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[PATCH] NFSv4: Client-side xdr for writing NFSv4 acls
[linux-2.6-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;
1017 int replen;
1018 uint32_t *p;
1019
1020 RESERVE_SPACE(32+sizeof(nfs4_verifier));
1021 WRITE32(OP_READDIR);
1022 WRITE64(readdir->cookie);
1023 WRITEMEM(readdir->verifier.data, sizeof(readdir->verifier.data));
1024 WRITE32(readdir->count >> 1); /* We're not doing readdirplus */
1025 WRITE32(readdir->count);
1026 WRITE32(2);
1027 if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1028 WRITE32(0);
1029 WRITE32(FATTR4_WORD1_MOUNTED_ON_FILEID);
1030 } else {
1031 WRITE32(FATTR4_WORD0_FILEID);
1032 WRITE32(0);
1033 }
1034
1035 /* set up reply kvec
1036 * toplevel_status + taglen + rescount + OP_PUTFH + status
1037 * + OP_READDIR + status + verifer(2) = 9
1038 */
1039 replen = (RPC_REPHDRSIZE + auth->au_rslack + 9) << 2;
1040 xdr_inline_pages(&req->rq_rcv_buf, replen, readdir->pages,
1041 readdir->pgbase, readdir->count);
1042
1043 return 0;
1044}
1045
1046static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
1047{
1048 struct rpc_auth *auth = req->rq_task->tk_auth;
1049 unsigned int replen;
1050 uint32_t *p;
1051
1052 RESERVE_SPACE(4);
1053 WRITE32(OP_READLINK);
1054
1055 /* set up reply kvec
1056 * toplevel_status + taglen + rescount + OP_PUTFH + status
1057 * + OP_READLINK + status + string length = 8
1058 */
1059 replen = (RPC_REPHDRSIZE + auth->au_rslack + 8) << 2;
1060 xdr_inline_pages(&req->rq_rcv_buf, replen, readlink->pages,
1061 readlink->pgbase, readlink->pglen);
1062
1063 return 0;
1064}
1065
1066static int encode_remove(struct xdr_stream *xdr, const struct qstr *name)
1067{
1068 uint32_t *p;
1069
1070 RESERVE_SPACE(8 + name->len);
1071 WRITE32(OP_REMOVE);
1072 WRITE32(name->len);
1073 WRITEMEM(name->name, name->len);
1074
1075 return 0;
1076}
1077
1078static int encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname)
1079{
1080 uint32_t *p;
1081
1082 RESERVE_SPACE(8 + oldname->len);
1083 WRITE32(OP_RENAME);
1084 WRITE32(oldname->len);
1085 WRITEMEM(oldname->name, oldname->len);
1086
1087 RESERVE_SPACE(4 + newname->len);
1088 WRITE32(newname->len);
1089 WRITEMEM(newname->name, newname->len);
1090
1091 return 0;
1092}
1093
1094static int encode_renew(struct xdr_stream *xdr, const struct nfs4_client *client_stateid)
1095{
1096 uint32_t *p;
1097
1098 RESERVE_SPACE(12);
1099 WRITE32(OP_RENEW);
1100 WRITE64(client_stateid->cl_clientid);
1101
1102 return 0;
1103}
1104
23ec6965
BF		 1105static int
1106encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg)
1107{
1108 uint32_t *p;
1109
1110 RESERVE_SPACE(4+sizeof(zero_stateid.data));
1111 WRITE32(OP_SETATTR);
1112 WRITEMEM(zero_stateid.data, sizeof(zero_stateid.data));
1113 RESERVE_SPACE(2*4);
1114 WRITE32(1);
1115 WRITE32(FATTR4_WORD0_ACL);
1116 if (arg->acl_len % 4)
1117 return -EINVAL;
1118 RESERVE_SPACE(4);
1119 WRITE32(arg->acl_len);
1120 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1121 return 0;
1122}
1123
1da177e4
LT		 1124static int
1125encode_savefh(struct xdr_stream *xdr)
1126{
1127 uint32_t *p;
1128
1129 RESERVE_SPACE(4);
1130 WRITE32(OP_SAVEFH);
1131
1132 return 0;
1133}
1134
1135static int encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server)
1136{
1137 int status;
1138 uint32_t *p;
1139
1140 RESERVE_SPACE(4+sizeof(arg->stateid.data));
1141 WRITE32(OP_SETATTR);
1142 WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
1143
1144 if ((status = encode_attrs(xdr, arg->iap, server)))
1145 return status;
1146
1147 return 0;
1148}
1149
1150static int encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid)
1151{
1152 uint32_t *p;
1153
1154 RESERVE_SPACE(4 + sizeof(setclientid->sc_verifier->data));
1155 WRITE32(OP_SETCLIENTID);
1156 WRITEMEM(setclientid->sc_verifier->data, sizeof(setclientid->sc_verifier->data));
1157
1158 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1159 RESERVE_SPACE(4);
1160 WRITE32(setclientid->sc_prog);
1161 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1162 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1163 RESERVE_SPACE(4);
1164 WRITE32(setclientid->sc_cb_ident);
1165
1166 return 0;
1167}
1168
1169static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_client *client_state)
1170{
1171 uint32_t *p;
1172
1173 RESERVE_SPACE(12 + sizeof(client_state->cl_confirm.data));
1174 WRITE32(OP_SETCLIENTID_CONFIRM);
1175 WRITE64(client_state->cl_clientid);
1176 WRITEMEM(client_state->cl_confirm.data, sizeof(client_state->cl_confirm.data));
1177
1178 return 0;
1179}
1180
1181static int encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args)
1182{
1183 uint32_t *p;
1184
1185 RESERVE_SPACE(4);
1186 WRITE32(OP_WRITE);
1187
1188 encode_stateid(xdr, args->context);
1189
1190 RESERVE_SPACE(16);
1191 WRITE64(args->offset);
1192 WRITE32(args->stable);
1193 WRITE32(args->count);
1194
1195 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1196
1197 return 0;
1198}
1199
1200static int encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1201{
1202 uint32_t *p;
1203
1204 RESERVE_SPACE(20);
1205
1206 WRITE32(OP_DELEGRETURN);
1207 WRITEMEM(stateid->data, sizeof(stateid->data));
1208 return 0;
1209
1210}
1211/*
1212 * END OF "GENERIC" ENCODE ROUTINES.
1213 */
1214
1215/*
1216 * Encode an ACCESS request
1217 */
1218static int nfs4_xdr_enc_access(struct rpc_rqst *req, uint32_t *p, const struct nfs4_accessargs *args)
1219{
1220 struct xdr_stream xdr;
1221 struct compound_hdr hdr = {
1222 .nops = 2,
1223 };
1224 int status;
1225
1226 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1227 encode_compound_hdr(&xdr, &hdr);
1228 if ((status = encode_putfh(&xdr, args->fh)) == 0)
1229 status = encode_access(&xdr, args->access);
1230 return status;
1231}
1232
1233/*
1234 * Encode LOOKUP request
1235 */
1236static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, uint32_t *p, const struct nfs4_lookup_arg *args)
1237{
1238 struct xdr_stream xdr;
1239 struct compound_hdr hdr = {
1240 .nops = 4,
1241 };
1242 int status;
1243
1244 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1245 encode_compound_hdr(&xdr, &hdr);
1246 if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1247 goto out;
1248 if ((status = encode_lookup(&xdr, args->name)) != 0)
1249 goto out;
1250 if ((status = encode_getfh(&xdr)) != 0)
1251 goto out;
1252 status = encode_getfattr(&xdr, args->bitmask);
1253out:
1254 return status;
1255}
1256
1257/*
1258 * Encode LOOKUP_ROOT request
1259 */
1260static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, uint32_t *p, const struct nfs4_lookup_root_arg *args)
1261{
1262 struct xdr_stream xdr;
1263 struct compound_hdr hdr = {
1264 .nops = 3,
1265 };
1266 int status;
1267
1268 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1269 encode_compound_hdr(&xdr, &hdr);
1270 if ((status = encode_putrootfh(&xdr)) != 0)
1271 goto out;
1272 if ((status = encode_getfh(&xdr)) == 0)
1273 status = encode_getfattr(&xdr, args->bitmask);
1274out:
1275 return status;
1276}
1277
1278/*
1279 * Encode REMOVE request
1280 */
1281static int nfs4_xdr_enc_remove(struct rpc_rqst *req, uint32_t *p, const struct nfs4_remove_arg *args)
1282{
1283 struct xdr_stream xdr;
1284 struct compound_hdr hdr = {
1285 .nops = 2,
1286 };
1287 int status;
1288
1289 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1290 encode_compound_hdr(&xdr, &hdr);
1291 if ((status = encode_putfh(&xdr, args->fh)) == 0)
1292 status = encode_remove(&xdr, args->name);
1293 return status;
1294}
1295
1296/*
1297 * Encode RENAME request
1298 */
1299static int nfs4_xdr_enc_rename(struct rpc_rqst *req, uint32_t *p, const struct nfs4_rename_arg *args)
1300{
1301 struct xdr_stream xdr;
1302 struct compound_hdr hdr = {
1303 .nops = 4,
1304 };
1305 int status;
1306
1307 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1308 encode_compound_hdr(&xdr, &hdr);
1309 if ((status = encode_putfh(&xdr, args->old_dir)) != 0)
1310 goto out;
1311 if ((status = encode_savefh(&xdr)) != 0)
1312 goto out;
1313 if ((status = encode_putfh(&xdr, args->new_dir)) != 0)
1314 goto out;
1315 status = encode_rename(&xdr, args->old_name, args->new_name);
1316out:
1317 return status;
1318}
1319
1320/*
1321 * Encode LINK request
1322 */
1323static int nfs4_xdr_enc_link(struct rpc_rqst *req, uint32_t *p, const struct nfs4_link_arg *args)
1324{
1325 struct xdr_stream xdr;
1326 struct compound_hdr hdr = {
1327 .nops = 4,
1328 };
1329 int status;
1330
1331 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1332 encode_compound_hdr(&xdr, &hdr);
1333 if ((status = encode_putfh(&xdr, args->fh)) != 0)
1334 goto out;
1335 if ((status = encode_savefh(&xdr)) != 0)
1336 goto out;
1337 if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1338 goto out;
1339 status = encode_link(&xdr, args->name);
1340out:
1341 return status;
1342}
1343
1344/*
1345 * Encode CREATE request
1346 */
1347static int nfs4_xdr_enc_create(struct rpc_rqst *req, uint32_t *p, const struct nfs4_create_arg *args)
1348{
1349 struct xdr_stream xdr;
1350 struct compound_hdr hdr = {
1351 .nops = 4,
1352 };
1353 int status;
1354
1355 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1356 encode_compound_hdr(&xdr, &hdr);
1357 if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1358 goto out;
1359 if ((status = encode_create(&xdr, args)) != 0)
1360 goto out;
1361 if ((status = encode_getfh(&xdr)) != 0)
1362 goto out;
1363 status = encode_getfattr(&xdr, args->bitmask);
1364out:
1365 return status;
1366}
1367
1368/*
1369 * Encode SYMLINK request
1370 */
1371static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, uint32_t *p, const struct nfs4_create_arg *args)
1372{
1373 return nfs4_xdr_enc_create(req, p, args);
1374}
1375
1376/*
1377 * Encode GETATTR request
1378 */
1379static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, uint32_t *p, const struct nfs4_getattr_arg *args)
1380{
1381 struct xdr_stream xdr;
1382 struct compound_hdr hdr = {
1383 .nops = 2,
1384 };
1385 int status;
1386
1387 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1388 encode_compound_hdr(&xdr, &hdr);
1389 if ((status = encode_putfh(&xdr, args->fh)) == 0)
1390 status = encode_getfattr(&xdr, args->bitmask);
1391 return status;
1392}
1393
1394/*
1395 * Encode a CLOSE request
1396 */
1397static int nfs4_xdr_enc_close(struct rpc_rqst *req, uint32_t *p, struct nfs_closeargs *args)
1398{
1399 struct xdr_stream xdr;
1400 struct compound_hdr hdr = {
1401 .nops = 2,
1402 };
1403 int status;
1404
1405 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1406 encode_compound_hdr(&xdr, &hdr);
1407 status = encode_putfh(&xdr, args->fh);
1408 if(status)
1409 goto out;
1410 status = encode_close(&xdr, args);
1411out:
1412 return status;
1413}
1414
1415/*
1416 * Encode an OPEN request
1417 */
1418static int nfs4_xdr_enc_open(struct rpc_rqst *req, uint32_t *p, struct nfs_openargs *args)
1419{
1420 struct xdr_stream xdr;
1421 struct compound_hdr hdr = {
1422 .nops = 4,
1423 };
1424 int status;
1425
1426 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1427 encode_compound_hdr(&xdr, &hdr);
1428 status = encode_putfh(&xdr, args->fh);
1429 if (status)
1430 goto out;
1431 status = encode_open(&xdr, args);
1432 if (status)
1433 goto out;
1434 status = encode_getfh(&xdr);
1435 if (status)
1436 goto out;
1437 status = encode_getfattr(&xdr, args->bitmask);
1438out:
1439 return status;
1440}
1441
1442/*
1443 * Encode an OPEN_CONFIRM request
1444 */
1445static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_open_confirmargs *args)
1446{
1447 struct xdr_stream xdr;
1448 struct compound_hdr hdr = {
1449 .nops = 2,
1450 };
1451 int status;
1452
1453 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1454 encode_compound_hdr(&xdr, &hdr);
1455 status = encode_putfh(&xdr, args->fh);
1456 if(status)
1457 goto out;
1458 status = encode_open_confirm(&xdr, args);
1459out:
1460 return status;
1461}
1462
1463/*
1464 * Encode an OPEN request with no attributes.
