1 /*-
2 * Copyright (c) 2006-2008 Marcel Moolenaar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD: releng/8.0/sys/geom/part/g_part_apm.c 190461 2009-03-27 05:35:12Z marcel $");
29
30 #include <sys/param.h>
31 #include <sys/apm.h>
32 #include <sys/bio.h>
33 #include <sys/diskmbr.h>
34 #include <sys/endian.h>
35 #include <sys/kernel.h>
36 #include <sys/kobj.h>
37 #include <sys/limits.h>
38 #include <sys/lock.h>
39 #include <sys/malloc.h>
40 #include <sys/mutex.h>
41 #include <sys/queue.h>
42 #include <sys/sbuf.h>
43 #include <sys/systm.h>
44 #include <geom/geom.h>
45 #include <geom/part/g_part.h>
46
47 #include "g_part_if.h"
48
49 struct g_part_apm_table {
50 struct g_part_table base;
51 struct apm_ddr ddr;
52 struct apm_ent self;
53 int tivo_series1;
54 };
55
56 struct g_part_apm_entry {
57 struct g_part_entry base;
58 struct apm_ent ent;
59 };
60
61 static int g_part_apm_add(struct g_part_table *, struct g_part_entry *,
62 struct g_part_parms *);
63 static int g_part_apm_create(struct g_part_table *, struct g_part_parms *);
64 static int g_part_apm_destroy(struct g_part_table *, struct g_part_parms *);
65 static void g_part_apm_dumpconf(struct g_part_table *, struct g_part_entry *,
66 struct sbuf *, const char *);
67 static int g_part_apm_dumpto(struct g_part_table *, struct g_part_entry *);
68 static int g_part_apm_modify(struct g_part_table *, struct g_part_entry *,
69 struct g_part_parms *);
70 static const char *g_part_apm_name(struct g_part_table *, struct g_part_entry *,
71 char *, size_t);
72 static int g_part_apm_probe(struct g_part_table *, struct g_consumer *);
73 static int g_part_apm_read(struct g_part_table *, struct g_consumer *);
74 static const char *g_part_apm_type(struct g_part_table *, struct g_part_entry *,
75 char *, size_t);
76 static int g_part_apm_write(struct g_part_table *, struct g_consumer *);
77
78 static kobj_method_t g_part_apm_methods[] = {
79 KOBJMETHOD(g_part_add, g_part_apm_add),
80 KOBJMETHOD(g_part_create, g_part_apm_create),
81 KOBJMETHOD(g_part_destroy, g_part_apm_destroy),
82 KOBJMETHOD(g_part_dumpconf, g_part_apm_dumpconf),
83 KOBJMETHOD(g_part_dumpto, g_part_apm_dumpto),
84 KOBJMETHOD(g_part_modify, g_part_apm_modify),
85 KOBJMETHOD(g_part_name, g_part_apm_name),
86 KOBJMETHOD(g_part_probe, g_part_apm_probe),
87 KOBJMETHOD(g_part_read, g_part_apm_read),
88 KOBJMETHOD(g_part_type, g_part_apm_type),
89 KOBJMETHOD(g_part_write, g_part_apm_write),
90 { 0, 0 }
91 };
92
93 static struct g_part_scheme g_part_apm_scheme = {
94 "APM",
95 g_part_apm_methods,
96 sizeof(struct g_part_apm_table),
97 .gps_entrysz = sizeof(struct g_part_apm_entry),
98 .gps_minent = 16,
99 .gps_maxent = INT_MAX,
100 };
101 G_PART_SCHEME_DECLARE(g_part_apm);
102
103 static void
104 swab(char *buf, size_t bufsz)
105 {
106 int i;
107 char ch;
108
109 for (i = 0; i < bufsz; i += 2) {
110 ch = buf[i];
111 buf[i] = buf[i + 1];
112 buf[i + 1] = ch;
113 }
114 }
115
116 static int
117 apm_parse_type(const char *type, char *buf, size_t bufsz)
118 {
119 const char *alias;
120
121 if (type[0] == '!') {
122 type++;
