ENOTDIR },
4101 { NFS4ERR_ISDIR, EISDIR },
4102 { NFS4ERR_INVAL, EINVAL },
4103 { NFS4ERR_FBIG, EFBIG },
4104 { NFS4ERR_NOSPC, ENOSPC },
4105 { NFS4ERR_ROFS, EROFS },
4106 { NFS4ERR_MLINK, EMLINK },
4107 { NFS4ERR_NAMETOOLONG, ENAMETOOLONG },
4108 { NFS4ERR_NOTEMPTY, ENOTEMPTY },
4109 { NFS4ERR_DQUOT, EDQUOT },
4110 { NFS4ERR_STALE, ESTALE },
4111 { NFS4ERR_BADHANDLE, EBADHANDLE },
6ebf3656
MN		 4112 { NFS4ERR_BADOWNER, EINVAL },
4113 { NFS4ERR_BADNAME, EINVAL },
1da177e4
LT		 4114 { NFS4ERR_BAD_COOKIE, EBADCOOKIE },
4115 { NFS4ERR_NOTSUPP, ENOTSUPP },
4116 { NFS4ERR_TOOSMALL, ETOOSMALL },
4117 { NFS4ERR_SERVERFAULT, ESERVERFAULT },
4118 { NFS4ERR_BADTYPE, EBADTYPE },
4119 { NFS4ERR_LOCKED, EAGAIN },
4120 { NFS4ERR_RESOURCE, EREMOTEIO },
4121 { NFS4ERR_SYMLINK, ELOOP },
4122 { NFS4ERR_OP_ILLEGAL, EOPNOTSUPP },
4123 { NFS4ERR_DEADLOCK, EDEADLK },
4124 { NFS4ERR_WRONGSEC, EPERM }, /* FIXME: this needs
4125 * to be handled by a
4126 * middle-layer.
4127 */
4128 { -1, EIO }
4129};
4130
4131/*
4132 * Convert an NFS error code to a local one.
4133 * This one is used jointly by NFSv2 and NFSv3.
4134 */
4135static int
4136nfs_stat_to_errno(int stat)
4137{
4138 int i;
4139 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4140 if (nfs_errtbl[i].stat == stat)
4141 return nfs_errtbl[i].errno;
4142 }
4143 if (stat <= 10000 || stat > 10100) {
4144 /* The server is looney tunes. */
4145 return ESERVERFAULT;
4146 }
4147 /* If we cannot translate the error, the recovery routines should
4148 * handle it.
4149 * Note: remaining NFSv4 error codes have values > 10000, so should
4150 * not conflict with native Linux error codes.
4151 */
4152 return stat;
4153}
4154
4155#ifndef MAX
4156# define MAX(a, b) (((a) > (b))? (a) : (b))
4157#endif
4158
4159#define PROC(proc, argtype, restype) \
4160[NFSPROC4_CLNT_##proc] = { \
4161 .p_proc = NFSPROC4_COMPOUND, \
4162 .p_encode = (kxdrproc_t) nfs4_xdr_##argtype, \
4163 .p_decode = (kxdrproc_t) nfs4_xdr_##restype, \
4164 .p_bufsiz = MAX(NFS4_##argtype##_sz,NFS4_##restype##_sz) << 2, \
4165 }
4166
4167struct rpc_procinfo nfs4_procedures[] = {
4168 PROC(READ, enc_read, dec_read),
4169 PROC(WRITE, enc_write, dec_write),
4170 PROC(COMMIT, enc_commit, dec_commit),
4171 PROC(OPEN, enc_open, dec_open),
4172 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
4173 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
4174 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
4175 PROC(CLOSE, enc_close, dec_close),
4176 PROC(SETATTR, enc_setattr, dec_setattr),
4177 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
4178 PROC(RENEW, enc_renew, dec_renew),
4179 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
4180 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
4181 PROC(LOCK, enc_lock, dec_lock),
4182 PROC(LOCKT, enc_lockt, dec_lockt),
4183 PROC(LOCKU, enc_locku, dec_locku),
4184 PROC(ACCESS, enc_access, dec_access),
4185 PROC(GETATTR, enc_getattr, dec_getattr),
4186 PROC(LOOKUP, enc_lookup, dec_lookup),
4187 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
4188 PROC(REMOVE, enc_remove, dec_remove),
4189 PROC(RENAME, enc_rename, dec_rename),
4190 PROC(LINK, enc_link, dec_link),
4191 PROC(SYMLINK, enc_symlink, dec_symlink),
4192 PROC(CREATE, enc_create, dec_create),
4193 PROC(PATHCONF, enc_pathconf, dec_pathconf),
4194 PROC(STATFS, enc_statfs, dec_statfs),
4195 PROC(READLINK, enc_readlink, dec_readlink),
4196 PROC(READDIR, enc_readdir, dec_readdir),
4197 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
4198 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
029d105e 4199 PROC(GETACL, enc_getacl, dec_getacl),
23ec6965 4200 PROC(SETACL, enc_setacl, dec_setacl),
1da177e4
LT		 4201};
4202
4203struct rpc_version nfs_version4 = {
4204 .number = 4,
4205 .nrprocs = sizeof(nfs4_procedures)/sizeof(nfs4_procedures[0]),
4206 .procs = nfs4_procedures
4207};
4208
4209/*
4210 * Local variables:
4211 * c-basic-offset: 8
4212 * End:
4213 */
Linux 6.x block layer and io_uring tree(s)