1465 */
1466static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, uint32_t *p, struct nfs_openargs *args)
1467{
1468 struct xdr_stream xdr;
1469 struct compound_hdr hdr = {
1470 .nops = 2,
1471 };
1472 int status;
1473
1474 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1475 encode_compound_hdr(&xdr, &hdr);
1476 status = encode_putfh(&xdr, args->fh);
1477 if (status)
1478 goto out;
1479 status = encode_open(&xdr, args);
1480out:
1481 return status;
1482}
1483
1484/*
1485 * Encode an OPEN_DOWNGRADE request
1486 */
1487static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, uint32_t *p, struct nfs_closeargs *args)
1488{
1489 struct xdr_stream xdr;
1490 struct compound_hdr hdr = {
1491 .nops = 2,
1492 };
1493 int status;
1494
1495 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1496 encode_compound_hdr(&xdr, &hdr);
1497 status = encode_putfh(&xdr, args->fh);
1498 if (status)
1499 goto out;
1500 status = encode_open_downgrade(&xdr, args);
1501out:
1502 return status;
1503}
1504
1505/*
1506 * Encode a LOCK request
1507 */
1508static int nfs4_xdr_enc_lock(struct rpc_rqst *req, uint32_t *p, struct nfs_lockargs *args)
1509{
1510 struct xdr_stream xdr;
1511 struct compound_hdr hdr = {
1512 .nops = 2,
1513 };
1514 int status;
1515
1516 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1517 encode_compound_hdr(&xdr, &hdr);
1518 status = encode_putfh(&xdr, args->fh);
1519 if(status)
1520 goto out;
1521 status = encode_lock(&xdr, args);
1522out:
1523 return status;
1524}
1525
1526/*
1527 * Encode a LOCKT request
1528 */
1529static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, uint32_t *p, struct nfs_lockargs *args)
1530{
1531 struct xdr_stream xdr;
1532 struct compound_hdr hdr = {
1533 .nops = 2,
1534 };
1535 int status;
1536
1537 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1538 encode_compound_hdr(&xdr, &hdr);
1539 status = encode_putfh(&xdr, args->fh);
1540 if(status)
1541 goto out;
1542 status = encode_lockt(&xdr, args);
1543out:
1544 return status;
1545}
1546
1547/*
1548 * Encode a LOCKU request
1549 */
1550static int nfs4_xdr_enc_locku(struct rpc_rqst *req, uint32_t *p, struct nfs_lockargs *args)
1551{
1552 struct xdr_stream xdr;
1553 struct compound_hdr hdr = {
1554 .nops = 2,
1555 };
1556 int status;
1557
1558 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1559 encode_compound_hdr(&xdr, &hdr);
1560 status = encode_putfh(&xdr, args->fh);
1561 if(status)
1562 goto out;
1563 status = encode_locku(&xdr, args);
1564out:
1565 return status;
1566}
1567
1568/*
1569 * Encode a READLINK request
1570 */
1571static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, uint32_t *p, const struct nfs4_readlink *args)
1572{
1573 struct xdr_stream xdr;
1574 struct compound_hdr hdr = {
1575 .nops = 2,
1576 };
1577 int status;
1578
1579 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1580 encode_compound_hdr(&xdr, &hdr);
1581 status = encode_putfh(&xdr, args->fh);
1582 if(status)
1583 goto out;
1584 status = encode_readlink(&xdr, args, req);
1585out:
1586 return status;
1587}
1588
1589/*
1590 * Encode a READDIR request
1591 */
1592static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, uint32_t *p, const struct nfs4_readdir_arg *args)
1593{
1594 struct xdr_stream xdr;
1595 struct compound_hdr hdr = {
1596 .nops = 2,
1597 };
1598 int status;
1599
1600 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1601 encode_compound_hdr(&xdr, &hdr);
1602 status = encode_putfh(&xdr, args->fh);
1603 if(status)
1604 goto out;
1605 status = encode_readdir(&xdr, args, req);
1606out:
1607 return status;
1608}
1609
1610/*
1611 * Encode a READ request
1612 */
1613static int nfs4_xdr_enc_read(struct rpc_rqst *req, uint32_t *p, struct nfs_readargs *args)
1614{
1615 struct rpc_auth *auth = req->rq_task->tk_auth;
1616 struct xdr_stream xdr;
1617 struct compound_hdr hdr = {
1618 .nops = 2,
1619 };
1620 int replen, status;
1621
1622 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1623 encode_compound_hdr(&xdr, &hdr);
1624 status = encode_putfh(&xdr, args->fh);
1625 if (status)
1626 goto out;
1627 status = encode_read(&xdr, args);
1628 if (status)
1629 goto out;
1630
1631 /* set up reply kvec
1632 * toplevel status + taglen=0 + rescount + OP_PUTFH + status
1633 * + OP_READ + status + eof + datalen = 9
1634 */
1635 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1636 xdr_inline_pages(&req->rq_rcv_buf, replen,
1637 args->pages, args->pgbase, args->count);
1638out:
1639 return status;
1640}
1641
1642/*
1643 * Encode an SETATTR request
1644 */
1645static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, uint32_t *p, struct nfs_setattrargs *args)
1646
1647{
1648 struct xdr_stream xdr;
1649 struct compound_hdr hdr = {
1650 .nops = 3,
1651 };
1652 int status;
1653
1654 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1655 encode_compound_hdr(&xdr, &hdr);
1656 status = encode_putfh(&xdr, args->fh);
1657 if(status)
1658 goto out;
1659 status = encode_setattr(&xdr, args, args->server);
1660 if(status)
1661 goto out;
1662 status = encode_getfattr(&xdr, args->bitmask);
1663out:
1664 return status;
1665}
1666
029d105e
BF		 1667/*
1668 * Encode a GETACL request
1669 */
1670static int
1671nfs4_xdr_enc_getacl(struct rpc_rqst *req, uint32_t *p,
1672 struct nfs_getaclargs *args)
1673{
1674 struct xdr_stream xdr;
1675 struct rpc_auth *auth = req->rq_task->tk_auth;
1676 struct compound_hdr hdr = {
1677 .nops = 2,
1678 };
1679 int replen, status;
1680
1681 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1682 encode_compound_hdr(&xdr, &hdr);
1683 status = encode_putfh(&xdr, args->fh);
1684 if (status)
1685 goto out;
1686 status = encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0);
1687 /* set up reply buffer: */
1688 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1689 xdr_inline_pages(&req->rq_rcv_buf, replen,
1690 args->acl_pages, args->acl_pgbase, args->acl_len);
1691out:
1692 return status;
1693}
1694
1da177e4
LT		 1695/*
1696 * Encode a WRITE request
1697 */
1698static int nfs4_xdr_enc_write(struct rpc_rqst *req, uint32_t *p, struct nfs_writeargs *args)
1699{
1700 struct xdr_stream xdr;
1701 struct compound_hdr hdr = {
1702 .nops = 2,
1703 };
1704 int status;
1705
1706 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1707 encode_compound_hdr(&xdr, &hdr);
1708 status = encode_putfh(&xdr, args->fh);
1709 if (status)
1710 goto out;
1711 status = encode_write(&xdr, args);
1712out:
1713 return status;
1714}
1715
1716/*
1717 * a COMMIT request
1718 */
1719static int nfs4_xdr_enc_commit(struct rpc_rqst *req, uint32_t *p, struct nfs_writeargs *args)
1720{
1721 struct xdr_stream xdr;
1722 struct compound_hdr hdr = {
1723 .nops = 2,
1724 };
1725 int status;
1726
1727 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1728 encode_compound_hdr(&xdr, &hdr);
1729 status = encode_putfh(&xdr, args->fh);
1730 if (status)
1731 goto out;
1732 status = encode_commit(&xdr, args);
1733out:
1734 return status;
1735}
1736
1737/*
1738 * FSINFO request
1739 */
1740static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs4_fsinfo_arg *args)
1741{
1742 struct xdr_stream xdr;
1743 struct compound_hdr hdr = {
1744 .nops = 2,
1745 };
1746 int status;
1747
1748 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1749 encode_compound_hdr(&xdr, &hdr);
1750 status = encode_putfh(&xdr, args->fh);
1751 if (!status)
1752 status = encode_fsinfo(&xdr, args->bitmask);
1753 return status;
1754}
1755
1756/*
1757 * a PATHCONF request
1758 */
1759static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, uint32_t *p, const struct nfs4_pathconf_arg *args)
1760{
1da177e4
LT		 1761 struct xdr_stream xdr;
1762 struct compound_hdr hdr = {
1763 .nops = 2,
1764 };
1765 int status;
1766
1767 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1768 encode_compound_hdr(&xdr, &hdr);
1769 status = encode_putfh(&xdr, args->fh);
1770 if (!status)
1771 status = encode_getattr_one(&xdr,
1772 args->bitmask[0] & nfs4_pathconf_bitmap[0]);
1773 return status;
1774}
1775
1776/*
1777 * a STATFS request
1778 */
1779static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, uint32_t *p, const struct nfs4_statfs_arg *args)
1780{
1da177e4
LT		 1781 struct xdr_stream xdr;
1782 struct compound_hdr hdr = {
1783 .nops = 2,
1784 };
1785 int status;
1786
1787 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1788 encode_compound_hdr(&xdr, &hdr);
1789 status = encode_putfh(&xdr, args->fh);
1790 if (status == 0)
1791 status = encode_getattr_two(&xdr,
1792 args->bitmask[0] & nfs4_statfs_bitmap[0],
1793 args->bitmask[1] & nfs4_statfs_bitmap[1]);
1794 return status;
1795}
1796
1797/*
1798 * GETATTR_BITMAP request
1799 */
1800static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, uint32_t *p, const struct nfs_fh *fhandle)
1801{
1802 struct xdr_stream xdr;
1803 struct compound_hdr hdr = {
1804 .nops = 2,
1805 };
1806 int status;
1807
1808 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1809 encode_compound_hdr(&xdr, &hdr);
1810 status = encode_putfh(&xdr, fhandle);
1811 if (status == 0)
1812 status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
1813 FATTR4_WORD0_LINK_SUPPORT|
1814 FATTR4_WORD0_SYMLINK_SUPPORT|
1815 FATTR4_WORD0_ACLSUPPORT);
1816 return status;
1817}
1818
1819/*
1820 * a RENEW request
1821 */
1822static int nfs4_xdr_enc_renew(struct rpc_rqst *req, uint32_t *p, struct nfs4_client *clp)
1823{
1824 struct xdr_stream xdr;
1825 struct compound_hdr hdr = {
1826 .nops = 1,
1827 };
1828
1829 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1830 encode_compound_hdr(&xdr, &hdr);
1831 return encode_renew(&xdr, clp);
1832}
1833
1834/*
1835 * a SETCLIENTID request
1836 */
1837static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, uint32_t *p, struct nfs4_setclientid *sc)
1838{
1839 struct xdr_stream xdr;
1840 struct compound_hdr hdr = {
1841 .nops = 1,
1842 };
1843
1844 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1845 encode_compound_hdr(&xdr, &hdr);
1846 return encode_setclientid(&xdr, sc);
1847}
1848
1849/*
1850 * a SETCLIENTID_CONFIRM request
1851 */
1852static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs4_client *clp)
1853{
1854 struct xdr_stream xdr;
1855 struct compound_hdr hdr = {
1856 .nops = 3,
1857 };
1858 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
1859 int status;
1860
1861 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1862 encode_compound_hdr(&xdr, &hdr);
1863 status = encode_setclientid_confirm(&xdr, clp);
1864 if (!status)
1865 status = encode_putrootfh(&xdr);
1866 if (!status)
1867 status = encode_fsinfo(&xdr, lease_bitmap);
1868 return status;
1869}
1870
1871/*
1872 * DELEGRETURN request
1873 */
1874static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, uint32_t *p, const struct nfs4_delegreturnargs *args)
1875{
1876 struct xdr_stream xdr;
1877 struct compound_hdr hdr = {
1878 .nops = 2,
1879 };
1880 int status;
1881
1882 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1883 encode_compound_hdr(&xdr, &hdr);
1884 if ((status = encode_putfh(&xdr, args->fhandle)) == 0)
1885 status = encode_delegreturn(&xdr, args->stateid);
1886 return status;
1887}
1888
1889/*
1890 * START OF "GENERIC" DECODE ROUTINES.
1891 * These may look a little ugly since they are imported from a "generic"
1892 * set of XDR encode/decode routines which are intended to be shared by
1893 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1894 *
