initrd.h

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#pragma once
 
#include "di/util/prelude.h"
 
namespace iris::initrd {
using UUID = di::UUID;
 
constexpr inline auto signature = "b2bf882c-c789-4728-b4a0-b3b944078e29"_uuid;
constexpr inline auto block_size = 4096_usize;
constexpr inline auto directory_entry_align = 8_usize;
 
// NOTE: keep this in sync with the iris::MetadataType enum.
enum class Type : u8 {
    Regular = 1,
    Directory = 2,
};
 
struct DirectoryEntry {
    u32 block_offset;
    u32 byte_size;
    u16 next_entry;
    Type type;
    u8 name_length;
 
    auto name() const -> di::TransparentStringView {
        return di::TransparentStringView { reinterpret_cast<char const*>(this + 1), name_length };
    }
};
 
struct SuperBlock {
    UUID signature;
    UUID generation;
    u64 created_at_seconds_since_epoch;
    u32 version;
    u32 total_size;
    DirectoryEntry root_directory;
};
}