2 * Copyright (c) 2012 Andrey V. Elsukov <ae@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
32 #include <sys/diskmbr.h>
33 #include <sys/disklabel.h>
34 #include <sys/endian.h>
36 #include <sys/stddef.h>
37 #include <sys/queue.h>
40 #include <fs/cd9660/iso.h>
47 #define DPRINTF(fmt, args...) printf("%s: " fmt "\n", __func__, ## args)
49 #define DPRINTF(fmt, args...) ((void)0)
52 #ifdef LOADER_GPT_SUPPORT
54 static const uuid_t gpt_uuid_unused = GPT_ENT_TYPE_UNUSED;
55 static const uuid_t gpt_uuid_ms_basic_data = GPT_ENT_TYPE_MS_BASIC_DATA;
56 static const uuid_t gpt_uuid_freebsd_ufs = GPT_ENT_TYPE_FREEBSD_UFS;
57 static const uuid_t gpt_uuid_efi = GPT_ENT_TYPE_EFI;
58 static const uuid_t gpt_uuid_freebsd = GPT_ENT_TYPE_FREEBSD;
59 static const uuid_t gpt_uuid_freebsd_boot = GPT_ENT_TYPE_FREEBSD_BOOT;
60 static const uuid_t gpt_uuid_freebsd_swap = GPT_ENT_TYPE_FREEBSD_SWAP;
61 static const uuid_t gpt_uuid_freebsd_zfs = GPT_ENT_TYPE_FREEBSD_ZFS;
62 static const uuid_t gpt_uuid_freebsd_vinum = GPT_ENT_TYPE_FREEBSD_VINUM;
66 struct ptable_entry part;
74 STAILQ_ENTRY(pentry) entry;
78 enum ptable_type type;
82 STAILQ_HEAD(, pentry) entries;
85 static struct parttypes {
86 enum partition_type type;
89 { PART_UNKNOWN, "Unknown" },
91 { PART_FREEBSD, "FreeBSD" },
92 { PART_FREEBSD_BOOT, "FreeBSD boot" },
93 { PART_FREEBSD_UFS, "FreeBSD UFS" },
94 { PART_FREEBSD_ZFS, "FreeBSD ZFS" },
95 { PART_FREEBSD_SWAP, "FreeBSD swap" },
96 { PART_FREEBSD_VINUM, "FreeBSD vinum" },
97 { PART_LINUX, "Linux" },
98 { PART_LINUX_SWAP, "Linux swap" },
99 { PART_DOS, "DOS/Windows" },
100 { PART_ISO9660, "ISO9660" },
104 parttype2str(enum partition_type type)
108 for (i = 0; i < nitems(ptypes); i++)
109 if (ptypes[i].type == type)
110 return (ptypes[i].desc);
111 return (ptypes[0].desc);
114 #ifdef LOADER_GPT_SUPPORT
116 uuid_letoh(uuid_t *uuid)
119 uuid->time_low = le32toh(uuid->time_low);
120 uuid->time_mid = le16toh(uuid->time_mid);
121 uuid->time_hi_and_version = le16toh(uuid->time_hi_and_version);
124 static enum partition_type
125 gpt_parttype(uuid_t type)
128 if (uuid_equal(&type, &gpt_uuid_efi, NULL))
130 else if (uuid_equal(&type, &gpt_uuid_ms_basic_data, NULL))
132 else if (uuid_equal(&type, &gpt_uuid_freebsd_boot, NULL))
133 return (PART_FREEBSD_BOOT);
134 else if (uuid_equal(&type, &gpt_uuid_freebsd_ufs, NULL))
135 return (PART_FREEBSD_UFS);
136 else if (uuid_equal(&type, &gpt_uuid_freebsd_zfs, NULL))
137 return (PART_FREEBSD_ZFS);
138 else if (uuid_equal(&type, &gpt_uuid_freebsd_swap, NULL))
139 return (PART_FREEBSD_SWAP);
140 else if (uuid_equal(&type, &gpt_uuid_freebsd_vinum, NULL))
141 return (PART_FREEBSD_VINUM);
142 else if (uuid_equal(&type, &gpt_uuid_freebsd, NULL))
143 return (PART_FREEBSD);
144 return (PART_UNKNOWN);
147 static struct gpt_hdr *
148 gpt_checkhdr(struct gpt_hdr *hdr, uint64_t lba_self, uint64_t lba_last,
153 if (memcmp(hdr->hdr_sig, GPT_HDR_SIG, sizeof(hdr->hdr_sig)) != 0) {