1895 * If the pain of reading these is too great, it should be a straightforward
1896 * task to translate them into Linux-specific versions which are more
1897 * consistent with the style used in NFSv2/v3...
1898 */
1899#define READ32(x) (x) = ntohl(*p++)
1900#define READ64(x) do { \
1901 (x) = (u64)ntohl(*p++) << 32; \
1902 (x) |= ntohl(*p++); \
1903} while (0)
1904#define READTIME(x) do { \
1905 p++; \
1906 (x.tv_sec) = ntohl(*p++); \
1907 (x.tv_nsec) = ntohl(*p++); \
1908} while (0)
1909#define COPYMEM(x,nbytes) do { \
1910 memcpy((x), p, nbytes); \
1911 p += XDR_QUADLEN(nbytes); \
1912} while (0)
1913
1914#define READ_BUF(nbytes) do { \
1915 p = xdr_inline_decode(xdr, nbytes); \
1916 if (!p) { \
1917 printk(KERN_WARNING "%s: reply buffer overflowed in line %d.", \
1918 __FUNCTION__, __LINE__); \
1919 return -EIO; \
1920 } \
1921} while (0)
1922
1923static int decode_opaque_inline(struct xdr_stream *xdr, uint32_t *len, char **string)
1924{
1925 uint32_t *p;
1926
1927 READ_BUF(4);
1928 READ32(*len);
1929 READ_BUF(*len);
1930 *string = (char *)p;
1931 return 0;
1932}
1933
1934static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
1935{
1936 uint32_t *p;
1937
1938 READ_BUF(8);
1939 READ32(hdr->status);
1940 READ32(hdr->taglen);
1941
1942 READ_BUF(hdr->taglen + 4);
1943 hdr->tag = (char *)p;
1944 p += XDR_QUADLEN(hdr->taglen);
1945 READ32(hdr->nops);
1946 return 0;
1947}
1948
1949static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
1950{
1951 uint32_t *p;
1952 uint32_t opnum;
1953 int32_t nfserr;
1954
1955 READ_BUF(8);
1956 READ32(opnum);
1957 if (opnum != expected) {
1958 printk(KERN_NOTICE
1959 "nfs4_decode_op_hdr: Server returned operation"
1960 " %d but we issued a request for %d\n",
1961 opnum, expected);
1962 return -EIO;
1963 }
1964 READ32(nfserr);
1965 if (nfserr != NFS_OK)
1966 return -nfs_stat_to_errno(nfserr);
1967 return 0;
1968}
1969
1970/* Dummy routine */
1971static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs4_client *clp)
1972{
1973 uint32_t *p;
1974 uint32_t strlen;
1975 char *str;
1976
1977 READ_BUF(12);
1978 return decode_opaque_inline(xdr, &strlen, &str);
1979}
1980
1981static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
1982{
1983 uint32_t bmlen, *p;
1984
1985 READ_BUF(4);
1986 READ32(bmlen);
1987
1988 bitmap[0] = bitmap[1] = 0;
1989 READ_BUF((bmlen << 2));
1990 if (bmlen > 0) {
1991 READ32(bitmap[0]);
1992 if (bmlen > 1)
1993 READ32(bitmap[1]);
1994 }
1995 return 0;
1996}
1997
1998static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, uint32_t **savep)
1999{
2000 uint32_t *p;
2001
2002 READ_BUF(4);
2003 READ32(*attrlen);
2004 *savep = xdr->p;
2005 return 0;
2006}
2007
2008static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2009{
2010 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2011 decode_attr_bitmap(xdr, bitmask);
2012 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2013 } else
2014 bitmask[0] = bitmask[1] = 0;
2015 dprintk("%s: bitmask=0x%x%x\n", __FUNCTION__, bitmask[0], bitmask[1]);
2016 return 0;
2017}
2018
2019static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2020{
2021 uint32_t *p;
2022
2023 *type = 0;
2024 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2025 return -EIO;
2026 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2027 READ_BUF(4);
2028 READ32(*type);
2029 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2030 dprintk("%s: bad type %d\n", __FUNCTION__, *type);
2031 return -EIO;
2032 }
2033 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2034 }
2035 dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
2036 return 0;
2037}
2038
2039static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2040{
2041 uint32_t *p;
2042
2043 *change = 0;
2044 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2045 return -EIO;
2046 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2047 READ_BUF(8);
2048 READ64(*change);
2049 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2050 }
2051 dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
2052 (unsigned long long)*change);
2053 return 0;
2054}
2055
2056static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2057{
2058 uint32_t *p;
2059
2060 *size = 0;
2061 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2062 return -EIO;
2063 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2064 READ_BUF(8);
2065 READ64(*size);
2066 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2067 }
2068 dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
2069 return 0;
2070}
2071
2072static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2073{
2074 uint32_t *p;
2075
2076 *res = 0;
2077 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2078 return -EIO;
2079 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2080 READ_BUF(4);
2081 READ32(*res);
2082 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2083 }
2084 dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2085 return 0;
2086}
2087
2088static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2089{
2090 uint32_t *p;
2091
2092 *res = 0;
2093 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2094 return -EIO;
2095 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2096 READ_BUF(4);
2097 READ32(*res);
2098 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2099 }
2100 dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2101 return 0;
2102}
2103
2104static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fsid *fsid)
2105{
2106 uint32_t *p;
2107
2108 fsid->major = 0;
2109 fsid->minor = 0;
2110 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2111 return -EIO;
2112 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2113 READ_BUF(16);
2114 READ64(fsid->major);
2115 READ64(fsid->minor);
2116 bitmap[0] &= ~FATTR4_WORD0_FSID;
2117 }
2118 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
2119 (unsigned long long)fsid->major,
2120 (unsigned long long)fsid->minor);
2121 return 0;
2122}
2123
2124static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2125{
2126 uint32_t *p;
2127
2128 *res = 60;
2129 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2130 return -EIO;
2131 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2132 READ_BUF(4);
2133 READ32(*res);
2134 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2135 }
2136 dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
2137 return 0;
2138}
2139
2140static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2141{
2142 uint32_t *p;
2143
2144 *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2145 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2146 return -EIO;
2147 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2148 READ_BUF(4);
2149 READ32(*res);
2150 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2151 }
2152 dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
2153 return 0;
2154}
2155
2156static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2157{
2158 uint32_t *p;
2159
2160 *fileid = 0;
2161 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2162 return -EIO;
2163 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2164 READ_BUF(8);
2165 READ64(*fileid);
2166 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2167 }
2168 dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2169 return 0;
2170}
2171
2172static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2173{
2174 uint32_t *p;
2175 int status = 0;
2176
2177 *res = 0;
2178 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2179 return -EIO;
2180 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2181 READ_BUF(8);
2182 READ64(*res);
2183 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2184 }
2185 dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2186 return status;
2187}
2188
2189static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2190{
2191 uint32_t *p;
2192 int status = 0;
2193
2194 *res = 0;
2195 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2196 return -EIO;
2197 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2198 READ_BUF(8);
2199 READ64(*res);
2200 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2201 }
2202 dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2203 return status;
2204}
2205
2206static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2207{
2208 uint32_t *p;
2209 int status = 0;
2210
2211 *res = 0;
2212 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2213 return -EIO;
2214 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2215 READ_BUF(8);
2216 READ64(*res);
2217 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2218 }
2219 dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2220 return status;
2221}
2222
2223static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2224{
2225 uint32_t *p;
2226 int status = 0;
2227
2228 *res = 0;
2229 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2230 return -EIO;
2231 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2232 READ_BUF(8);
2233 READ64(*res);
2234 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2235 }
2236 dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2237 return status;
2238}
2239
2240static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2241{
2242 uint32_t *p;
2243 int status = 0;
2244
2245 *maxlink = 1;
2246 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2247 return -EIO;
2248 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2249 READ_BUF(4);
2250 READ32(*maxlink);
2251 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2252 }
2253 dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
2254 return status;
2255}
2256
2257static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2258{
2259 uint32_t *p;
2260 int status = 0;
2261
2262 *maxname = 1024;
2263 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2264 return -EIO;
2265 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2266 READ_BUF(4);
2267 READ32(*maxname);
2268 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2269 }
2270 dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
2271 return status;
2272}
2273
2274static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2275{
2276 uint32_t *p;
2277 int status = 0;
2278
2279 *res = 1024;
2280 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2281 return -EIO;
2282 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2283 uint64_t maxread;
2284 READ_BUF(8);
2285 READ64(maxread);
2286 if (maxread > 0x7FFFFFFF)
2287 maxread = 0x7FFFFFFF;
2288 *res = (uint32_t)maxread;
2289 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2290 }
2291 dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
2292 return status;
2293}
2294
2295static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2296{
2297 uint32_t *p;
2298 int status = 0;
2299
2300 *res = 1024;
2301 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2302 return -EIO;
2303 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2304 uint64_t maxwrite;
2305 READ_BUF(8);
2306 READ64(maxwrite);
2307 if (maxwrite > 0x7FFFFFFF)
2308 maxwrite = 0x7FFFFFFF;
2309 *res = (uint32_t)maxwrite;
2310 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2311 }
2312 dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
2313 return status;
2314}
2315
2316static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2317{
2318 uint32_t *p;
2319
2320 *mode = 0;
2321 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2322 return -EIO;
2323 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2324 READ_BUF(4);
2325 READ32(*mode);
