2 * Copyright (c) 2008 Marcel Moolenaar
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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.
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
32 #include <sys/diskpc98.h>
33 #include <sys/endian.h>
34 #include <sys/kernel.h>
36 #include <sys/limits.h>
38 #include <sys/malloc.h>
39 #include <sys/mutex.h>
40 #include <sys/queue.h>
42 #include <sys/systm.h>
43 #include <geom/geom.h>
44 #include <geom/part/g_part.h>
46 #include "g_part_if.h"
50 struct g_part_pc98_table {
51 struct g_part_table base;
53 u_char table[SECSIZE];
56 struct g_part_pc98_entry {
57 struct g_part_entry base;
58 struct pc98_partition ent;
61 static int g_part_pc98_add(struct g_part_table *, struct g_part_entry *,
62 struct g_part_parms *);
63 static int g_part_pc98_bootcode(struct g_part_table *, struct g_part_parms *);
64 static int g_part_pc98_create(struct g_part_table *, struct g_part_parms *);
65 static int g_part_pc98_destroy(struct g_part_table *, struct g_part_parms *);
66 static void g_part_pc98_dumpconf(struct g_part_table *, struct g_part_entry *,
67 struct sbuf *, const char *);
68 static int g_part_pc98_dumpto(struct g_part_table *, struct g_part_entry *);
69 static int g_part_pc98_modify(struct g_part_table *, struct g_part_entry *,
70 struct g_part_parms *);
71 static const char *g_part_pc98_name(struct g_part_table *, struct g_part_entry *,
73 static int g_part_pc98_probe(struct g_part_table *, struct g_consumer *);
74 static int g_part_pc98_read(struct g_part_table *, struct g_consumer *);
75 static int g_part_pc98_setunset(struct g_part_table *, struct g_part_entry *,
76 const char *, unsigned int);
77 static const char *g_part_pc98_type(struct g_part_table *,
78 struct g_part_entry *, char *, size_t);
79 static int g_part_pc98_write(struct g_part_table *, struct g_consumer *);
80 static int g_part_pc98_resize(struct g_part_table *, struct g_part_entry *,
81 struct g_part_parms *);
83 static kobj_method_t g_part_pc98_methods[] = {
84 KOBJMETHOD(g_part_add, g_part_pc98_add),
85 KOBJMETHOD(g_part_bootcode, g_part_pc98_bootcode),
86 KOBJMETHOD(g_part_create, g_part_pc98_create),
87 KOBJMETHOD(g_part_destroy, g_part_pc98_destroy),
88 KOBJMETHOD(g_part_dumpconf, g_part_pc98_dumpconf),
89 KOBJMETHOD(g_part_dumpto, g_part_pc98_dumpto),
90 KOBJMETHOD(g_part_modify, g_part_pc98_modify),
91 KOBJMETHOD(g_part_resize, g_part_pc98_resize),
92 KOBJMETHOD(g_part_name, g_part_pc98_name),
93 KOBJMETHOD(g_part_probe, g_part_pc98_probe),
94 KOBJMETHOD(g_part_read, g_part_pc98_read),
95 KOBJMETHOD(g_part_setunset, g_part_pc98_setunset),
96 KOBJMETHOD(g_part_type, g_part_pc98_type),
97 KOBJMETHOD(g_part_write, g_part_pc98_write),
101 static struct g_part_scheme g_part_pc98_scheme = {
104 sizeof(struct g_part_pc98_table),
105 .gps_entrysz = sizeof(struct g_part_pc98_entry),
106 .gps_minent = NDOSPART,
107 .gps_maxent = NDOSPART,
108 .gps_bootcodesz = SECSIZE,
110 G_PART_SCHEME_DECLARE(g_part_pc98);
113 pc98_parse_type(const char *type, u_char *dp_mid, u_char *dp_sid)
119 if (type[0] == '!') {
120 lt = strtol(type + 1, &endp, 0);
121 if (type[1] == '\0' || *endp != '\0' || lt <= 0 ||
124 /* Make sure the active and bootable flags aren't set. */
125 if (lt & ((PC98_SID_ACTIVE << 8) | PC98_MID_BOOTABLE))
127 *dp_mid = (*dp_mid & PC98_MID_BOOTABLE) | (u_char)lt;
