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/part/g_part.h>
47 #include "g_part_if.h"
49 FEATURE(geom_part_vtoc8, "GEOM partitioning class for SMI VTOC8 disk labels");
51 struct g_part_vtoc8_table {
52 struct g_part_table base;
57 static int g_part_vtoc8_add(struct g_part_table *, struct g_part_entry *,
58 struct g_part_parms *);
59 static int g_part_vtoc8_create(struct g_part_table *, struct g_part_parms *);
60 static int g_part_vtoc8_destroy(struct g_part_table *, struct g_part_parms *);
61 static void g_part_vtoc8_dumpconf(struct g_part_table *,
62 struct g_part_entry *, struct sbuf *, const char *);
63 static int g_part_vtoc8_dumpto(struct g_part_table *, struct g_part_entry *);
64 static int g_part_vtoc8_modify(struct g_part_table *, struct g_part_entry *,
65 struct g_part_parms *);
66 static const char *g_part_vtoc8_name(struct g_part_table *,
67 struct g_part_entry *, char *, size_t);
68 static int g_part_vtoc8_probe(struct g_part_table *, struct g_consumer *);
69 static int g_part_vtoc8_read(struct g_part_table *, struct g_consumer *);
70 static const char *g_part_vtoc8_type(struct g_part_table *,
71 struct g_part_entry *, char *, size_t);
72 static int g_part_vtoc8_write(struct g_part_table *, struct g_consumer *);
73 static int g_part_vtoc8_resize(struct g_part_table *, struct g_part_entry *,
74 struct g_part_parms *);
76 static kobj_method_t g_part_vtoc8_methods[] = {
77 KOBJMETHOD(g_part_add, g_part_vtoc8_add),
78 KOBJMETHOD(g_part_create, g_part_vtoc8_create),
79 KOBJMETHOD(g_part_destroy, g_part_vtoc8_destroy),
80 KOBJMETHOD(g_part_dumpconf, g_part_vtoc8_dumpconf),
81 KOBJMETHOD(g_part_dumpto, g_part_vtoc8_dumpto),
82 KOBJMETHOD(g_part_modify, g_part_vtoc8_modify),
83 KOBJMETHOD(g_part_resize, g_part_vtoc8_resize),
84 KOBJMETHOD(g_part_name, g_part_vtoc8_name),
85 KOBJMETHOD(g_part_probe, g_part_vtoc8_probe),
86 KOBJMETHOD(g_part_read, g_part_vtoc8_read),
87 KOBJMETHOD(g_part_type, g_part_vtoc8_type),
88 KOBJMETHOD(g_part_write, g_part_vtoc8_write),
92 static struct g_part_scheme g_part_vtoc8_scheme = {
95 sizeof(struct g_part_vtoc8_table),
96 .gps_entrysz = sizeof(struct g_part_entry),
97 .gps_minent = VTOC8_NPARTS,
98 .gps_maxent = VTOC8_NPARTS,
100 G_PART_SCHEME_DECLARE(g_part_vtoc8);
103 vtoc8_parse_type(const char *type, uint16_t *tag)
109 if (type[0] == '!') {
110 lt = strtol(type + 1, &endp, 0);
111 if (type[1] == '\0' || *endp != '\0' || lt <= 0 ||
117 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP);
118 if (!strcasecmp(type, alias)) {
119 *tag = VTOC_TAG_FREEBSD_SWAP;
122 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS);
123 if (!strcasecmp(type, alias)) {
124 *tag = VTOC_TAG_FREEBSD_UFS;
127 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM);
128 if (!strcasecmp(type, alias)) {
129 *tag = VTOC_TAG_FREEBSD_VINUM;
132 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS);
133 if (!strcasecmp(type, alias)) {
134 *tag = VTOC_TAG_FREEBSD_ZFS;
141 g_part_vtoc8_add(struct g_part_table *basetable, struct g_part_entry *entry,
142 struct g_part_parms *gpp)
144 struct g_part_vtoc8_table *table;
146 uint64_t start, size;
149 if (gpp->gpp_parms & G_PART_PARM_LABEL)
152 error = vtoc8_parse_type(gpp->gpp_type, &tag);
