+++ /dev/null
-diff -urN linux.old/fs/partitions/check.c linux.dev/fs/partitions/check.c
---- linux.old/fs/partitions/check.c 2006-05-31 02:31:44.000000000 +0200
-+++ linux.dev/fs/partitions/check.c 2006-06-15 01:27:17.000000000 +0200
-@@ -29,6 +29,7 @@
- #include "ldm.h"
- #include "mac.h"
- #include "msdos.h"
-+#include "openwrt.h"
- #include "osf.h"
- #include "sgi.h"
- #include "sun.h"
-@@ -48,6 +49,9 @@
- * Probe partition formats with tables at disk address 0
- * that also have an ADFS boot block at 0xdc0.
- */
-+#ifdef CONFIG_OPENWRT_PARTITION
-+ openwrt_partition,
-+#endif
- #ifdef CONFIG_ACORN_PARTITION_ICS
- adfspart_check_ICS,
- #endif
-diff -urN linux.old/fs/partitions/Kconfig linux.dev/fs/partitions/Kconfig
---- linux.old/fs/partitions/Kconfig 2006-05-31 02:31:44.000000000 +0200
-+++ linux.dev/fs/partitions/Kconfig 2006-06-15 01:27:17.000000000 +0200
-@@ -14,6 +14,12 @@
-
- If unsure, say N.
-
-+config OPENWRT_PARTITION
-+ bool "OpenWrt partition support" if PARTITION_ADVANCED
-+ default y
-+ help
-+ Support the custom OpenWrt partition map
-+
- config ACORN_PARTITION
- bool "Acorn partition support" if PARTITION_ADVANCED
- default y if ARCH_ACORN
-diff -urN linux.old/fs/partitions/Makefile linux.dev/fs/partitions/Makefile
---- linux.old/fs/partitions/Makefile 2006-05-31 02:31:44.000000000 +0200
-+++ linux.dev/fs/partitions/Makefile 2006-06-15 01:27:17.000000000 +0200
-@@ -11,6 +11,7 @@
- obj-$(CONFIG_MAC_PARTITION) += mac.o
- obj-$(CONFIG_LDM_PARTITION) += ldm.o
- obj-$(CONFIG_MSDOS_PARTITION) += msdos.o
-+obj-$(CONFIG_OPENWRT_PARTITION) += openwrt.o
- obj-$(CONFIG_OSF_PARTITION) += osf.o
- obj-$(CONFIG_SGI_PARTITION) += sgi.o
- obj-$(CONFIG_SUN_PARTITION) += sun.o
-diff -urN linux.old/fs/partitions/openwrt.c linux.dev/fs/partitions/openwrt.c
---- linux.old/fs/partitions/openwrt.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux.dev/fs/partitions/openwrt.c 2006-06-15 01:27:17.000000000 +0200
-@@ -0,0 +1,249 @@
-+/*
-+ * fs/partitions/openwrt.c
-+ *
-+ * Code extracted from drivers/block/genhd.c
-+ * and fs/partitions/msdos.c
-+ *
-+ * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
-+ * Copyright (C) 1991-1998 Linus Torvalds
-+ *
-+ * Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
-+ * in the early extended-partition checks and added DM partitions
-+ *
-+ * Support for DiskManager v6.0x added by Mark Lord,
-+ * with information provided by OnTrack. This now works for linux fdisk
-+ * and LILO, as well as loadlin and bootln. Note that disks other than
-+ * /dev/hda *must* have a "DOS" type 0x51 partition in the first slot (hda1).
-+ *
-+ * More flexible handling of extended partitions - aeb, 950831
-+ *
-+ * Check partition table on IDE disks for common CHS translations
-+ *
-+ * Re-organised Feb 1998 Russell King
-+ */
-+
-+#include <linux/config.h>
-+
-+#include "check.h"
-+#include "openwrt.h"
-+
-+/*
-+ * Many architectures don't like unaligned accesses, while
-+ * the nr_sects and start_sect partition table entries are
-+ * at a 2 (mod 4) address.
