1 /*-
2 * Copyright (c) 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: stable/9/sys/geom/part/g_part_pc98.c 267157 2014-06-06 12:45:11Z ae $");
29
30 #include <sys/param.h>
31 #include <sys/bio.h>
32 #include <sys/diskpc98.h>
33 #include <sys/endian.h>
34 #include <sys/kernel.h>
35 #include <sys/kobj.h>
36 #include <sys/limits.h>
37 #include <sys/lock.h>
38 #include <sys/malloc.h>
39 #include <sys/mutex.h>
40 #include <sys/queue.h>
41 #include <sys/sbuf.h>
42 #include <sys/systm.h>
43 #include <sys/sysctl.h>
44 #include <geom/geom.h>
45 #include <geom/geom_int.h>
46 #include <geom/part/g_part.h>
47
48 #include "g_part_if.h"
49
50 FEATURE(geom_part_pc98, "GEOM partitioning class for PC-9800 disk partitions");
51
52 #define SECSIZE 512
53 #define MENUSIZE 7168
54 #define BOOTSIZE 8192
55
56 struct g_part_pc98_table {
57 struct g_part_table base;
58 u_char boot[SECSIZE];
59 u_char table[SECSIZE];
60 u_char menu[MENUSIZE];
61 };
62
63 struct g_part_pc98_entry {
64 struct g_part_entry base;
65 struct pc98_partition ent;
66 };
67
68 static int g_part_pc98_add(struct g_part_table *, struct g_part_entry *,
69 struct g_part_parms *);
70 static int g_part_pc98_bootcode(struct g_part_table *, struct g_part_parms *);
71 static int g_part_pc98_create(struct g_part_table *, struct g_part_parms *);
72 static int g_part_pc98_destroy(struct g_part_table *, struct g_part_parms *);
73 static void g_part_pc98_dumpconf(struct g_part_table *, struct g_part_entry *,
74 struct sbuf *, const char *);
75 static int g_part_pc98_dumpto(struct g_part_table *, struct g_part_entry *);
76 static int g_part_pc98_modify(struct g_part_table *, struct g_part_entry *,
77 struct g_part_parms *);
78 static const char *g_part_pc98_name(struct g_part_table *, struct g_part_entry *,
79 char *, size_t);
80 static int g_part_pc98_probe(struct g_part_table *, struct g_consumer *);
81 static int g_part_pc98_read(struct g_part_table *, struct g_consumer *);
82 static int g_part_pc98_setunset(struct g_part_table *, struct g_part_entry *,
83 const char *, unsigned int);
84 static const char *g_part_pc98_type(struct g_part_table *,
85 struct g_part_entry *, char *, size_t);
86 static int g_part_pc98_write(struct g_part_table *, struct g_consumer *);
87 static int g_part_pc98_resize(struct g_part_table *, struct g_part_entry *,
88 struct g_part_parms *);
89
90 static kobj_method_t g_part_pc98_methods[] = {
91 KOBJMETHOD(g_part_add, g_part_pc98_add),
92 KOBJMETHOD(g_part_bootcode, g_part_pc98_bootcode),
93 KOBJMETHOD(g_part_create, g_part_pc98_create),
94 KOBJMETHOD(g_part_destroy, g_part_pc98_destroy),
95 KOBJMETHOD(g_part_dumpconf, g_part_pc98_dumpconf),
96 KOBJMETHOD(g_part_dumpto, g_part_pc98_dumpto),
97 KOBJMETHOD(g_part_modify, g_part_pc98_modify),
98 KOBJMETHOD(g_part_resize, g_part_pc98_resize),
99 KOBJMETHOD(g_part_name, g_part_pc98_name),
100 KOBJMETHOD(g_part_probe, g_part_pc98_probe),
101 KOBJMETHOD(g_part_read, g_part_pc98_read),
102 KOBJMETHOD(g_part_setunset, g_part_pc98_setunset),
103 KOBJMETHOD(g_part_type, g_part_pc98_type),
104 KOBJMETHOD(g_part_write, g_part_pc98_write),
105 { 0, 0 }
106 };
107
108 static struct g_part_scheme g_part_pc98_scheme = {
109 "PC98",
