1 /*-
2 * Copyright (c) 2002, 2005-2007, 2011 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/diskmbr.h>
33 #include <sys/endian.h>
34 #include <sys/gpt.h>
35 #include <sys/kernel.h>
36 #include <sys/kobj.h>
37 #include <sys/limits.h>
38 #include <sys/lock.h>
39 #include <sys/malloc.h>
40 #include <sys/mutex.h>
41 #include <sys/queue.h>
42 #include <sys/sbuf.h>
43 #include <sys/systm.h>
44 #include <sys/sysctl.h>
45 #include <sys/uuid.h>
46 #include <geom/geom.h>
47 #include <geom/geom_int.h>
48 #include <geom/part/g_part.h>
49
50 #include "g_part_if.h"
51
52 FEATURE(geom_part_gpt, "GEOM partitioning class for GPT partitions support");
53
54 CTASSERT(offsetof(struct gpt_hdr, padding) == 92);
55 CTASSERT(sizeof(struct gpt_ent) == 128);
56
57 #define EQUUID(a,b) (memcmp(a, b, sizeof(struct uuid)) == 0)
58
59 #define MBRSIZE 512
60
61 enum gpt_elt {
62 GPT_ELT_PRIHDR,
63 GPT_ELT_PRITBL,
64 GPT_ELT_SECHDR,
65 GPT_ELT_SECTBL,
66 GPT_ELT_COUNT
67 };
68
69 enum gpt_state {
70 GPT_STATE_UNKNOWN, /* Not determined. */
71 GPT_STATE_MISSING, /* No signature found. */
72 GPT_STATE_CORRUPT, /* Checksum mismatch. */
73 GPT_STATE_INVALID, /* Nonconformant/invalid. */
74 GPT_STATE_OK /* Perfectly fine. */
75 };
76
77 struct g_part_gpt_table {
78 struct g_part_table base;
79 u_char mbr[MBRSIZE];
80 struct gpt_hdr *hdr;
81 quad_t lba[GPT_ELT_COUNT];
82 enum gpt_state state[GPT_ELT_COUNT];
83 int bootcamp;
84 };
85
86 struct g_part_gpt_entry {
87 struct g_part_entry base;
88 struct gpt_ent ent;
89 };
90
91 static void g_gpt_printf_utf16(struct sbuf *, uint16_t *, size_t);
92 static void g_gpt_utf8_to_utf16(const uint8_t *, uint16_t *, size_t);
93 static void g_gpt_set_defaults(struct g_part_table *, struct g_provider *);
94
95 static int g_part_gpt_add(struct g_part_table *, struct g_part_entry *,
96 struct g_part_parms *);
97 static int g_part_gpt_bootcode(struct g_part_table *, struct g_part_parms *);
98 static int g_part_gpt_create(struct g_part_table *, struct g_part_parms *);
99 static int g_part_gpt_destroy(struct g_part_table *, struct g_part_parms *);
100 static void g_part_gpt_dumpconf(struct g_part_table *, struct g_part_entry *,
101 struct sbuf *, const char *);
102 static int g_part_gpt_dumpto(struct g_part_table *, struct g_part_entry *);
103 static int g_part_gpt_modify(struct g_part_table *, struct g_part_entry *,
104 struct g_part_parms *);
105 static const char *g_part_gpt_name(struct g_part_table *, struct g_part_entry *,
106 char *, size_t);
107 static int g_part_gpt_probe(struct g_part_table *, struct g_consumer *);
108 static int g_part_gpt_read(struct g_part_table *, struct g_consumer *);
109 static int g_part_gpt_setunset(struct g_part_table *table,
110 struct g_part_entry *baseentry, const char *attrib, unsigned int set);
111 static const char *g_part_gpt_type(struct g_part_table *, struct g_part_entry *,
112 char *, size_t);
113 static int g_part_gpt_write(struct g_part_table *, struct g_consumer *);
114 static int g_part_gpt_resize(struct g_part_table *, struct g_part_entry *,
115 struct g_part_parms *);
116 static int g_part_gpt_recover(struct g_part_table *);
117
118 static kobj_method_t g_part_gpt_methods[] = {
119 KOBJMETHOD(g_part_add, g_part_gpt_add),
120 KOBJMETHOD(g_part_bootcode, g_part_gpt_bootcode),
121 KOBJMETHOD(g_part_create, g_part_gpt_create),
122 KOBJMETHOD(g_part_destroy, g_part_gpt_destroy),
123 KOBJMETHOD(g_part_dumpconf, g_part_gpt_dumpconf),
124 KOBJMETHOD(g_part_dumpto, g_part_gpt_dumpto),
125 KOBJMETHOD(g_part_modify, g_part_gpt_modify),
126 KOBJMETHOD(g_part_resize, g_part_gpt_resize),
127 KOBJMETHOD(g_part_name, g_part_gpt_name),
128 KOBJMETHOD(g_part_probe, g_part_gpt_probe),
129 KOBJMETHOD(g_part_read, g_part_gpt_read),
130 KOBJMETHOD(g_part_recover, g_part_gpt_recover),
131 KOBJMETHOD(g_part_setunset, g_part_gpt_setunset),
132 KOBJMETHOD(g_part_type, g_part_gpt_type),
133 KOBJMETHOD(g_part_write, g_part_gpt_write),
134 { 0, 0 }
135 };
136
137 static struct g_part_scheme g_part_gpt_scheme = {
138 "GPT",
139 g_part_gpt_methods,
140 sizeof(struct g_part_gpt_table),
141 .gps_entrysz = sizeof(struct g_part_gpt_entry),
142 .gps_minent = 128,
143 .gps_maxent = 4096,
144 .gps_bootcodesz = MBRSIZE,
145 };
146 G_PART_SCHEME_DECLARE(g_part_gpt);
147
148 static struct uuid gpt_uuid_apple_boot = GPT_ENT_TYPE_APPLE_BOOT;
149 static struct uuid gpt_uuid_apple_core_storage =
150 GPT_ENT_TYPE_APPLE_CORE_STORAGE;
151 static struct uuid gpt_uuid_apple_hfs = GPT_ENT_TYPE_APPLE_HFS;
152 static struct uuid gpt_uuid_apple_label = GPT_ENT_TYPE_APPLE_LABEL;
153 static struct uuid gpt_uuid_apple_raid = GPT_ENT_TYPE_APPLE_RAID;
154 static struct uuid gpt_uuid_apple_raid_offline = GPT_ENT_TYPE_APPLE_RAID_OFFLINE;
155 static struct uuid gpt_uuid_apple_tv_recovery = GPT_ENT_TYPE_APPLE_TV_RECOVERY;
156 static struct uuid gpt_uuid_apple_ufs = GPT_ENT_TYPE_APPLE_UFS;
157 static struct uuid gpt_uuid_bios_boot = GPT_ENT_TYPE_BIOS_BOOT;
158 static struct uuid gpt_uuid_chromeos_firmware = GPT_ENT_TYPE_CHROMEOS_FIRMWARE;
159 static struct uuid gpt_uuid_chromeos_kernel = GPT_ENT_TYPE_CHROMEOS_KERNEL;
160 static struct uuid gpt_uuid_chromeos_reserved = GPT_ENT_TYPE_CHROMEOS_RESERVED;
161 static struct uuid gpt_uuid_chromeos_root = GPT_ENT_TYPE_CHROMEOS_ROOT;
162 static struct uuid gpt_uuid_dfbsd_ccd = GPT_ENT_TYPE_DRAGONFLY_CCD;
163 static struct uuid gpt_uuid_dfbsd_hammer = GPT_ENT_TYPE_DRAGONFLY_HAMMER;
164 static struct uuid gpt_uuid_dfbsd_hammer2 = GPT_ENT_TYPE_DRAGONFLY_HAMMER2;
165 static struct uuid gpt_uuid_dfbsd_label32 = GPT_ENT_TYPE_DRAGONFLY_LABEL32;
166 static struct uuid gpt_uuid_dfbsd_label64 = GPT_ENT_TYPE_DRAGONFLY_LABEL64;
167 static struct uuid gpt_uuid_dfbsd_legacy = GPT_ENT_TYPE_DRAGONFLY_LEGACY;
168 static struct uuid gpt_uuid_dfbsd_swap = GPT_ENT_TYPE_DRAGONFLY_SWAP;
169 static struct uuid gpt_uuid_dfbsd_ufs1 = GPT_ENT_TYPE_DRAGONFLY_UFS1;
170 static struct uuid gpt_uuid_dfbsd_vinum = GPT_ENT_TYPE_DRAGONFLY_VINUM;
171 static struct uuid gpt_uuid_efi = GPT_ENT_TYPE_EFI;
