int block_init(void)
{
printk(KERN_INFO "initializing block device module\n");
//
spin_lock_init(&lock);
//
size = NSECTORS * LOGICAL_BLOCK_SIZE;
data = vmalloc(size);
if (data == NULL) {
printk(KERN_INFO "block_init: could not malloc a block of size %lu\n", size);
return -ENOMEM;
}
//
queue = blk_init_queue(block_request, &lock);
if (queue == NULL) {
printk(KERN_INFO "block_init: could not initialize blk queue\n");
block_cleanup();
return -ENOMEM;
}
//
blk_queue_logical_block_size(queue, LOGICAL_BLOCK_SIZE);
//
major_number = register_blkdev(major_number, DEVICE_NAME);
if (major_number < 0) {
printk(KERN_INFO "block_init: could not register blk device, major number=%d\n", major_number);
block_cleanup();
return -ENOMEM;
}
gdisk = alloc_disk(16);
if (!gdisk) {
printk(KERN_INFO "block_init: could not alloc gdisk\n");
block_cleanup();
return -ENOMEM;
}
//
gdisk->major = major_number;
//
gdisk->first_minor = 0;
//
gdisk->fops = &block_ops;
//
gdisk->private_data = &data;
//
gdisk->queue = queue;
//
strcpy(gdisk->disk_name, DISK_NAME);
//
set_capacity(gdisk, 0);
//
add_disk(gdisk);
printk(KERN_INFO "block_init: added gendisk\n");
set_capacity(gdisk, NSECTORS);
printk(KERN_INFO "block_init: set capacity on gendisk to %d sectors\n", NSECTORS);
return 0;
}
void mxheap_cleanup( MxHeap *h )
{
block_cleanup( &(h->data) );
}
