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("$FreeBSD$");
29
30 #include <sys/param.h>
31 #include <sys/bio.h>
32 #include <sys/endian.h>
33 #include <sys/kernel.h>
34 #include <sys/kobj.h>
35 #include <sys/limits.h>
36 #include <sys/lock.h>
37 #include <sys/malloc.h>
38 #include <sys/mutex.h>
39 #include <sys/queue.h>
40 #include <sys/sbuf.h>
41 #include <sys/systm.h>
42 #include <sys/sysctl.h>
43 #include <sys/vtoc.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_vtoc8, "GEOM partitioning class for SMI VTOC8 disk labels");
51
52 struct g_part_vtoc8_table {
53 struct g_part_table base;
54 struct vtoc8 vtoc;
55 uint32_t secpercyl;
56 };
57
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 *);
76
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),
90 { 0, 0 }
91 };
92
93 static struct g_part_scheme g_part_vtoc8_scheme = {
94 "VTOC8",
95 g_part_vtoc8_methods,
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,
100 };
101 G_PART_SCHEME_DECLARE(g_part_vtoc8);
102
103 static int
vtoc8_parse_type(const char * type,uint16_t * tag)104 vtoc8_parse_type(const char *type, uint16_t *tag)
105 {
106 const char *alias;
107 char *endp;
108 long lt;
109
110 if (type[0] == '!') {
111 lt = strtol(type + 1, &endp, 0);
112 if (type[1] == '\0' || *endp != '\0' || lt <= 0 ||
113 lt >= 65536)
114 return (EINVAL);
115 *tag = (uint16_t)lt;
116 return (0);
117 }
118 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_NANDFS);
119 if (!strcasecmp(type, alias)) {
120 *tag = VTOC_TAG_FREEBSD_NANDFS;
121 return (0);
122 }
123 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP);
124 if (!strcasecmp(type, alias)) {
125 *tag = VTOC_TAG_FREEBSD_SWAP;
126 return (0);
127 }
128 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS);
129 if (!strcasecmp(type, alias)) {
130 *tag = VTOC_TAG_FREEBSD_UFS;
131 return (0);
132 }
133 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM);
134 if (!strcasecmp(type, alias)) {
135 *tag = VTOC_TAG_FREEBSD_VINUM;
136 return (0);
137 }
138 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS);
139 if (!strcasecmp(type, alias)) {
140 *tag = VTOC_TAG_FREEBSD_ZFS;
141 return (0);
142 }
143 return (EINVAL);
144 }
145
146 static int
vtoc8_align(struct g_part_vtoc8_table * table,uint64_t * start,uint64_t * size)147 vtoc8_align(struct g_part_vtoc8_table *table, uint64_t *start, uint64_t *size)
148 {
149
150 if (*size < table->secpercyl)
151 return (EINVAL);
152 if (start != NULL && (*start % table->secpercyl)) {
153 *size += (*start % table->secpercyl) - table->secpercyl;
154 *start -= (*start % table->secpercyl) - table->secpercyl;
155 }
156 if (*size % table->secpercyl)
157 *size -= (*size % table->secpercyl);
158 if (*size < table->secpercyl)
159 return (EINVAL);
160 return (0);
161 }
162
163 static int
g_part_vtoc8_add(struct g_part_table * basetable,struct g_part_entry * entry,struct g_part_parms * gpp)164 g_part_vtoc8_add(struct g_part_table *basetable, struct g_part_entry *entry,
165 struct g_part_parms *gpp)
166 {
167 struct g_part_vtoc8_table *table;
168 int error, index;
169 uint64_t start, size;
170 uint16_t tag;
171
172 if (gpp->gpp_parms & G_PART_PARM_LABEL)
173 return (EINVAL);
174
175 error = vtoc8_parse_type(gpp->gpp_type, &tag);
176 if (error)
177 return (error);
178
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)
184 return (EINVAL);
185
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;
190
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);
196 return (0);
197 }
198
199 static int
g_part_vtoc8_create(struct g_part_table * basetable,struct g_part_parms * gpp)200 g_part_vtoc8_create(struct g_part_table *basetable, struct g_part_parms *gpp)
201 {
202 struct g_provider *pp;
203 struct g_part_entry *entry;
204 struct g_part_vtoc8_table *table;
205 uint64_t msize;
