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Automatic merge of rsync://rsync.kernel.org/pub/scm/linux/kernel/git/gregkh/driver...
[linux-2.6/verdex.git] / fs / nfs / nfs4xdr.c
blob5f4de05763c98edae3de9d7bd702eec265d5cf2a
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>
54
55 #define NFSDBG_FACILITY NFSDBG_XDR
56
57 /* Mapping from NFS error code to "errno" error code. */
58 #define errno_NFSERR_IO EIO
59
60 static int nfs_stat_to_errno(int);
61
62 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
63 #ifdef DEBUG
64 #define NFS4_MAXTAGLEN 20
65 #else
66 #define NFS4_MAXTAGLEN 0
67 #endif
68
69 /* lock,open owner id:
70 * we currently use size 1 (u32) out of (NFS4_OPAQUE_LIMIT >> 2)
71 */
72 #define owner_id_maxsz (1 + 1)
73 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
74 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
75 #define op_encode_hdr_maxsz (1)
76 #define op_decode_hdr_maxsz (2)
77 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
78 (NFS4_FHSIZE >> 2))
79 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
80 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
81 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
82 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
83 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
84 ((3+NFS4_FHSIZE) >> 2))
85 #define encode_getattr_maxsz (op_encode_hdr_maxsz + 3)
86 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
87 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
88 #define nfs4_fattr_bitmap_maxsz (36 + 2 * nfs4_name_maxsz)
89 #define decode_getattr_maxsz (op_decode_hdr_maxsz + 3 + \
90 nfs4_fattr_bitmap_maxsz)
91 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
92 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
93 #define encode_fsinfo_maxsz (op_encode_hdr_maxsz + 2)
94 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + 11)
95 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
96 #define decode_renew_maxsz (op_decode_hdr_maxsz)
97 #define encode_setclientid_maxsz \
98 (op_encode_hdr_maxsz + \
99 4 /*server->ip_addr*/ + \
100 1 /*Netid*/ + \
101 6 /*uaddr*/ + \
102 6 + (NFS4_VERIFIER_SIZE >> 2))
103 #define decode_setclientid_maxsz \
104 (op_decode_hdr_maxsz + \
105 2 + \
106 1024) /* large value for CLID_INUSE */
107 #define encode_setclientid_confirm_maxsz \
108 (op_encode_hdr_maxsz + \
109 3 + (NFS4_VERIFIER_SIZE >> 2))
110 #define decode_setclientid_confirm_maxsz \
111 (op_decode_hdr_maxsz)
112 #define encode_lookup_maxsz (op_encode_hdr_maxsz + \
113 1 + ((3 + NFS4_FHSIZE) >> 2))
114 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
115 nfs4_name_maxsz)
116 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
117 2 * nfs4_name_maxsz)
118 #define decode_rename_maxsz (op_decode_hdr_maxsz + 5 + 5)
119 #define encode_link_maxsz (op_encode_hdr_maxsz + \
120 nfs4_name_maxsz)
121 #define decode_link_maxsz (op_decode_hdr_maxsz + 5)
122 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
123 1 + nfs4_name_maxsz + \
124 nfs4_path_maxsz + \
125 nfs4_fattr_bitmap_maxsz)
126 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
127 #define encode_create_maxsz (op_encode_hdr_maxsz + \
128 2 + nfs4_name_maxsz + \
129 nfs4_fattr_bitmap_maxsz)
130 #define decode_create_maxsz (op_decode_hdr_maxsz + 8)
131 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
132 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
133 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
134 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
135 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
136 encode_putfh_maxsz + \
137 op_encode_hdr_maxsz + 7)
138 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
139 decode_putfh_maxsz + \
140 op_decode_hdr_maxsz + 2)
141 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
142 encode_putfh_maxsz + \
143 op_encode_hdr_maxsz)
144 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
145 decode_putfh_maxsz + \
146 op_decode_hdr_maxsz)
147 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
148 encode_putfh_maxsz + \
149 op_encode_hdr_maxsz + 9)
150 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
151 decode_putfh_maxsz + \
152 op_decode_hdr_maxsz + 2)
153 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
154 encode_putfh_maxsz + \
155 op_encode_hdr_maxsz + 8)
156 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
157 decode_putfh_maxsz + \
158 op_decode_hdr_maxsz + 4)
159 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
160 encode_putfh_maxsz + \
161 op_encode_hdr_maxsz + 3)
162 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
163 decode_putfh_maxsz + \
164 op_decode_hdr_maxsz + 2)
165 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
166 encode_putfh_maxsz + \
167 op_encode_hdr_maxsz + \
168 13 + 3 + 2 + 64 + \
169 encode_getattr_maxsz + \
170 encode_getfh_maxsz)
171 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
172 decode_putfh_maxsz + \
173 op_decode_hdr_maxsz + 4 + 5 + 2 + 3 + \
174 decode_getattr_maxsz + \
175 decode_getfh_maxsz)
176 #define NFS4_enc_open_confirm_sz \
177 (compound_encode_hdr_maxsz + \
178 encode_putfh_maxsz + \
179 op_encode_hdr_maxsz + 5)
180 #define NFS4_dec_open_confirm_sz (compound_decode_hdr_maxsz + \
181 decode_putfh_maxsz + \
182 op_decode_hdr_maxsz + 4)
183 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
184 encode_putfh_maxsz + \
185 op_encode_hdr_maxsz + \
186 11)
187 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
188 decode_putfh_maxsz + \
189 op_decode_hdr_maxsz + \
190 4 + 5 + 2 + 3)
191 #define NFS4_enc_open_downgrade_sz \
192 (compound_encode_hdr_maxsz + \
193 encode_putfh_maxsz + \
194 op_encode_hdr_maxsz + 7)
195 #define NFS4_dec_open_downgrade_sz \
196 (compound_decode_hdr_maxsz + \
197 decode_putfh_maxsz + \
198 op_decode_hdr_maxsz + 4)
199 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
200 encode_putfh_maxsz + \
201 op_encode_hdr_maxsz + 5)
202 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
203 decode_putfh_maxsz + \
204 op_decode_hdr_maxsz + 4)
205 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
206 encode_putfh_maxsz + \
207 op_encode_hdr_maxsz + 4 + \
208 nfs4_fattr_bitmap_maxsz + \
209 encode_getattr_maxsz)
210 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
211 decode_putfh_maxsz + \
212 op_decode_hdr_maxsz + 3)
213 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
214 encode_putfh_maxsz + \
215 encode_fsinfo_maxsz)
216 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
217 decode_putfh_maxsz + \
218 decode_fsinfo_maxsz)
219 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
220 encode_renew_maxsz)
221 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
222 decode_renew_maxsz)
223 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
224 encode_setclientid_maxsz)
225 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
226 decode_setclientid_maxsz)
227 #define NFS4_enc_setclientid_confirm_sz \
228 (compound_encode_hdr_maxsz + \
229 encode_setclientid_confirm_maxsz + \
230 encode_putrootfh_maxsz + \
231 encode_fsinfo_maxsz)
232 #define NFS4_dec_setclientid_confirm_sz \
233 (compound_decode_hdr_maxsz + \
234 decode_setclientid_confirm_maxsz + \
235 decode_putrootfh_maxsz + \
236 decode_fsinfo_maxsz)
237 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
238 encode_putfh_maxsz + \
239 encode_getattr_maxsz + \
240 op_encode_hdr_maxsz + \
241 1 + 1 + 2 + 2 + \
242 1 + 4 + 1 + 2 + \
243 owner_id_maxsz)
244 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
245 decode_putfh_maxsz + \
246 decode_getattr_maxsz + \
247 op_decode_hdr_maxsz + \
248 2 + 2 + 1 + 2 + \
249 owner_id_maxsz)
250 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
251 encode_putfh_maxsz + \
252 encode_getattr_maxsz + \
253 op_encode_hdr_maxsz + \
254 1 + 2 + 2 + 2 + \
255 owner_id_maxsz)
256 #define NFS4_dec_lockt_sz (NFS4_dec_lock_sz)
257 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
258 encode_putfh_maxsz + \
259 encode_getattr_maxsz + \
260 op_encode_hdr_maxsz + \
261 1 + 1 + 4 + 2 + 2)
262 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
263 decode_putfh_maxsz + \
264 decode_getattr_maxsz + \
265 op_decode_hdr_maxsz + 4)
266 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
267 encode_putfh_maxsz + \
268 op_encode_hdr_maxsz + 1)
269 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
270 decode_putfh_maxsz + \
271 op_decode_hdr_maxsz + 2)
272 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
273 encode_putfh_maxsz + \
274 encode_getattr_maxsz)
275 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
276 decode_putfh_maxsz + \
277 decode_getattr_maxsz)
278 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
279 encode_putfh_maxsz + \
280 encode_lookup_maxsz + \
281 encode_getattr_maxsz + \
282 encode_getfh_maxsz)
283 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
284 decode_putfh_maxsz + \
285 op_decode_hdr_maxsz + \
286 decode_getattr_maxsz + \
287 decode_getfh_maxsz)
288 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
289 encode_putrootfh_maxsz + \
290 encode_getattr_maxsz + \
291 encode_getfh_maxsz)
292 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
293 decode_putrootfh_maxsz + \
294 decode_getattr_maxsz + \
295 decode_getfh_maxsz)
296 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
297 encode_putfh_maxsz + \
298 encode_remove_maxsz)
299 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
300 decode_putfh_maxsz + \
301 op_decode_hdr_maxsz + 5)
302 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
303 encode_putfh_maxsz + \
304 encode_savefh_maxsz + \
305 encode_putfh_maxsz + \
306 encode_rename_maxsz)
307 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
308 decode_putfh_maxsz + \
309 decode_savefh_maxsz + \
310 decode_putfh_maxsz + \
311 decode_rename_maxsz)
312 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
313 encode_putfh_maxsz + \
314 encode_savefh_maxsz + \
315 encode_putfh_maxsz + \
316 encode_link_maxsz)
317 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
318 decode_putfh_maxsz + \
319 decode_savefh_maxsz + \
320 decode_putfh_maxsz + \
321 decode_link_maxsz)
322 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
323 encode_putfh_maxsz + \
324 encode_symlink_maxsz + \
325 encode_getattr_maxsz + \
326 encode_getfh_maxsz)
327 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
328 decode_putfh_maxsz + \
329 decode_symlink_maxsz + \
330 decode_getattr_maxsz + \
331 decode_getfh_maxsz)
332 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
333 encode_putfh_maxsz + \
334 encode_create_maxsz + \
335 encode_getattr_maxsz + \
336 encode_getfh_maxsz)
337 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
338 decode_putfh_maxsz + \
339 decode_create_maxsz + \
340 decode_getattr_maxsz + \
341 decode_getfh_maxsz)
342 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
343 encode_putfh_maxsz + \
344 encode_getattr_maxsz)
345 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
346 decode_putfh_maxsz + \
347 decode_getattr_maxsz)
348 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
349 encode_putfh_maxsz + \
350 encode_getattr_maxsz)
351 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
352 decode_putfh_maxsz + \
353 op_decode_hdr_maxsz + 12)
354 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
355 encode_getattr_maxsz)
356 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
357 decode_getattr_maxsz)
358 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
359 encode_putfh_maxsz + \
360 encode_delegreturn_maxsz)
361 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
362 decode_delegreturn_maxsz)
363
364 static struct {
365 unsigned int mode;
366 unsigned int nfs2type;
367 } nfs_type2fmt[] = {
368 { 0, NFNON },
369 { S_IFREG, NFREG },
370 { S_IFDIR, NFDIR },
371 { S_IFBLK, NFBLK },
372 { S_IFCHR, NFCHR },
373 { S_IFLNK, NFLNK },
374 { S_IFSOCK, NFSOCK },
375 { S_IFIFO, NFFIFO },
376 { 0, NFNON },
377 { 0, NFNON },
378 };
379
380 struct compound_hdr {
381 int32_t status;
382 uint32_t nops;
383 uint32_t taglen;
384 char * tag;
385 };
386
387 /*
388 * START OF "GENERIC" ENCODE ROUTINES.
389 * These may look a little ugly since they are imported from a "generic"
390 * set of XDR encode/decode routines which are intended to be shared by
391 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
392 *
393 * If the pain of reading these is too great, it should be a straightforward
394 * task to translate them into Linux-specific versions which are more
395 * consistent with the style used in NFSv2/v3...
396 */
397 #define WRITE32(n) *p++ = htonl(n)
398 #define WRITE64(n) do { \
399 *p++ = htonl((uint32_t)((n) >> 32)); \
400 *p++ = htonl((uint32_t)(n)); \
401 } while (0)
402 #define WRITEMEM(ptr,nbytes) do { \
403 p = xdr_encode_opaque_fixed(p, ptr, nbytes); \
404 } while (0)
405
406 #define RESERVE_SPACE(nbytes) do { \
407 p = xdr_reserve_space(xdr, nbytes); \
408 if (!p) printk("RESERVE_SPACE(%d) failed in function %s\n", (int) (nbytes), __FUNCTION__); \
409 BUG_ON(!p); \
410 } while (0)
411
412 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
413 {
414 uint32_t *p;
415
416 p = xdr_reserve_space(xdr, 4 + len);
417 BUG_ON(p == NULL);
418 xdr_encode_opaque(p, str, len);
419 }
420
421 static int encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
422 {
423 uint32_t *p;
424
425 dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
426 BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
427 RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
428 WRITE32(hdr->taglen);
429 WRITEMEM(hdr->tag, hdr->taglen);
430 WRITE32(NFS4_MINOR_VERSION);
431 WRITE32(hdr->nops);
432 return 0;
433 }
434
435 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
436 {
437 uint32_t *p;
438
439 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
440 BUG_ON(p == NULL);
441 xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
442 }
443
444 static int encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
445 {
446 char owner_name[IDMAP_NAMESZ];
447 char owner_group[IDMAP_NAMESZ];
448 int owner_namelen = 0;
449 int owner_grouplen = 0;
450 uint32_t *p;
451 uint32_t *q;
452 int len;
453 uint32_t bmval0 = 0;
454 uint32_t bmval1 = 0;
455 int status;
456
457 /*
458 * We reserve enough space to write the entire attribute buffer at once.
