vbatts
/
grub
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
grub/util/grub-setup.c

1184 lines
34 KiB
C
Raw Blame History

/* grub-setup.c - make GRUB usable */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2011 Free Software Foundation, Inc.
*
* GRUB 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 3 of the License, or
* (at your option) any later version.
*
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <grub/types.h>
#include <grub/emu/misc.h>
#include <grub/util/misc.h>
#include <grub/device.h>
#include <grub/disk.h>
#include <grub/file.h>
#include <grub/fs.h>
#include <grub/partition.h>
#include <grub/env.h>
#include <grub/emu/hostdisk.h>
#include <grub/term.h>
#include <grub/i18n.h>
#include <grub/util/lvm.h>
#ifdef GRUB_SETUP_SPARC64
#include <grub/util/ofpath.h>
#include <grub/sparc64/ieee1275/boot.h>
#include <grub/sparc64/ieee1275/kernel.h>
#else
#include <grub/i386/pc/boot.h>
#include <grub/i386/pc/kernel.h>
#endif
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
#include <assert.h>
#include <grub/emu/getroot.h>
#include "progname.h"
#include <grub/reed_solomon.h>
#include <grub/msdos_partition.h>
#include <include/grub/crypto.h>
#ifdef __linux__
#include <sys/ioctl.h>
#include <linux/fs.h>
#include <linux/fiemap.h>
#endif
#define _GNU_SOURCE 1
#include <argp.h>
/* On SPARC this program fills in various fields inside of the 'boot' and 'core'
* image files.
*
* The 'boot' image needs to know the OBP path name of the root
* device. It also needs to know the initial block number of
* 'core' (which is 'diskboot' concatenated with 'kernel' and
* all the modules, this is created by grub-mkimage). This resulting
* 'boot' image is 512 bytes in size and is placed in the second block
* of a partition.
*
* The initial 'diskboot' block acts as a loader for the actual GRUB
* kernel. It contains the loading code and then a block list.
*
* The block list of 'core' starts at the end of the 'diskboot' image
* and works it's way backwards towards the end of the code of 'diskboot'.
*
* We patch up the images with the necessary values and write out the
* result.
*/
#define DEFAULT_BOOT_FILE "boot.img"
#define DEFAULT_CORE_FILE "core.img"
#ifdef GRUB_SETUP_SPARC64
#define grub_target_to_host16(x) grub_be_to_cpu16(x)
#define grub_target_to_host32(x) grub_be_to_cpu32(x)
#define grub_target_to_host64(x) grub_be_to_cpu64(x)
#define grub_host_to_target16(x) grub_cpu_to_be16(x)
#define grub_host_to_target32(x) grub_cpu_to_be32(x)
#define grub_host_to_target64(x) grub_cpu_to_be64(x)
#elif defined (GRUB_SETUP_BIOS)
#define grub_target_to_host16(x) grub_le_to_cpu16(x)
#define grub_target_to_host32(x) grub_le_to_cpu32(x)
#define grub_target_to_host64(x) grub_le_to_cpu64(x)
#define grub_host_to_target16(x) grub_cpu_to_le16(x)
#define grub_host_to_target32(x) grub_cpu_to_le32(x)
#define grub_host_to_target64(x) grub_cpu_to_le64(x)
#else
#error Complete this
#endif
static void
write_rootdev (char *core_img, grub_device_t root_dev,
char *boot_img, grub_uint64_t first_sector)
{
#ifdef GRUB_SETUP_BIOS
{
grub_uint8_t *boot_drive;
grub_disk_addr_t *kernel_sector;
boot_drive = (grub_uint8_t *) (boot_img + GRUB_BOOT_MACHINE_BOOT_DRIVE);
kernel_sector = (grub_disk_addr_t *) (boot_img
+ GRUB_BOOT_MACHINE_KERNEL_SECTOR);
/* FIXME: can this be skipped? */
*boot_drive = 0xFF;
*kernel_sector = grub_cpu_to_le64 (first_sector);
}
#endif
#ifdef GRUB_SETUP_SPARC64
{
grub_disk_addr_t *kernel_byte;
kernel_byte = (grub_disk_addr_t *) (boot_img
+ GRUB_BOOT_AOUT_HEADER_SIZE
+ GRUB_BOOT_MACHINE_KERNEL_BYTE);
*kernel_byte = grub_cpu_to_be64 (first_sector << GRUB_DISK_SECTOR_BITS);
}
#endif
}
#ifdef GRUB_SETUP_SPARC64
#define BOOT_SECTOR 1
#else
#define BOOT_SECTOR 0
#endif
static void
setup (const char *dir,
const char *boot_file, const char *core_file,
const char *dest, int force,
int fs_probe, int allow_floppy)
{
char *boot_path, *core_path, *core_path_dev, *core_path_dev_full;
char *boot_img, *core_img;
char *root = 0;
