24443b5a47
* disk/raid5_recover.c (grub_raid5_recover): Revert conversion to grub_zalloc(), it was erroneous. Reported by Bean <bean123ch@gmail.com>
72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
/* raid5_recover.c - module to recover from faulty RAID4/5 arrays. */
|
|
/*
|
|
* GRUB -- GRand Unified Bootloader
|
|
* Copyright (C) 2006,2007,2008 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 <grub/dl.h>
|
|
#include <grub/disk.h>
|
|
#include <grub/mm.h>
|
|
#include <grub/err.h>
|
|
#include <grub/misc.h>
|
|
#include <grub/raid.h>
|
|
|
|
static grub_err_t
|
|
grub_raid5_recover (struct grub_raid_array *array, int disknr,
|
|
char *buf, grub_disk_addr_t sector, int size)
|
|
{
|
|
char *buf2;
|
|
int i;
|
|
|
|
size <<= GRUB_DISK_SECTOR_BITS;
|
|
buf2 = grub_malloc (size);
|
|
if (!buf2)
|
|
return grub_errno;
|
|
|
|
grub_memset (buf, 0, size);
|
|
|
|
for (i = 0; i < (int) array->total_devs; i++)
|
|
{
|
|
grub_err_t err;
|
|
|
|
if (i == disknr)
|
|
continue;
|
|
|
|
err = grub_disk_read (array->device[i], sector, 0, size, buf2);
|
|
|
|
if (err)
|
|
{
|
|
grub_free (buf2);
|
|
return err;
|
|
}
|
|
|
|
grub_raid_block_xor (buf, buf2, size);
|
|
}
|
|
|
|
grub_free (buf2);
|
|
|
|
return GRUB_ERR_NONE;
|
|
}
|
|
|
|
GRUB_MOD_INIT(raid5rec)
|
|
{
|
|
grub_raid5_recover_func = grub_raid5_recover;
|
|
}
|
|
|
|
GRUB_MOD_FINI(raid5rec)
|
|
{
|
|
grub_raid5_recover_func = 0;
|
|
}
|