206 uint32_t acyls, ncyls, pcyls;
207
208 pp = gpp->gpp_provider;
209
210 if (pp->sectorsize < sizeof(struct vtoc8))
211 return (ENOSPC);
212 if (pp->sectorsize > sizeof(struct vtoc8))
213 return (ENXIO);
214
215 table = (struct g_part_vtoc8_table *)basetable;
216
217 msize = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX);
218 table->secpercyl = basetable->gpt_sectors * basetable->gpt_heads;
219 pcyls = msize / table->secpercyl;
220 acyls = 2;
221 ncyls = pcyls - acyls;
222 msize = ncyls * table->secpercyl;
223
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);
237
238 basetable->gpt_first = 0;
239 basetable->gpt_last = msize - 1;
240 basetable->gpt_isleaf = 1;
241
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);
247 return (0);
248 }
249
250 static int
g_part_vtoc8_destroy(struct g_part_table * basetable,struct g_part_parms * gpp)251 g_part_vtoc8_destroy(struct g_part_table *basetable, struct g_part_parms *gpp)
252 {
253
254 /* Wipe the first sector to clear the partitioning. */
255 basetable->gpt_smhead |= 1;
256 return (0);
257 }
258
259 static void
g_part_vtoc8_dumpconf(struct g_part_table * basetable,struct g_part_entry * entry,struct sbuf * sb,const char * indent)260 g_part_vtoc8_dumpconf(struct g_part_table *basetable,
261 struct g_part_entry *entry, struct sbuf *sb, const char *indent)
262 {
263 struct g_part_vtoc8_table *table;
264
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));
275 } else {
276 /* confxml: scheme information */
277 }
278 }
279
280 static int
g_part_vtoc8_dumpto(struct g_part_table * basetable,struct g_part_entry * entry)281 g_part_vtoc8_dumpto(struct g_part_table *basetable,
282 struct g_part_entry *entry)
283 {
284 struct g_part_vtoc8_table *table;
285 uint16_t tag;
286
287 /*
288 * Allow dumping to a swap partition or a partition that
289 * has no type.
290 */
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);
295 }
296
297 static int
g_part_vtoc8_modify(struct g_part_table * basetable,struct g_part_entry * entry,struct g_part_parms * gpp)298 g_part_vtoc8_modify(struct g_part_table *basetable,
299 struct g_part_entry *entry, struct g_part_parms *gpp)
300 {
301 struct g_part_vtoc8_table *table;
302 int error;
303 uint16_t tag;
304
305 if (gpp->gpp_parms & G_PART_PARM_LABEL)
306 return (EINVAL);
307
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);
311 if (error)
312 return(error);
313
314 be16enc(&table->vtoc.part[entry->gpe_index - 1].tag, tag);
315 }
316 return (0);
317 }
318
319 static int
vtoc8_set_rawsize(struct g_part_table * basetable,struct g_provider * pp)320 vtoc8_set_rawsize(struct g_part_table *basetable, struct g_provider *pp)
321 {
322 struct g_part_vtoc8_table *table;
323 struct g_part_entry *baseentry;
324 off_t msize;
325 uint32_t acyls, ncyls, pcyls;
326
327 table = (struct g_part_vtoc8_table *)basetable;
328 msize = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX);
329 pcyls = msize / table->secpercyl;
330 if (pcyls > UINT16_MAX)
331 return (ERANGE);
332 acyls = be16dec(&table->vtoc.altcyls);
333 ncyls = pcyls - acyls;
334 msize = ncyls * table->secpercyl;
335 basetable->gpt_last = msize - 1;
336
337 bzero(table->vtoc.ascii, sizeof(table->vtoc.ascii));
338 sprintf(table->vtoc.ascii, "FreeBSD%lldM cyl %u alt %u hd %u sec %u",
339 (long long)(msize / 2048), ncyls, acyls, basetable->gpt_heads,
340 basetable->gpt_sectors);
341 be16enc(&table->vtoc.physcyls, pcyls);
342 be16enc(&table->vtoc.ncyls, ncyls);
343 be32enc(&table->vtoc.map[VTOC_RAW_PART].nblks, msize);
344 if (be32dec(&table->vtoc.sanity) == VTOC_SANITY)
345 be16enc(&table->vtoc.part[VTOC_RAW_PART].tag, VTOC_TAG_BACKUP);
346 LIST_FOREACH(baseentry, &basetable->gpt_entry, gpe_entry) {
347 if (baseentry->gpe_index == VTOC_RAW_PART + 1) {
348 baseentry->gpe_end = basetable->gpt_last;
349 return (0);