172 static struct uuid gpt_uuid_freebsd = GPT_ENT_TYPE_FREEBSD;
173 static struct uuid gpt_uuid_freebsd_boot = GPT_ENT_TYPE_FREEBSD_BOOT;
174 static struct uuid gpt_uuid_freebsd_nandfs = GPT_ENT_TYPE_FREEBSD_NANDFS;
175 static struct uuid gpt_uuid_freebsd_swap = GPT_ENT_TYPE_FREEBSD_SWAP;
176 static struct uuid gpt_uuid_freebsd_ufs = GPT_ENT_TYPE_FREEBSD_UFS;
177 static struct uuid gpt_uuid_freebsd_vinum = GPT_ENT_TYPE_FREEBSD_VINUM;
178 static struct uuid gpt_uuid_freebsd_zfs = GPT_ENT_TYPE_FREEBSD_ZFS;
179 static struct uuid gpt_uuid_linux_data = GPT_ENT_TYPE_LINUX_DATA;
180 static struct uuid gpt_uuid_linux_lvm = GPT_ENT_TYPE_LINUX_LVM;
181 static struct uuid gpt_uuid_linux_raid = GPT_ENT_TYPE_LINUX_RAID;
182 static struct uuid gpt_uuid_linux_swap = GPT_ENT_TYPE_LINUX_SWAP;
183 static struct uuid gpt_uuid_mbr = GPT_ENT_TYPE_MBR;
184 static struct uuid gpt_uuid_ms_basic_data = GPT_ENT_TYPE_MS_BASIC_DATA;
185 static struct uuid gpt_uuid_ms_ldm_data = GPT_ENT_TYPE_MS_LDM_DATA;
186 static struct uuid gpt_uuid_ms_ldm_metadata = GPT_ENT_TYPE_MS_LDM_METADATA;
187 static struct uuid gpt_uuid_ms_recovery = GPT_ENT_TYPE_MS_RECOVERY;
188 static struct uuid gpt_uuid_ms_reserved = GPT_ENT_TYPE_MS_RESERVED;
189 static struct uuid gpt_uuid_ms_spaces = GPT_ENT_TYPE_MS_SPACES;
190 static struct uuid gpt_uuid_netbsd_ccd = GPT_ENT_TYPE_NETBSD_CCD;
191 static struct uuid gpt_uuid_netbsd_cgd = GPT_ENT_TYPE_NETBSD_CGD;
192 static struct uuid gpt_uuid_netbsd_ffs = GPT_ENT_TYPE_NETBSD_FFS;
193 static struct uuid gpt_uuid_netbsd_lfs = GPT_ENT_TYPE_NETBSD_LFS;
194 static struct uuid gpt_uuid_netbsd_raid = GPT_ENT_TYPE_NETBSD_RAID;
195 static struct uuid gpt_uuid_netbsd_swap = GPT_ENT_TYPE_NETBSD_SWAP;
196 static struct uuid gpt_uuid_openbsd_data = GPT_ENT_TYPE_OPENBSD_DATA;
197 static struct uuid gpt_uuid_prep_boot = GPT_ENT_TYPE_PREP_BOOT;
198 static struct uuid gpt_uuid_unused = GPT_ENT_TYPE_UNUSED;
199 static struct uuid gpt_uuid_vmfs = GPT_ENT_TYPE_VMFS;
200 static struct uuid gpt_uuid_vmkdiag = GPT_ENT_TYPE_VMKDIAG;
201 static struct uuid gpt_uuid_vmreserved = GPT_ENT_TYPE_VMRESERVED;
202 static struct uuid gpt_uuid_vmvsanhdr = GPT_ENT_TYPE_VMVSANHDR;
203
204 static struct g_part_uuid_alias {
205 struct uuid *uuid;
206 int alias;
207 int mbrtype;
208 } gpt_uuid_alias_match[] = {
209 { &gpt_uuid_apple_boot, G_PART_ALIAS_APPLE_BOOT, 0xab },
210 { &gpt_uuid_apple_core_storage, G_PART_ALIAS_APPLE_CORE_STORAGE, 0 },
211 { &gpt_uuid_apple_hfs, G_PART_ALIAS_APPLE_HFS, 0xaf },
212 { &gpt_uuid_apple_label, G_PART_ALIAS_APPLE_LABEL, 0 },
213 { &gpt_uuid_apple_raid, G_PART_ALIAS_APPLE_RAID, 0 },
214 { &gpt_uuid_apple_raid_offline, G_PART_ALIAS_APPLE_RAID_OFFLINE, 0 },
215 { &gpt_uuid_apple_tv_recovery, G_PART_ALIAS_APPLE_TV_RECOVERY, 0 },
216 { &gpt_uuid_apple_ufs, G_PART_ALIAS_APPLE_UFS, 0 },
217 { &gpt_uuid_bios_boot, G_PART_ALIAS_BIOS_BOOT, 0 },
218 { &gpt_uuid_chromeos_firmware, G_PART_ALIAS_CHROMEOS_FIRMWARE, 0 },
219 { &gpt_uuid_chromeos_kernel, G_PART_ALIAS_CHROMEOS_KERNEL, 0 },
220 { &gpt_uuid_chromeos_reserved, G_PART_ALIAS_CHROMEOS_RESERVED, 0 },
221 { &gpt_uuid_chromeos_root, G_PART_ALIAS_CHROMEOS_ROOT, 0 },
222 { &gpt_uuid_dfbsd_ccd, G_PART_ALIAS_DFBSD_CCD, 0 },
223 { &gpt_uuid_dfbsd_hammer, G_PART_ALIAS_DFBSD_HAMMER, 0 },
224 { &gpt_uuid_dfbsd_hammer2, G_PART_ALIAS_DFBSD_HAMMER2, 0 },
225 { &gpt_uuid_dfbsd_label32, G_PART_ALIAS_DFBSD, 0xa5 },
226 { &gpt_uuid_dfbsd_label64, G_PART_ALIAS_DFBSD64, 0xa5 },
227 { &gpt_uuid_dfbsd_legacy, G_PART_ALIAS_DFBSD_LEGACY, 0 },
228 { &gpt_uuid_dfbsd_swap, G_PART_ALIAS_DFBSD_SWAP, 0 },
229 { &gpt_uuid_dfbsd_ufs1, G_PART_ALIAS_DFBSD_UFS, 0 },
230 { &gpt_uuid_dfbsd_vinum, G_PART_ALIAS_DFBSD_VINUM, 0 },
231 { &gpt_uuid_efi, G_PART_ALIAS_EFI, 0xee },
232 { &gpt_uuid_freebsd, G_PART_ALIAS_FREEBSD, 0xa5 },
233 { &gpt_uuid_freebsd_boot, G_PART_ALIAS_FREEBSD_BOOT, 0 },
234 { &gpt_uuid_freebsd_nandfs, G_PART_ALIAS_FREEBSD_NANDFS, 0 },
235 { &gpt_uuid_freebsd_swap, G_PART_ALIAS_FREEBSD_SWAP, 0 },
236 { &gpt_uuid_freebsd_ufs, G_PART_ALIAS_FREEBSD_UFS, 0 },
237 { &gpt_uuid_freebsd_vinum, G_PART_ALIAS_FREEBSD_VINUM, 0 },
238 { &gpt_uuid_freebsd_zfs, G_PART_ALIAS_FREEBSD_ZFS, 0 },
239 { &gpt_uuid_linux_data, G_PART_ALIAS_LINUX_DATA, 0x0b },
240 { &gpt_uuid_linux_lvm, G_PART_ALIAS_LINUX_LVM, 0 },
241 { &gpt_uuid_linux_raid, G_PART_ALIAS_LINUX_RAID, 0 },
242 { &gpt_uuid_linux_swap, G_PART_ALIAS_LINUX_SWAP, 0 },
243 { &gpt_uuid_mbr, G_PART_ALIAS_MBR, 0 },
244 { &gpt_uuid_ms_basic_data, G_PART_ALIAS_MS_BASIC_DATA, 0x0b },
245 { &gpt_uuid_ms_ldm_data, G_PART_ALIAS_MS_LDM_DATA, 0 },
246 { &gpt_uuid_ms_ldm_metadata, G_PART_ALIAS_MS_LDM_METADATA, 0 },
247 { &gpt_uuid_ms_recovery, G_PART_ALIAS_MS_RECOVERY, 0 },
248 { &gpt_uuid_ms_reserved, G_PART_ALIAS_MS_RESERVED, 0 },
249 { &gpt_uuid_ms_spaces, G_PART_ALIAS_MS_SPACES, 0 },
250 { &gpt_uuid_netbsd_ccd, G_PART_ALIAS_NETBSD_CCD, 0 },
251 { &gpt_uuid_netbsd_cgd, G_PART_ALIAS_NETBSD_CGD, 0 },
252 { &gpt_uuid_netbsd_ffs, G_PART_ALIAS_NETBSD_FFS, 0 },
253 { &gpt_uuid_netbsd_lfs, G_PART_ALIAS_NETBSD_LFS, 0 },
254 { &gpt_uuid_netbsd_raid, G_PART_ALIAS_NETBSD_RAID, 0 },
255 { &gpt_uuid_netbsd_swap, G_PART_ALIAS_NETBSD_SWAP, 0 },
256 { &gpt_uuid_openbsd_data, G_PART_ALIAS_OPENBSD_DATA, 0 },
257 { &gpt_uuid_prep_boot, G_PART_ALIAS_PREP_BOOT, 0x41 },
258 { &gpt_uuid_vmfs, G_PART_ALIAS_VMFS, 0 },
259 { &gpt_uuid_vmkdiag, G_PART_ALIAS_VMKDIAG, 0 },
260 { &gpt_uuid_vmreserved, G_PART_ALIAS_VMRESERVED, 0 },
261 { &gpt_uuid_vmvsanhdr, G_PART_ALIAS_VMVSANHDR, 0 },
262 { NULL, 0, 0 }
263 };
264
265 static int
gpt_write_mbr_entry(u_char * mbr,int idx,int typ,quad_t start,quad_t end)266 gpt_write_mbr_entry(u_char *mbr, int idx, int typ, quad_t start,
267 quad_t end)
268 {
269
270 if (typ == 0 || start > UINT32_MAX || end > UINT32_MAX)
271 return (EINVAL);
272
273 mbr += DOSPARTOFF + idx * DOSPARTSIZE;
274 mbr[0] = 0;
275 if (start == 1) {
276 /*
277 * Treat the PMBR partition specially to maximize
278 * interoperability with BIOSes.
