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583 lines
15 KiB
C
583 lines
15 KiB
C
/*
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* ptgen - partition table generator
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* Copyright (C) 2006 by Felix Fietkau <nbd@nbd.name>
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*
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* uses parts of afdisk
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* Copyright (C) 2002 by David Roetzel <david@roetzel.de>
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*
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* UUID/GUID definition stolen from kernel/include/uapi/linux/uuid.h
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* Copyright (C) 2010, Intel Corp. Huang Ying <ying.huang@intel.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <ctype.h>
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#include <inttypes.h>
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#include <fcntl.h>
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#include <stdint.h>
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#include "cyg_crc.h"
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#if __BYTE_ORDER == __BIG_ENDIAN
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#define cpu_to_le16(x) bswap_16(x)
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#define cpu_to_le32(x) bswap_32(x)
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#define cpu_to_le64(x) bswap_64(x)
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#elif __BYTE_ORDER == __LITTLE_ENDIAN
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#define cpu_to_le16(x) (x)
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#define cpu_to_le32(x) (x)
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#define cpu_to_le64(x) (x)
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#else
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#error unknown endianness!
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#endif
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#define swap(a, b) \
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do { typeof(a) __tmp = (a); (a) = (b); (b) = __tmp; } while (0)
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typedef struct {
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uint8_t b[16];
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} guid_t;
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#define GUID_INIT(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
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((guid_t) \
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{{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
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(b) & 0xff, ((b) >> 8) & 0xff, \
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(c) & 0xff, ((c) >> 8) & 0xff, \
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(d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
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#define GUID_STRING_LENGTH 36
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#define GPT_SIGNATURE 0x5452415020494645ULL
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#define GPT_REVISION 0x00010000
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#define GUID_PARTITION_SYSTEM \
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GUID_INIT( 0xC12A7328, 0xF81F, 0x11d2, \
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0xBA, 0x4B, 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B)
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#define GUID_PARTITION_BASIC_DATA \
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GUID_INIT( 0xEBD0A0A2, 0xB9E5, 0x4433, \
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0x87, 0xC0, 0x68, 0xB6, 0xB7, 0x26, 0x99, 0xC7)
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#define GUID_PARTITION_BIOS_BOOT \
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GUID_INIT( 0x21686148, 0x6449, 0x6E6F, \
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0x74, 0x4E, 0x65, 0x65, 0x64, 0x45, 0x46, 0x49)
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#define GPT_HEADER_SIZE 92
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#define GPT_ENTRY_SIZE 128
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#define GPT_ENTRY_MAX 128
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#define GPT_ENTRY_NAME_SIZE 72
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#define GPT_HEADER_SECTOR 1
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#define GPT_FIRST_ENTRY_SECTOR 2
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#define MBR_ENTRY_MAX 4
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#define MBR_DISK_SIGNATURE_OFFSET 440
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#define MBR_PARTITION_ENTRY_OFFSET 446
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#define MBR_BOOT_SIGNATURE_OFFSET 510
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#define DISK_SECTOR_SIZE 512
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/* Partition table entry */
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struct pte {
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uint8_t active;
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uint8_t chs_start[3];
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uint8_t type;
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uint8_t chs_end[3];
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uint32_t start;
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uint32_t length;
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};
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struct partinfo {
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unsigned long start;
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unsigned long size;
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int type;
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};
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/* GPT Partition table header */
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struct gpth {