154 DPRINTF("no GPT signature");
157 sz = le32toh(hdr->hdr_size);
158 if (sz < 92 || sz > sectorsize) {
159 DPRINTF("invalid GPT header size: %d", sz);
162 crc = le32toh(hdr->hdr_crc_self);
163 hdr->hdr_crc_self = 0;
164 if (crc32(hdr, sz) != crc) {
165 DPRINTF("GPT header's CRC doesn't match");
168 hdr->hdr_crc_self = crc;
169 hdr->hdr_revision = le32toh(hdr->hdr_revision);
170 if (hdr->hdr_revision < GPT_HDR_REVISION) {
171 DPRINTF("unsupported GPT revision %d", hdr->hdr_revision);
174 hdr->hdr_lba_self = le64toh(hdr->hdr_lba_self);
175 if (hdr->hdr_lba_self != lba_self) {
176 DPRINTF("self LBA doesn't match");
179 hdr->hdr_lba_alt = le64toh(hdr->hdr_lba_alt);
180 if (hdr->hdr_lba_alt == hdr->hdr_lba_self) {
181 DPRINTF("invalid alternate LBA");
184 hdr->hdr_entries = le32toh(hdr->hdr_entries);
185 hdr->hdr_entsz = le32toh(hdr->hdr_entsz);
186 if (hdr->hdr_entries == 0 ||
187 hdr->hdr_entsz < sizeof(struct gpt_ent) ||
188 sectorsize % hdr->hdr_entsz != 0) {
189 DPRINTF("invalid entry size or number of entries");
192 hdr->hdr_lba_start = le64toh(hdr->hdr_lba_start);
193 hdr->hdr_lba_end = le64toh(hdr->hdr_lba_end);
194 hdr->hdr_lba_table = le64toh(hdr->hdr_lba_table);
195 hdr->hdr_crc_table = le32toh(hdr->hdr_crc_table);
196 uuid_letoh(&hdr->hdr_uuid);
201 gpt_checktbl(const struct gpt_hdr *hdr, uint8_t *tbl, size_t size,
207 cnt = size / hdr->hdr_entsz;
208 if (hdr->hdr_entries <= cnt) {
209 cnt = hdr->hdr_entries;
210 /* Check CRC only when buffer size is enough for table. */
211 if (hdr->hdr_crc_table !=
212 crc32(tbl, hdr->hdr_entries * hdr->hdr_entsz)) {
213 DPRINTF("GPT table's CRC doesn't match");
217 for (i = 0; i < cnt; i++) {
218 ent = (struct gpt_ent *)(tbl + i * hdr->hdr_entsz);
219 uuid_letoh(&ent->ent_type);
220 if (uuid_equal(&ent->ent_type, &gpt_uuid_unused, NULL))
222 ent->ent_lba_start = le64toh(ent->ent_lba_start);
223 ent->ent_lba_end = le64toh(ent->ent_lba_end);
228 static struct ptable *
229 ptable_gptread(struct ptable *table, void *dev, diskread_t dread)
231 struct pentry *entry;
232 struct gpt_hdr *phdr, hdr;
239 buf = malloc(table->sectorsize);
242 tbl = malloc(table->sectorsize * MAXTBLSZ);
247 /* Read the primary GPT header. */
248 if (dread(dev, buf, 1, 1) != 0) {
254 /* Check the primary GPT header. */
255 phdr = gpt_checkhdr((struct gpt_hdr *)buf, 1, table->sectors - 1,
258 /* Read the primary GPT table. */
260 howmany(phdr->hdr_entries * phdr->hdr_entsz,
262 if (dread(dev, tbl, size, phdr->hdr_lba_table) == 0 &&
263 gpt_checktbl(phdr, tbl, size * table->sectorsize,
264 table->sectors - 1) == 0) {
265 memcpy(&hdr, phdr, sizeof(hdr));
269 offset = pri ? hdr.hdr_lba_alt: table->sectors - 1;
270 /* Read the backup GPT header. */
271 if (dread(dev, buf, 1, offset) != 0)
274 phdr = gpt_checkhdr((struct gpt_hdr *)buf, offset,
275 table->sectors - 1, table->sectorsize);
278 * Compare primary and backup headers.