156 table = (struct g_part_vtoc8_table *)basetable;
157 index = entry->gpe_index - 1;
159 start = gpp->gpp_start;
160 size = gpp->gpp_size;
161 if (start % table->secpercyl) {
162 size = size - table->secpercyl + (start % table->secpercyl);
163 start = start - (start % table->secpercyl) + table->secpercyl;
165 if (size % table->secpercyl)
166 size = size - (size % table->secpercyl);
167 if (size < table->secpercyl)
170 KASSERT(entry->gpe_start <= start, (__func__));
171 KASSERT(entry->gpe_end >= start + size - 1, (__func__));
172 entry->gpe_start = start;
173 entry->gpe_end = start + size - 1;
175 be16enc(&table->vtoc.part[index].tag, tag);
176 be16enc(&table->vtoc.part[index].flag, 0);
177 be32enc(&table->vtoc.timestamp[index], 0);
178 be32enc(&table->vtoc.map[index].cyl, start / table->secpercyl);
179 be32enc(&table->vtoc.map[index].nblks, size);
184 g_part_vtoc8_create(struct g_part_table *basetable, struct g_part_parms *gpp)
186 struct g_provider *pp;
187 struct g_part_entry *entry;
188 struct g_part_vtoc8_table *table;
190 uint32_t acyls, ncyls, pcyls;
192 pp = gpp->gpp_provider;
194 if (pp->sectorsize < sizeof(struct vtoc8))
196 if (pp->sectorsize > sizeof(struct vtoc8))
199 table = (struct g_part_vtoc8_table *)basetable;
201 msize = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX);
202 table->secpercyl = basetable->gpt_sectors * basetable->gpt_heads;
203 pcyls = msize / table->secpercyl;
205 ncyls = pcyls - acyls;
206 msize = ncyls * table->secpercyl;
208 sprintf(table->vtoc.ascii, "FreeBSD%lldM cyl %u alt %u hd %u sec %u",
209 (long long)(msize / 2048), ncyls, acyls, basetable->gpt_heads,
210 basetable->gpt_sectors);
211 be32enc(&table->vtoc.version, VTOC_VERSION);
212 be16enc(&table->vtoc.nparts, VTOC8_NPARTS);
213 be32enc(&table->vtoc.sanity, VTOC_SANITY);
214 be16enc(&table->vtoc.rpm, 3600);
215 be16enc(&table->vtoc.physcyls, pcyls);
216 be16enc(&table->vtoc.ncyls, ncyls);
217 be16enc(&table->vtoc.altcyls, acyls);
218 be16enc(&table->vtoc.nheads, basetable->gpt_heads);
219 be16enc(&table->vtoc.nsecs, basetable->gpt_sectors);
220 be16enc(&table->vtoc.magic, VTOC_MAGIC);
222 basetable->gpt_first = 0;
223 basetable->gpt_last = msize - 1;
224 basetable->gpt_isleaf = 1;
226 entry = g_part_new_entry(basetable, VTOC_RAW_PART + 1,
227 basetable->gpt_first, basetable->gpt_last);
228 entry->gpe_internal = 1;
229 be16enc(&table->vtoc.part[VTOC_RAW_PART].tag, VTOC_TAG_BACKUP);
230 be32enc(&table->vtoc.map[VTOC_RAW_PART].nblks, msize);
235 g_part_vtoc8_destroy(struct g_part_table *basetable, struct g_part_parms *gpp)
238 /* Wipe the first sector to clear the partitioning. */
239 basetable->gpt_smhead |= 1;
244 g_part_vtoc8_dumpconf(struct g_part_table *basetable,
245 struct g_part_entry *entry, struct sbuf *sb, const char *indent)
247 struct g_part_vtoc8_table *table;
249 table = (struct g_part_vtoc8_table *)basetable;
250 if (indent == NULL) {
251 /* conftxt: libdisk compatibility */
252 sbuf_printf(sb, " xs SUN sc %u hd %u alt %u",
253 be16dec(&table->vtoc.nsecs), be16dec(&table->vtoc.nheads),
254 be16dec(&table->vtoc.altcyls));
255 } else if (entry != NULL) {
256 /* confxml: partition entry information */
257 sbuf_printf(sb, "%s<rawtype>%u</rawtype>\n", indent,