279 */
280 mbr[1] = mbr[3] = 0;
281 mbr[2] = 2;
282 } else
283 mbr[1] = mbr[2] = mbr[3] = 0xff;
284 mbr[4] = typ;
285 mbr[5] = mbr[6] = mbr[7] = 0xff;
286 le32enc(mbr + 8, (uint32_t)start);
287 le32enc(mbr + 12, (uint32_t)(end - start + 1));
288 return (0);
289 }
290
291 static int
gpt_map_type(struct uuid * t)292 gpt_map_type(struct uuid *t)
293 {
294 struct g_part_uuid_alias *uap;
295
296 for (uap = &gpt_uuid_alias_match[0]; uap->uuid; uap++) {
297 if (EQUUID(t, uap->uuid))
298 return (uap->mbrtype);
299 }
300 return (0);
301 }
302
303 static void
gpt_create_pmbr(struct g_part_gpt_table * table,struct g_provider * pp)304 gpt_create_pmbr(struct g_part_gpt_table *table, struct g_provider *pp)
305 {
306
307 bzero(table->mbr + DOSPARTOFF, DOSPARTSIZE * NDOSPART);
308 gpt_write_mbr_entry(table->mbr, 0, 0xee, 1,
309 MIN(pp->mediasize / pp->sectorsize - 1, UINT32_MAX));
310 le16enc(table->mbr + DOSMAGICOFFSET, DOSMAGIC);
311 }
312
313 /*
314 * Under Boot Camp the PMBR partition (type 0xEE) doesn't cover the
315 * whole disk anymore. Rather, it covers the GPT table and the EFI
316 * system partition only. This way the HFS+ partition and any FAT
317 * partitions can be added to the MBR without creating an overlap.
318 */
319 static int
gpt_is_bootcamp(struct g_part_gpt_table * table,const char * provname)320 gpt_is_bootcamp(struct g_part_gpt_table *table, const char *provname)
321 {
322 uint8_t *p;
323
324 p = table->mbr + DOSPARTOFF;
325 if (p[4] != 0xee || le32dec(p + 8) != 1)
326 return (0);
327
328 p += DOSPARTSIZE;
329 if (p[4] != 0xaf)
330 return (0);
331
332 printf("GEOM: %s: enabling Boot Camp\n", provname);
333 return (1);
334 }
335
336 static void
gpt_update_bootcamp(struct g_part_table * basetable,struct g_provider * pp)337 gpt_update_bootcamp(struct g_part_table *basetable, struct g_provider *pp)
338 {
339 struct g_part_entry *baseentry;
340 struct g_part_gpt_entry *entry;
341 struct g_part_gpt_table *table;
342 int bootable, error, index, slices, typ;
343
344 table = (struct g_part_gpt_table *)basetable;
345
346 bootable = -1;
347 for (index = 0; index < NDOSPART; index++) {
348 if (table->mbr[DOSPARTOFF + DOSPARTSIZE * index])
349 bootable = index;
350 }
351
352 bzero(table->mbr + DOSPARTOFF, DOSPARTSIZE * NDOSPART);
353 slices = 0;
354 LIST_FOREACH(baseentry, &basetable->gpt_entry, gpe_entry) {
355 if (baseentry->gpe_deleted)
356 continue;
357 index = baseentry->gpe_index - 1;
358 if (index >= NDOSPART)
359 continue;
360
361 entry = (struct g_part_gpt_entry *)baseentry;
362
363 switch (index) {
364 case 0: /* This must be the EFI system partition. */
365 if (!EQUUID(&entry->ent.ent_type, &gpt_uuid_efi))
366 goto disable;
367 error = gpt_write_mbr_entry(table->mbr, index, 0xee,
368 1ull, entry->ent.ent_lba_end);
369 break;
370 case 1: /* This must be the HFS+ partition. */
371 if (!EQUUID(&entry->ent.ent_type, &gpt_uuid_apple_hfs))
372 goto disable;
373 error = gpt_write_mbr_entry(table->mbr, index, 0xaf,
374 entry->ent.ent_lba_start, entry->ent.ent_lba_end);
375 break;
376 default:
377 typ = gpt_map_type(&entry->ent.ent_type);
378 error = gpt_write_mbr_entry(table->mbr, index, typ,
379 entry->ent.ent_lba_start, entry->ent.ent_lba_end);
380 break;
381 }
382 if (error)
383 continue;
384
385 if (index == bootable)
386 table->mbr[DOSPARTOFF + DOSPARTSIZE * index] = 0x80;
387 slices |= 1 << index;
388 }
389 if ((slices & 3) == 3)
390 return;
391
392 disable:
393 table->bootcamp = 0;
394 gpt_create_pmbr(table, pp);
395 }
396
397 static struct gpt_hdr *
gpt_read_hdr(struct g_part_gpt_table * table,struct g_consumer * cp,enum gpt_elt elt)398 gpt_read_hdr(struct g_part_gpt_table *table, struct g_consumer *cp,
399 enum gpt_elt elt)
400 {
401 struct gpt_hdr *buf, *hdr;
402 struct g_provider *pp;
403 quad_t lba, last;
404 int error;
405 uint32_t crc, sz;
406
407 pp = cp->provider;
408 last = (pp->mediasize / pp->sectorsize) - 1;
409 table->state[elt] = GPT_STATE_MISSING;
410 /*
411 * If the primary header is valid look for secondary
412 * header in AlternateLBA, otherwise in the last medium's LBA.