size_t boot_size, core_size;
grub_uint16_t core_sectors;
grub_device_t root_dev = 0, dest_dev;
struct grub_boot_blocklist *first_block, *block;
char *tmp_img;
grub_disk_addr_t first_sector;
#ifdef GRUB_SETUP_BIOS
grub_uint16_t current_segment
= GRUB_BOOT_I386_PC_KERNEL_SEG + (GRUB_DISK_SECTOR_SIZE >> 4);
#endif
grub_uint16_t last_length = GRUB_DISK_SECTOR_SIZE;
FILE *fp;
auto void NESTED_FUNC_ATTR save_first_sector (grub_disk_addr_t sector,
unsigned offset,
unsigned length);
auto void NESTED_FUNC_ATTR save_blocklists (grub_disk_addr_t sector,
unsigned offset,
unsigned length);
void NESTED_FUNC_ATTR save_first_sector (grub_disk_addr_t sector,
unsigned offset,
unsigned length)
{
grub_util_info ("the first sector is <%" PRIuGRUB_UINT64_T ",%u,%u>",
sector, offset, length);
if (offset != 0 || length != GRUB_DISK_SECTOR_SIZE)
grub_util_error ("%s", _("the first sector of the core file is not sector-aligned"));
first_sector = sector;
}
void NESTED_FUNC_ATTR save_blocklists (grub_disk_addr_t sector,
unsigned offset,
unsigned length)
{
struct grub_boot_blocklist *prev = block + 1;
grub_util_info ("saving <%" PRIuGRUB_UINT64_T ",%u,%u>",
sector, offset, length);
if (offset != 0 || last_length != GRUB_DISK_SECTOR_SIZE)
grub_util_error ("%s", _("non-sector-aligned data is found in the core file"));
if (block != first_block
&& (grub_target_to_host64 (prev->start)
+ grub_target_to_host16 (prev->len)) == sector)
{
grub_uint16_t t = grub_target_to_host16 (prev->len) + 1;
prev->len = grub_host_to_target16 (t);
}
else
{
block->start = grub_host_to_target64 (sector);
block->len = grub_host_to_target16 (1);
#ifdef GRUB_SETUP_BIOS
block->segment = grub_host_to_target16 (current_segment);
#endif
block--;
if (block->len)
grub_util_error ("%s", _("the sectors of the core file are too fragmented"));
}
last_length = length;
#ifdef GRUB_SETUP_BIOS
current_segment += GRUB_DISK_SECTOR_SIZE >> 4;
#endif
}
/* Read the boot image by the OS service. */
boot_path = grub_util_get_path (dir, boot_file);
boot_size = grub_util_get_image_size (boot_path);
if (boot_size != GRUB_DISK_SECTOR_SIZE)
grub_util_error (_("the size of `%s' is not %u"),
boot_path, GRUB_DISK_SECTOR_SIZE);
boot_img = grub_util_read_image (boot_path);
free (boot_path);
core_path = grub_util_get_path (dir, core_file);
core_size = grub_util_get_image_size (core_path);
core_sectors = ((core_size + GRUB_DISK_SECTOR_SIZE - 1)
>> GRUB_DISK_SECTOR_BITS);
if (core_size < GRUB_DISK_SECTOR_SIZE)
grub_util_error (_("the size of `%s' is too small"), core_path);
#ifdef GRUB_SETUP_BIOS
if (core_size > 0xFFFF * GRUB_DISK_SECTOR_SIZE)
grub_util_error (_("the size of `%s' is too large"), core_path);
#endif
core_img = grub_util_read_image (core_path);
/* Have FIRST_BLOCK to point to the first blocklist. */
first_block = (struct grub_boot_blocklist *) (core_img
+ GRUB_DISK_SECTOR_SIZE
- sizeof (*block));
grub_util_info ("root is `%s', dest is `%s'", root, dest);
grub_util_info ("Opening dest");
dest_dev = grub_device_open (dest);
if (! dest_dev)
grub_util_error ("%s", grub_errmsg);
{
char **root_devices = grub_guess_root_devices (dir);
char **cur;
int found = 0;
for (cur = root_devices; *cur; cur++)
{
char *drive;
grub_device_t try_dev;
drive = grub_util_get_grub_dev (*cur);
if (!drive)
continue;
try_dev = grub_device_open (drive);
if (! try_dev)
continue;
if (!found && try_dev->disk->id == dest_dev->disk->id
&& try_dev->disk->dev->id == dest_dev->disk->dev->id)
{
if (root_dev)
grub_device_close (root_dev);
free (root);
root_dev = try_dev;
root = drive;
found = 1;
continue;
}
if (!root_dev)
{
root_dev = try_dev;
root = drive;
continue;
}
grub_device_close (try_dev);
free (drive);
}
if (!root_dev)
{
grub_util_error ("guessing the root device failed, because of `%s'",
grub_errmsg);
}
grub_util_info ("guessed root_dev `%s' from "
"dir `%s'", root_dev->disk->name, dir);
}
grub_util_info ("setting the root device to `%s'", root);
if (grub_env_set ("root", root) != GRUB_ERR_NONE)
grub_util_error ("%s", grub_errmsg);
