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USB: option: fix usage of urb->status abuse
[linux-2.6/kmemtrace.git] / fs / nfs / nfs4xdr.c
blob8003c91ccb9a0a5ca374f58dee3594b00615c5f0
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 #include "nfs4_fs.h"
55
56 #define NFSDBG_FACILITY NFSDBG_XDR
57
58 /* Mapping from NFS error code to "errno" error code. */
59 #define errno_NFSERR_IO EIO
60
61 static int nfs4_stat_to_errno(int);
62
63 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
64 #ifdef DEBUG
65 #define NFS4_MAXTAGLEN 20
66 #else
67 #define NFS4_MAXTAGLEN 0
68 #endif
69
70 /* lock,open owner id:
71 * we currently use size 1 (u32) out of (NFS4_OPAQUE_LIMIT >> 2)
72 */
73 #define owner_id_maxsz (1 + 1)
74 #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
75 #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
76 #define op_encode_hdr_maxsz (1)
77 #define op_decode_hdr_maxsz (2)
78 #define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
79 (NFS4_FHSIZE >> 2))
80 #define decode_putfh_maxsz (op_decode_hdr_maxsz)
81 #define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
82 #define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
83 #define encode_getfh_maxsz (op_encode_hdr_maxsz)
84 #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
85 ((3+NFS4_FHSIZE) >> 2))
86 #define nfs4_fattr_bitmap_maxsz 3
87 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
88 #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
89 #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
90 /* This is based on getfattr, which uses the most attributes: */
91 #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
92 3 + 3 + 3 + 2 * nfs4_name_maxsz))
93 #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
94 nfs4_fattr_value_maxsz)
95 #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
96 #define encode_savefh_maxsz (op_encode_hdr_maxsz)
97 #define decode_savefh_maxsz (op_decode_hdr_maxsz)
98 #define encode_restorefh_maxsz (op_encode_hdr_maxsz)
99 #define decode_restorefh_maxsz (op_decode_hdr_maxsz)
100 #define encode_fsinfo_maxsz (op_encode_hdr_maxsz + 2)
101 #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + 11)
102 #define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
103 #define decode_renew_maxsz (op_decode_hdr_maxsz)
104 #define encode_setclientid_maxsz \
105 (op_encode_hdr_maxsz + \
106 4 /*server->ip_addr*/ + \
107 1 /*Netid*/ + \
108 6 /*uaddr*/ + \
109 6 + (NFS4_VERIFIER_SIZE >> 2))
110 #define decode_setclientid_maxsz \
111 (op_decode_hdr_maxsz + \
112 2 + \
113 1024) /* large value for CLID_INUSE */
114 #define encode_setclientid_confirm_maxsz \
115 (op_encode_hdr_maxsz + \
116 3 + (NFS4_VERIFIER_SIZE >> 2))
117 #define decode_setclientid_confirm_maxsz \
118 (op_decode_hdr_maxsz)
119 #define encode_lookup_maxsz (op_encode_hdr_maxsz + \
120 1 + ((3 + NFS4_FHSIZE) >> 2))
121 #define encode_remove_maxsz (op_encode_hdr_maxsz + \
122 nfs4_name_maxsz)
123 #define encode_rename_maxsz (op_encode_hdr_maxsz + \
124 2 * nfs4_name_maxsz)
125 #define decode_rename_maxsz (op_decode_hdr_maxsz + 5 + 5)
126 #define encode_link_maxsz (op_encode_hdr_maxsz + \
127 nfs4_name_maxsz)
128 #define decode_link_maxsz (op_decode_hdr_maxsz + 5)
129 #define encode_symlink_maxsz (op_encode_hdr_maxsz + \
130 1 + nfs4_name_maxsz + \
131 1 + \
132 nfs4_fattr_maxsz)
133 #define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
134 #define encode_create_maxsz (op_encode_hdr_maxsz + \
135 2 + nfs4_name_maxsz + \
136 nfs4_fattr_maxsz)
137 #define decode_create_maxsz (op_decode_hdr_maxsz + 8)
138 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
139 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
140 #define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
141 #define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
142 #define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
143 encode_putfh_maxsz + \
144 op_encode_hdr_maxsz + 7)
145 #define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
146 decode_putfh_maxsz + \
147 op_decode_hdr_maxsz + 2)
148 #define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
149 encode_putfh_maxsz + \
150 op_encode_hdr_maxsz)
151 #define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
152 decode_putfh_maxsz + \
153 op_decode_hdr_maxsz)
154 #define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
155 encode_putfh_maxsz + \
156 op_encode_hdr_maxsz + 9)
157 #define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
158 decode_putfh_maxsz + \
159 op_decode_hdr_maxsz + 2)
160 #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
161 encode_putfh_maxsz + \
162 op_encode_hdr_maxsz + 8 + \
163 encode_getattr_maxsz)
164 #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
165 decode_putfh_maxsz + \
166 op_decode_hdr_maxsz + 4 + \
167 decode_getattr_maxsz)
168 #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
169 encode_putfh_maxsz + \
170 op_encode_hdr_maxsz + 3 + \
171 encode_getattr_maxsz)
172 #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
173 decode_putfh_maxsz + \
174 op_decode_hdr_maxsz + 2 + \
175 decode_getattr_maxsz)
176 #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
177 encode_putfh_maxsz + \
178 op_encode_hdr_maxsz + \
179 13 + 3 + 2 + 64 + \
180 encode_getattr_maxsz + \
181 encode_getfh_maxsz)
182 #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
183 decode_putfh_maxsz + \
184 op_decode_hdr_maxsz + 4 + 5 + 2 + 3 + \
185 decode_getattr_maxsz + \
186 decode_getfh_maxsz)
187 #define NFS4_enc_open_confirm_sz \
188 (compound_encode_hdr_maxsz + \
189 encode_putfh_maxsz + \
190 op_encode_hdr_maxsz + 5)
191 #define NFS4_dec_open_confirm_sz (compound_decode_hdr_maxsz + \
192 decode_putfh_maxsz + \
193 op_decode_hdr_maxsz + 4)
194 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
195 encode_putfh_maxsz + \
196 op_encode_hdr_maxsz + \
197 11)
198 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
199 decode_putfh_maxsz + \
200 op_decode_hdr_maxsz + \
201 4 + 5 + 2 + 3)
202 #define NFS4_enc_open_downgrade_sz \
203 (compound_encode_hdr_maxsz + \
204 encode_putfh_maxsz + \
205 op_encode_hdr_maxsz + 7 + \
206 encode_getattr_maxsz)
207 #define NFS4_dec_open_downgrade_sz \
208 (compound_decode_hdr_maxsz + \
209 decode_putfh_maxsz + \
210 op_decode_hdr_maxsz + 4 + \
211 decode_getattr_maxsz)
212 #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
213 encode_putfh_maxsz + \
214 op_encode_hdr_maxsz + 5 + \
215 encode_getattr_maxsz)
216 #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
217 decode_putfh_maxsz + \
218 op_decode_hdr_maxsz + 4 + \
219 decode_getattr_maxsz)
220 #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
221 encode_putfh_maxsz + \
222 op_encode_hdr_maxsz + 4 + \
223 nfs4_fattr_maxsz + \
224 encode_getattr_maxsz)
225 #define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
226 decode_putfh_maxsz + \
227 op_decode_hdr_maxsz + 3 + \
228 nfs4_fattr_maxsz)
229 #define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
230 encode_putfh_maxsz + \
231 encode_fsinfo_maxsz)
232 #define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
233 decode_putfh_maxsz + \
234 decode_fsinfo_maxsz)
235 #define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
236 encode_renew_maxsz)
237 #define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
238 decode_renew_maxsz)
239 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
240 encode_setclientid_maxsz)
241 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
242 decode_setclientid_maxsz)
243 #define NFS4_enc_setclientid_confirm_sz \
244 (compound_encode_hdr_maxsz + \
245 encode_setclientid_confirm_maxsz + \
246 encode_putrootfh_maxsz + \
247 encode_fsinfo_maxsz)
248 #define NFS4_dec_setclientid_confirm_sz \
249 (compound_decode_hdr_maxsz + \
250 decode_setclientid_confirm_maxsz + \
251 decode_putrootfh_maxsz + \
252 decode_fsinfo_maxsz)
253 #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
254 encode_putfh_maxsz + \
255 encode_getattr_maxsz + \
256 op_encode_hdr_maxsz + \
257 1 + 1 + 2 + 2 + \
258 1 + 4 + 1 + 2 + \
259 owner_id_maxsz)
260 #define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
261 decode_putfh_maxsz + \
262 decode_getattr_maxsz + \
263 op_decode_hdr_maxsz + \
264 2 + 2 + 1 + 2 + \
265 owner_id_maxsz)
266 #define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
267 encode_putfh_maxsz + \
268 encode_getattr_maxsz + \
269 op_encode_hdr_maxsz + \
270 1 + 2 + 2 + 2 + \
271 owner_id_maxsz)
272 #define NFS4_dec_lockt_sz (NFS4_dec_lock_sz)
273 #define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
274 encode_putfh_maxsz + \
275 encode_getattr_maxsz + \
276 op_encode_hdr_maxsz + \
277 1 + 1 + 4 + 2 + 2)
278 #define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
279 decode_putfh_maxsz + \
280 decode_getattr_maxsz + \
281 op_decode_hdr_maxsz + 4)
282 #define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
283 encode_putfh_maxsz + \
284 op_encode_hdr_maxsz + 1)
285 #define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
286 decode_putfh_maxsz + \
287 op_decode_hdr_maxsz + 2)
288 #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
289 encode_putfh_maxsz + \
290 encode_getattr_maxsz)
291 #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
292 decode_putfh_maxsz + \
293 decode_getattr_maxsz)
294 #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
295 encode_putfh_maxsz + \
296 encode_lookup_maxsz + \
297 encode_getattr_maxsz + \
298 encode_getfh_maxsz)
299 #define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
300 decode_putfh_maxsz + \
301 op_decode_hdr_maxsz + \
302 decode_getattr_maxsz + \
303 decode_getfh_maxsz)
304 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
305 encode_putrootfh_maxsz + \
306 encode_getattr_maxsz + \
307 encode_getfh_maxsz)
308 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
309 decode_putrootfh_maxsz + \
310 decode_getattr_maxsz + \
311 decode_getfh_maxsz)
312 #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
313 encode_putfh_maxsz + \
314 encode_remove_maxsz + \
315 encode_getattr_maxsz)
316 #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
317 decode_putfh_maxsz + \
318 op_decode_hdr_maxsz + 5 + \
319 decode_getattr_maxsz)
320 #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
321 encode_putfh_maxsz + \
322 encode_savefh_maxsz + \
323 encode_putfh_maxsz + \
324 encode_rename_maxsz + \
325 encode_getattr_maxsz + \
326 encode_restorefh_maxsz + \
327 encode_getattr_maxsz)
328 #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
329 decode_putfh_maxsz + \
330 decode_savefh_maxsz + \
331 decode_putfh_maxsz + \
332 decode_rename_maxsz + \
333 decode_getattr_maxsz + \
334 decode_restorefh_maxsz + \
335 decode_getattr_maxsz)
336 #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
337 encode_putfh_maxsz + \
338 encode_savefh_maxsz + \
339 encode_putfh_maxsz + \
340 encode_link_maxsz + \
341 decode_getattr_maxsz + \
342 encode_restorefh_maxsz + \
343 decode_getattr_maxsz)
344 #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
345 decode_putfh_maxsz + \
346 decode_savefh_maxsz + \
347 decode_putfh_maxsz + \
348 decode_link_maxsz + \
349 decode_getattr_maxsz + \
350 decode_restorefh_maxsz + \
351 decode_getattr_maxsz)
352 #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
353 encode_putfh_maxsz + \
354 encode_symlink_maxsz + \
355 encode_getattr_maxsz + \
356 encode_getfh_maxsz)
357 #define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
358 decode_putfh_maxsz + \
359 decode_symlink_maxsz + \
360 decode_getattr_maxsz + \
361 decode_getfh_maxsz)
362 #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
363 encode_putfh_maxsz + \
364 encode_savefh_maxsz + \
365 encode_create_maxsz + \
366 encode_getfh_maxsz + \
367 encode_getattr_maxsz + \
368 encode_restorefh_maxsz + \
369 encode_getattr_maxsz)
370 #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
371 decode_putfh_maxsz + \
372 decode_savefh_maxsz + \
373 decode_create_maxsz + \
374 decode_getfh_maxsz + \
375 decode_getattr_maxsz + \
376 decode_restorefh_maxsz + \
377 decode_getattr_maxsz)
378 #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
379 encode_putfh_maxsz + \
380 encode_getattr_maxsz)
381 #define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
382 decode_putfh_maxsz + \
383 decode_getattr_maxsz)
384 #define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
385 encode_putfh_maxsz + \
386 encode_getattr_maxsz)
387 #define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
388 decode_putfh_maxsz + \
389 op_decode_hdr_maxsz + 12)
390 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
391 encode_putfh_maxsz + \
392 encode_getattr_maxsz)
393 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
394 decode_putfh_maxsz + \
395 decode_getattr_maxsz)
396 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
397 encode_putfh_maxsz + \
398 encode_delegreturn_maxsz + \
399 encode_getattr_maxsz)
400 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
401 decode_delegreturn_maxsz + \
402 decode_getattr_maxsz)
403 #define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
404 encode_putfh_maxsz + \
405 encode_getattr_maxsz)
406 #define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
407 decode_putfh_maxsz + \
408 op_decode_hdr_maxsz + \
409 nfs4_fattr_bitmap_maxsz + 1)
410 #define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
411 encode_putfh_maxsz + \
412 op_encode_hdr_maxsz + 4 + \
413 nfs4_fattr_bitmap_maxsz + 1)
414 #define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
415 decode_putfh_maxsz + \
416 op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
417 #define NFS4_enc_fs_locations_sz \
418 (compound_encode_hdr_maxsz + \
419 encode_putfh_maxsz + \
420 encode_getattr_maxsz)
421 #define NFS4_dec_fs_locations_sz \
422 (compound_decode_hdr_maxsz + \
423 decode_putfh_maxsz + \
424 op_decode_hdr_maxsz + \
425 nfs4_fattr_bitmap_maxsz)
426
427 static struct {
428 unsigned int mode;
429 unsigned int nfs2type;
430 } nfs_type2fmt[] = {
431 { 0, NFNON },
432 { S_IFREG, NFREG },
433 { S_IFDIR, NFDIR },
434 { S_IFBLK, NFBLK },
435 { S_IFCHR, NFCHR },
436 { S_IFLNK, NFLNK },
437 { S_IFSOCK, NFSOCK },
438 { S_IFIFO, NFFIFO },
439 { 0, NFNON },
440 { 0, NFNON },
441 };
442
443 struct compound_hdr {
444 int32_t status;
445 uint32_t nops;
446 uint32_t taglen;
447 char * tag;
448 };
449
450 /*
451 * START OF "GENERIC" ENCODE ROUTINES.
452 * These may look a little ugly since they are imported from a "generic"
453 * set of XDR encode/decode routines which are intended to be shared by
454 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
455 *
456 * If the pain of reading these is too great, it should be a straightforward
457 * task to translate them into Linux-specific versions which are more
458 * consistent with the style used in NFSv2/v3...