413 */
414 if (elt == GPT_ELT_SECHDR) {
415 if (table->state[GPT_ELT_PRIHDR] != GPT_STATE_OK)
416 table->lba[elt] = last;
417 } else
418 table->lba[elt] = 1;
419 buf = g_read_data(cp, table->lba[elt] * pp->sectorsize, pp->sectorsize,
420 &error);
421 if (buf == NULL)
422 return (NULL);
423 hdr = NULL;
424 if (memcmp(buf->hdr_sig, GPT_HDR_SIG, sizeof(buf->hdr_sig)) != 0)
425 goto fail;
426
427 table->state[elt] = GPT_STATE_CORRUPT;
428 sz = le32toh(buf->hdr_size);
429 if (sz < 92 || sz > pp->sectorsize)
430 goto fail;
431
432 hdr = g_malloc(sz, M_WAITOK | M_ZERO);
433 bcopy(buf, hdr, sz);
434 hdr->hdr_size = sz;
435
436 crc = le32toh(buf->hdr_crc_self);
437 buf->hdr_crc_self = 0;
438 if (crc32(buf, sz) != crc)
439 goto fail;
440 hdr->hdr_crc_self = crc;
441
442 table->state[elt] = GPT_STATE_INVALID;
443 hdr->hdr_revision = le32toh(buf->hdr_revision);
444 if (hdr->hdr_revision < GPT_HDR_REVISION)
445 goto fail;
446 hdr->hdr_lba_self = le64toh(buf->hdr_lba_self);
447 if (hdr->hdr_lba_self != table->lba[elt])
448 goto fail;
449 hdr->hdr_lba_alt = le64toh(buf->hdr_lba_alt);
450 if (hdr->hdr_lba_alt == hdr->hdr_lba_self ||
451 hdr->hdr_lba_alt > last)
452 goto fail;
453
454 /* Check the managed area. */
455 hdr->hdr_lba_start = le64toh(buf->hdr_lba_start);
456 if (hdr->hdr_lba_start < 2 || hdr->hdr_lba_start >= last)
457 goto fail;
458 hdr->hdr_lba_end = le64toh(buf->hdr_lba_end);
459 if (hdr->hdr_lba_end < hdr->hdr_lba_start || hdr->hdr_lba_end >= last)
460 goto fail;
461
462 /* Check the table location and size of the table. */
463 hdr->hdr_entries = le32toh(buf->hdr_entries);
464 hdr->hdr_entsz = le32toh(buf->hdr_entsz);
465 if (hdr->hdr_entries == 0 || hdr->hdr_entsz < 128 ||
466 (hdr->hdr_entsz & 7) != 0)
467 goto fail;
468 hdr->hdr_lba_table = le64toh(buf->hdr_lba_table);
469 if (hdr->hdr_lba_table < 2 || hdr->hdr_lba_table >= last)
470 goto fail;
471 if (hdr->hdr_lba_table >= hdr->hdr_lba_start &&
472 hdr->hdr_lba_table <= hdr->hdr_lba_end)
473 goto fail;
474 lba = hdr->hdr_lba_table +
475 (hdr->hdr_entries * hdr->hdr_entsz + pp->sectorsize - 1) /
476 pp->sectorsize - 1;
477 if (lba >= last)
478 goto fail;
479 if (lba >= hdr->hdr_lba_start && lba <= hdr->hdr_lba_end)
480 goto fail;
481
482 table->state[elt] = GPT_STATE_OK;
483 le_uuid_dec(&buf->hdr_uuid, &hdr->hdr_uuid);
484 hdr->hdr_crc_table = le32toh(buf->hdr_crc_table);
485
486 /* save LBA for secondary header */
487 if (elt == GPT_ELT_PRIHDR)
488 table->lba[GPT_ELT_SECHDR] = hdr->hdr_lba_alt;
489
490 g_free(buf);
491 return (hdr);
492
493 fail:
494 if (hdr != NULL)
495 g_free(hdr);
496 g_free(buf);
497 return (NULL);
498 }
499
500 static struct gpt_ent *
gpt_read_tbl(struct g_part_gpt_table * table,struct g_consumer * cp,enum gpt_elt elt,struct gpt_hdr * hdr)501 gpt_read_tbl(struct g_part_gpt_table *table, struct g_consumer *cp,
502 enum gpt_elt elt, struct gpt_hdr *hdr)
503 {
504 struct g_provider *pp;
505 struct gpt_ent *ent, *tbl;
506 char *buf, *p;
507 unsigned int idx, sectors, tblsz, size;
508 int error;
509
510 if (hdr == NULL)
511 return (NULL);
512
513 pp = cp->provider;
514 table->lba[elt] = hdr->hdr_lba_table;
515
516 table->state[elt] = GPT_STATE_MISSING;
517 tblsz = hdr->hdr_entries * hdr->hdr_entsz;
518 sectors = (tblsz + pp->sectorsize - 1) / pp->sectorsize;
519 buf = g_malloc(sectors * pp->sectorsize, M_WAITOK | M_ZERO);
520 for (idx = 0; idx < sectors; idx += MAXPHYS / pp->sectorsize) {
521 size = (sectors - idx > MAXPHYS / pp->sectorsize) ? MAXPHYS:
522 (sectors - idx) * pp->sectorsize;
523 p = g_read_data(cp, (table->lba[elt] + idx) * pp->sectorsize,
524 size, &error);
525 if (p == NULL) {
526 g_free(buf);
527 return (NULL);
528 }
529 bcopy(p, buf + idx * pp->sectorsize, size);
530 g_free(p);
531 }
532 table->state[elt] = GPT_STATE_CORRUPT;
533 if (crc32(buf, tblsz) != hdr->hdr_crc_table) {
534 g_free(buf);
535 return (NULL);
536 }
537
538 table->state[elt] = GPT_STATE_OK;
539 tbl = g_malloc(hdr->hdr_entries * sizeof(struct gpt_ent),
540 M_WAITOK | M_ZERO);
541
542 for (idx = 0, ent = tbl, p = buf;
543 idx < hdr->hdr_entries;
544 idx++, ent++, p += hdr->hdr_entsz) {
545 le_uuid_dec(p, &ent->ent_type);
546 le_uuid_dec(p + 16, &ent->ent_uuid);
547 ent->ent_lba_start = le64dec(p + 32);
548 ent->ent_lba_end = le64dec(p + 40);
549 ent->ent_attr = le64dec(p + 48);
550 /* Keep UTF-16 in little-endian. */
551 bcopy(p + 56, ent->ent_name, sizeof(ent->ent_name));
552 }
553
554 g_free(buf);
555 return (tbl);
556 }
557
558 static int
gpt_matched_hdrs(struct gpt_hdr * pri,struct gpt_hdr * sec)559 gpt_matched_hdrs(struct gpt_hdr *pri, struct gpt_hdr *sec)
560 {
561
562 if (pri == NULL || sec == NULL)
563 return (0);
564
565 if (!EQUUID(&pri->hdr_uuid, &sec->hdr_uuid))
566 return (0);
567 return ((pri->hdr_revision == sec->hdr_revision &&
568 pri->hdr_size == sec->hdr_size &&
569 pri->hdr_lba_start == sec->hdr_lba_start &&
570 pri->hdr_lba_end == sec->hdr_lba_end &&
571 pri->hdr_entries == sec->hdr_entries &&
572 pri->hdr_entsz == sec->hdr_entsz &&
573 pri->hdr_crc_table == sec->hdr_crc_table) ? 1 : 0);
574 }
575
576 static int
gpt_parse_type(const char * type,struct uuid * uuid)577 gpt_parse_type(const char *type, struct uuid *uuid)
578 {
579 struct uuid tmp;
580 const char *alias;
581 int error;
582 struct g_part_uuid_alias *uap;
583
584 if (type[0] == '!') {
585 error = parse_uuid(type + 1, &tmp);
586 if (error)
587 return (error);
588 if (EQUUID(&tmp, &gpt_uuid_unused))
589 return (EINVAL);
590 *uuid = tmp;
591 return (0);
592 }
593 for (uap = &gpt_uuid_alias_match[0]; uap->uuid; uap++) {
594 alias = g_part_alias_name(uap->alias);
595 if (!strcasecmp(type, alias)) {
596 *uuid = *uap->uuid;
597 return (0);
598 }
599 }
600 return (EINVAL);
601 }
602
603 static int
g_part_gpt_add(struct g_part_table * basetable,struct g_part_entry * baseentry,struct g_part_parms * gpp)604 g_part_gpt_add(struct g_part_table *basetable, struct g_part_entry *baseentry,
605 struct g_part_parms *gpp)
606 {
607 struct g_part_gpt_entry *entry;
608 int error;
609
610 entry = (struct g_part_gpt_entry *)baseentry;
611 error = gpt_parse_type(gpp->gpp_type, &entry->ent.ent_type);
612 if (error)
613 return (error);
614 kern_uuidgen(&entry->ent.ent_uuid, 1);
615 entry->ent.ent_lba_start = baseentry->gpe_start;
616 entry->ent.ent_lba_end = baseentry->gpe_end;
617 if (baseentry->gpe_deleted) {
618 entry->ent.ent_attr = 0;
619 bzero(entry->ent.ent_name, sizeof(entry->ent.ent_name));
620 }
621 if (gpp->gpp_parms & G_PART_PARM_LABEL)
622 g_gpt_utf8_to_utf16(gpp->gpp_label, entry->ent.ent_name,
623 sizeof(entry->ent.ent_name) /
624 sizeof(entry->ent.ent_name[0]));
625 return (0);
626 }
627
628 static int
g_part_gpt_bootcode(struct g_part_table * basetable,struct g_part_parms * gpp)629 g_part_gpt_bootcode(struct g_part_table *basetable, struct g_part_parms *gpp)
630 {
631 struct g_part_gpt_table *table;
632 size_t codesz;
633
634 codesz = DOSPARTOFF;
635 table = (struct g_part_gpt_table *)basetable;
636 bzero(table->mbr, codesz);
637 codesz = MIN(codesz, gpp->gpp_codesize);
638 if (codesz > 0)
639 bcopy(gpp->gpp_codeptr, table->mbr, codesz);
640 return (0);
641 }
642
643 static int
g_part_gpt_create(struct g_part_table * basetable,struct g_part_parms * gpp)644 g_part_gpt_create(struct g_part_table *basetable, struct g_part_parms *gpp)
645 {
646 struct g_provider *pp;
647 struct g_part_gpt_table *table;
648 size_t tblsz;
649
650 /* We don't nest, which means that our depth should be 0. */
651 if (basetable->gpt_depth != 0)
652 return (ENXIO);
653
654 table = (struct g_part_gpt_table *)basetable;
655 pp = gpp->gpp_provider;
656 tblsz = (basetable->gpt_entries * sizeof(struct gpt_ent) +
657 pp->sectorsize - 1) / pp->sectorsize;
658 if (pp->sectorsize < MBRSIZE ||
659 pp->mediasize < (3 + 2 * tblsz + basetable->gpt_entries) *
660 pp->sectorsize)
661 return (ENOSPC);
662
663 gpt_create_pmbr(table, pp);
664
665 /* Allocate space for the header */
666 table->hdr = g_malloc(sizeof(struct gpt_hdr), M_WAITOK | M_ZERO);
667
668 bcopy(GPT_HDR_SIG, table->hdr->hdr_sig, sizeof(table->hdr->hdr_sig));
669 table->hdr->hdr_revision = GPT_HDR_REVISION;
670 table->hdr->hdr_size = offsetof(struct gpt_hdr, padding);
671 kern_uuidgen(&table->hdr->hdr_uuid, 1);
672 table->hdr->hdr_entries = basetable->gpt_entries;
673 table->hdr->hdr_entsz = sizeof(struct gpt_ent);
674
675 g_gpt_set_defaults(basetable, pp);
676 return (0);
677 }
678
679 static int
g_part_gpt_destroy(struct g_part_table * basetable,struct g_part_parms * gpp)680 g_part_gpt_destroy(struct g_part_table *basetable, struct g_part_parms *gpp)
681 {
682 struct g_part_gpt_table *table;
683 struct g_provider *pp;
684
685 table = (struct g_part_gpt_table *)basetable;
686 pp = LIST_FIRST(&basetable->gpt_gp->consumer)->provider;
687 g_free(table->hdr);
688 table->hdr = NULL;
689
690 /*
691 * Wipe the first 2 sectors to clear the partitioning. Wipe the last
692 * sector only if it has valid secondary header.