2326 *mode &= ~S_IFMT;
2327 bitmap[1] &= ~FATTR4_WORD1_MODE;
2328 }
2329 dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
2330 return 0;
2331}
2332
2333static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2334{
2335 uint32_t *p;
2336
2337 *nlink = 1;
2338 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2339 return -EIO;
2340 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2341 READ_BUF(4);
2342 READ32(*nlink);
2343 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2344 }
2345 dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
2346 return 0;
2347}
2348
2349static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *uid)
2350{
2351 uint32_t len, *p;
2352
2353 *uid = -2;
2354 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2355 return -EIO;
2356 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2357 READ_BUF(4);
2358 READ32(len);
2359 READ_BUF(len);
2360 if (len < XDR_MAX_NETOBJ) {
2361 if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2362 dprintk("%s: nfs_map_name_to_uid failed!\n",
2363 __FUNCTION__);
2364 } else
2365 printk(KERN_WARNING "%s: name too long (%u)!\n",
2366 __FUNCTION__, len);
2367 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2368 }
2369 dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
2370 return 0;
2371}
2372
2373static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *gid)
2374{
2375 uint32_t len, *p;
2376
2377 *gid = -2;
2378 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2379 return -EIO;
2380 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2381 READ_BUF(4);
2382 READ32(len);
2383 READ_BUF(len);
2384 if (len < XDR_MAX_NETOBJ) {
2385 if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2386 dprintk("%s: nfs_map_group_to_gid failed!\n",
2387 __FUNCTION__);
2388 } else
2389 printk(KERN_WARNING "%s: name too long (%u)!\n",
2390 __FUNCTION__, len);
2391 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2392 }
2393 dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
2394 return 0;
2395}
2396
2397static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2398{
2399 uint32_t major = 0, minor = 0, *p;
2400
2401 *rdev = MKDEV(0,0);
2402 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2403 return -EIO;
2404 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2405 dev_t tmp;
2406
2407 READ_BUF(8);
2408 READ32(major);
2409 READ32(minor);
2410 tmp = MKDEV(major, minor);
2411 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2412 *rdev = tmp;
2413 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2414 }
2415 dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
2416 return 0;
2417}
2418
2419static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2420{
2421 uint32_t *p;
2422 int status = 0;
2423
2424 *res = 0;
2425 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2426 return -EIO;
2427 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2428 READ_BUF(8);
2429 READ64(*res);
2430 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2431 }
2432 dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2433 return status;
2434}
2435
2436static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2437{
2438 uint32_t *p;
2439 int status = 0;
2440
2441 *res = 0;
2442 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2443 return -EIO;
2444 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2445 READ_BUF(8);
2446 READ64(*res);
2447 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2448 }
2449 dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2450 return status;
2451}
2452
2453static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2454{
2455 uint32_t *p;
2456 int status = 0;
2457
2458 *res = 0;
2459 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2460 return -EIO;
2461 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2462 READ_BUF(8);
2463 READ64(*res);
2464 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2465 }
2466 dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2467 return status;
2468}
2469
2470static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2471{
2472 uint32_t *p;
2473
2474 *used = 0;
2475 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2476 return -EIO;
2477 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2478 READ_BUF(8);
2479 READ64(*used);
2480 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2481 }
2482 dprintk("%s: space used=%Lu\n", __FUNCTION__,
2483 (unsigned long long)*used);
2484 return 0;
2485}
2486
2487static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2488{
2489 uint32_t *p;
2490 uint64_t sec;
2491 uint32_t nsec;
2492
2493 READ_BUF(12);
2494 READ64(sec);
2495 READ32(nsec);
2496 time->tv_sec = (time_t)sec;
2497 time->tv_nsec = (long)nsec;
2498 return 0;
2499}
2500
2501static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2502{
2503 int status = 0;
2504
2505 time->tv_sec = 0;
2506 time->tv_nsec = 0;
2507 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2508 return -EIO;
2509 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2510 status = decode_attr_time(xdr, time);
2511 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2512 }
2513 dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2514 return status;
2515}
2516
2517static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2518{
2519 int status = 0;
2520
2521 time->tv_sec = 0;
2522 time->tv_nsec = 0;
2523 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2524 return -EIO;
2525 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2526 status = decode_attr_time(xdr, time);
2527 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2528 }
2529 dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2530 return status;
2531}
2532
2533static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2534{
2535 int status = 0;
2536
2537 time->tv_sec = 0;
2538 time->tv_nsec = 0;
2539 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2540 return -EIO;
2541 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2542 status = decode_attr_time(xdr, time);
2543 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2544 }
2545 dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2546 return status;
2547}
2548
2549static int verify_attr_len(struct xdr_stream *xdr, uint32_t *savep, uint32_t attrlen)
2550{
2551 unsigned int attrwords = XDR_QUADLEN(attrlen);
2552 unsigned int nwords = xdr->p - savep;
2553
2554 if (unlikely(attrwords != nwords)) {
2555 printk(KERN_WARNING "%s: server returned incorrect attribute length: %u %c %u\n",
2556 __FUNCTION__,
2557 attrwords << 2,
2558 (attrwords < nwords) ? '<' : '>',
2559 nwords << 2);
2560 return -EIO;
2561 }
2562 return 0;
2563}
2564
2565static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2566{
2567 uint32_t *p;
2568
2569 READ_BUF(20);
2570 READ32(cinfo->atomic);
2571 READ64(cinfo->before);
2572 READ64(cinfo->after);
2573 return 0;
2574}
2575
2576static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2577{
2578 uint32_t *p;
2579 uint32_t supp, acc;
2580 int status;
2581
2582 status = decode_op_hdr(xdr, OP_ACCESS);
2583 if (status)
2584 return status;
2585 READ_BUF(8);
2586 READ32(supp);
2587 READ32(acc);
2588 access->supported = supp;
2589 access->access = acc;
2590 return 0;
2591}
2592
2593static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2594{
2595 uint32_t *p;
2596 int status;
2597
2598 status = decode_op_hdr(xdr, OP_CLOSE);
2599 if (status)
2600 return status;
2601 READ_BUF(sizeof(res->stateid.data));
2602 COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2603 return 0;
2604}
2605
2606static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
2607{
2608 uint32_t *p;
2609 int status;
2610
2611 status = decode_op_hdr(xdr, OP_COMMIT);
2612 if (status)
2613 return status;
2614 READ_BUF(8);
2615 COPYMEM(res->verf->verifier, 8);
2616 return 0;
2617}
2618
2619static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2620{
2621 uint32_t *p;
2622 uint32_t bmlen;
2623 int status;
2624
2625 status = decode_op_hdr(xdr, OP_CREATE);
2626 if (status)
2627 return status;
2628 if ((status = decode_change_info(xdr, cinfo)))
2629 return status;
2630 READ_BUF(4);
2631 READ32(bmlen);
2632 READ_BUF(bmlen << 2);
2633 return 0;
2634}
2635
2636static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
2637{
2638 uint32_t *savep;
2639 uint32_t attrlen,
2640 bitmap[2] = {0};
2641 int status;
2642
2643 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2644 goto xdr_error;
2645 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2646 goto xdr_error;
2647 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2648 goto xdr_error;
2649 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
2650 goto xdr_error;
2651 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
2652 goto xdr_error;
2653 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
2654 goto xdr_error;
2655 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
2656 goto xdr_error;
2657 status = verify_attr_len(xdr, savep, attrlen);
2658xdr_error:
2659 if (status != 0)
2660 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2661 return status;
2662}
2663
2664static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
2665{
2666 uint32_t *savep;
2667 uint32_t attrlen,
2668 bitmap[2] = {0};
2669 int status;
2670
2671 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2672 goto xdr_error;
2673 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2674 goto xdr_error;
2675 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2676 goto xdr_error;
2677
2678 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
2679 goto xdr_error;
2680 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
2681 goto xdr_error;
2682 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
2683 goto xdr_error;
2684 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
2685 goto xdr_error;
2686 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
2687 goto xdr_error;
2688 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
2689 goto xdr_error;
2690
2691 status = verify_attr_len(xdr, savep, attrlen);
2692xdr_error:
2693 if (status != 0)
2694 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2695 return status;
2696}
2697
2698static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
2699{
2700 uint32_t *savep;
2701 uint32_t attrlen,
2702 bitmap[2] = {0};
2703 int status;
2704
2705 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2706 goto xdr_error;
2707 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2708 goto xdr_error;
2709 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2710 goto xdr_error;
2711
2712 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
2713 goto xdr_error;
2714 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
2715 goto xdr_error;
2716
2717 status = verify_attr_len(xdr, savep, attrlen);
2718xdr_error:
2719 if (status != 0)
2720 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2721 return status;
2722}
2723
2724static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
2725{
2726 uint32_t *savep;
2727 uint32_t attrlen,
2728 bitmap[2] = {0},
2729 type;
2730 int status, fmode = 0;
2731
2732 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2733 goto xdr_error;
2734 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2735 goto xdr_error;
2736
2737 fattr->bitmap[0] = bitmap[0];
2738 fattr->bitmap[1] = bitmap[1];
2739
2740 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2741 goto xdr_error;
2742
2743
2744 if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
