103 lines
2.2 KiB
C
103 lines
2.2 KiB
C
/*
|
|
* read_bb --- read the bad blocks inode
|
|
*
|
|
* Copyright (C) 1994 Theodore Ts'o.
|
|
*
|
|
* %Begin-Header%
|
|
* This file may be redistributed under the terms of the GNU Library
|
|
* General Public License, version 2.
|
|
* %End-Header%
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#if HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
#include <fcntl.h>
|
|
#include <time.h>
|
|
#if HAVE_SYS_STAT_H
|
|
#include <sys/stat.h>
|
|
#endif
|
|
#if HAVE_SYS_TYPES_H
|
|
#include <sys/types.h>
|
|
#endif
|
|
|
|
#include "ext2_fs.h"
|
|
#include "ext2fs.h"
|
|
|
|
struct read_bb_record {
|
|
ext2_badblocks_list bb_list;
|
|
errcode_t err;
|
|
};
|
|
|
|
/*
|
|
* Helper function for ext2fs_read_bb_inode()
|
|
*/
|
|
#ifdef __TURBOC__
|
|
#pragma argsused
|
|
#endif
|
|
static int mark_bad_block(ext2_filsys fs, blk_t *block_nr,
|
|
e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
|
|
blk_t ref_block EXT2FS_ATTR((unused)),
|
|
int ref_offset EXT2FS_ATTR((unused)),
|
|
void *priv_data)
|
|
{
|
|
struct read_bb_record *rb = (struct read_bb_record *) priv_data;
|
|
|
|
if (blockcnt < 0)
|
|
return 0;
|
|
|
|
if ((*block_nr < fs->super->s_first_data_block) ||
|
|
(*block_nr >= ext2fs_blocks_count(fs->super)))
|
|
return 0; /* Ignore illegal blocks */
|
|
|
|
rb->err = ext2fs_badblocks_list_add(rb->bb_list, *block_nr);
|
|
if (rb->err)
|
|
return BLOCK_ABORT;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Reads the current bad blocks from the bad blocks inode.
|
|
*/
|
|
errcode_t ext2fs_read_bb_inode(ext2_filsys fs, ext2_badblocks_list *bb_list)
|
|
{
|
|
errcode_t retval;
|
|
struct read_bb_record rb;
|
|
struct ext2_inode inode;
|
|
blk_t numblocks;
|
|
|
|
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
|
|
|
|
if (!*bb_list) {
|
|
retval = ext2fs_read_inode(fs, EXT2_BAD_INO, &inode);
|
|
if (retval)
|
|
return retval;
|
|
numblocks = inode.i_blocks;
|
|
if (!(ext2fs_has_feature_huge_file(fs->super) &&
|
|
(inode.i_flags & EXT4_HUGE_FILE_FL)))
|
|
numblocks = numblocks / (fs->blocksize / 512);
|
|
numblocks += 20;
|
|
if (numblocks < 50)
|
|
numblocks = 50;
|
|
if (numblocks > 50000)
|
|
numblocks = 500;
|
|
retval = ext2fs_badblocks_list_create(bb_list, numblocks);
|
|
if (retval)
|
|
return retval;
|
|
}
|
|
|
|
rb.bb_list = *bb_list;
|
|
rb.err = 0;
|
|
retval = ext2fs_block_iterate2(fs, EXT2_BAD_INO, BLOCK_FLAG_READ_ONLY,
|
|
0, mark_bad_block, &rb);
|
|
if (retval)
|
|
return retval;
|
|
|
|
return rb.err;
|
|
}
|
|
|
|
|