693 */
694 basetable->gpt_smhead |= 3;
695 if (table->state[GPT_ELT_SECHDR] == GPT_STATE_OK &&
696 table->lba[GPT_ELT_SECHDR] == pp->mediasize / pp->sectorsize - 1)
697 basetable->gpt_smtail |= 1;
698 return (0);
699 }
700
701 static void
g_part_gpt_dumpconf(struct g_part_table * table,struct g_part_entry * baseentry,struct sbuf * sb,const char * indent)702 g_part_gpt_dumpconf(struct g_part_table *table, struct g_part_entry *baseentry,
703 struct sbuf *sb, const char *indent)
704 {
705 struct g_part_gpt_entry *entry;
706
707 entry = (struct g_part_gpt_entry *)baseentry;
708 if (indent == NULL) {
709 /* conftxt: libdisk compatibility */
710 sbuf_printf(sb, " xs GPT xt ");
711 sbuf_printf_uuid(sb, &entry->ent.ent_type);
712 } else if (entry != NULL) {
713 /* confxml: partition entry information */
714 sbuf_printf(sb, "%s<label>", indent);
715 g_gpt_printf_utf16(sb, entry->ent.ent_name,
716 sizeof(entry->ent.ent_name) >> 1);
717 sbuf_printf(sb, "</label>\n");
718 if (entry->ent.ent_attr & GPT_ENT_ATTR_BOOTME)
719 sbuf_printf(sb, "%s<attrib>bootme</attrib>\n", indent);
720 if (entry->ent.ent_attr & GPT_ENT_ATTR_BOOTONCE) {
721 sbuf_printf(sb, "%s<attrib>bootonce</attrib>\n",
722 indent);
723 }
724 if (entry->ent.ent_attr & GPT_ENT_ATTR_BOOTFAILED) {
725 sbuf_printf(sb, "%s<attrib>bootfailed</attrib>\n",
726 indent);
727 }
728 sbuf_printf(sb, "%s<rawtype>", indent);
729 sbuf_printf_uuid(sb, &entry->ent.ent_type);
730 sbuf_printf(sb, "</rawtype>\n");
731 sbuf_printf(sb, "%s<rawuuid>", indent);
732 sbuf_printf_uuid(sb, &entry->ent.ent_uuid);
733 sbuf_printf(sb, "</rawuuid>\n");
734 } else {
735 /* confxml: scheme information */
736 }
737 }
738
739 static int
g_part_gpt_dumpto(struct g_part_table * table,struct g_part_entry * baseentry)740 g_part_gpt_dumpto(struct g_part_table *table, struct g_part_entry *baseentry)
741 {
742 struct g_part_gpt_entry *entry;
743
744 entry = (struct g_part_gpt_entry *)baseentry;
745 return ((EQUUID(&entry->ent.ent_type, &gpt_uuid_freebsd_swap) ||
746 EQUUID(&entry->ent.ent_type, &gpt_uuid_linux_swap) ||
747 EQUUID(&entry->ent.ent_type, &gpt_uuid_dfbsd_swap)) ? 1 : 0);
748 }
749
750 static int
g_part_gpt_modify(struct g_part_table * basetable,struct g_part_entry * baseentry,struct g_part_parms * gpp)751 g_part_gpt_modify(struct g_part_table *basetable,
752 struct g_part_entry *baseentry, struct g_part_parms *gpp)
753 {
754 struct g_part_gpt_entry *entry;
755 int error;
756
757 entry = (struct g_part_gpt_entry *)baseentry;
758 if (gpp->gpp_parms & G_PART_PARM_TYPE) {
759 error = gpt_parse_type(gpp->gpp_type, &entry->ent.ent_type);
760 if (error)
761 return (error);
762 }
763 if (gpp->gpp_parms & G_PART_PARM_LABEL)
764 g_gpt_utf8_to_utf16(gpp->gpp_label, entry->ent.ent_name,
765 sizeof(entry->ent.ent_name) /
766 sizeof(entry->ent.ent_name[0]));
767 return (0);
768 }
769
770 static int
g_part_gpt_resize(struct g_part_table * basetable,struct g_part_entry * baseentry,struct g_part_parms * gpp)771 g_part_gpt_resize(struct g_part_table *basetable,
772 struct g_part_entry *baseentry, struct g_part_parms *gpp)
773 {
774 struct g_part_gpt_entry *entry;
775
776 if (baseentry == NULL)
777 return (g_part_gpt_recover(basetable));
778
779 entry = (struct g_part_gpt_entry *)baseentry;
780 baseentry->gpe_end = baseentry->gpe_start + gpp->gpp_size - 1;
781 entry->ent.ent_lba_end = baseentry->gpe_end;
782
783 return (0);
784 }
785
786 static const char *
g_part_gpt_name(struct g_part_table * table,struct g_part_entry * baseentry,char * buf,size_t bufsz)787 g_part_gpt_name(struct g_part_table *table, struct g_part_entry *baseentry,
788 char *buf, size_t bufsz)
789 {
790 struct g_part_gpt_entry *entry;
791 char c;
792
793 entry = (struct g_part_gpt_entry *)baseentry;
794 c = (EQUUID(&entry->ent.ent_type, &gpt_uuid_freebsd)) ? 's' : 'p';
795 snprintf(buf, bufsz, "%c%d", c, baseentry->gpe_index);
796 return (buf);
797 }
798
799 static int
g_part_gpt_probe(struct g_part_table * table,struct g_consumer * cp)800 g_part_gpt_probe(struct g_part_table *table, struct g_consumer *cp)
801 {
802 struct g_provider *pp;
803 u_char *buf;
804 int error, index, pri, res;
805
806 /* We don't nest, which means that our depth should be 0. */
807 if (table->gpt_depth != 0)
808 return (ENXIO);
809
810 pp = cp->provider;
811
812 /*
813 * Sanity-check the provider. Since the first sector on the provider
814 * must be a PMBR and a PMBR is 512 bytes large, the sector size
815 * must be at least 512 bytes. Also, since the theoretical minimum
816 * number of sectors needed by GPT is 6, any medium that has less
817 * than 6 sectors is never going to be able to hold a GPT. The
818 * number 6 comes from:
819 * 1 sector for the PMBR
820 * 2 sectors for the GPT headers (each 1 sector)
821 * 2 sectors for the GPT tables (each 1 sector)
822 * 1 sector for an actual partition
823 * It's better to catch this pathological case early than behaving
824 * pathologically later on...