#ifdef GRUB_SETUP_BIOS
/* Read the original sector from the disk. */
tmp_img = xmalloc (GRUB_DISK_SECTOR_SIZE);
if (grub_disk_read (dest_dev->disk, 0, 0, GRUB_DISK_SECTOR_SIZE, tmp_img))
grub_util_error ("%s", grub_errmsg);
#endif
#ifdef GRUB_SETUP_BIOS
{
grub_uint16_t *boot_drive_check;
boot_drive_check = (grub_uint16_t *) (boot_img
+ GRUB_BOOT_MACHINE_DRIVE_CHECK);
/* Copy the possible DOS BPB. */
memcpy (boot_img + GRUB_BOOT_MACHINE_BPB_START,
tmp_img + GRUB_BOOT_MACHINE_BPB_START,
GRUB_BOOT_MACHINE_BPB_END - GRUB_BOOT_MACHINE_BPB_START);
/* If DEST_DRIVE is a hard disk, enable the workaround, which is
for buggy BIOSes which don't pass boot drive correctly. Instead,
they pass 0x00 or 0x01 even when booted from 0x80. */
if (!allow_floppy && !grub_util_biosdisk_is_floppy (dest_dev->disk))
/* Replace the jmp (2 bytes) with double nop's. */
*boot_drive_check = 0x9090;
}
#endif
#ifdef GRUB_SETUP_BIOS
{
grub_partition_map_t dest_partmap = NULL;
grub_partition_t container = dest_dev->disk->partition;
int multiple_partmaps = 0;
int is_ldm;
grub_err_t err;
grub_disk_addr_t *sectors;
int i;
grub_fs_t fs;
unsigned int nsec, maxsec;
/* Unlike root_dev, with dest_dev we're interested in the partition map even
if dest_dev itself is a whole disk. */
auto int NESTED_FUNC_ATTR identify_partmap (grub_disk_t disk,
const grub_partition_t p);
int NESTED_FUNC_ATTR identify_partmap (grub_disk_t disk __attribute__ ((unused)),
const grub_partition_t p)
{
if (p->parent != container)
return 0;
/* NetBSD and OpenBSD subpartitions have metadata inside a partition,
so they are safe to ignore.
*/
if (grub_strcmp (p->partmap->name, "netbsd") == 0
|| grub_strcmp (p->partmap->name, "openbsd") == 0)
return 0;
if (dest_partmap == NULL)
{
dest_partmap = p->partmap;
return 0;
}
if (dest_partmap == p->partmap)
return 0;
multiple_partmaps = 1;
return 1;
}
grub_partition_iterate (dest_dev->disk, identify_partmap);
if (container && grub_strcmp (container->partmap->name, "msdos") == 0
&& dest_partmap
&& (container->msdostype == GRUB_PC_PARTITION_TYPE_NETBSD
|| container->msdostype == GRUB_PC_PARTITION_TYPE_OPENBSD))
{
grub_util_warn ("%s", _("Attempting to install GRUB to a disk with multiple partition labels or both partition label and filesystem. This is not supported yet."));
goto unable_to_embed;
}
fs = grub_fs_probe (dest_dev);
if (!fs)
grub_errno = GRUB_ERR_NONE;
is_ldm = grub_util_is_ldm (dest_dev->disk);
#ifdef GRUB_SETUP_BIOS
if (fs_probe)
{
if (!fs && !dest_partmap)
grub_util_error (_("unable to identify a filesystem in %s; safety check can't be performed"),
dest_dev->disk->name);
if (fs && !fs->reserved_first_sector)
/* TRANSLATORS: Filesystem may reserve the space just GRUB isn't sure about it. */
grub_util_error (_("%s appears to contain a %s filesystem which isn't known to "
"reserve space for DOS-style boot. Installing GRUB there could "
"result in FILESYSTEM DESTRUCTION if valuable data is overwritten "
"by grub-setup (--skip-fs-probe disables this "
"check, use at your own risk)"), dest_dev->disk->name, fs->name);
if (dest_partmap && strcmp (dest_partmap->name, "msdos") != 0
&& strcmp (dest_partmap->name, "gpt") != 0
&& strcmp (dest_partmap->name, "bsd") != 0
&& strcmp (dest_partmap->name, "netbsd") != 0
&& strcmp (dest_partmap->name, "openbsd") != 0
&& strcmp (dest_partmap->name, "sunpc") != 0)
/* TRANSLATORS: Partition map may reserve the space just GRUB isn't sure about it. */
grub_util_error (_("%s appears to contain a %s partition map which isn't known to "
"reserve space for DOS-style boot. Installing GRUB there could "
"result in FILESYSTEM DESTRUCTION if valuable data is overwritten "
"by grub-setup (--skip-fs-probe disables this "
"check, use at your own risk)"), dest_dev->disk->name, dest_partmap->name);
if (is_ldm && dest_partmap && strcmp (dest_partmap->name, "msdos") != 0
&& strcmp (dest_partmap->name, "gpt") != 0)
grub_util_error (_("%s appears to contain a %s partition map and "
"LDM which isn't known to be a safe combination."