459 * In the worst-case, this would be
460 * 12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
461 * = 36 bytes, plus any contribution from variable-length fields
462 * such as owner/group/acl's.
463 */
464 len = 16;
465
466 /* Sigh */
467 if (iap->ia_valid & ATTR_SIZE)
468 len += 8;
469 if (iap->ia_valid & ATTR_MODE)
470 len += 4;
471 if (iap->ia_valid & ATTR_UID) {
472 owner_namelen = nfs_map_uid_to_name(server->nfs4_state, iap->ia_uid, owner_name);
473 if (owner_namelen < 0) {
474 printk(KERN_WARNING "nfs: couldn't resolve uid %d to string\n",
475 iap->ia_uid);
476 /* XXX */
477 strcpy(owner_name, "nobody");
478 owner_namelen = sizeof("nobody") - 1;
479 /* goto out; */
480 }
481 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
482 }
483 if (iap->ia_valid & ATTR_GID) {
484 owner_grouplen = nfs_map_gid_to_group(server->nfs4_state, iap->ia_gid, owner_group);
485 if (owner_grouplen < 0) {
486 printk(KERN_WARNING "nfs4: couldn't resolve gid %d to string\n",
487 iap->ia_gid);
488 strcpy(owner_group, "nobody");
489 owner_grouplen = sizeof("nobody") - 1;
490 /* goto out; */
491 }
492 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
493 }
494 if (iap->ia_valid & ATTR_ATIME_SET)
495 len += 16;
496 else if (iap->ia_valid & ATTR_ATIME)
497 len += 4;
498 if (iap->ia_valid & ATTR_MTIME_SET)
499 len += 16;
500 else if (iap->ia_valid & ATTR_MTIME)
501 len += 4;
502 RESERVE_SPACE(len);
503
504 /*
505 * We write the bitmap length now, but leave the bitmap and the attribute
506 * buffer length to be backfilled at the end of this routine.
507 */
508 WRITE32(2);
509 q = p;
510 p += 3;
511
512 if (iap->ia_valid & ATTR_SIZE) {
513 bmval0 |= FATTR4_WORD0_SIZE;
514 WRITE64(iap->ia_size);
515 }
516 if (iap->ia_valid & ATTR_MODE) {
517 bmval1 |= FATTR4_WORD1_MODE;
518 WRITE32(iap->ia_mode);
519 }
520 if (iap->ia_valid & ATTR_UID) {
521 bmval1 |= FATTR4_WORD1_OWNER;
522 WRITE32(owner_namelen);
523 WRITEMEM(owner_name, owner_namelen);
524 }
525 if (iap->ia_valid & ATTR_GID) {
526 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
527 WRITE32(owner_grouplen);
528 WRITEMEM(owner_group, owner_grouplen);
529 }
530 if (iap->ia_valid & ATTR_ATIME_SET) {
531 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
532 WRITE32(NFS4_SET_TO_CLIENT_TIME);
533 WRITE32(0);
534 WRITE32(iap->ia_mtime.tv_sec);
535 WRITE32(iap->ia_mtime.tv_nsec);
536 }
537 else if (iap->ia_valid & ATTR_ATIME) {
538 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
539 WRITE32(NFS4_SET_TO_SERVER_TIME);
540 }
541 if (iap->ia_valid & ATTR_MTIME_SET) {
542 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
543 WRITE32(NFS4_SET_TO_CLIENT_TIME);
544 WRITE32(0);
545 WRITE32(iap->ia_mtime.tv_sec);
546 WRITE32(iap->ia_mtime.tv_nsec);
547 }
548 else if (iap->ia_valid & ATTR_MTIME) {
549 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
550 WRITE32(NFS4_SET_TO_SERVER_TIME);
551 }
552
553 /*
554 * Now we backfill the bitmap and the attribute buffer length.
555 */
556 if (len != ((char *)p - (char *)q) + 4) {
557 printk ("encode_attr: Attr length calculation error! %u != %Zu\n",
558 len, ((char *)p - (char *)q) + 4);
559 BUG();
560 }
561 len = (char *)p - (char *)q - 12;
562 *q++ = htonl(bmval0);
563 *q++ = htonl(bmval1);
564 *q++ = htonl(len);
565
566 status = 0;
567 /* out: */
568 return status;
569 }
570
571 static int encode_access(struct xdr_stream *xdr, u32 access)
572 {
573 uint32_t *p;
574
575 RESERVE_SPACE(8);
576 WRITE32(OP_ACCESS);
577 WRITE32(access);
578
579 return 0;
580 }
581
582 static int encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
583 {
584 uint32_t *p;
585
586 RESERVE_SPACE(8+sizeof(arg->stateid.data));
587 WRITE32(OP_CLOSE);
588 WRITE32(arg->seqid);
589 WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
590
591 return 0;
592 }
593
594 static int encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args)
595 {
596 uint32_t *p;
597
598 RESERVE_SPACE(16);
599 WRITE32(OP_COMMIT);
600 WRITE64(args->offset);
601 WRITE32(args->count);
602
603 return 0;
604 }
605
606 static int encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create)
607 {
608 uint32_t *p;
609
610 RESERVE_SPACE(8);
611 WRITE32(OP_CREATE);
612 WRITE32(create->ftype);
613
614 switch (create->ftype) {
615 case NF4LNK:
616 RESERVE_SPACE(4 + create->u.symlink->len);
617 WRITE32(create->u.symlink->len);
618 WRITEMEM(create->u.symlink->name, create->u.symlink->len);
619 break;
620
621 case NF4BLK: case NF4CHR:
622 RESERVE_SPACE(8);
623 WRITE32(create->u.device.specdata1);
624 WRITE32(create->u.device.specdata2);
625 break;
626
627 default:
628 break;
629 }
630
631 RESERVE_SPACE(4 + create->name->len);
632 WRITE32(create->name->len);
633 WRITEMEM(create->name->name, create->name->len);
634
635 return encode_attrs(xdr, create->attrs, create->server);
636 }
637
638 static int encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap)
639 {
640 uint32_t *p;
641
642 RESERVE_SPACE(12);
643 WRITE32(OP_GETATTR);
644 WRITE32(1);
645 WRITE32(bitmap);
646 return 0;
647 }
648
649 static int encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1)
650 {
651 uint32_t *p;
652
653 RESERVE_SPACE(16);
654 WRITE32(OP_GETATTR);
655 WRITE32(2);
656 WRITE32(bm0);
657 WRITE32(bm1);
658 return 0;
659 }
660
661 static int encode_getfattr(struct xdr_stream *xdr, const u32* bitmask)
662 {
663 extern u32 nfs4_fattr_bitmap[];
664
665 return encode_getattr_two(xdr,
666 bitmask[0] & nfs4_fattr_bitmap[0],
667 bitmask[1] & nfs4_fattr_bitmap[1]);
668 }
669
670 static int encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask)
671 {
672 extern u32 nfs4_fsinfo_bitmap[];
673
674 return encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
675 bitmask[1] & nfs4_fsinfo_bitmap[1]);
676 }
677
678 static int encode_getfh(struct xdr_stream *xdr)
679 {
680 uint32_t *p;
681
682 RESERVE_SPACE(4);
683 WRITE32(OP_GETFH);
684
685 return 0;
686 }
687
688 static int encode_link(struct xdr_stream *xdr, const struct qstr *name)
689 {
690 uint32_t *p;
691
692 RESERVE_SPACE(8 + name->len);
693 WRITE32(OP_LINK);
694 WRITE32(name->len);
695 WRITEMEM(name->name, name->len);
696
697 return 0;
698 }
699
700 /*
701 * opcode,type,reclaim,offset,length,new_lock_owner = 32
702 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
703 */
704 static int encode_lock(struct xdr_stream *xdr, const struct nfs_lockargs *arg)
705 {
706 uint32_t *p;
707 struct nfs_lock_opargs *opargs = arg->u.lock;
708
709 RESERVE_SPACE(32);
710 WRITE32(OP_LOCK);
711 WRITE32(arg->type);
712 WRITE32(opargs->reclaim);
713 WRITE64(arg->offset);
714 WRITE64(arg->length);
715 WRITE32(opargs->new_lock_owner);
716 if (opargs->new_lock_owner){
717 struct nfs_open_to_lock *ol = opargs->u.open_lock;
718
719 RESERVE_SPACE(40);
720 WRITE32(ol->open_seqid);
721 WRITEMEM(&ol->open_stateid, sizeof(ol->open_stateid));
722 WRITE32(ol->lock_seqid);
723 WRITE64(ol->lock_owner.clientid);
724 WRITE32(4);
725 WRITE32(ol->lock_owner.id);
726 }
727 else {
728 struct nfs_exist_lock *el = opargs->u.exist_lock;
729
730 RESERVE_SPACE(20);
731 WRITEMEM(&el->stateid, sizeof(el->stateid));
732 WRITE32(el->seqid);
733 }
734
735 return 0;
736 }
737
738 static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockargs *arg)
739 {
740 uint32_t *p;
741 struct nfs_lowner *opargs = arg->u.lockt;
742
743 RESERVE_SPACE(40);
744 WRITE32(OP_LOCKT);
745 WRITE32(arg->type);
746 WRITE64(arg->offset);
747 WRITE64(arg->length);
748 WRITE64(opargs->clientid);
749 WRITE32(4);
750 WRITE32(opargs->id);
751
752 return 0;
753 }
754
755 static int encode_locku(struct xdr_stream *xdr, const struct nfs_lockargs *arg)
756 {
757 uint32_t *p;
758 struct nfs_locku_opargs *opargs = arg->u.locku;
759
760 RESERVE_SPACE(44);
761 WRITE32(OP_LOCKU);
762 WRITE32(arg->type);
763 WRITE32(opargs->seqid);
764 WRITEMEM(&opargs->stateid, sizeof(opargs->stateid));
765 WRITE64(arg->offset);
766 WRITE64(arg->length);
767
768 return 0;
769 }
770
771 static int encode_lookup(struct xdr_stream *xdr, const struct qstr *name)
772 {
773 int len = name->len;
774 uint32_t *p;
775
776 RESERVE_SPACE(8 + len);
777 WRITE32(OP_LOOKUP);
778 WRITE32(len);
779 WRITEMEM(name->name, len);
780
781 return 0;
782 }
783
784 static void encode_share_access(struct xdr_stream *xdr, int open_flags)
785 {
786 uint32_t *p;
787
788 RESERVE_SPACE(8);
789 switch (open_flags & (FMODE_READ|FMODE_WRITE)) {
790 case FMODE_READ:
791 WRITE32(NFS4_SHARE_ACCESS_READ);
792 break;
793 case FMODE_WRITE:
794 WRITE32(NFS4_SHARE_ACCESS_WRITE);
795 break;
796 case FMODE_READ|FMODE_WRITE:
797 WRITE32(NFS4_SHARE_ACCESS_BOTH);
798 break;
799 default:
800 BUG();
801 }
802 WRITE32(0); /* for linux, share_deny = 0 always */
803 }
804
805 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
806 {
807 uint32_t *p;
808 /*
809 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
810 * owner 4 = 32
811 */
812 RESERVE_SPACE(8);
813 WRITE32(OP_OPEN);
814 WRITE32(arg->seqid);
815 encode_share_access(xdr, arg->open_flags);
816 RESERVE_SPACE(16);
817 WRITE64(arg->clientid);
818 WRITE32(4);
819 WRITE32(arg->id);
820 }
821
822 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
823 {
824 uint32_t *p;
825
826 RESERVE_SPACE(4);
827 switch(arg->open_flags & O_EXCL) {
828 case 0:
829 WRITE32(NFS4_CREATE_UNCHECKED);
830 encode_attrs(xdr, arg->u.attrs, arg->server);
831 break;
832 default:
833 WRITE32(NFS4_CREATE_EXCLUSIVE);
834 encode_nfs4_verifier(xdr, &arg->u.verifier);
835 }
836 }
837
838 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
839 {
840 uint32_t *p;
841
842 RESERVE_SPACE(4);
843 switch (arg->open_flags & O_CREAT) {
844 case 0:
845 WRITE32(NFS4_OPEN_NOCREATE);
846 break;
847 default:
848 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
849 WRITE32(NFS4_OPEN_CREATE);
850 encode_createmode(xdr, arg);
851 }
852 }
853
854 static inline void encode_delegation_type(struct xdr_stream *xdr, int delegation_type)
855 {
856 uint32_t *p;
857
858 RESERVE_SPACE(4);
859 switch (delegation_type) {
860 case 0:
861 WRITE32(NFS4_OPEN_DELEGATE_NONE);
862 break;
863 case FMODE_READ:
864 WRITE32(NFS4_OPEN_DELEGATE_READ);
865 break;
866 case FMODE_WRITE|FMODE_READ:
867 WRITE32(NFS4_OPEN_DELEGATE_WRITE);
868 break;
869 default:
870 BUG();
871 }
872 }
873
874 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
875 {
876 uint32_t *p;
877
878 RESERVE_SPACE(4);
879 WRITE32(NFS4_OPEN_CLAIM_NULL);
880 encode_string(xdr, name->len, name->name);
881 }
882
883 static inline void encode_claim_previous(struct xdr_stream *xdr, int type)
884 {
885 uint32_t *p;
886
887 RESERVE_SPACE(4);
888 WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
889 encode_delegation_type(xdr, type);
890 }
891
892 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
893 {
894 uint32_t *p;
895
896 RESERVE_SPACE(4+sizeof(stateid->data));
897 WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
898 WRITEMEM(stateid->data, sizeof(stateid->data));
899 encode_string(xdr, name->len, name->name);
900 }
901
902 static int encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg)
903 {
904 encode_openhdr(xdr, arg);
905 encode_opentype(xdr, arg);
906 switch (arg->claim) {
907 case NFS4_OPEN_CLAIM_NULL:
908 encode_claim_null(xdr, arg->name);
909 break;
910 case NFS4_OPEN_CLAIM_PREVIOUS:
911 encode_claim_previous(xdr, arg->u.delegation_type);
912 break;
913 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
914 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
915 break;
916 default:
917 BUG();
918 }
919 return 0;
920 }
921
922 static int encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg)
923 {
924 uint32_t *p;
925
926 RESERVE_SPACE(8+sizeof(arg->stateid.data));
927 WRITE32(OP_OPEN_CONFIRM);
928 WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
929 WRITE32(arg->seqid);
930
931 return 0;
932 }
933
934 static int encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
935 {
936 uint32_t *p;
937
938 RESERVE_SPACE(8+sizeof(arg->stateid.data));
939 WRITE32(OP_OPEN_DOWNGRADE);
940 WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
941 WRITE32(arg->seqid);
942 encode_share_access(xdr, arg->open_flags);
943 return 0;
944 }
945
946 static int
947 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh)
948 {
949 int len = fh->size;
950 uint32_t *p;
951
952 RESERVE_SPACE(8 + len);
953 WRITE32(OP_PUTFH);
954 WRITE32(len);
955 WRITEMEM(fh->data, len);
