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/endian.h>
33 #include <sys/kernel.h>
35 #include <sys/limits.h>
37 #include <sys/malloc.h>
38 #include <sys/mutex.h>
39 #include <sys/queue.h>
41 #include <sys/systm.h>
42 #include <sys/sysctl.h>
44 #include <geom/geom.h>
45 #include <geom/geom_int.h>
46 #include <geom/part/g_part.h>
48 #include "g_part_if.h"
50 FEATURE(geom_part_vtoc8, "GEOM partitioning class for SMI VTOC8 disk labels");
52 struct g_part_vtoc8_table {
53 struct g_part_table base;
58 static int g_part_vtoc8_add(struct g_part_table *, struct g_part_entry *,
59 struct g_part_parms *);
60 static int g_part_vtoc8_create(struct g_part_table *, struct g_part_parms *);
61 static int g_part_vtoc8_destroy(struct g_part_table *, struct g_part_parms *);
62 static void g_part_vtoc8_dumpconf(struct g_part_table *,
63 struct g_part_entry *, struct sbuf *, const char *);
64 static int g_part_vtoc8_dumpto(struct g_part_table *, struct g_part_entry *);
65 static int g_part_vtoc8_modify(struct g_part_table *, struct g_part_entry *,
66 struct g_part_parms *);
67 static const char *g_part_vtoc8_name(struct g_part_table *,
68 struct g_part_entry *, char *, size_t);
69 static int g_part_vtoc8_probe(struct g_part_table *, struct g_consumer *);
70 static int g_part_vtoc8_read(struct g_part_table *, struct g_consumer *);
71 static const char *g_part_vtoc8_type(struct g_part_table *,
72 struct g_part_entry *, char *, size_t);
73 static int g_part_vtoc8_write(struct g_part_table *, struct g_consumer *);
74 static int g_part_vtoc8_resize(struct g_part_table *, struct g_part_entry *,
75 struct g_part_parms *);
77 static kobj_method_t g_part_vtoc8_methods[] = {
78 KOBJMETHOD(g_part_add, g_part_vtoc8_add),
79 KOBJMETHOD(g_part_create, g_part_vtoc8_create),
80 KOBJMETHOD(g_part_destroy, g_part_vtoc8_destroy),
81 KOBJMETHOD(g_part_dumpconf, g_part_vtoc8_dumpconf),
82 KOBJMETHOD(g_part_dumpto, g_part_vtoc8_dumpto),
83 KOBJMETHOD(g_part_modify, g_part_vtoc8_modify),
84 KOBJMETHOD(g_part_resize, g_part_vtoc8_resize),
85 KOBJMETHOD(g_part_name, g_part_vtoc8_name),
86 KOBJMETHOD(g_part_probe, g_part_vtoc8_probe),
87 KOBJMETHOD(g_part_read, g_part_vtoc8_read),
88 KOBJMETHOD(g_part_type, g_part_vtoc8_type),
89 KOBJMETHOD(g_part_write, g_part_vtoc8_write),
93 static struct g_part_scheme g_part_vtoc8_scheme = {
96 sizeof(struct g_part_vtoc8_table),
97 .gps_entrysz = sizeof(struct g_part_entry),
98 .gps_minent = VTOC8_NPARTS,
99 .gps_maxent = VTOC8_NPARTS,
101 G_PART_SCHEME_DECLARE(g_part_vtoc8);
104 vtoc8_parse_type(const char *type, uint16_t *tag)
110 if (type[0] == '!') {
111 lt = strtol(type + 1, &endp, 0);
112 if (type[1] == '\0' || *endp != '\0' || lt <= 0 ||
118 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_NANDFS);
119 if (!strcasecmp(type, alias)) {
120 *tag = VTOC_TAG_FREEBSD_NANDFS;
123 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP);
124 if (!strcasecmp(type, alias)) {
125 *tag = VTOC_TAG_FREEBSD_SWAP;
128 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS);
129 if (!strcasecmp(type, alias)) {
130 *tag = VTOC_TAG_FREEBSD_UFS;
133 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM);
134 if (!strcasecmp(type, alias)) {
135 *tag = VTOC_TAG_FREEBSD_VINUM;
138 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS);
139 if (!strcasecmp(type, alias)) {
140 *tag = VTOC_TAG_FREEBSD_ZFS;
147 vtoc8_align(struct g_part_vtoc8_table *table, uint64_t *start, uint64_t *size)