825 */
826 if (pp->sectorsize < MBRSIZE || pp->mediasize < 6 * pp->sectorsize)
827 return (ENOSPC);
828
829 /*
830 * Check that there's a MBR or a PMBR. If it's a PMBR, we return
831 * as the highest priority on a match, otherwise we assume some
832 * GPT-unaware tool has destroyed the GPT by recreating a MBR and
833 * we really want the MBR scheme to take precedence.
834 */
835 buf = g_read_data(cp, 0L, pp->sectorsize, &error);
836 if (buf == NULL)
837 return (error);
838 res = le16dec(buf + DOSMAGICOFFSET);
839 pri = G_PART_PROBE_PRI_LOW;
840 if (res == DOSMAGIC) {
841 for (index = 0; index < NDOSPART; index++) {
842 if (buf[DOSPARTOFF + DOSPARTSIZE * index + 4] == 0xee)
843 pri = G_PART_PROBE_PRI_HIGH;
844 }
845 g_free(buf);
846
847 /* Check that there's a primary header. */
848 buf = g_read_data(cp, pp->sectorsize, pp->sectorsize, &error);
849 if (buf == NULL)
850 return (error);
851 res = memcmp(buf, GPT_HDR_SIG, 8);
852 g_free(buf);
853 if (res == 0)
854 return (pri);
855 } else
856 g_free(buf);
857
858 /* No primary? Check that there's a secondary. */
859 buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize,
860 &error);
861 if (buf == NULL)
862 return (error);
863 res = memcmp(buf, GPT_HDR_SIG, 8);
864 g_free(buf);
865 return ((res == 0) ? pri : ENXIO);
866 }
867
868 static int
g_part_gpt_read(struct g_part_table * basetable,struct g_consumer * cp)869 g_part_gpt_read(struct g_part_table *basetable, struct g_consumer *cp)
870 {
871 struct gpt_hdr *prihdr, *sechdr;
872 struct gpt_ent *tbl, *pritbl, *sectbl;
873 struct g_provider *pp;
874 struct g_part_gpt_table *table;
875 struct g_part_gpt_entry *entry;
876 u_char *buf;
877 uint64_t last;
878 int error, index;
879
880 table = (struct g_part_gpt_table *)basetable;
881 pp = cp->provider;
882 last = (pp->mediasize / pp->sectorsize) - 1;
883
884 /* Read the PMBR */
885 buf = g_read_data(cp, 0, pp->sectorsize, &error);
886 if (buf == NULL)
887 return (error);
888 bcopy(buf, table->mbr, MBRSIZE);
889 g_free(buf);
890
891 /* Read the primary header and table. */
892 prihdr = gpt_read_hdr(table, cp, GPT_ELT_PRIHDR);
893 if (table->state[GPT_ELT_PRIHDR] == GPT_STATE_OK) {
894 pritbl = gpt_read_tbl(table, cp, GPT_ELT_PRITBL, prihdr);
895 } else {
896 table->state[GPT_ELT_PRITBL] = GPT_STATE_MISSING;
897 pritbl = NULL;
898 }
899
900 /* Read the secondary header and table. */
901 sechdr = gpt_read_hdr(table, cp, GPT_ELT_SECHDR);
902 if (table->state[GPT_ELT_SECHDR] == GPT_STATE_OK) {
903 sectbl = gpt_read_tbl(table, cp, GPT_ELT_SECTBL, sechdr);
904 } else {
905 table->state[GPT_ELT_SECTBL] = GPT_STATE_MISSING;
906 sectbl = NULL;
907 }
908
909 /* Fail if we haven't got any good tables at all. */
910 if (table->state[GPT_ELT_PRITBL] != GPT_STATE_OK &&
911 table->state[GPT_ELT_SECTBL] != GPT_STATE_OK) {
912 printf("GEOM: %s: corrupt or invalid GPT detected.\n",
913 pp->name);
914 printf("GEOM: %s: GPT rejected -- may not be recoverable.\n",
915 pp->name);
916 return (EINVAL);
917 }
918
919 /*
920 * If both headers are good but they disagree with each other,
921 * then invalidate one. We prefer to keep the primary header,
922 * unless the primary table is corrupt.
923 */
924 if (table->state[GPT_ELT_PRIHDR] == GPT_STATE_OK &&
925 table->state[GPT_ELT_SECHDR] == GPT_STATE_OK &&
926 !gpt_matched_hdrs(prihdr, sechdr)) {
927 if (table->state[GPT_ELT_PRITBL] == GPT_STATE_OK) {
928 table->state[GPT_ELT_SECHDR] = GPT_STATE_INVALID;
929 table->state[GPT_ELT_SECTBL] = GPT_STATE_MISSING;
930 g_free(sechdr);
931 sechdr = NULL;
932 } else {
933 table->state[GPT_ELT_PRIHDR] = GPT_STATE_INVALID;
934 table->state[GPT_ELT_PRITBL] = GPT_STATE_MISSING;
935 g_free(prihdr);
936 prihdr = NULL;
937 }
938 }
939
940 if (table->state[GPT_ELT_PRITBL] != GPT_STATE_OK) {
941 printf("GEOM: %s: the primary GPT table is corrupt or "
942 "invalid.\n", pp->name);
943 printf("GEOM: %s: using the secondary instead -- recovery "
944 "strongly advised.\n", pp->name);
945 table->hdr = sechdr;
946 basetable->gpt_corrupt = 1;
947 if (prihdr != NULL)
948 g_free(prihdr);
949 tbl = sectbl;
950 if (pritbl != NULL)
951 g_free(pritbl);
952 } else {
953 if (table->state[GPT_ELT_SECTBL] != GPT_STATE_OK) {
954 printf("GEOM: %s: the secondary GPT table is corrupt "
955 "or invalid.\n", pp->name);
956 printf("GEOM: %s: using the primary only -- recovery "
957 "suggested.\n", pp->name);
958 basetable->gpt_corrupt = 1;
959 } else if (table->lba[GPT_ELT_SECHDR] != last) {
960 printf( "GEOM: %s: the secondary GPT header is not in "
961 "the last LBA.\n", pp->name);
962 basetable->gpt_corrupt = 1;
963 }
964 table->hdr = prihdr;
965 if (sechdr != NULL)
966 g_free(sechdr);
967 tbl = pritbl;
968 if (sectbl != NULL)
969 g_free(sectbl);
970 }
971
972 basetable->gpt_first = table->hdr->hdr_lba_start;
973 basetable->gpt_last = table->hdr->hdr_lba_end;
974 basetable->gpt_entries = (table->hdr->hdr_lba_start - 2) *
975 pp->sectorsize / table->hdr->hdr_entsz;
976
977 for (index = table->hdr->hdr_entries - 1; index >= 0; index--) {
978 if (EQUUID(&tbl[index].ent_type, &gpt_uuid_unused))
979 continue;
980 entry = (struct g_part_gpt_entry *)g_part_new_entry(
981 basetable, index + 1, tbl[index].ent_lba_start,
982 tbl[index].ent_lba_end);
983 entry->ent = tbl[index];
984 }
985
986 g_free(tbl);
987
988 /*
989 * Under Mac OS X, the MBR mirrors the first 4 GPT partitions
990 * if (and only if) any FAT32 or FAT16 partitions have been
991 * created. This happens irrespective of whether Boot Camp is
992 * used/enabled, though it's generally understood to be done
993 * to support legacy Windows under Boot Camp. We refer to this
994 * mirroring simply as Boot Camp. We try to detect Boot Camp
995 * so that we can update the MBR if and when GPT changes have
996 * been made. Note that we do not enable Boot Camp if not
997 * previously enabled because we can't assume that we're on a
998 * Mac alongside Mac OS X.