956
957 return 0;
958 }
959
960 static int encode_putrootfh(struct xdr_stream *xdr)
961 {
962 uint32_t *p;
963
964 RESERVE_SPACE(4);
965 WRITE32(OP_PUTROOTFH);
966
967 return 0;
968 }
969
970 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
971 {
972 extern nfs4_stateid zero_stateid;
973 nfs4_stateid stateid;
974 uint32_t *p;
975
976 RESERVE_SPACE(16);
977 if (ctx->state != NULL) {
978 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
979 WRITEMEM(stateid.data, sizeof(stateid.data));
980 } else
981 WRITEMEM(zero_stateid.data, sizeof(zero_stateid.data));
982 }
983
984 static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args)
985 {
986 uint32_t *p;
987
988 RESERVE_SPACE(4);
989 WRITE32(OP_READ);
990
991 encode_stateid(xdr, args->context);
992
993 RESERVE_SPACE(12);
994 WRITE64(args->offset);
995 WRITE32(args->count);
996
997 return 0;
998 }
999
1000 static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req)
1001 {
1002 struct rpc_auth *auth = req->rq_task->tk_auth;
1003 int replen;
1004 uint32_t *p;
1005
1006 RESERVE_SPACE(32+sizeof(nfs4_verifier));
1007 WRITE32(OP_READDIR);
1008 WRITE64(readdir->cookie);
1009 WRITEMEM(readdir->verifier.data, sizeof(readdir->verifier.data));
1010 WRITE32(readdir->count >> 1); /* We're not doing readdirplus */
1011 WRITE32(readdir->count);
1012 WRITE32(2);
1013 if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1014 WRITE32(0);
1015 WRITE32(FATTR4_WORD1_MOUNTED_ON_FILEID);
1016 } else {
1017 WRITE32(FATTR4_WORD0_FILEID);
1018 WRITE32(0);
1019 }
1020
1021 /* set up reply kvec
1022 * toplevel_status + taglen + rescount + OP_PUTFH + status
1023 * + OP_READDIR + status + verifer(2) = 9
1024 */
1025 replen = (RPC_REPHDRSIZE + auth->au_rslack + 9) << 2;
1026 xdr_inline_pages(&req->rq_rcv_buf, replen, readdir->pages,
1027 readdir->pgbase, readdir->count);
1028
1029 return 0;
1030 }
1031
1032 static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
1033 {
1034 struct rpc_auth *auth = req->rq_task->tk_auth;
1035 unsigned int replen;
1036 uint32_t *p;
1037
1038 RESERVE_SPACE(4);
1039 WRITE32(OP_READLINK);
1040
1041 /* set up reply kvec
1042 * toplevel_status + taglen + rescount + OP_PUTFH + status
1043 * + OP_READLINK + status + string length = 8
1044 */
1045 replen = (RPC_REPHDRSIZE + auth->au_rslack + 8) << 2;
1046 xdr_inline_pages(&req->rq_rcv_buf, replen, readlink->pages,
1047 readlink->pgbase, readlink->pglen);
1048
1049 return 0;
1050 }
1051
1052 static int encode_remove(struct xdr_stream *xdr, const struct qstr *name)
1053 {
1054 uint32_t *p;
1055
1056 RESERVE_SPACE(8 + name->len);
1057 WRITE32(OP_REMOVE);
1058 WRITE32(name->len);
1059 WRITEMEM(name->name, name->len);
1060
1061 return 0;
1062 }
1063
1064 static int encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname)
1065 {
1066 uint32_t *p;
1067
1068 RESERVE_SPACE(8 + oldname->len);
1069 WRITE32(OP_RENAME);
1070 WRITE32(oldname->len);
1071 WRITEMEM(oldname->name, oldname->len);
1072
1073 RESERVE_SPACE(4 + newname->len);
1074 WRITE32(newname->len);
1075 WRITEMEM(newname->name, newname->len);
1076
1077 return 0;
1078 }
1079
1080 static int encode_renew(struct xdr_stream *xdr, const struct nfs4_client *client_stateid)
1081 {
1082 uint32_t *p;
1083
1084 RESERVE_SPACE(12);
1085 WRITE32(OP_RENEW);
1086 WRITE64(client_stateid->cl_clientid);
1087
1088 return 0;
1089 }
1090
1091 static int
1092 encode_savefh(struct xdr_stream *xdr)
1093 {
1094 uint32_t *p;
1095
1096 RESERVE_SPACE(4);
1097 WRITE32(OP_SAVEFH);
1098
1099 return 0;
1100 }
1101
1102 static int encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server)
1103 {
1104 int status;
1105 uint32_t *p;
1106
1107 RESERVE_SPACE(4+sizeof(arg->stateid.data));
1108 WRITE32(OP_SETATTR);
1109 WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
1110
1111 if ((status = encode_attrs(xdr, arg->iap, server)))
1112 return status;
1113
1114 return 0;
1115 }
1116
1117 static int encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid)
1118 {
1119 uint32_t *p;
1120
1121 RESERVE_SPACE(4 + sizeof(setclientid->sc_verifier->data));
1122 WRITE32(OP_SETCLIENTID);
1123 WRITEMEM(setclientid->sc_verifier->data, sizeof(setclientid->sc_verifier->data));
1124
1125 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1126 RESERVE_SPACE(4);
1127 WRITE32(setclientid->sc_prog);
1128 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1129 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1130 RESERVE_SPACE(4);
1131 WRITE32(setclientid->sc_cb_ident);
1132
1133 return 0;
1134 }
1135
1136 static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_client *client_state)
1137 {
1138 uint32_t *p;
1139
1140 RESERVE_SPACE(12 + sizeof(client_state->cl_confirm.data));
1141 WRITE32(OP_SETCLIENTID_CONFIRM);
1142 WRITE64(client_state->cl_clientid);
1143 WRITEMEM(client_state->cl_confirm.data, sizeof(client_state->cl_confirm.data));
1144
1145 return 0;
1146 }
1147
1148 static int encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args)
1149 {
1150 uint32_t *p;
1151
1152 RESERVE_SPACE(4);
1153 WRITE32(OP_WRITE);
1154
1155 encode_stateid(xdr, args->context);
1156
1157 RESERVE_SPACE(16);
1158 WRITE64(args->offset);
1159 WRITE32(args->stable);
1160 WRITE32(args->count);
1161
1162 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1163
1164 return 0;
1165 }
1166
1167 static int encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1168 {
1169 uint32_t *p;
1170
1171 RESERVE_SPACE(20);
1172
1173 WRITE32(OP_DELEGRETURN);
1174 WRITEMEM(stateid->data, sizeof(stateid->data));
1175 return 0;
1176
1177 }
1178 /*
1179 * END OF "GENERIC" ENCODE ROUTINES.
1180 */
1181
1182 /*
1183 * Encode an ACCESS request
1184 */
1185 static int nfs4_xdr_enc_access(struct rpc_rqst *req, uint32_t *p, const struct nfs4_accessargs *args)
1186 {
1187 struct xdr_stream xdr;
1188 struct compound_hdr hdr = {
1189 .nops = 2,
1190 };
1191 int status;
1192
1193 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1194 encode_compound_hdr(&xdr, &hdr);
1195 if ((status = encode_putfh(&xdr, args->fh)) == 0)
1196 status = encode_access(&xdr, args->access);
1197 return status;
1198 }
1199
1200 /*
1201 * Encode LOOKUP request
1202 */
1203 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, uint32_t *p, const struct nfs4_lookup_arg *args)
1204 {
1205 struct xdr_stream xdr;
1206 struct compound_hdr hdr = {
1207 .nops = 4,
1208 };
1209 int status;
1210
1211 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1212 encode_compound_hdr(&xdr, &hdr);
1213 if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1214 goto out;
1215 if ((status = encode_lookup(&xdr, args->name)) != 0)
1216 goto out;
1217 if ((status = encode_getfh(&xdr)) != 0)
1218 goto out;
1219 status = encode_getfattr(&xdr, args->bitmask);
1220 out:
1221 return status;
1222 }
1223
1224 /*
1225 * Encode LOOKUP_ROOT request
1226 */
1227 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, uint32_t *p, const struct nfs4_lookup_root_arg *args)
1228 {
1229 struct xdr_stream xdr;
1230 struct compound_hdr hdr = {
1231 .nops = 3,
1232 };
1233 int status;
1234
1235 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1236 encode_compound_hdr(&xdr, &hdr);
1237 if ((status = encode_putrootfh(&xdr)) != 0)
1238 goto out;
1239 if ((status = encode_getfh(&xdr)) == 0)
1240 status = encode_getfattr(&xdr, args->bitmask);
1241 out:
1242 return status;
1243 }
1244
1245 /*
1246 * Encode REMOVE request
1247 */
1248 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, uint32_t *p, const struct nfs4_remove_arg *args)
1249 {
1250 struct xdr_stream xdr;
1251 struct compound_hdr hdr = {
1252 .nops = 2,
1253 };
1254 int status;
1255
1256 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1257 encode_compound_hdr(&xdr, &hdr);
1258 if ((status = encode_putfh(&xdr, args->fh)) == 0)
1259 status = encode_remove(&xdr, args->name);
1260 return status;
1261 }
1262
1263 /*
1264 * Encode RENAME request
1265 */
1266 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, uint32_t *p, const struct nfs4_rename_arg *args)
1267 {
1268 struct xdr_stream xdr;
1269 struct compound_hdr hdr = {
1270 .nops = 4,
1271 };
1272 int status;
1273
1274 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1275 encode_compound_hdr(&xdr, &hdr);
1276 if ((status = encode_putfh(&xdr, args->old_dir)) != 0)
1277 goto out;
1278 if ((status = encode_savefh(&xdr)) != 0)
1279 goto out;
1280 if ((status = encode_putfh(&xdr, args->new_dir)) != 0)
1281 goto out;
1282 status = encode_rename(&xdr, args->old_name, args->new_name);
1283 out:
1284 return status;
1285 }
1286
1287 /*
1288 * Encode LINK request
1289 */
1290 static int nfs4_xdr_enc_link(struct rpc_rqst *req, uint32_t *p, const struct nfs4_link_arg *args)
1291 {
1292 struct xdr_stream xdr;
1293 struct compound_hdr hdr = {
1294 .nops = 4,
1295 };
1296 int status;
1297
1298 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1299 encode_compound_hdr(&xdr, &hdr);
1300 if ((status = encode_putfh(&xdr, args->fh)) != 0)
1301 goto out;
1302 if ((status = encode_savefh(&xdr)) != 0)
1303 goto out;
1304 if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1305 goto out;
1306 status = encode_link(&xdr, args->name);
1307 out:
1308 return status;
1309 }
1310
1311 /*
1312 * Encode CREATE request
1313 */
1314 static int nfs4_xdr_enc_create(struct rpc_rqst *req, uint32_t *p, const struct nfs4_create_arg *args)
1315 {
1316 struct xdr_stream xdr;
1317 struct compound_hdr hdr = {
1318 .nops = 4,
1319 };
1320 int status;
1321
1322 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1323 encode_compound_hdr(&xdr, &hdr);
1324 if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1325 goto out;
1326 if ((status = encode_create(&xdr, args)) != 0)
1327 goto out;
1328 if ((status = encode_getfh(&xdr)) != 0)
1329 goto out;
1330 status = encode_getfattr(&xdr, args->bitmask);
1331 out:
1332 return status;
1333 }
1334
1335 /*
1336 * Encode SYMLINK request
1337 */
1338 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, uint32_t *p, const struct nfs4_create_arg *args)
1339 {
1340 return nfs4_xdr_enc_create(req, p, args);
1341 }
1342
1343 /*
1344 * Encode GETATTR request
1345 */
1346 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, uint32_t *p, const struct nfs4_getattr_arg *args)
1347 {
1348 struct xdr_stream xdr;
1349 struct compound_hdr hdr = {
1350 .nops = 2,
1351 };
1352 int status;
1353
1354 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1355 encode_compound_hdr(&xdr, &hdr);
1356 if ((status = encode_putfh(&xdr, args->fh)) == 0)
1357 status = encode_getfattr(&xdr, args->bitmask);
1358 return status;
1359 }
1360
1361 /*
1362 * Encode a CLOSE request
1363 */
1364 static int nfs4_xdr_enc_close(struct rpc_rqst *req, uint32_t *p, struct nfs_closeargs *args)
1365 {
1366 struct xdr_stream xdr;
1367 struct compound_hdr hdr = {
1368 .nops = 2,
1369 };
1370 int status;
1371
1372 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1373 encode_compound_hdr(&xdr, &hdr);
1374 status = encode_putfh(&xdr, args->fh);
1375 if(status)
1376 goto out;
1377 status = encode_close(&xdr, args);
1378 out:
1379 return status;
1380 }
1381
1382 /*
1383 * Encode an OPEN request
1384 */
1385 static int nfs4_xdr_enc_open(struct rpc_rqst *req, uint32_t *p, struct nfs_openargs *args)
1386 {
1387 struct xdr_stream xdr;
1388 struct compound_hdr hdr = {
1389 .nops = 4,
1390 };
1391 int status;
1392
1393 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1394 encode_compound_hdr(&xdr, &hdr);
1395 status = encode_putfh(&xdr, args->fh);
1396 if (status)
1397 goto out;
1398 status = encode_open(&xdr, args);
1399 if (status)
1400 goto out;
1401 status = encode_getfh(&xdr);
1402 if (status)
1403 goto out;
1404 status = encode_getfattr(&xdr, args->bitmask);
1405 out:
1406 return status;
1407 }
1408
1409 /*
1410 * Encode an OPEN_CONFIRM request
1411 */
1412 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_open_confirmargs *args)
1413 {
1414 struct xdr_stream xdr;
1415 struct compound_hdr hdr = {
1416 .nops = 2,
1417 };
1418 int status;
1419
1420 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1421 encode_compound_hdr(&xdr, &hdr);
1422 status = encode_putfh(&xdr, args->fh);
1423 if(status)
1424 goto out;
1425 status = encode_open_confirm(&xdr, args);
1426 out:
1427 return status;
1428 }
1429
1430 /*
1431 * Encode an OPEN request with no attributes.