2745 goto xdr_error;
2746 fattr->type = nfs_type2fmt[type].nfs2type;
2747 fmode = nfs_type2fmt[type].mode;
2748
2749 if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
2750 goto xdr_error;
2751 if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
2752 goto xdr_error;
2753 if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid_u.nfs4)) != 0)
2754 goto xdr_error;
2755 if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
2756 goto xdr_error;
2757 if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
2758 goto xdr_error;
2759 fattr->mode |= fmode;
2760 if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
2761 goto xdr_error;
2762 if ((status = decode_attr_owner(xdr, bitmap, server->nfs4_state, &fattr->uid)) != 0)
2763 goto xdr_error;
2764 if ((status = decode_attr_group(xdr, bitmap, server->nfs4_state, &fattr->gid)) != 0)
2765 goto xdr_error;
2766 if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
2767 goto xdr_error;
2768 if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
2769 goto xdr_error;
2770 if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
2771 goto xdr_error;
2772 if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
2773 goto xdr_error;
2774 if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
2775 goto xdr_error;
2776 if ((status = verify_attr_len(xdr, savep, attrlen)) == 0) {
2777 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
2778 fattr->timestamp = jiffies;
2779 }
2780xdr_error:
2781 if (status != 0)
2782 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2783 return status;
2784}
2785
2786
2787static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
2788{
2789 uint32_t *savep;
2790 uint32_t attrlen, bitmap[2];
2791 int status;
2792
2793 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2794 goto xdr_error;
2795 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2796 goto xdr_error;
2797 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2798 goto xdr_error;
2799
2800 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
2801
2802 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
2803 goto xdr_error;
2804 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
2805 goto xdr_error;
2806 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
2807 goto xdr_error;
2808 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
2809 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
2810 goto xdr_error;
2811 fsinfo->wtpref = fsinfo->wtmax;
2812
2813 status = verify_attr_len(xdr, savep, attrlen);
2814xdr_error:
2815 if (status != 0)
2816 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2817 return status;
2818}
2819
2820static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
2821{
2822 uint32_t *p;
2823 uint32_t len;
2824 int status;
2825
2826 status = decode_op_hdr(xdr, OP_GETFH);
2827 if (status)
2828 return status;
2829 /* Zero handle first to allow comparisons */
2830 memset(fh, 0, sizeof(*fh));
2831
2832 READ_BUF(4);
2833 READ32(len);
2834 if (len > NFS4_FHSIZE)
2835 return -EIO;
2836 fh->size = len;
2837 READ_BUF(len);
2838 COPYMEM(fh->data, len);
2839 return 0;
2840}
2841
2842static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2843{
2844 int status;
2845
2846 status = decode_op_hdr(xdr, OP_LINK);
2847 if (status)
2848 return status;
2849 return decode_change_info(xdr, cinfo);
2850}
2851
2852/*
2853 * We create the owner, so we know a proper owner.id length is 4.
2854 */
2855static int decode_lock_denied (struct xdr_stream *xdr, struct nfs_lock_denied *denied)
2856{
2857 uint32_t *p;
2858 uint32_t namelen;
2859
2860 READ_BUF(32);
2861 READ64(denied->offset);
2862 READ64(denied->length);
2863 READ32(denied->type);
2864 READ64(denied->owner.clientid);
2865 READ32(namelen);
2866 READ_BUF(namelen);
2867 if (namelen == 4)
2868 READ32(denied->owner.id);
2869 return -NFS4ERR_DENIED;
2870}
2871
2872static int decode_lock(struct xdr_stream *xdr, struct nfs_lockres *res)
2873{
2874 uint32_t *p;
2875 int status;
2876
2877 status = decode_op_hdr(xdr, OP_LOCK);
2878 if (status == 0) {
2879 READ_BUF(sizeof(nfs4_stateid));
2880 COPYMEM(&res->u.stateid, sizeof(res->u.stateid));
2881 } else if (status == -NFS4ERR_DENIED)
2882 return decode_lock_denied(xdr, &res->u.denied);
2883 return status;
2884}
2885
2886static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockres *res)
2887{
2888 int status;
2889 status = decode_op_hdr(xdr, OP_LOCKT);
2890 if (status == -NFS4ERR_DENIED)
2891 return decode_lock_denied(xdr, &res->u.denied);
2892 return status;
2893}
2894
2895static int decode_locku(struct xdr_stream *xdr, struct nfs_lockres *res)
2896{
2897 uint32_t *p;
2898 int status;
2899
2900 status = decode_op_hdr(xdr, OP_LOCKU);
2901 if (status == 0) {
2902 READ_BUF(sizeof(nfs4_stateid));
2903 COPYMEM(&res->u.stateid, sizeof(res->u.stateid));
2904 }
2905 return status;
2906}
2907
2908static int decode_lookup(struct xdr_stream *xdr)
2909{
2910 return decode_op_hdr(xdr, OP_LOOKUP);
2911}
2912
2913/* This is too sick! */
2914static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
2915{
2916 uint32_t *p;
2917 uint32_t limit_type, nblocks, blocksize;
2918
2919 READ_BUF(12);
2920 READ32(limit_type);
2921 switch (limit_type) {
2922 case 1:
2923 READ64(*maxsize);
2924 break;
2925 case 2:
2926 READ32(nblocks);
2927 READ32(blocksize);
2928 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
2929 }
2930 return 0;
2931}
2932
2933static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
2934{
2935 uint32_t *p;
2936 uint32_t delegation_type;
2937
2938 READ_BUF(4);
2939 READ32(delegation_type);
2940 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
2941 res->delegation_type = 0;
2942 return 0;
2943 }
2944 READ_BUF(20);
2945 COPYMEM(res->delegation.data, sizeof(res->delegation.data));
2946 READ32(res->do_recall);
2947 switch (delegation_type) {
2948 case NFS4_OPEN_DELEGATE_READ:
2949 res->delegation_type = FMODE_READ;
2950 break;
2951 case NFS4_OPEN_DELEGATE_WRITE:
2952 res->delegation_type = FMODE_WRITE|FMODE_READ;
2953 if (decode_space_limit(xdr, &res->maxsize) < 0)
2954 return -EIO;
2955 }
2956 return decode_ace(xdr, NULL, res->server->nfs4_state);
2957}
2958
2959static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
2960{
2961 uint32_t *p;
2962 uint32_t bmlen;
2963 int status;
2964
2965 status = decode_op_hdr(xdr, OP_OPEN);
2966 if (status)
2967 return status;
2968 READ_BUF(sizeof(res->stateid.data));
2969 COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2970
2971 decode_change_info(xdr, &res->cinfo);
2972
2973 READ_BUF(8);
2974 READ32(res->rflags);
2975 READ32(bmlen);
2976 if (bmlen > 10)
2977 goto xdr_error;
2978
2979 READ_BUF(bmlen << 2);
2980 p += bmlen;
2981 return decode_delegation(xdr, res);
2982xdr_error:
2983 printk(KERN_NOTICE "%s: xdr error!\n", __FUNCTION__);
2984 return -EIO;
2985}
2986
2987static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
2988{
2989 uint32_t *p;
2990 int status;
2991
2992 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
2993 if (status)
2994 return status;
2995 READ_BUF(sizeof(res->stateid.data));
2996 COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2997 return 0;
2998}
2999
3000static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3001{
3002 uint32_t *p;
3003 int status;
3004
3005 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3006 if (status)
3007 return status;
3008 READ_BUF(sizeof(res->stateid.data));
3009 COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3010 return 0;
3011}
3012
3013static int decode_putfh(struct xdr_stream *xdr)
3014{
3015 return decode_op_hdr(xdr, OP_PUTFH);
3016}
3017
3018static int decode_putrootfh(struct xdr_stream *xdr)
3019{
3020 return decode_op_hdr(xdr, OP_PUTROOTFH);
3021}
3022
3023static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3024{
3025 struct kvec *iov = req->rq_rcv_buf.head;
3026 uint32_t *p;
3027 uint32_t count, eof, recvd, hdrlen;
3028 int status;
3029
3030 status = decode_op_hdr(xdr, OP_READ);
3031 if (status)
3032 return status;
3033 READ_BUF(8);
3034 READ32(eof);
3035 READ32(count);
3036 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3037 recvd = req->rq_rcv_buf.len - hdrlen;
3038 if (count > recvd) {
3039 printk(KERN_WARNING "NFS: server cheating in read reply: "
3040 "count %u > recvd %u\n", count, recvd);
3041 count = recvd;
3042 eof = 0;
3043 }
3044 xdr_read_pages(xdr, count);
3045 res->eof = eof;
3046 res->count = count;
3047 return 0;
3048}
3049
3050static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3051{
3052 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3053 struct page *page = *rcvbuf->pages;
3054 struct kvec *iov = rcvbuf->head;
3055 unsigned int nr, pglen = rcvbuf->page_len;
3056 uint32_t *end, *entry, *p, *kaddr;
3057 uint32_t len, attrlen;
3058 int hdrlen, recvd, status;
3059
3060 status = decode_op_hdr(xdr, OP_READDIR);
3061 if (status)
3062 return status;
3063 READ_BUF(8);
3064 COPYMEM(readdir->verifier.data, 8);
3065
3066 hdrlen = (char *) p - (char *) iov->iov_base;
3067 recvd = rcvbuf->len - hdrlen;
3068 if (pglen > recvd)
3069 pglen = recvd;
3070 xdr_read_pages(xdr, pglen);
3071
3072 BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3073 kaddr = p = (uint32_t *) kmap_atomic(page, KM_USER0);
3074 end = (uint32_t *) ((char *)p + pglen + readdir->pgbase);
3075 entry = p;
3076 for (nr = 0; *p++; nr++) {
3077 if (p + 3 > end)
3078 goto short_pkt;
3079 p += 2; /* cookie */
3080 len = ntohl(*p++); /* filename length */
3081 if (len > NFS4_MAXNAMLEN) {
3082 printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)\n", len);
3083 goto err_unmap;
3084 }
3085 p += XDR_QUADLEN(len);
3086 if (p + 1 > end)
3087 goto short_pkt;
3088 len = ntohl(*p++); /* bitmap length */
3089 p += len;
3090 if (p + 1 > end)
3091 goto short_pkt;
3092 attrlen = XDR_QUADLEN(ntohl(*p++));
3093 p += attrlen; /* attributes */
3094 if (p + 2 > end)
3095 goto short_pkt;
3096 entry = p;
3097 }
3098 if (!nr && (entry[0] != 0 || entry[1] == 0))
3099 goto short_pkt;
3100out:
3101 kunmap_atomic(kaddr, KM_USER0);
3102 return 0;
3103short_pkt:
3104 entry[0] = entry[1] = 0;
3105 /* truncate listing ? */
3106 if (!nr) {
3107 printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
3108 entry[1] = 1;
3109 }
3110 goto out;
3111err_unmap:
3112 kunmap_atomic(kaddr, KM_USER0);
3113 return -errno_NFSERR_IO;
3114}
3115
3116static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3117{
3118 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3119 struct kvec *iov = rcvbuf->head;
3120 int hdrlen, len, recvd;
3121 uint32_t *p;
3122 char *kaddr;
3123 int status;
3124
3125 status = decode_op_hdr(xdr, OP_READLINK);
3126 if (status)
3127 return status;
3128
3129 /* Convert length of symlink */
3130 READ_BUF(4);
3131 READ32(len);
3132 if (len >= rcvbuf->page_len || len <= 0) {
3133 dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
3134 return -ENAMETOOLONG;
3135 }
3136 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3137 recvd = req->rq_rcv_buf.len - hdrlen;
3138 if (recvd < len) {
3139 printk(KERN_WARNING "NFS: server cheating in readlink reply: "
3140 "count %u > recvd %u\n", len, recvd);
3141 return -EIO;
3142 }
3143 xdr_read_pages(xdr, len);
3144 /*
3145 * The XDR encode routine has set things up so that
3146 * the link text will be copied directly into the
3147 * buffer. We just have to do overflow-checking,
3148 * and and null-terminate the text (the VFS expects
3149 * null-termination).