" Installing GRUB there could "
"result in FILESYSTEM DESTRUCTION if valuable data"
" is overwritten "
"by grub-setup (--skip-fs-probe disables this "
"check, use at your own risk)"),
dest_dev->disk->name, dest_partmap->name);
}
#endif
/* Copy the partition table. */
if (dest_partmap ||
(!allow_floppy && !grub_util_biosdisk_is_floppy (dest_dev->disk)))
memcpy (boot_img + GRUB_BOOT_MACHINE_WINDOWS_NT_MAGIC,
tmp_img + GRUB_BOOT_MACHINE_WINDOWS_NT_MAGIC,
GRUB_BOOT_MACHINE_PART_END - GRUB_BOOT_MACHINE_WINDOWS_NT_MAGIC);
free (tmp_img);
if (! dest_partmap && ! fs && !is_ldm)
{
grub_util_warn ("%s", _("Attempting to install GRUB to a partitionless disk or to a partition. This is a BAD idea."));
goto unable_to_embed;
}
if (multiple_partmaps || (dest_partmap && fs) || (is_ldm && fs))
{
grub_util_warn ("%s", _("Attempting to install GRUB to a disk with multiple partition labels. This is not supported yet."));
goto unable_to_embed;
}
if (dest_partmap && !dest_partmap->embed)
{
grub_util_warn (_("Partition style `%s' doesn't support embedding"),
dest_partmap->name);
goto unable_to_embed;
}
if (fs && !fs->embed)
{
grub_util_warn (_("File system `%s' doesn't support embedding"),
fs->name);
goto unable_to_embed;
}
nsec = core_sectors;
maxsec = 2 * core_sectors;
if (maxsec > ((0x78000 - GRUB_KERNEL_I386_PC_LINK_ADDR)
>> GRUB_DISK_SECTOR_BITS))
maxsec = ((0x78000 - GRUB_KERNEL_I386_PC_LINK_ADDR)
>> GRUB_DISK_SECTOR_BITS);
if (is_ldm)
err = grub_util_ldm_embed (dest_dev->disk, &nsec, maxsec,
GRUB_EMBED_PCBIOS, &sectors);
else if (dest_partmap)
err = dest_partmap->embed (dest_dev->disk, &nsec, maxsec,
GRUB_EMBED_PCBIOS, &sectors);
else
err = fs->embed (dest_dev, &nsec, maxsec,
GRUB_EMBED_PCBIOS, &sectors);
if (!err && nsec < core_sectors)
{
err = grub_error (GRUB_ERR_OUT_OF_RANGE,
N_("Your embedding area is unusually small. "
"core.img won't fit in it."));
}
err = dest_partmap->embed (dest_dev->disk, &nsec, maxsec,
GRUB_EMBED_PCBIOS, &sectors);
if (err)
{
grub_util_warn ("%s", grub_errmsg);
grub_errno = GRUB_ERR_NONE;
goto unable_to_embed;
}
assert (nsec <= maxsec);
/* Clean out the blocklists. */
block = first_block;
while (block->len)
{
grub_memset (block, 0, sizeof (block));
block--;
if ((char *) block <= core_img)
grub_util_error ("%s", _("no terminator in the core image"));
}
save_first_sector (sectors[0] + grub_partition_get_start (container),
0, GRUB_DISK_SECTOR_SIZE);
block = first_block;
for (i = 1; i < nsec; i++)
save_blocklists (sectors[i] + grub_partition_get_start (container),
0, GRUB_DISK_SECTOR_SIZE);
/* Make sure that the last blocklist is a terminator. */
if (block == first_block)
block--;
block->start = 0;
block->len = 0;
block->segment = 0;
write_rootdev (core_img, root_dev, boot_img, first_sector);
core_img = realloc (core_img, nsec * GRUB_DISK_SECTOR_SIZE);
first_block = (struct grub_boot_blocklist *) (core_img
+ GRUB_DISK_SECTOR_SIZE
- sizeof (*block));
grub_size_t no_rs_length;
*(grub_uint32_t *) (core_img + GRUB_DISK_SECTOR_SIZE
+ GRUB_KERNEL_I386_PC_REED_SOLOMON_REDUNDANCY)
= grub_host_to_target32 (nsec * GRUB_DISK_SECTOR_SIZE - core_size);
no_rs_length = grub_target_to_host16
(*(grub_uint16_t *) (core_img
+ GRUB_DISK_SECTOR_SIZE
+ GRUB_KERNEL_I386_PC_NO_REED_SOLOMON_LENGTH));
if (no_rs_length == 0xffff)
grub_util_error ("%s", _("core.img version mismatch"));
void *tmp = xmalloc (core_size);
grub_memcpy (tmp, core_img, core_size);
grub_reed_solomon_add_redundancy (core_img + no_rs_length + GRUB_DISK_SECTOR_SIZE,
core_size - no_rs_length - GRUB_DISK_SECTOR_SIZE,
nsec * GRUB_DISK_SECTOR_SIZE
- core_size);
assert (grub_memcmp (tmp, core_img, core_size) == 0);