279 * If they are equal, then we do not need to read backup
280 * table. If they are different, then prefer backup header
281 * and try to read backup table.
284 uuid_equal(&hdr.hdr_uuid, &phdr->hdr_uuid, NULL) == 0 ||
285 hdr.hdr_revision != phdr->hdr_revision ||
286 hdr.hdr_size != phdr->hdr_size ||
287 hdr.hdr_lba_start != phdr->hdr_lba_start ||
288 hdr.hdr_lba_end != phdr->hdr_lba_end ||
289 hdr.hdr_entries != phdr->hdr_entries ||
290 hdr.hdr_entsz != phdr->hdr_entsz ||
291 hdr.hdr_crc_table != phdr->hdr_crc_table) {
292 /* Read the backup GPT table. */
294 howmany(phdr->hdr_entries * phdr->hdr_entsz,
296 if (dread(dev, tbl, size, phdr->hdr_lba_table) == 0 &&
297 gpt_checktbl(phdr, tbl, size * table->sectorsize,
298 table->sectors - 1) == 0) {
299 memcpy(&hdr, phdr, sizeof(hdr));
304 if (pri == 0 && sec == 0) {
305 /* Both primary and backup tables are invalid. */
306 table->type = PTABLE_NONE;
309 DPRINTF("GPT detected");
310 size = MIN(hdr.hdr_entries * hdr.hdr_entsz,
311 MAXTBLSZ * table->sectorsize);
314 * If the disk's sector count is smaller than the sector count recorded
315 * in the disk's GPT table header, set the table->sectors to the value
316 * recorded in GPT tables. This is done to work around buggy firmware
317 * that returns truncated disk sizes.
319 * Note, this is still not a foolproof way to get disk's size. For
320 * example, an image file can be truncated when copied to smaller media.