3150 */
3151 kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3152 kaddr[len+rcvbuf->page_base] = '\0';
3153 kunmap_atomic(kaddr, KM_USER0);
3154 return 0;
3155}
3156
3157static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3158{
3159 int status;
3160
3161 status = decode_op_hdr(xdr, OP_REMOVE);
3162 if (status)
3163 goto out;
3164 status = decode_change_info(xdr, cinfo);
3165out:
3166 return status;
3167}
3168
3169static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3170 struct nfs4_change_info *new_cinfo)
3171{
3172 int status;
3173
3174 status = decode_op_hdr(xdr, OP_RENAME);
3175 if (status)
3176 goto out;
3177 if ((status = decode_change_info(xdr, old_cinfo)))
3178 goto out;
3179 status = decode_change_info(xdr, new_cinfo);
3180out:
3181 return status;
3182}
3183
3184static int decode_renew(struct xdr_stream *xdr)
3185{
3186 return decode_op_hdr(xdr, OP_RENEW);
3187}
3188
029d105e
BF		 3189static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3190 size_t *acl_len)
3191{
3192 uint32_t *savep;
3193 uint32_t attrlen,
3194 bitmap[2] = {0};
3195 struct kvec *iov = req->rq_rcv_buf.head;
3196 int status;
3197
3198 *acl_len = 0;
3199 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3200 goto out;
3201 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3202 goto out;
3203 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3204 goto out;
3205
3206 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3207 return -EIO;
3208 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3209 int hdrlen, recvd;
3210
3211 /* We ignore &savep and don't do consistency checks on
3212 * the attr length. Let userspace figure it out.... */
3213 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3214 recvd = req->rq_rcv_buf.len - hdrlen;
3215 if (attrlen > recvd) {
3216 printk(KERN_WARNING "NFS: server cheating in getattr"
3217 " acl reply: attrlen %u > recvd %u\n",
3218 attrlen, recvd);
3219 return -EINVAL;
3220 }
3221 if (attrlen <= *acl_len)
3222 xdr_read_pages(xdr, attrlen);
3223 *acl_len = attrlen;
3224 }
3225
3226out:
3227 return status;
3228}
3229
1da177e4
LT		 3230static int
3231decode_savefh(struct xdr_stream *xdr)
3232{
3233 return decode_op_hdr(xdr, OP_SAVEFH);
3234}
3235
3236static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3237{
3238 uint32_t *p;
3239 uint32_t bmlen;
3240 int status;
3241
3242
3243 status = decode_op_hdr(xdr, OP_SETATTR);
3244 if (status)
3245 return status;
3246 READ_BUF(4);
3247 READ32(bmlen);
3248 READ_BUF(bmlen << 2);
3249 return 0;
3250}
3251
3252static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_client *clp)
3253{
3254 uint32_t *p;
3255 uint32_t opnum;
3256 int32_t nfserr;
3257
3258 READ_BUF(8);
3259 READ32(opnum);
3260 if (opnum != OP_SETCLIENTID) {
3261 printk(KERN_NOTICE
3262 "nfs4_decode_setclientid: Server returned operation"
3263 " %d\n", opnum);
3264 return -EIO;
3265 }
3266 READ32(nfserr);
3267 if (nfserr == NFS_OK) {
3268 READ_BUF(8 + sizeof(clp->cl_confirm.data));
3269 READ64(clp->cl_clientid);
3270 COPYMEM(clp->cl_confirm.data, sizeof(clp->cl_confirm.data));
3271 } else if (nfserr == NFSERR_CLID_INUSE) {
3272 uint32_t len;
3273
3274 /* skip netid string */
3275 READ_BUF(4);
3276 READ32(len);
3277 READ_BUF(len);
3278
3279 /* skip uaddr string */
3280 READ_BUF(4);
3281 READ32(len);
3282 READ_BUF(len);
3283 return -NFSERR_CLID_INUSE;
3284 } else
3285 return -nfs_stat_to_errno(nfserr);
3286
3287 return 0;
3288}
3289
3290static int decode_setclientid_confirm(struct xdr_stream *xdr)
3291{
3292 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3293}
3294
3295static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3296{
3297 uint32_t *p;
3298 int status;
3299
3300 status = decode_op_hdr(xdr, OP_WRITE);
3301 if (status)
3302 return status;
3303
3304 READ_BUF(16);
3305 READ32(res->count);
3306 READ32(res->verf->committed);
3307 COPYMEM(res->verf->verifier, 8);
3308 return 0;
3309}
3310
3311static int decode_delegreturn(struct xdr_stream *xdr)
3312{
3313 return decode_op_hdr(xdr, OP_DELEGRETURN);
3314}
3315
3316/*
3317 * Decode OPEN_DOWNGRADE response
3318 */
3319static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3320{
3321 struct xdr_stream xdr;
3322 struct compound_hdr hdr;
3323 int status;
3324
3325 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3326 status = decode_compound_hdr(&xdr, &hdr);
3327 if (status)
3328 goto out;
3329 status = decode_putfh(&xdr);
3330 if (status)
3331 goto out;
3332 status = decode_open_downgrade(&xdr, res);
3333out:
3334 return status;
3335}
3336
3337/*
3338 * END OF "GENERIC" DECODE ROUTINES.