free (tmp);
/* Write the core image onto the disk. */
for (i = 0; i < nsec; i++)
grub_disk_write (dest_dev->disk, sectors[i], 0,
GRUB_DISK_SECTOR_SIZE,
core_img + i * GRUB_DISK_SECTOR_SIZE);
grub_free (sectors);
goto finish;
}
unable_to_embed:
#endif
if (dest_dev->disk->dev->id != root_dev->disk->dev->id)
grub_util_error ("%s", _("embedding is not possible, but this is required for "
"RAID and LVM install"));
{
grub_fs_t fs;
fs = grub_fs_probe (root_dev);
if (!fs)
grub_util_error (_("can't determine filesystem on %s"), root);
if (!fs->blocklist_install)
grub_util_error (_("filesystem `%s' doesn't support blocklists"),
fs->name);
}
#ifdef GRUB_SETUP_BIOS
if (dest_dev->disk->id != root_dev->disk->id
|| dest_dev->disk->dev->id != root_dev->disk->dev->id)
/* TRANSLATORS: cross-disk refers to /boot being on one disk
but MBR on another. */
grub_util_error ("%s", _("embedding is not possible, but this is required for "
"cross-disk install"));
#endif
grub_util_warn ("%s", _("Embedding is not possible. GRUB can only be installed in this "
"setup by using blocklists. However, blocklists are UNRELIABLE and "
"their use is discouraged."));
if (! force)
grub_util_error ("%s", _("will not proceed with blocklists"));
/* The core image must be put on a filesystem unfortunately. */
grub_util_info ("will leave the core image on the filesystem");
/* Make sure that GRUB reads the identical image as the OS. */
tmp_img = xmalloc (core_size);
core_path_dev_full = grub_util_get_path (dir, core_file);
core_path_dev = grub_make_system_path_relative_to_its_root (core_path_dev_full);
free (core_path_dev_full);
grub_util_biosdisk_flush (root_dev->disk);
#ifndef __linux__
#define MAX_TRIES 5
{
int i;
for (i = 0; i < MAX_TRIES; i++)
{
grub_file_t file;
grub_util_info ((i == 0) ? _("attempting to read the core image `%s' from GRUB")
: _("attempting to read the core image `%s' from GRUB again"),
core_path_dev);
grub_disk_cache_invalidate_all ();
grub_file_filter_disable_compression ();
file = grub_file_open (core_path_dev);
if (file)
{
if (grub_file_size (file) != core_size)
grub_util_info ("succeeded in opening the core image but the size is different (%d != %d)",
(int) grub_file_size (file), (int) core_size);
else if (grub_file_read (file, tmp_img, core_size)
!= (grub_ssize_t) core_size)
grub_util_info ("succeeded in opening the core image but cannot read %d bytes",
(int) core_size);
else if (memcmp (core_img, tmp_img, core_size) != 0)
{
#if 0
FILE *dump;
FILE *dump2;
dump = fopen ("dump.img", "wb");
if (dump)
{
fwrite (tmp_img, 1, core_size, dump);
fclose (dump);
}
dump2 = fopen ("dump2.img", "wb");
if (dump2)
{
fwrite (core_img, 1, core_size, dump2);
fclose (dump2);
}
#endif
grub_util_info ("succeeded in opening the core image but the data is different");
}
else
{
grub_file_close (file);
break;
}
grub_file_close (file);
}
else
grub_util_info ("couldn't open the core image");
if (grub_errno)
grub_util_info ("error message = %s", grub_errmsg);
grub_errno = GRUB_ERR_NONE;
grub_util_biosdisk_flush (root_dev->disk);
sleep (1);
}
if (i == MAX_TRIES)
grub_util_error (_("cannot read `%s' correctly"), core_path_dev);
}
#endif
/* Clean out the blocklists. */
block = first_block;
while (block->len)
{
block->start = 0;
block->len = 0;
#ifdef GRUB_SETUP_BIOS
block->segment = 0;
#endif
block--;
if ((char *) block <= core_img)
grub_util_error ("%s", _("no terminator in the core image"));
}
block = first_block;
#ifdef __linux__
{
grub_partition_t container = root_dev->disk->partition;
struct fiemap fie1;
int fd;
/* Write the first two sectors of the core image onto the disk. */
grub_util_info ("opening the core image `%s'", core_path);