128 *dp_sid = (*dp_sid & PC98_SID_ACTIVE) | (u_char)(lt >> 8);
131 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD);
132 if (!strcasecmp(type, alias)) {
133 *dp_mid = (*dp_mid & PC98_MID_BOOTABLE) | PC98_MID_386BSD;
134 *dp_sid = (*dp_sid & PC98_SID_ACTIVE) | PC98_SID_386BSD;
141 pc98_set_chs(struct g_part_table *table, uint32_t lba, u_short *cylp,
142 u_char *hdp, u_char *secp)
144 uint32_t cyl, hd, sec;
146 sec = lba % table->gpt_sectors + 1;
147 lba /= table->gpt_sectors;
148 hd = lba % table->gpt_heads;
149 lba /= table->gpt_heads;
152 *cylp = htole16(cyl);
158 g_part_pc98_add(struct g_part_table *basetable, struct g_part_entry *baseentry,
159 struct g_part_parms *gpp)
161 struct g_part_pc98_entry *entry;
162 struct g_part_pc98_table *table;
163 uint32_t cyl, start, size;
165 if (gpp->gpp_parms & G_PART_PARM_LABEL)
168 cyl = basetable->gpt_heads * basetable->gpt_sectors;
170 entry = (struct g_part_pc98_entry *)baseentry;
171 table = (struct g_part_pc98_table *)basetable;
173 start = gpp->gpp_start;
174 size = gpp->gpp_size;
178 size = size - cyl + (start % cyl);
179 start = start - (start % cyl) + cyl;
182 size = size - (size % cyl);
186 if (baseentry->gpe_deleted)
187 bzero(&entry->ent, sizeof(entry->ent));
189 entry->ent.dp_mid = entry->ent.dp_sid = 0;
191 KASSERT(baseentry->gpe_start <= start, (__func__));
192 KASSERT(baseentry->gpe_end >= start + size - 1, (__func__));
193 baseentry->gpe_start = start;
194 baseentry->gpe_end = start + size - 1;
195 pc98_set_chs(basetable, baseentry->gpe_start, &entry->ent.dp_scyl,
196 &entry->ent.dp_shd, &entry->ent.dp_ssect);
197 pc98_set_chs(basetable, baseentry->gpe_end, &entry->ent.dp_ecyl,
198 &entry->ent.dp_ehd, &entry->ent.dp_esect);
199 return (pc98_parse_type(gpp->gpp_type, &entry->ent.dp_mid,
200 &entry->ent.dp_sid));
204 g_part_pc98_bootcode(struct g_part_table *basetable, struct g_part_parms *gpp)
206 struct g_part_pc98_table *table;
209 codesz = DOSMAGICOFFSET;
210 table = (struct g_part_pc98_table *)basetable;
211 bzero(table->boot, codesz);
212 codesz = MIN(codesz, gpp->gpp_codesize);
214 bcopy(gpp->gpp_codeptr, table->boot, codesz);
219 g_part_pc98_create(struct g_part_table *basetable, struct g_part_parms *gpp)
221 struct g_provider *pp;
222 struct g_part_pc98_table *table;
225 pp = gpp->gpp_provider;
226 if (pp->sectorsize < SECSIZE || pp->mediasize < 2 * SECSIZE)
228 if (pp->sectorsize > SECSIZE)
231 cyl = basetable->gpt_heads * basetable->gpt_sectors;
233 msize = MIN(pp->mediasize / SECSIZE, UINT32_MAX);
234 basetable->gpt_first = cyl;
235 basetable->gpt_last = msize - (msize % cyl) - 1;
237 table = (struct g_part_pc98_table *)basetable;
238 le16enc(table->boot + DOSMAGICOFFSET, DOSMAGIC);
243 g_part_pc98_destroy(struct g_part_table *basetable, struct g_part_parms *gpp)
246 /* Wipe the first two sectors to clear the partitioning. */
247 basetable->gpt_smhead |= 3;
252 g_part_pc98_dumpconf(struct g_part_table *table,
253 struct g_part_entry *baseentry, struct sbuf *sb, const char *indent)
255 struct g_part_pc98_entry *entry;
256 char name[sizeof(entry->ent.dp_name) + 1];
259 entry = (struct g_part_pc98_entry *)baseentry;
261 /* confxml: scheme information */
265 type = entry->ent.dp_mid + (entry->ent.dp_sid << 8);
266 strncpy(name, entry->ent.dp_name, sizeof(name) - 1);
267 name[sizeof(name) - 1] = '\0';
268 if (indent == NULL) {