1432 */
1433 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, uint32_t *p, struct nfs_openargs *args)
1434 {
1435 struct xdr_stream xdr;
1436 struct compound_hdr hdr = {
1437 .nops = 2,
1438 };
1439 int status;
1440
1441 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1442 encode_compound_hdr(&xdr, &hdr);
1443 status = encode_putfh(&xdr, args->fh);
1444 if (status)
1445 goto out;
1446 status = encode_open(&xdr, args);
1447 out:
1448 return status;
1449 }
1450
1451 /*
1452 * Encode an OPEN_DOWNGRADE request
1453 */
1454 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, uint32_t *p, struct nfs_closeargs *args)
1455 {
1456 struct xdr_stream xdr;
1457 struct compound_hdr hdr = {
1458 .nops = 2,
1459 };
1460 int status;
1461
1462 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1463 encode_compound_hdr(&xdr, &hdr);
1464 status = encode_putfh(&xdr, args->fh);
1465 if (status)
1466 goto out;
1467 status = encode_open_downgrade(&xdr, args);
1468 out:
1469 return status;
1470 }
1471
1472 /*
1473 * Encode a LOCK request
1474 */
1475 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, uint32_t *p, struct nfs_lockargs *args)
1476 {
1477 struct xdr_stream xdr;
1478 struct compound_hdr hdr = {
1479 .nops = 2,
1480 };
1481 int status;
1482
1483 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1484 encode_compound_hdr(&xdr, &hdr);
1485 status = encode_putfh(&xdr, args->fh);
1486 if(status)
1487 goto out;
1488 status = encode_lock(&xdr, args);
1489 out:
1490 return status;
1491 }
1492
1493 /*
1494 * Encode a LOCKT request
1495 */
1496 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, uint32_t *p, struct nfs_lockargs *args)
1497 {
1498 struct xdr_stream xdr;
1499 struct compound_hdr hdr = {
1500 .nops = 2,
1501 };
1502 int status;
1503
1504 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1505 encode_compound_hdr(&xdr, &hdr);
1506 status = encode_putfh(&xdr, args->fh);
1507 if(status)
1508 goto out;
1509 status = encode_lockt(&xdr, args);
1510 out:
1511 return status;
1512 }
1513
1514 /*
1515 * Encode a LOCKU request
1516 */
1517 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, uint32_t *p, struct nfs_lockargs *args)
1518 {
1519 struct xdr_stream xdr;
1520 struct compound_hdr hdr = {
1521 .nops = 2,
1522 };
1523 int status;
1524
1525 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1526 encode_compound_hdr(&xdr, &hdr);
1527 status = encode_putfh(&xdr, args->fh);
1528 if(status)
1529 goto out;
1530 status = encode_locku(&xdr, args);
1531 out:
1532 return status;
1533 }
1534
1535 /*
1536 * Encode a READLINK request
1537 */
1538 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, uint32_t *p, const struct nfs4_readlink *args)
1539 {
1540 struct xdr_stream xdr;
1541 struct compound_hdr hdr = {
1542 .nops = 2,
1543 };
1544 int status;
1545
1546 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1547 encode_compound_hdr(&xdr, &hdr);
1548 status = encode_putfh(&xdr, args->fh);
1549 if(status)
1550 goto out;
1551 status = encode_readlink(&xdr, args, req);
1552 out:
1553 return status;
1554 }
1555
1556 /*
1557 * Encode a READDIR request
1558 */
1559 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, uint32_t *p, const struct nfs4_readdir_arg *args)
1560 {
1561 struct xdr_stream xdr;
1562 struct compound_hdr hdr = {
1563 .nops = 2,
1564 };
1565 int status;
1566
1567 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1568 encode_compound_hdr(&xdr, &hdr);
1569 status = encode_putfh(&xdr, args->fh);
1570 if(status)
1571 goto out;
1572 status = encode_readdir(&xdr, args, req);
1573 out:
1574 return status;
1575 }
1576
1577 /*
1578 * Encode a READ request
1579 */
1580 static int nfs4_xdr_enc_read(struct rpc_rqst *req, uint32_t *p, struct nfs_readargs *args)
1581 {
1582 struct rpc_auth *auth = req->rq_task->tk_auth;
1583 struct xdr_stream xdr;
1584 struct compound_hdr hdr = {
1585 .nops = 2,
1586 };
1587 int replen, status;
1588
1589 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1590 encode_compound_hdr(&xdr, &hdr);
1591 status = encode_putfh(&xdr, args->fh);
1592 if (status)
1593 goto out;
1594 status = encode_read(&xdr, args);
1595 if (status)
1596 goto out;
1597
1598 /* set up reply kvec
1599 * toplevel status + taglen=0 + rescount + OP_PUTFH + status
1600 * + OP_READ + status + eof + datalen = 9
1601 */
1602 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1603 xdr_inline_pages(&req->rq_rcv_buf, replen,
1604 args->pages, args->pgbase, args->count);
1605 out:
1606 return status;
1607 }
1608
1609 /*
1610 * Encode an SETATTR request
1611 */
1612 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, uint32_t *p, struct nfs_setattrargs *args)
1613
1614 {
1615 struct xdr_stream xdr;
1616 struct compound_hdr hdr = {
1617 .nops = 3,
1618 };
1619 int status;
1620
1621 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1622 encode_compound_hdr(&xdr, &hdr);
1623 status = encode_putfh(&xdr, args->fh);
1624 if(status)
1625 goto out;
1626 status = encode_setattr(&xdr, args, args->server);
1627 if(status)
1628 goto out;
1629 status = encode_getfattr(&xdr, args->bitmask);
1630 out:
1631 return status;
1632 }
1633
1634 /*
1635 * Encode a WRITE request
1636 */
1637 static int nfs4_xdr_enc_write(struct rpc_rqst *req, uint32_t *p, struct nfs_writeargs *args)
1638 {
1639 struct xdr_stream xdr;
1640 struct compound_hdr hdr = {
1641 .nops = 2,
1642 };
1643 int status;
1644
1645 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1646 encode_compound_hdr(&xdr, &hdr);
1647 status = encode_putfh(&xdr, args->fh);
1648 if (status)
1649 goto out;
1650 status = encode_write(&xdr, args);
1651 out:
1652 return status;
1653 }
1654
1655 /*
1656 * a COMMIT request
1657 */
1658 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, uint32_t *p, struct nfs_writeargs *args)
1659 {
1660 struct xdr_stream xdr;
1661 struct compound_hdr hdr = {
1662 .nops = 2,
1663 };
1664 int status;
1665
1666 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1667 encode_compound_hdr(&xdr, &hdr);
1668 status = encode_putfh(&xdr, args->fh);
1669 if (status)
1670 goto out;
1671 status = encode_commit(&xdr, args);
1672 out:
1673 return status;
1674 }
1675
1676 /*
1677 * FSINFO request
1678 */
1679 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs4_fsinfo_arg *args)
1680 {
1681 struct xdr_stream xdr;
1682 struct compound_hdr hdr = {
1683 .nops = 2,
1684 };
1685 int status;
1686
1687 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1688 encode_compound_hdr(&xdr, &hdr);
1689 status = encode_putfh(&xdr, args->fh);
1690 if (!status)
1691 status = encode_fsinfo(&xdr, args->bitmask);
1692 return status;
1693 }
1694
1695 /*
1696 * a PATHCONF request
1697 */
1698 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, uint32_t *p, const struct nfs4_pathconf_arg *args)
1699 {
1700 extern u32 nfs4_pathconf_bitmap[2];
1701 struct xdr_stream xdr;
1702 struct compound_hdr hdr = {
1703 .nops = 2,
1704 };
1705 int status;
1706
1707 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1708 encode_compound_hdr(&xdr, &hdr);
1709 status = encode_putfh(&xdr, args->fh);
1710 if (!status)
1711 status = encode_getattr_one(&xdr,
1712 args->bitmask[0] & nfs4_pathconf_bitmap[0]);
1713 return status;
1714 }
1715
1716 /*
1717 * a STATFS request
1718 */
1719 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, uint32_t *p, const struct nfs4_statfs_arg *args)
1720 {
1721 extern u32 nfs4_statfs_bitmap[];
1722 struct xdr_stream xdr;
1723 struct compound_hdr hdr = {
1724 .nops = 2,
1725 };
1726 int status;
1727
1728 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1729 encode_compound_hdr(&xdr, &hdr);
1730 status = encode_putfh(&xdr, args->fh);
1731 if (status == 0)
1732 status = encode_getattr_two(&xdr,
1733 args->bitmask[0] & nfs4_statfs_bitmap[0],
1734 args->bitmask[1] & nfs4_statfs_bitmap[1]);
1735 return status;
1736 }
1737
1738 /*
1739 * GETATTR_BITMAP request
1740 */
1741 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, uint32_t *p, const struct nfs_fh *fhandle)
1742 {
1743 struct xdr_stream xdr;
1744 struct compound_hdr hdr = {
1745 .nops = 2,
1746 };
1747 int status;
1748
1749 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1750 encode_compound_hdr(&xdr, &hdr);
1751 status = encode_putfh(&xdr, fhandle);
1752 if (status == 0)
1753 status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
1754 FATTR4_WORD0_LINK_SUPPORT|
1755 FATTR4_WORD0_SYMLINK_SUPPORT|
1756 FATTR4_WORD0_ACLSUPPORT);
1757 return status;
1758 }
1759
1760 /*
1761 * a RENEW request
1762 */
1763 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, uint32_t *p, struct nfs4_client *clp)
1764 {
1765 struct xdr_stream xdr;
1766 struct compound_hdr hdr = {
1767 .nops = 1,
1768 };
1769
1770 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1771 encode_compound_hdr(&xdr, &hdr);
1772 return encode_renew(&xdr, clp);
1773 }
1774
1775 /*
1776 * a SETCLIENTID request
1777 */
1778 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, uint32_t *p, struct nfs4_setclientid *sc)
1779 {
1780 struct xdr_stream xdr;
1781 struct compound_hdr hdr = {
1782 .nops = 1,
1783 };
1784
1785 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1786 encode_compound_hdr(&xdr, &hdr);
1787 return encode_setclientid(&xdr, sc);
1788 }
1789
1790 /*
1791 * a SETCLIENTID_CONFIRM request
1792 */
1793 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs4_client *clp)
1794 {
1795 struct xdr_stream xdr;
1796 struct compound_hdr hdr = {
1797 .nops = 3,
1798 };
1799 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
1800 int status;
1801
1802 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1803 encode_compound_hdr(&xdr, &hdr);
1804 status = encode_setclientid_confirm(&xdr, clp);
1805 if (!status)
1806 status = encode_putrootfh(&xdr);
1807 if (!status)
1808 status = encode_fsinfo(&xdr, lease_bitmap);
1809 return status;
1810 }
1811
1812 /*
1813 * DELEGRETURN request
1814 */
1815 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, uint32_t *p, const struct nfs4_delegreturnargs *args)
1816 {
1817 struct xdr_stream xdr;
1818 struct compound_hdr hdr = {
1819 .nops = 2,
1820 };
1821 int status;
1822
1823 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1824 encode_compound_hdr(&xdr, &hdr);
1825 if ((status = encode_putfh(&xdr, args->fhandle)) == 0)
1826 status = encode_delegreturn(&xdr, args->stateid);
1827 return status;
1828 }
1829
1830 /*
1831 * START OF "GENERIC" DECODE ROUTINES.
1832 * These may look a little ugly since they are imported from a "generic"
1833 * set of XDR encode/decode routines which are intended to be shared by
1834 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1835 *
1836 * If the pain of reading these is too great, it should be a straightforward
1837 * task to translate them into Linux-specific versions which are more
1838 * consistent with the style used in NFSv2/v3...