fp = fopen (core_path, "rb");
if (! fp)
grub_util_error (_("cannot open `%s': %s"), core_path,
strerror (errno));
fd = fileno (fp);
grub_memset (&fie1, 0, sizeof (fie1));
fie1.fm_length = core_size;
fie1.fm_flags = FIEMAP_FLAG_SYNC;
if (ioctl (fd, FS_IOC_FIEMAP, &fie1) < 0)
{
int nblocks, i, j;
int bsize;
int mul;
grub_util_info ("FIEMAP failed. Reverting to FIBMAP");
if (ioctl (fd, FIGETBSZ, &bsize) < 0)
grub_util_error (_("can't retrieve blocklists: %s"),
strerror (errno));
if (bsize & (GRUB_DISK_SECTOR_SIZE - 1))
grub_util_error ("%s", _("blocksize is not divisible by 512"));
mul = bsize >> GRUB_DISK_SECTOR_BITS;
nblocks = (core_size + bsize - 1) / bsize;
for (i = 0; i < nblocks; i++)
{
unsigned blk = i;
if (ioctl (fd, FIBMAP, &blk) < 0)
grub_util_error (_("can't retrieve blocklists: %s"),
strerror (errno));
for (j = 0; j < mul; j++)
{
int rest = core_size - ((i * mul + j) << GRUB_DISK_SECTOR_BITS);
if (rest <= 0)
break;
if (rest > GRUB_DISK_SECTOR_SIZE)
rest = GRUB_DISK_SECTOR_SIZE;
if (i == 0 && j == 0)
save_first_sector (((grub_uint64_t) blk) * mul
+ grub_partition_get_start (container),
0, rest);
else
save_blocklists (((grub_uint64_t) blk) * mul + j
+ grub_partition_get_start (container),
0, rest);
}
}
}
else
{
struct fiemap *fie2;
int i, j;
fie2 = xmalloc (sizeof (*fie2)
+ fie1.fm_mapped_extents
* sizeof (fie1.fm_extents[1]));
memset (fie2, 0, sizeof (*fie2)
+ fie1.fm_mapped_extents * sizeof (fie2->fm_extents[1]));
fie2->fm_length = core_size;
fie2->fm_flags = FIEMAP_FLAG_SYNC;
fie2->fm_extent_count = fie1.fm_mapped_extents;
if (ioctl (fd, FS_IOC_FIEMAP, fie2) < 0)
grub_util_error (_("can't retrieve blocklists: %s"),
strerror (errno));
for (i = 0; i < fie2->fm_mapped_extents; i++)
{
for (j = 0;
j < ((fie2->fm_extents[i].fe_length
+ GRUB_DISK_SECTOR_SIZE - 1)
>> GRUB_DISK_SECTOR_BITS);
j++)
{
size_t len = (fie2->fm_extents[i].fe_length
- j * GRUB_DISK_SECTOR_SIZE);
if (len > GRUB_DISK_SECTOR_SIZE)
len = GRUB_DISK_SECTOR_SIZE;
if (i == 0 && j == 0)
save_first_sector ((fie2->fm_extents[i].fe_physical
>> GRUB_DISK_SECTOR_BITS)
+ j,
fie2->fm_extents[i].fe_physical
& (GRUB_DISK_SECTOR_SIZE - 1), len);
else
save_blocklists ((fie2->fm_extents[i].fe_physical
>> GRUB_DISK_SECTOR_BITS)
+ j,
fie2->fm_extents[i].fe_physical
& (GRUB_DISK_SECTOR_SIZE - 1), len);
}
}
}
fclose (fp);
}
#else
{
grub_file_t file;
/* Now read the core image to determine where the sectors are. */
grub_file_filter_disable_compression ();
file = grub_file_open (core_path_dev);
if (! file)
grub_util_error ("%s", grub_errmsg);
file->read_hook = save_first_sector;
if (grub_file_read (file, tmp_img, GRUB_DISK_SECTOR_SIZE)
!= GRUB_DISK_SECTOR_SIZE)
grub_util_error ("%s", _("failed to read the first sector of the core image"));
block = first_block;
file->read_hook = save_blocklists;
if (grub_file_read (file, tmp_img, core_size - GRUB_DISK_SECTOR_SIZE)
!= (grub_ssize_t) core_size - GRUB_DISK_SECTOR_SIZE)
grub_util_error ("%s", _("failed to read the rest sectors of the core image"));
grub_file_close (file);
}
#endif
#ifdef GRUB_SETUP_SPARC64
{
char *boot_devpath;
boot_devpath = (char *) (boot_img
+ GRUB_BOOT_AOUT_HEADER_SIZE
+ GRUB_BOOT_MACHINE_BOOT_DEVPATH);
if (dest_dev->disk->id != root_dev->disk->id
|| dest_dev->disk->dev->id != root_dev->disk->dev->id)
{
const char *dest_ofpath;
dest_ofpath
= grub_util_devname_to_ofpath (grub_util_biosdisk_get_osdev (root_dev->disk));
grub_util_info ("dest_ofpath is `%s'", dest_ofpath);
strncpy (boot_devpath, dest_ofpath,
GRUB_BOOT_MACHINE_BOOT_DEVPATH_END
- GRUB_BOOT_MACHINE_BOOT_DEVPATH - 1);
boot_devpath[GRUB_BOOT_MACHINE_BOOT_DEVPATH_END