459 */
460 #define WRITE32(n) *p++ = htonl(n)
461 #define WRITE64(n) do { \
462 *p++ = htonl((uint32_t)((n) >> 32)); \
463 *p++ = htonl((uint32_t)(n)); \
464 } while (0)
465 #define WRITEMEM(ptr,nbytes) do { \
466 p = xdr_encode_opaque_fixed(p, ptr, nbytes); \
467 } while (0)
468
469 #define RESERVE_SPACE(nbytes) do { \
470 p = xdr_reserve_space(xdr, nbytes); \
471 if (!p) printk("RESERVE_SPACE(%d) failed in function %s\n", (int) (nbytes), __FUNCTION__); \
472 BUG_ON(!p); \
473 } while (0)
474
475 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
476 {
477 __be32 *p;
478
479 p = xdr_reserve_space(xdr, 4 + len);
480 BUG_ON(p == NULL);
481 xdr_encode_opaque(p, str, len);
482 }
483
484 static int encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
485 {
486 __be32 *p;
487
488 dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
489 BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
490 RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
491 WRITE32(hdr->taglen);
492 WRITEMEM(hdr->tag, hdr->taglen);
493 WRITE32(NFS4_MINOR_VERSION);
494 WRITE32(hdr->nops);
495 return 0;
496 }
497
498 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
499 {
500 __be32 *p;
501
502 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
503 BUG_ON(p == NULL);
504 xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
505 }
506
507 static int encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
508 {
509 char owner_name[IDMAP_NAMESZ];
510 char owner_group[IDMAP_NAMESZ];
511 int owner_namelen = 0;
512 int owner_grouplen = 0;
513 __be32 *p;
514 __be32 *q;
515 int len;
516 uint32_t bmval0 = 0;
517 uint32_t bmval1 = 0;
518 int status;
519
520 /*
521 * We reserve enough space to write the entire attribute buffer at once.
522 * In the worst-case, this would be
523 * 12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
524 * = 36 bytes, plus any contribution from variable-length fields
525 * such as owner/group.
526 */
527 len = 16;
528
529 /* Sigh */
530 if (iap->ia_valid & ATTR_SIZE)
531 len += 8;
532 if (iap->ia_valid & ATTR_MODE)
533 len += 4;
534 if (iap->ia_valid & ATTR_UID) {
535 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
536 if (owner_namelen < 0) {
537 printk(KERN_WARNING "nfs: couldn't resolve uid %d to string\n",
538 iap->ia_uid);
539 /* XXX */
540 strcpy(owner_name, "nobody");
541 owner_namelen = sizeof("nobody") - 1;
542 /* goto out; */
543 }
544 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
545 }
546 if (iap->ia_valid & ATTR_GID) {
547 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
548 if (owner_grouplen < 0) {
549 printk(KERN_WARNING "nfs4: couldn't resolve gid %d to string\n",
550 iap->ia_gid);
551 strcpy(owner_group, "nobody");
552 owner_grouplen = sizeof("nobody") - 1;
553 /* goto out; */
554 }
555 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
556 }
557 if (iap->ia_valid & ATTR_ATIME_SET)
558 len += 16;
559 else if (iap->ia_valid & ATTR_ATIME)
560 len += 4;
561 if (iap->ia_valid & ATTR_MTIME_SET)
562 len += 16;
563 else if (iap->ia_valid & ATTR_MTIME)
564 len += 4;
565 RESERVE_SPACE(len);
566
567 /*
568 * We write the bitmap length now, but leave the bitmap and the attribute
569 * buffer length to be backfilled at the end of this routine.
570 */
571 WRITE32(2);
572 q = p;
573 p += 3;
574
575 if (iap->ia_valid & ATTR_SIZE) {
576 bmval0 |= FATTR4_WORD0_SIZE;
577 WRITE64(iap->ia_size);
578 }
579 if (iap->ia_valid & ATTR_MODE) {
580 bmval1 |= FATTR4_WORD1_MODE;
581 WRITE32(iap->ia_mode & S_IALLUGO);
582 }
583 if (iap->ia_valid & ATTR_UID) {
584 bmval1 |= FATTR4_WORD1_OWNER;
585 WRITE32(owner_namelen);
586 WRITEMEM(owner_name, owner_namelen);
587 }
588 if (iap->ia_valid & ATTR_GID) {
589 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
590 WRITE32(owner_grouplen);
591 WRITEMEM(owner_group, owner_grouplen);
592 }
593 if (iap->ia_valid & ATTR_ATIME_SET) {
594 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
595 WRITE32(NFS4_SET_TO_CLIENT_TIME);
596 WRITE32(0);
597 WRITE32(iap->ia_mtime.tv_sec);
598 WRITE32(iap->ia_mtime.tv_nsec);
599 }
600 else if (iap->ia_valid & ATTR_ATIME) {
601 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
602 WRITE32(NFS4_SET_TO_SERVER_TIME);
603 }
604 if (iap->ia_valid & ATTR_MTIME_SET) {
605 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
606 WRITE32(NFS4_SET_TO_CLIENT_TIME);
607 WRITE32(0);
608 WRITE32(iap->ia_mtime.tv_sec);
609 WRITE32(iap->ia_mtime.tv_nsec);
610 }
611 else if (iap->ia_valid & ATTR_MTIME) {
612 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
613 WRITE32(NFS4_SET_TO_SERVER_TIME);
614 }
615
616 /*
617 * Now we backfill the bitmap and the attribute buffer length.
618 */
619 if (len != ((char *)p - (char *)q) + 4) {
620 printk ("encode_attr: Attr length calculation error! %u != %Zu\n",
621 len, ((char *)p - (char *)q) + 4);
622 BUG();
623 }
624 len = (char *)p - (char *)q - 12;
625 *q++ = htonl(bmval0);
626 *q++ = htonl(bmval1);
627 *q++ = htonl(len);
628
629 status = 0;
630 /* out: */
631 return status;
632 }
633
634 static int encode_access(struct xdr_stream *xdr, u32 access)
635 {
636 __be32 *p;
637
638 RESERVE_SPACE(8);
639 WRITE32(OP_ACCESS);
640 WRITE32(access);
641
642 return 0;
643 }
644
645 static int encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
646 {
647 __be32 *p;
648
649 RESERVE_SPACE(8+NFS4_STATEID_SIZE);
650 WRITE32(OP_CLOSE);
651 WRITE32(arg->seqid->sequence->counter);
652 WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
653
654 return 0;
655 }
656
657 static int encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args)
658 {
659 __be32 *p;
660
661 RESERVE_SPACE(16);
662 WRITE32(OP_COMMIT);
663 WRITE64(args->offset);
664 WRITE32(args->count);
665
666 return 0;
667 }
668
669 static int encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create)
670 {
671 __be32 *p;
672
673 RESERVE_SPACE(8);
674 WRITE32(OP_CREATE);
675 WRITE32(create->ftype);
676
677 switch (create->ftype) {
678 case NF4LNK:
679 RESERVE_SPACE(4);
680 WRITE32(create->u.symlink.len);
681 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
682 break;
683
684 case NF4BLK: case NF4CHR:
685 RESERVE_SPACE(8);
686 WRITE32(create->u.device.specdata1);
687 WRITE32(create->u.device.specdata2);
688 break;
689
690 default:
691 break;
692 }
693
694 RESERVE_SPACE(4 + create->name->len);
695 WRITE32(create->name->len);
696 WRITEMEM(create->name->name, create->name->len);
697
698 return encode_attrs(xdr, create->attrs, create->server);
699 }
700
701 static int encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap)
702 {
703 __be32 *p;
704
705 RESERVE_SPACE(12);
706 WRITE32(OP_GETATTR);
707 WRITE32(1);
708 WRITE32(bitmap);
709 return 0;
710 }
711
712 static int encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1)
713 {
714 __be32 *p;
715
716 RESERVE_SPACE(16);
717 WRITE32(OP_GETATTR);
718 WRITE32(2);
719 WRITE32(bm0);
720 WRITE32(bm1);
721 return 0;
722 }
723
724 static int encode_getfattr(struct xdr_stream *xdr, const u32* bitmask)
725 {
726 return encode_getattr_two(xdr,
727 bitmask[0] & nfs4_fattr_bitmap[0],
728 bitmask[1] & nfs4_fattr_bitmap[1]);
729 }
730
731 static int encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask)
732 {
733 return encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
734 bitmask[1] & nfs4_fsinfo_bitmap[1]);
735 }
736
737 static int encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask)
738 {
739 return encode_getattr_two(xdr,
740 bitmask[0] & nfs4_fs_locations_bitmap[0],
741 bitmask[1] & nfs4_fs_locations_bitmap[1]);
742 }
743
744 static int encode_getfh(struct xdr_stream *xdr)
745 {
746 __be32 *p;
747
748 RESERVE_SPACE(4);
749 WRITE32(OP_GETFH);
750
751 return 0;
752 }
753
754 static int encode_link(struct xdr_stream *xdr, const struct qstr *name)
755 {
756 __be32 *p;
757
758 RESERVE_SPACE(8 + name->len);
759 WRITE32(OP_LINK);
760 WRITE32(name->len);
761 WRITEMEM(name->name, name->len);
762
763 return 0;
764 }
765
766 static inline int nfs4_lock_type(struct file_lock *fl, int block)
767 {
768 if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
769 return block ? NFS4_READW_LT : NFS4_READ_LT;
770 return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
771 }
772
773 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
774 {
775 if (fl->fl_end == OFFSET_MAX)
776 return ~(uint64_t)0;
777 return fl->fl_end - fl->fl_start + 1;
778 }
779
780 /*
781 * opcode,type,reclaim,offset,length,new_lock_owner = 32
782 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
783 */
784 static int encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args)
785 {
786 __be32 *p;
787
788 RESERVE_SPACE(32);
789 WRITE32(OP_LOCK);
790 WRITE32(nfs4_lock_type(args->fl, args->block));
791 WRITE32(args->reclaim);
792 WRITE64(args->fl->fl_start);
793 WRITE64(nfs4_lock_length(args->fl));
794 WRITE32(args->new_lock_owner);
795 if (args->new_lock_owner){
796 RESERVE_SPACE(4+NFS4_STATEID_SIZE+20);
797 WRITE32(args->open_seqid->sequence->counter);
798 WRITEMEM(args->open_stateid->data, NFS4_STATEID_SIZE);
799 WRITE32(args->lock_seqid->sequence->counter);
800 WRITE64(args->lock_owner.clientid);
801 WRITE32(4);
802 WRITE32(args->lock_owner.id);
803 }
804 else {
805 RESERVE_SPACE(NFS4_STATEID_SIZE+4);
806 WRITEMEM(args->lock_stateid->data, NFS4_STATEID_SIZE);
807 WRITE32(args->lock_seqid->sequence->counter);
808 }
809
810 return 0;
811 }
812
813 static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args)
814 {
815 __be32 *p;
816
817 RESERVE_SPACE(40);
818 WRITE32(OP_LOCKT);
819 WRITE32(nfs4_lock_type(args->fl, 0));
820 WRITE64(args->fl->fl_start);
821 WRITE64(nfs4_lock_length(args->fl));
822 WRITE64(args->lock_owner.clientid);
823 WRITE32(4);
824 WRITE32(args->lock_owner.id);
825
826 return 0;
827 }
828
829 static int encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args)
830 {
831 __be32 *p;
832
833 RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
834 WRITE32(OP_LOCKU);
835 WRITE32(nfs4_lock_type(args->fl, 0));
836 WRITE32(args->seqid->sequence->counter);
837 WRITEMEM(args->stateid->data, NFS4_STATEID_SIZE);
838 WRITE64(args->fl->fl_start);
839 WRITE64(nfs4_lock_length(args->fl));
840
841 return 0;
842 }
843
844 static int encode_lookup(struct xdr_stream *xdr, const struct qstr *name)
845 {
846 int len = name->len;
847 __be32 *p;
848
849 RESERVE_SPACE(8 + len);
850 WRITE32(OP_LOOKUP);
851 WRITE32(len);
852 WRITEMEM(name->name, len);
853
854 return 0;
855 }
856
857 static void encode_share_access(struct xdr_stream *xdr, int open_flags)
858 {
859 __be32 *p;
860
861 RESERVE_SPACE(8);
862 switch (open_flags & (FMODE_READ|FMODE_WRITE)) {
863 case FMODE_READ:
864 WRITE32(NFS4_SHARE_ACCESS_READ);
865 break;
866 case FMODE_WRITE:
867 WRITE32(NFS4_SHARE_ACCESS_WRITE);
868 break;
869 case FMODE_READ|FMODE_WRITE:
870 WRITE32(NFS4_SHARE_ACCESS_BOTH);
871 break;
872 default:
873 BUG();
874 }
875 WRITE32(0); /* for linux, share_deny = 0 always */
876 }
877
878 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
879 {
880 __be32 *p;
881 /*
882 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
883 * owner 4 = 32
884 */
885 RESERVE_SPACE(8);
886 WRITE32(OP_OPEN);
887 WRITE32(arg->seqid->sequence->counter);
888 encode_share_access(xdr, arg->open_flags);
889 RESERVE_SPACE(16);
890 WRITE64(arg->clientid);
891 WRITE32(4);
892 WRITE32(arg->id);
893 }
894
895 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
896 {
897 __be32 *p;
898
899 RESERVE_SPACE(4);
900 switch(arg->open_flags & O_EXCL) {
901 case 0:
902 WRITE32(NFS4_CREATE_UNCHECKED);
903 encode_attrs(xdr, arg->u.attrs, arg->server);
904 break;
905 default:
906 WRITE32(NFS4_CREATE_EXCLUSIVE);
907 encode_nfs4_verifier(xdr, &arg->u.verifier);
908 }
909 }
910
911 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
912 {
913 __be32 *p;
914
915 RESERVE_SPACE(4);
916 switch (arg->open_flags & O_CREAT) {
917 case 0:
918 WRITE32(NFS4_OPEN_NOCREATE);
919 break;
920 default:
921 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
922 WRITE32(NFS4_OPEN_CREATE);
923 encode_createmode(xdr, arg);
924 }
925 }
926
927 static inline void encode_delegation_type(struct xdr_stream *xdr, int delegation_type)
928 {
929 __be32 *p;
930
931 RESERVE_SPACE(4);
932 switch (delegation_type) {
933 case 0:
934 WRITE32(NFS4_OPEN_DELEGATE_NONE);
935 break;
936 case FMODE_READ:
937 WRITE32(NFS4_OPEN_DELEGATE_READ);
938 break;
939 case FMODE_WRITE|FMODE_READ:
940 WRITE32(NFS4_OPEN_DELEGATE_WRITE);
941 break;
942 default:
943 BUG();
944 }
945 }
946
947 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
948 {
949 __be32 *p;
950
951 RESERVE_SPACE(4);
952 WRITE32(NFS4_OPEN_CLAIM_NULL);
953 encode_string(xdr, name->len, name->name);
954 }
955
956 static inline void encode_claim_previous(struct xdr_stream *xdr, int type)
957 {
958 __be32 *p;
959
960 RESERVE_SPACE(4);
961 WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
962 encode_delegation_type(xdr, type);
963 }
964
965 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
966 {
967 __be32 *p;
968
969 RESERVE_SPACE(4+NFS4_STATEID_SIZE);
970 WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
971 WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
972 encode_string(xdr, name->len, name->name);
973 }
974
975 static int encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg)
976 {
977 encode_openhdr(xdr, arg);
978 encode_opentype(xdr, arg);
979 switch (arg->claim) {
980 case NFS4_OPEN_CLAIM_NULL:
981 encode_claim_null(xdr, arg->name);
982 break;
983 case NFS4_OPEN_CLAIM_PREVIOUS:
984 encode_claim_previous(xdr, arg->u.delegation_type);
985 break;
986 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
987 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
988 break;
989 default:
990 BUG();
991 }
992 return 0;
993 }
994
995 static int encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg)
996 {
997 __be32 *p;
998
999 RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1000 WRITE32(OP_OPEN_CONFIRM);
1001 WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1002 WRITE32(arg->seqid->sequence->counter);
1003
1004 return 0;
1005 }
1006
1007 static int encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
1008 {
1009 __be32 *p;
1010
1011 RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1012 WRITE32(OP_OPEN_DOWNGRADE);
1013 WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1014 WRITE32(arg->seqid->sequence->counter);
1015 encode_share_access(xdr, arg->open_flags);
1016 return 0;
