77 lines
2.0 KiB
C
77 lines
2.0 KiB
C
/* raid5_recover.c - module to recover from faulty RAID4/5 arrays. */
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/*
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* VAS_EBOOT -- GRand Unified Bootloader
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* Copyright (C) 2006,2007,2008 Free Software Foundation, Inc.
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*
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* VAS_EBOOT 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 3 of the License, or
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* (at your option) any later version.
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*
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* VAS_EBOOT 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 VAS_EBOOT. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <VasEBoot/dl.h>
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#include <VasEBoot/disk.h>
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#include <VasEBoot/mm.h>
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#include <VasEBoot/err.h>
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#include <VasEBoot/misc.h>
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#include <VasEBoot/diskfilter.h>
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#include <VasEBoot/crypto.h>
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VAS_EBOOT_MOD_LICENSE ("GPLv3+");
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static VasEBoot_err_t
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VasEBoot_raid5_recover (struct VasEBoot_diskfilter_segment *array, int disknr,
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char *buf, VasEBoot_disk_addr_t sector, VasEBoot_size_t size)
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{
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char *buf2;
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int i;
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size <<= VAS_EBOOT_DISK_SECTOR_BITS;
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buf2 = VasEBoot_malloc (size);
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if (!buf2)
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return VasEBoot_errno;
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VasEBoot_memset (buf, 0, size);
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for (i = 0; i < (int) array->node_count; i++)
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{
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VasEBoot_err_t err;
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if (i == disknr)
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continue;
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err = VasEBoot_diskfilter_read_node (&array->nodes[i], sector,
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size >> VAS_EBOOT_DISK_SECTOR_BITS, buf2);
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if (err)
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{
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VasEBoot_free (buf2);
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return err;
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}
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VasEBoot_crypto_xor (buf, buf, buf2, size);
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}
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VasEBoot_free (buf2);
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return VAS_EBOOT_ERR_NONE;
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}
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VAS_EBOOT_MOD_INIT(raid5rec)
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{
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VasEBoot_raid5_recover_func = VasEBoot_raid5_recover;
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}
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VAS_EBOOT_MOD_FINI(raid5rec)
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{
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VasEBoot_raid5_recover_func = 0;
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}
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