/*
* Used to find the block that holds the address search
* within a file
*/
static int ifs_find_block(int vsize, int block, int search, int pos)
{
IFSBlock parent;
ifs_get_block(block, &parent);
if(search < pos + vsize)
return block;
else
return ifs_find_block(vsize, parent.next, search, pos + parent.size);
}
/*
* Frees a block
*/
static int ifs_free_block(struct device *dev, int block)
{
struct ifs_volume_hdr hdr;
struct ifs_block blk;
ifs_get_block(dev, block, &blk);
device_read(dev, &hdr, sizeof(struct ifs_volume_hdr), 0);
blk.state = IFS_BLOCK_FREE;
device_write(dev, &blk, sizeof(struct ifs_block), sizeof(struct ifs_volume_hdr) + (block * sizeof(struct ifs_block)));
}
/*
* Frees all data associated with a file
*/
static int ifs_free_blockgroup(struct device *dev, struct ifs_entry *entry)
{
int blk = entry->data_index;
do {
struct ifs_block block;
ifs_get_block(dev, blk, &block);
ifs_free_block(dev, blk);
blk = block.next;
} while(blk);
}