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uint64_t signature;
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uint32_t revision;
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uint32_t size;
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uint32_t crc32;
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uint32_t reserved;
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uint64_t self;
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uint64_t alternate;
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uint64_t first_usable;
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uint64_t last_usable;
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guid_t disk_guid;
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uint64_t first_entry;
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uint32_t entry_num;
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uint32_t entry_size;
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uint32_t entry_crc32;
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} __attribute__((packed));
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/* GPT Partition table entry */
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struct gpte {
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guid_t type;
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guid_t guid;
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uint64_t start;
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uint64_t end;
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uint64_t attr;
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char name[GPT_ENTRY_NAME_SIZE];
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} __attribute__((packed));
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int verbose = 0;
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int active = 1;
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int heads = -1;
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int sectors = -1;
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int kb_align = 0;
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bool ignore_null_sized_partition = false;
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bool use_guid_partition_table = false;
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struct partinfo parts[GPT_ENTRY_MAX];
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char *filename = NULL;
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/*
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* parse the size argument, which is either
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* a simple number (K assumed) or
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* K, M or G
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*
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* returns the size in KByte
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*/
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static long to_kbytes(const char *string)
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{
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int exp = 0;
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long result;
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char *end;
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result = strtoul(string, &end, 0);
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switch (tolower(*end)) {
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case 'k' :
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case '\0' : exp = 0; break;
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case 'm' : exp = 1; break;
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case 'g' : exp = 2; break;
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default: return 0;
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}
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if (*end)
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end++;
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if (*end) {
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fputs("garbage after end of number\n", stderr);
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return 0;
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}
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/* result: number + 1024^(exp) */
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if (exp == 0)
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return result;
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return result * (2 << ((10 * exp) - 1));
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}
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/* convert the sector number into a CHS value for the partition table */
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static void to_chs(long sect, unsigned char chs[3])
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{
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int c,h,s;
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s = (sect % sectors) + 1;
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sect = sect / sectors;
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h = sect % heads;
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sect = sect / heads;
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c = sect;
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chs[0] = h;
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chs[1] = s | ((c >> 2) & 0xC0);
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chs[2] = c & 0xFF;
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return;
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}
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/* round the sector number up to the next cylinder */
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static inline unsigned long round_to_cyl(long sect)
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{
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int cyl_size = heads * sectors;
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return sect + cyl_size - (sect % cyl_size);