1839 */
1840 #define READ32(x) (x) = ntohl(*p++)
1841 #define READ64(x) do { \
1842 (x) = (u64)ntohl(*p++) << 32; \
1843 (x) |= ntohl(*p++); \
1844 } while (0)
1845 #define READTIME(x) do { \
1846 p++; \
1847 (x.tv_sec) = ntohl(*p++); \
1848 (x.tv_nsec) = ntohl(*p++); \
1849 } while (0)
1850 #define COPYMEM(x,nbytes) do { \
1851 memcpy((x), p, nbytes); \
1852 p += XDR_QUADLEN(nbytes); \
1853 } while (0)
1854
1855 #define READ_BUF(nbytes) do { \
1856 p = xdr_inline_decode(xdr, nbytes); \
1857 if (!p) { \
1858 printk(KERN_WARNING "%s: reply buffer overflowed in line %d.", \
1859 __FUNCTION__, __LINE__); \
1860 return -EIO; \
1861 } \
1862 } while (0)
1863
1864 static int decode_opaque_inline(struct xdr_stream *xdr, uint32_t *len, char **string)
1865 {
1866 uint32_t *p;
1867
1868 READ_BUF(4);
1869 READ32(*len);
1870 READ_BUF(*len);
1871 *string = (char *)p;
1872 return 0;
1873 }
1874
1875 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
1876 {
1877 uint32_t *p;
1878
1879 READ_BUF(8);
1880 READ32(hdr->status);
1881 READ32(hdr->taglen);
1882
1883 READ_BUF(hdr->taglen + 4);
1884 hdr->tag = (char *)p;
1885 p += XDR_QUADLEN(hdr->taglen);
1886 READ32(hdr->nops);
1887 return 0;
1888 }
1889
1890 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
1891 {
1892 uint32_t *p;
1893 uint32_t opnum;
1894 int32_t nfserr;
1895
1896 READ_BUF(8);
1897 READ32(opnum);
1898 if (opnum != expected) {
1899 printk(KERN_NOTICE
1900 "nfs4_decode_op_hdr: Server returned operation"
1901 " %d but we issued a request for %d\n",
1902 opnum, expected);
1903 return -EIO;
1904 }
1905 READ32(nfserr);
1906 if (nfserr != NFS_OK)
1907 return -nfs_stat_to_errno(nfserr);
1908 return 0;
1909 }
1910
1911 /* Dummy routine */
1912 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs4_client *clp)
1913 {
1914 uint32_t *p;
1915 uint32_t strlen;
1916 char *str;
1917
1918 READ_BUF(12);
1919 return decode_opaque_inline(xdr, &strlen, &str);
1920 }
1921
1922 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
1923 {
1924 uint32_t bmlen, *p;
1925
1926 READ_BUF(4);
1927 READ32(bmlen);
1928
1929 bitmap[0] = bitmap[1] = 0;
1930 READ_BUF((bmlen << 2));
1931 if (bmlen > 0) {
1932 READ32(bitmap[0]);
1933 if (bmlen > 1)
1934 READ32(bitmap[1]);
1935 }
1936 return 0;
1937 }
1938
1939 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, uint32_t **savep)
1940 {
1941 uint32_t *p;
1942
1943 READ_BUF(4);
1944 READ32(*attrlen);
1945 *savep = xdr->p;
1946 return 0;
1947 }
1948
1949 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
1950 {
1951 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
1952 decode_attr_bitmap(xdr, bitmask);
1953 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
1954 } else
1955 bitmask[0] = bitmask[1] = 0;
1956 dprintk("%s: bitmask=0x%x%x\n", __FUNCTION__, bitmask[0], bitmask[1]);
1957 return 0;
1958 }
1959
1960 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
1961 {
1962 uint32_t *p;
1963
1964 *type = 0;
1965 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
1966 return -EIO;
1967 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
1968 READ_BUF(4);
1969 READ32(*type);
1970 if (*type < NF4REG || *type > NF4NAMEDATTR) {
1971 dprintk("%s: bad type %d\n", __FUNCTION__, *type);
1972 return -EIO;
1973 }
1974 bitmap[0] &= ~FATTR4_WORD0_TYPE;
1975 }
1976 dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
1977 return 0;
1978 }
1979
1980 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
1981 {
1982 uint32_t *p;
1983
1984 *change = 0;
1985 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
1986 return -EIO;
1987 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
1988 READ_BUF(8);
1989 READ64(*change);
1990 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
1991 }
1992 dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
1993 (unsigned long long)*change);
1994 return 0;
1995 }
1996
1997 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
1998 {
1999 uint32_t *p;
2000
2001 *size = 0;
2002 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2003 return -EIO;
2004 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2005 READ_BUF(8);
2006 READ64(*size);
2007 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2008 }
2009 dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
2010 return 0;
2011 }
2012
2013 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2014 {
2015 uint32_t *p;
2016
2017 *res = 0;
2018 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2019 return -EIO;
2020 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2021 READ_BUF(4);
2022 READ32(*res);
2023 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2024 }
2025 dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2026 return 0;
2027 }
2028
2029 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2030 {
2031 uint32_t *p;
2032
2033 *res = 0;
2034 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2035 return -EIO;
2036 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2037 READ_BUF(4);
2038 READ32(*res);
2039 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2040 }
2041 dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2042 return 0;
2043 }
2044
2045 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fsid *fsid)
2046 {
2047 uint32_t *p;
2048
2049 fsid->major = 0;
2050 fsid->minor = 0;
2051 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2052 return -EIO;
2053 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2054 READ_BUF(16);
2055 READ64(fsid->major);
2056 READ64(fsid->minor);
2057 bitmap[0] &= ~FATTR4_WORD0_FSID;
2058 }
2059 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
2060 (unsigned long long)fsid->major,
2061 (unsigned long long)fsid->minor);
2062 return 0;
2063 }
2064
2065 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2066 {
2067 uint32_t *p;
2068
2069 *res = 60;
2070 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2071 return -EIO;
2072 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2073 READ_BUF(4);
2074 READ32(*res);
2075 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2076 }
2077 dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
2078 return 0;
2079 }
2080
2081 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2082 {
2083 uint32_t *p;
2084
2085 *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2086 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2087 return -EIO;
2088 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2089 READ_BUF(4);
2090 READ32(*res);
2091 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2092 }
2093 dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
2094 return 0;
2095 }
2096
2097 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2098 {
2099 uint32_t *p;
2100
2101 *fileid = 0;
2102 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2103 return -EIO;
2104 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2105 READ_BUF(8);
2106 READ64(*fileid);
2107 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2108 }
2109 dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2110 return 0;
2111 }
2112
2113 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2114 {
2115 uint32_t *p;
2116 int status = 0;
2117
2118 *res = 0;
2119 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2120 return -EIO;
2121 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2122 READ_BUF(8);
2123 READ64(*res);
2124 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2125 }
2126 dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2127 return status;
2128 }
2129
2130 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2131 {
2132 uint32_t *p;
2133 int status = 0;
2134
2135 *res = 0;
2136 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2137 return -EIO;
2138 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2139 READ_BUF(8);
2140 READ64(*res);
2141 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2142 }
2143 dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2144 return status;
2145 }
2146
2147 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2148 {
2149 uint32_t *p;
2150 int status = 0;
2151
2152 *res = 0;
2153 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2154 return -EIO;
2155 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2156 READ_BUF(8);
2157 READ64(*res);
2158 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2159 }
2160 dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2161 return status;
2162 }
2163
2164 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2165 {
2166 uint32_t *p;
2167 int status = 0;
2168
2169 *res = 0;
2170 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2171 return -EIO;
2172 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2173 READ_BUF(8);
2174 READ64(*res);
2175 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2176 }
2177 dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2178 return status;
2179 }
2180
2181 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2182 {
2183 uint32_t *p;
2184 int status = 0;
2185
2186 *maxlink = 1;
2187 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2188 return -EIO;
2189 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2190 READ_BUF(4);
2191 READ32(*maxlink);
2192 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2193 }
2194 dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
2195 return status;
2196 }
2197
2198 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2199 {
2200 uint32_t *p;
2201 int status = 0;
2202
2203 *maxname = 1024;
2204 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2205 return -EIO;
2206 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2207 READ_BUF(4);
2208 READ32(*maxname);
2209 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2210 }
2211 dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
2212 return status;
2213 }
2214
2215 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2216 {
2217 uint32_t *p;
2218 int status = 0;
2219
2220 *res = 1024;
2221 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2222 return -EIO;
2223 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2224 uint64_t maxread;
2225 READ_BUF(8);
2226 READ64(maxread);
2227 if (maxread > 0x7FFFFFFF)
2228 maxread = 0x7FFFFFFF;
2229 *res = (uint32_t)maxread;
2230 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2231 }
2232 dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
2233 return status;
2234 }
2235
2236 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2237 {
2238 uint32_t *p;
2239 int status = 0;
2240
2241 *res = 1024;
2242 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2243 return -EIO;
2244 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2245 uint64_t maxwrite;
2246 READ_BUF(8);
2247 READ64(maxwrite);
2248 if (maxwrite > 0x7FFFFFFF)
2249 maxwrite = 0x7FFFFFFF;
2250 *res = (uint32_t)maxwrite;
2251 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2252 }
2253 dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
2254 return status;
2255 }
2256
2257 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2258 {
2259 uint32_t *p;
2260
2261 *mode = 0;
2262 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2263 return -EIO;
2264 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2265 READ_BUF(4);
2266 READ32(*mode);
2267 *mode &= ~S_IFMT;
2268 bitmap[1] &= ~FATTR4_WORD1_MODE;
2269 }
2270 dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
2271 return 0;
2272 }
2273
2274 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2275 {
2276 uint32_t *p;
2277
2278 *nlink = 1;
2279 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2280 return -EIO;
2281 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2282 READ_BUF(4);
2283 READ32(*nlink);
2284 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2285 }
2286 dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
2287 return 0;
2288 }
2289
2290 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *uid)
2291 {
2292 uint32_t len, *p;
2293
2294 *uid = -2;
2295 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2296 return -EIO;
2297 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2298 READ_BUF(4);
2299 READ32(len);
2300 READ_BUF(len);
2301 if (len < XDR_MAX_NETOBJ) {
2302 if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2303 dprintk("%s: nfs_map_name_to_uid failed!\n",
2304 __FUNCTION__);
2305 } else
2306 printk(KERN_WARNING "%s: name too long (%u)!\n",
2307 __FUNCTION__, len);
2308 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2309 }
2310 dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
2311 return 0;
2312 }
2313
2314 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *gid)
2315 {
2316 uint32_t len, *p;
2317
2318 *gid = -2;
2319 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2320 return -EIO;
2321 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2322 READ_BUF(4);
2323 READ32(len);
2324 READ_BUF(len);
2325 if (len < XDR_MAX_NETOBJ) {
2326 if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2327 dprintk("%s: nfs_map_group_to_gid failed!\n",
2328 __FUNCTION__);
2329 } else
2330 printk(KERN_WARNING "%s: name too long (%u)!\n",
2331 __FUNCTION__, len);
2332 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2333 }
2334 dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
2335 return 0;
2336 }
2337
2338 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2339 {
2340 uint32_t major = 0, minor = 0, *p;
2341
2342 *rdev = MKDEV(0,0);
2343 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2344 return -EIO;
2345 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2346 dev_t tmp;
2347
2348 READ_BUF(8);
2349 READ32(major);
2350 READ32(minor);
2351 tmp = MKDEV(major, minor);
2352 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2353 *rdev = tmp;
2354 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2355 }
2356 dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
2357 return 0;
2358 }
2359
2360 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2361 {
2362 uint32_t *p;
2363 int status = 0;
2364
2365 *res = 0;
2366 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2367 return -EIO;
2368 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2369 READ_BUF(8);
2370 READ64(*res);
2371 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2372 }
2373 dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2374 return status;
2375 }
2376
2377 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2378 {
2379 uint32_t *p;
2380 int status = 0;
2381
2382 *res = 0;
2383 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2384 return -EIO;
2385 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2386 READ_BUF(8);
2387 READ64(*res);
2388 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2389 }
2390 dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2391 return status;
2392 }
2393
2394 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2395 {
2396 uint32_t *p;
2397 int status = 0;
2398
2399 *res = 0;
2400 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2401 return -EIO;
2402 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2403 READ_BUF(8);
2404 READ64(*res);
2405 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2406 }
2407 dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2408 return status;
2409 }
2410
2411 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2412 {
2413 uint32_t *p;
2414
2415 *used = 0;
2416 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2417 return -EIO;
2418 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2419 READ_BUF(8);
2420 READ64(*used);
2421 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2422 }
2423 dprintk("%s: space used=%Lu\n", __FUNCTION__,
2424 (unsigned long long)*used);
2425 return 0;
2426 }
2427
2428 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2429 {
2430 uint32_t *p;
2431 uint64_t sec;
2432 uint32_t nsec;
2433
2434 READ_BUF(12);
2435 READ64(sec);
2436 READ32(nsec);
2437 time->tv_sec = (time_t)sec;
2438 time->tv_nsec = (long)nsec;
2439 return 0;
2440 }
2441
2442 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2443 {
2444 int status = 0;
2445
2446 time->tv_sec = 0;
2447 time->tv_nsec = 0;
2448 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2449 return -EIO;
2450 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2451 status = decode_attr_time(xdr, time);
2452 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2453 }
2454 dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2455 return status;
2456 }
2457
2458 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2459 {
2460 int status = 0;
2461
2462 time->tv_sec = 0;
2463 time->tv_nsec = 0;
2464 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2465 return -EIO;
2466 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2467 status = decode_attr_time(xdr, time);
2468 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2469 }
2470 dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2471 return status;
2472 }
2473
2474 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2475 {
2476 int status = 0;
2477
2478 time->tv_sec = 0;
2479 time->tv_nsec = 0;