- GRUB_BOOT_MACHINE_BOOT_DEVPATH - 1] = 0;
}
else
{
grub_util_info ("non cross-disk install");
memset (boot_devpath, 0, GRUB_BOOT_MACHINE_BOOT_DEVPATH_END
- GRUB_BOOT_MACHINE_BOOT_DEVPATH);
}
grub_util_info ("boot device path %s", boot_devpath);
}
#endif
free (core_path_dev);
free (tmp_img);
write_rootdev (core_img, root_dev, boot_img, first_sector);
/* Write the first two sectors of the core image onto the disk. */
grub_util_info ("opening the core image `%s'", core_path);
fp = fopen (core_path, "r+b");
if (! fp)
grub_util_error (_("cannot open `%s': %s"), core_path,
strerror (errno));
grub_util_write_image (core_img, GRUB_DISK_SECTOR_SIZE * 2, fp, core_path);
fflush (fp);
fsync (fileno (fp));
fclose (fp);
grub_util_biosdisk_flush (root_dev->disk);
grub_disk_cache_invalidate_all ();
{
char *buf, *ptr = core_img;
size_t len = core_size;
grub_uint64_t blk;
grub_partition_t container = root_dev->disk->partition;
grub_err_t err;
root_dev->disk->partition = 0;
buf = xmalloc (core_size);
blk = first_sector;
err = grub_disk_read (dest_dev->disk, blk, 0, GRUB_DISK_SECTOR_SIZE, buf);
if (err)
grub_util_error (_("cannot read `%s': %s"), dest_dev->disk->name,
grub_errmsg);
if (grub_memcmp (buf, ptr, GRUB_DISK_SECTOR_SIZE) != 0)
grub_util_error ("%s", _("blocklists are invalid"));
ptr += GRUB_DISK_SECTOR_SIZE;
len -= GRUB_DISK_SECTOR_SIZE;
block = first_block;
while (block->len)
{
size_t cur = grub_target_to_host16 (block->len) << GRUB_DISK_SECTOR_BITS;
blk = grub_target_to_host64 (block->start);
if (cur > len)
cur = len;
err = grub_disk_read (dest_dev->disk, blk, 0, cur, buf);
if (err)
grub_util_error (_("cannot read `%s': %s"), dest_dev->disk->name,
grub_errmsg);
if (grub_memcmp (buf, ptr, cur) != 0)
grub_util_error ("%s", _("blocklists are invalid"));
ptr += cur;
len -= cur;
block--;
if ((char *) block <= core_img)
grub_util_error ("%s", _("no terminator in the core image"));
}
root_dev->disk->partition = container;
free (buf);
}
#ifdef GRUB_SETUP_BIOS
finish:
#endif
/* Write the boot image onto the disk. */
if (grub_disk_write (dest_dev->disk, BOOT_SECTOR,
0, GRUB_DISK_SECTOR_SIZE, boot_img))
grub_util_error ("%s", grub_errmsg);
grub_util_biosdisk_flush (root_dev->disk);
grub_util_biosdisk_flush (dest_dev->disk);
free (core_path);
free (core_img);
free (boot_img);
grub_device_close (dest_dev);
grub_device_close (root_dev);
}
static struct argp_option options[] = {
{"boot-image", 'b', N_("FILE"), 0,
N_("use FILE as the boot image [default=%s]"), 0},
{"core-image", 'c', N_("FILE"), 0,
N_("use FILE as the core image [default=%s]"), 0},
{"directory", 'd', N_("DIR"), 0,
N_("use GRUB files in the directory DIR [default=%s]"), 0},
{"device-map", 'm', N_("FILE"), 0,
N_("use FILE as the device map [default=%s]"), 0},
{"force", 'f', 0, 0,
N_("install even if problems are detected"), 0},
{"skip-fs-probe",'s',0, 0,
N_("do not probe for filesystems in DEVICE"), 0},
{"verbose", 'v', 0, 0, N_("print verbose messages."), 0},
{"allow-floppy", 'a', 0, 0,
N_("make the drive also bootable as floppy (default for fdX devices). May break on some BIOSes."), 0},
{ 0, 0, 0, 0, 0, 0 }
};
static char *
help_filter (int key, const char *text, void *input __attribute__ ((unused)))
{
switch (key)
{
case 'b':
return xasprintf (text, DEFAULT_BOOT_FILE);
case 'c':
return xasprintf (text, DEFAULT_CORE_FILE);
case 'd':
return xasprintf (text, DEFAULT_DIRECTORY);
case 'm':
return xasprintf (text, DEFAULT_DEVICE_MAP);
default:
return (char *) text;
}
}
struct arguments
{
char *boot_file;
char *core_file;
char *dir;
char *dev_map;
int force;
int fs_probe;
int allow_floppy;
char *device;
};
static error_t