110 g_part_pc98_methods,
111 sizeof(struct g_part_pc98_table),
112 .gps_entrysz = sizeof(struct g_part_pc98_entry),
113 .gps_minent = NDOSPART,
114 .gps_maxent = NDOSPART,
115 .gps_bootcodesz = BOOTSIZE,
116 };
117 G_PART_SCHEME_DECLARE(g_part_pc98);
118
119 static int
pc98_parse_type(const char * type,u_char * dp_mid,u_char * dp_sid)120 pc98_parse_type(const char *type, u_char *dp_mid, u_char *dp_sid)
121 {
122 const char *alias;
123 char *endp;
124 long lt;
125
126 if (type[0] == '!') {
127 lt = strtol(type + 1, &endp, 0);
128 if (type[1] == '\0' || *endp != '\0' || lt <= 0 ||
129 lt >= 65536)
130 return (EINVAL);
131 /* Make sure the active and bootable flags aren't set. */
132 if (lt & ((PC98_SID_ACTIVE << 8) | PC98_MID_BOOTABLE))
133 return (ENOATTR);
134 *dp_mid = (*dp_mid & PC98_MID_BOOTABLE) | (u_char)lt;
135 *dp_sid = (*dp_sid & PC98_SID_ACTIVE) | (u_char)(lt >> 8);
136 return (0);
137 }
138 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD);
139 if (!strcasecmp(type, alias)) {
140 *dp_mid = (*dp_mid & PC98_MID_BOOTABLE) | PC98_MID_386BSD;
141 *dp_sid = (*dp_sid & PC98_SID_ACTIVE) | PC98_SID_386BSD;
142 return (0);
143 }
144 return (EINVAL);
145 }
146
147 static int
pc98_set_slicename(const char * label,u_char * dp_name)148 pc98_set_slicename(const char *label, u_char *dp_name)
149 {
150 int len;
151
152 len = strlen(label);
153 if (len > sizeof(((struct pc98_partition *)NULL)->dp_name))
154 return (EINVAL);
155 bzero(dp_name, sizeof(((struct pc98_partition *)NULL)->dp_name));
156 strncpy(dp_name, label, len);
157
158 return (0);
159 }
160
161 static void
pc98_set_chs(struct g_part_table * table,uint32_t lba,u_short * cylp,u_char * hdp,u_char * secp)162 pc98_set_chs(struct g_part_table *table, uint32_t lba, u_short *cylp,
163 u_char *hdp, u_char *secp)
164 {
165 uint32_t cyl, hd, sec;
166
167 sec = lba % table->gpt_sectors + 1;
168 lba /= table->gpt_sectors;
169 hd = lba % table->gpt_heads;
170 lba /= table->gpt_heads;
171 cyl = lba;
172
173 *cylp = htole16(cyl);
174 *hdp = hd;
175 *secp = sec;
176 }
177
178 static int
pc98_align(struct g_part_table * basetable,uint32_t * start,uint32_t * size)179 pc98_align(struct g_part_table *basetable, uint32_t *start, uint32_t *size)
180 {
181 uint32_t cyl;
182
183 cyl = basetable->gpt_heads * basetable->gpt_sectors;
184 if (*size < cyl)
185 return (EINVAL);
186 if (start != NULL && (*start % cyl)) {
187 *size += (*start % cyl) - cyl;
188 *start -= (*start % cyl) - cyl;
189 }
190 if (*size % cyl)
191 *size -= (*size % cyl);
192 if (*size < cyl)
193 return (EINVAL);
194 return (0);
195 }
196
197 static int
g_part_pc98_add(struct g_part_table * basetable,struct g_part_entry * baseentry,struct g_part_parms * gpp)198 g_part_pc98_add(struct g_part_table *basetable, struct g_part_entry *baseentry,
199 struct g_part_parms *gpp)
200 {
201 struct g_part_pc98_entry *entry;
202 uint32_t start, size;
203 int error;
204
205 entry = (struct g_part_pc98_entry *)baseentry;
206 start = gpp->gpp_start;
207 size = gpp->gpp_size;
208 if (pc98_align(basetable, &start, &size) != 0)
209 return (EINVAL);
210 if (baseentry->gpe_deleted)
211 bzero(&entry->ent, sizeof(entry->ent));
212 else