322 table->sectors = hdr.hdr_lba_alt + 1;
324 for (i = 0; i < size / hdr.hdr_entsz; i++) {
325 ent = (struct gpt_ent *)(tbl + i * hdr.hdr_entsz);
326 if (uuid_equal(&ent->ent_type, &gpt_uuid_unused, NULL))
329 /* Simple sanity checks. */
330 if (ent->ent_lba_start < hdr.hdr_lba_start ||
331 ent->ent_lba_end > hdr.hdr_lba_end ||
332 ent->ent_lba_start > ent->ent_lba_end)
335 entry = malloc(sizeof(*entry));
338 entry->part.start = ent->ent_lba_start;
339 entry->part.end = ent->ent_lba_end;
340 entry->part.index = i + 1;
341 entry->part.type = gpt_parttype(ent->ent_type);
342 entry->flags = le64toh(ent->ent_attr);
343 memcpy(&entry->type.gpt, &ent->ent_type, sizeof(uuid_t));
344 STAILQ_INSERT_TAIL(&table->entries, entry, entry);
345 DPRINTF("new GPT partition added");
352 #endif /* LOADER_GPT_SUPPORT */
354 #ifdef LOADER_MBR_SUPPORT
355 /* We do not need to support too many EBR partitions in the loader */
356 #define MAXEBRENTRIES 8
357 static enum partition_type
358 mbr_parttype(uint8_t type)
363 return (PART_FREEBSD);
365 return (PART_LINUX_SWAP);
377 return (PART_UNKNOWN);
380 static struct ptable *
381 ptable_ebrread(struct ptable *table, void *dev, diskread_t dread)
383 struct dos_partition *dp;
384 struct pentry *e1, *entry;
385 uint32_t start, end, offset;
389 STAILQ_FOREACH(e1, &table->entries, entry) {
390 if (e1->type.mbr == DOSPTYP_EXT ||
391 e1->type.mbr == DOSPTYP_EXTLBA)
397 offset = e1->part.start;
398 buf = malloc(table->sectorsize);
401 DPRINTF("EBR detected");
402 for (i = 0; i < MAXEBRENTRIES; i++) {
403 #if 0 /* Some BIOSes return an incorrect number of sectors */
404 if (offset >= table->sectors)
407 if (dread(dev, buf, 1, offset) != 0)
409 dp = (struct dos_partition *)(buf + DOSPARTOFF);
410 if (dp[0].dp_typ == 0)
412 start = le32toh(dp[0].dp_start);
413 if (dp[0].dp_typ == DOSPTYP_EXT &&
415 offset = e1->part.start + start;
418 end = le32toh(dp[0].dp_size);
419 entry = malloc(sizeof(*entry));
422 entry->part.start = offset + start;
423 entry->part.end = entry->part.start + end - 1;
424 entry->part.index = index++;
425 entry->part.type = mbr_parttype(dp[0].dp_typ);
426 entry->flags = dp[0].dp_flag;
427 entry->type.mbr = dp[0].dp_typ;
428 STAILQ_INSERT_TAIL(&table->entries, entry, entry);
429 DPRINTF("new EBR partition added");
430 if (dp[1].dp_typ == 0)
432 offset = e1->part.start + le32toh(dp[1].dp_start);
437 #endif /* LOADER_MBR_SUPPORT */
439 static enum partition_type
440 bsd_parttype(uint8_t type)
445 return (PART_FREEBSD_SWAP);
447 return (PART_FREEBSD_UFS);
449 return (PART_FREEBSD_VINUM);
451 return (PART_FREEBSD_ZFS);
453 return (PART_UNKNOWN);
456 static struct ptable *
457 ptable_bsdread(struct ptable *table, void *dev, diskread_t dread)
459 struct disklabel *dl;
460 struct partition *part;
461 struct pentry *entry;
466 if (table->sectorsize < sizeof(struct disklabel)) {
467 DPRINTF("Too small sectorsize");
470 buf = malloc(table->sectorsize);
473 if (dread(dev, buf, 1, 1) != 0) {
474 DPRINTF("read failed");
479 dl = (struct disklabel *)buf;