258 be16dec(&table->vtoc.part[entry->gpe_index - 1].tag));
260 /* confxml: scheme information */
265 g_part_vtoc8_dumpto(struct g_part_table *basetable,
266 struct g_part_entry *entry)
268 struct g_part_vtoc8_table *table;
272 * Allow dumping to a swap partition or a partition that
275 table = (struct g_part_vtoc8_table *)basetable;
276 tag = be16dec(&table->vtoc.part[entry->gpe_index - 1].tag);
277 return ((tag == 0 || tag == VTOC_TAG_FREEBSD_SWAP) ? 1 : 0);
281 g_part_vtoc8_modify(struct g_part_table *basetable,
282 struct g_part_entry *entry, struct g_part_parms *gpp)
284 struct g_part_vtoc8_table *table;
288 if (gpp->gpp_parms & G_PART_PARM_LABEL)
291 table = (struct g_part_vtoc8_table *)basetable;
292 if (gpp->gpp_parms & G_PART_PARM_TYPE) {
293 error = vtoc8_parse_type(gpp->gpp_type, &tag);
297 be16enc(&table->vtoc.part[entry->gpe_index - 1].tag, tag);
303 g_part_vtoc8_resize(struct g_part_table *basetable,
304 struct g_part_entry *entry, struct g_part_parms *gpp)
306 struct g_part_vtoc8_table *table;
309 table = (struct g_part_vtoc8_table *)basetable;
310 size = gpp->gpp_size;
311 if (size % table->secpercyl)
312 size = size - (size % table->secpercyl);
313 if (size < table->secpercyl)
316 entry->gpe_end = entry->gpe_start + size - 1;
317 be32enc(&table->vtoc.map[entry->gpe_index - 1].nblks, size);
323 g_part_vtoc8_name(struct g_part_table *table, struct g_part_entry *baseentry,
324 char *buf, size_t bufsz)
327 snprintf(buf, bufsz, "%c", 'a' + baseentry->gpe_index - 1);
332 g_part_vtoc8_probe(struct g_part_table *table, struct g_consumer *cp)
334 struct g_provider *pp;
337 uint16_t cksum, magic;
341 /* Sanity-check the provider. */
342 if (pp->sectorsize != sizeof(struct vtoc8))
345 /* Check that there's a disklabel. */
346 buf = g_read_data(cp, 0, pp->sectorsize, &error);
350 res = ENXIO; /* Assume mismatch */
352 /* Check the magic */
353 magic = be16dec(buf + offsetof(struct vtoc8, magic));
354 if (magic != VTOC_MAGIC)
359 for (ofs = 0; ofs < sizeof(struct vtoc8); ofs += 2)
360 cksum ^= be16dec(buf + ofs);
364 res = G_PART_PROBE_PRI_NORM;
372 g_part_vtoc8_read(struct g_part_table *basetable, struct g_consumer *cp)
374 struct g_provider *pp;
375 struct g_part_vtoc8_table *table;
376 struct g_part_entry *entry;
379 uint64_t offset, size;
380 u_int cyls, heads, sectors;
381 int error, index, withtags;
385 buf = g_read_data(cp, 0, pp->sectorsize, &error);
389 table = (struct g_part_vtoc8_table *)basetable;
390 bcopy(buf, &table->vtoc, sizeof(table->vtoc));
393 msize = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX);
394 sectors = be16dec(&table->vtoc.nsecs);
397 if (sectors != basetable->gpt_sectors && !basetable->gpt_fixgeom) {
398 g_part_geometry_heads(msize, sectors, &chs, &heads);
400 basetable->gpt_sectors = sectors;
401 basetable->gpt_heads = heads;
405 heads = be16dec(&table->vtoc.nheads);
408 if (heads != basetable->gpt_heads && !basetable->gpt_fixgeom)
409 basetable->gpt_heads = heads;
411 * Except for ATA disks > 32GB, Solaris uses the native geometry
412 * as reported by the target for the labels while da(4) typically
413 * uses a synthetic one so we don't complain too loudly if these
414 * geometries don't match.