213 entry->ent.dp_mid = entry->ent.dp_sid = 0;
214
215 KASSERT(baseentry->gpe_start <= start, (__func__));
216 KASSERT(baseentry->gpe_end >= start + size - 1, (__func__));
217 baseentry->gpe_start = start;
218 baseentry->gpe_end = start + size - 1;
219 pc98_set_chs(basetable, baseentry->gpe_start, &entry->ent.dp_scyl,
220 &entry->ent.dp_shd, &entry->ent.dp_ssect);
221 pc98_set_chs(basetable, baseentry->gpe_end, &entry->ent.dp_ecyl,
222 &entry->ent.dp_ehd, &entry->ent.dp_esect);
223
224 error = pc98_parse_type(gpp->gpp_type, &entry->ent.dp_mid,
225 &entry->ent.dp_sid);
226 if (error)
227 return (error);
228
229 if (gpp->gpp_parms & G_PART_PARM_LABEL)
230 return (pc98_set_slicename(gpp->gpp_label, entry->ent.dp_name));
231
232 return (0);
233 }
234
235 static int
g_part_pc98_bootcode(struct g_part_table * basetable,struct g_part_parms * gpp)236 g_part_pc98_bootcode(struct g_part_table *basetable, struct g_part_parms *gpp)
237 {
238 struct g_part_pc98_table *table;
239 const u_char *codeptr;
240
241 if (gpp->gpp_codesize != BOOTSIZE)
242 return (EINVAL);
243
244 table = (struct g_part_pc98_table *)basetable;
245 codeptr = gpp->gpp_codeptr;
246 bcopy(codeptr, table->boot, SECSIZE);
247 bcopy(codeptr + SECSIZE*2, table->menu, MENUSIZE);
248
249 return (0);
250 }
251
252 static int
g_part_pc98_create(struct g_part_table * basetable,struct g_part_parms * gpp)253 g_part_pc98_create(struct g_part_table *basetable, struct g_part_parms *gpp)
254 {
255 struct g_provider *pp;
256 struct g_part_pc98_table *table;
257
258 pp = gpp->gpp_provider;
259 if (pp->sectorsize < SECSIZE || pp->mediasize < BOOTSIZE)
260 return (ENOSPC);
261 if (pp->sectorsize > SECSIZE)
262 return (ENXIO);
263
264 basetable->gpt_first = basetable->gpt_heads * basetable->gpt_sectors;
265 basetable->gpt_last = MIN(pp->mediasize / SECSIZE, UINT32_MAX) - 1;
266
267 table = (struct g_part_pc98_table *)basetable;
268 le16enc(table->boot + DOSMAGICOFFSET, DOSMAGIC);
269 return (0);
270 }
271
272 static int
g_part_pc98_destroy(struct g_part_table * basetable,struct g_part_parms * gpp)273 g_part_pc98_destroy(struct g_part_table *basetable, struct g_part_parms *gpp)
274 {
275
276 /* Wipe the first two sectors to clear the partitioning. */
277 basetable->gpt_smhead |= 3;
278 return (0);
279 }
280
281 static void
g_part_pc98_dumpconf(struct g_part_table * table,struct g_part_entry * baseentry,struct sbuf * sb,const char * indent)282 g_part_pc98_dumpconf(struct g_part_table *table,
283 struct g_part_entry *baseentry, struct sbuf *sb, const char *indent)
284 {
285 struct g_part_pc98_entry *entry;
286 char name[sizeof(entry->ent.dp_name) + 1];
287 u_int type;
288
289 entry = (struct g_part_pc98_entry *)baseentry;
290 if (entry == NULL) {
291 /* confxml: scheme information */
292 return;
293 }
294
295 type = entry->ent.dp_mid + (entry->ent.dp_sid << 8);
296 strncpy(name, entry->ent.dp_name, sizeof(name) - 1);
297 name[sizeof(name) - 1] = '\0';
298 if (indent == NULL) {
299 /* conftxt: libdisk compatibility */
300 sbuf_printf(sb, " xs PC98 xt %u sn %s", type, name);
301 } else {
302 /* confxml: partition entry information */
303 sbuf_printf(sb, "%s<label>", indent);
304 g_conf_printf_escaped(sb, "%s", name);