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}
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/* round the sector number up to the kb_align boundary */
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static inline unsigned long round_to_kb(long sect) {
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return ((sect - 1) / kb_align + 1) * kb_align;
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}
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/* Compute a CRC for guid partition table */
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static inline unsigned long gpt_crc32(void *buf, unsigned long len)
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{
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return cyg_crc32_accumulate(~0L, buf, len) ^ ~0L;
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}
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/* Parse a guid string to guid_t struct */
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static inline int guid_parse(char *buf, guid_t *guid)
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{
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char b[4] = {0};
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char *p = buf;
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unsigned i = 0;
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if (strnlen(buf, GUID_STRING_LENGTH) != GUID_STRING_LENGTH)
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return -1;
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for (i = 0; i < sizeof(guid_t); i++) {
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if (*p == '-')
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p++;
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if (*p == '\0')
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return -1;
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memcpy(b, p, 2);
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guid->b[i] = strtol(b, 0, 16);
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p += 2;
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}
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swap(guid->b[0], guid->b[3]);
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swap(guid->b[1], guid->b[2]);
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swap(guid->b[4], guid->b[5]);
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swap(guid->b[6], guid->b[7]);
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return 0;
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}
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/* init an utf-16 string from utf-8 string */
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static inline void init_utf16(char *str, uint16_t *buf, unsigned bufsize)
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{
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unsigned i, n = 0;
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for (i = 0; i < bufsize; i++) {
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if (str[n] == 0x00) {
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buf[i] = 0x00;
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return ;
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} else if ((str[n] & 0x80) == 0x00) {//0xxxxxxx
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buf[i] = cpu_to_le16(str[n++]);
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} else if ((str[n] & 0xE0) == 0xC0) {//110xxxxx
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buf[i] = cpu_to_le16((str[n] & 0x1F) << 6 | (str[n + 1] & 0x3F));
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n += 2;
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} else if ((str[n] & 0xF0) == 0xE0) {//1110xxxx
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buf[i] = cpu_to_le16((str[n] & 0x0F) << 12 | (str[n + 1] & 0x3F) << 6 | (str[n + 2] & 0x3F));
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n += 3;
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} else {
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buf[i] = cpu_to_le16('?');
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n++;
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}
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}
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}
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/* check the partition sizes and write the partition table */
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static int gen_ptable(uint32_t signature, int nr)
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{
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struct pte pte[MBR_ENTRY_MAX];
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unsigned long start, len, sect = 0;
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int i, fd, ret = -1;
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memset(pte, 0, sizeof(struct pte) * MBR_ENTRY_MAX);
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for (i = 0; i < nr; i++) {
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if (!parts[i].size) {
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if (ignore_null_sized_partition)
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continue;
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fprintf(stderr, "Invalid size in partition %d!\n", i);
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return ret;
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}
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pte[i].active = ((i + 1) == active) ? 0x80 : 0;
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pte[i].type = parts[i].type;
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start = sect + sectors;
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if (parts[i].start != 0) {
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if (parts[i].start * 2 < start) {
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fprintf(stderr, "Invalid start %ld for partition %d!\n",
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parts[i].start, i);
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return ret;