123 if (strlen(type) > bufsz)
124 return (EINVAL);
125 if (!strcmp(type, APM_ENT_TYPE_SELF) ||
126 !strcmp(type, APM_ENT_TYPE_UNUSED))
127 return (EINVAL);
128 strncpy(buf, type, bufsz);
129 return (0);
130 }
131 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD);
132 if (!strcasecmp(type, alias)) {
133 strcpy(buf, APM_ENT_TYPE_FREEBSD);
134 return (0);
135 }
136 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP);
137 if (!strcasecmp(type, alias)) {
138 strcpy(buf, APM_ENT_TYPE_FREEBSD_SWAP);
139 return (0);
140 }
141 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS);
142 if (!strcasecmp(type, alias)) {
143 strcpy(buf, APM_ENT_TYPE_FREEBSD_UFS);
144 return (0);
145 }
146 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM);
147 if (!strcasecmp(type, alias)) {
148 strcpy(buf, APM_ENT_TYPE_FREEBSD_VINUM);
149 return (0);
150 }
151 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS);
152 if (!strcasecmp(type, alias)) {
153 strcpy(buf, APM_ENT_TYPE_FREEBSD_ZFS);
154 return (0);
155 }
156 return (EINVAL);
157 }
158
159 static int
160 apm_read_ent(struct g_consumer *cp, uint32_t blk, struct apm_ent *ent,
161 int tivo_series1)
162 {
163 struct g_provider *pp;
164 char *buf;
165 int error;
166
167 pp = cp->provider;
168 buf = g_read_data(cp, pp->sectorsize * blk, pp->sectorsize, &error);
169 if (buf == NULL)
170 return (error);
171 if (tivo_series1)
172 swab(buf, pp->sectorsize);
173 ent->ent_sig = be16dec(buf);
174 ent->ent_pmblkcnt = be32dec(buf + 4);
175 ent->ent_start = be32dec(buf + 8);
176 ent->ent_size = be32dec(buf + 12);
177 bcopy(buf + 16, ent->ent_name, sizeof(ent->ent_name));
178 bcopy(buf + 48, ent->ent_type, sizeof(ent->ent_type));
179 g_free(buf);
180 return (0);
181 }
182
183 static int
184 g_part_apm_add(struct g_part_table *basetable, struct g_part_entry *baseentry,
185 struct g_part_parms *gpp)
186 {
187 struct g_part_apm_entry *entry;
188 struct g_part_apm_table *table;
189 int error;
190
191 entry = (struct g_part_apm_entry *)baseentry;
192 table = (struct g_part_apm_table *)basetable;
193 entry->ent.ent_sig = APM_ENT_SIG;
194 entry->ent.ent_pmblkcnt = table->self.ent_pmblkcnt;
195 entry->ent.ent_start = gpp->gpp_start;
196 entry->ent.ent_size = gpp->gpp_size;
197 if (baseentry->gpe_deleted) {
198 bzero(entry->ent.ent_type, sizeof(entry->ent.ent_type));
199 bzero(entry->ent.ent_name, sizeof(entry->ent.ent_name));
200 }
201 error = apm_parse_type(gpp->gpp_type, entry->ent.ent_type,
202 sizeof(entry->ent.ent_type));
203 if (error)
204 return (error);
205 if (gpp->gpp_parms & G_PART_PARM_LABEL) {
206 if (strlen(gpp->gpp_label) > sizeof(entry->ent.ent_name))
207 return (EINVAL);
208 strncpy(entry->ent.ent_name, gpp->gpp_label,
209 sizeof(entry->ent.ent_name));
210 }
211 return (0);
212 }
213
214 static int
215 g_part_apm_create(struct g_part_table *basetable, struct g_part_parms *gpp)
216 {
217 struct g_provider *pp;
218 struct g_part_apm_table *table;
219 uint32_t last;
220
221 /* We don't nest, which means that our depth should be 0. */
222 if (basetable->gpt_depth != 0)
223 return (ENXIO);
224