269 /* conftxt: libdisk compatibility */
270 sbuf_printf(sb, " xs PC98 xt %u sn %s", type, name);
272 /* confxml: partition entry information */
273 sbuf_printf(sb, "%s<label>%s</label>\n", indent, name);
274 if (entry->ent.dp_mid & PC98_MID_BOOTABLE)
275 sbuf_printf(sb, "%s<attrib>bootable</attrib>\n",
277 if (entry->ent.dp_sid & PC98_SID_ACTIVE)
278 sbuf_printf(sb, "%s<attrib>active</attrib>\n", indent);
279 sbuf_printf(sb, "%s<rawtype>%u</rawtype>\n", indent,
285 g_part_pc98_dumpto(struct g_part_table *table, struct g_part_entry *baseentry)
287 struct g_part_pc98_entry *entry;
289 /* Allow dumping to a FreeBSD partition only. */
290 entry = (struct g_part_pc98_entry *)baseentry;
291 return (((entry->ent.dp_mid & PC98_MID_MASK) == PC98_MID_386BSD &&
292 (entry->ent.dp_sid & PC98_SID_MASK) == PC98_SID_386BSD) ? 1 : 0);
296 g_part_pc98_modify(struct g_part_table *basetable,
297 struct g_part_entry *baseentry, struct g_part_parms *gpp)
299 struct g_part_pc98_entry *entry;
301 if (gpp->gpp_parms & G_PART_PARM_LABEL)
304 entry = (struct g_part_pc98_entry *)baseentry;
305 if (gpp->gpp_parms & G_PART_PARM_TYPE)
306 return (pc98_parse_type(gpp->gpp_type, &entry->ent.dp_mid,
307 &entry->ent.dp_sid));
312 g_part_pc98_resize(struct g_part_table *basetable,
313 struct g_part_entry *baseentry, struct g_part_parms *gpp)
315 struct g_part_pc98_entry *entry;
318 cyl = basetable->gpt_heads * basetable->gpt_sectors;
319 size = gpp->gpp_size;
324 size = size - (size % cyl);
328 entry = (struct g_part_pc98_entry *)baseentry;
329 baseentry->gpe_end = baseentry->gpe_start + size - 1;
330 pc98_set_chs(basetable, baseentry->gpe_end, &entry->ent.dp_ecyl,
331 &entry->ent.dp_ehd, &entry->ent.dp_esect);
337 g_part_pc98_name(struct g_part_table *table, struct g_part_entry *baseentry,
338 char *buf, size_t bufsz)
341 snprintf(buf, bufsz, "s%d", baseentry->gpe_index);
346 g_part_pc98_probe(struct g_part_table *table, struct g_consumer *cp)
348 struct g_provider *pp;
350 int error, index, res, sum;
351 uint16_t magic, ecyl, scyl;
355 /* Sanity-check the provider. */
356 if (pp->sectorsize < SECSIZE || pp->mediasize < 2 * SECSIZE)
358 if (pp->sectorsize > SECSIZE)
361 /* Check that there's a PC98 partition table. */
362 buf = g_read_data(cp, 0L, 2 * SECSIZE, &error);
366 /* We goto out on mismatch. */
369 magic = le16dec(buf + DOSMAGICOFFSET);
370 if (magic != DOSMAGIC)
374 for (index = SECSIZE; index < 2 * SECSIZE; index++)
377 res = G_PART_PROBE_PRI_LOW;
381 for (index = 0; index < NDOSPART; index++) {
382 p = buf + SECSIZE + index * DOSPARTSIZE;
383 if (p[0] == 0 || p[1] == 0) /* !dp_mid || !dp_sid */
385 scyl = le16dec(p + 10);
386 ecyl = le16dec(p + 14);
387 if (scyl == 0 || ecyl == 0)
389 if (p[8] == p[12] && /* dp_ssect == dp_esect */
390 p[9] == p[13] && /* dp_shd == dp_ehd */
395 res = G_PART_PROBE_PRI_HIGH;
403 g_part_pc98_read(struct g_part_table *basetable, struct g_consumer *cp)
405 struct pc98_partition ent;
406 struct g_provider *pp;
407 struct g_part_pc98_table *table;
408 struct g_part_pc98_entry *entry;
416 table = (struct g_part_pc98_table *)basetable;
417 msize = MIN(pp->mediasize / SECSIZE, UINT32_MAX);
419 buf = g_read_data(cp, 0L, 2 * SECSIZE, &error);
423 cyl = basetable->gpt_heads * basetable->gpt_sectors;
425 bcopy(buf, table->boot, sizeof(table->boot));
426 bcopy(buf + SECSIZE, table->table, sizeof(table->table));