480 if (le32toh(dl->d_magic) != DISKMAGIC &&
481 le32toh(dl->d_magic2) != DISKMAGIC)
483 if (le32toh(dl->d_secsize) != table->sectorsize) {
484 DPRINTF("unsupported sector size");
487 dl->d_npartitions = le16toh(dl->d_npartitions);
488 if (dl->d_npartitions > 20 || dl->d_npartitions < 8) {
489 DPRINTF("invalid number of partitions");
492 DPRINTF("BSD detected");
493 part = &dl->d_partitions[0];
494 raw_offset = le32toh(part[RAW_PART].p_offset);
495 for (i = 0; i < dl->d_npartitions; i++, part++) {
498 if (part->p_size == 0)
500 entry = malloc(sizeof(*entry));
503 entry->part.start = le32toh(part->p_offset) - raw_offset;
504 entry->part.end = entry->part.start +
505 le32toh(part->p_size) - 1;
506 entry->part.type = bsd_parttype(part->p_fstype);
507 entry->part.index = i; /* starts from zero */
508 entry->type.bsd = part->p_fstype;
509 STAILQ_INSERT_TAIL(&table->entries, entry, entry);
510 DPRINTF("new BSD partition added");
512 table->type = PTABLE_BSD;
518 #ifdef LOADER_VTOC8_SUPPORT
519 static enum partition_type
520 vtoc8_parttype(uint16_t type)
524 case VTOC_TAG_FREEBSD_SWAP:
525 return (PART_FREEBSD_SWAP);
526 case VTOC_TAG_FREEBSD_UFS:
527 return (PART_FREEBSD_UFS);
528 case VTOC_TAG_FREEBSD_VINUM:
529 return (PART_FREEBSD_VINUM);
530 case VTOC_TAG_FREEBSD_ZFS:
531 return (PART_FREEBSD_ZFS);
533 return (PART_UNKNOWN);
536 static struct ptable *
537 ptable_vtoc8read(struct ptable *table, void *dev, diskread_t dread)
539 struct pentry *entry;
542 uint16_t sum, heads, sectors;
545 if (table->sectorsize != sizeof(struct vtoc8))
547 buf = malloc(table->sectorsize);
550 if (dread(dev, buf, 1, 0) != 0) {
551 DPRINTF("read failed");
556 dl = (struct vtoc8 *)buf;
558 for (i = sum = 0; i < sizeof(struct vtoc8); i += sizeof(sum))
559 sum ^= be16dec(buf + i);
561 DPRINTF("incorrect checksum");
564 if (be16toh(dl->nparts) != VTOC8_NPARTS) {
565 DPRINTF("invalid number of entries");
568 sectors = be16toh(dl->nsecs);
569 heads = be16toh(dl->nheads);
570 if (sectors * heads == 0) {
571 DPRINTF("invalid geometry");
574 DPRINTF("VTOC8 detected");
575 for (i = 0; i < VTOC8_NPARTS; i++) {
576 dl->part[i].tag = be16toh(dl->part[i].tag);
577 if (i == VTOC_RAW_PART ||
578 dl->part[i].tag == VTOC_TAG_UNASSIGNED)
580 entry = malloc(sizeof(*entry));
583 entry->part.start = be32toh(dl->map[i].cyl) * heads * sectors;
584 entry->part.end = be32toh(dl->map[i].nblks) +
585 entry->part.start - 1;
586 entry->part.type = vtoc8_parttype(dl->part[i].tag);
587 entry->part.index = i; /* starts from zero */
588 entry->type.vtoc8 = dl->part[i].tag;
589 STAILQ_INSERT_TAIL(&table->entries, entry, entry);
590 DPRINTF("new VTOC8 partition added");
592 table->type = PTABLE_VTOC8;
598 #endif /* LOADER_VTOC8_SUPPORT */
600 #define cdb2devb(bno) ((bno) * ISO_DEFAULT_BLOCK_SIZE / table->sectorsize)
602 static struct ptable *
603 ptable_iso9660read(struct ptable *table, void *dev, diskread_t dread)
606 struct iso_primary_descriptor *vd;
607 struct pentry *entry;
609 buf = malloc(table->sectorsize);