150 if (*size < table->secpercyl)
152 if (start != NULL && (*start % table->secpercyl)) {
153 *size += (*start % table->secpercyl) - table->secpercyl;
154 *start -= (*start % table->secpercyl) - table->secpercyl;
156 if (*size % table->secpercyl)
157 *size -= (*size % table->secpercyl);
158 if (*size < table->secpercyl)
164 g_part_vtoc8_add(struct g_part_table *basetable, struct g_part_entry *entry,
165 struct g_part_parms *gpp)
167 struct g_part_vtoc8_table *table;
169 uint64_t start, size;
172 if (gpp->gpp_parms & G_PART_PARM_LABEL)
175 error = vtoc8_parse_type(gpp->gpp_type, &tag);
179 table = (struct g_part_vtoc8_table *)basetable;
180 index = entry->gpe_index - 1;
181 start = gpp->gpp_start;
182 size = gpp->gpp_size;
183 if (vtoc8_align(table, &start, &size) != 0)
186 KASSERT(entry->gpe_start <= start, (__func__));
187 KASSERT(entry->gpe_end >= start + size - 1, (__func__));
188 entry->gpe_start = start;
189 entry->gpe_end = start + size - 1;
191 be16enc(&table->vtoc.part[index].tag, tag);
192 be16enc(&table->vtoc.part[index].flag, 0);
193 be32enc(&table->vtoc.timestamp[index], 0);
194 be32enc(&table->vtoc.map[index].cyl, start / table->secpercyl);
195 be32enc(&table->vtoc.map[index].nblks, size);
200 g_part_vtoc8_create(struct g_part_table *basetable, struct g_part_parms *gpp)
202 struct g_provider *pp;
203 struct g_part_entry *entry;
204 struct g_part_vtoc8_table *table;
206 uint32_t acyls, ncyls, pcyls;
208 pp = gpp->gpp_provider;
210 if (pp->sectorsize < sizeof(struct vtoc8))
212 if (pp->sectorsize > sizeof(struct vtoc8))
215 table = (struct g_part_vtoc8_table *)basetable;
217 msize = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX);
218 table->secpercyl = basetable->gpt_sectors * basetable->gpt_heads;
219 pcyls = msize / table->secpercyl;
221 ncyls = pcyls - acyls;
222 msize = ncyls * table->secpercyl;
224 sprintf(table->vtoc.ascii, "FreeBSD%lldM cyl %u alt %u hd %u sec %u",
225 (long long)(msize / 2048), ncyls, acyls, basetable->gpt_heads,
226 basetable->gpt_sectors);
227 be32enc(&table->vtoc.version, VTOC_VERSION);
228 be16enc(&table->vtoc.nparts, VTOC8_NPARTS);
229 be32enc(&table->vtoc.sanity, VTOC_SANITY);
230 be16enc(&table->vtoc.rpm, 3600);
231 be16enc(&table->vtoc.physcyls, pcyls);
232 be16enc(&table->vtoc.ncyls, ncyls);
233 be16enc(&table->vtoc.altcyls, acyls);
234 be16enc(&table->vtoc.nheads, basetable->gpt_heads);
235 be16enc(&table->vtoc.nsecs, basetable->gpt_sectors);
236 be16enc(&table->vtoc.magic, VTOC_MAGIC);
238 basetable->gpt_first = 0;
239 basetable->gpt_last = msize - 1;
240 basetable->gpt_isleaf = 1;
242 entry = g_part_new_entry(basetable, VTOC_RAW_PART + 1,
243 basetable->gpt_first, basetable->gpt_last);
244 entry->gpe_internal = 1;
245 be16enc(&table->vtoc.part[VTOC_RAW_PART].tag, VTOC_TAG_BACKUP);
246 be32enc(&table->vtoc.map[VTOC_RAW_PART].nblks, msize);
251 g_part_vtoc8_destroy(struct g_part_table *basetable, struct g_part_parms *gpp)
254 /* Wipe the first sector to clear the partitioning. */
255 basetable->gpt_smhead |= 1;
260 g_part_vtoc8_dumpconf(struct g_part_table *basetable,
261 struct g_part_entry *entry, struct sbuf *sb, const char *indent)
263 struct g_part_vtoc8_table *table;
265 table = (struct g_part_vtoc8_table *)basetable;
266 if (indent == NULL) {
267 /* conftxt: libdisk compatibility */
268 sbuf_printf(sb, " xs SUN sc %u hd %u alt %u",
269 be16dec(&table->vtoc.nsecs), be16dec(&table->vtoc.nheads),
270 be16dec(&table->vtoc.altcyls));
271 } else if (entry != NULL) {