428 for (index = NDOSPART - 1; index >= 0; index--) {
429 p = buf + SECSIZE + index * DOSPARTSIZE;
434 ent.dp_ipl_sct = p[4];
435 ent.dp_ipl_head = p[5];
436 ent.dp_ipl_cyl = le16dec(p + 6);
439 ent.dp_scyl = le16dec(p + 10);
440 ent.dp_esect = p[12];
442 ent.dp_ecyl = le16dec(p + 14);
443 bcopy(p + 16, ent.dp_name, sizeof(ent.dp_name));
447 start = ent.dp_scyl * cyl;
448 end = (ent.dp_ecyl + 1) * cyl - 1;
449 entry = (struct g_part_pc98_entry *)g_part_new_entry(basetable,
450 index + 1, start, end);
454 basetable->gpt_entries = NDOSPART;
455 basetable->gpt_first = cyl;
456 basetable->gpt_last = msize - (msize % cyl) - 1;
463 g_part_pc98_setunset(struct g_part_table *table, struct g_part_entry *baseentry,
464 const char *attrib, unsigned int set)
466 struct g_part_entry *iter;
467 struct g_part_pc98_entry *entry;
468 int changed, mid, sid;
471 if (strcasecmp(attrib, "active") == 0)
473 else if (strcasecmp(attrib, "bootable") == 0)
475 if (mid == 0 && sid == 0)
478 LIST_FOREACH(iter, &table->gpt_entry, gpe_entry) {
479 if (iter->gpe_deleted)
481 if (iter != baseentry)
484 entry = (struct g_part_pc98_entry *)iter;
486 if (mid && !(entry->ent.dp_mid & PC98_MID_BOOTABLE)) {
487 entry->ent.dp_mid |= PC98_MID_BOOTABLE;
490 if (sid && !(entry->ent.dp_sid & PC98_SID_ACTIVE)) {
491 entry->ent.dp_sid |= PC98_SID_ACTIVE;
495 if (mid && (entry->ent.dp_mid & PC98_MID_BOOTABLE)) {
496 entry->ent.dp_mid &= ~PC98_MID_BOOTABLE;
499 if (sid && (entry->ent.dp_sid & PC98_SID_ACTIVE)) {
500 entry->ent.dp_sid &= ~PC98_SID_ACTIVE;
504 if (changed && !iter->gpe_created)
505 iter->gpe_modified = 1;
511 g_part_pc98_type(struct g_part_table *basetable, struct g_part_entry *baseentry,
512 char *buf, size_t bufsz)
514 struct g_part_pc98_entry *entry;
517 entry = (struct g_part_pc98_entry *)baseentry;
518 type = (entry->ent.dp_mid & PC98_MID_MASK) |
519 ((entry->ent.dp_sid & PC98_SID_MASK) << 8);
520 if (type == (PC98_MID_386BSD | (PC98_SID_386BSD << 8)))
521 return (g_part_alias_name(G_PART_ALIAS_FREEBSD));
522 snprintf(buf, bufsz, "!%d", type);
527 g_part_pc98_write(struct g_part_table *basetable, struct g_consumer *cp)
529 struct g_part_entry *baseentry;
530 struct g_part_pc98_entry *entry;
531 struct g_part_pc98_table *table;
535 table = (struct g_part_pc98_table *)basetable;
536 baseentry = LIST_FIRST(&basetable->gpt_entry);
537 for (index = 1; index <= basetable->gpt_entries; index++) {
538 p = table->table + (index - 1) * DOSPARTSIZE;
539 entry = (baseentry != NULL && index == baseentry->gpe_index)
540 ? (struct g_part_pc98_entry *)baseentry : NULL;
541 if (entry != NULL && !baseentry->gpe_deleted) {
542 p[0] = entry->ent.dp_mid;
543 p[1] = entry->ent.dp_sid;
544 p[2] = entry->ent.dp_dum1;
545 p[3] = entry->ent.dp_dum2;
546 p[4] = entry->ent.dp_ipl_sct;
547 p[5] = entry->ent.dp_ipl_head;
548 le16enc(p + 6, entry->ent.dp_ipl_cyl);
549 p[8] = entry->ent.dp_ssect;
550 p[9] = entry->ent.dp_shd;
551 le16enc(p + 10, entry->ent.dp_scyl);
552 p[12] = entry->ent.dp_esect;
553 p[13] = entry->ent.dp_ehd;
554 le16enc(p + 14, entry->ent.dp_ecyl);
555 bcopy(entry->ent.dp_name, p + 16,
556 sizeof(entry->ent.dp_name));
558 bzero(p, DOSPARTSIZE);
561 baseentry = LIST_NEXT(baseentry, gpe_entry);
564 error = g_write_data(cp, 0, table->boot, SECSIZE);
566 error = g_write_data(cp, SECSIZE, table->table, SECSIZE);