225 table = (struct g_part_apm_table *)basetable;
226 pp = gpp->gpp_provider;
227 if (pp->sectorsize != 512 ||
228 pp->mediasize < (2 + 2 * basetable->gpt_entries) * pp->sectorsize)
229 return (ENOSPC);
230
231 /* APM uses 32-bit LBAs. */
232 last = MIN(pp->mediasize / pp->sectorsize, 0xffffffff) - 1;
233
234 basetable->gpt_first = 2 + basetable->gpt_entries;
235 basetable->gpt_last = last;
236
237 table->ddr.ddr_sig = APM_DDR_SIG;
238 table->ddr.ddr_blksize = pp->sectorsize;
239 table->ddr.ddr_blkcount = last + 1;
240
241 table->self.ent_sig = APM_ENT_SIG;
242 table->self.ent_pmblkcnt = basetable->gpt_entries + 1;
243 table->self.ent_start = 1;
244 table->self.ent_size = table->self.ent_pmblkcnt;
245 strcpy(table->self.ent_name, "Apple");
246 strcpy(table->self.ent_type, APM_ENT_TYPE_SELF);
247 return (0);
248 }
249
250 static int
251 g_part_apm_destroy(struct g_part_table *basetable, struct g_part_parms *gpp)
252 {
253
254 /* Wipe the first 2 sectors to clear the partitioning. */
255 basetable->gpt_smhead |= 3;
256 return (0);
257 }
258
259 static void
260 g_part_apm_dumpconf(struct g_part_table *table, struct g_part_entry *baseentry,
261 struct sbuf *sb, const char *indent)
262 {
263 union {
264 char name[APM_ENT_NAMELEN + 1];
265 char type[APM_ENT_TYPELEN + 1];
266 } u;
267 struct g_part_apm_entry *entry;
268
269 entry = (struct g_part_apm_entry *)baseentry;
270 if (indent == NULL) {
271 /* conftxt: libdisk compatibility */
272 sbuf_printf(sb, " xs APPLE xt %s", entry->ent.ent_type);
273 } else if (entry != NULL) {
274 /* confxml: partition entry information */
275 strncpy(u.name, entry->ent.ent_name, APM_ENT_NAMELEN);
276 u.name[APM_ENT_NAMELEN] = '\0';
277 sbuf_printf(sb, "%s<label>%s</label>\n", indent, u.name);
278 strncpy(u.type, entry->ent.ent_type, APM_ENT_TYPELEN);
279 u.type[APM_ENT_TYPELEN] = '\0';
280 sbuf_printf(sb, "%s<rawtype>%s</rawtype>\n", indent, u.type);
281 } else {
282 /* confxml: scheme information */
283 }
284 }
285
286 static int
287 g_part_apm_dumpto(struct g_part_table *table, struct g_part_entry *baseentry)
288 {
289 struct g_part_apm_entry *entry;
290
291 entry = (struct g_part_apm_entry *)baseentry;
292 return ((!strcmp(entry->ent.ent_type, APM_ENT_TYPE_FREEBSD_SWAP))
293 ? 1 : 0);
294 }
295
296 static int
297 g_part_apm_modify(struct g_part_table *basetable,
298 struct g_part_entry *baseentry, struct g_part_parms *gpp)
299 {
300 struct g_part_apm_entry *entry;
301 int error;
302
303 entry = (struct g_part_apm_entry *)baseentry;
304 if (gpp->gpp_parms & G_PART_PARM_LABEL) {
305 if (strlen(gpp->gpp_label) > sizeof(entry->ent.ent_name))
306 return (EINVAL);
307 }
308 if (gpp->gpp_parms & G_PART_PARM_TYPE) {
309 error = apm_parse_type(gpp->gpp_type, entry->ent.ent_type,
310 sizeof(entry->ent.ent_type));
311 if (error)
312 return (error);
313 }
314 if (gpp->gpp_parms & G_PART_PARM_LABEL) {
315 strncpy(entry->ent.ent_name, gpp->gpp_label,
316 sizeof(entry->ent.ent_name));
317 }
318 return (0);
319 }
320
321 static const char *
322 g_part_apm_name(struct g_part_table *table, struct g_part_entry *baseentry,
323 char *buf, size_t bufsz)