999 */
1000 table->bootcamp = gpt_is_bootcamp(table, pp->name);
1001
1002 return (0);
1003 }
1004
1005 static int
g_part_gpt_recover(struct g_part_table * basetable)1006 g_part_gpt_recover(struct g_part_table *basetable)
1007 {
1008 struct g_part_gpt_table *table;
1009 struct g_provider *pp;
1010
1011 table = (struct g_part_gpt_table *)basetable;
1012 pp = LIST_FIRST(&basetable->gpt_gp->consumer)->provider;
1013 gpt_create_pmbr(table, pp);
1014 g_gpt_set_defaults(basetable, pp);
1015 basetable->gpt_corrupt = 0;
1016 return (0);
1017 }
1018
1019 static int
g_part_gpt_setunset(struct g_part_table * basetable,struct g_part_entry * baseentry,const char * attrib,unsigned int set)1020 g_part_gpt_setunset(struct g_part_table *basetable,
1021 struct g_part_entry *baseentry, const char *attrib, unsigned int set)
1022 {
1023 struct g_part_gpt_entry *entry;
1024 struct g_part_gpt_table *table;
1025 struct g_provider *pp;
1026 uint8_t *p;
1027 uint64_t attr;
1028 int i;
1029
1030 table = (struct g_part_gpt_table *)basetable;
1031 entry = (struct g_part_gpt_entry *)baseentry;
1032
1033 if (strcasecmp(attrib, "active") == 0) {
1034 if (table->bootcamp) {
1035 /* The active flag must be set on a valid entry. */
1036 if (entry == NULL)
1037 return (ENXIO);
1038 if (baseentry->gpe_index > NDOSPART)
1039 return (EINVAL);
1040 for (i = 0; i < NDOSPART; i++) {
1041 p = &table->mbr[DOSPARTOFF + i * DOSPARTSIZE];
1042 p[0] = (i == baseentry->gpe_index - 1)
1043 ? ((set) ? 0x80 : 0) : 0;
1044 }
1045 } else {
1046 /* The PMBR is marked as active without an entry. */
1047 if (entry != NULL)
1048 return (ENXIO);
1049 for (i = 0; i < NDOSPART; i++) {
1050 p = &table->mbr[DOSPARTOFF + i * DOSPARTSIZE];
1051 p[0] = (p[4] == 0xee) ? ((set) ? 0x80 : 0) : 0;
1052 }
1053 }
1054 return (0);
1055 } else if (strcasecmp(attrib, "lenovofix") == 0) {
1056 /*
1057 * Write the 0xee GPT entry to slot #1 (2nd slot) in the pMBR.
1058 * This workaround allows Lenovo X220, T420, T520, etc to boot
1059 * from GPT Partitions in BIOS mode.
1060 */
1061
1062 if (entry != NULL)
1063 return (ENXIO);
1064
1065 pp = LIST_FIRST(&basetable->gpt_gp->consumer)->provider;
1066 bzero(table->mbr + DOSPARTOFF, DOSPARTSIZE * NDOSPART);
1067 gpt_write_mbr_entry(table->mbr, ((set) ? 1 : 0), 0xee, 1,
1068 MIN(pp->mediasize / pp->sectorsize - 1, UINT32_MAX));
1069 return (0);
1070 }
1071
1072 if (entry == NULL)
1073 return (ENODEV);
1074
1075 attr = 0;
1076 if (strcasecmp(attrib, "bootme") == 0) {
1077 attr |= GPT_ENT_ATTR_BOOTME;
1078 } else if (strcasecmp(attrib, "bootonce") == 0) {
1079 attr |= GPT_ENT_ATTR_BOOTONCE;
1080 if (set)
1081 attr |= GPT_ENT_ATTR_BOOTME;
1082 } else if (strcasecmp(attrib, "bootfailed") == 0) {
1083 /*
1084 * It should only be possible to unset BOOTFAILED, but it might
1085 * be useful for test purposes to also be able to set it.
1086 */
1087 attr |= GPT_ENT_ATTR_BOOTFAILED;
1088 }
1089 if (attr == 0)
1090 return (EINVAL);
1091
1092 if (set)
1093 attr = entry->ent.ent_attr | attr;
1094 else
1095 attr = entry->ent.ent_attr & ~attr;
1096 if (attr != entry->ent.ent_attr) {
1097 entry->ent.ent_attr = attr;
1098 if (!baseentry->gpe_created)
1099 baseentry->gpe_modified = 1;
1100 }
1101 return (0);
1102 }
1103
1104 static const char *
g_part_gpt_type(struct g_part_table * basetable,struct g_part_entry * baseentry,char * buf,size_t bufsz)1105 g_part_gpt_type(struct g_part_table *basetable, struct g_part_entry *baseentry,
1106 char *buf, size_t bufsz)
1107 {
1108 struct g_part_gpt_entry *entry;
1109 struct uuid *type;
1110 struct g_part_uuid_alias *uap;
1111
1112 entry = (struct g_part_gpt_entry *)baseentry;
1113 type = &entry->ent.ent_type;
1114 for (uap = &gpt_uuid_alias_match[0]; uap->uuid; uap++)
1115 if (EQUUID(type, uap->uuid))
1116 return (g_part_alias_name(uap->alias));
1117 buf[0] = '!';
1118 snprintf_uuid(buf + 1, bufsz - 1, type);
1119
1120 return (buf);
1121 }
1122
1123 static int
g_part_gpt_write(struct g_part_table * basetable,struct g_consumer * cp)1124 g_part_gpt_write(struct g_part_table *basetable, struct g_consumer *cp)
1125 {
1126 unsigned char *buf, *bp;
1127 struct g_provider *pp;
1128 struct g_part_entry *baseentry;
1129 struct g_part_gpt_entry *entry;
1130 struct g_part_gpt_table *table;
1131 size_t tblsz;
1132 uint32_t crc;
1133 int error, index;
1134
1135 pp = cp->provider;
1136 table = (struct g_part_gpt_table *)basetable;
1137 tblsz = (table->hdr->hdr_entries * table->hdr->hdr_entsz +
1138 pp->sectorsize - 1) / pp->sectorsize;
1139
1140 /* Reconstruct the MBR from the GPT if under Boot Camp. */
1141 if (table->bootcamp)
1142 gpt_update_bootcamp(basetable, pp);
1143
1144 /* Write the PMBR */
1145 buf = g_malloc(pp->sectorsize, M_WAITOK | M_ZERO);
1146 bcopy(table->mbr, buf, MBRSIZE);
1147 error = g_write_data(cp, 0, buf, pp->sectorsize);
1148 g_free(buf);
1149 if (error)
1150 return (error);
1151
1152 /* Allocate space for the header and entries. */
1153 buf = g_malloc((tblsz + 1) * pp->sectorsize, M_WAITOK | M_ZERO);
1154
1155 memcpy(buf, table->hdr->hdr_sig, sizeof(table->hdr->hdr_sig));
1156 le32enc(buf + 8, table->hdr->hdr_revision);
1157 le32enc(buf + 12, table->hdr->hdr_size);
1158 le64enc(buf + 40, table->hdr->hdr_lba_start);
1159 le64enc(buf + 48, table->hdr->hdr_lba_end);
1160 le_uuid_enc(buf + 56, &table->hdr->hdr_uuid);
1161 le32enc(buf + 80, table->hdr->hdr_entries);
1162 le32enc(buf + 84, table->hdr->hdr_entsz);
1163
1164 LIST_FOREACH(baseentry, &basetable->gpt_entry, gpe_entry) {
1165 if (baseentry->gpe_deleted)
1166 continue;
1167 entry = (struct g_part_gpt_entry *)baseentry;
1168 index = baseentry->gpe_index - 1;
1169 bp = buf + pp->sectorsize + table->hdr->hdr_entsz * index;
1170 le_uuid_enc(bp, &entry->ent.ent_type);
1171 le_uuid_enc(bp + 16, &entry->ent.ent_uuid);
1172 le64enc(bp + 32, entry->ent.ent_lba_start);
1173 le64enc(bp + 40, entry->ent.ent_lba_end);
1174 le64enc(bp + 48, entry->ent.ent_attr);
1175 memcpy(bp + 56, entry->ent.ent_name,
1176 sizeof(entry->ent.ent_name));
1177 }
1178
1179 crc = crc32(buf + pp->sectorsize,
1180 table->hdr->hdr_entries * table->hdr->hdr_entsz);
1181 le32enc(buf + 88, crc);
1182
1183 /* Write primary meta-data. */
1184 le32enc(buf + 16, 0); /* hdr_crc_self. */
1185 le64enc(buf + 24, table->lba[GPT_ELT_PRIHDR]); /* hdr_lba_self. */
1186 le64enc(buf + 32, table->lba[GPT_ELT_SECHDR]); /* hdr_lba_alt. */
1187 le64enc(buf + 72, table->lba[GPT_ELT_PRITBL]); /* hdr_lba_table. */
1188 crc = crc32(buf, table->hdr->hdr_size);
1189 le32enc(buf + 16, crc);