305 sbuf_printf(sb, "</label>\n");
306 if (entry->ent.dp_mid & PC98_MID_BOOTABLE)
307 sbuf_printf(sb, "%s<attrib>bootable</attrib>\n",
308 indent);
309 if (entry->ent.dp_sid & PC98_SID_ACTIVE)
310 sbuf_printf(sb, "%s<attrib>active</attrib>\n", indent);
311 sbuf_printf(sb, "%s<rawtype>%u</rawtype>\n", indent,
312 type & 0x7f7f);
313 }
314 }
315
316 static int
g_part_pc98_dumpto(struct g_part_table * table,struct g_part_entry * baseentry)317 g_part_pc98_dumpto(struct g_part_table *table, struct g_part_entry *baseentry)
318 {
319 struct g_part_pc98_entry *entry;
320
321 /* Allow dumping to a FreeBSD partition only. */
322 entry = (struct g_part_pc98_entry *)baseentry;
323 return (((entry->ent.dp_mid & PC98_MID_MASK) == PC98_MID_386BSD &&
324 (entry->ent.dp_sid & PC98_SID_MASK) == PC98_SID_386BSD) ? 1 : 0);
325 }
326
327 static int
g_part_pc98_modify(struct g_part_table * basetable,struct g_part_entry * baseentry,struct g_part_parms * gpp)328 g_part_pc98_modify(struct g_part_table *basetable,
329 struct g_part_entry *baseentry, struct g_part_parms *gpp)
330 {
331 struct g_part_pc98_entry *entry;
332 int error;
333
334 entry = (struct g_part_pc98_entry *)baseentry;
335
336 if (gpp->gpp_parms & G_PART_PARM_TYPE) {
337 error = pc98_parse_type(gpp->gpp_type, &entry->ent.dp_mid,
338 &entry->ent.dp_sid);
339 if (error)
340 return (error);
341 }
342
343 if (gpp->gpp_parms & G_PART_PARM_LABEL)
344 return (pc98_set_slicename(gpp->gpp_label, entry->ent.dp_name));
345
346 return (0);
347 }
348
349 static int
g_part_pc98_resize(struct g_part_table * basetable,struct g_part_entry * baseentry,struct g_part_parms * gpp)350 g_part_pc98_resize(struct g_part_table *basetable,
351 struct g_part_entry *baseentry, struct g_part_parms *gpp)
352 {
353 struct g_part_pc98_entry *entry;
354 struct g_provider *pp;
355 uint32_t size;
356
357 size = gpp->gpp_size;
358 if (pc98_align(basetable, NULL, &size) != 0)
359 return (EINVAL);
360 /* XXX: prevent unexpected shrinking. */
361 pp = baseentry->gpe_pp;
362 if ((g_debugflags & 0x10) == 0 && size < gpp->gpp_size &&
363 pp->mediasize / pp->sectorsize > size)
364 return (EBUSY);
365 entry = (struct g_part_pc98_entry *)baseentry;
366 baseentry->gpe_end = baseentry->gpe_start + size - 1;
367 pc98_set_chs(basetable, baseentry->gpe_end, &entry->ent.dp_ecyl,
368 &entry->ent.dp_ehd, &entry->ent.dp_esect);
369
370 return (0);
371 }
372
373 static const char *
g_part_pc98_name(struct g_part_table * table,struct g_part_entry * baseentry,char * buf,size_t bufsz)374 g_part_pc98_name(struct g_part_table *table, struct g_part_entry *baseentry,
375 char *buf, size_t bufsz)
376 {
377
378 snprintf(buf, bufsz, "s%d", baseentry->gpe_index);
379 return (buf);
380 }
381
382 static int
g_part_pc98_probe(struct g_part_table * table,struct g_consumer * cp)383 g_part_pc98_probe(struct g_part_table *table, struct g_consumer *cp)
384 {
385 struct g_provider *pp;
386 u_char *buf, *p;
387 int error, index, res, sum;
388 uint16_t magic, ecyl, scyl;
389
390 pp = cp->provider;
391
392 /* Sanity-check the provider. */
393 if (pp->sectorsize < SECSIZE || pp->mediasize < BOOTSIZE)
394 return (ENOSPC);
395 if (pp->sectorsize > SECSIZE)
396 return (ENXIO);
397