1017 }
1018
1019 static int
1020 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh)
1021 {
1022 int len = fh->size;
1023 __be32 *p;
1024
1025 RESERVE_SPACE(8 + len);
1026 WRITE32(OP_PUTFH);
1027 WRITE32(len);
1028 WRITEMEM(fh->data, len);
1029
1030 return 0;
1031 }
1032
1033 static int encode_putrootfh(struct xdr_stream *xdr)
1034 {
1035 __be32 *p;
1036
1037 RESERVE_SPACE(4);
1038 WRITE32(OP_PUTROOTFH);
1039
1040 return 0;
1041 }
1042
1043 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1044 {
1045 nfs4_stateid stateid;
1046 __be32 *p;
1047
1048 RESERVE_SPACE(NFS4_STATEID_SIZE);
1049 if (ctx->state != NULL) {
1050 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1051 WRITEMEM(stateid.data, NFS4_STATEID_SIZE);
1052 } else
1053 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1054 }
1055
1056 static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args)
1057 {
1058 __be32 *p;
1059
1060 RESERVE_SPACE(4);
1061 WRITE32(OP_READ);
1062
1063 encode_stateid(xdr, args->context);
1064
1065 RESERVE_SPACE(12);
1066 WRITE64(args->offset);
1067 WRITE32(args->count);
1068
1069 return 0;
1070 }
1071
1072 static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req)
1073 {
1074 struct rpc_auth *auth = req->rq_task->tk_auth;
1075 uint32_t attrs[2] = {
1076 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1077 FATTR4_WORD1_MOUNTED_ON_FILEID,
1078 };
1079 int replen;
1080 __be32 *p;
1081
1082 RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
1083 WRITE32(OP_READDIR);
1084 WRITE64(readdir->cookie);
1085 WRITEMEM(readdir->verifier.data, NFS4_VERIFIER_SIZE);
1086 WRITE32(readdir->count >> 1); /* We're not doing readdirplus */
1087 WRITE32(readdir->count);
1088 WRITE32(2);
1089 /* Switch to mounted_on_fileid if the server supports it */
1090 if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1091 attrs[0] &= ~FATTR4_WORD0_FILEID;
1092 else
1093 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1094 WRITE32(attrs[0] & readdir->bitmask[0]);
1095 WRITE32(attrs[1] & readdir->bitmask[1]);
1096 dprintk("%s: cookie = %Lu, verifier = 0x%x%x, bitmap = 0x%x%x\n",
1097 __FUNCTION__,
1098 (unsigned long long)readdir->cookie,
1099 ((u32 *)readdir->verifier.data)[0],
1100 ((u32 *)readdir->verifier.data)[1],
1101 attrs[0] & readdir->bitmask[0],
1102 attrs[1] & readdir->bitmask[1]);
1103
1104 /* set up reply kvec
1105 * toplevel_status + taglen + rescount + OP_PUTFH + status
1106 * + OP_READDIR + status + verifer(2) = 9
1107 */
1108 replen = (RPC_REPHDRSIZE + auth->au_rslack + 9) << 2;
1109 xdr_inline_pages(&req->rq_rcv_buf, replen, readdir->pages,
1110 readdir->pgbase, readdir->count);
1111 dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1112 __FUNCTION__, replen, readdir->pages,
1113 readdir->pgbase, readdir->count);
1114
1115 return 0;
1116 }
1117
1118 static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
1119 {
1120 struct rpc_auth *auth = req->rq_task->tk_auth;
1121 unsigned int replen;
1122 __be32 *p;
1123
1124 RESERVE_SPACE(4);
1125 WRITE32(OP_READLINK);
1126
1127 /* set up reply kvec
1128 * toplevel_status + taglen + rescount + OP_PUTFH + status
1129 * + OP_READLINK + status + string length = 8
1130 */
1131 replen = (RPC_REPHDRSIZE + auth->au_rslack + 8) << 2;
1132 xdr_inline_pages(&req->rq_rcv_buf, replen, readlink->pages,
1133 readlink->pgbase, readlink->pglen);
1134
1135 return 0;
1136 }
1137
1138 static int encode_remove(struct xdr_stream *xdr, const struct qstr *name)
1139 {
1140 __be32 *p;
1141
1142 RESERVE_SPACE(8 + name->len);
1143 WRITE32(OP_REMOVE);
1144 WRITE32(name->len);
1145 WRITEMEM(name->name, name->len);
1146
1147 return 0;
1148 }
1149
1150 static int encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname)
1151 {
1152 __be32 *p;
1153
1154 RESERVE_SPACE(8 + oldname->len);
1155 WRITE32(OP_RENAME);
1156 WRITE32(oldname->len);
1157 WRITEMEM(oldname->name, oldname->len);
1158
1159 RESERVE_SPACE(4 + newname->len);
1160 WRITE32(newname->len);
1161 WRITEMEM(newname->name, newname->len);
1162
1163 return 0;
1164 }
1165
1166 static int encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid)
1167 {
1168 __be32 *p;
1169
1170 RESERVE_SPACE(12);
1171 WRITE32(OP_RENEW);
1172 WRITE64(client_stateid->cl_clientid);
1173
1174 return 0;
1175 }
1176
1177 static int
1178 encode_restorefh(struct xdr_stream *xdr)
1179 {
1180 __be32 *p;
1181
1182 RESERVE_SPACE(4);
1183 WRITE32(OP_RESTOREFH);
1184
1185 return 0;
1186 }
1187
1188 static int
1189 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg)
1190 {
1191 __be32 *p;
1192
1193 RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1194 WRITE32(OP_SETATTR);
1195 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1196 RESERVE_SPACE(2*4);
1197 WRITE32(1);
1198 WRITE32(FATTR4_WORD0_ACL);
1199 if (arg->acl_len % 4)
1200 return -EINVAL;
1201 RESERVE_SPACE(4);
1202 WRITE32(arg->acl_len);
1203 xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1204 return 0;
1205 }
1206
1207 static int
1208 encode_savefh(struct xdr_stream *xdr)
1209 {
1210 __be32 *p;
1211
1212 RESERVE_SPACE(4);
1213 WRITE32(OP_SAVEFH);
1214
1215 return 0;
1216 }
1217
1218 static int encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server)
1219 {
1220 int status;
1221 __be32 *p;
1222
1223 RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1224 WRITE32(OP_SETATTR);
1225 WRITEMEM(arg->stateid.data, NFS4_STATEID_SIZE);
1226
1227 if ((status = encode_attrs(xdr, arg->iap, server)))
1228 return status;
1229
1230 return 0;
1231 }
1232
1233 static int encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid)
1234 {
1235 __be32 *p;
1236
1237 RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
1238 WRITE32(OP_SETCLIENTID);
1239 WRITEMEM(setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1240
1241 encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1242 RESERVE_SPACE(4);
1243 WRITE32(setclientid->sc_prog);
1244 encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1245 encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1246 RESERVE_SPACE(4);
1247 WRITE32(setclientid->sc_cb_ident);
1248
1249 return 0;
1250 }
1251
1252 static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state)
1253 {
1254 __be32 *p;
1255
1256 RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
1257 WRITE32(OP_SETCLIENTID_CONFIRM);
1258 WRITE64(client_state->cl_clientid);
1259 WRITEMEM(client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1260
1261 return 0;
1262 }
1263
1264 static int encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args)
1265 {
1266 __be32 *p;
1267
1268 RESERVE_SPACE(4);
1269 WRITE32(OP_WRITE);
1270
1271 encode_stateid(xdr, args->context);
1272
1273 RESERVE_SPACE(16);
1274 WRITE64(args->offset);
1275 WRITE32(args->stable);
1276 WRITE32(args->count);
1277
1278 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1279
1280 return 0;
1281 }
1282
1283 static int encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1284 {
1285 __be32 *p;
1286
1287 RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1288
1289 WRITE32(OP_DELEGRETURN);
1290 WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1291 return 0;
1292
1293 }
1294 /*
1295 * END OF "GENERIC" ENCODE ROUTINES.
1296 */
1297
1298 /*
1299 * Encode an ACCESS request
1300 */
1301 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1302 {
1303 struct xdr_stream xdr;
1304 struct compound_hdr hdr = {
1305 .nops = 2,
1306 };
1307 int status;
1308
1309 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1310 encode_compound_hdr(&xdr, &hdr);
1311 if ((status = encode_putfh(&xdr, args->fh)) == 0)
1312 status = encode_access(&xdr, args->access);
1313 return status;
1314 }
1315
1316 /*
1317 * Encode LOOKUP request
1318 */
1319 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1320 {
1321 struct xdr_stream xdr;
1322 struct compound_hdr hdr = {
1323 .nops = 4,
1324 };
1325 int status;
1326
1327 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1328 encode_compound_hdr(&xdr, &hdr);
1329 if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1330 goto out;
1331 if ((status = encode_lookup(&xdr, args->name)) != 0)
1332 goto out;
1333 if ((status = encode_getfh(&xdr)) != 0)
1334 goto out;
1335 status = encode_getfattr(&xdr, args->bitmask);
1336 out:
1337 return status;
1338 }
1339
1340 /*
1341 * Encode LOOKUP_ROOT request
1342 */
1343 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1344 {
1345 struct xdr_stream xdr;
1346 struct compound_hdr hdr = {
1347 .nops = 3,
1348 };
1349 int status;
1350
1351 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1352 encode_compound_hdr(&xdr, &hdr);
1353 if ((status = encode_putrootfh(&xdr)) != 0)
1354 goto out;
1355 if ((status = encode_getfh(&xdr)) == 0)
1356 status = encode_getfattr(&xdr, args->bitmask);
1357 out:
1358 return status;
1359 }
1360
1361 /*
1362 * Encode REMOVE request
1363 */
1364 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs4_remove_arg *args)
1365 {
1366 struct xdr_stream xdr;
1367 struct compound_hdr hdr = {
1368 .nops = 3,
1369 };
1370 int status;
1371
1372 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1373 encode_compound_hdr(&xdr, &hdr);
1374 if ((status = encode_putfh(&xdr, args->fh)) != 0)
1375 goto out;
1376 if ((status = encode_remove(&xdr, args->name)) != 0)
1377 goto out;
1378 status = encode_getfattr(&xdr, args->bitmask);
1379 out:
1380 return status;
1381 }
1382
1383 /*
1384 * Encode RENAME request
1385 */
1386 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1387 {
1388 struct xdr_stream xdr;
1389 struct compound_hdr hdr = {
1390 .nops = 7,
1391 };
1392 int status;
1393
1394 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1395 encode_compound_hdr(&xdr, &hdr);
1396 if ((status = encode_putfh(&xdr, args->old_dir)) != 0)
1397 goto out;
1398 if ((status = encode_savefh(&xdr)) != 0)
1399 goto out;
1400 if ((status = encode_putfh(&xdr, args->new_dir)) != 0)
1401 goto out;
1402 if ((status = encode_rename(&xdr, args->old_name, args->new_name)) != 0)
1403 goto out;
1404 if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1405 goto out;
1406 if ((status = encode_restorefh(&xdr)) != 0)
1407 goto out;
1408 status = encode_getfattr(&xdr, args->bitmask);
1409 out:
1410 return status;
1411 }
1412
1413 /*
1414 * Encode LINK request
1415 */
1416 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1417 {
1418 struct xdr_stream xdr;
1419 struct compound_hdr hdr = {
1420 .nops = 7,
1421 };
1422 int status;
1423
1424 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1425 encode_compound_hdr(&xdr, &hdr);
1426 if ((status = encode_putfh(&xdr, args->fh)) != 0)
1427 goto out;
1428 if ((status = encode_savefh(&xdr)) != 0)
1429 goto out;
1430 if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1431 goto out;
1432 if ((status = encode_link(&xdr, args->name)) != 0)
1433 goto out;
1434 if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1435 goto out;
1436 if ((status = encode_restorefh(&xdr)) != 0)
1437 goto out;
1438 status = encode_getfattr(&xdr, args->bitmask);
1439 out:
1440 return status;
1441 }
1442
1443 /*
1444 * Encode CREATE request
1445 */
1446 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1447 {
1448 struct xdr_stream xdr;
1449 struct compound_hdr hdr = {
1450 .nops = 7,
1451 };
1452 int status;
1453
1454 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1455 encode_compound_hdr(&xdr, &hdr);
1456 if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1457 goto out;
1458 if ((status = encode_savefh(&xdr)) != 0)
1459 goto out;
1460 if ((status = encode_create(&xdr, args)) != 0)
1461 goto out;
1462 if ((status = encode_getfh(&xdr)) != 0)
1463 goto out;
1464 if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1465 goto out;
1466 if ((status = encode_restorefh(&xdr)) != 0)
1467 goto out;
1468 status = encode_getfattr(&xdr, args->bitmask);
1469 out:
1470 return status;
1471 }
1472
1473 /*
1474 * Encode SYMLINK request
1475 */
1476 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1477 {
1478 return nfs4_xdr_enc_create(req, p, args);
1479 }
1480
1481 /*
1482 * Encode GETATTR request
1483 */
1484 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1485 {
1486 struct xdr_stream xdr;
1487 struct compound_hdr hdr = {
1488 .nops = 2,
1489 };
1490 int status;
1491
1492 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1493 encode_compound_hdr(&xdr, &hdr);
1494 if ((status = encode_putfh(&xdr, args->fh)) == 0)
1495 status = encode_getfattr(&xdr, args->bitmask);
1496 return status;
1497 }
1498
1499 /*
1500 * Encode a CLOSE request
1501 */
1502 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1503 {
1504 struct xdr_stream xdr;
1505 struct compound_hdr hdr = {
1506 .nops = 3,
1507 };
1508 int status;
1509
1510 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1511 encode_compound_hdr(&xdr, &hdr);
1512 status = encode_putfh(&xdr, args->fh);
1513 if(status)
1514 goto out;
1515 status = encode_close(&xdr, args);
1516 if (status != 0)
1517 goto out;
1518 status = encode_getfattr(&xdr, args->bitmask);
1519 out:
1520 return status;
1521 }
1522
1523 /*
1524 * Encode an OPEN request
1525 */
1526 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1527 {
1528 struct xdr_stream xdr;
1529 struct compound_hdr hdr = {
1530 .nops = 7,
1531 };
1532 int status;
1533
1534 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1535 encode_compound_hdr(&xdr, &hdr);
1536 status = encode_putfh(&xdr, args->fh);
1537 if (status)
1538 goto out;
1539 status = encode_savefh(&xdr);
1540 if (status)
1541 goto out;
1542 status = encode_open(&xdr, args);
1543 if (status)
1544 goto out;
1545 status = encode_getfh(&xdr);
1546 if (status)
1547 goto out;
1548 status = encode_getfattr(&xdr, args->bitmask);
1549 if (status)
1550 goto out;
1551 status = encode_restorefh(&xdr);
1552 if (status)
1553 goto out;
1554 status = encode_getfattr(&xdr, args->bitmask);
1555 out:
1556 return status;
1557 }
1558
1559 /*
1560 * Encode an OPEN_CONFIRM request
1561 */
1562 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1563 {
1564 struct xdr_stream xdr;
1565 struct compound_hdr hdr = {
1566 .nops = 2,
1567 };
1568 int status;
1569
1570 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1571 encode_compound_hdr(&xdr, &hdr);
1572 status = encode_putfh(&xdr, args->fh);
1573 if(status)
1574 goto out;
1575 status = encode_open_confirm(&xdr, args);
1576 out:
1577 return status;
1578 }
1579
1580 /*
1581 * Encode an OPEN request with no attributes.