350 }
351 }
352 return (ENXIO);
353 }
354
355 static int
g_part_vtoc8_resize(struct g_part_table * basetable,struct g_part_entry * entry,struct g_part_parms * gpp)356 g_part_vtoc8_resize(struct g_part_table *basetable,
357 struct g_part_entry *entry, struct g_part_parms *gpp)
358 {
359 struct g_part_vtoc8_table *table;
360 struct g_provider *pp;
361 uint64_t size;
362
363 if (entry == NULL) {
364 pp = LIST_FIRST(&basetable->gpt_gp->consumer)->provider;
365 return (vtoc8_set_rawsize(basetable, pp));
366 }
367 table = (struct g_part_vtoc8_table *)basetable;
368 size = gpp->gpp_size;
369 if (vtoc8_align(table, NULL, &size) != 0)
370 return (EINVAL);
371 /* XXX: prevent unexpected shrinking. */
372 pp = entry->gpe_pp;
373 if ((g_debugflags & 0x10) == 0 && size < gpp->gpp_size &&
374 pp->mediasize / pp->sectorsize > size)
375 return (EBUSY);
376 entry->gpe_end = entry->gpe_start + size - 1;
377 be32enc(&table->vtoc.map[entry->gpe_index - 1].nblks, size);
378
379 return (0);
380 }
381
382 static const char *
g_part_vtoc8_name(struct g_part_table * table,struct g_part_entry * baseentry,char * buf,size_t bufsz)383 g_part_vtoc8_name(struct g_part_table *table, struct g_part_entry *baseentry,
384 char *buf, size_t bufsz)
385 {
386
387 snprintf(buf, bufsz, "%c", 'a' + baseentry->gpe_index - 1);
388 return (buf);
389 }
390
391 static int
g_part_vtoc8_probe(struct g_part_table * table,struct g_consumer * cp)392 g_part_vtoc8_probe(struct g_part_table *table, struct g_consumer *cp)
393 {
394 struct g_provider *pp;
395 u_char *buf;
396 int error, ofs, res;
397 uint16_t cksum, magic;
398
399 pp = cp->provider;
400
401 /* Sanity-check the provider. */
402 if (pp->sectorsize != sizeof(struct vtoc8))
403 return (ENOSPC);
404
405 /* Check that there's a disklabel. */
406 buf = g_read_data(cp, 0, pp->sectorsize, &error);
407 if (buf == NULL)
408 return (error);
409
410 res = ENXIO; /* Assume mismatch */
411
412 /* Check the magic */
413 magic = be16dec(buf + offsetof(struct vtoc8, magic));
414 if (magic != VTOC_MAGIC)
415 goto out;
416
417 /* Check the sum */
418 cksum = 0;
419 for (ofs = 0; ofs < sizeof(struct vtoc8); ofs += 2)
420 cksum ^= be16dec(buf + ofs);
421 if (cksum != 0)
422 goto out;
423
424 res = G_PART_PROBE_PRI_NORM;
425
426 out:
427 g_free(buf);
428 return (res);
429 }
430
431 static int
g_part_vtoc8_read(struct g_part_table * basetable,struct g_consumer * cp)432 g_part_vtoc8_read(struct g_part_table *basetable, struct g_consumer *cp)
433 {
434 struct g_provider *pp;
435 struct g_part_vtoc8_table *table;
436 struct g_part_entry *entry;
437 u_char *buf;
438 off_t chs, msize;
439 uint64_t offset, size;
440 u_int cyls, heads, sectors;
441 int error, index, withtags;
442 uint16_t tag;
443
444 pp = cp->provider;
445 buf = g_read_data(cp, 0, pp->sectorsize, &error);
446 if (buf == NULL)
447 return (error);
448
449 table = (struct g_part_vtoc8_table *)basetable;
450 bcopy(buf, &table->vtoc, sizeof(table->vtoc));
451 g_free(buf);
452
453 msize = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX);
454 sectors = be16dec(&table->vtoc.nsecs);
455 if (sectors < 1)
456 goto invalid_label;
457 if (sectors != basetable->gpt_sectors && !basetable->gpt_fixgeom) {
458 g_part_geometry_heads(msize, sectors, &chs, &heads);
459 if (chs != 0) {
460 basetable->gpt_sectors = sectors;
461 basetable->gpt_heads = heads;
462 }
463 }
464
465 heads = be16dec(&table->vtoc.nheads);
466 if (heads < 1)
467 goto invalid_label;
468 if (heads != basetable->gpt_heads && !basetable->gpt_fixgeom)
469 basetable->gpt_heads = heads;
470 /*
471 * Except for ATA disks > 32GB, Solaris uses the native geometry
472 * as reported by the target for the labels while da(4) typically
473 * uses a synthetic one so we don't complain too loudly if these
474 * geometries don't match.
