The VSD-DRIVER is what interfaces directly with the VSD (Virtual Storage Drive) which is an empty (but allocated) file, this file is viewed by VFS as a storage drive and thus treated as such.
void read_block_to_buffer(int block_index);Reads a full block from VSD into the central read buffer, block_index is 0 indexed.
void write_to_block(int block_index, int offset, char *buf, int size);Writes the contents of buf into the VSD at block_index at a specific offset within the block (both zero indexed).
char *return_buffer();Returns the central read buffer.
off_t return_vsd_size();Returns the total VSD size in bytes.
struct driver_status return_driver_status();Returns DRIVER_STATUS struct, which contains the latest DRIVER_STATUS entry.
sll_headnode_t *return_driver_status_log();Returns a pointer to the head of the DRIVER_STATUS_LOG singly linked list, the list contains the full log of all DRIVER_STATUS entries for the entire runtime duration.
void initialize_driver_status();Allocates memory for DRIVER_STATUS.status and creates a new DRIVER_STATUS_LOG singly linked list.
void free_driver_status();Frees both DRIVER_STATUS.status and the entire DRIVER_STATUS_LOG from memory.
(note: DRIVER_STATUS_LOG uses a linked list I wrote in a separate project, for the API check https://github.com/ihiiro/singly_linked_list)