1582 */
1583 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1584 {
1585 struct xdr_stream xdr;
1586 struct compound_hdr hdr = {
1587 .nops = 3,
1588 };
1589 int status;
1590
1591 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1592 encode_compound_hdr(&xdr, &hdr);
1593 status = encode_putfh(&xdr, args->fh);
1594 if (status)
1595 goto out;
1596 status = encode_open(&xdr, args);
1597 if (status)
1598 goto out;
1599 status = encode_getfattr(&xdr, args->bitmask);
1600 out:
1601 return status;
1602 }
1603
1604 /*
1605 * Encode an OPEN_DOWNGRADE request
1606 */
1607 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1608 {
1609 struct xdr_stream xdr;
1610 struct compound_hdr hdr = {
1611 .nops = 3,
1612 };
1613 int status;
1614
1615 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1616 encode_compound_hdr(&xdr, &hdr);
1617 status = encode_putfh(&xdr, args->fh);
1618 if (status)
1619 goto out;
1620 status = encode_open_downgrade(&xdr, args);
1621 if (status != 0)
1622 goto out;
1623 status = encode_getfattr(&xdr, args->bitmask);
1624 out:
1625 return status;
1626 }
1627
1628 /*
1629 * Encode a LOCK request
1630 */
1631 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1632 {
1633 struct xdr_stream xdr;
1634 struct compound_hdr hdr = {
1635 .nops = 2,
1636 };
1637 int status;
1638
1639 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1640 encode_compound_hdr(&xdr, &hdr);
1641 status = encode_putfh(&xdr, args->fh);
1642 if(status)
1643 goto out;
1644 status = encode_lock(&xdr, args);
1645 out:
1646 return status;
1647 }
1648
1649 /*
1650 * Encode a LOCKT request
1651 */
1652 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1653 {
1654 struct xdr_stream xdr;
1655 struct compound_hdr hdr = {
1656 .nops = 2,
1657 };
1658 int status;
1659
1660 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1661 encode_compound_hdr(&xdr, &hdr);
1662 status = encode_putfh(&xdr, args->fh);
1663 if(status)
1664 goto out;
1665 status = encode_lockt(&xdr, args);
1666 out:
1667 return status;
1668 }
1669
1670 /*
1671 * Encode a LOCKU request
1672 */
1673 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1674 {
1675 struct xdr_stream xdr;
1676 struct compound_hdr hdr = {
1677 .nops = 2,
1678 };
1679 int status;
1680
1681 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1682 encode_compound_hdr(&xdr, &hdr);
1683 status = encode_putfh(&xdr, args->fh);
1684 if(status)
1685 goto out;
1686 status = encode_locku(&xdr, args);
1687 out:
1688 return status;
1689 }
1690
1691 /*
1692 * Encode a READLINK request
1693 */
1694 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1695 {
1696 struct xdr_stream xdr;
1697 struct compound_hdr hdr = {
1698 .nops = 2,
1699 };
1700 int status;
1701
1702 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1703 encode_compound_hdr(&xdr, &hdr);
1704 status = encode_putfh(&xdr, args->fh);
1705 if(status)
1706 goto out;
1707 status = encode_readlink(&xdr, args, req);
1708 out:
1709 return status;
1710 }
1711
1712 /*
1713 * Encode a READDIR request
1714 */
1715 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
1716 {
1717 struct xdr_stream xdr;
1718 struct compound_hdr hdr = {
1719 .nops = 2,
1720 };
1721 int status;
1722
1723 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1724 encode_compound_hdr(&xdr, &hdr);
1725 status = encode_putfh(&xdr, args->fh);
1726 if(status)
1727 goto out;
1728 status = encode_readdir(&xdr, args, req);
1729 out:
1730 return status;
1731 }
1732
1733 /*
1734 * Encode a READ request
1735 */
1736 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
1737 {
1738 struct rpc_auth *auth = req->rq_task->tk_auth;
1739 struct xdr_stream xdr;
1740 struct compound_hdr hdr = {
1741 .nops = 2,
1742 };
1743 int replen, status;
1744
1745 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1746 encode_compound_hdr(&xdr, &hdr);
1747 status = encode_putfh(&xdr, args->fh);
1748 if (status)
1749 goto out;
1750 status = encode_read(&xdr, args);
1751 if (status)
1752 goto out;
1753
1754 /* set up reply kvec
1755 * toplevel status + taglen=0 + rescount + OP_PUTFH + status
1756 * + OP_READ + status + eof + datalen = 9
1757 */
1758 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1759 xdr_inline_pages(&req->rq_rcv_buf, replen,
1760 args->pages, args->pgbase, args->count);
1761 out:
1762 return status;
1763 }
1764
1765 /*
1766 * Encode an SETATTR request
1767 */
1768 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
1769
1770 {
1771 struct xdr_stream xdr;
1772 struct compound_hdr hdr = {
1773 .nops = 3,
1774 };
1775 int status;
1776
1777 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1778 encode_compound_hdr(&xdr, &hdr);
1779 status = encode_putfh(&xdr, args->fh);
1780 if(status)
1781 goto out;
1782 status = encode_setattr(&xdr, args, args->server);
1783 if(status)
1784 goto out;
1785 status = encode_getfattr(&xdr, args->bitmask);
1786 out:
1787 return status;
1788 }
1789
1790 /*
1791 * Encode a GETACL request
1792 */
1793 static int
1794 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
1795 struct nfs_getaclargs *args)
1796 {
1797 struct xdr_stream xdr;
1798 struct rpc_auth *auth = req->rq_task->tk_auth;
1799 struct compound_hdr hdr = {
1800 .nops = 2,
1801 };
1802 int replen, status;
1803
1804 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1805 encode_compound_hdr(&xdr, &hdr);
1806 status = encode_putfh(&xdr, args->fh);
1807 if (status)
1808 goto out;
1809 status = encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0);
1810 /* set up reply buffer: */
1811 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1812 xdr_inline_pages(&req->rq_rcv_buf, replen,
1813 args->acl_pages, args->acl_pgbase, args->acl_len);
1814 out:
1815 return status;
1816 }
1817
1818 /*
1819 * Encode a WRITE request
1820 */
1821 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1822 {
1823 struct xdr_stream xdr;
1824 struct compound_hdr hdr = {
1825 .nops = 3,
1826 };
1827 int status;
1828
1829 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1830 encode_compound_hdr(&xdr, &hdr);
1831 status = encode_putfh(&xdr, args->fh);
1832 if (status)
1833 goto out;
1834 status = encode_write(&xdr, args);
1835 if (status)
1836 goto out;
1837 status = encode_getfattr(&xdr, args->bitmask);
1838 out:
1839 return status;
1840 }
1841
1842 /*
1843 * a COMMIT request
1844 */
1845 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1846 {
1847 struct xdr_stream xdr;
1848 struct compound_hdr hdr = {
1849 .nops = 3,
1850 };
1851 int status;
1852
1853 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1854 encode_compound_hdr(&xdr, &hdr);
1855 status = encode_putfh(&xdr, args->fh);
1856 if (status)
1857 goto out;
1858 status = encode_commit(&xdr, args);
1859 if (status)
1860 goto out;
1861 status = encode_getfattr(&xdr, args->bitmask);
1862 out:
1863 return status;
1864 }
1865
1866 /*
1867 * FSINFO request
1868 */
1869 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
1870 {
1871 struct xdr_stream xdr;
1872 struct compound_hdr hdr = {
1873 .nops = 2,
1874 };
1875 int status;
1876
1877 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1878 encode_compound_hdr(&xdr, &hdr);
1879 status = encode_putfh(&xdr, args->fh);
1880 if (!status)
1881 status = encode_fsinfo(&xdr, args->bitmask);
1882 return status;
1883 }
1884
1885 /*
1886 * a PATHCONF request
1887 */
1888 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
1889 {
1890 struct xdr_stream xdr;
1891 struct compound_hdr hdr = {
1892 .nops = 2,
1893 };
1894 int status;
1895
1896 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1897 encode_compound_hdr(&xdr, &hdr);
1898 status = encode_putfh(&xdr, args->fh);
1899 if (!status)
1900 status = encode_getattr_one(&xdr,
1901 args->bitmask[0] & nfs4_pathconf_bitmap[0]);
1902 return status;
1903 }
1904
1905 /*
1906 * a STATFS request
1907 */
1908 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
1909 {
1910 struct xdr_stream xdr;
1911 struct compound_hdr hdr = {
1912 .nops = 2,
1913 };
1914 int status;
1915
1916 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1917 encode_compound_hdr(&xdr, &hdr);
1918 status = encode_putfh(&xdr, args->fh);
1919 if (status == 0)
1920 status = encode_getattr_two(&xdr,
1921 args->bitmask[0] & nfs4_statfs_bitmap[0],
1922 args->bitmask[1] & nfs4_statfs_bitmap[1]);
1923 return status;
1924 }
1925
1926 /*
1927 * GETATTR_BITMAP request
1928 */
1929 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p, const struct nfs_fh *fhandle)
1930 {
1931 struct xdr_stream xdr;
1932 struct compound_hdr hdr = {
1933 .nops = 2,
1934 };
1935 int status;
1936
1937 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1938 encode_compound_hdr(&xdr, &hdr);
1939 status = encode_putfh(&xdr, fhandle);
1940 if (status == 0)
1941 status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
1942 FATTR4_WORD0_LINK_SUPPORT|
1943 FATTR4_WORD0_SYMLINK_SUPPORT|
1944 FATTR4_WORD0_ACLSUPPORT);
1945 return status;
1946 }
1947
1948 /*
1949 * a RENEW request
1950 */
1951 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
1952 {
1953 struct xdr_stream xdr;
1954 struct compound_hdr hdr = {
1955 .nops = 1,
1956 };
1957
1958 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1959 encode_compound_hdr(&xdr, &hdr);
1960 return encode_renew(&xdr, clp);
1961 }
1962
1963 /*
1964 * a SETCLIENTID request
1965 */
1966 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
1967 {
1968 struct xdr_stream xdr;
1969 struct compound_hdr hdr = {
1970 .nops = 1,
1971 };
1972
1973 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1974 encode_compound_hdr(&xdr, &hdr);
1975 return encode_setclientid(&xdr, sc);
1976 }
1977
1978 /*
1979 * a SETCLIENTID_CONFIRM request
1980 */
1981 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
1982 {
1983 struct xdr_stream xdr;
1984 struct compound_hdr hdr = {
1985 .nops = 3,
1986 };
1987 const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
1988 int status;
1989
1990 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1991 encode_compound_hdr(&xdr, &hdr);
1992 status = encode_setclientid_confirm(&xdr, clp);
1993 if (!status)
1994 status = encode_putrootfh(&xdr);
1995 if (!status)
1996 status = encode_fsinfo(&xdr, lease_bitmap);
1997 return status;
1998 }
1999
2000 /*
2001 * DELEGRETURN request
2002 */
2003 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2004 {
2005 struct xdr_stream xdr;
2006 struct compound_hdr hdr = {
2007 .nops = 3,
2008 };
2009 int status;
2010
2011 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2012 encode_compound_hdr(&xdr, &hdr);
2013 status = encode_putfh(&xdr, args->fhandle);
2014 if (status != 0)
2015 goto out;
2016 status = encode_delegreturn(&xdr, args->stateid);
2017 if (status != 0)
2018 goto out;
2019 status = encode_getfattr(&xdr, args->bitmask);
2020 out:
2021 return status;
2022 }
2023
2024 /*
2025 * Encode FS_LOCATIONS request
2026 */
2027 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2028 {
2029 struct xdr_stream xdr;
2030 struct compound_hdr hdr = {
2031 .nops = 3,
2032 };
2033 struct rpc_auth *auth = req->rq_task->tk_auth;
2034 int replen;
2035 int status;
2036
2037 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2038 encode_compound_hdr(&xdr, &hdr);
2039 if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
2040 goto out;
2041 if ((status = encode_lookup(&xdr, args->name)) != 0)
2042 goto out;
2043 if ((status = encode_fs_locations(&xdr, args->bitmask)) != 0)
2044 goto out;
2045 /* set up reply
2046 * toplevel_status + OP_PUTFH + status
2047 * + OP_LOOKUP + status + OP_GETATTR + status = 7
2048 */
2049 replen = (RPC_REPHDRSIZE + auth->au_rslack + 7) << 2;
2050 xdr_inline_pages(&req->rq_rcv_buf, replen, &args->page,
2051 0, PAGE_SIZE);
2052 out:
2053 return status;
2054 }
2055
2056 /*
2057 * START OF "GENERIC" DECODE ROUTINES.
2058 * These may look a little ugly since they are imported from a "generic"
2059 * set of XDR encode/decode routines which are intended to be shared by
2060 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2061 *
2062 * If the pain of reading these is too great, it should be a straightforward
2063 * task to translate them into Linux-specific versions which are more
2064 * consistent with the style used in NFSv2/v3...
