linux-imx

/*

 * super.c

 *

 * Copyright (C) 2001-2002 Will Dyson <will_dyson@pobox.com>

 *

 * Licensed under the GNU GPL. See the file COPYING for details.

 *

 */

​

#include <linux/fs.h>

#include <asm/page.h> /* for PAGE_SIZE */

​

#include "befs.h"

#include "super.h"

​

/*

 * befs_load_sb -- Read from disk and properly byteswap all the fields

 * of the befs superblock

 */

int

befs_load_sb(struct super_block *sb, befs_super_block *disk_sb)

{

    struct befs_sb_info *befs_sb = BEFS_SB(sb);

​

    /* Check the byte order of the filesystem */

    if (disk_sb->fs_byte_order == BEFS_BYTEORDER_NATIVE_LE)

        befs_sb->byte_order = BEFS_BYTESEX_LE;

    else if (disk_sb->fs_byte_order == BEFS_BYTEORDER_NATIVE_BE)

        befs_sb->byte_order = BEFS_BYTESEX_BE;

​

    befs_sb->magic1 = fs32_to_cpu(sb, disk_sb->magic1);

    befs_sb->magic2 = fs32_to_cpu(sb, disk_sb->magic2);

    befs_sb->magic3 = fs32_to_cpu(sb, disk_sb->magic3);

    befs_sb->block_size = fs32_to_cpu(sb, disk_sb->block_size);

    befs_sb->block_shift = fs32_to_cpu(sb, disk_sb->block_shift);

    befs_sb->num_blocks = fs64_to_cpu(sb, disk_sb->num_blocks);

    befs_sb->used_blocks = fs64_to_cpu(sb, disk_sb->used_blocks);

    befs_sb->inode_size = fs32_to_cpu(sb, disk_sb->inode_size);

​

    befs_sb->blocks_per_ag = fs32_to_cpu(sb, disk_sb->blocks_per_ag);

    befs_sb->ag_shift = fs32_to_cpu(sb, disk_sb->ag_shift);

    befs_sb->num_ags = fs32_to_cpu(sb, disk_sb->num_ags);

​

    befs_sb->flags = fs32_to_cpu(sb, disk_sb->flags);

​

    befs_sb->log_blocks = fsrun_to_cpu(sb, disk_sb->log_blocks);

    befs_sb->log_start = fs64_to_cpu(sb, disk_sb->log_start);

    befs_sb->log_end = fs64_to_cpu(sb, disk_sb->log_end);

​

    befs_sb->root_dir = fsrun_to_cpu(sb, disk_sb->root_dir);

    befs_sb->indices = fsrun_to_cpu(sb, disk_sb->indices);

    befs_sb->nls = NULL;

​

    return BEFS_OK;

}

​

int

befs_check_sb(struct super_block *sb)

{

    struct befs_sb_info *befs_sb = BEFS_SB(sb);

​

    /* Check magic headers of super block */

    if ((befs_sb->magic1 != BEFS_SUPER_MAGIC1)