416 if (bootverbose && (sectors != basetable->gpt_sectors ||
417 heads != basetable->gpt_heads))
418 printf("GEOM: %s: geometry does not match VTOC8 label "
419 "(label: %uh,%us GEOM: %uh,%us).\n", pp->name, heads,
420 sectors, basetable->gpt_heads, basetable->gpt_sectors);
422 table->secpercyl = heads * sectors;
423 cyls = be16dec(&table->vtoc.ncyls);
424 chs = cyls * table->secpercyl;
425 if (chs < 1 || chs > msize)
428 basetable->gpt_first = 0;
429 basetable->gpt_last = chs - 1;
430 basetable->gpt_isleaf = 1;
432 withtags = (be32dec(&table->vtoc.sanity) == VTOC_SANITY) ? 1 : 0;
434 printf("GEOM: %s: adding VTOC8 information.\n", pp->name);
435 be32enc(&table->vtoc.version, VTOC_VERSION);
436 bzero(&table->vtoc.volume, VTOC_VOLUME_LEN);
437 be16enc(&table->vtoc.nparts, VTOC8_NPARTS);
438 bzero(&table->vtoc.part, sizeof(table->vtoc.part));
439 be32enc(&table->vtoc.sanity, VTOC_SANITY);
442 basetable->gpt_entries = be16dec(&table->vtoc.nparts);
443 if (basetable->gpt_entries < g_part_vtoc8_scheme.gps_minent ||
444 basetable->gpt_entries > g_part_vtoc8_scheme.gps_maxent)
447 for (index = basetable->gpt_entries - 1; index >= 0; index--) {
448 offset = be32dec(&table->vtoc.map[index].cyl) *
450 size = be32dec(&table->vtoc.map[index].nblks);
454 tag = be16dec(&table->vtoc.part[index].tag);
456 tag = (index == VTOC_RAW_PART)
458 : VTOC_TAG_UNASSIGNED;
460 if (index == VTOC_RAW_PART && tag != VTOC_TAG_BACKUP)
462 if (index != VTOC_RAW_PART && tag == VTOC_TAG_BACKUP)
464 entry = g_part_new_entry(basetable, index + 1, offset,
466 if (tag == VTOC_TAG_BACKUP)
467 entry->gpe_internal = 1;
470 be16enc(&table->vtoc.part[index].tag, tag);
476 printf("GEOM: %s: invalid VTOC8 label.\n", pp->name);
481 g_part_vtoc8_type(struct g_part_table *basetable, struct g_part_entry *entry,
482 char *buf, size_t bufsz)
484 struct g_part_vtoc8_table *table;
487 table = (struct g_part_vtoc8_table *)basetable;
488 tag = be16dec(&table->vtoc.part[entry->gpe_index - 1].tag);
489 if (tag == VTOC_TAG_FREEBSD_SWAP)
490 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP));
491 if (tag == VTOC_TAG_FREEBSD_UFS)
492 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS));
493 if (tag == VTOC_TAG_FREEBSD_VINUM)
494 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM));
495 if (tag == VTOC_TAG_FREEBSD_ZFS)
496 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS));
497 snprintf(buf, bufsz, "!%d", tag);
502 g_part_vtoc8_write(struct g_part_table *basetable, struct g_consumer *cp)
504 struct g_provider *pp;
505 struct g_part_entry *entry;
506 struct g_part_vtoc8_table *table;
509 int error, index, match, offset;
512 table = (struct g_part_vtoc8_table *)basetable;
513 entry = LIST_FIRST(&basetable->gpt_entry);
514 for (index = 0; index < basetable->gpt_entries; index++) {
515 match = (entry != NULL && index == entry->gpe_index - 1)
518 if (entry->gpe_deleted) {
519 be16enc(&table->vtoc.part[index].tag, 0);
520 be16enc(&table->vtoc.part[index].flag, 0);
521 be32enc(&table->vtoc.map[index].cyl, 0);
522 be32enc(&table->vtoc.map[index].nblks, 0);
524 entry = LIST_NEXT(entry, gpe_entry);
528 /* Calculate checksum. */
530 p = (void *)&table->vtoc;
531 for (offset = 0; offset < sizeof(table->vtoc) - 2; offset += 2)
532 sum ^= be16dec(p + offset);
533 be16enc(&table->vtoc.cksum, sum);
535 error = g_write_data(cp, 0, p, pp->sectorsize);