2065 */
2066 #define READ32(x) (x) = ntohl(*p++)
2067 #define READ64(x) do { \
2068 (x) = (u64)ntohl(*p++) << 32; \
2069 (x) |= ntohl(*p++); \
2070 } while (0)
2071 #define READTIME(x) do { \
2072 p++; \
2073 (x.tv_sec) = ntohl(*p++); \
2074 (x.tv_nsec) = ntohl(*p++); \
2075 } while (0)
2076 #define COPYMEM(x,nbytes) do { \
2077 memcpy((x), p, nbytes); \
2078 p += XDR_QUADLEN(nbytes); \
2079 } while (0)
2080
2081 #define READ_BUF(nbytes) do { \
2082 p = xdr_inline_decode(xdr, nbytes); \
2083 if (unlikely(!p)) { \
2084 printk(KERN_INFO "%s: prematurely hit end of receive" \
2085 " buffer\n", __FUNCTION__); \
2086 printk(KERN_INFO "%s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2087 __FUNCTION__, xdr->p, nbytes, xdr->end); \
2088 return -EIO; \
2089 } \
2090 } while (0)
2091
2092 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2093 {
2094 __be32 *p;
2095
2096 READ_BUF(4);
2097 READ32(*len);
2098 READ_BUF(*len);
2099 *string = (char *)p;
2100 return 0;
2101 }
2102
2103 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2104 {
2105 __be32 *p;
2106
2107 READ_BUF(8);
2108 READ32(hdr->status);
2109 READ32(hdr->taglen);
2110
2111 READ_BUF(hdr->taglen + 4);
2112 hdr->tag = (char *)p;
2113 p += XDR_QUADLEN(hdr->taglen);
2114 READ32(hdr->nops);
2115 return 0;
2116 }
2117
2118 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2119 {
2120 __be32 *p;
2121 uint32_t opnum;
2122 int32_t nfserr;
2123
2124 READ_BUF(8);
2125 READ32(opnum);
2126 if (opnum != expected) {
2127 printk(KERN_NOTICE
2128 "nfs4_decode_op_hdr: Server returned operation"
2129 " %d but we issued a request for %d\n",
2130 opnum, expected);
2131 return -EIO;
2132 }
2133 READ32(nfserr);
2134 if (nfserr != NFS_OK)
2135 return -nfs4_stat_to_errno(nfserr);
2136 return 0;
2137 }
2138
2139 /* Dummy routine */
2140 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2141 {
2142 __be32 *p;
2143 unsigned int strlen;
2144 char *str;
2145
2146 READ_BUF(12);
2147 return decode_opaque_inline(xdr, &strlen, &str);
2148 }
2149
2150 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2151 {
2152 uint32_t bmlen;
2153 __be32 *p;
2154
2155 READ_BUF(4);
2156 READ32(bmlen);
2157
2158 bitmap[0] = bitmap[1] = 0;
2159 READ_BUF((bmlen << 2));
2160 if (bmlen > 0) {
2161 READ32(bitmap[0]);
2162 if (bmlen > 1)
2163 READ32(bitmap[1]);
2164 }
2165 return 0;
2166 }
2167
2168 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2169 {
2170 __be32 *p;
2171
2172 READ_BUF(4);
2173 READ32(*attrlen);
2174 *savep = xdr->p;
2175 return 0;
2176 }
2177
2178 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2179 {
2180 if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2181 decode_attr_bitmap(xdr, bitmask);
2182 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2183 } else
2184 bitmask[0] = bitmask[1] = 0;
2185 dprintk("%s: bitmask=0x%x%x\n", __FUNCTION__, bitmask[0], bitmask[1]);
2186 return 0;
2187 }
2188
2189 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2190 {
2191 __be32 *p;
2192
2193 *type = 0;
2194 if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2195 return -EIO;
2196 if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2197 READ_BUF(4);
2198 READ32(*type);
2199 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2200 dprintk("%s: bad type %d\n", __FUNCTION__, *type);
2201 return -EIO;
2202 }
2203 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2204 }
2205 dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
2206 return 0;
2207 }
2208
2209 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2210 {
2211 __be32 *p;
2212
2213 *change = 0;
2214 if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2215 return -EIO;
2216 if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2217 READ_BUF(8);
2218 READ64(*change);
2219 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2220 }
2221 dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
2222 (unsigned long long)*change);
2223 return 0;
2224 }
2225
2226 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2227 {
2228 __be32 *p;
2229
2230 *size = 0;
2231 if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2232 return -EIO;
2233 if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2234 READ_BUF(8);
2235 READ64(*size);
2236 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2237 }
2238 dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
2239 return 0;
2240 }
2241
2242 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2243 {
2244 __be32 *p;
2245
2246 *res = 0;
2247 if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2248 return -EIO;
2249 if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2250 READ_BUF(4);
2251 READ32(*res);
2252 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2253 }
2254 dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2255 return 0;
2256 }
2257
2258 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2259 {
2260 __be32 *p;
2261
2262 *res = 0;
2263 if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2264 return -EIO;
2265 if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2266 READ_BUF(4);
2267 READ32(*res);
2268 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2269 }
2270 dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2271 return 0;
2272 }
2273
2274 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2275 {
2276 __be32 *p;
2277
2278 fsid->major = 0;
2279 fsid->minor = 0;
2280 if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2281 return -EIO;
2282 if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2283 READ_BUF(16);
2284 READ64(fsid->major);
2285 READ64(fsid->minor);
2286 bitmap[0] &= ~FATTR4_WORD0_FSID;
2287 }
2288 dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
2289 (unsigned long long)fsid->major,
2290 (unsigned long long)fsid->minor);
2291 return 0;
2292 }
2293
2294 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2295 {
2296 __be32 *p;
2297
2298 *res = 60;
2299 if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2300 return -EIO;
2301 if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2302 READ_BUF(4);
2303 READ32(*res);
2304 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2305 }
2306 dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
2307 return 0;
2308 }
2309
2310 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2311 {
2312 __be32 *p;
2313
2314 *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2315 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2316 return -EIO;
2317 if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2318 READ_BUF(4);
2319 READ32(*res);
2320 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2321 }
2322 dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
2323 return 0;
2324 }
2325
2326 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2327 {
2328 __be32 *p;
2329
2330 *fileid = 0;
2331 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2332 return -EIO;
2333 if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2334 READ_BUF(8);
2335 READ64(*fileid);
2336 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2337 }
2338 dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2339 return 0;
2340 }
2341
2342 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2343 {
2344 __be32 *p;
2345
2346 *fileid = 0;
2347 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2348 return -EIO;
2349 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2350 READ_BUF(8);
2351 READ64(*fileid);
2352 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2353 }
2354 dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2355 return 0;
2356 }
2357
2358 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2359 {
2360 __be32 *p;
2361 int status = 0;
2362
2363 *res = 0;
2364 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2365 return -EIO;
2366 if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2367 READ_BUF(8);
2368 READ64(*res);
2369 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2370 }
2371 dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2372 return status;
2373 }
2374
2375 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2376 {
2377 __be32 *p;
2378 int status = 0;
2379
2380 *res = 0;
2381 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2382 return -EIO;
2383 if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2384 READ_BUF(8);
2385 READ64(*res);
2386 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2387 }
2388 dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2389 return status;
2390 }
2391
2392 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2393 {
2394 __be32 *p;
2395 int status = 0;
2396
2397 *res = 0;
2398 if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2399 return -EIO;
2400 if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2401 READ_BUF(8);
2402 READ64(*res);
2403 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2404 }
2405 dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2406 return status;
2407 }
2408
2409 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2410 {
2411 int n;
2412 __be32 *p;
2413 int status = 0;
2414
2415 READ_BUF(4);
2416 READ32(n);
2417 if (n < 0)
2418 goto out_eio;
2419 if (n == 0)
2420 goto root_path;
2421 dprintk("path ");
2422 path->ncomponents = 0;
2423 while (path->ncomponents < n) {
2424 struct nfs4_string *component = &path->components[path->ncomponents];
2425 status = decode_opaque_inline(xdr, &component->len, &component->data);
2426 if (unlikely(status != 0))
2427 goto out_eio;
2428 if (path->ncomponents != n)
2429 dprintk("/");
2430 dprintk("%s", component->data);
2431 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2432 path->ncomponents++;
2433 else {
2434 dprintk("cannot parse %d components in path\n", n);
2435 goto out_eio;
2436 }
2437 }
2438 out:
2439 dprintk("\n");
2440 return status;
2441 root_path:
2442 /* a root pathname is sent as a zero component4 */
2443 path->ncomponents = 1;
2444 path->components[0].len=0;
2445 path->components[0].data=NULL;
2446 dprintk("path /\n");
2447 goto out;
2448 out_eio:
2449 dprintk(" status %d", status);
2450 status = -EIO;
2451 goto out;
2452 }
2453
2454 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2455 {
2456 int n;
2457 __be32 *p;
2458 int status = -EIO;
2459
2460 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2461 goto out;
2462 status = 0;
2463 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2464 goto out;
2465 dprintk("%s: fsroot ", __FUNCTION__);
2466 status = decode_pathname(xdr, &res->fs_path);
2467 if (unlikely(status != 0))
2468 goto out;
2469 READ_BUF(4);
2470 READ32(n);
2471 if (n <= 0)
2472 goto out_eio;
2473 res->nlocations = 0;
2474 while (res->nlocations < n) {
2475 int m;
2476 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2477
2478 READ_BUF(4);
2479 READ32(m);
2480 if (m <= 0)
2481 goto out_eio;
2482
2483 loc->nservers = 0;
2484 dprintk("%s: servers ", __FUNCTION__);
2485 while (loc->nservers < m) {
2486 struct nfs4_string *server = &loc->servers[loc->nservers];
2487 status = decode_opaque_inline(xdr, &server->len, &server->data);
2488 if (unlikely(status != 0))
2489 goto out_eio;
2490 dprintk("%s ", server->data);
2491 if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2492 loc->nservers++;
2493 else {
2494 int i;
2495 dprintk("%s: using first %d of %d servers returned for location %d\n", __FUNCTION__, NFS4_FS_LOCATION_MAXSERVERS, m, res->nlocations);
2496 for (i = loc->nservers; i < m; i++) {
2497 unsigned int len;
2498 char *data;
2499 status = decode_opaque_inline(xdr, &len, &data);
2500 if (unlikely(status != 0))
2501 goto out_eio;
2502 }
2503 }
2504 }
2505 status = decode_pathname(xdr, &loc->rootpath);
2506 if (unlikely(status != 0))
2507 goto out_eio;
2508 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2509 res->nlocations++;
2510 }
2511 out:
2512 dprintk("%s: fs_locations done, error = %d\n", __FUNCTION__, status);
2513 return status;
2514 out_eio:
2515 status = -EIO;
2516 goto out;
2517 }
2518
2519 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2520 {
2521 __be32 *p;
2522 int status = 0;
2523
2524 *res = 0;
2525 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2526 return -EIO;
2527 if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2528 READ_BUF(8);
2529 READ64(*res);
2530 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2531 }
2532 dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2533 return status;
2534 }
2535
2536 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2537 {
2538 __be32 *p;
2539 int status = 0;
2540
2541 *maxlink = 1;
2542 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2543 return -EIO;
2544 if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2545 READ_BUF(4);
2546 READ32(*maxlink);
2547 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2548 }
2549 dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
2550 return status;
2551 }
2552
2553 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2554 {
2555 __be32 *p;
2556 int status = 0;
2557
2558 *maxname = 1024;
2559 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2560 return -EIO;
2561 if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2562 READ_BUF(4);
2563 READ32(*maxname);
2564 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2565 }
2566 dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
2567 return status;
2568 }
2569
2570 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2571 {
2572 __be32 *p;
2573 int status = 0;
2574
2575 *res = 1024;
2576 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2577 return -EIO;
2578 if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2579 uint64_t maxread;
2580 READ_BUF(8);
2581 READ64(maxread);
2582 if (maxread > 0x7FFFFFFF)
2583 maxread = 0x7FFFFFFF;
2584 *res = (uint32_t)maxread;
2585 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2586 }
2587 dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
2588 return status;
2589 }
2590
2591 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2592 {
2593 __be32 *p;
2594 int status = 0;
2595
2596 *res = 1024;
2597 if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2598 return -EIO;
2599 if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2600 uint64_t maxwrite;
2601 READ_BUF(8);
2602 READ64(maxwrite);
2603 if (maxwrite > 0x7FFFFFFF)
2604 maxwrite = 0x7FFFFFFF;
2605 *res = (uint32_t)maxwrite;
2606 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2607 }
2608 dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
2609 return status;
2610 }
2611
2612 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2613 {
2614 __be32 *p;
2615
2616 *mode = 0;
2617 if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2618 return -EIO;
2619 if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2620 READ_BUF(4);
2621 READ32(*mode);
2622 *mode &= ~S_IFMT;
2623 bitmap[1] &= ~FATTR4_WORD1_MODE;
2624 }
2625 dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
2626 return 0;
2627 }
2628
2629 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2630 {
2631 __be32 *p;
2632
2633 *nlink = 1;
2634 if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2635 return -EIO;
2636 if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2637 READ_BUF(4);
2638 READ32(*nlink);
2639 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2640 }
2641 dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
2642 return 0;
2643 }
2644
2645 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
2646 {
2647 uint32_t len;
2648 __be32 *p;
2649
2650 *uid = -2;
2651 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2652 return -EIO;
2653 if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2654 READ_BUF(4);
2655 READ32(len);
2656 READ_BUF(len);
2657 if (len < XDR_MAX_NETOBJ) {
2658 if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2659 dprintk("%s: nfs_map_name_to_uid failed!\n",
2660 __FUNCTION__);
2661 } else
2662 printk(KERN_WARNING "%s: name too long (%u)!\n",
2663 __FUNCTION__, len);
2664 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2665 }
2666 dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
2667 return 0;
2668 }
2669
2670 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
2671 {
2672 uint32_t len;
2673 __be32 *p;
2674
2675 *gid = -2;
2676 if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2677 return -EIO;
2678 if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2679 READ_BUF(4);
2680 READ32(len);
2681 READ_BUF(len);
2682 if (len < XDR_MAX_NETOBJ) {
2683 if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2684 dprintk("%s: nfs_map_group_to_gid failed!\n",
2685 __FUNCTION__);
2686 } else
2687 printk(KERN_WARNING "%s: name too long (%u)!\n",
2688 __FUNCTION__, len);
2689 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2690 }
2691 dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
2692 return 0;
2693 }
2694
2695 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2696 {
2697 uint32_t major = 0, minor = 0;
2698 __be32 *p;
2699
2700 *rdev = MKDEV(0,0);
2701 if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2702 return -EIO;
2703 if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2704 dev_t tmp;
2705
2706 READ_BUF(8);
2707 READ32(major);
2708 READ32(minor);
2709 tmp = MKDEV(major, minor);
2710 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2711 *rdev = tmp;
2712 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2713 }
2714 dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
2715 return 0;
2716 }
2717
2718 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2719 {
2720 __be32 *p;
2721 int status = 0;
2722
2723 *res = 0;
2724 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2725 return -EIO;
2726 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2727 READ_BUF(8);
2728 READ64(*res);
2729 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2730 }
2731 dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2732 return status;
2733 }
2734
2735 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2736 {
2737 __be32 *p;
2738 int status = 0;
2739
2740 *res = 0;
2741 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2742 return -EIO;
2743 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2744 READ_BUF(8);
2745 READ64(*res);
2746 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2747 }
2748 dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2749 return status;
2750 }
2751
2752 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2753 {
2754 __be32 *p;
2755 int status = 0;
2756
2757 *res = 0;
2758 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2759 return -EIO;
2760 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2761 READ_BUF(8);
2762 READ64(*res);
2763 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2764 }
2765 dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2766 return status;
2767 }
2768
2769 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2770 {
2771 __be32 *p;
2772
2773 *used = 0;
2774 if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2775 return -EIO;
2776 if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2777 READ_BUF(8);
2778 READ64(*used);
2779 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2780 }