-+ */
-+#include <asm/unaligned.h>
-+
-+#define SYS_IND(p) (get_unaligned(&p->sys_ind))
-+#define NR_SECTS(p) ({ __typeof__(p->nr_sects) __a = \
-+ get_unaligned(&p->nr_sects); \
-+ le32_to_cpu(__a); \
-+ })
-+
-+#define START_SECT(p) ({ __typeof__(p->start_sect) __a = \
-+ get_unaligned(&p->start_sect); \
-+ le32_to_cpu(__a); \
-+ })
-+
-+static inline int is_extended_partition(struct partition *p)
-+{
-+ return (SYS_IND(p) == DOS_EXTENDED_PARTITION ||
-+ SYS_IND(p) == WIN98_EXTENDED_PARTITION ||
-+ SYS_IND(p) == LINUX_EXTENDED_PARTITION);
-+}
-+
-+#define MSDOS_LABEL_MAGIC1 0x55
-+#define MSDOS_LABEL_MAGIC2 0xAA
-+
-+static inline int
-+msdos_magic_present(unsigned char *p)
-+{
-+ return (p[0] == MSDOS_LABEL_MAGIC1 && p[1] == MSDOS_LABEL_MAGIC2);
-+}
-+
-+static inline int
-+openwrt_magic_present(unsigned char *p)
-+{
-+ return (p[0] == 'O' &&
-+ p[1] == 'W' &&
-+ p[2] == 'R' &&
-+ p[3] == 'T');
-+}
-+
-+/*
-+ * Create devices for each logical partition in an extended partition.
-+ * The logical partitions form a linked list, with each entry being
-+ * a partition table with two entries. The first entry
-+ * is the real data partition (with a start relative to the partition
-+ * table start). The second is a pointer to the next logical partition
-+ * (with a start relative to the entire extended partition).
-+ * We do not create a Linux partition for the partition tables, but
-+ * only for the actual data partitions.
-+ */
-+
-+static void
-+parse_extended(struct parsed_partitions *state, struct block_device *bdev,
-+ u32 first_sector, u32 first_size)
-+{
-+ struct partition *p;
-+ Sector sect;
-+ unsigned char *data;
-+ u32 this_sector, this_size;
-+ int sector_size = bdev_hardsect_size(bdev) / 512;
-+ int loopct = 0; /* number of links followed
-+ without finding a data partition */
-+ int i;
-+
-+ this_sector = first_sector;
-+ this_size = first_size;
-+
-+ while (1) {
-+ if (++loopct > 100)
-+ return;
-+ if (state->next == state->limit)
-+ return;
-+ data = read_dev_sector(bdev, this_sector, §);
-+ if (!data)
-+ return;
-+
-+ if (!msdos_magic_present(data + 510))
-+ goto done;
-+
-+ p = (struct partition *) (data + 0x1be);
-+
-+ /*
-+ * Usually, the first entry is the real data partition,
-+ * the 2nd entry is the next extended partition, or empty,
-+ * and the 3rd and 4th entries are unused.
-+ * However, DRDOS sometimes has the extended partition as
-+ * the first entry (when the data partition is empty),
-+ * and OS/2 seems to use all four entries.
-+ */
-+
-+ /*
-+ * First process the data partition(s)
-+ */
-+ for (i=0; i<4; i++, p++) {
-+ u32 offs, size, next;
-+ if (!NR_SECTS(p) || is_extended_partition(p))
-+ continue;
-+
-+ /* Check the 3rd and 4th entries -
-+ these sometimes contain random garbage */
-+ offs = START_SECT(p)*sector_size;
-+ size = NR_SECTS(p)*sector_size;
-+ next = this_sector + offs;
-+ if (i >= 2) {
-+ if (offs + size > this_size)
-+ continue;
-+ if (next < first_sector)
-+ continue;
-+ if (next + size > first_sector + first_size)
-+ continue;
-+ }
-+
-+ put_partition(state, state->next, next, size);
-+ if (SYS_IND(p) == LINUX_RAID_PARTITION)
-+ state->parts[state->next].flags = 1;
-+ loopct = 0;
-+ if (++state->next == state->limit)
-+ goto done;
-+ }
-+ /*
-+ * Next, process the (first) extended partition, if present.
-+ * (So far, there seems to be no reason to make
-+ * parse_extended() recursive and allow a tree
-+ * of extended partitions.)
-+ * It should be a link to the next logical partition.