2480 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2481 return -EIO;
2482 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2483 status = decode_attr_time(xdr, time);
2484 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2485 }
2486 dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2487 return status;
2488 }
2489
2490 static int verify_attr_len(struct xdr_stream *xdr, uint32_t *savep, uint32_t attrlen)
2491 {
2492 unsigned int attrwords = XDR_QUADLEN(attrlen);
2493 unsigned int nwords = xdr->p - savep;
2494
2495 if (unlikely(attrwords != nwords)) {
2496 printk(KERN_WARNING "%s: server returned incorrect attribute length: %u %c %u\n",
2497 __FUNCTION__,
2498 attrwords << 2,
2499 (attrwords < nwords) ? '<' : '>',
2500 nwords << 2);
2501 return -EIO;
2502 }
2503 return 0;
2504 }
2505
2506 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2507 {
2508 uint32_t *p;
2509
2510 READ_BUF(20);
2511 READ32(cinfo->atomic);
2512 READ64(cinfo->before);
2513 READ64(cinfo->after);
2514 return 0;
2515 }
2516
2517 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2518 {
2519 uint32_t *p;
2520 uint32_t supp, acc;
2521 int status;
2522
2523 status = decode_op_hdr(xdr, OP_ACCESS);
2524 if (status)
2525 return status;
2526 READ_BUF(8);
2527 READ32(supp);
2528 READ32(acc);
2529 access->supported = supp;
2530 access->access = acc;
2531 return 0;
2532 }
2533
2534 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2535 {
2536 uint32_t *p;
2537 int status;
2538
2539 status = decode_op_hdr(xdr, OP_CLOSE);
2540 if (status)
2541 return status;
2542 READ_BUF(sizeof(res->stateid.data));
2543 COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2544 return 0;
2545 }
2546
2547 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
2548 {
2549 uint32_t *p;
2550 int status;
2551
2552 status = decode_op_hdr(xdr, OP_COMMIT);
2553 if (status)
2554 return status;
2555 READ_BUF(8);
2556 COPYMEM(res->verf->verifier, 8);
2557 return 0;
2558 }
2559
2560 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2561 {
2562 uint32_t *p;
2563 uint32_t bmlen;
2564 int status;
2565
2566 status = decode_op_hdr(xdr, OP_CREATE);
2567 if (status)
2568 return status;
2569 if ((status = decode_change_info(xdr, cinfo)))
2570 return status;
2571 READ_BUF(4);
2572 READ32(bmlen);
2573 READ_BUF(bmlen << 2);
2574 return 0;
2575 }
2576
2577 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
2578 {
2579 uint32_t *savep;
2580 uint32_t attrlen,
2581 bitmap[2] = {0};
2582 int status;
2583
2584 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2585 goto xdr_error;
2586 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2587 goto xdr_error;
2588 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2589 goto xdr_error;
2590 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
2591 goto xdr_error;
2592 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
2593 goto xdr_error;
2594 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
2595 goto xdr_error;
2596 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
2597 goto xdr_error;
2598 status = verify_attr_len(xdr, savep, attrlen);
2599 xdr_error:
2600 if (status != 0)
2601 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2602 return status;
2603 }
2604
2605 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
2606 {
2607 uint32_t *savep;
2608 uint32_t attrlen,
2609 bitmap[2] = {0};
2610 int status;
2611
2612 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2613 goto xdr_error;
2614 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2615 goto xdr_error;
2616 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2617 goto xdr_error;
2618
2619 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
2620 goto xdr_error;
2621 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
2622 goto xdr_error;
2623 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
2624 goto xdr_error;
2625 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
2626 goto xdr_error;
2627 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
2628 goto xdr_error;
2629 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
2630 goto xdr_error;
2631
2632 status = verify_attr_len(xdr, savep, attrlen);
2633 xdr_error:
2634 if (status != 0)
2635 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2636 return status;
2637 }
2638
2639 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
2640 {
2641 uint32_t *savep;
2642 uint32_t attrlen,
2643 bitmap[2] = {0};
2644 int status;
2645
2646 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2647 goto xdr_error;
2648 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2649 goto xdr_error;
2650 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2651 goto xdr_error;
2652
2653 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
2654 goto xdr_error;
2655 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
2656 goto xdr_error;
2657
2658 status = verify_attr_len(xdr, savep, attrlen);
2659 xdr_error:
2660 if (status != 0)
2661 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2662 return status;
2663 }
2664
2665 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
2666 {
2667 uint32_t *savep;
2668 uint32_t attrlen,
2669 bitmap[2] = {0},
2670 type;
2671 int status, fmode = 0;
2672
2673 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2674 goto xdr_error;
2675 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2676 goto xdr_error;
2677
2678 fattr->bitmap[0] = bitmap[0];
2679 fattr->bitmap[1] = bitmap[1];
2680
2681 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2682 goto xdr_error;
2683
2684
2685 if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
2686 goto xdr_error;
2687 fattr->type = nfs_type2fmt[type].nfs2type;
2688 fmode = nfs_type2fmt[type].mode;
2689
2690 if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
2691 goto xdr_error;
2692 if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
2693 goto xdr_error;
2694 if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid_u.nfs4)) != 0)
2695 goto xdr_error;
2696 if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
2697 goto xdr_error;
2698 if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
2699 goto xdr_error;
2700 fattr->mode |= fmode;
2701 if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
2702 goto xdr_error;
2703 if ((status = decode_attr_owner(xdr, bitmap, server->nfs4_state, &fattr->uid)) != 0)
2704 goto xdr_error;
2705 if ((status = decode_attr_group(xdr, bitmap, server->nfs4_state, &fattr->gid)) != 0)
2706 goto xdr_error;
2707 if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
2708 goto xdr_error;
2709 if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
2710 goto xdr_error;
2711 if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
2712 goto xdr_error;
2713 if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
2714 goto xdr_error;
2715 if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
2716 goto xdr_error;
2717 if ((status = verify_attr_len(xdr, savep, attrlen)) == 0) {
2718 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
2719 fattr->timestamp = jiffies;
2720 }
2721 xdr_error:
2722 if (status != 0)
2723 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2724 return status;
2725 }
2726
2727
2728 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
2729 {
2730 uint32_t *savep;
2731 uint32_t attrlen, bitmap[2];
2732 int status;
2733
2734 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2735 goto xdr_error;
2736 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2737 goto xdr_error;
2738 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2739 goto xdr_error;
2740
2741 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
2742
2743 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
2744 goto xdr_error;
2745 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
2746 goto xdr_error;
2747 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
2748 goto xdr_error;
2749 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
2750 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
2751 goto xdr_error;
2752 fsinfo->wtpref = fsinfo->wtmax;
2753
2754 status = verify_attr_len(xdr, savep, attrlen);
2755 xdr_error:
2756 if (status != 0)
2757 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2758 return status;
2759 }
2760
2761 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
2762 {
2763 uint32_t *p;
2764 uint32_t len;
2765 int status;
2766
2767 status = decode_op_hdr(xdr, OP_GETFH);
2768 if (status)
2769 return status;
2770 /* Zero handle first to allow comparisons */
2771 memset(fh, 0, sizeof(*fh));
2772
2773 READ_BUF(4);
2774 READ32(len);
2775 if (len > NFS4_FHSIZE)
2776 return -EIO;
2777 fh->size = len;
2778 READ_BUF(len);
2779 COPYMEM(fh->data, len);
2780 return 0;
2781 }
2782
2783 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2784 {
2785 int status;
2786
2787 status = decode_op_hdr(xdr, OP_LINK);
2788 if (status)
2789 return status;
2790 return decode_change_info(xdr, cinfo);
2791 }
2792
2793 /*
2794 * We create the owner, so we know a proper owner.id length is 4.
2795 */
2796 static int decode_lock_denied (struct xdr_stream *xdr, struct nfs_lock_denied *denied)
2797 {
2798 uint32_t *p;
2799 uint32_t namelen;
2800
2801 READ_BUF(32);
2802 READ64(denied->offset);
2803 READ64(denied->length);
2804 READ32(denied->type);
2805 READ64(denied->owner.clientid);
2806 READ32(namelen);
2807 READ_BUF(namelen);
2808 if (namelen == 4)
2809 READ32(denied->owner.id);
2810 return -NFS4ERR_DENIED;
2811 }
2812
2813 static int decode_lock(struct xdr_stream *xdr, struct nfs_lockres *res)
2814 {
2815 uint32_t *p;
2816 int status;
2817
2818 status = decode_op_hdr(xdr, OP_LOCK);
2819 if (status == 0) {
2820 READ_BUF(sizeof(nfs4_stateid));
2821 COPYMEM(&res->u.stateid, sizeof(res->u.stateid));
2822 } else if (status == -NFS4ERR_DENIED)
2823 return decode_lock_denied(xdr, &res->u.denied);
2824 return status;
2825 }
2826
2827 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockres *res)
2828 {
2829 int status;
2830 status = decode_op_hdr(xdr, OP_LOCKT);
2831 if (status == -NFS4ERR_DENIED)
2832 return decode_lock_denied(xdr, &res->u.denied);
2833 return status;
2834 }
2835
2836 static int decode_locku(struct xdr_stream *xdr, struct nfs_lockres *res)
2837 {
2838 uint32_t *p;
2839 int status;
2840
2841 status = decode_op_hdr(xdr, OP_LOCKU);
2842 if (status == 0) {
2843 READ_BUF(sizeof(nfs4_stateid));
2844 COPYMEM(&res->u.stateid, sizeof(res->u.stateid));
2845 }
2846 return status;
2847 }
2848
2849 static int decode_lookup(struct xdr_stream *xdr)
2850 {
2851 return decode_op_hdr(xdr, OP_LOOKUP);
2852 }
2853
2854 /* This is too sick! */
2855 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
2856 {
2857 uint32_t *p;
2858 uint32_t limit_type, nblocks, blocksize;
2859
2860 READ_BUF(12);
2861 READ32(limit_type);
2862 switch (limit_type) {
2863 case 1:
2864 READ64(*maxsize);
2865 break;
2866 case 2:
2867 READ32(nblocks);
2868 READ32(blocksize);
2869 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
2870 }
2871 return 0;
2872 }
2873
2874 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
2875 {
2876 uint32_t *p;
2877 uint32_t delegation_type;
2878
2879 READ_BUF(4);
2880 READ32(delegation_type);
2881 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
2882 res->delegation_type = 0;
2883 return 0;
2884 }
2885 READ_BUF(20);
2886 COPYMEM(res->delegation.data, sizeof(res->delegation.data));
2887 READ32(res->do_recall);
2888 switch (delegation_type) {
2889 case NFS4_OPEN_DELEGATE_READ:
2890 res->delegation_type = FMODE_READ;
2891 break;
2892 case NFS4_OPEN_DELEGATE_WRITE:
2893 res->delegation_type = FMODE_WRITE|FMODE_READ;
2894 if (decode_space_limit(xdr, &res->maxsize) < 0)
2895 return -EIO;
2896 }
2897 return decode_ace(xdr, NULL, res->server->nfs4_state);
2898 }
2899
2900 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
2901 {
2902 uint32_t *p;
2903 uint32_t bmlen;
2904 int status;
2905
2906 status = decode_op_hdr(xdr, OP_OPEN);
2907 if (status)
2908 return status;
2909 READ_BUF(sizeof(res->stateid.data));
2910 COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2911
2912 decode_change_info(xdr, &res->cinfo);
2913
2914 READ_BUF(8);
2915 READ32(res->rflags);
2916 READ32(bmlen);
2917 if (bmlen > 10)
2918 goto xdr_error;
2919
2920 READ_BUF(bmlen << 2);
2921 p += bmlen;
2922 return decode_delegation(xdr, res);
2923 xdr_error:
2924 printk(KERN_NOTICE "%s: xdr error!\n", __FUNCTION__);
2925 return -EIO;
2926 }
2927
2928 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
2929 {
2930 uint32_t *p;
2931 int status;
2932
2933 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
2934 if (status)
2935 return status;
2936 READ_BUF(sizeof(res->stateid.data));
2937 COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2938 return 0;
2939 }
2940
2941 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
2942 {
2943 uint32_t *p;
2944 int status;
2945
2946 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
2947 if (status)
2948 return status;
2949 READ_BUF(sizeof(res->stateid.data));
2950 COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2951 return 0;
2952 }
2953
2954 static int decode_putfh(struct xdr_stream *xdr)
2955 {
2956 return decode_op_hdr(xdr, OP_PUTFH);
2957 }
2958
2959 static int decode_putrootfh(struct xdr_stream *xdr)
2960 {
2961 return decode_op_hdr(xdr, OP_PUTROOTFH);
2962 }
2963
2964 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
2965 {
2966 struct kvec *iov = req->rq_rcv_buf.head;
2967 uint32_t *p;
2968 uint32_t count, eof, recvd, hdrlen;
2969 int status;
2970
2971 status = decode_op_hdr(xdr, OP_READ);
2972 if (status)
2973 return status;
2974 READ_BUF(8);
2975 READ32(eof);
2976 READ32(count);
2977 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
2978 recvd = req->rq_rcv_buf.len - hdrlen;
2979 if (count > recvd) {
2980 printk(KERN_WARNING "NFS: server cheating in read reply: "
2981 "count %u > recvd %u\n", count, recvd);
2982 count = recvd;
2983 eof = 0;
2984 }
2985 xdr_read_pages(xdr, count);
2986 res->eof = eof;
2987 res->count = count;
2988 return 0;
2989 }
2990
2991 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
2992 {
2993 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
2994 struct page *page = *rcvbuf->pages;
2995 struct kvec *iov = rcvbuf->head;
2996 unsigned int nr, pglen = rcvbuf->page_len;
2997 uint32_t *end, *entry, *p, *kaddr;
2998 uint32_t len, attrlen;
2999 int hdrlen, recvd, status;
3000
3001 status = decode_op_hdr(xdr, OP_READDIR);
3002 if (status)
3003 return status;
3004 READ_BUF(8);
3005 COPYMEM(readdir->verifier.data, 8);
3006
3007 hdrlen = (char *) p - (char *) iov->iov_base;
3008 recvd = rcvbuf->len - hdrlen;
3009 if (pglen > recvd)
3010 pglen = recvd;
3011 xdr_read_pages(xdr, pglen);
3012
3013 BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3014 kaddr = p = (uint32_t *) kmap_atomic(page, KM_USER0);
3015 end = (uint32_t *) ((char *)p + pglen + readdir->pgbase);
3016 entry = p;
3017 for (nr = 0; *p++; nr++) {
3018 if (p + 3 > end)
3019 goto short_pkt;
3020 p += 2; /* cookie */
3021 len = ntohl(*p++); /* filename length */
3022 if (len > NFS4_MAXNAMLEN) {
3023 printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)\n", len);
3024 goto err_unmap;
3025 }
3026 p += XDR_QUADLEN(len);
3027 if (p + 1 > end)
3028 goto short_pkt;
3029 len = ntohl(*p++); /* bitmap length */
3030 p += len;
3031 if (p + 1 > end)
3032 goto short_pkt;
3033 attrlen = XDR_QUADLEN(ntohl(*p++));
3034 p += attrlen; /* attributes */
3035 if (p + 2 > end)
3036 goto short_pkt;
3037 entry = p;
3038 }
3039 if (!nr && (entry[0] != 0 || entry[1] == 0))
3040 goto short_pkt;
3041 out:
3042 kunmap_atomic(kaddr, KM_USER0);
3043 return 0;
3044 short_pkt:
3045 entry[0] = entry[1] = 0;
3046 /* truncate listing ? */
3047 if (!nr) {
3048 printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
3049 entry[1] = 1;
3050 }
3051 goto out;
3052 err_unmap:
3053 kunmap_atomic(kaddr, KM_USER0);
3054 return -errno_NFSERR_IO;
3055 }
3056
3057 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3058 {
3059 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3060 struct kvec *iov = rcvbuf->head;
3061 int hdrlen, len, recvd;
3062 uint32_t *p;
3063 char *kaddr;
3064 int status;
3065
3066 status = decode_op_hdr(xdr, OP_READLINK);
3067 if (status)
3068 return status;
3069
3070 /* Convert length of symlink */
3071 READ_BUF(4);
3072 READ32(len);
3073 if (len >= rcvbuf->page_len || len <= 0) {
3074 dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
3075 return -ENAMETOOLONG;
3076 }
3077 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3078 recvd = req->rq_rcv_buf.len - hdrlen;
3079 if (recvd < len) {
3080 printk(KERN_WARNING "NFS: server cheating in readlink reply: "
3081 "count %u > recvd %u\n", len, recvd);
3082 return -EIO;
3083 }
3084 xdr_read_pages(xdr, len);
3085 /*
3086 * The XDR encode routine has set things up so that
3087 * the link text will be copied directly into the
3088 * buffer. We just have to do overflow-checking,
3089 * and and null-terminate the text (the VFS expects
3090 * null-termination).
