Luna/kernel/src/fs/devices/BlockDevice.h

#pragma once
#include "fs/StorageCache.h"
#include "fs/devices/Device.h"

class BlockDevice : public Device
{
  public:
    BlockDevice(u64 block_size, u64 num_blocks);

    Result<usize> read(u8* buf, usize offset, usize length) const override;

    virtual Result<void> read_block(Buffer& buf, u64 block) const = 0;

    Result<usize> write(const u8*, usize, usize) override
    {
        return err(ENOTSUP);
    }

    usize size() const override
    {
        return m_block_size * m_num_blocks;
    }

    bool is_block_device() const override
    {
        return true;
    }

    Result<usize> block_size() const override
    {
        return m_block_size;
    }

    virtual ~BlockDevice() = default;

  protected:
    mutable StorageCache m_cache;
    u64 m_block_size;
    u64 m_num_blocks;
};