Date: Sun, 5 Aug 2012 11:29:44 +0000 (UTC) From: "Andrey V. Elsukov" <ae@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r239054 - head/sys/boot/common Message-ID: <201208051129.q75BTilo077967@svn.freebsd.org>
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Author: ae Date: Sun Aug 5 11:29:44 2012 New Revision: 239054 URL: http://svn.freebsd.org/changeset/base/239054 Log: Create the interface to work with various partition tables from the loader(8). The following partition tables are supported: BSD label, GPT, MBR, EBR and VTOC8. Added: head/sys/boot/common/part.c (contents, props changed) head/sys/boot/common/part.h (contents, props changed) Added: head/sys/boot/common/part.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/boot/common/part.c Sun Aug 5 11:29:44 2012 (r239054) @@ -0,0 +1,839 @@ +/*- + * Copyright (c) 2012 Andrey V. Elsukov <ae@FreeBSD.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <stand.h> +#include <sys/param.h> +#include <sys/diskmbr.h> +#include <sys/disklabel.h> +#include <sys/endian.h> +#include <sys/gpt.h> +#include <sys/stddef.h> +#include <sys/queue.h> +#include <sys/vtoc.h> + +#include <crc32.h> +#include <part.h> +#include <uuid.h> + +#ifdef PART_DEBUG +#define DEBUG(fmt, args...) printf("%s: " fmt "\n" , __func__ , ## args) +#else +#define DEBUG(fmt, args...) +#endif + +#ifdef LOADER_GPT_SUPPORT +#define MAXTBLSZ 64 +static const uuid_t gpt_uuid_unused = GPT_ENT_TYPE_UNUSED; +static const uuid_t gpt_uuid_ms_basic_data = GPT_ENT_TYPE_MS_BASIC_DATA; +static const uuid_t gpt_uuid_freebsd_ufs = GPT_ENT_TYPE_FREEBSD_UFS; +static const uuid_t gpt_uuid_efi = GPT_ENT_TYPE_EFI; +static const uuid_t gpt_uuid_freebsd_boot = GPT_ENT_TYPE_FREEBSD_BOOT; +static const uuid_t gpt_uuid_freebsd_nandfs = GPT_ENT_TYPE_FREEBSD_NANDFS; +static const uuid_t gpt_uuid_freebsd_swap = GPT_ENT_TYPE_FREEBSD_SWAP; +static const uuid_t gpt_uuid_freebsd_zfs = GPT_ENT_TYPE_FREEBSD_ZFS; +static const uuid_t gpt_uuid_freebsd_vinum = GPT_ENT_TYPE_FREEBSD_VINUM; +#endif + +struct pentry { + struct ptable_entry part; + uint64_t flags; + union { + uint8_t bsd; + uint8_t mbr; + uuid_t gpt; + uint16_t vtoc8; + } type; + STAILQ_ENTRY(pentry) entry; +}; + +struct ptable { + enum ptable_type type; + uint16_t sectorsize; + uint64_t sectors; + + STAILQ_HEAD(, pentry) entries; +}; + +static struct parttypes { + enum partition_type type; + const char *desc; +} ptypes[] = { + { PART_UNKNOWN, "Unknown" }, + { PART_EFI, "EFI" }, + { PART_FREEBSD, "FreeBSD" }, + { PART_FREEBSD_BOOT, "FreeBSD boot" }, + { PART_FREEBSD_NANDFS, "FreeBSD nandfs" }, + { PART_FREEBSD_UFS, "FreeBSD UFS" }, + { PART_FREEBSD_ZFS, "FreeBSD ZFS" }, + { PART_FREEBSD_SWAP, "FreeBSD swap" }, + { PART_FREEBSD_VINUM, "FreeBSD vinum" }, + { PART_LINUX, "Linux" }, + { PART_LINUX_SWAP, "Linux swap" }, + { PART_DOS, "DOS/Windows" }, +}; + +const char * +parttype2str(enum partition_type type) +{ + int i; + + for (i = 0; i < sizeof(ptypes) / sizeof(ptypes[0]); i++) + if (ptypes[i].type == type) + return (ptypes[i].desc); + return (ptypes[0].desc); +} + +#ifdef LOADER_GPT_SUPPORT +static void +uuid_letoh(uuid_t *uuid) +{ + + uuid->time_low = le32toh(uuid->time_low); + uuid->time_mid = le16toh(uuid->time_mid); + uuid->time_hi_and_version = le16toh(uuid->time_hi_and_version); +} + +static