3091 */
3092 kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3093 kaddr[len+rcvbuf->page_base] = '\0';
3094 kunmap_atomic(kaddr, KM_USER0);
3095 return 0;
3096 }
3097
3098 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3099 {
3100 int status;
3101
3102 status = decode_op_hdr(xdr, OP_REMOVE);
3103 if (status)
3104 goto out;
3105 status = decode_change_info(xdr, cinfo);
3106 out:
3107 return status;
3108 }
3109
3110 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3111 struct nfs4_change_info *new_cinfo)
3112 {
3113 int status;
3114
3115 status = decode_op_hdr(xdr, OP_RENAME);
3116 if (status)
3117 goto out;
3118 if ((status = decode_change_info(xdr, old_cinfo)))
3119 goto out;
3120 status = decode_change_info(xdr, new_cinfo);
3121 out:
3122 return status;
3123 }
3124
3125 static int decode_renew(struct xdr_stream *xdr)
3126 {
3127 return decode_op_hdr(xdr, OP_RENEW);
3128 }
3129
3130 static int
3131 decode_savefh(struct xdr_stream *xdr)
3132 {
3133 return decode_op_hdr(xdr, OP_SAVEFH);
3134 }
3135
3136 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3137 {
3138 uint32_t *p;
3139 uint32_t bmlen;
3140 int status;
3141
3142
3143 status = decode_op_hdr(xdr, OP_SETATTR);
3144 if (status)
3145 return status;
3146 READ_BUF(4);
3147 READ32(bmlen);
3148 READ_BUF(bmlen << 2);
3149 return 0;
3150 }
3151
3152 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_client *clp)
3153 {
3154 uint32_t *p;
3155 uint32_t opnum;
3156 int32_t nfserr;
3157
3158 READ_BUF(8);
3159 READ32(opnum);
3160 if (opnum != OP_SETCLIENTID) {
3161 printk(KERN_NOTICE
3162 "nfs4_decode_setclientid: Server returned operation"
3163 " %d\n", opnum);
3164 return -EIO;
3165 }
3166 READ32(nfserr);
3167 if (nfserr == NFS_OK) {
3168 READ_BUF(8 + sizeof(clp->cl_confirm.data));
3169 READ64(clp->cl_clientid);
3170 COPYMEM(clp->cl_confirm.data, sizeof(clp->cl_confirm.data));
3171 } else if (nfserr == NFSERR_CLID_INUSE) {
3172 uint32_t len;
3173
3174 /* skip netid string */
3175 READ_BUF(4);
3176 READ32(len);
3177 READ_BUF(len);
3178
3179 /* skip uaddr string */
3180 READ_BUF(4);
3181 READ32(len);
3182 READ_BUF(len);
3183 return -NFSERR_CLID_INUSE;
3184 } else
3185 return -nfs_stat_to_errno(nfserr);
3186
3187 return 0;
3188 }
3189
3190 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3191 {
3192 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3193 }
3194
3195 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3196 {
3197 uint32_t *p;
3198 int status;
3199
3200 status = decode_op_hdr(xdr, OP_WRITE);
3201 if (status)
3202 return status;
3203
3204 READ_BUF(16);
3205 READ32(res->count);
3206 READ32(res->verf->committed);
3207 COPYMEM(res->verf->verifier, 8);
3208 return 0;
3209 }
3210
3211 static int decode_delegreturn(struct xdr_stream *xdr)
3212 {
3213 return decode_op_hdr(xdr, OP_DELEGRETURN);
3214 }
3215
3216 /*
3217 * Decode OPEN_DOWNGRADE response
3218 */
3219 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3220 {
3221 struct xdr_stream xdr;
3222 struct compound_hdr hdr;
3223 int status;
3224
3225 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3226 status = decode_compound_hdr(&xdr, &hdr);
3227 if (status)
3228 goto out;
3229 status = decode_putfh(&xdr);
3230 if (status)
3231 goto out;
3232 status = decode_open_downgrade(&xdr, res);
3233 out:
3234 return status;
3235 }
3236
3237 /*
3238 * END OF "GENERIC" DECODE ROUTINES.
3239 */
3240
3241 /*
3242 * Decode ACCESS response
3243 */
3244 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_accessres *res)
3245 {
3246 struct xdr_stream xdr;
3247 struct compound_hdr hdr;
3248 int status;
3249
3250 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3251 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3252 goto out;
3253 if ((status = decode_putfh(&xdr)) == 0)
3254 status = decode_access(&xdr, res);
3255 out:
3256 return status;
3257 }
3258
3259 /*
3260 * Decode LOOKUP response
3261 */
3262 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
3263 {
3264 struct xdr_stream xdr;
3265 struct compound_hdr hdr;
3266 int status;
3267
3268 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3269 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3270 goto out;
3271 if ((status = decode_putfh(&xdr)) != 0)
3272 goto out;
3273 if ((status = decode_lookup(&xdr)) != 0)
3274 goto out;
3275 if ((status = decode_getfh(&xdr, res->fh)) != 0)
3276 goto out;
3277 status = decode_getfattr(&xdr, res->fattr, res->server);
3278 out:
3279 return status;
3280 }
3281
3282 /*
3283 * Decode LOOKUP_ROOT response
3284 */
3285 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
3286 {
3287 struct xdr_stream xdr;
3288 struct compound_hdr hdr;
3289 int status;
3290
3291 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3292 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3293 goto out;
3294 if ((status = decode_putrootfh(&xdr)) != 0)
3295 goto out;
3296 if ((status = decode_getfh(&xdr, res->fh)) == 0)
3297 status = decode_getfattr(&xdr, res->fattr, res->server);
3298 out:
3299 return status;
3300 }
3301
3302 /*
3303 * Decode REMOVE response
3304 */
3305 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_change_info *cinfo)
3306 {
3307 struct xdr_stream xdr;
3308 struct compound_hdr hdr;
3309 int status;
3310
3311 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3312 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3313 goto out;
3314 if ((status = decode_putfh(&xdr)) == 0)
3315 status = decode_remove(&xdr, cinfo);
3316 out:
3317 return status;
3318 }
3319
3320 /*
3321 * Decode RENAME response
3322 */
3323 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_rename_res *res)
3324 {
3325 struct xdr_stream xdr;
3326 struct compound_hdr hdr;
3327 int status;
3328
3329 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3330 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3331 goto out;
3332 if ((status = decode_putfh(&xdr)) != 0)
3333 goto out;
3334 if ((status = decode_savefh(&xdr)) != 0)
3335 goto out;
3336 if ((status = decode_putfh(&xdr)) != 0)
3337 goto out;
3338 status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo);
3339 out:
3340 return status;
3341 }
3342
3343 /*
3344 * Decode LINK response
3345 */
3346 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_change_info *cinfo)
3347 {
3348 struct xdr_stream xdr;
3349 struct compound_hdr hdr;
3350 int status;
3351
3352 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3353 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3354 goto out;
3355 if ((status = decode_putfh(&xdr)) != 0)
3356 goto out;
3357 if ((status = decode_savefh(&xdr)) != 0)
3358 goto out;
3359 if ((status = decode_putfh(&xdr)) != 0)
3360 goto out;
3361 status = decode_link(&xdr, cinfo);
3362 out:
3363 return status;
3364 }
3365
3366 /*
3367 * Decode CREATE response
3368 */
3369 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
3370 {
3371 struct xdr_stream xdr;
3372 struct compound_hdr hdr;
3373 int status;
3374
3375 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3376 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3377 goto out;
3378 if ((status = decode_putfh(&xdr)) != 0)
3379 goto out;
3380 if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3381 goto out;
3382 if ((status = decode_getfh(&xdr, res->fh)) != 0)
3383 goto out;
3384 status = decode_getfattr(&xdr, res->fattr, res->server);
3385 if (status == NFS4ERR_DELAY)
3386 status = 0;
3387 out:
3388 return status;
3389 }
3390
3391 /*
3392 * Decode SYMLINK response
3393 */
3394 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
3395 {
3396 return nfs4_xdr_dec_create(rqstp, p, res);
3397 }
3398
3399 /*
3400 * Decode GETATTR response
3401 */
3402 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_getattr_res *res)
3403 {
3404 struct xdr_stream xdr;
3405 struct compound_hdr hdr;
3406 int status;
3407
3408 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3409 status = decode_compound_hdr(&xdr, &hdr);
3410 if (status)
3411 goto out;
3412 status = decode_putfh(&xdr);
3413 if (status)
3414 goto out;
3415 status = decode_getfattr(&xdr, res->fattr, res->server);
3416 out:
3417 return status;
3418
3419 }
3420
3421
3422 /*
3423 * Decode CLOSE response
3424 */
3425 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3426 {
3427 struct xdr_stream xdr;
3428 struct compound_hdr hdr;
3429 int status;
3430
3431 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3432 status = decode_compound_hdr(&xdr, &hdr);
3433 if (status)
3434 goto out;
3435 status = decode_putfh(&xdr);
3436 if (status)
3437 goto out;
3438 status = decode_close(&xdr, res);
3439 out:
3440 return status;
3441 }
3442
3443 /*
3444 * Decode OPEN response
3445 */
3446 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
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 status = decode_compound_hdr(&xdr, &hdr);
3454 if (status)
3455 goto out;
3456 status = decode_putfh(&xdr);
3457 if (status)
3458 goto out;
3459 status = decode_open(&xdr, res);
3460 if (status)
3461 goto out;
3462 status = decode_getfh(&xdr, &res->fh);
3463 if (status)
3464 goto out;
3465 status = decode_getfattr(&xdr, res->f_attr, res->server);
3466 if (status == NFS4ERR_DELAY)
3467 status = 0;
3468 out:
3469 return status;
3470 }
3471
3472 /*
3473 * Decode OPEN_CONFIRM response
3474 */
3475 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_open_confirmres *res)
3476 {
3477 struct xdr_stream xdr;
3478 struct compound_hdr hdr;
3479 int status;
3480
3481 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3482 status = decode_compound_hdr(&xdr, &hdr);
3483 if (status)
3484 goto out;
3485 status = decode_putfh(&xdr);
3486 if (status)
3487 goto out;
3488 status = decode_open_confirm(&xdr, res);
3489 out:
3490 return status;
3491 }
3492
3493 /*
3494 * Decode OPEN response
3495 */
3496 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
3497 {
3498 struct xdr_stream xdr;
3499 struct compound_hdr hdr;
3500 int status;
3501
3502 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3503 status = decode_compound_hdr(&xdr, &hdr);
3504 if (status)
3505 goto out;
3506 status = decode_putfh(&xdr);
3507 if (status)
3508 goto out;
3509 status = decode_open(&xdr, res);
3510 out:
3511 return status;
3512 }
3513
3514 /*
3515 * Decode SETATTR response
3516 */
3517 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_setattrres *res)
3518 {
3519 struct xdr_stream xdr;
3520 struct compound_hdr hdr;
3521 int status;
3522
3523 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3524 status = decode_compound_hdr(&xdr, &hdr);
3525 if (status)
3526 goto out;
3527 status = decode_putfh(&xdr);
3528 if (status)
3529 goto out;
3530 status = decode_setattr(&xdr, res);
3531 if (status)
3532 goto out;
3533 status = decode_getfattr(&xdr, res->fattr, res->server);
3534 if (status == NFS4ERR_DELAY)
3535 status = 0;
3536 out:
3537 return status;
3538 }
3539
3540 /*
3541 * Decode LOCK response
3542 */
3543 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
3544 {
3545 struct xdr_stream xdr;
3546 struct compound_hdr hdr;
3547 int status;
3548
3549 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3550 status = decode_compound_hdr(&xdr, &hdr);
3551 if (status)
3552 goto out;
3553 status = decode_putfh(&xdr);
3554 if (status)
3555 goto out;
3556 status = decode_lock(&xdr, res);
3557 out:
3558 return status;
3559 }
3560
3561 /*
3562 * Decode LOCKT response
3563 */
3564 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
3565 {
3566 struct xdr_stream xdr;
3567 struct compound_hdr hdr;
3568 int status;
3569
3570 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3571 status = decode_compound_hdr(&xdr, &hdr);
3572 if (status)
3573 goto out;
3574 status = decode_putfh(&xdr);
3575 if (status)
3576 goto out;
3577 status = decode_lockt(&xdr, res);
3578 out:
3579 return status;
3580 }
3581
3582 /*
3583 * Decode LOCKU response
3584 */
3585 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
3586 {
3587 struct xdr_stream xdr;
3588 struct compound_hdr hdr;
3589 int status;
3590
3591 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3592 status = decode_compound_hdr(&xdr, &hdr);
3593 if (status)