2781 dprintk("%s: space used=%Lu\n", __FUNCTION__,
2782 (unsigned long long)*used);
2783 return 0;
2784 }
2785
2786 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2787 {
2788 __be32 *p;
2789 uint64_t sec;
2790 uint32_t nsec;
2791
2792 READ_BUF(12);
2793 READ64(sec);
2794 READ32(nsec);
2795 time->tv_sec = (time_t)sec;
2796 time->tv_nsec = (long)nsec;
2797 return 0;
2798 }
2799
2800 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2801 {
2802 int status = 0;
2803
2804 time->tv_sec = 0;
2805 time->tv_nsec = 0;
2806 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2807 return -EIO;
2808 if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2809 status = decode_attr_time(xdr, time);
2810 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2811 }
2812 dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2813 return status;
2814 }
2815
2816 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2817 {
2818 int status = 0;
2819
2820 time->tv_sec = 0;
2821 time->tv_nsec = 0;
2822 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2823 return -EIO;
2824 if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2825 status = decode_attr_time(xdr, time);
2826 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2827 }
2828 dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2829 return status;
2830 }
2831
2832 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2833 {
2834 int status = 0;
2835
2836 time->tv_sec = 0;
2837 time->tv_nsec = 0;
2838 if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2839 return -EIO;
2840 if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2841 status = decode_attr_time(xdr, time);
2842 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2843 }
2844 dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2845 return status;
2846 }
2847
2848 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
2849 {
2850 unsigned int attrwords = XDR_QUADLEN(attrlen);
2851 unsigned int nwords = xdr->p - savep;
2852
2853 if (unlikely(attrwords != nwords)) {
2854 printk(KERN_WARNING "%s: server returned incorrect attribute length: %u %c %u\n",
2855 __FUNCTION__,
2856 attrwords << 2,
2857 (attrwords < nwords) ? '<' : '>',
2858 nwords << 2);
2859 return -EIO;
2860 }
2861 return 0;
2862 }
2863
2864 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2865 {
2866 __be32 *p;
2867
2868 READ_BUF(20);
2869 READ32(cinfo->atomic);
2870 READ64(cinfo->before);
2871 READ64(cinfo->after);
2872 return 0;
2873 }
2874
2875 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2876 {
2877 __be32 *p;
2878 uint32_t supp, acc;
2879 int status;
2880
2881 status = decode_op_hdr(xdr, OP_ACCESS);
2882 if (status)
2883 return status;
2884 READ_BUF(8);
2885 READ32(supp);
2886 READ32(acc);
2887 access->supported = supp;
2888 access->access = acc;
2889 return 0;
2890 }
2891
2892 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2893 {
2894 __be32 *p;
2895 int status;
2896
2897 status = decode_op_hdr(xdr, OP_CLOSE);
2898 if (status)
2899 return status;
2900 READ_BUF(NFS4_STATEID_SIZE);
2901 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
2902 return 0;
2903 }
2904
2905 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
2906 {
2907 __be32 *p;
2908 int status;
2909
2910 status = decode_op_hdr(xdr, OP_COMMIT);
2911 if (status)
2912 return status;
2913 READ_BUF(8);
2914 COPYMEM(res->verf->verifier, 8);
2915 return 0;
2916 }
2917
2918 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2919 {
2920 __be32 *p;
2921 uint32_t bmlen;
2922 int status;
2923
2924 status = decode_op_hdr(xdr, OP_CREATE);
2925 if (status)
2926 return status;
2927 if ((status = decode_change_info(xdr, cinfo)))
2928 return status;
2929 READ_BUF(4);
2930 READ32(bmlen);
2931 READ_BUF(bmlen << 2);
2932 return 0;
2933 }
2934
2935 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
2936 {
2937 __be32 *savep;
2938 uint32_t attrlen,
2939 bitmap[2] = {0};
2940 int status;
2941
2942 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2943 goto xdr_error;
2944 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2945 goto xdr_error;
2946 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2947 goto xdr_error;
2948 if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
2949 goto xdr_error;
2950 if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
2951 goto xdr_error;
2952 if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
2953 goto xdr_error;
2954 if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
2955 goto xdr_error;
2956 status = verify_attr_len(xdr, savep, attrlen);
2957 xdr_error:
2958 dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2959 return status;
2960 }
2961
2962 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
2963 {
2964 __be32 *savep;
2965 uint32_t attrlen,
2966 bitmap[2] = {0};
2967 int status;
2968
2969 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2970 goto xdr_error;
2971 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2972 goto xdr_error;
2973 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2974 goto xdr_error;
2975
2976 if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
2977 goto xdr_error;
2978 if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
2979 goto xdr_error;
2980 if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
2981 goto xdr_error;
2982 if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
2983 goto xdr_error;
2984 if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
2985 goto xdr_error;
2986 if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
2987 goto xdr_error;
2988
2989 status = verify_attr_len(xdr, savep, attrlen);
2990 xdr_error:
2991 dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2992 return status;
2993 }
2994
2995 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
2996 {
2997 __be32 *savep;
2998 uint32_t attrlen,
2999 bitmap[2] = {0};
3000 int status;
3001
3002 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3003 goto xdr_error;
3004 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3005 goto xdr_error;
3006 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3007 goto xdr_error;
3008
3009 if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3010 goto xdr_error;
3011 if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3012 goto xdr_error;
3013
3014 status = verify_attr_len(xdr, savep, attrlen);
3015 xdr_error:
3016 dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3017 return status;
3018 }
3019
3020 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3021 {
3022 __be32 *savep;
3023 uint32_t attrlen,
3024 bitmap[2] = {0},
3025 type;
3026 int status, fmode = 0;
3027 uint64_t fileid;
3028
3029 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3030 goto xdr_error;
3031 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3032 goto xdr_error;
3033
3034 fattr->bitmap[0] = bitmap[0];
3035 fattr->bitmap[1] = bitmap[1];
3036
3037 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3038 goto xdr_error;
3039
3040
3041 if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
3042 goto xdr_error;
3043 fattr->type = nfs_type2fmt[type].nfs2type;
3044 fmode = nfs_type2fmt[type].mode;
3045
3046 if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
3047 goto xdr_error;
3048 if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
3049 goto xdr_error;
3050 if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid)) != 0)
3051 goto xdr_error;
3052 if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
3053 goto xdr_error;
3054 if ((status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3055 struct nfs4_fs_locations,
3056 fattr))) != 0)
3057 goto xdr_error;
3058 if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
3059 goto xdr_error;
3060 fattr->mode |= fmode;
3061 if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
3062 goto xdr_error;
3063 if ((status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid)) != 0)
3064 goto xdr_error;
3065 if ((status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid)) != 0)
3066 goto xdr_error;
3067 if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
3068 goto xdr_error;
3069 if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
3070 goto xdr_error;
3071 if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
3072 goto xdr_error;
3073 if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
3074 goto xdr_error;
3075 if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
3076 goto xdr_error;
3077 if ((status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid)) != 0)
3078 goto xdr_error;
3079 if (fattr->fileid == 0 && fileid != 0)
3080 fattr->fileid = fileid;
3081 if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
3082 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
3083 xdr_error:
3084 dprintk("%s: xdr returned %d\n", __FUNCTION__, -status);
3085 return status;
3086 }
3087
3088
3089 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3090 {
3091 __be32 *savep;
3092 uint32_t attrlen, bitmap[2];
3093 int status;
3094
3095 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3096 goto xdr_error;
3097 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3098 goto xdr_error;
3099 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3100 goto xdr_error;
3101
3102 fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
3103
3104 if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3105 goto xdr_error;
3106 if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3107 goto xdr_error;
3108 if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3109 goto xdr_error;
3110 fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3111 if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3112 goto xdr_error;
3113 fsinfo->wtpref = fsinfo->wtmax;
3114
3115 status = verify_attr_len(xdr, savep, attrlen);
3116 xdr_error:
3117 dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3118 return status;
3119 }
3120
3121 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3122 {
3123 __be32 *p;
3124 uint32_t len;
3125 int status;
3126
3127 status = decode_op_hdr(xdr, OP_GETFH);
3128 if (status)
3129 return status;
3130 /* Zero handle first to allow comparisons */
3131 memset(fh, 0, sizeof(*fh));
3132
3133 READ_BUF(4);
3134 READ32(len);
3135 if (len > NFS4_FHSIZE)
3136 return -EIO;
3137 fh->size = len;
3138 READ_BUF(len);
3139 COPYMEM(fh->data, len);
3140 return 0;
3141 }
3142
3143 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3144 {
3145 int status;
3146
3147 status = decode_op_hdr(xdr, OP_LINK);
3148 if (status)
3149 return status;
3150 return decode_change_info(xdr, cinfo);
3151 }
3152
3153 /*
3154 * We create the owner, so we know a proper owner.id length is 4.
3155 */
3156 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3157 {
3158 uint64_t offset, length, clientid;
3159 __be32 *p;
3160 uint32_t namelen, type;
3161
3162 READ_BUF(32);
3163 READ64(offset);
3164 READ64(length);
3165 READ32(type);
3166 if (fl != NULL) {
3167 fl->fl_start = (loff_t)offset;
3168 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3169 if (length == ~(uint64_t)0)
3170 fl->fl_end = OFFSET_MAX;
3171 fl->fl_type = F_WRLCK;
3172 if (type & 1)
3173 fl->fl_type = F_RDLCK;
3174 fl->fl_pid = 0;
3175 }
3176 READ64(clientid);
3177 READ32(namelen);
3178 READ_BUF(namelen);
3179 return -NFS4ERR_DENIED;
3180 }
3181
3182 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3183 {
3184 __be32 *p;
3185 int status;
3186
3187 status = decode_op_hdr(xdr, OP_LOCK);
3188 if (status == 0) {
3189 READ_BUF(NFS4_STATEID_SIZE);
3190 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3191 } else if (status == -NFS4ERR_DENIED)
3192 return decode_lock_denied(xdr, NULL);
3193 return status;
3194 }
3195
3196 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3197 {
3198 int status;
3199 status = decode_op_hdr(xdr, OP_LOCKT);
3200 if (status == -NFS4ERR_DENIED)
3201 return decode_lock_denied(xdr, res->denied);
3202 return status;
3203 }
3204
3205 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3206 {
3207 __be32 *p;
3208 int status;
3209
3210 status = decode_op_hdr(xdr, OP_LOCKU);
3211 if (status == 0) {
3212 READ_BUF(NFS4_STATEID_SIZE);
3213 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3214 }
3215 return status;
3216 }
3217
3218 static int decode_lookup(struct xdr_stream *xdr)
3219 {
3220 return decode_op_hdr(xdr, OP_LOOKUP);
3221 }
3222
3223 /* This is too sick! */
3224 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3225 {
3226 __be32 *p;
3227 uint32_t limit_type, nblocks, blocksize;
3228
3229 READ_BUF(12);
3230 READ32(limit_type);
3231 switch (limit_type) {
3232 case 1:
3233 READ64(*maxsize);
3234 break;
3235 case 2:
3236 READ32(nblocks);
3237 READ32(blocksize);
3238 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3239 }
3240 return 0;
3241 }
3242
3243 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3244 {
3245 __be32 *p;
3246 uint32_t delegation_type;
3247
3248 READ_BUF(4);
3249 READ32(delegation_type);
3250 if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3251 res->delegation_type = 0;
3252 return 0;
3253 }
3254 READ_BUF(NFS4_STATEID_SIZE+4);
3255 COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3256 READ32(res->do_recall);
3257 switch (delegation_type) {
3258 case NFS4_OPEN_DELEGATE_READ:
3259 res->delegation_type = FMODE_READ;
3260 break;
3261 case NFS4_OPEN_DELEGATE_WRITE:
3262 res->delegation_type = FMODE_WRITE|FMODE_READ;
3263 if (decode_space_limit(xdr, &res->maxsize) < 0)
3264 return -EIO;
3265 }
3266 return decode_ace(xdr, NULL, res->server->nfs_client);
3267 }
3268
3269 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3270 {
3271 __be32 *p;
3272 uint32_t bmlen;
3273 int status;
3274
3275 status = decode_op_hdr(xdr, OP_OPEN);
3276 if (status)
3277 return status;
3278 READ_BUF(NFS4_STATEID_SIZE);
3279 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3280
3281 decode_change_info(xdr, &res->cinfo);
3282
3283 READ_BUF(8);
3284 READ32(res->rflags);
3285 READ32(bmlen);
3286 if (bmlen > 10)
3287 goto xdr_error;
3288
3289 READ_BUF(bmlen << 2);
3290 p += bmlen;
3291 return decode_delegation(xdr, res);
3292 xdr_error:
3293 dprintk("%s: Bitmap too large! Length = %u\n", __FUNCTION__, bmlen);
3294 return -EIO;
3295 }
3296
3297 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3298 {
3299 __be32 *p;
3300 int status;
3301
3302 status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3303 if (status)
3304 return status;
3305 READ_BUF(NFS4_STATEID_SIZE);
3306 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3307 return 0;
3308 }
3309
3310 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3311 {
3312 __be32 *p;
3313 int status;
3314
3315 status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3316 if (status)
3317 return status;
3318 READ_BUF(NFS4_STATEID_SIZE);
3319 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3320 return 0;
3321 }
3322
3323 static int decode_putfh(struct xdr_stream *xdr)
3324 {
3325 return decode_op_hdr(xdr, OP_PUTFH);
3326 }
3327
3328 static int decode_putrootfh(struct xdr_stream *xdr)
3329 {
3330 return decode_op_hdr(xdr, OP_PUTROOTFH);
3331 }
3332
3333 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3334 {
3335 struct kvec *iov = req->rq_rcv_buf.head;
3336 __be32 *p;
3337 uint32_t count, eof, recvd, hdrlen;
3338 int status;
3339
3340 status = decode_op_hdr(xdr, OP_READ);
3341 if (status)
3342 return status;
3343 READ_BUF(8);
3344 READ32(eof);
3345 READ32(count);
3346 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3347 recvd = req->rq_rcv_buf.len - hdrlen;
3348 if (count > recvd) {
3349 printk(KERN_WARNING "NFS: server cheating in read reply: "
3350 "count %u > recvd %u\n", count, recvd);
3351 count = recvd;
3352 eof = 0;
3353 }
3354 xdr_read_pages(xdr, count);
3355 res->eof = eof;
3356 res->count = count;
3357 return 0;
3358 }
3359
3360 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3361 {
3362 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3363 struct page *page = *rcvbuf->pages;
3364 struct kvec *iov = rcvbuf->head;
3365 unsigned int nr, pglen = rcvbuf->page_len;
3366 __be32 *end, *entry, *p, *kaddr;
3367 uint32_t len, attrlen, xlen;
3368 int hdrlen, recvd, status;
3369
3370 status = decode_op_hdr(xdr, OP_READDIR);
3371 if (status)
3372 return status;
3373 READ_BUF(8);
3374 COPYMEM(readdir->verifier.data, 8);
3375 dprintk("%s: verifier = 0x%x%x\n",
3376 __FUNCTION__,
3377 ((u32 *)readdir->verifier.data)[0],
3378 ((u32 *)readdir->verifier.data)[1]);
3379
3380
3381 hdrlen = (char *) p - (char *) iov->iov_base;
3382 recvd = rcvbuf->len - hdrlen;
3383 if (pglen > recvd)
3384 pglen = recvd;
3385 xdr_read_pages(xdr, pglen);
3386
3387 BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3388 kaddr = p = kmap_atomic(page, KM_USER0);
3389 end = p + ((pglen + readdir->pgbase) >> 2);
3390 entry = p;
3391 for (nr = 0; *p++; nr++) {
3392 if (end - p < 3)
3393 goto short_pkt;
3394 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3395 p += 2; /* cookie */
3396 len = ntohl(*p++); /* filename length */
3397 if (len > NFS4_MAXNAMLEN) {
3398 printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)\n", len);
3399 goto err_unmap;
3400 }
3401 xlen = XDR_QUADLEN(len);
3402 if (end - p < xlen + 1)
3403 goto short_pkt;
3404 dprintk("filename = %*s\n", len, (char *)p);
3405 p += xlen;
3406 len = ntohl(*p++); /* bitmap length */
3407 if (end - p < len + 1)
3408 goto short_pkt;
3409 p += len;
3410 attrlen = XDR_QUADLEN(ntohl(*p++));
3411 if (end - p < attrlen + 2)
3412 goto short_pkt;
3413 p += attrlen; /* attributes */
3414 entry = p;
3415 }
3416 if (!nr && (entry[0] != 0 || entry[1] == 0))
3417 goto short_pkt;
3418 out:
3419 kunmap_atomic(kaddr, KM_USER0);
3420 return 0;
3421 short_pkt:
3422 dprintk("%s: short packet at entry %d\n", __FUNCTION__, nr);
3423 entry[0] = entry[1] = 0;
3424 /* truncate listing ? */
3425 if (!nr) {
3426 printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
3427 entry[1] = 1;
3428 }
3429 goto out;
3430 err_unmap:
3431 kunmap_atomic(kaddr, KM_USER0);
3432 return -errno_NFSERR_IO;
3433 }
3434
3435 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3436 {
3437 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3438 struct kvec *iov = rcvbuf->head;
3439 int hdrlen, len, recvd;
3440 __be32 *p;
3441 char *kaddr;
3442 int status;
3443
3444 status = decode_op_hdr(xdr, OP_READLINK);
3445 if (status)
3446 return status;
3447
3448 /* Convert length of symlink */
3449 READ_BUF(4);
3450 READ32(len);
3451 if (len >= rcvbuf->page_len || len <= 0) {
3452 dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
3453 return -ENAMETOOLONG;
3454 }
3455 hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3456 recvd = req->rq_rcv_buf.len - hdrlen;
3457 if (recvd < len) {
3458 printk(KERN_WARNING "NFS: server cheating in readlink reply: "
3459 "count %u > recvd %u\n", len, recvd);
3460 return -EIO;
3461 }
3462 xdr_read_pages(xdr, len);
3463 /*
3464 * The XDR encode routine has set things up so that
3465 * the link text will be copied directly into the
3466 * buffer. We just have to do overflow-checking,
3467 * and and null-terminate the text (the VFS expects
3468 * null-termination).