475 */
476 if (bootverbose && (sectors != basetable->gpt_sectors ||
477 heads != basetable->gpt_heads))
478 printf("GEOM: %s: geometry does not match VTOC8 label "
479 "(label: %uh,%us GEOM: %uh,%us).\n", pp->name, heads,
480 sectors, basetable->gpt_heads, basetable->gpt_sectors);
481
482 table->secpercyl = heads * sectors;
483 cyls = be16dec(&table->vtoc.ncyls);
484 chs = cyls * table->secpercyl;
485 if (chs < 1 || chs > msize)
486 goto invalid_label;
487
488 basetable->gpt_first = 0;
489 basetable->gpt_last = chs - 1;
490 basetable->gpt_isleaf = 1;
491
492 withtags = (be32dec(&table->vtoc.sanity) == VTOC_SANITY) ? 1 : 0;
493 if (!withtags) {
494 printf("GEOM: %s: adding VTOC8 information.\n", pp->name);
495 be32enc(&table->vtoc.version, VTOC_VERSION);
496 bzero(&table->vtoc.volume, VTOC_VOLUME_LEN);
497 be16enc(&table->vtoc.nparts, VTOC8_NPARTS);
498 bzero(&table->vtoc.part, sizeof(table->vtoc.part));
499 be32enc(&table->vtoc.sanity, VTOC_SANITY);
500 }
501
502 basetable->gpt_entries = be16dec(&table->vtoc.nparts);
503 if (basetable->gpt_entries < g_part_vtoc8_scheme.gps_minent ||
504 basetable->gpt_entries > g_part_vtoc8_scheme.gps_maxent)
505 goto invalid_label;
506
507 for (index = basetable->gpt_entries - 1; index >= 0; index--) {
508 offset = be32dec(&table->vtoc.map[index].cyl) *
509 table->secpercyl;
510 size = be32dec(&table->vtoc.map[index].nblks);
511 if (size == 0)
512 continue;
513 if (withtags)
514 tag = be16dec(&table->vtoc.part[index].tag);
515 else
516 tag = (index == VTOC_RAW_PART)
517 ? VTOC_TAG_BACKUP
518 : VTOC_TAG_UNASSIGNED;
519
520 if (index == VTOC_RAW_PART && tag != VTOC_TAG_BACKUP)
521 continue;
522 if (index != VTOC_RAW_PART && tag == VTOC_TAG_BACKUP)
523 continue;
524 entry = g_part_new_entry(basetable, index + 1, offset,
525 offset + size - 1);
526 if (tag == VTOC_TAG_BACKUP)
527 entry->gpe_internal = 1;
528
529 if (!withtags)
530 be16enc(&table->vtoc.part[index].tag, tag);
531 }
532
533 return (0);
534
535 invalid_label:
536 printf("GEOM: %s: invalid VTOC8 label.\n", pp->name);
537 return (EINVAL);
538 }
539
540 static const char *
g_part_vtoc8_type(struct g_part_table * basetable,struct g_part_entry * entry,char * buf,size_t bufsz)541 g_part_vtoc8_type(struct g_part_table *basetable, struct g_part_entry *entry,
542 char *buf, size_t bufsz)
543 {
544 struct g_part_vtoc8_table *table;
545 uint16_t tag;
546
547 table = (struct g_part_vtoc8_table *)basetable;
548 tag = be16dec(&table->vtoc.part[entry->gpe_index - 1].tag);
549 if (tag == VTOC_TAG_FREEBSD_NANDFS)
550 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_NANDFS));
551 if (tag == VTOC_TAG_FREEBSD_SWAP)
552 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP));
553 if (tag == VTOC_TAG_FREEBSD_UFS)
554 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS));
555 if (tag == VTOC_TAG_FREEBSD_VINUM)
556 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM));
557 if (tag == VTOC_TAG_FREEBSD_ZFS)
558 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS));
559 snprintf(buf, bufsz, "!%d", tag);
560 return (buf);
561 }
562
563 static int
g_part_vtoc8_write(struct g_part_table * basetable,struct g_consumer * cp)564 g_part_vtoc8_write(struct g_part_table *basetable, struct g_consumer *cp)
565 {
566 struct g_provider *pp;
567 struct g_part_entry *entry;
568 struct g_part_vtoc8_table *table;
569 uint16_t sum;
570 u_char *p;
571 int error, index, match, offset;
572
573 pp = cp->provider;
574 table = (struct g_part_vtoc8_table *)basetable;
575 entry = LIST_FIRST(&basetable->gpt_entry);
576 for (index = 0; index < basetable->gpt_entries; index++) {
577 match = (entry != NULL && index == entry->gpe_index - 1)
578 ? 1 : 0;
579 if (match) {
580 if (entry->gpe_deleted) {
581 be16enc(&table->vtoc.part[index].tag, 0);
582 be16enc(&table->vtoc.part[index].flag, 0);
583 be32enc(&table->vtoc.map[index].cyl, 0);
584 be32enc(&table->vtoc.map[index].nblks, 0);
585 }
586 entry = LIST_NEXT(entry, gpe_entry);
587 }
588 }
589
590 /* Calculate checksum. */
591 sum = 0;
592 p = (void *)&table->vtoc;
593 for (offset = 0; offset < sizeof(table->vtoc) - 2; offset += 2)
594 sum ^= be16dec(p + offset);
595 be16enc(&table->vtoc.cksum, sum);
596
597 error = g_write_data(cp, 0, p, pp->sectorsize);
598 return (error);
599 }
600