398 /* Check that there's a PC98 partition table. */
399 buf = g_read_data(cp, 0L, 2 * SECSIZE, &error);
400 if (buf == NULL)
401 return (error);
402
403 /* We goto out on mismatch. */
404 res = ENXIO;
405
406 magic = le16dec(buf + DOSMAGICOFFSET);
407 if (magic != DOSMAGIC)
408 goto out;
409
410 sum = 0;
411 for (index = SECSIZE; index < 2 * SECSIZE; index++)
412 sum += buf[index];
413 if (sum == 0) {
414 res = G_PART_PROBE_PRI_LOW;
415 goto out;
416 }
417
418 for (index = 0; index < NDOSPART; index++) {
419 p = buf + SECSIZE + index * DOSPARTSIZE;
420 if (p[0] == 0 || p[1] == 0) /* !dp_mid || !dp_sid */
421 continue;
422 scyl = le16dec(p + 10);
423 ecyl = le16dec(p + 14);
424 if (scyl == 0 || ecyl == 0)
425 goto out;
426 if (p[8] == p[12] && /* dp_ssect == dp_esect */
427 p[9] == p[13] && /* dp_shd == dp_ehd */
428 scyl == ecyl)
429 goto out;
430 }
431
432 res = G_PART_PROBE_PRI_HIGH;
433
434 out:
435 g_free(buf);
436 return (res);
437 }
438
439 static int
g_part_pc98_read(struct g_part_table * basetable,struct g_consumer * cp)440 g_part_pc98_read(struct g_part_table *basetable, struct g_consumer *cp)
441 {
442 struct pc98_partition ent;
443 struct g_provider *pp;
444 struct g_part_pc98_table *table;
445 struct g_part_pc98_entry *entry;
446 u_char *buf, *p;
447 off_t msize;
448 off_t start, end;
449 u_int cyl;
450 int error, index;
451
452 pp = cp->provider;
453 table = (struct g_part_pc98_table *)basetable;
454 msize = MIN(pp->mediasize / SECSIZE, UINT32_MAX);
455
456 buf = g_read_data(cp, 0L, BOOTSIZE, &error);
457 if (buf == NULL)
458 return (error);
459
460 cyl = basetable->gpt_heads * basetable->gpt_sectors;
461
462 bcopy(buf, table->boot, sizeof(table->boot));
463 bcopy(buf + SECSIZE, table->table, sizeof(table->table));
464 bcopy(buf + SECSIZE*2, table->menu, sizeof(table->menu));
465
466 for (index = NDOSPART - 1; index >= 0; index--) {
467 p = buf + SECSIZE + index * DOSPARTSIZE;
468 ent.dp_mid = p[0];
469 ent.dp_sid = p[1];
470 ent.dp_dum1 = p[2];
471 ent.dp_dum2 = p[3];
472 ent.dp_ipl_sct = p[4];
473 ent.dp_ipl_head = p[5];
474 ent.dp_ipl_cyl = le16dec(p + 6);
475 ent.dp_ssect = p[8];
476 ent.dp_shd = p[9];
477 ent.dp_scyl = le16dec(p + 10);
478 ent.dp_esect = p[12];
479 ent.dp_ehd = p[13];
480 ent.dp_ecyl = le16dec(p + 14);
481 bcopy(p + 16, ent.dp_name, sizeof(ent.dp_name));
482 if (ent.dp_sid == 0)
483 continue;
484
485 start = ent.dp_scyl * cyl;
486 end = (ent.dp_ecyl + 1) * cyl - 1;
487 entry = (struct g_part_pc98_entry *)g_part_new_entry(basetable,
488 index + 1, start, end);
489 entry->ent = ent;
490 }
491
492 basetable->gpt_entries = NDOSPART;
493 basetable->gpt_first = cyl;
494 basetable->gpt_last = msize - 1;
495
496 g_free(buf);
497 return (0);
498 }
499
500 static int
g_part_pc98_setunset(struct g_part_table * table,struct g_part_entry * baseentry,const char * attrib,unsigned int set)501 g_part_pc98_setunset(struct g_part_table *table, struct g_part_entry *baseentry,
502 const char *attrib, unsigned int set)
503 {
504 struct g_part_entry *iter;
505 struct g_part_pc98_entry *entry;
506 int changed, mid, sid;
507
508 if (baseentry == NULL)
509 return (ENODEV);
510
511 mid = sid = 0;
512 if (strcasecmp(attrib, "active") == 0)