3469 */
3470 kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3471 kaddr[len+rcvbuf->page_base] = '\0';
3472 kunmap_atomic(kaddr, KM_USER0);
3473 return 0;
3474 }
3475
3476 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3477 {
3478 int status;
3479
3480 status = decode_op_hdr(xdr, OP_REMOVE);
3481 if (status)
3482 goto out;
3483 status = decode_change_info(xdr, cinfo);
3484 out:
3485 return status;
3486 }
3487
3488 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3489 struct nfs4_change_info *new_cinfo)
3490 {
3491 int status;
3492
3493 status = decode_op_hdr(xdr, OP_RENAME);
3494 if (status)
3495 goto out;
3496 if ((status = decode_change_info(xdr, old_cinfo)))
3497 goto out;
3498 status = decode_change_info(xdr, new_cinfo);
3499 out:
3500 return status;
3501 }
3502
3503 static int decode_renew(struct xdr_stream *xdr)
3504 {
3505 return decode_op_hdr(xdr, OP_RENEW);
3506 }
3507
3508 static int
3509 decode_restorefh(struct xdr_stream *xdr)
3510 {
3511 return decode_op_hdr(xdr, OP_RESTOREFH);
3512 }
3513
3514 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3515 size_t *acl_len)
3516 {
3517 __be32 *savep;
3518 uint32_t attrlen,
3519 bitmap[2] = {0};
3520 struct kvec *iov = req->rq_rcv_buf.head;
3521 int status;
3522
3523 *acl_len = 0;
3524 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3525 goto out;
3526 if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3527 goto out;
3528 if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3529 goto out;
3530
3531 if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3532 return -EIO;
3533 if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3534 int hdrlen, recvd;
3535
3536 /* We ignore &savep and don't do consistency checks on
3537 * the attr length. Let userspace figure it out.... */
3538 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3539 recvd = req->rq_rcv_buf.len - hdrlen;
3540 if (attrlen > recvd) {
3541 printk(KERN_WARNING "NFS: server cheating in getattr"
3542 " acl reply: attrlen %u > recvd %u\n",
3543 attrlen, recvd);
3544 return -EINVAL;
3545 }
3546 xdr_read_pages(xdr, attrlen);
3547 *acl_len = attrlen;
3548 } else
3549 status = -EOPNOTSUPP;
3550
3551 out:
3552 return status;
3553 }
3554
3555 static int
3556 decode_savefh(struct xdr_stream *xdr)
3557 {
3558 return decode_op_hdr(xdr, OP_SAVEFH);
3559 }
3560
3561 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3562 {
3563 __be32 *p;
3564 uint32_t bmlen;
3565 int status;
3566
3567
3568 status = decode_op_hdr(xdr, OP_SETATTR);
3569 if (status)
3570 return status;
3571 READ_BUF(4);
3572 READ32(bmlen);
3573 READ_BUF(bmlen << 2);
3574 return 0;
3575 }
3576
3577 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
3578 {
3579 __be32 *p;
3580 uint32_t opnum;
3581 int32_t nfserr;
3582
3583 READ_BUF(8);
3584 READ32(opnum);
3585 if (opnum != OP_SETCLIENTID) {
3586 printk(KERN_NOTICE
3587 "nfs4_decode_setclientid: Server returned operation"
3588 " %d\n", opnum);
3589 return -EIO;
3590 }
3591 READ32(nfserr);
3592 if (nfserr == NFS_OK) {
3593 READ_BUF(8 + NFS4_VERIFIER_SIZE);
3594 READ64(clp->cl_clientid);
3595 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
3596 } else if (nfserr == NFSERR_CLID_INUSE) {
3597 uint32_t len;
3598
3599 /* skip netid string */
3600 READ_BUF(4);
3601 READ32(len);
3602 READ_BUF(len);
3603
3604 /* skip uaddr string */
3605 READ_BUF(4);
3606 READ32(len);
3607 READ_BUF(len);
3608 return -NFSERR_CLID_INUSE;
3609 } else
3610 return -nfs4_stat_to_errno(nfserr);
3611
3612 return 0;
3613 }
3614
3615 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3616 {
3617 return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3618 }
3619
3620 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3621 {
3622 __be32 *p;
3623 int status;
3624
3625 status = decode_op_hdr(xdr, OP_WRITE);
3626 if (status)
3627 return status;
3628
3629 READ_BUF(16);
3630 READ32(res->count);
3631 READ32(res->verf->committed);
3632 COPYMEM(res->verf->verifier, 8);
3633 return 0;
3634 }
3635
3636 static int decode_delegreturn(struct xdr_stream *xdr)
3637 {
3638 return decode_op_hdr(xdr, OP_DELEGRETURN);
3639 }
3640
3641 /*
3642 * Decode OPEN_DOWNGRADE response
3643 */
3644 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
3645 {
3646 struct xdr_stream xdr;
3647 struct compound_hdr hdr;
3648 int status;
3649
3650 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3651 status = decode_compound_hdr(&xdr, &hdr);
3652 if (status)
3653 goto out;
3654 status = decode_putfh(&xdr);
3655 if (status)
3656 goto out;
3657 status = decode_open_downgrade(&xdr, res);
3658 if (status != 0)
3659 goto out;
3660 decode_getfattr(&xdr, res->fattr, res->server);
3661 out:
3662 return status;
3663 }
3664
3665 /*
3666 * END OF "GENERIC" DECODE ROUTINES.
3667 */
3668
3669 /*
3670 * Decode ACCESS response
3671 */
3672 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
3673 {
3674 struct xdr_stream xdr;
3675 struct compound_hdr hdr;
3676 int status;
3677
3678 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3679 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3680 goto out;
3681 if ((status = decode_putfh(&xdr)) == 0)
3682 status = decode_access(&xdr, res);
3683 out:
3684 return status;
3685 }
3686
3687 /*
3688 * Decode LOOKUP response
3689 */
3690 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3691 {
3692 struct xdr_stream xdr;
3693 struct compound_hdr hdr;
3694 int status;
3695
3696 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3697 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3698 goto out;
3699 if ((status = decode_putfh(&xdr)) != 0)
3700 goto out;
3701 if ((status = decode_lookup(&xdr)) != 0)
3702 goto out;
3703 if ((status = decode_getfh(&xdr, res->fh)) != 0)
3704 goto out;
3705 status = decode_getfattr(&xdr, res->fattr, res->server);
3706 out:
3707 return status;
3708 }
3709
3710 /*
3711 * Decode LOOKUP_ROOT response
3712 */
3713 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3714 {
3715 struct xdr_stream xdr;
3716 struct compound_hdr hdr;
3717 int status;
3718
3719 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3720 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3721 goto out;
3722 if ((status = decode_putrootfh(&xdr)) != 0)
3723 goto out;
3724 if ((status = decode_getfh(&xdr, res->fh)) == 0)
3725 status = decode_getfattr(&xdr, res->fattr, res->server);
3726 out:
3727 return status;
3728 }
3729
3730 /*
3731 * Decode REMOVE response
3732 */
3733 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_remove_res *res)
3734 {
3735 struct xdr_stream xdr;
3736 struct compound_hdr hdr;
3737 int status;
3738
3739 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3740 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3741 goto out;
3742 if ((status = decode_putfh(&xdr)) != 0)
3743 goto out;
3744 if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3745 goto out;
3746 decode_getfattr(&xdr, res->dir_attr, res->server);
3747 out:
3748 return status;
3749 }
3750
3751 /*
3752 * Decode RENAME response
3753 */
3754 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
3755 {
3756 struct xdr_stream xdr;
3757 struct compound_hdr hdr;
3758 int status;
3759
3760 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3761 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3762 goto out;
3763 if ((status = decode_putfh(&xdr)) != 0)
3764 goto out;
3765 if ((status = decode_savefh(&xdr)) != 0)
3766 goto out;
3767 if ((status = decode_putfh(&xdr)) != 0)
3768 goto out;
3769 if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3770 goto out;
3771 /* Current FH is target directory */
3772 if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3773 goto out;
3774 if ((status = decode_restorefh(&xdr)) != 0)
3775 goto out;
3776 decode_getfattr(&xdr, res->old_fattr, res->server);
3777 out:
3778 return status;
3779 }
3780
3781 /*
3782 * Decode LINK response
3783 */
3784 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
3785 {
3786 struct xdr_stream xdr;
3787 struct compound_hdr hdr;
3788 int status;
3789
3790 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3791 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3792 goto out;
3793 if ((status = decode_putfh(&xdr)) != 0)
3794 goto out;
3795 if ((status = decode_savefh(&xdr)) != 0)
3796 goto out;
3797 if ((status = decode_putfh(&xdr)) != 0)
3798 goto out;
3799 if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3800 goto out;
3801 /*
3802 * Note order: OP_LINK leaves the directory as the current
3803 * filehandle.
3804 */
3805 if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3806 goto out;
3807 if ((status = decode_restorefh(&xdr)) != 0)
3808 goto out;
3809 decode_getfattr(&xdr, res->fattr, res->server);
3810 out:
3811 return status;
3812 }
3813
3814 /*
3815 * Decode CREATE response
3816 */
3817 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3818 {
3819 struct xdr_stream xdr;
3820 struct compound_hdr hdr;
3821 int status;
3822
3823 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3824 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3825 goto out;
3826 if ((status = decode_putfh(&xdr)) != 0)
3827 goto out;
3828 if ((status = decode_savefh(&xdr)) != 0)
3829 goto out;
3830 if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3831 goto out;
3832 if ((status = decode_getfh(&xdr, res->fh)) != 0)
3833 goto out;
3834 if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3835 goto out;
3836 if ((status = decode_restorefh(&xdr)) != 0)
3837 goto out;
3838 decode_getfattr(&xdr, res->dir_fattr, res->server);
3839 out:
3840 return status;
3841 }
3842
3843 /*
3844 * Decode SYMLINK response
3845 */
3846 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3847 {
3848 return nfs4_xdr_dec_create(rqstp, p, res);
3849 }
3850
3851 /*
3852 * Decode GETATTR response
3853 */
3854 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
3855 {
3856 struct xdr_stream xdr;
3857 struct compound_hdr hdr;
3858 int status;
3859
3860 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3861 status = decode_compound_hdr(&xdr, &hdr);
3862 if (status)
3863 goto out;
3864 status = decode_putfh(&xdr);
3865 if (status)
3866 goto out;
3867 status = decode_getfattr(&xdr, res->fattr, res->server);
3868 out:
3869 return status;
3870
3871 }
3872
3873 /*
3874 * Encode an SETACL request
3875 */
3876 static int
3877 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
3878 {
3879 struct xdr_stream xdr;
3880 struct compound_hdr hdr = {
3881 .nops = 2,
3882 };
3883 int status;
3884
3885 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
3886 encode_compound_hdr(&xdr, &hdr);
3887 status = encode_putfh(&xdr, args->fh);
3888 if (status)
3889 goto out;
3890 status = encode_setacl(&xdr, args);
3891 out:
3892 return status;
3893 }
3894 /*
3895 * Decode SETACL response
3896 */
3897 static int
3898 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p, void *res)
3899 {
3900 struct xdr_stream xdr;
3901 struct compound_hdr hdr;
3902 int status;
3903
3904 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3905 status = decode_compound_hdr(&xdr, &hdr);
3906 if (status)
3907 goto out;
3908 status = decode_putfh(&xdr);
3909 if (status)
3910 goto out;
3911 status = decode_setattr(&xdr, res);
3912 out:
3913 return status;
3914 }
3915
3916 /*
3917 * Decode GETACL response
3918 */
3919 static int
3920 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p, size_t *acl_len)
3921 {
3922 struct xdr_stream xdr;
3923 struct compound_hdr hdr;
3924 int status;
3925
3926 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3927 status = decode_compound_hdr(&xdr, &hdr);
3928 if (status)
3929 goto out;
3930 status = decode_putfh(&xdr);
3931 if (status)
3932 goto out;
3933 status = decode_getacl(&xdr, rqstp, acl_len);
3934
3935 out:
3936 return status;
3937 }
3938
3939 /*
3940 * Decode CLOSE response
3941 */
3942 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
3943 {
3944 struct xdr_stream xdr;
3945 struct compound_hdr hdr;
3946 int status;
3947
3948 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3949 status = decode_compound_hdr(&xdr, &hdr);
3950 if (status)
3951 goto out;
3952 status = decode_putfh(&xdr);
3953 if (status)
3954 goto out;
3955 status = decode_close(&xdr, res);
3956 if (status != 0)
3957 goto out;
3958 /*
3959 * Note: Server may do delete on close for this file
3960 * in which case the getattr call will fail with
3961 * an ESTALE error. Shouldn't be a problem,
3962 * though, since fattr->valid will remain unset.