1190
1191 for (index = 0; index < tblsz; index += MAXPHYS / pp->sectorsize) {
1192 error = g_write_data(cp,
1193 (table->lba[GPT_ELT_PRITBL] + index) * pp->sectorsize,
1194 buf + (index + 1) * pp->sectorsize,
1195 (tblsz - index > MAXPHYS / pp->sectorsize) ? MAXPHYS:
1196 (tblsz - index) * pp->sectorsize);
1197 if (error)
1198 goto out;
1199 }
1200 error = g_write_data(cp, table->lba[GPT_ELT_PRIHDR] * pp->sectorsize,
1201 buf, pp->sectorsize);
1202 if (error)
1203 goto out;
1204
1205 /* Write secondary meta-data. */
1206 le32enc(buf + 16, 0); /* hdr_crc_self. */
1207 le64enc(buf + 24, table->lba[GPT_ELT_SECHDR]); /* hdr_lba_self. */
1208 le64enc(buf + 32, table->lba[GPT_ELT_PRIHDR]); /* hdr_lba_alt. */
1209 le64enc(buf + 72, table->lba[GPT_ELT_SECTBL]); /* hdr_lba_table. */
1210 crc = crc32(buf, table->hdr->hdr_size);
1211 le32enc(buf + 16, crc);
1212
1213 for (index = 0; index < tblsz; index += MAXPHYS / pp->sectorsize) {
1214 error = g_write_data(cp,
1215 (table->lba[GPT_ELT_SECTBL] + index) * pp->sectorsize,
1216 buf + (index + 1) * pp->sectorsize,
1217 (tblsz - index > MAXPHYS / pp->sectorsize) ? MAXPHYS:
1218 (tblsz - index) * pp->sectorsize);
1219 if (error)
1220 goto out;
1221 }
1222 error = g_write_data(cp, table->lba[GPT_ELT_SECHDR] * pp->sectorsize,
1223 buf, pp->sectorsize);
1224
1225 out:
1226 g_free(buf);
1227 return (error);
1228 }
1229
1230 static void
g_gpt_set_defaults(struct g_part_table * basetable,struct g_provider * pp)1231 g_gpt_set_defaults(struct g_part_table *basetable, struct g_provider *pp)
1232 {
1233 struct g_part_entry *baseentry;
1234 struct g_part_gpt_entry *entry;
1235 struct g_part_gpt_table *table;
1236 quad_t start, end, min, max;
1237 quad_t lba, last;
1238 size_t spb, tblsz;
1239
1240 table = (struct g_part_gpt_table *)basetable;
1241 last = pp->mediasize / pp->sectorsize - 1;
1242 tblsz = (basetable->gpt_entries * sizeof(struct gpt_ent) +
1243 pp->sectorsize - 1) / pp->sectorsize;
1244
1245 table->lba[GPT_ELT_PRIHDR] = 1;
1246 table->lba[GPT_ELT_PRITBL] = 2;
1247 table->lba[GPT_ELT_SECHDR] = last;
1248 table->lba[GPT_ELT_SECTBL] = last - tblsz;
1249 table->state[GPT_ELT_PRIHDR] = GPT_STATE_OK;
1250 table->state[GPT_ELT_PRITBL] = GPT_STATE_OK;
1251 table->state[GPT_ELT_SECHDR] = GPT_STATE_OK;
1252 table->state[GPT_ELT_SECTBL] = GPT_STATE_OK;
1253
1254 max = start = 2 + tblsz;
1255 min = end = last - tblsz - 1;
1256 LIST_FOREACH(baseentry, &basetable->gpt_entry, gpe_entry) {
1257 if (baseentry->gpe_deleted)
1258 continue;
1259 entry = (struct g_part_gpt_entry *)baseentry;
1260 if (entry->ent.ent_lba_start < min)
1261 min = entry->ent.ent_lba_start;
1262 if (entry->ent.ent_lba_end > max)
1263 max = entry->ent.ent_lba_end;
1264 }
1265 spb = 4096 / pp->sectorsize;
1266 if (spb > 1) {
1267 lba = start + ((start % spb) ? spb - start % spb : 0);
1268 if (lba <= min)
1269 start = lba;
1270 lba = end - (end + 1) % spb;
1271 if (max <= lba)
1272 end = lba;
1273 }
1274 table->hdr->hdr_lba_start = start;
1275 table->hdr->hdr_lba_end = end;
1276
1277 basetable->gpt_first = start;
1278 basetable->gpt_last = end;
1279 }
1280
1281 static void
g_gpt_printf_utf16(struct sbuf * sb,uint16_t * str,size_t len)1282 g_gpt_printf_utf16(struct sbuf *sb, uint16_t *str, size_t len)
1283 {
1284 u_int bo;
1285 uint32_t ch;
1286 uint16_t c;
1287
1288 bo = LITTLE_ENDIAN; /* GPT is little-endian */
1289 while (len > 0 && *str != 0) {
1290 ch = (bo == BIG_ENDIAN) ? be16toh(*str) : le16toh(*str);
1291 str++, len--;
1292 if ((ch & 0xf800) == 0xd800) {
1293 if (len > 0) {
1294 c = (bo == BIG_ENDIAN) ? be16toh(*str)
1295 : le16toh(*str);
1296 str++, len--;
1297 } else
1298 c = 0xfffd;
1299 if ((ch & 0x400) == 0 && (c & 0xfc00) == 0xdc00) {
1300 ch = ((ch & 0x3ff) << 10) + (c & 0x3ff);
1301 ch += 0x10000;
1302 } else
1303 ch = 0xfffd;
1304 } else if (ch == 0xfffe) { /* BOM (U+FEFF) swapped. */
1305 bo = (bo == BIG_ENDIAN) ? LITTLE_ENDIAN : BIG_ENDIAN;
1306 continue;
1307 } else if (ch == 0xfeff) /* BOM (U+FEFF) unswapped. */
1308 continue;
1309
1310 /* Write the Unicode character in UTF-8 */
1311 if (ch < 0x80)
1312 g_conf_printf_escaped(sb, "%c", ch);
1313 else if (ch < 0x800)
1314 g_conf_printf_escaped(sb, "%c%c", 0xc0 | (ch >> 6),
1315 0x80 | (ch & 0x3f));
1316 else if (ch < 0x10000)
1317 g_conf_printf_escaped(sb, "%c%c%c", 0xe0 | (ch >> 12),
1318 0x80 | ((ch >> 6) & 0x3f), 0x80 | (ch & 0x3f));
1319 else if (ch < 0x200000)
1320 g_conf_printf_escaped(sb, "%c%c%c%c", 0xf0 |
1321 (ch >> 18), 0x80 | ((ch >> 12) & 0x3f),
1322 0x80 | ((ch >> 6) & 0x3f), 0x80 | (ch & 0x3f));
1323 }
1324 }
1325
1326 static void
g_gpt_utf8_to_utf16(const uint8_t * s8,uint16_t * s16,size_t s16len)1327 g_gpt_utf8_to_utf16(const uint8_t *s8, uint16_t *s16, size_t s16len)
1328 {
1329 size_t s16idx, s8idx;
1330 uint32_t utfchar;
1331 unsigned int c, utfbytes;
1332
1333 s8idx = s16idx = 0;
1334 utfchar = 0;
1335 utfbytes = 0;
1336 bzero(s16, s16len << 1);
1337 while (s8[s8idx] != 0 && s16idx < s16len) {
1338 c = s8[s8idx++];
1339 if ((c & 0xc0) != 0x80) {
1340 /* Initial characters. */
1341 if (utfbytes != 0) {
1342 /* Incomplete encoding of previous char. */
1343 s16[s16idx++] = htole16(0xfffd);
1344 }
1345 if ((c & 0xf8) == 0xf0) {
1346 utfchar = c & 0x07;
1347 utfbytes = 3;
1348 } else if ((c & 0xf0) == 0xe0) {
1349 utfchar = c & 0x0f;
1350 utfbytes = 2;
1351 } else if ((c & 0xe0) == 0xc0) {
1352 utfchar = c & 0x1f;
1353 utfbytes = 1;
1354 } else {
1355 utfchar = c & 0x7f;
1356 utfbytes = 0;
1357 }
1358 } else {
1359 /* Followup characters. */
1360 if (utfbytes > 0) {
1361 utfchar = (utfchar << 6) + (c & 0x3f);
1362 utfbytes--;
1363 } else if (utfbytes == 0)
1364 utfbytes = ~0;
1365 }
1366 /*
1367 * Write the complete Unicode character as UTF-16 when we
1368 * have all the UTF-8 charactars collected.
1369 */
1370 if (utfbytes == 0) {
1371 /*
1372 * If we need to write 2 UTF-16 characters, but
1373 * we only have room for 1, then we truncate the
1374 * string by writing a 0 instead.
1375 */
1376 if (utfchar >= 0x10000 && s16idx < s16len - 1) {
1377 s16[s16idx++] =
1378 htole16(0xd800 | ((utfchar >> 10) - 0x40));
1379 s16[s16idx++] =
1380 htole16(0xdc00 | (utfchar & 0x3ff));
1381 } else
1382 s16[s16idx++] = (utfchar >= 0x10000) ? 0 :
1383 htole16(utfchar);
1384 }
1385 }
1386 /*
1387 * If our input string was truncated, append an invalid encoding
1388 * character to the output string.
1389 */
1390 if (utfbytes != 0 && s16idx < s16len)
1391 s16[s16idx++] = htole16(0xfffd);
1392 }
1393