argp_parser (int key, char *arg, struct argp_state *state)
{
/* Get the input argument from argp_parse, which we
know is a pointer to our arguments structure. */
struct arguments *arguments = state->input;
switch (key)
{
case 'a':
arguments->allow_floppy = 1;
break;
case 'b':
if (arguments->boot_file)
free (arguments->boot_file);
arguments->boot_file = xstrdup (arg);
break;
case 'c':
if (arguments->core_file)
free (arguments->core_file);
arguments->core_file = xstrdup (arg);
break;
case 'd':
if (arguments->dir)
free (arguments->dir);
arguments->dir = xstrdup (arg);
break;
case 'm':
if (arguments->dev_map)
free (arguments->dev_map);
arguments->dev_map = xstrdup (arg);
break;
case 'f':
arguments->force = 1;
break;
case 's':
arguments->fs_probe = 0;
break;
case 'v':
verbosity++;
break;
case ARGP_KEY_ARG:
if (state->arg_num == 0)
arguments->device = xstrdup(arg);
else
{
/* Too many arguments. */
fprintf (stderr, _("Unknown extra argument `%s'."), arg);
fprintf (stderr, "\n");
argp_usage (state);
}
break;
case ARGP_KEY_NO_ARGS:
fprintf (stderr, "%s", _("No device is specified.\n"));
argp_usage (state);
exit (1);
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
static struct argp argp = {
options, argp_parser, N_("DEVICE"),
"\n"N_("\
Set up images to boot from DEVICE.\n\
\n\
You should not normally run this program directly. Use grub-install instead.")
"\v"N_("\
DEVICE must be an OS device (e.g. /dev/sda)."),
NULL, help_filter, NULL
};
static char *
get_device_name (char *dev)
{
size_t len = strlen (dev);
if (dev[0] != '(' || dev[len - 1] != ')')
return 0;
dev[len - 1] = '\0';
return dev + 1;
}
int
main (int argc, char *argv[])
{
char *root_dev = NULL;
char *dest_dev = NULL;
struct arguments arguments;
set_program_name (argv[0]);
grub_util_init_nls ();
/* Default option values. */
memset (&arguments, 0, sizeof (struct arguments));
arguments.fs_probe = 1;
/* Parse our arguments */
if (argp_parse (&argp, argc, argv, 0, 0, &arguments) != 0)
{
fprintf (stderr, "%s", _("Error in parsing command line arguments\n"));
exit(1);
}
#ifdef GRUB_SETUP_SPARC64
arguments.force = 1;
#endif
if (verbosity > 1)
grub_env_set ("debug", "all");
/* Initialize the emulated biosdisk driver. */
grub_util_biosdisk_init (arguments.dev_map ? : DEFAULT_DEVICE_MAP);
/* Initialize all modules. */
grub_init_all ();
grub_gcry_init_all ();
grub_lvm_fini ();
grub_mdraid09_fini ();
grub_mdraid1x_fini ();
grub_diskfilter_fini ();
grub_diskfilter_init ();
grub_mdraid09_init ();
grub_mdraid1x_init ();
grub_lvm_init ();
dest_dev = get_device_name (arguments.device);
if (! dest_dev)
{
/* Possibly, the user specified an OS device file. */
dest_dev = grub_util_get_grub_dev (arguments.device);
if (! dest_dev)
{
char *program = xstrdup(program_name);
fprintf (stderr, _("Invalid device `%s'.\n"), arguments.device);
argp_help (&argp, stderr, ARGP_HELP_STD_USAGE, program);
free(program);
exit(1);
}
grub_util_info ("transformed OS device `%s' into GRUB device `%s'",
arguments.device, dest_dev);
}
else
{
/* For simplicity. */
dest_dev = xstrdup (dest_dev);
grub_util_info ("Using `%s' as GRUB device", dest_dev);
}
/* Do the real work. */
setup (arguments.dir ? : DEFAULT_DIRECTORY,
arguments.boot_file ? : DEFAULT_BOOT_FILE,
arguments.core_file ? : DEFAULT_CORE_FILE,
dest_dev, arguments.force,
arguments.fs_probe, arguments.allow_floppy);
/* Free resources. */
grub_fini_all ();
grub_util_biosdisk_fini ();
free (arguments.boot_file);
free (arguments.core_file);
free (arguments.dir);
free (arguments.dev_map);
free (arguments.device);
free (root_dev);
free (dest_dev);
return 0;
}
Reference in New Issue View Git Blame Copy Permalink