3963 */
3964 decode_getfattr(&xdr, res->fattr, res->server);
3965 out:
3966 return status;
3967 }
3968
3969 /*
3970 * Decode OPEN response
3971 */
3972 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
3973 {
3974 struct xdr_stream xdr;
3975 struct compound_hdr hdr;
3976 int status;
3977
3978 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3979 status = decode_compound_hdr(&xdr, &hdr);
3980 if (status)
3981 goto out;
3982 status = decode_putfh(&xdr);
3983 if (status)
3984 goto out;
3985 status = decode_savefh(&xdr);
3986 if (status)
3987 goto out;
3988 status = decode_open(&xdr, res);
3989 if (status)
3990 goto out;
3991 status = decode_getfh(&xdr, &res->fh);
3992 if (status)
3993 goto out;
3994 if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
3995 goto out;
3996 if ((status = decode_restorefh(&xdr)) != 0)
3997 goto out;
3998 decode_getfattr(&xdr, res->dir_attr, res->server);
3999 out:
4000 return status;
4001 }
4002
4003 /*
4004 * Decode OPEN_CONFIRM response
4005 */
4006 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4007 {
4008 struct xdr_stream xdr;
4009 struct compound_hdr hdr;
4010 int status;
4011
4012 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4013 status = decode_compound_hdr(&xdr, &hdr);
4014 if (status)
4015 goto out;
4016 status = decode_putfh(&xdr);
4017 if (status)
4018 goto out;
4019 status = decode_open_confirm(&xdr, res);
4020 out:
4021 return status;
4022 }
4023
4024 /*
4025 * Decode OPEN response
4026 */
4027 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4028 {
4029 struct xdr_stream xdr;
4030 struct compound_hdr hdr;
4031 int status;
4032
4033 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4034 status = decode_compound_hdr(&xdr, &hdr);
4035 if (status)
4036 goto out;
4037 status = decode_putfh(&xdr);
4038 if (status)
4039 goto out;
4040 status = decode_open(&xdr, res);
4041 if (status)
4042 goto out;
4043 decode_getfattr(&xdr, res->f_attr, res->server);
4044 out:
4045 return status;
4046 }
4047
4048 /*
4049 * Decode SETATTR response
4050 */
4051 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4052 {
4053 struct xdr_stream xdr;
4054 struct compound_hdr hdr;
4055 int status;
4056
4057 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4058 status = decode_compound_hdr(&xdr, &hdr);
4059 if (status)
4060 goto out;
4061 status = decode_putfh(&xdr);
4062 if (status)
4063 goto out;
4064 status = decode_setattr(&xdr, res);
4065 if (status)
4066 goto out;
4067 status = decode_getfattr(&xdr, res->fattr, res->server);
4068 if (status == NFS4ERR_DELAY)
4069 status = 0;
4070 out:
4071 return status;
4072 }
4073
4074 /*
4075 * Decode LOCK response
4076 */
4077 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4078 {
4079 struct xdr_stream xdr;
4080 struct compound_hdr hdr;
4081 int status;
4082
4083 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4084 status = decode_compound_hdr(&xdr, &hdr);
4085 if (status)
4086 goto out;
4087 status = decode_putfh(&xdr);
4088 if (status)
4089 goto out;
4090 status = decode_lock(&xdr, res);
4091 out:
4092 return status;
4093 }
4094
4095 /*
4096 * Decode LOCKT response
4097 */
4098 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4099 {
4100 struct xdr_stream xdr;
4101 struct compound_hdr hdr;
4102 int status;
4103
4104 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4105 status = decode_compound_hdr(&xdr, &hdr);
4106 if (status)
4107 goto out;
4108 status = decode_putfh(&xdr);
4109 if (status)
4110 goto out;
4111 status = decode_lockt(&xdr, res);
4112 out:
4113 return status;
4114 }
4115
4116 /*
4117 * Decode LOCKU response
4118 */
4119 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4120 {
4121 struct xdr_stream xdr;
4122 struct compound_hdr hdr;
4123 int status;
4124
4125 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4126 status = decode_compound_hdr(&xdr, &hdr);
4127 if (status)
4128 goto out;
4129 status = decode_putfh(&xdr);
4130 if (status)
4131 goto out;
4132 status = decode_locku(&xdr, res);
4133 out:
4134 return status;
4135 }
4136
4137 /*
4138 * Decode READLINK response
4139 */
4140 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p, void *res)
4141 {
4142 struct xdr_stream xdr;
4143 struct compound_hdr hdr;
4144 int status;
4145
4146 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4147 status = decode_compound_hdr(&xdr, &hdr);
4148 if (status)
4149 goto out;
4150 status = decode_putfh(&xdr);
4151 if (status)
4152 goto out;
4153 status = decode_readlink(&xdr, rqstp);
4154 out:
4155 return status;
4156 }
4157
4158 /*
4159 * Decode READDIR response
4160 */
4161 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4162 {
4163 struct xdr_stream xdr;
4164 struct compound_hdr hdr;
4165 int status;
4166
4167 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4168 status = decode_compound_hdr(&xdr, &hdr);
4169 if (status)
4170 goto out;
4171 status = decode_putfh(&xdr);
4172 if (status)
4173 goto out;
4174 status = decode_readdir(&xdr, rqstp, res);
4175 out:
4176 return status;
4177 }
4178
4179 /*
4180 * Decode Read response
4181 */
4182 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4183 {
4184 struct xdr_stream xdr;
4185 struct compound_hdr hdr;
4186 int status;
4187
4188 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4189 status = decode_compound_hdr(&xdr, &hdr);
4190 if (status)
4191 goto out;
4192 status = decode_putfh(&xdr);
4193 if (status)
4194 goto out;
4195 status = decode_read(&xdr, rqstp, res);
4196 if (!status)
4197 status = res->count;
4198 out:
4199 return status;
4200 }
4201
4202 /*
4203 * Decode WRITE response
4204 */
4205 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4206 {
4207 struct xdr_stream xdr;
4208 struct compound_hdr hdr;
4209 int status;
4210
4211 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4212 status = decode_compound_hdr(&xdr, &hdr);
4213 if (status)
4214 goto out;
4215 status = decode_putfh(&xdr);
4216 if (status)
4217 goto out;
4218 status = decode_write(&xdr, res);
4219 if (status)
4220 goto out;
4221 decode_getfattr(&xdr, res->fattr, res->server);
4222 if (!status)
4223 status = res->count;
4224 out:
4225 return status;
4226 }
4227
4228 /*
4229 * Decode COMMIT response
4230 */
4231 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4232 {
4233 struct xdr_stream xdr;
4234 struct compound_hdr hdr;
4235 int status;
4236
4237 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4238 status = decode_compound_hdr(&xdr, &hdr);
4239 if (status)
4240 goto out;
4241 status = decode_putfh(&xdr);
4242 if (status)
4243 goto out;
4244 status = decode_commit(&xdr, res);
4245 if (status)
4246 goto out;
4247 decode_getfattr(&xdr, res->fattr, res->server);
4248 out:
4249 return status;
4250 }
4251
4252 /*
4253 * FSINFO request
4254 */
4255 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4256 {
4257 struct xdr_stream xdr;
4258 struct compound_hdr hdr;
4259 int status;
4260
4261 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4262 status = decode_compound_hdr(&xdr, &hdr);
4263 if (!status)
4264 status = decode_putfh(&xdr);
4265 if (!status)
4266 status = decode_fsinfo(&xdr, fsinfo);
4267 if (!status)
4268 status = -nfs4_stat_to_errno(hdr.status);
4269 return status;
4270 }
4271
4272 /*
4273 * PATHCONF request
4274 */
4275 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *pathconf)
4276 {
4277 struct xdr_stream xdr;
4278 struct compound_hdr hdr;
4279 int status;
4280
4281 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4282 status = decode_compound_hdr(&xdr, &hdr);
4283 if (!status)
4284 status = decode_putfh(&xdr);
4285 if (!status)
4286 status = decode_pathconf(&xdr, pathconf);
4287 return status;
4288 }
4289
4290 /*
4291 * STATFS request
4292 */
4293 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *fsstat)
4294 {
4295 struct xdr_stream xdr;
4296 struct compound_hdr hdr;
4297 int status;
4298
4299 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4300 status = decode_compound_hdr(&xdr, &hdr);
4301 if (!status)
4302 status = decode_putfh(&xdr);
4303 if (!status)
4304 status = decode_statfs(&xdr, fsstat);
4305 return status;
4306 }
4307
4308 /*
4309 * GETATTR_BITMAP request
4310 */
4311 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
4312 {
4313 struct xdr_stream xdr;
4314 struct compound_hdr hdr;
4315 int status;
4316
4317 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4318 if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4319 goto out;
4320 if ((status = decode_putfh(&xdr)) != 0)
4321 goto out;
4322 status = decode_server_caps(&xdr, res);
4323 out:
4324 return status;
4325 }
4326
4327 /*
4328 * Decode RENEW response
4329 */
4330 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
4331 {
4332 struct xdr_stream xdr;
4333 struct compound_hdr hdr;
4334 int status;
4335
4336 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4337 status = decode_compound_hdr(&xdr, &hdr);
4338 if (!status)
4339 status = decode_renew(&xdr);
4340 return status;
4341 }
4342
4343 /*
4344 * a SETCLIENTID request
4345 */
4346 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
4347 struct nfs_client *clp)
4348 {
4349 struct xdr_stream xdr;
4350 struct compound_hdr hdr;
4351 int status;
4352
4353 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4354 status = decode_compound_hdr(&xdr, &hdr);
4355 if (!status)
4356 status = decode_setclientid(&xdr, clp);
4357 if (!status)
4358 status = -nfs4_stat_to_errno(hdr.status);
4359 return status;
4360 }
4361
4362 /*
4363 * a SETCLIENTID_CONFIRM request
4364 */
4365 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4366 {
4367 struct xdr_stream xdr;
4368 struct compound_hdr hdr;
4369 int status;
4370
4371 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4372 status = decode_compound_hdr(&xdr, &hdr);
4373 if (!status)
4374 status = decode_setclientid_confirm(&xdr);
4375 if (!status)
4376 status = decode_putrootfh(&xdr);
4377 if (!status)
4378 status = decode_fsinfo(&xdr, fsinfo);
4379 if (!status)
4380 status = -nfs4_stat_to_errno(hdr.status);
4381 return status;
4382 }
4383
4384 /*
4385 * DELEGRETURN request
4386 */
4387 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
4388 {
4389 struct xdr_stream xdr;
4390 struct compound_hdr hdr;
4391 int status;
4392
4393 xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4394 status = decode_compound_hdr(&xdr, &hdr);
4395 if (status != 0)
4396 goto out;
4397 status = decode_putfh(&xdr);
4398 if (status != 0)
4399 goto out;
4400 status = decode_delegreturn(&xdr);
4401 decode_getfattr(&xdr, res->fattr, res->server);
4402 out:
4403 return status;
4404 }
4405
4406 /*
4407 * FS_LOCATIONS request
4408 */
4409 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations *res)
4410 {
4411 struct xdr_stream xdr;
4412 struct compound_hdr hdr;
4413 int status;
4414
4415 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4416 status = decode_compound_hdr(&xdr, &hdr);
4417 if (status != 0)
4418 goto out;
4419 if ((status = decode_putfh(&xdr)) != 0)
4420 goto out;
4421 if ((status = decode_lookup(&xdr)) != 0)
4422 goto out;
4423 xdr_enter_page(&xdr, PAGE_SIZE);
4424 status = decode_getfattr(&xdr, &res->fattr, res->server);
4425 out:
4426 return status;
4427 }
4428
4429 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
4430 {
4431 uint32_t bitmap[2] = {0};
4432 uint32_t len;
4433
4434 if (!*p++) {
4435 if (!*p)
4436 return ERR_PTR(-EAGAIN);
4437 entry->eof = 1;
4438 return ERR_PTR(-EBADCOOKIE);
4439 }
4440
4441 entry->prev_cookie = entry->cookie;
4442 p = xdr_decode_hyper(p, &entry->cookie);
4443 entry->len = ntohl(*p++);
4444 entry->name = (const char *) p;
4445 p += XDR_QUADLEN(entry->len);
4446
4447 /*
4448 * In case the server doesn't return an inode number,
4449 * we fake one here. (We don't use inode number 0,
4450 * since glibc seems to choke on it...)
4451 */
4452 entry->ino = 1;
4453
4454 len = ntohl(*p++); /* bitmap length */
4455 if (len-- > 0) {
4456 bitmap[0] = ntohl(*p++);
4457 if (len-- > 0) {
4458 bitmap[1] = ntohl(*p++);
4459 p += len;
4460 }
4461 }
4462 len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4463 if (len > 0) {
4464 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4465 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4466 /* Ignore the return value of rdattr_error for now */
4467 p++;
4468 len--;
4469 }
4470 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4471 xdr_decode_hyper(p, &entry->ino);
4472 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4473 xdr_decode_hyper(p, &entry->ino);
4474 p += len;
4475 }
4476
4477 entry->eof = !p[0] && p[1];
4478 return p;
4479 }
4480
4481 /*
4482 * We need to translate between nfs status return values and
4483 * the local errno values which may not be the same.
4484 */
4485 static struct {
4486 int stat;
4487 int errno;
4488 } nfs_errtbl[] = {
4489 { NFS4_OK, 0 },
4490 { NFS4ERR_PERM, EPERM },
4491 { NFS4ERR_NOENT, ENOENT },
4492 { NFS4ERR_IO, errno_NFSERR_IO },
4493 { NFS4ERR_NXIO, ENXIO },
4494 { NFS4ERR_ACCESS, EACCES },
4495 { NFS4ERR_EXIST, EEXIST },
4496 { NFS4ERR_XDEV, EXDEV },
4497 { NFS4ERR_NOTDIR, ENOTDIR },
4498 { NFS4ERR_ISDIR, EISDIR },
4499 { NFS4ERR_INVAL, EINVAL },
4500 { NFS4ERR_FBIG, EFBIG },
4501 { NFS4ERR_NOSPC, ENOSPC },
4502 { NFS4ERR_ROFS, EROFS },
4503 { NFS4ERR_MLINK, EMLINK },
4504 { NFS4ERR_NAMETOOLONG, ENAMETOOLONG },
4505 { NFS4ERR_NOTEMPTY, ENOTEMPTY },
4506 { NFS4ERR_DQUOT, EDQUOT },
4507 { NFS4ERR_STALE, ESTALE },
4508 { NFS4ERR_BADHANDLE, EBADHANDLE },
4509 { NFS4ERR_BADOWNER, EINVAL },
4510 { NFS4ERR_BADNAME, EINVAL },
4511 { NFS4ERR_BAD_COOKIE, EBADCOOKIE },
4512 { NFS4ERR_NOTSUPP, ENOTSUPP },
4513 { NFS4ERR_TOOSMALL, ETOOSMALL },
4514 { NFS4ERR_SERVERFAULT, ESERVERFAULT },
4515 { NFS4ERR_BADTYPE, EBADTYPE },
4516 { NFS4ERR_LOCKED, EAGAIN },
4517 { NFS4ERR_RESOURCE, EREMOTEIO },
4518 { NFS4ERR_SYMLINK, ELOOP },
4519 { NFS4ERR_OP_ILLEGAL, EOPNOTSUPP },
4520 { NFS4ERR_DEADLOCK, EDEADLK },
4521 { NFS4ERR_WRONGSEC, EPERM }, /* FIXME: this needs
4522 * to be handled by a
4523 * middle-layer.
4524 */
4525 { -1, EIO }
4526 };
4527
4528 /*
4529 * Convert an NFS error code to a local one.
4530 * This one is used jointly by NFSv2 and NFSv3.
4531 */
4532 static int
4533 nfs4_stat_to_errno(int stat)
4534 {
4535 int i;
4536 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4537 if (nfs_errtbl[i].stat == stat)
4538 return nfs_errtbl[i].errno;
4539 }
4540 if (stat <= 10000 || stat > 10100) {
4541 /* The server is looney tunes. */
4542 return ESERVERFAULT;
4543 }
4544 /* If we cannot translate the error, the recovery routines should
4545 * handle it.
4546 * Note: remaining NFSv4 error codes have values > 10000, so should
4547 * not conflict with native Linux error codes.
4548 */
4549 return stat;
4550 }
4551
4552 #define PROC(proc, argtype, restype) \
4553 [NFSPROC4_CLNT_##proc] = { \
4554 .p_proc = NFSPROC4_COMPOUND, \
4555 .p_encode = (kxdrproc_t) nfs4_xdr_##argtype, \
4556 .p_decode = (kxdrproc_t) nfs4_xdr_##restype, \
4557 .p_arglen = NFS4_##argtype##_sz, \
4558 .p_replen = NFS4_##restype##_sz, \
4559 .p_statidx = NFSPROC4_CLNT_##proc, \
4560 .p_name = #proc, \
4561 }
4562
4563 struct rpc_procinfo nfs4_procedures[] = {
4564 PROC(READ, enc_read, dec_read),
4565 PROC(WRITE, enc_write, dec_write),
4566 PROC(COMMIT, enc_commit, dec_commit),
4567 PROC(OPEN, enc_open, dec_open),
4568 PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
4569 PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
4570 PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
4571 PROC(CLOSE, enc_close, dec_close),
4572 PROC(SETATTR, enc_setattr, dec_setattr),
4573 PROC(FSINFO, enc_fsinfo, dec_fsinfo),
4574 PROC(RENEW, enc_renew, dec_renew),
4575 PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
4576 PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
4577 PROC(LOCK, enc_lock, dec_lock),
4578 PROC(LOCKT, enc_lockt, dec_lockt),
4579 PROC(LOCKU, enc_locku, dec_locku),
4580 PROC(ACCESS, enc_access, dec_access),
4581 PROC(GETATTR, enc_getattr, dec_getattr),
4582 PROC(LOOKUP, enc_lookup, dec_lookup),
4583 PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
4584 PROC(REMOVE, enc_remove, dec_remove),
4585 PROC(RENAME, enc_rename, dec_rename),
4586 PROC(LINK, enc_link, dec_link),
4587 PROC(SYMLINK, enc_symlink, dec_symlink),
4588 PROC(CREATE, enc_create, dec_create),
4589 PROC(PATHCONF, enc_pathconf, dec_pathconf),
4590 PROC(STATFS, enc_statfs, dec_statfs),
4591 PROC(READLINK, enc_readlink, dec_readlink),
4592 PROC(READDIR, enc_readdir, dec_readdir),
4593 PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
4594 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
4595 PROC(GETACL, enc_getacl, dec_getacl),
4596 PROC(SETACL, enc_setacl, dec_setacl),
4597 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
4598 };
4599
4600 struct rpc_version nfs_version4 = {
4601 .number = 4,
4602 .nrprocs = ARRAY_SIZE(nfs4_procedures),
4603 .procs = nfs4_procedures
4604 };
4605
4606 /*
4607 * Local variables:
4608 * c-basic-offset: 8
4609 * End:
4610 */
kmemtrace - Kernel memory tracer