272 /* confxml: partition entry information */
273 sbuf_printf(sb, "%s<rawtype>%u</rawtype>\n", indent,
274 be16dec(&table->vtoc.part[entry->gpe_index - 1].tag));
276 /* confxml: scheme information */
281 g_part_vtoc8_dumpto(struct g_part_table *basetable,
282 struct g_part_entry *entry)
284 struct g_part_vtoc8_table *table;
288 * Allow dumping to a swap partition or a partition that
291 table = (struct g_part_vtoc8_table *)basetable;
292 tag = be16dec(&table->vtoc.part[entry->gpe_index - 1].tag);
293 return ((tag == 0 || tag == VTOC_TAG_FREEBSD_SWAP ||
294 tag == VTOC_TAG_SWAP) ? 1 : 0);
298 g_part_vtoc8_modify(struct g_part_table *basetable,
299 struct g_part_entry *entry, struct g_part_parms *gpp)
301 struct g_part_vtoc8_table *table;
305 if (gpp->gpp_parms & G_PART_PARM_LABEL)
308 table = (struct g_part_vtoc8_table *)basetable;
309 if (gpp->gpp_parms & G_PART_PARM_TYPE) {
310 error = vtoc8_parse_type(gpp->gpp_type, &tag);
314 be16enc(&table->vtoc.part[entry->gpe_index - 1].tag, tag);
320 g_part_vtoc8_resize(struct g_part_table *basetable,
321 struct g_part_entry *entry, struct g_part_parms *gpp)
323 struct g_part_vtoc8_table *table;
324 struct g_provider *pp;
327 table = (struct g_part_vtoc8_table *)basetable;
328 size = gpp->gpp_size;
329 if (vtoc8_align(table, NULL, &size) != 0)
331 /* XXX: prevent unexpected shrinking. */
333 if ((g_debugflags & 0x10) == 0 && size < gpp->gpp_size &&
334 pp->mediasize / pp->sectorsize > size)
336 entry->gpe_end = entry->gpe_start + size - 1;
337 be32enc(&table->vtoc.map[entry->gpe_index - 1].nblks, size);
343 g_part_vtoc8_name(struct g_part_table *table, struct g_part_entry *baseentry,
344 char *buf, size_t bufsz)
347 snprintf(buf, bufsz, "%c", 'a' + baseentry->gpe_index - 1);
352 g_part_vtoc8_probe(struct g_part_table *table, struct g_consumer *cp)
354 struct g_provider *pp;
357 uint16_t cksum, magic;
361 /* Sanity-check the provider. */
362 if (pp->sectorsize != sizeof(struct vtoc8))
365 /* Check that there's a disklabel. */
366 buf = g_read_data(cp, 0, pp->sectorsize, &error);
370 res = ENXIO; /* Assume mismatch */
372 /* Check the magic */
373 magic = be16dec(buf + offsetof(struct vtoc8, magic));
374 if (magic != VTOC_MAGIC)
379 for (ofs = 0; ofs < sizeof(struct vtoc8); ofs += 2)
380 cksum ^= be16dec(buf + ofs);
384 res = G_PART_PROBE_PRI_NORM;
392 g_part_vtoc8_read(struct g_part_table *basetable, struct g_consumer *cp)
394 struct g_provider *pp;
395 struct g_part_vtoc8_table *table;
396 struct g_part_entry *entry;
399 uint64_t offset, size;
400 u_int cyls, heads, sectors;
401 int error, index, withtags;
405 buf = g_read_data(cp, 0, pp->sectorsize, &error);
409 table = (struct g_part_vtoc8_table *)basetable;
410 bcopy(buf, &table->vtoc, sizeof(table->vtoc));
413 msize = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX);
414 sectors = be16dec(&table->vtoc.nsecs);
417 if (sectors != basetable->gpt_sectors && !basetable->gpt_fixgeom) {
418 g_part_geometry_heads(msize, sectors, &chs, &heads);
420 basetable->gpt_sectors = sectors;
421 basetable->gpt_heads = heads;
425 heads = be16dec(&table->vtoc.nheads);
428 if (heads != basetable->gpt_heads && !basetable->gpt_fixgeom)
429 basetable->gpt_heads = heads;
431 * Except for ATA disks > 32GB, Solaris uses the native geometry
432 * as reported by the target for the labels while da(4) typically
433 * uses a synthetic one so we don't complain too loudly if these
434 * geometries don't match.