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}
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start = parts[i].start * 2;
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} else if (kb_align != 0) {
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start = round_to_kb(start);
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}
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pte[i].start = cpu_to_le32(start);
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sect = start + parts[i].size * 2;
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if (kb_align == 0)
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sect = round_to_cyl(sect);
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pte[i].length = cpu_to_le32(len = sect - start);
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to_chs(start, pte[i].chs_start);
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to_chs(start + len - 1, pte[i].chs_end);
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|
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if (verbose)
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fprintf(stderr, "Partition %d: start=%ld, end=%ld, size=%ld\n",
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i,
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(long)start * DISK_SECTOR_SIZE,
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(long)(start + len) * DISK_SECTOR_SIZE,
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(long)len * DISK_SECTOR_SIZE);
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printf("%ld\n", (long)start * DISK_SECTOR_SIZE);
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printf("%ld\n", (long)len * DISK_SECTOR_SIZE);
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}
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if ((fd = open(filename, O_WRONLY|O_CREAT|O_TRUNC, 0644)) < 0) {
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fprintf(stderr, "Can't open output file '%s'\n",filename);
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return ret;
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}
|
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|
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lseek(fd, MBR_DISK_SIGNATURE_OFFSET, SEEK_SET);
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if (write(fd, &signature, sizeof(signature)) != sizeof(signature)) {
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fputs("write failed.\n", stderr);
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goto fail;
|
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}
|
|
|
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lseek(fd, MBR_PARTITION_ENTRY_OFFSET, SEEK_SET);
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if (write(fd, pte, sizeof(struct pte) * MBR_ENTRY_MAX) != sizeof(struct pte) * MBR_ENTRY_MAX) {
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fputs("write failed.\n", stderr);
|
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goto fail;
|
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}
|
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lseek(fd, MBR_BOOT_SIGNATURE_OFFSET, SEEK_SET);
|
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if (write(fd, "\x55\xaa", 2) != 2) {
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fputs("write failed.\n", stderr);
|
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goto fail;
|
|
}
|
|
|
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ret = 0;
|
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fail:
|
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close(fd);
|
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return ret;
|
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}
|
|
|
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/* check the partition sizes and write the guid partition table */
|
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static int gen_gptable(uint32_t signature, guid_t guid, unsigned nr)
|
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{
|
|
struct pte pte;
|
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struct gpth gpth = {
|
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.signature = cpu_to_le64(GPT_SIGNATURE),
|
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.revision = cpu_to_le32(GPT_REVISION),
|
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.size = cpu_to_le32(GPT_HEADER_SIZE),
|
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.self = cpu_to_le64(GPT_HEADER_SECTOR),
|
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.first_usable = cpu_to_le64(GPT_FIRST_ENTRY_SECTOR + GPT_ENTRY_SIZE * GPT_ENTRY_MAX / DISK_SECTOR_SIZE),
|
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.first_entry = cpu_to_le64(GPT_FIRST_ENTRY_SECTOR),
|
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.disk_guid = guid,
|
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.entry_num = cpu_to_le32(GPT_ENTRY_MAX),
|
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.entry_size = cpu_to_le32(GPT_ENTRY_SIZE),
|
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};
|
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struct gpte gpte[GPT_ENTRY_MAX];
|
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uint64_t start, end, sect = 0;
|
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int fd, ret = -1;
|
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unsigned i;
|
|
|
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memset(gpte, 0, GPT_ENTRY_SIZE * GPT_ENTRY_MAX);
|
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for (i = 0; i < nr; i++) {
|
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if (!parts[i].size) {
|
|
if (ignore_null_sized_partition)
|
|
continue;
|
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fprintf(stderr, "Invalid size in partition %d!\n", i);
|
|
return ret;
|
|
}
|
|
start = sect + sectors;
|
|
if (parts[i].start != 0) {
|
|
if (parts[i].start * 2 < start) {
|
|
fprintf(stderr, "Invalid start %ld for partition %d!\n",
|
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parts[i].start, i);
|
|
return ret;
|
|
}
|
|