-+ */
-+ p -= 4;
-+ for (i=0; i<4; i++, p++)
-+ if (NR_SECTS(p) && is_extended_partition(p))
-+ break;
-+ if (i == 4)
-+ goto done; /* nothing left to do */
-+
-+ this_sector = first_sector + START_SECT(p) * sector_size;
-+ this_size = NR_SECTS(p) * sector_size;
-+ put_dev_sector(sect);
-+ }
-+done:
-+ put_dev_sector(sect);
-+}
-+
-+
-+int openwrt_partition(struct parsed_partitions *state, struct block_device *bdev)
-+{
-+ int sector_size = bdev_hardsect_size(bdev) / 512;
-+ Sector sect;
-+ unsigned char *data;
-+ struct partition *p;
-+ int slot;
-+ u32 last_block = 0;
-+ u32 size = 0;
-+ int firstfree = 5;
-+
-+ data = read_dev_sector(bdev, 0, §);
-+ if (!data)
-+ return -1;
-+ if (!openwrt_magic_present(data)) {
-+ printk("No OpenWrt partition table detected\n");
-+ put_dev_sector(sect);
-+ return 0;
-+ }
-+
-+ /*
-+ * Now that the 55aa signature is present, this is probably
-+ * either the boot sector of a FAT filesystem or a DOS-type
-+ * partition table. Reject this in case the boot indicator
-+ * is not 0 or 0x80.
-+ */
-+ p = (struct partition *) (data + 0x1be);
-+ for (slot = 1; slot <= 4; slot++, p++) {
-+ if (p->boot_ind != 0 && p->boot_ind != 0x80) {
-+ put_dev_sector(sect);
-+ return 0;
-+ }
-+ }
-+
-+ p = (struct partition *) (data + 0x1be);
-+
-+ /*
-+ * Look for partitions in two passes:
-+ * First find the primary and DOS-type extended partitions.
-+ */
-+
-+ state->next = 6;
-+ for (slot = 1 ; slot <= 4 ; slot++, p++) {
-+ u32 start = START_SECT(p)*sector_size;
-+ size = NR_SECTS(p)*sector_size;
-+ if (!size) {
-+ if (firstfree > slot)
-+ firstfree = slot;
-+
-+ continue;
-+ }
-+ if (is_extended_partition(p)) {
-+ /* prevent someone doing mkfs or mkswap on an
-+ extended partition, but leave room for LILO */
-+ last_block = start + size;
-+ put_partition(state, slot, start, size == 1 ? 1 : 2);
-+ printk(" <");
-+ parse_extended(state, bdev, start, size);
-+ printk(" >");
-+ continue;
-+ }
-+ if ((start + size) > get_capacity(bdev->bd_disk))
-+ size = get_capacity(bdev->bd_disk) - start;
-+ last_block = start + size;
-+ put_partition(state, slot, start, size);
-+ }
-+ if (last_block + 1024 < (size = get_capacity(bdev->bd_disk)))
-+ put_partition(state, firstfree, last_block, size - last_block);
-+
-+ printk("\n");
-+
-+ put_dev_sector(sect);
-+ return 1;
-+}
-+
-diff -urN linux.old/fs/partitions/openwrt.h linux.dev/fs/partitions/openwrt.h
---- linux.old/fs/partitions/openwrt.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux.dev/fs/partitions/openwrt.h 2006-06-15 01:27:17.000000000 +0200
-@@ -0,0 +1,6 @@
-+/*
-+ * fs/partitions/openwrt.h
-+ */
-+
-+int openwrt_partition(struct parsed_partitions *state, struct block_device *bdev);
-+
--- /dev/null
+/*
+ * ptgen - partition table generator
+ * Copyright (C) 2006 by Felix Fietkau <nbd@openwrt.org>
+ *
+ * uses parts of afdisk
+ * Copyright (C) 2002 by David Roetzel <david@roetzel.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <fcntl.h>
+
+#if __BYTE_ORDER == __BIG_ENDIAN
+#define cpu_to_le16(x) bswap_16(x)
+#elif __BYTE_ORDER == __LITTLE_ENDIAN
+#define cpu_to_le16(x) (x)
+#else
+#error unknown endianness!