436 if (bootverbose && (sectors != basetable->gpt_sectors ||
437 heads != basetable->gpt_heads))
438 printf("GEOM: %s: geometry does not match VTOC8 label "
439 "(label: %uh,%us GEOM: %uh,%us).\n", pp->name, heads,
440 sectors, basetable->gpt_heads, basetable->gpt_sectors);
442 table->secpercyl = heads * sectors;
443 cyls = be16dec(&table->vtoc.ncyls);
444 chs = cyls * table->secpercyl;
445 if (chs < 1 || chs > msize)
448 basetable->gpt_first = 0;
449 basetable->gpt_last = chs - 1;
450 basetable->gpt_isleaf = 1;
452 withtags = (be32dec(&table->vtoc.sanity) == VTOC_SANITY) ? 1 : 0;
454 printf("GEOM: %s: adding VTOC8 information.\n", pp->name);
455 be32enc(&table->vtoc.version, VTOC_VERSION);
456 bzero(&table->vtoc.volume, VTOC_VOLUME_LEN);
457 be16enc(&table->vtoc.nparts, VTOC8_NPARTS);
458 bzero(&table->vtoc.part, sizeof(table->vtoc.part));
459 be32enc(&table->vtoc.sanity, VTOC_SANITY);
462 basetable->gpt_entries = be16dec(&table->vtoc.nparts);
463 if (basetable->gpt_entries < g_part_vtoc8_scheme.gps_minent ||
464 basetable->gpt_entries > g_part_vtoc8_scheme.gps_maxent)
467 for (index = basetable->gpt_entries - 1; index >= 0; index--) {
468 offset = be32dec(&table->vtoc.map[index].cyl) *
470 size = be32dec(&table->vtoc.map[index].nblks);
474 tag = be16dec(&table->vtoc.part[index].tag);
476 tag = (index == VTOC_RAW_PART)
478 : VTOC_TAG_UNASSIGNED;
480 if (index == VTOC_RAW_PART && tag != VTOC_TAG_BACKUP)
482 if (index != VTOC_RAW_PART && tag == VTOC_TAG_BACKUP)
484 entry = g_part_new_entry(basetable, index + 1, offset,
486 if (tag == VTOC_TAG_BACKUP)
487 entry->gpe_internal = 1;
490 be16enc(&table->vtoc.part[index].tag, tag);
496 printf("GEOM: %s: invalid VTOC8 label.\n", pp->name);
501 g_part_vtoc8_type(struct g_part_table *basetable, struct g_part_entry *entry,
502 char *buf, size_t bufsz)
504 struct g_part_vtoc8_table *table;
507 table = (struct g_part_vtoc8_table *)basetable;
508 tag = be16dec(&table->vtoc.part[entry->gpe_index - 1].tag);
509 if (tag == VTOC_TAG_FREEBSD_NANDFS)
510 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_NANDFS));
511 if (tag == VTOC_TAG_FREEBSD_SWAP)
512 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP));
513 if (tag == VTOC_TAG_FREEBSD_UFS)
514 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS));
515 if (tag == VTOC_TAG_FREEBSD_VINUM)
516 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM));
517 if (tag == VTOC_TAG_FREEBSD_ZFS)
518 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS));
519 snprintf(buf, bufsz, "!%d", tag);
524 g_part_vtoc8_write(struct g_part_table *basetable, struct g_consumer *cp)
526 struct g_provider *pp;
527 struct g_part_entry *entry;
528 struct g_part_vtoc8_table *table;
531 int error, index, match, offset;
534 table = (struct g_part_vtoc8_table *)basetable;
535 entry = LIST_FIRST(&basetable->gpt_entry);
536 for (index = 0; index < basetable->gpt_entries; index++) {
537 match = (entry != NULL && index == entry->gpe_index - 1)
540 if (entry->gpe_deleted) {
541 be16enc(&table->vtoc.part[index].tag, 0);
542 be16enc(&table->vtoc.part[index].flag, 0);
543 be32enc(&table->vtoc.map[index].cyl, 0);
544 be32enc(&table->vtoc.map[index].nblks, 0);
546 entry = LIST_NEXT(entry, gpe_entry);
550 /* Calculate checksum. */
552 p = (void *)&table->vtoc;
553 for (offset = 0; offset < sizeof(table->vtoc) - 2; offset += 2)
554 sum ^= be16dec(p + offset);
555 be16enc(&table->vtoc.cksum, sum);
557 error = g_write_data(cp, 0, p, pp->sectorsize);