513 sid = 1;
514 else if (strcasecmp(attrib, "bootable") == 0)
515 mid = 1;
516 if (mid == 0 && sid == 0)
517 return (EINVAL);
518
519 LIST_FOREACH(iter, &table->gpt_entry, gpe_entry) {
520 if (iter->gpe_deleted)
521 continue;
522 if (iter != baseentry)
523 continue;
524 changed = 0;
525 entry = (struct g_part_pc98_entry *)iter;
526 if (set) {
527 if (mid && !(entry->ent.dp_mid & PC98_MID_BOOTABLE)) {
528 entry->ent.dp_mid |= PC98_MID_BOOTABLE;
529 changed = 1;
530 }
531 if (sid && !(entry->ent.dp_sid & PC98_SID_ACTIVE)) {
532 entry->ent.dp_sid |= PC98_SID_ACTIVE;
533 changed = 1;
534 }
535 } else {
536 if (mid && (entry->ent.dp_mid & PC98_MID_BOOTABLE)) {
537 entry->ent.dp_mid &= ~PC98_MID_BOOTABLE;
538 changed = 1;
539 }
540 if (sid && (entry->ent.dp_sid & PC98_SID_ACTIVE)) {
541 entry->ent.dp_sid &= ~PC98_SID_ACTIVE;
542 changed = 1;
543 }
544 }
545 if (changed && !iter->gpe_created)
546 iter->gpe_modified = 1;
547 }
548 return (0);
549 }
550
551 static const char *
g_part_pc98_type(struct g_part_table * basetable,struct g_part_entry * baseentry,char * buf,size_t bufsz)552 g_part_pc98_type(struct g_part_table *basetable, struct g_part_entry *baseentry,
553 char *buf, size_t bufsz)
554 {
555 struct g_part_pc98_entry *entry;
556 u_int type;
557
558 entry = (struct g_part_pc98_entry *)baseentry;
559 type = (entry->ent.dp_mid & PC98_MID_MASK) |
560 ((entry->ent.dp_sid & PC98_SID_MASK) << 8);
561 if (type == (PC98_MID_386BSD | (PC98_SID_386BSD << 8)))
562 return (g_part_alias_name(G_PART_ALIAS_FREEBSD));
563 snprintf(buf, bufsz, "!%d", type);
564 return (buf);
565 }
566
567 static int
g_part_pc98_write(struct g_part_table * basetable,struct g_consumer * cp)568 g_part_pc98_write(struct g_part_table *basetable, struct g_consumer *cp)
569 {
570 struct g_part_entry *baseentry;
571 struct g_part_pc98_entry *entry;
572 struct g_part_pc98_table *table;
573 u_char *p;
574 int error, index;
575
576 table = (struct g_part_pc98_table *)basetable;
577 baseentry = LIST_FIRST(&basetable->gpt_entry);
578 for (index = 1; index <= basetable->gpt_entries; index++) {
579 p = table->table + (index - 1) * DOSPARTSIZE;
580 entry = (baseentry != NULL && index == baseentry->gpe_index)
581 ? (struct g_part_pc98_entry *)baseentry : NULL;
582 if (entry != NULL && !baseentry->gpe_deleted) {
583 p[0] = entry->ent.dp_mid;
584 p[1] = entry->ent.dp_sid;
585 p[2] = entry->ent.dp_dum1;
586 p[3] = entry->ent.dp_dum2;
587 p[4] = entry->ent.dp_ipl_sct;
588 p[5] = entry->ent.dp_ipl_head;
589 le16enc(p + 6, entry->ent.dp_ipl_cyl);
590 p[8] = entry->ent.dp_ssect;
591 p[9] = entry->ent.dp_shd;
592 le16enc(p + 10, entry->ent.dp_scyl);
593 p[12] = entry->ent.dp_esect;
594 p[13] = entry->ent.dp_ehd;
595 le16enc(p + 14, entry->ent.dp_ecyl);
596 bcopy(entry->ent.dp_name, p + 16,
597 sizeof(entry->ent.dp_name));
598 } else
599 bzero(p, DOSPARTSIZE);
600
601 if (entry != NULL)
602 baseentry = LIST_NEXT(baseentry, gpe_entry);
603 }
604
605 error = g_write_data(cp, 0, table->boot, SECSIZE);
606 if (!error)
607 error = g_write_data(cp, SECSIZE, table->table, SECSIZE);
608 if (!error)
609 error = g_write_data(cp, SECSIZE*2, table->menu, MENUSIZE);
610 return (error);
611 }
612