3594 goto out;
3595 status = decode_putfh(&xdr);
3596 if (status)
3597 goto out;
3598 status = decode_locku(&xdr, res);
3599 out:
3600 return status;
3601 }
3602
3603 /*
3604 * Decode READLINK response
3605 */
3606 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, uint32_t *p, void *res)
3607 {
3608 struct xdr_stream xdr;
3609 struct compound_hdr hdr;
3610 int status;
3611
3612 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3613 status = decode_compound_hdr(&xdr, &hdr);
3614 if (status)
3615 goto out;
3616 status = decode_putfh(&xdr);
3617 if (status)
3618 goto out;
3619 status = decode_readlink(&xdr, rqstp);
3620 out:
3621 return status;
3622 }
3623
3624 /*
3625 * Decode READDIR response
3626 */
3627 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_readdir_res *res)
3628 {
3629 struct xdr_stream xdr;
3630 struct compound_hdr hdr;
3631 int status;
3632
3633 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3634 status = decode_compound_hdr(&xdr, &hdr);
3635 if (status)
3636 goto out;
3637 status = decode_putfh(&xdr);
3638 if (status)
3639 goto out;
3640 status = decode_readdir(&xdr, rqstp, res);
3641 out:
3642 return status;
3643 }
3644
3645 /*
3646 * Decode Read response
3647 */
3648 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_readres *res)
3649 {
3650 struct xdr_stream xdr;
3651 struct compound_hdr hdr;
3652 int status;
3653
3654 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3655 status = decode_compound_hdr(&xdr, &hdr);
3656 if (status)
3657 goto out;
3658 status = decode_putfh(&xdr);
3659 if (status)
3660 goto out;
3661 status = decode_read(&xdr, rqstp, res);
3662 if (!status)
3663 status = res->count;
3664 out:
3665 return status;
3666 }
3667
3668 /*
3669 * Decode WRITE response
3670 */
3671 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
3672 {
3673 struct xdr_stream xdr;
3674 struct compound_hdr hdr;
3675 int status;
3676
3677 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3678 status = decode_compound_hdr(&xdr, &hdr);
3679 if (status)
3680 goto out;
3681 status = decode_putfh(&xdr);
3682 if (status)
3683 goto out;
3684 status = decode_write(&xdr, res);
3685 if (!status)
3686 status = res->count;
3687 out:
3688 return status;
3689 }
3690
3691 /*
3692 * Decode COMMIT response
3693 */
3694 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
3695 {
3696 struct xdr_stream xdr;
3697 struct compound_hdr hdr;
3698 int status;
3699
3700 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3701 status = decode_compound_hdr(&xdr, &hdr);
3702 if (status)
3703 goto out;
3704 status = decode_putfh(&xdr);
3705 if (status)
3706 goto out;
3707 status = decode_commit(&xdr, res);
3708 out:
3709 return status;
3710 }
3711
3712 /*
3713 * FSINFO request
3714 */
3715 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
3716 {
3717 struct xdr_stream xdr;
3718 struct compound_hdr hdr;
3719 int status;
3720
3721 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3722 status = decode_compound_hdr(&xdr, &hdr);
3723 if (!status)
3724 status = decode_putfh(&xdr);
3725 if (!status)
3726 status = decode_fsinfo(&xdr, fsinfo);
3727 if (!status)
3728 status = -nfs_stat_to_errno(hdr.status);
3729 return status;
3730 }
3731
3732 /*
3733 * PATHCONF request
3734 */
3735 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, uint32_t *p, struct nfs_pathconf *pathconf)
3736 {
3737 struct xdr_stream xdr;
3738 struct compound_hdr hdr;
3739 int status;
3740
3741 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3742 status = decode_compound_hdr(&xdr, &hdr);
3743 if (!status)
3744 status = decode_putfh(&xdr);
3745 if (!status)
3746 status = decode_pathconf(&xdr, pathconf);
3747 return status;
3748 }
3749
3750 /*
3751 * STATFS request
3752 */
3753 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, uint32_t *p, struct nfs_fsstat *fsstat)
3754 {
3755 struct xdr_stream xdr;
3756 struct compound_hdr hdr;
3757 int status;
3758
3759 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3760 status = decode_compound_hdr(&xdr, &hdr);
3761 if (!status)
3762 status = decode_putfh(&xdr);
3763 if (!status)
3764 status = decode_statfs(&xdr, fsstat);
3765 return status;
3766 }
3767
3768 /*
3769 * GETATTR_BITMAP request
3770 */
3771 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, uint32_t *p, struct nfs4_server_caps_res *res)
3772 {
3773 struct xdr_stream xdr;
3774 struct compound_hdr hdr;
3775 int status;
3776
3777 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3778 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3779 goto out;
3780 if ((status = decode_putfh(&xdr)) != 0)
3781 goto out;
3782 status = decode_server_caps(&xdr, res);
3783 out:
3784 return status;
3785 }
3786
3787 /*
3788 * Decode RENEW response
3789 */
3790 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)
3791 {
3792 struct xdr_stream xdr;
3793 struct compound_hdr hdr;
3794 int status;
3795
3796 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3797 status = decode_compound_hdr(&xdr, &hdr);
3798 if (!status)
3799 status = decode_renew(&xdr);
3800 return status;
3801 }
3802
3803 /*
3804 * a SETCLIENTID request
3805 */
3806 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, uint32_t *p,
3807 struct nfs4_client *clp)
3808 {
3809 struct xdr_stream xdr;
3810 struct compound_hdr hdr;
3811 int status;
3812
3813 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3814 status = decode_compound_hdr(&xdr, &hdr);
3815 if (!status)
3816 status = decode_setclientid(&xdr, clp);
3817 if (!status)
3818 status = -nfs_stat_to_errno(hdr.status);
3819 return status;
3820 }
3821
3822 /*
3823 * a SETCLIENTID_CONFIRM request
3824 */
3825 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
3826 {
3827 struct xdr_stream xdr;
3828 struct compound_hdr hdr;
3829 int status;
3830
3831 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
3832 status = decode_compound_hdr(&xdr, &hdr);
3833 if (!status)
3834 status = decode_setclientid_confirm(&xdr);
3835 if (!status)
3836 status = decode_putrootfh(&xdr);
3837 if (!status)
3838 status = decode_fsinfo(&xdr, fsinfo);
3839 if (!status)
3840 status = -nfs_stat_to_errno(hdr.status);
3841 return status;
3842 }
3843
3844 /*
3845 * DELEGRETURN request
3846 */
3847 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)
3848 {
3849 struct xdr_stream xdr;
3850 struct compound_hdr hdr;
3851 int status;
3852
3853 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3854 status = decode_compound_hdr(&xdr, &hdr);
3855 if (status == 0) {
3856 status = decode_putfh(&xdr);
3857 if (status == 0)
3858 status = decode_delegreturn(&xdr);
3859 }
3860 return status;
3861 }
3862
3863 uint32_t *nfs4_decode_dirent(uint32_t *p, struct nfs_entry *entry, int plus)
3864 {
3865 uint32_t bitmap[2] = {0};
3866 uint32_t len;
3867
3868 if (!*p++) {
3869 if (!*p)
3870 return ERR_PTR(-EAGAIN);
3871 entry->eof = 1;
3872 return ERR_PTR(-EBADCOOKIE);
3873 }
3874
3875 entry->prev_cookie = entry->cookie;
3876 p = xdr_decode_hyper(p, &entry->cookie);
3877 entry->len = ntohl(*p++);
3878 entry->name = (const char *) p;
3879 p += XDR_QUADLEN(entry->len);
3880
3881 /*
3882 * In case the server doesn't return an inode number,
3883 * we fake one here. (We don't use inode number 0,
3884 * since glibc seems to choke on it...)
3885 */
3886 entry->ino = 1;
3887
3888 len = ntohl(*p++); /* bitmap length */
3889 if (len-- > 0) {
3890 bitmap[0] = ntohl(*p++);
3891 if (len-- > 0) {
3892 bitmap[1] = ntohl(*p++);
3893 p += len;
3894 }
3895 }
3896 len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
3897 if (len > 0) {
3898 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
3899 xdr_decode_hyper(p, &entry->ino);
3900 else if (bitmap[0] == FATTR4_WORD0_FILEID)
3901 xdr_decode_hyper(p, &entry->ino);
3902 p += len;
3903 }
3904
3905 entry->eof = !p[0] && p[1];
3906 return p;
3907 }
3908
3909 /*
3910 * We need to translate between nfs status return values and
3911 * the local errno values which may not be the same.
3912 */
3913 static struct {
3914 int stat;
3915 int errno;
3916 } nfs_errtbl[] = {
3917 { NFS4_OK, 0 },
3918 { NFS4ERR_PERM, EPERM },
3919 { NFS4ERR_NOENT, ENOENT },
3920 { NFS4ERR_IO, errno_NFSERR_IO },
3921 { NFS4ERR_NXIO, ENXIO },
3922 { NFS4ERR_ACCESS, EACCES },
3923 { NFS4ERR_EXIST, EEXIST },
3924 { NFS4ERR_XDEV, EXDEV },
3925 { NFS4ERR_NOTDIR, ENOTDIR },
3926 { NFS4ERR_ISDIR, EISDIR },
3927 { NFS4ERR_INVAL, EINVAL },
3928 { NFS4ERR_FBIG, EFBIG },
3929 { NFS4ERR_NOSPC, ENOSPC },
3930 { NFS4ERR_ROFS, EROFS },
3931 { NFS4ERR_MLINK, EMLINK },
3932 { NFS4ERR_NAMETOOLONG, ENAMETOOLONG },
3933 { NFS4ERR_NOTEMPTY, ENOTEMPTY },
3934 { NFS4ERR_DQUOT, EDQUOT },
3935 { NFS4ERR_STALE, ESTALE },
3936 { NFS4ERR_BADHANDLE, EBADHANDLE },
3937 { NFS4ERR_BAD_COOKIE, EBADCOOKIE },
3938 { NFS4ERR_NOTSUPP, ENOTSUPP },
3939 { NFS4ERR_TOOSMALL, ETOOSMALL },
3940 { NFS4ERR_SERVERFAULT, ESERVERFAULT },
3941 { NFS4ERR_BADTYPE, EBADTYPE },
3942 { NFS4ERR_LOCKED, EAGAIN },
3943 { NFS4ERR_RESOURCE, EREMOTEIO },
3944 { NFS4ERR_SYMLINK, ELOOP },
3945 { NFS4ERR_OP_ILLEGAL, EOPNOTSUPP },
3946 { NFS4ERR_DEADLOCK, EDEADLK },
3947 { NFS4ERR_WRONGSEC, EPERM }, /* FIXME: this needs
3948 * to be handled by a
3949 * middle-layer.
3950 */
3951 { -1, EIO }
3952 };
3953
3954 /*
3955 * Convert an NFS error code to a local one.
3956 * This one is used jointly by NFSv2 and NFSv3.
3957 */
3958 static int
3959 nfs_stat_to_errno(int stat)
3960 {
3961 int i;
3962 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
3963 if (nfs_errtbl[i].stat == stat)
3964 return nfs_errtbl[i].errno;
3965 }
3966 if (stat <= 10000 || stat > 10100) {
3967 /* The server is looney tunes. */
3968 return ESERVERFAULT;
3969 }
3970 /* If we cannot translate the error, the recovery routines should
3971 * handle it.
3972 * Note: remaining NFSv4 error codes have values > 10000, so should
3973 * not conflict with native Linux error codes.
3974 */
3975 return stat;
3976 }
3977
3978 #ifndef MAX
3979 # define MAX(a, b) (((a) > (b))? (a) : (b))
3980 #endif
3981
3982 #define PROC(proc, argtype, restype) \
3983 [NFSPROC4_CLNT_##proc] = { \
3984 .p_proc = NFSPROC4_COMPOUND, \
3985 .p_encode = (kxdrproc_t) nfs4_xdr_##argtype, \
3986 .p_decode = (kxdrproc_t) nfs4_xdr_##restype, \
3987 .p_bufsiz = MAX(NFS4_##argtype##_sz,NFS4_##restype##_sz) << 2, \
3988 }
3989
3990 struct rpc_procinfo nfs4_procedures[] = {
3991 PROC(READ, enc_read, dec_read),
3992 PROC(WRITE, enc_write, dec_write),
3993 PROC(COMMIT, enc_commit, dec_commit),
3994 PROC(OPEN, enc_open, dec_open),
3995 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
3996 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
3997 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
3998 PROC(CLOSE, enc_close, dec_close),
3999 PROC(SETATTR, enc_setattr, dec_setattr),
4000 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
4001 PROC(RENEW, enc_renew, dec_renew),
4002 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
4003 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
4004 PROC(LOCK, enc_lock, dec_lock),
4005 PROC(LOCKT, enc_lockt, dec_lockt),
4006 PROC(LOCKU, enc_locku, dec_locku),
4007 PROC(ACCESS, enc_access, dec_access),
4008 PROC(GETATTR, enc_getattr, dec_getattr),
4009 PROC(LOOKUP, enc_lookup, dec_lookup),
4010 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
4011 PROC(REMOVE, enc_remove, dec_remove),
4012 PROC(RENAME, enc_rename, dec_rename),
4013 PROC(LINK, enc_link, dec_link),
4014 PROC(SYMLINK, enc_symlink, dec_symlink),
4015 PROC(CREATE, enc_create, dec_create),
4016 PROC(PATHCONF, enc_pathconf, dec_pathconf),
4017 PROC(STATFS, enc_statfs, dec_statfs),
4018 PROC(READLINK, enc_readlink, dec_readlink),
4019 PROC(READDIR, enc_readdir, dec_readdir),
4020 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
4021 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
4022 };
4023
4024 struct rpc_version nfs_version4 = {
4025 .number = 4,
4026 .nrprocs = sizeof(nfs4_procedures)/sizeof(nfs4_procedures[0]),
4027 .procs = nfs4_procedures
4028 };
4029
4030 /*
4031 * Local variables:
4032 * c-basic-offset: 8
4033 * End:
4034 */
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