3339 */
3340
3341/*
3342 * Decode ACCESS response
3343 */
3344static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_accessres *res)
3345{
3346 struct xdr_stream xdr;
3347 struct compound_hdr hdr;
3348 int status;
3349
3350 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3351 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3352 goto out;
3353 if ((status = decode_putfh(&xdr)) == 0)
3354 status = decode_access(&xdr, res);
3355out:
3356 return status;
3357}
3358
3359/*
3360 * Decode LOOKUP response
3361 */
3362static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
3363{
3364 struct xdr_stream xdr;
3365 struct compound_hdr hdr;
3366 int status;
3367
3368 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3369 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3370 goto out;
3371 if ((status = decode_putfh(&xdr)) != 0)
3372 goto out;
3373 if ((status = decode_lookup(&xdr)) != 0)
3374 goto out;
3375 if ((status = decode_getfh(&xdr, res->fh)) != 0)
3376 goto out;
3377 status = decode_getfattr(&xdr, res->fattr, res->server);
3378out:
3379 return status;
3380}
3381
3382/*
3383 * Decode LOOKUP_ROOT response
3384 */
3385static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
3386{
3387 struct xdr_stream xdr;
3388 struct compound_hdr hdr;
3389 int status;
3390
3391 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3392 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3393 goto out;
3394 if ((status = decode_putrootfh(&xdr)) != 0)
3395 goto out;
3396 if ((status = decode_getfh(&xdr, res->fh)) == 0)
3397 status = decode_getfattr(&xdr, res->fattr, res->server);
3398out:
3399 return status;
3400}
3401
3402/*
3403 * Decode REMOVE response
3404 */
3405static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_change_info *cinfo)
3406{
3407 struct xdr_stream xdr;
3408 struct compound_hdr hdr;
3409 int status;
3410
3411 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3412 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3413 goto out;
3414 if ((status = decode_putfh(&xdr)) == 0)
3415 status = decode_remove(&xdr, cinfo);
3416out:
3417 return status;
3418}
3419
3420/*
3421 * Decode RENAME response
3422 */
3423static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_rename_res *res)
3424{
3425 struct xdr_stream xdr;
3426 struct compound_hdr hdr;
3427 int status;
3428
3429 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3430 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3431 goto out;
3432 if ((status = decode_putfh(&xdr)) != 0)
3433 goto out;
3434 if ((status = decode_savefh(&xdr)) != 0)
3435 goto out;
3436 if ((status = decode_putfh(&xdr)) != 0)
3437 goto out;
3438 status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo);
3439out:
3440 return status;
3441}
3442
3443/*
3444 * Decode LINK response
3445 */
3446static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_change_info *cinfo)
3447{
3448 struct xdr_stream xdr;
3449 struct compound_hdr hdr;
3450 int status;
3451
3452 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3453 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3454 goto out;
3455 if ((status = decode_putfh(&xdr)) != 0)
3456 goto out;
3457 if ((status = decode_savefh(&xdr)) != 0)
3458 goto out;
3459 if ((status = decode_putfh(&xdr)) != 0)
3460 goto out;
3461 status = decode_link(&xdr, cinfo);
3462out:
3463 return status;
3464}
3465
3466/*
3467 * Decode CREATE response
3468 */
3469static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
3470{
3471 struct xdr_stream xdr;
3472 struct compound_hdr hdr;
3473 int status;
3474
3475 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3476 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3477 goto out;
3478 if ((status = decode_putfh(&xdr)) != 0)
3479 goto out;
3480 if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3481 goto out;
3482 if ((status = decode_getfh(&xdr, res->fh)) != 0)
3483 goto out;
3484 status = decode_getfattr(&xdr, res->fattr, res->server);
3485 if (status == NFS4ERR_DELAY)
3486 status = 0;
3487out:
3488 return status;
3489}
3490
3491/*
3492 * Decode SYMLINK response
3493 */
3494static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
3495{
3496 return nfs4_xdr_dec_create(rqstp, p, res);
3497}
3498
3499/*
3500 * Decode GETATTR response
3501 */
3502static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_getattr_res *res)
3503{
3504 struct xdr_stream xdr;
3505 struct compound_hdr hdr;
3506 int status;
3507
3508 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3509 status = decode_compound_hdr(&xdr, &hdr);
3510 if (status)
3511 goto out;
3512 status = decode_putfh(&xdr);
3513 if (status)
3514 goto out;
3515 status = decode_getfattr(&xdr, res->fattr, res->server);
3516out:
3517 return status;
3518
3519}
3520
23ec6965
BF		 3521/*
3522 * Encode an SETACL request
3523 */
3524static int
3525nfs4_xdr_enc_setacl(struct rpc_rqst *req, uint32_t *p, struct nfs_setaclargs *args)
3526{
3527 struct xdr_stream xdr;
3528 struct compound_hdr hdr = {
3529 .nops = 2,
3530 };
3531 int status;
3532
3533 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
3534 encode_compound_hdr(&xdr, &hdr);
3535 status = encode_putfh(&xdr, args->fh);
3536 if (status)
3537 goto out;
3538 status = encode_setacl(&xdr, args);
3539out:
3540 return status;
3541}
3542/*
3543 * Decode SETACL response
3544 */
3545static int
3546nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, uint32_t *p, void *res)
3547{
3548 struct xdr_stream xdr;
3549 struct compound_hdr hdr;
3550 int status;
3551
3552 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3553 status = decode_compound_hdr(&xdr, &hdr);
3554 if (status)
3555 goto out;
3556 status = decode_putfh(&xdr);
3557 if (status)
3558 goto out;
3559 status = decode_setattr(&xdr, res);
3560out:
3561 return status;
3562}
1da177e4 3563
029d105e
BF		 3564/*
3565 * Decode GETACL response
3566 */
3567static int
3568nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, uint32_t *p, size_t *acl_len)
3569{
3570 struct xdr_stream xdr;
3571 struct compound_hdr hdr;
3572 int status;
3573
3574 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3575 status = decode_compound_hdr(&xdr, &hdr);
3576 if (status)
3577 goto out;
3578 status = decode_putfh(&xdr);
3579 if (status)
3580 goto out;
3581 status = decode_getacl(&xdr, rqstp, acl_len);
3582
3583out:
3584 return status;
3585}
3586
1da177e4
LT		 3587/*
3588 * Decode CLOSE response
3589 */
3590static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3591{
3592 struct xdr_stream xdr;
3593 struct compound_hdr hdr;
3594 int status;
3595
3596 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3597 status = decode_compound_hdr(&xdr, &hdr);
3598 if (status)
3599 goto out;
3600 status = decode_putfh(&xdr);
3601 if (status)
3602 goto out;
3603 status = decode_close(&xdr, res);
3604out:
3605 return status;
3606}
3607
3608/*
3609 * Decode OPEN response
3610 */
3611static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
3612{
3613 struct xdr_stream xdr;
3614 struct compound_hdr hdr;
3615 int status;
3616
3617 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3618 status = decode_compound_hdr(&xdr, &hdr);
3619 if (status)
3620 goto out;
3621 status = decode_putfh(&xdr);
3622 if (status)
3623 goto out;
3624 status = decode_open(&xdr, res);
3625 if (status)
3626 goto out;
3627 status = decode_getfh(&xdr, &res->fh);
3628 if (status)
3629 goto out;
3630 status = decode_getfattr(&xdr, res->f_attr, res->server);
3631 if (status == NFS4ERR_DELAY)
3632 status = 0;
3633out:
3634 return status;
3635}
3636
3637/*
3638 * Decode OPEN_CONFIRM response
3639 */
3640static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_open_confirmres *res)
3641{
3642 struct xdr_stream xdr;
3643 struct compound_hdr hdr;
3644 int status;
3645
3646 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3647 status = decode_compound_hdr(&xdr, &hdr);
3648 if (status)
3649 goto out;
3650 status = decode_putfh(&xdr);
3651 if (status)
3652 goto out;
3653 status = decode_open_confirm(&xdr, res);
3654out:
3655 return status;
3656}
3657
3658/*
3659 * Decode OPEN response
3660 */
3661static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
3662{
3663 struct xdr_stream xdr;
3664 struct compound_hdr hdr;
3665 int status;
3666
3667 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3668 status = decode_compound_hdr(&xdr, &hdr);
3669 if (status)
3670 goto out;
3671 status = decode_putfh(&xdr);
3672 if (status)
3673 goto out;
3674 status = decode_open(&xdr, res);
3675out:
3676 return status;
3677}
3678
3679/*
3680 * Decode SETATTR response
3681 */
3682static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_setattrres *res)
3683{
3684 struct xdr_stream xdr;
3685 struct compound_hdr hdr;
3686 int status;
3687
3688 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3689 status = decode_compound_hdr(&xdr, &hdr);
3690 if (status)
3691 goto out;
3692 status = decode_putfh(&xdr);
3693 if (status)
3694 goto out;
3695 status = decode_setattr(&xdr, res);
3696 if (status)
3697 goto out;
3698 status = decode_getfattr(&xdr, res->fattr, res->server);
3699 if (status == NFS4ERR_DELAY)
3700 status = 0;
3701out:
3702 return status;
3703}
3704
3705/*
3706 * Decode LOCK response
3707 */
3708static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
3709{
3710 struct xdr_stream xdr;
3711 struct compound_hdr hdr;
3712 int status;
3713
3714 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3715 status = decode_compound_hdr(&xdr, &hdr);
3716 if (status)
3717 goto out;
3718 status = decode_putfh(&xdr);
3719 if (status)
3720 goto out;
3721 status = decode_lock(&xdr, res);
3722out:
3723 return status;
3724}
3725
3726/*
3727 * Decode LOCKT response
3728 */
3729static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
3730{
3731 struct xdr_stream xdr;
3732 struct compound_hdr hdr;
3733 int status;
3734
3735 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3736 status = decode_compound_hdr(&xdr, &hdr);
3737 if (status)
3738 goto out;
3739 status = decode_putfh(&xdr);
3740 if (status)
3741 goto out;
3742 status = decode_lockt(&xdr, res);
3743out:
3744 return status;
3745}
3746
3747/*
3748 * Decode LOCKU response
3749 */
3750static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
3751{
3752 struct xdr_stream xdr;
3753 struct compound_hdr hdr;
3754 int status;
3755
3756 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3757 status = decode_compound_hdr(&xdr, &hdr);
3758 if (status)
3759 goto out;
3760 status = decode_putfh(&xdr);
3761 if (status)
3762 goto out;
3763 status = decode_locku(&xdr, res);
3764out:
3765 return status;
3766}
3767
3768/*
3769 * Decode READLINK response
3770 */
3771static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, uint32_t *p, void *res)
3772{
3773 struct xdr_stream xdr;
3774 struct compound_hdr hdr;
3775 int status;
3776
3777 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3778 status = decode_compound_hdr(&xdr, &hdr);
3779 if (status)
3780 goto out;
3781 status = decode_putfh(&xdr);
3782 if (status)
3783 goto out;
3784 status = decode_readlink(&xdr, rqstp);
3785out:
3786 return status;
3787}
3788
3789/*
3790 * Decode READDIR response
3791 */
3792static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_readdir_res *res)
3793{
3794 struct xdr_stream xdr;
3795 struct compound_hdr hdr;
3796 int status;
3797
