void testfs_close_super_block(struct super_block *sb) {
testfs_tx_start(sb, TX_UMOUNT);
// write sb->sb of type dsuper_block to disk at offset 0.
testfs_write_super_block(sb);
// assume there are no entries in the inode hash table.
// delete the 256 hash size inode hash table
inode_hash_destroy();
if (sb->inode_freemap) {
// write inode map to disk.
write_blocks(sb, bitmap_getdata(sb->inode_freemap),
sb->sb.inode_freemap_start, INODE_FREEMAP_SIZE);
// free in memory bitmap file.
bitmap_destroy(sb->inode_freemap);
sb->inode_freemap = NULL;
}
if (sb->block_freemap) {
// write inode freemap to disk
write_blocks(sb, bitmap_getdata(sb->block_freemap),
sb->sb.block_freemap_start, BLOCK_FREEMAP_SIZE);
// destroy inode freemap
bitmap_destroy(sb->block_freemap);
sb->block_freemap = NULL;
}
testfs_tx_commit(sb, TX_UMOUNT);
fflush(sb->dev);
fclose(sb->dev);
sb->dev = NULL;
// free in memory data structure sb superblock
free(sb);
}
void
testfs_close_super_block(struct super_block *sb)
{
testfs_write_super_block(sb);
inode_hash_destroy();
if (sb->inode_freemap) {
write_blocks(sb, bitmap_getdata(sb->inode_freemap),
sb->sb.inode_freemap_start, INODE_FREEMAP_SIZE);
bitmap_destroy(sb->inode_freemap);
sb->inode_freemap = NULL;
}
if (sb->block_freemap) {
write_blocks(sb, bitmap_getdata(sb->block_freemap),
sb->sb.block_freemap_start, BLOCK_FREEMAP_SIZE);
bitmap_destroy(sb->block_freemap);
sb->block_freemap = NULL;
}
fflush(sb->dev);
fclose(sb->dev);
sb->dev = NULL;
free(sb);
}