324 {
325
326 snprintf(buf, bufsz, "s%d", baseentry->gpe_index + 1);
327 return (buf);
328 }
329
330 static int
331 g_part_apm_probe(struct g_part_table *basetable, struct g_consumer *cp)
332 {
333 struct g_provider *pp;
334 struct g_part_apm_table *table;
335 char *buf;
336 int error;
337
338 /* We don't nest, which means that our depth should be 0. */
339 if (basetable->gpt_depth != 0)
340 return (ENXIO);
341
342 table = (struct g_part_apm_table *)basetable;
343 table->tivo_series1 = 0;
344 pp = cp->provider;
345
346 /* Sanity-check the provider. */
347 if (pp->mediasize < 4 * pp->sectorsize)
348 return (ENOSPC);
349
350 /* Check that there's a Driver Descriptor Record (DDR). */
351 buf = g_read_data(cp, 0L, pp->sectorsize, &error);
352 if (buf == NULL)
353 return (error);
354 if (be16dec(buf) == be16toh(APM_DDR_SIG)) {
355 /* Normal Apple DDR */
356 table->ddr.ddr_sig = be16dec(buf);
357 table->ddr.ddr_blksize = be16dec(buf + 2);
358 table->ddr.ddr_blkcount = be32dec(buf + 4);
359 g_free(buf);
360 if (table->ddr.ddr_blksize != pp->sectorsize)
361 return (ENXIO);
362 } else {
363 /*
364 * Check for Tivo drives, which have no DDR and a different
365 * signature. Those whose first two bytes are 14 92 are
366 * Series 2 drives, and aren't supported. Those that start
367 * with 92 14 are series 1 drives and are supported.
368 */
369 if (be16dec(buf) != 0x9214) {
370 /* If this is 0x1492 it could be a series 2 drive */
371 g_free(buf);
372 return (ENXIO);
373 }
374 table->ddr.ddr_sig = APM_DDR_SIG; /* XXX */
375 table->ddr.ddr_blksize = pp->sectorsize; /* XXX */
376 table->ddr.ddr_blkcount = pp->mediasize / pp->sectorsize;/* XXX */
377 table->tivo_series1 = 1;
378 g_free(buf);
379 }
380
381 /* Check that there's a Partition Map. */
382 error = apm_read_ent(cp, 1, &table->self, table->tivo_series1);
383 if (error)
384 return (error);
385 if (table->self.ent_sig != APM_ENT_SIG)
386 return (ENXIO);
387 if (strcmp(table->self.ent_type, APM_ENT_TYPE_SELF))
388 return (ENXIO);
389 if (table->self.ent_pmblkcnt >= table->ddr.ddr_blkcount)
390 return (ENXIO);
391 return (G_PART_PROBE_PRI_NORM);
392 }
393
394 static int
395 g_part_apm_read(struct g_part_table *basetable, struct g_consumer *cp)
396 {
397 struct apm_ent ent;
398 struct g_part_apm_entry *entry;
399 struct g_part_apm_table *table;
400 int error, index;
401
402 table = (struct g_part_apm_table *)basetable;
403
404 basetable->gpt_first = table->self.ent_pmblkcnt + 1;
405 basetable->gpt_last = table->ddr.ddr_blkcount - 1;
406 basetable->gpt_entries = table->self.ent_pmblkcnt - 1;
407
408 for (index = table->self.ent_pmblkcnt - 1; index > 0; index--) {
409 error = apm_read_ent(cp, index + 1, &ent, table->tivo_series1);
410 if (error)
411 continue;
412 if (!strcmp(ent.ent_type, APM_ENT_TYPE_UNUSED))
413 continue;
414 entry = (struct g_part_apm_entry *)g_part_new_entry(basetable,
415 index, ent.ent_start, ent.ent_start + ent.ent_size - 1);
416 entry->ent = ent;
417 }
418
419 return (0);
420 }
421
422 static const char *
423 g_part_apm_type(struct g_part_table *basetable, struct g_part_entry *baseentry,