+#endif
+
+/* Partition table entry */
+struct pte {
+ unsigned char active;
+ unsigned char chs_start[3];
+ unsigned char type;
+ unsigned char chs_end[3];
+ unsigned int start;
+ unsigned int length;
+};
+
+struct partinfo {
+ unsigned long size;
+ int type;
+};
+
+int verbose = 0;
+int active = 1;
+int heads = -1;
+int sectors = -1;
+struct partinfo parts[4];
+char *filename = NULL;
+
+
+/*
+ * parse the size argument, which is either
+ * a simple number (K assumed) or
+ * K, M or G
+ *
+ * returns the size in KByte
+ */
+static long to_kbytes(const char *string) {
+ int exp = 0;
+ long result;
+ char *end;
+
+ result = strtoul(string, &end, 0);
+ switch (tolower(*end)) {
+ case 'k' :
+ case '\0' : exp = 0; break;
+ case 'm' : exp = 1; break;
+ case 'g' : exp = 2; break;
+ default: return 0;
+ }
+
+ if (*end)
+ end++;
+
+ if (*end) {
+ fprintf(stderr, "garbage after end of number\n");
+ return 0;
+ }
+
+ /* result: number + 1024^(exp) */
+ return result * ((2 << ((10 * exp) - 1)) ?: 1);
+}
+
+/* convert the sector number into a CHS value for the partition table */
+static void to_chs(long sect, unsigned char chs[3]) {
+ int c,h,s;
+
+ s = (sect % sectors) + 1;
+ sect = sect / sectors;
+ h = sect % heads;
+ sect = sect / heads;
+ c = sect;
+
+ chs[0] = h;
+ chs[1] = s | ((c >> 2) & 0xC0);
+ chs[2] = c & 0xFF;
+
+ return;
+}
+
+/* round the sector number up to the next cylinder */
+static inline unsigned long round_to_cyl(long sect) {
+ int cyl_size = heads * sectors;
+
+ return sect + cyl_size - ((sect % cyl_size) ?: cyl_size);
+}
+
+/* check the partition sizes and write the partition table */
+static int gen_ptable(int nr)
+{
+ struct pte pte[4];
+ unsigned long sect = 0;
+ int i, fd, ret = -1, start, len;
+
+ memset(pte, 0, sizeof(struct pte) * 4);
+ for (i = 0; i < nr; i++) {
+ if (!parts[i].size) {
+ fprintf(stderr, "Invalid size in partition %d!\n", i);
+ return -1;
+ }
+ pte[i].active = ((i + 1) == active) ? 0x80 : 0;
+ pte[i].type = parts[i].type;
+ pte[i].start = cpu_to_le16(start = sect + sectors);
+ sect = round_to_cyl(start + parts[i].size * 2);
+ pte[i].length = cpu_to_le16(len = sect - start);
+ to_chs(start, pte[i].chs_start);
+ to_chs(start + len - 1, pte[i].chs_end);
+ if (verbose)
+ fprintf(stderr, "Partition %d: start=%ld, end=%ld, size=%ld\n", i, (long) start * 512, ((long) start + (long) len) * 512, (long) len * 512);
+ printf("%ld\n", ((long) start * 512));
+ }
+
+ if ((fd = open(filename, O_WRONLY|O_CREAT, 0644)) < 0) {
+ fprintf(stderr, "Can't open output file '%s'\n",filename);
+ return -1;
+ }
+
+ lseek(fd, 446, SEEK_SET);
+ if (write(fd, pte, sizeof(struct pte) * 4) != sizeof(struct pte) * 4) {
+ fprintf(stderr, "write failed.\n");
+ goto fail;
+ }
+ lseek(fd, 510, SEEK_SET);
+ if (write(fd, "\x55\xaa", 2) != 2) {
+ fprintf(stderr, "write failed.\n");
+ goto fail;
+ }
+
+ ret = 0;
+fail:
+ close(fd);
+ return ret;
+}
+
+static void usage(char *prog)
+{
+ fprintf(stderr, "Usage: %s [-v] -h <heads> -s <sectors> -o <outputfile> [-a 0..4] [[-t <type>] -p <size>...] \n", prog);
+ exit(1);
+}
+
+int main (int argc, char **argv)
+{
+ char type = 0x83;
+ int ch;
+ int part = 0;
+
+ while ((ch = getopt(argc, argv, "h:s:p:a:t:o:v")) != -1) {
+ switch (ch) {
+ case 'o':
+ filename = optarg;
+ break;
+ case 'v':
+ verbose++;
+ break;
+ case 'h':
+ heads = (int) strtoul(optarg, NULL, 0);
+ break;
+ case 's':
+ sectors = (int) strtoul(optarg, NULL, 0);
+ break;
+ case 'p':
+ if (part > 3) {
+ fprintf(stderr, "Too many partitions\n");
+ exit(1);
+ }
+ parts[part].size = to_kbytes(optarg);
+ 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 '?':
+ default:
+ usage(argv[0]);
+ }
+ }
+ argc -= optind;
+ if (argc || (heads <= 0) || (sectors <= 0) || !filename)
+ usage(argv[0]);
+
+ return gen_ptable(part);
+}
projects / openwrt.git / commitdiff