613 if (dread(dev, buf, 1, cdb2devb(16)) != 0) {
614 DPRINTF("read failed");
619 vd = (struct iso_primary_descriptor *)buf;
620 if (bcmp(vd->id, ISO_STANDARD_ID, sizeof vd->id) != 0)
623 entry = malloc(sizeof(*entry));
626 entry->part.start = 0;
627 entry->part.end = table->sectors;
628 entry->part.type = PART_ISO9660;
629 entry->part.index = 0;
630 STAILQ_INSERT_TAIL(&table->entries, entry, entry);
632 table->type = PTABLE_ISO9660;
640 ptable_open(void *dev, uint64_t sectors, uint16_t sectorsize,
643 struct dos_partition *dp;
644 struct ptable *table;
647 #ifdef LOADER_MBR_SUPPORT
648 struct pentry *entry;
653 buf = malloc(sectorsize);
656 /* First, read the MBR. */
657 if (dread(dev, buf, 1, DOSBBSECTOR) != 0) {
658 DPRINTF("read failed");
662 table = malloc(sizeof(*table));
665 table->sectors = sectors;
666 table->sectorsize = sectorsize;
667 table->type = PTABLE_NONE;
668 STAILQ_INIT(&table->entries);
670 if (ptable_iso9660read(table, dev, dread) == NULL) {
674 } else if (table->type == PTABLE_ISO9660)
677 #ifdef LOADER_VTOC8_SUPPORT
678 if (be16dec(buf + offsetof(struct vtoc8, magic)) == VTOC_MAGIC) {
679 if (ptable_vtoc8read(table, dev, dread) == NULL) {
683 } else if (table->type == PTABLE_VTOC8)
687 /* Check the BSD label. */
688 if (ptable_bsdread(table, dev, dread) == NULL) { /* Read error. */
691 } else if (table->type == PTABLE_BSD)
694 #if defined(LOADER_GPT_SUPPORT) || defined(LOADER_MBR_SUPPORT)
695 /* Check the MBR magic. */
696 if (buf[DOSMAGICOFFSET] != 0x55 ||
697 buf[DOSMAGICOFFSET + 1] != 0xaa) {
698 DPRINTF("magic sequence not found");
699 #if defined(LOADER_GPT_SUPPORT)
700 /* There is no PMBR, check that we have backup GPT */
701 table->type = PTABLE_GPT;
702 table = ptable_gptread(table, dev, dread);
706 /* Check that we have PMBR. Also do some validation. */
707 dp = (struct dos_partition *)(buf + DOSPARTOFF);
708 for (i = 0, count = 0; i < NDOSPART; i++) {
709 if (dp[i].dp_flag != 0 && dp[i].dp_flag != 0x80) {
710 DPRINTF("invalid partition flag %x", dp[i].dp_flag);
713 #ifdef LOADER_GPT_SUPPORT
714 if (dp[i].dp_typ == DOSPTYP_PMBR) {
715 table->type = PTABLE_GPT;
716 DPRINTF("PMBR detected");
719 if (dp[i].dp_typ != 0)
722 /* Do we have some invalid values? */
723 if (table->type == PTABLE_GPT && count > 1) {
724 if (dp[1].dp_typ != DOSPTYP_HFS) {
725 table->type = PTABLE_NONE;
726 DPRINTF("Incorrect PMBR, ignore it");
728 DPRINTF("Bootcamp detected");
731 #ifdef LOADER_GPT_SUPPORT
732 if (table->type == PTABLE_GPT) {
733 table = ptable_gptread(table, dev, dread);
737 #ifdef LOADER_MBR_SUPPORT
739 DPRINTF("MBR detected");
740 table->type = PTABLE_MBR;
741 for (i = has_ext = 0; i < NDOSPART; i++) {
742 if (dp[i].dp_typ == 0)
744 start = le32dec(&(dp[i].dp_start));
745 end = le32dec(&(dp[i].dp_size));
746 if (start == 0 || end == 0)
748 #if 0 /* Some BIOSes return an incorrect number of sectors */
749 if (start + end - 1 >= sectors)
750 continue; /* XXX: ignore */
752 if (dp[i].dp_typ == DOSPTYP_EXT ||
753 dp[i].dp_typ == DOSPTYP_EXTLBA)