3798 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3799 status = decode_compound_hdr(&xdr, &hdr);
3800 if (status)
3801 goto out;
3802 status = decode_putfh(&xdr);
3803 if (status)
3804 goto out;
3805 status = decode_readdir(&xdr, rqstp, res);
3806out:
3807 return status;
3808}
3809
3810/*
3811 * Decode Read response
3812 */
3813static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_readres *res)
3814{
3815 struct xdr_stream xdr;
3816 struct compound_hdr hdr;
3817 int status;
3818
3819 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3820 status = decode_compound_hdr(&xdr, &hdr);
3821 if (status)
3822 goto out;
3823 status = decode_putfh(&xdr);
3824 if (status)
3825 goto out;
3826 status = decode_read(&xdr, rqstp, res);
3827 if (!status)
3828 status = res->count;
3829out:
3830 return status;
3831}
3832
3833/*
3834 * Decode WRITE response
3835 */
3836static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
3837{
3838 struct xdr_stream xdr;
3839 struct compound_hdr hdr;
3840 int status;
3841
3842 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3843 status = decode_compound_hdr(&xdr, &hdr);
3844 if (status)
3845 goto out;
3846 status = decode_putfh(&xdr);
3847 if (status)
3848 goto out;
3849 status = decode_write(&xdr, res);
3850 if (!status)
3851 status = res->count;
3852out:
3853 return status;
3854}
3855
3856/*
3857 * Decode COMMIT response
3858 */
3859static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
3860{
3861 struct xdr_stream xdr;
3862 struct compound_hdr hdr;
3863 int status;
3864
3865 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3866 status = decode_compound_hdr(&xdr, &hdr);
3867 if (status)
3868 goto out;
3869 status = decode_putfh(&xdr);
3870 if (status)
3871 goto out;
3872 status = decode_commit(&xdr, res);
3873out:
3874 return status;
3875}
3876
3877/*
3878 * FSINFO request
3879 */
3880static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
3881{
3882 struct xdr_stream xdr;
3883 struct compound_hdr hdr;
3884 int status;
3885
3886 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3887 status = decode_compound_hdr(&xdr, &hdr);
3888 if (!status)
3889 status = decode_putfh(&xdr);
3890 if (!status)
3891 status = decode_fsinfo(&xdr, fsinfo);
3892 if (!status)
3893 status = -nfs_stat_to_errno(hdr.status);
3894 return status;
3895}
3896
3897/*
3898 * PATHCONF request
3899 */
3900static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, uint32_t *p, struct nfs_pathconf *pathconf)
3901{
3902 struct xdr_stream xdr;
3903 struct compound_hdr hdr;
3904 int status;
3905
3906 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3907 status = decode_compound_hdr(&xdr, &hdr);
3908 if (!status)
3909 status = decode_putfh(&xdr);
3910 if (!status)
3911 status = decode_pathconf(&xdr, pathconf);
3912 return status;
3913}
3914
3915/*
3916 * STATFS request
3917 */
3918static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, uint32_t *p, struct nfs_fsstat *fsstat)
3919{
3920 struct xdr_stream xdr;
3921 struct compound_hdr hdr;
3922 int status;
3923
3924 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3925 status = decode_compound_hdr(&xdr, &hdr);
3926 if (!status)
3927 status = decode_putfh(&xdr);
3928 if (!status)
3929 status = decode_statfs(&xdr, fsstat);
3930 return status;
3931}
3932
3933/*
3934 * GETATTR_BITMAP request
3935 */
3936static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, uint32_t *p, struct nfs4_server_caps_res *res)
3937{
3938 struct xdr_stream xdr;
3939 struct compound_hdr hdr;
3940 int status;
3941
3942 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3943 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3944 goto out;
3945 if ((status = decode_putfh(&xdr)) != 0)
3946 goto out;
3947 status = decode_server_caps(&xdr, res);
3948out:
3949 return status;
3950}
3951
3952/*
3953 * Decode RENEW response
3954 */
3955static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)
3956{
3957 struct xdr_stream xdr;
3958 struct compound_hdr hdr;
3959 int status;
3960
3961 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3962 status = decode_compound_hdr(&xdr, &hdr);
3963 if (!status)
3964 status = decode_renew(&xdr);
3965 return status;
3966}
3967
3968/*
3969 * a SETCLIENTID request
3970 */
3971static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, uint32_t *p,
3972 struct nfs4_client *clp)
3973{
3974 struct xdr_stream xdr;
3975 struct compound_hdr hdr;
3976 int status;
3977
3978 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3979 status = decode_compound_hdr(&xdr, &hdr);
3980 if (!status)
3981 status = decode_setclientid(&xdr, clp);
3982 if (!status)
3983 status = -nfs_stat_to_errno(hdr.status);
3984 return status;
3985}
3986
3987/*
3988 * a SETCLIENTID_CONFIRM request
3989 */
3990static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
3991{
3992 struct xdr_stream xdr;
3993 struct compound_hdr hdr;
3994 int status;
3995
3996 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3997 status = decode_compound_hdr(&xdr, &hdr);
3998 if (!status)
3999 status = decode_setclientid_confirm(&xdr);
4000 if (!status)
4001 status = decode_putrootfh(&xdr);
4002 if (!status)
4003 status = decode_fsinfo(&xdr, fsinfo);
4004 if (!status)
4005 status = -nfs_stat_to_errno(hdr.status);
4006 return status;
4007}
4008
4009/*
4010 * DELEGRETURN request
4011 */
4012static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)
4013{
4014 struct xdr_stream xdr;
4015 struct compound_hdr hdr;
4016 int status;
4017
4018 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4019 status = decode_compound_hdr(&xdr, &hdr);
4020 if (status == 0) {
4021 status = decode_putfh(&xdr);
4022 if (status == 0)
4023 status = decode_delegreturn(&xdr);
4024 }
4025 return status;
4026}
4027
4028uint32_t *nfs4_decode_dirent(uint32_t *p, struct nfs_entry *entry, int plus)
4029{
4030 uint32_t bitmap[2] = {0};
4031 uint32_t len;
4032
4033 if (!*p++) {
4034 if (!*p)
4035 return ERR_PTR(-EAGAIN);
4036 entry->eof = 1;
4037 return ERR_PTR(-EBADCOOKIE);
4038 }
4039
4040 entry->prev_cookie = entry->cookie;
4041 p = xdr_decode_hyper(p, &entry->cookie);
4042 entry->len = ntohl(*p++);
4043 entry->name = (const char *) p;
4044 p += XDR_QUADLEN(entry->len);
4045
4046 /*
4047 * In case the server doesn't return an inode number,
4048 * we fake one here. (We don't use inode number 0,
4049 * since glibc seems to choke on it...)
4050 */
4051 entry->ino = 1;
4052
4053 len = ntohl(*p++); /* bitmap length */
4054 if (len-- > 0) {
4055 bitmap[0] = ntohl(*p++);
4056 if (len-- > 0) {
4057 bitmap[1] = ntohl(*p++);
4058 p += len;
4059 }
4060 }
4061 len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4062 if (len > 0) {
4063 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4064 xdr_decode_hyper(p, &entry->ino);
4065 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4066 xdr_decode_hyper(p, &entry->ino);
4067 p += len;
4068 }
4069
4070 entry->eof = !p[0] && p[1];
4071 return p;
4072}
4073
4074/*
4075 * We need to translate between nfs status return values and
4076 * the local errno values which may not be the same.
4077 */
4078static struct {
4079 int stat;
4080 int errno;
4081} nfs_errtbl[] = {
4082 { NFS4_OK, 0 },
4083 { NFS4ERR_PERM, EPERM },
4084 { NFS4ERR_NOENT, ENOENT },
4085 { NFS4ERR_IO, errno_NFSERR_IO },
4086 { NFS4ERR_NXIO, ENXIO },
4087 { NFS4ERR_ACCESS, EACCES },
4088 { NFS4ERR_EXIST, EEXIST },
4089 { NFS4ERR_XDEV, EXDEV },
4090 { NFS4ERR_NOTDIR, ENOTDIR },
4091 { NFS4ERR_ISDIR, EISDIR },
4092 { NFS4ERR_INVAL, EINVAL },
4093 { NFS4ERR_FBIG, EFBIG },
4094 { NFS4ERR_NOSPC, ENOSPC },
4095 { NFS4ERR_ROFS, EROFS },
4096 { NFS4ERR_MLINK, EMLINK },
4097 { NFS4ERR_NAMETOOLONG, ENAMETOOLONG },
4098 { NFS4ERR_NOTEMPTY, ENOTEMPTY },
4099 { NFS4ERR_DQUOT, EDQUOT },
4100 { NFS4ERR_STALE, ESTALE },
4101 { NFS4ERR_BADHANDLE, EBADHANDLE },
4102 { NFS4ERR_BAD_COOKIE, EBADCOOKIE },
4103 { NFS4ERR_NOTSUPP, ENOTSUPP },
4104 { NFS4ERR_TOOSMALL, ETOOSMALL },
4105 { NFS4ERR_SERVERFAULT, ESERVERFAULT },
4106 { NFS4ERR_BADTYPE, EBADTYPE },
4107 { NFS4ERR_LOCKED, EAGAIN },
4108 { NFS4ERR_RESOURCE, EREMOTEIO },
4109 { NFS4ERR_SYMLINK, ELOOP },
4110 { NFS4ERR_OP_ILLEGAL, EOPNOTSUPP },
4111 { NFS4ERR_DEADLOCK, EDEADLK },
4112 { NFS4ERR_WRONGSEC, EPERM }, /* FIXME: this needs
4113 * to be handled by a
4114 * middle-layer.
4115 */
4116 { -1, EIO }
4117};
4118
4119/*
4120 * Convert an NFS error code to a local one.
4121 * This one is used jointly by NFSv2 and NFSv3.
4122 */
4123static int
4124nfs_stat_to_errno(int stat)
4125{
4126 int i;
4127 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4128 if (nfs_errtbl[i].stat == stat)
4129 return nfs_errtbl[i].errno;
4130 }
4131 if (stat <= 10000 || stat > 10100) {
4132 /* The server is looney tunes. */
4133 return ESERVERFAULT;
4134 }
4135 /* If we cannot translate the error, the recovery routines should
4136 * handle it.
4137 * Note: remaining NFSv4 error codes have values > 10000, so should
4138 * not conflict with native Linux error codes.
4139 */
4140 return stat;
4141}
4142
4143#ifndef MAX
4144# define MAX(a, b) (((a) > (b))? (a) : (b))
4145#endif
4146
4147#define PROC(proc, argtype, restype) \
4148[NFSPROC4_CLNT_##proc] = { \
4149 .p_proc = NFSPROC4_COMPOUND, \
4150 .p_encode = (kxdrproc_t) nfs4_xdr_##argtype, \
4151 .p_decode = (kxdrproc_t) nfs4_xdr_##restype, \
4152 .p_bufsiz = MAX(NFS4_##argtype##_sz,NFS4_##restype##_sz) << 2, \
4153 }
4154
4155struct rpc_procinfo nfs4_procedures[] = {
4156 PROC(READ, enc_read, dec_read),
4157 PROC(WRITE, enc_write, dec_write),
4158 PROC(COMMIT, enc_commit, dec_commit),
4159 PROC(OPEN, enc_open, dec_open),
4160 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
4161 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
4162 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
4163 PROC(CLOSE, enc_close, dec_close),
4164 PROC(SETATTR, enc_setattr, dec_setattr),
4165 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
4166 PROC(RENEW, enc_renew, dec_renew),
4167 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
4168 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
4169 PROC(LOCK, enc_lock, dec_lock),
4170 PROC(LOCKT, enc_lockt, dec_lockt),
4171 PROC(LOCKU, enc_locku, dec_locku),
4172 PROC(ACCESS, enc_access, dec_access),
4173 PROC(GETATTR, enc_getattr, dec_getattr),
4174 PROC(LOOKUP, enc_lookup, dec_lookup),
4175 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
4176 PROC(REMOVE, enc_remove, dec_remove),
4177 PROC(RENAME, enc_rename, dec_rename),
4178 PROC(LINK, enc_link, dec_link),
4179 PROC(SYMLINK, enc_symlink, dec_symlink),
4180 PROC(CREATE, enc_create, dec_create),
4181 PROC(PATHCONF, enc_pathconf, dec_pathconf),
4182 PROC(STATFS, enc_statfs, dec_statfs),
4183 PROC(READLINK, enc_readlink, dec_readlink),
4184 PROC(READDIR, enc_readdir, dec_readdir),
4185 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
4186 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
029d105e 4187 PROC(GETACL, enc_getacl, dec_getacl),
23ec6965 4188 PROC(SETACL, enc_setacl, dec_setacl),
1da177e4
LT		 4189};
4190
4191struct rpc_version nfs_version4 = {
4192 .number = 4,
4193 .nrprocs = sizeof(nfs4_procedures)/sizeof(nfs4_procedures[0]),
4194 .procs = nfs4_procedures
4195};
4196
4197/*
4198 * Local variables:
4199 * c-basic-offset: 8
4200 * End:
4201 */
Linux 6.x block layer and io_uring tree(s)