424 char *buf, size_t bufsz)
425 {
426 struct g_part_apm_entry *entry;
427 const char *type;
428 size_t len;
429
430 entry = (struct g_part_apm_entry *)baseentry;
431 type = entry->ent.ent_type;
432 if (!strcmp(type, APM_ENT_TYPE_FREEBSD))
433 return (g_part_alias_name(G_PART_ALIAS_FREEBSD));
434 if (!strcmp(type, APM_ENT_TYPE_FREEBSD_SWAP))
435 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP));
436 if (!strcmp(type, APM_ENT_TYPE_FREEBSD_UFS))
437 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS));
438 if (!strcmp(type, APM_ENT_TYPE_FREEBSD_VINUM))
439 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM));
440 if (!strcmp(type, APM_ENT_TYPE_FREEBSD_ZFS))
441 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS));
442 buf[0] = '!';
443 len = MIN(sizeof(entry->ent.ent_type), bufsz - 2);
444 bcopy(type, buf + 1, len);
445 buf[len + 1] = '\0';
446 return (buf);
447 }
448
449 static int
450 g_part_apm_write(struct g_part_table *basetable, struct g_consumer *cp)
451 {
452 char buf[512];
453 struct g_part_entry *baseentry;
454 struct g_part_apm_entry *entry;
455 struct g_part_apm_table *table;
456 int error, index;
457
458 table = (struct g_part_apm_table *)basetable;
459 /*
460 * Tivo Series 1 disk partitions are currently read-only.
461 */
462 if (table->tivo_series1)
463 return (EOPNOTSUPP);
464 bzero(buf, sizeof(buf));
465
466 /* Write the DDR and 'self' entry only when we're newly created. */
467 if (basetable->gpt_created) {
468 be16enc(buf, table->ddr.ddr_sig);
469 be16enc(buf + 2, table->ddr.ddr_blksize);
470 be32enc(buf + 4, table->ddr.ddr_blkcount);
471 error = g_write_data(cp, 0, buf, sizeof(buf));
472 if (error)
473 return (error);
474 }
475
476 be16enc(buf, table->self.ent_sig);
477 be16enc(buf + 2, 0);
478 be32enc(buf + 4, table->self.ent_pmblkcnt);
479
480 if (basetable->gpt_created) {
481 be32enc(buf + 8, table->self.ent_start);
482 be32enc(buf + 12, table->self.ent_size);
483 bcopy(table->self.ent_name, buf + 16,
484 sizeof(table->self.ent_name));
485 bcopy(table->self.ent_type, buf + 48,
486 sizeof(table->self.ent_type));
487 error = g_write_data(cp, 512, buf, sizeof(buf));
488 if (error)
489 return (error);
490 }
491
492 baseentry = LIST_FIRST(&basetable->gpt_entry);
493 for (index = 1; index <= basetable->gpt_entries; index++) {
494 entry = (baseentry != NULL && index == baseentry->gpe_index)
495 ? (struct g_part_apm_entry *)baseentry : NULL;
496 if (entry != NULL && !baseentry->gpe_deleted) {
497 be32enc(buf + 8, entry->ent.ent_start);
498 be32enc(buf + 12, entry->ent.ent_size);
499 bcopy(entry->ent.ent_name, buf + 16,
500 sizeof(entry->ent.ent_name));
501 bcopy(entry->ent.ent_type, buf + 48,
502 sizeof(entry->ent.ent_type));
503 } else {
504 bzero(buf + 8, 4 + 4 + 32 + 32);
505 strcpy(buf + 48, APM_ENT_TYPE_UNUSED);
506 }
507 error = g_write_data(cp, (index + 1) * 512, buf, sizeof(buf));
508 if (error)
509 return (error);
510 if (entry != NULL)
511 baseentry = LIST_NEXT(baseentry, gpe_entry);
512 }
513
514 return (0);
515 }
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