start = parts[i].start * 2;
|
|
} else if (kb_align != 0) {
|
|
start = round_to_kb(start);
|
|
}
|
|
gpte[i].start = cpu_to_le64(start);
|
|
|
|
sect = start + parts[i].size * 2;
|
|
if (kb_align == 0)
|
|
sect = round_to_cyl(sect);
|
|
gpte[i].end = cpu_to_le64(sect -1);
|
|
gpte[i].guid = guid;
|
|
gpte[i].guid.b[sizeof(guid_t) -1] += i + 1;
|
|
if (parts[i].type == 0xEF || (i + 1) == (unsigned)active) {
|
|
gpte[i].type = GUID_PARTITION_SYSTEM;
|
|
init_utf16("EFI System Partition", (uint16_t *)gpte[i].name, GPT_ENTRY_NAME_SIZE / sizeof(uint16_t));
|
|
} else {
|
|
gpte[i].type = GUID_PARTITION_BASIC_DATA;
|
|
}
|
|
|
|
if (verbose)
|
|
fprintf(stderr, "Partition %d: start=%" PRIu64 ", end=%" PRIu64 ", size=%" PRIu64 "\n",
|
|
i,
|
|
start * DISK_SECTOR_SIZE, sect * DISK_SECTOR_SIZE,
|
|
(sect - start) * DISK_SECTOR_SIZE);
|
|
printf("%" PRIu64 "\n", start * DISK_SECTOR_SIZE);
|
|
printf("%" PRIu64 "\n", (sect - start) * DISK_SECTOR_SIZE);
|
|
}
|
|
|
|
gpte[GPT_ENTRY_MAX - 1].start = cpu_to_le64(GPT_FIRST_ENTRY_SECTOR + GPT_ENTRY_SIZE * GPT_ENTRY_MAX / DISK_SECTOR_SIZE);
|
|
gpte[GPT_ENTRY_MAX - 1].end = cpu_to_le64((kb_align ? round_to_kb(sectors) : (unsigned long)sectors) - 1);
|
|
gpte[GPT_ENTRY_MAX - 1].type = GUID_PARTITION_BIOS_BOOT;
|
|
gpte[GPT_ENTRY_MAX - 1].guid = guid;
|
|
gpte[GPT_ENTRY_MAX - 1].guid.b[sizeof(guid_t) -1] += GPT_ENTRY_MAX;
|
|
|
|
end = sect + sectors - 1;
|
|
|
|
pte.type = 0xEE;
|
|
pte.start = cpu_to_le32(GPT_HEADER_SECTOR);
|
|
pte.length = cpu_to_le32(end);
|
|
to_chs(GPT_HEADER_SECTOR, pte.chs_start);
|
|
to_chs(end, pte.chs_end);
|
|
|
|
gpth.last_usable = cpu_to_le64(end - GPT_ENTRY_SIZE * GPT_ENTRY_MAX / DISK_SECTOR_SIZE - 1);
|
|
gpth.alternate = cpu_to_le64(end);
|
|
gpth.entry_crc32 = cpu_to_le32(gpt_crc32(gpte, GPT_ENTRY_SIZE * GPT_ENTRY_MAX));
|
|
gpth.crc32 = cpu_to_le32(gpt_crc32((char *)&gpth, GPT_HEADER_SIZE));
|
|
|
|
if ((fd = open(filename, O_WRONLY|O_CREAT|O_TRUNC, 0644)) < 0) {
|
|
fprintf(stderr, "Can't open output file '%s'\n",filename);
|
|
return ret;
|
|
}
|
|
|
|
lseek(fd, MBR_DISK_SIGNATURE_OFFSET, SEEK_SET);
|
|
if (write(fd, &signature, sizeof(signature)) != sizeof(signature)) {
|
|
fputs("write failed.\n", stderr);
|
|
goto fail;
|
|
}
|
|
|
|
lseek(fd, MBR_PARTITION_ENTRY_OFFSET, SEEK_SET);
|
|
if (write(fd, &pte, sizeof(struct pte)) != sizeof(struct pte)) {
|
|
fputs("write failed.\n", stderr);
|
|
goto fail;
|
|
}
|
|
|
|
lseek(fd, MBR_BOOT_SIGNATURE_OFFSET, SEEK_SET);
|
|
if (write(fd, "\x55\xaa", 2) != 2) {
|
|
fputs("write failed.\n", stderr);
|
|
goto fail;
|
|
}
|
|
|
|
if (write(fd, &gpth, GPT_HEADER_SIZE) != GPT_HEADER_SIZE) {
|
|
fputs("write failed.\n", stderr);
|
|
goto fail;
|
|
}
|
|
|
|
lseek(fd, GPT_FIRST_ENTRY_SECTOR * DISK_SECTOR_SIZE, SEEK_SET);
|
|
if (write(fd, &gpte, GPT_ENTRY_SIZE * GPT_ENTRY_MAX) != GPT_ENTRY_SIZE * GPT_ENTRY_MAX) {
|
|
fputs("write failed.\n", stderr);
|
|
goto fail;
|
|
}
|
|
|
|
#ifdef WANT_ALTERNATE_PTABLE
|
|
/* The alternate partition table (We omit it by default) */
|
|
swap(gpth.self, gpth.alternate);
|
|
gpth.first_entry = cpu_to_le64(end - GPT_ENTRY_SIZE * GPT_ENTRY_MAX / DISK_SECTOR_SIZE),
|
|
gpth.crc32 = 0;
|
|
gpth.crc32 = cpu_to_le32(gpt_crc32(&gpth, GPT_HEADER_SIZE));
|
|
|
|
lseek(fd, end * DISK_SECTOR_SIZE - GPT_ENTRY_SIZE * GPT_ENTRY_MAX, SEEK_SET);
|
|
if (write(fd, &gpte, GPT_ENTRY_SIZE * GPT_ENTRY_MAX) != GPT_ENTRY_SIZE * GPT_ENTRY_MAX) {
|
|
fputs("write failed.\n", stderr);
|
|
goto fail;
|
|
}
|
|
|
|
lseek(fd, end * DISK_SECTOR_SIZE, SEEK_SET);
|
|
if (write(fd, &gpth, GPT_HEADER_SIZE) != GPT_HEADER_SIZE) {
|
|
fputs("write failed.\n", stderr);
|
|
goto fail;
|
|
}
|
|
lseek(fd, (end + 1) * DISK_SECTOR_SIZE -1, SEEK_SET);
|
|
if (write(fd, "\x00", 1) != 1) {
|
|
fputs("write failed.\n", stderr);
|
|
goto fail;
|
|
}
|
|
#endif
|
|
|
|
ret = 0;
|
|
fail:
|
|
close(fd);
|
|
return ret;
|
|
}
|
|
|
|
static void usage(char *prog)
|
|
{
|
|
fprintf(stderr, "Usage: %s [-v] [-n] [-g] -h <heads> -s <sectors> -o <outputfile> [-a 0..4] [-l <align kB>] [-G <guid>] [[-t <type>] -p <size>[@<start>]...] \n", prog);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
int main (int argc, char **argv)
|
|
{
|
|
unsigned char type = 0x83;
|
|
char *p;
|
|
int ch;
|
|
int part = 0;
|
|
uint32_t signature = 0x5452574F; /* 'OWRT' */
|
|
guid_t guid = GUID_INIT( signature, 0x2211, 0x4433, \
|
|
0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0x00);
|
|
|
|
while ((ch = getopt(argc, argv, "h:s:p:a:t:o:vngl:S:G:")) != -1) {
|
|
switch (ch) {
|
|
case 'o':
|
|
filename = optarg;
|
|
break;
|
|
case 'v':
|
|
verbose++;
|
|
break;
|
|
case 'n':
|
|
ignore_null_sized_partition = true;
|
|
break;
|
|
case 'g':
|
|
use_guid_partition_table = 1;
|
|
break;
|
|
case 'h':
|
|
heads = (int)strtoul(optarg, NULL, 0);
|
|
break;
|
|
case 's':
|
|
sectors = (int)strtoul(optarg, NULL, 0);
|
|
break;
|
|
case 'p':
|
|
if (part > GPT_ENTRY_MAX - 1 || (!use_guid_partition_table && part > 3)) {
|
|
fputs("Too many partitions\n", stderr);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
p = strchr(optarg, '@');
|
|
if (p) {
|
|
*(p++) = 0;
|
|
parts[part].start = to_kbytes(p);
|
|
}
|
|
parts[part].size = to_kbytes(optarg);
|
|
fprintf(stderr, "part %ld %ld\n", parts[part].start, parts[part].size);
|
|
parts[part++].type = type;
|
|
break;
|
|
case 't':
|
|
type = (char)strtoul(optarg, NULL, 16);
|
|
break;
|
|
case 'a':
|
|
active = (int)strtoul(optarg, NULL, 0);
|
|
if ((active < 0) || (active > 4))
|
|
active = 0;
|
|
break;
|
|
case 'l':
|
|
kb_align = (int)strtoul(optarg, NULL, 0) * 2;
|
|
break;
|
|
case 'S':
|
|
signature = strtoul(optarg, NULL, 0);
|
|
break;
|
|
case 'G':
|
|
if (guid_parse(optarg, &guid)) {
|
|
fputs("Invalid guid string\n", stderr);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
break;
|
|
case '?':
|
|
default:
|
|
usage(argv[0]);
|
|
}
|
|
}
|
|
argc -= optind;
|
|
if (argc || (heads <= 0) || (sectors <= 0) || !filename)
|
|
usage(argv[0]);
|
|
|
|
if (use_guid_partition_table)
|
|
return gen_gptable(signature, guid, part) ? EXIT_FAILURE : EXIT_SUCCESS;
|
|
|
|
return gen_ptable(signature, part) ? EXIT_FAILURE : EXIT_SUCCESS;
|
|
}
|