enum partition_type +gpt_parttype(uuid_t type) +{ + + if (uuid_equal(&type, &gpt_uuid_efi, NULL)) + return (PART_EFI); + else if (uuid_equal(&type, &gpt_uuid_ms_basic_data, NULL)) + return (PART_DOS); + else if (uuid_equal(&type, &gpt_uuid_freebsd_boot, NULL)) + return (PART_FREEBSD_BOOT); + else if (uuid_equal(&type, &gpt_uuid_freebsd_ufs, NULL)) + return (PART_FREEBSD_UFS); + else if (uuid_equal(&type, &gpt_uuid_freebsd_zfs, NULL)) + return (PART_FREEBSD_ZFS); + else if (uuid_equal(&type, &gpt_uuid_freebsd_swap, NULL)) + return (PART_FREEBSD_SWAP); + else if (uuid_equal(&type, &gpt_uuid_freebsd_vinum, NULL)) + return (PART_FREEBSD_VINUM); + else if (uuid_equal(&type, &gpt_uuid_freebsd_nandfs, NULL)) + return (PART_FREEBSD_NANDFS); + return (PART_UNKNOWN); +} + +static struct gpt_hdr* +gpt_checkhdr(struct gpt_hdr *hdr, uint64_t lba_self, uint64_t lba_last, + uint16_t sectorsize) +{ + uint32_t sz, crc; + + if (memcmp(hdr->hdr_sig, GPT_HDR_SIG, sizeof(hdr->hdr_sig)) != 0) { + DEBUG("no GPT signature"); + return (NULL); + } + sz = le32toh(hdr->hdr_size); + if (sz < 92 || sz > sectorsize) { + DEBUG("invalid GPT header size: %d", sz); + return (NULL); + } + crc = le32toh(hdr->hdr_crc_self); + hdr->hdr_crc_self = 0; + if (crc32(hdr, sz) != crc) { + DEBUG("GPT header's CRC doesn't match"); + return (NULL); + } + hdr->hdr_crc_self = crc; + hdr->hdr_revision = le32toh(hdr->hdr_revision); + if (hdr->hdr_revision < GPT_HDR_REVISION) { + DEBUG("unsupported GPT revision %d", hdr->hdr_revision); + return (NULL); + } + hdr->hdr_lba_self = le64toh(hdr->hdr_lba_self); + if (hdr->hdr_lba_self != lba_self) { + DEBUG("self LBA doesn't match"); + return (NULL); + } + hdr->hdr_lba_alt = le64toh(hdr->hdr_lba_alt); + if (hdr->hdr_lba_alt == hdr->hdr_lba_self) { + DEBUG("invalid alternate LBA"); + return (NULL); + } + hdr->hdr_entries = le32toh(hdr->hdr_entries); + hdr->hdr_entsz = le32toh(hdr->hdr_entsz); + if (hdr->hdr_entries < 128 || + hdr->hdr_entsz < sizeof(struct gpt_ent) || + sectorsize % hdr->hdr_entsz != 0) { + DEBUG("invalid entry size or number of entries"); + return (NULL); + } + hdr->hdr_lba_start = le64toh(hdr->hdr_lba_start); + hdr->hdr_lba_end = le64toh(hdr->hdr_lba_end); + hdr->hdr_lba_table = le64toh(hdr->hdr_lba_table); + hdr->hdr_crc_table = le32toh(hdr->hdr_crc_table); + uuid_letoh(&hdr->hdr_uuid); + return (hdr); +} + +static int +gpt_checktbl(const struct gpt_hdr *hdr, u_char *tbl, size_t size, + uint64_t lba_last) +{ + struct gpt_ent *ent; + int i, cnt; + + cnt = size / hdr->hdr_entsz; + /* Check CRC only when buffer size is enough for table. */ + if (hdr->hdr_entries <= cnt && + crc32(tbl, size) != hdr->hdr_crc_table) { + DEBUG("GPT table's CRC doesn't match"); + return (-1); + } + ent = (struct gpt_ent *)tbl; + for (i = 0; i < cnt; i++, ent++) { + uuid_letoh(&ent->ent_type); + if (uuid_equal(&ent->ent_type, &gpt_uuid_unused, NULL)) + continue; + ent->ent_lba_start = le64toh(ent->ent_lba_start); + ent->ent_lba_end = le64toh(ent->ent_lba_end); + } + return (0); +} + +static struct ptable* +ptable_gptread(struct ptable *table, void *dev, diskread_t dread) +{ + struct pentry *entry; + struct gpt_hdr *phdr, hdr; + struct gpt_ent *ent; + u_char *buf, *tbl; + uint64_t offset; + int pri, sec, i; + size_t size; + + buf = malloc(table->sectorsize); + if (buf == NULL) + return (NULL); + tbl = malloc(table->sectorsize * MAXTBLSZ); + if (tbl == NULL) { + free(buf); + return (NULL); + } + /* Read the primary GPT header. */ + if (dread(dev, buf, 1, 1) != 0) { + ptable_close(table); + table = NULL; + goto out; + } + pri = sec = 0; + /* Check the primary GPT header. */ + phdr = gpt_checkhdr((struct gpt_hdr *)buf, 1, table->sectors - 1, + table->sectorsize); + if (phdr != NULL) { + /* Read the primary GPT table. */ + size = MIN(MAXTBLSZ, + phdr->hdr_entries * phdr->hdr_entsz / table->sectorsize); + if (dread(dev, tbl, size, phdr->hdr_lba_table) == 0 && + gpt_checktbl(phdr, tbl, size * table->sectorsize, + table->sectors - 1) == 0) { + memcpy(&hdr, phdr, sizeof(hdr)); + pri = 1; + } + } + offset = pri ? hdr.hdr_lba_alt: table->sectors - 1; + /* Read the backup GPT header. */ + if (dread(dev, buf, 1, offset) != 0) + phdr = NULL; + else + phdr = gpt_checkhdr((struct gpt_hdr *)buf, offset, + table->sectors - 1, table->sectorsize); + if (phdr != NULL) { + /* + * Compare primary and backup headers. + * If they are equal, then we do not need to read backup + * table. If they are different, then prefer backup header + * and try to read backup table. + */ + if (pri == 0 || + uuid_equal(&hdr.hdr_uuid, &phdr->hdr_uuid, NULL) == 0 || + hdr.hdr_revision != phdr->hdr_revision || + hdr.hdr_size != phdr->hdr_size || + hdr.hdr_lba_start != phdr->hdr_lba_start || + hdr.hdr_lba_end != phdr->hdr_lba_end || + hdr.hdr_entries != phdr->hdr_entries || + hdr.hdr_entsz != phdr->hdr_entsz || + hdr.hdr_crc_table != phdr->hdr_crc_table) { + /* Read the backup GPT table. */ + size = MIN(MAXTBLSZ, phdr->hdr_entries * + phdr->hdr_entsz / table->sectorsize); + if (dread(dev, tbl, size, phdr->hdr_lba_table) == 0 && + gpt_checktbl(phdr, tbl, size * table->sectorsize, + table->sectors - 1) == 0) { + memcpy(&hdr, phdr, sizeof(hdr)); + sec = 1; + } + } + } + if (pri == 0 && sec == 0) { + /* Both primary and backup tables are invalid. */ + table->type = PTABLE_NONE; + goto out; + } + ent = (struct gpt_ent *)tbl; + size = MIN(hdr.hdr_entries * hdr.hdr_entsz, + MAXTBLSZ * table->sectorsize); + for (i = 0; i < size / hdr.hdr_entsz; i++, ent++) { + if (uuid_equal(&ent->ent_type, &gpt_uuid_unused, NULL)) + continue; + entry = malloc(sizeof(*entry)); + if (entry == NULL) + break; + entry->part.start = ent->ent_lba_start; + entry->part.end = ent->ent_lba_end; + entry->part.index = i + 1; + entry->part.type = gpt_parttype(ent->ent_type); + entry->flags = le64toh(ent->ent_attr); + memcpy(&entry->type.gpt, &ent->ent_type, sizeof(uuid_t)); + STAILQ_INSERT_TAIL(&table->entries, entry, entry); + DEBUG("new GPT partition added"); + } +out: + free(buf); + free(tbl); + return (table); +} +#endif /* LOADER_GPT_SUPPORT */ + +#ifdef LOADER_MBR_SUPPORT +/* We do not need to support too many EBR partitions in the loader */ +#define MAXEBRENTRIES 8 +static enum partition_type +mbr_parttype(uint8_t type) +{ + + switch (type) { + case DOSPTYP_386BSD: + return (PART_FREEBSD); + case DOSPTYP_LINSWP: + return (PART_LINUX_SWAP); + case DOSPTYP_LINUX: + return (PART_LINUX); + case 0x01: + case 0x04: + case 0x06: + case 0x07: + case 0x0b: + case 0x0c: + case 0x0e: + return (PART_DOS); + } + return (PART_UNKNOWN); +} + +struct ptable* +ptable_ebrread(struct ptable *table, void *dev, diskread_t dread) +{ + struct dos_partition *dp; + struct pentry *e1, *entry; + uint32_t start, end, offset; + u_char *buf; + int i, index; + + STAILQ_FOREACH(e1, &table->entries, entry) { + if (e1->type.mbr == DOSPTYP_EXT || + e1->type.mbr == DOSPTYP_EXTLBA) + break; + } + if (e1 == NULL) + return (table); + index = 5; + offset = e1->part.start; + buf = malloc(table->sectorsize); + if (buf == NULL) + return (table); + for (i = 0; i < MAXEBRENTRIES; i++) { + if (offset >= table->sectors) + break; + if (dread(dev, buf, 1, offset) != 0) + break; + dp = (struct dos_partition *)(buf + DOSPARTOFF); + if (dp[0].dp_typ == 0) + break; + start = le32toh(dp[0].dp_start); + if (dp[0].dp_typ == DOSPTYP_EXT && + dp[1].dp_typ == 0) { + offset = e1->part.start + start; + continue; + } + end = le32toh(dp[0].dp_size); + entry = malloc(sizeof(*entry)); + if (entry == NULL) + break; + entry->part.start = e1->part.start + start; + entry->part.end = entry->part.start + end - 1; + entry->part.index = index++; + entry->part.type = mbr_parttype(dp[0].dp_typ); + entry->flags = dp[0].dp_flag; + entry->type.mbr = dp[0].dp_typ; + STAILQ_INSERT_TAIL(&table->entries, entry, entry); + DEBUG("new EBR partition added"); + if (dp[1].dp_typ == 0) + break; + offset = e1->part.start + le32toh(dp[1].dp_start); + } + free(buf); + return (table); +} +#endif /* LOADER_MBR_SUPPORT */ + +static enum partition_type +bsd_parttype(uint8_t type) +{ + + switch (type) { + case FS_NANDFS: + return (PART_FREEBSD_NANDFS); + case FS_SWAP: + return (PART_FREEBSD_SWAP); + case FS_BSDFFS: + return (PART_FREEBSD_UFS); + case FS_VINUM: + return (PART_FREEBSD_VINUM); + case FS_ZFS: + return (PART_FREEBSD_ZFS); + } + return (PART_UNKNOWN); +} + +struct ptable* +ptable_bsdread(struct ptable *table, void *dev, diskread_t dread) +{ + struct disklabel *dl; + struct partition *part; + struct pentry *entry; + u_char *buf; + uint32_t raw_offset; + int i; + + if (table->sectorsize < sizeof(struct disklabel)) { + DEBUG("Too small sectorsize"); + return (table); + } + buf = malloc(table->sectorsize); + if (buf == NULL) + return (table); + if (dread(dev, buf, 1, 1) != 0) { + DEBUG("read failed"); + ptable_close(table); + table = NULL; + goto out; + } + dl = (struct disklabel *)buf; + if (le32toh(dl->d_magic) != DISKMAGIC && + le32toh(dl->d_magic2) != DISKMAGIC) + goto out; + if (le32toh(dl->d_secsize) != table->sectorsize) { + DEBUG("unsupported sector size"); + goto out; + } + dl->d_npartitions = le16toh(dl->d_npartitions); + if (dl->d_npartitions > 20 || dl->d_npartitions < 8) { + DEBUG("invalid number of partitions"); + goto out; + } + part = &dl->d_partitions[0]; + raw_offset = le32toh(part[RAW_PART].p_offset); + for (i = 0; i < dl->d_npartitions; i++, part++) { + if (i == RAW_PART) + continue; + if (part->p_size == 0 || part->p_fstype == 0) + continue; + entry = malloc(sizeof(*entry)); + if (entry == NULL) + break; + entry->part.start = le32toh(part->p_offset) - raw_offset; + entry->part.end = entry->part.start + + le32toh(part->p_size) + 1; + entry->part.type = bsd_parttype(part->p_fstype); + entry->part.index = i; /* starts from zero */ + entry->type.bsd = part->p_fstype; + STAILQ_INSERT_TAIL(&table->entries, entry, entry); + DEBUG("new BSD partition added"); + } + table->type = PTABLE_BSD; +out: + free(buf); + return (table); +} + +#ifdef LOADER_VTOC8_SUPPORT +static enum partition_type +vtoc8_parttype(uint16_t type) +{ + + switch (type) { + case VTOC_TAG_FREEBSD_NANDFS: + return (PART_FREEBSD_NANDFS); + case VTOC_TAG_FREEBSD_SWAP: + return (PART_FREEBSD_SWAP); + case VTOC_TAG_FREEBSD_UFS: + return (PART_FREEBSD_UFS); + case VTOC_TAG_FREEBSD_VINUM: + return (PART_FREEBSD_VINUM); + case VTOC_TAG_FREEBSD_ZFS: + return (PART_FREEBSD_ZFS); + }; + return (PART_UNKNOWN); +} + +static struct ptable* +ptable_vtoc8read(struct ptable *table, void *dev, diskread_t dread) +{ + struct pentry *entry; + struct vtoc8 *dl; + u_char *buf; + uint16_t sum, heads, sectors; + int i; + + if (table->sectorsize != sizeof(struct vtoc8)) + return (table); + buf = malloc(table->sectorsize); + if (buf == NULL) + return (table); + if (dread(dev, buf, 1, 0) != 0) { + DEBUG("read failed"); + ptable_close(table); + table = NULL; + goto out; + } + dl = (struct vtoc8 *)buf; + /* Check the sum */ + for (i = sum = 0; i < sizeof(struct vtoc8); i += sizeof(sum)) + sum ^= be16dec(buf + i); + if (sum != 0) { + DEBUG("incorrect checksum"); + goto out; + } + if (be16toh(dl->nparts) != VTOC8_NPARTS) { + DEBUG("invalid number of entries"); + goto out; + } + sectors = be16toh(dl->nsecs); + heads = be16toh(dl->nheads); + if (sectors * heads == 0) { + DEBUG("invalid geometry"); + goto out; + } + for (i = 0; i < VTOC8_NPARTS; i++) { + dl->part[i].tag = be16toh(dl->part[i].tag); + if (i == VTOC_RAW_PART || + dl->part[i].tag == VTOC_TAG_UNASSIGNED) + continue; + entry = malloc(sizeof(*entry)); + if (entry == NULL) + break; + entry->part.start = be32toh(dl->map[i].cyl) * heads * sectors; + entry->part.end = be32toh(dl->map[i].nblks) + + entry->part.start - 1; + entry->part.type = vtoc8_parttype(dl->part[i].tag); + entry->part.index = i; /* starts from zero */ + entry->type.vtoc8 = dl->part[i].tag; + STAILQ_INSERT_TAIL(&table->entries, entry, entry); + DEBUG("new VTOC8 partition added"); + } + table->type = PTABLE_VTOC8; +out: + free(buf); + return (table); + +} +#endif /* LOADER_VTOC8_SUPPORT */ + +struct ptable* +ptable_open(void *dev, off_t sectors, uint16_t sectorsize, + diskread_t *dread) +{ + struct dos_partition *dp; + struct ptable *table; + u_char *buf; + int i, count; +#ifdef LOADER_MBR_SUPPORT + struct pentry *entry; + uint32_t start, end; + int has_ext; +#endif + table = NULL; + buf = malloc(sectorsize); + if (buf == NULL) + return (NULL); + /* First, read the MBR. */ + if (dread(dev, buf, 1, DOSBBSECTOR) != 0) { + DEBUG("read failed"); + goto out; + } + + table = malloc(sizeof(*table)); + if (table == NULL) + goto out; + table->sectors = sectors; + table->sectorsize = sectorsize; + table->type = PTABLE_NONE; + STAILQ_INIT(&table->entries); + +#ifdef LOADER_VTOC8_SUPPORT + if (be16dec(buf + offsetof(struct vtoc8, magic)) == VTOC_MAGIC) { + if (ptable_vtoc8read(table, dev, dread) == NULL) { + /* Read error. */ + table = NULL; + goto out; + } else if (table->type == PTABLE_VTOC8) + goto out; + } +#endif + /* Check the BSD label. */ + if (ptable_bsdread(table, dev, dread) == NULL) { /* Read error. */ + table = NULL; + goto out; + } else if (table->type == PTABLE_BSD) + goto out; + +#if defined(LOADER_GPT_SUPPORT) || defined(LOADER_MBR_SUPPORT) + /* Check the MBR magic. */ + if (buf[DOSMAGICOFFSET] != 0x55 || + buf[DOSMAGICOFFSET + 1] != 0xaa) { + DEBUG("magic sequence not found"); + goto out; + } + /* Check that we have PMBR. Also do some validation. */ + dp = (struct dos_partition *)(buf + DOSPARTOFF); + for (i = 0, count = 0; i < NDOSPART; i++) { + if (dp[i].dp_flag != 0 && dp[i].dp_flag != 0x80) { + DEBUG("invalid partition flag %x", dp[i].dp_flag); + break; + } +#ifdef LOADER_GPT_SUPPORT + if (dp[i].dp_typ == DOSPTYP_PMBR) { + table->type = PTABLE_GPT; + DEBUG("PMBR detected"); + } +#endif + if (dp[i].dp_typ != 0) + count++; + } + /* Do we have some invalid values? */ + if (i != NDOSPART || + (table->type == PTABLE_GPT && count > 1)) { + table->type = PTABLE_NONE; + DEBUG("invalid values detected, ignore partition table"); + goto out; + } +#ifdef LOADER_GPT_SUPPORT + if (table->type == PTABLE_GPT) { + table = ptable_gptread(table, dev, dread); + goto out; + } +#endif +#ifdef LOADER_MBR_SUPPORT + /* Read MBR. */ + table->type = PTABLE_MBR; + for (i = has_ext = 0; i < NDOSPART; i++) { + if (dp[i].dp_typ == 0) + continue; + start = le32toh(dp[i].dp_start); + end = le32toh(dp[i].dp_size); + if (start == 0 || end == 0) + continue; + if (start + end - 1 >= sectors) + continue; /* XXX: ignore */ + if (dp[i].dp_typ == DOSPTYP_EXT || + dp[i].dp_typ == DOSPTYP_EXTLBA) + has_ext = 1; + entry = malloc(sizeof(*entry)); + if (entry == NULL) + break; + entry->part.start = start; + entry->part.end = start + end - 1; + entry->part.index = i + 1; + entry->part.type = mbr_parttype(dp[i].dp_typ); + entry->flags = dp[i].dp_flag; + entry->type.mbr = dp[i].dp_typ; + STAILQ_INSERT_TAIL(&table->entries, entry, entry); + DEBUG("new MBR partition added"); + } + if (has_ext) { + table = ptable_ebrread(table, dev, dread); + /* FALLTHROUGH */ + } +#endif /* LOADER_MBR_SUPPORT */ +#endif /* LOADER_MBR_SUPPORT || LOADER_GPT_SUPPORT */ +out: + free(buf); + return (table); +} + +void +ptable_close(struct ptable *table) +{ + struct pentry *entry; + + while (!STAILQ_EMPTY(&table->entries)) { + entry = STAILQ_FIRST(&table->entries); + STAILQ_REMOVE_HEAD(&table->entries, entry); + free(entry); + } + free(table); +} + +enum ptable_type +ptable_gettype(const struct ptable *table) +{ + + return (table->type); +} + +int +ptable_getpart(const struct ptable *table, struct ptable_entry *part, int index) +{ + struct pentry *entry; + + if (part == NULL || table == NULL) + return (EINVAL); + + STAILQ_FOREACH(entry, &table->entries, entry) { + if (entry->part.index != index) + continue; + memcpy(part, &entry->part, sizeof(*part)); + return (0); + } + return (ENOENT); +} + +/* + * Search for a slice with the following preferences: + * + * 1: Active FreeBSD slice + * 2: Non-active FreeBSD slice + * 3: Active Linux slice + * 4: non-active Linux slice + * 5: Active FAT/FAT32 slice + * 6: non-active FAT/FAT32 slice + */ +#define PREF_RAWDISK 0 +#define PREF_FBSD_ACT 1 +#define PREF_FBSD 2 +#define PREF_LINUX_ACT 3 +#define PREF_LINUX 4 +#define PREF_DOS_ACT 5 +#define PREF_DOS 6 +#define PREF_NONE 7 +int +ptable_getbestpart(const struct ptable *table, struct ptable_entry *part) +{ + struct pentry *entry, *best; + int pref, preflevel; + + if (part == NULL || table == NULL) + return (EINVAL); + + best = NULL; + preflevel = pref = PREF_NONE; + STAILQ_FOREACH(entry, &table->entries, entry) { +#ifdef LOADER_MBR_SUPPORT + if (table->type == PTABLE_MBR) { + switch (entry->type.mbr) { + case DOSPTYP_386BSD: + pref = entry->flags & 0x80 ? PREF_FBSD_ACT: + PREF_FBSD; + break; + case DOSPTYP_LINUX: + pref = entry->flags & 0x80 ? PREF_LINUX_ACT: + PREF_LINUX; + break; + case 0x01: /* DOS/Windows */ + case 0x04: + case 0x06: + case 0x0c: + case 0x0e: + case DOSPTYP_FAT32: + pref = entry->flags & 0x80 ? PREF_DOS_ACT: + PREF_DOS; + break; + default: + pref = PREF_NONE; + } + } +#endif /* LOADER_MBR_SUPPORT */ +#ifdef LOADER_GPT_SUPPORT + if (table->type == PTABLE_GPT) { + if (entry->part.type == PART_DOS) + pref = PREF_DOS; + else if (entry->part.type == PART_FREEBSD_UFS || + entry->part.type == PART_FREEBSD_ZFS) + pref = PREF_FBSD; + else + pref = PREF_NONE; + } +#endif /* LOADER_GPT_SUPPORT */ + if (pref < preflevel) { + preflevel = pref; + best = entry; + } + } + if (best != NULL) { + memcpy(part, &best->part, sizeof(*part)); + return (0); + } + return (ENOENT); +} + +void +ptable_iterate(const struct ptable *table, void *arg, ptable_iterate_t *iter) +{ + struct pentry *entry; + char name[32]; + + name[0] = '\0'; + STAILQ_FOREACH(entry, &table->entries, entry) { +#ifdef LOADER_MBR_SUPPORT + if (table->type == PTABLE_MBR) + sprintf(name, "s%d", entry->part.index); + else +#endif +#ifdef LOADER_GPT_SUPPORT + if (table->type == PTABLE_GPT) + sprintf(name, "p%d", entry->part.index); + else +#endif +#ifdef LOADER_VTOC8_SUPPORT + if (table->type == PTABLE_VTOC8) + sprintf(name, "%c", (u_char) 'a' + + entry->part.index); + else +#endif + if (table->type == PTABLE_BSD) + sprintf(name, "%c", (u_char) 'a' + + entry->part.index); + iter(arg, name, &entry->part); + } +} + Added: head/sys/boot/common/part.h ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/boot/common/part.h Sun Aug 5 11:29:44 2012 (r239054) @@ -0,0 +1,82 @@ +/*- + * Copyright (c) 2012 Andrey V. Elsukov <ae@FreeBSD.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _PART_H_ +#define _PART_H_ + +struct ptable; + +enum ptable_type { + PTABLE_NONE, + PTABLE_BSD, + PTABLE_MBR, + PTABLE_GPT, + PTABLE_VTOC8 +}; + +enum partition_type { + PART_UNKNOWN, + PART_EFI, + PART_FREEBSD, + PART_FREEBSD_BOOT, + PART_FREEBSD_NANDFS, + PART_FREEBSD_UFS, + PART_FREEBSD_ZFS, + PART_FREEBSD_SWAP, + PART_FREEBSD_VINUM, + PART_LINUX, + PART_LINUX_SWAP, + PART_DOS, +}; + +struct ptable_entry { + uint64_t start; + uint64_t end; + int index; + enum partition_type type; +}; + +/* The offset and size are in sectors */ +typedef int (diskread_t)(void *arg, void *buf, size_t blocks, off_t offset); +typedef void (ptable_iterate_t)(void *arg, const char *partname, + const struct ptable_entry *part); + +struct ptable *ptable_open(void *dev, off_t sectors, uint16_t sectorsize, + diskread_t *dread); +void ptable_close(struct ptable *table); +enum ptable_type ptable_gettype(const struct ptable *table); + +int ptable_getpart(const struct ptable *table, struct ptable_entry *part, + int index); +int ptable_getbestpart(const struct ptable *table, struct ptable_entry *part); + +void ptable_iterate(const struct ptable *table, void *arg, + ptable_iterate_t *iter); +const char *parttype2str(enum partition_type type); + +#endif /* !_PART_H_ */
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