755 entry = malloc(sizeof(*entry));
758 entry->part.start = start;
759 entry->part.end = start + end - 1;
760 entry->part.index = i + 1;
761 entry->part.type = mbr_parttype(dp[i].dp_typ);
762 entry->flags = dp[i].dp_flag;
763 entry->type.mbr = dp[i].dp_typ;
764 STAILQ_INSERT_TAIL(&table->entries, entry, entry);
765 DPRINTF("new MBR partition added");
768 table = ptable_ebrread(table, dev, dread);
771 #endif /* LOADER_MBR_SUPPORT */
772 #endif /* LOADER_MBR_SUPPORT || LOADER_GPT_SUPPORT */
779 ptable_close(struct ptable *table)
781 struct pentry *entry;
786 while (!STAILQ_EMPTY(&table->entries)) {
787 entry = STAILQ_FIRST(&table->entries);
788 STAILQ_REMOVE_HEAD(&table->entries, entry);
795 ptable_gettype(const struct ptable *table)
798 return (table->type);
802 ptable_getsize(const struct ptable *table, uint64_t *sizep)
804 uint64_t tmp = table->sectors * table->sectorsize;
806 if (tmp < table->sectors)
815 ptable_getpart(const struct ptable *table, struct ptable_entry *part, int index)
817 struct pentry *entry;
819 if (part == NULL || table == NULL)
822 STAILQ_FOREACH(entry, &table->entries, entry) {
823 if (entry->part.index != index)
825 memcpy(part, &entry->part, sizeof(*part));
832 * Search for a slice with the following preferences:
834 * 1: Active FreeBSD slice
835 * 2: Non-active FreeBSD slice
836 * 3: Active Linux slice
837 * 4: non-active Linux slice
838 * 5: Active FAT/FAT32 slice
839 * 6: non-active FAT/FAT32 slice
841 #define PREF_RAWDISK 0
842 #define PREF_FBSD_ACT 1
844 #define PREF_LINUX_ACT 3
846 #define PREF_DOS_ACT 5
850 ptable_getbestpart(const struct ptable *table, struct ptable_entry *part)
852 struct pentry *entry, *best;
855 if (part == NULL || table == NULL)
859 preflevel = pref = PREF_NONE;
860 STAILQ_FOREACH(entry, &table->entries, entry) {
861 #ifdef LOADER_MBR_SUPPORT
862 if (table->type == PTABLE_MBR) {
863 switch (entry->type.mbr) {
865 pref = entry->flags & 0x80 ? PREF_FBSD_ACT:
869 pref = entry->flags & 0x80 ? PREF_LINUX_ACT:
872 case 0x01: /* DOS/Windows */
878 pref = entry->flags & 0x80 ? PREF_DOS_ACT:
885 #endif /* LOADER_MBR_SUPPORT */
886 #ifdef LOADER_GPT_SUPPORT
887 if (table->type == PTABLE_GPT) {
888 if (entry->part.type == PART_DOS)
890 else if (entry->part.type == PART_FREEBSD_UFS ||
891 entry->part.type == PART_FREEBSD_ZFS)
896 #endif /* LOADER_GPT_SUPPORT */
897 if (pref < preflevel) {
903 memcpy(part, &best->part, sizeof(*part));
910 ptable_iterate(const struct ptable *table, void *arg, ptable_iterate_t *iter)
912 struct pentry *entry;
917 STAILQ_FOREACH(entry, &table->entries, entry) {
918 #ifdef LOADER_MBR_SUPPORT
919 if (table->type == PTABLE_MBR)
920 sprintf(name, "s%d", entry->part.index);
923 #ifdef LOADER_GPT_SUPPORT
924 if (table->type == PTABLE_GPT)
925 sprintf(name, "p%d", entry->part.index);
928 #ifdef LOADER_VTOC8_SUPPORT
929 if (table->type == PTABLE_VTOC8)
930 sprintf(name, "%c", (uint8_t) 'a' +
934 if (table->type == PTABLE_BSD)
935 sprintf(name, "%c", (uint8_t) 'a' +
937 if ((ret = iter(arg, name, &entry->part)) != 0)