linuxinstall/src/disk.h

#pragma once

#include "utils.h"

/// @brief The disk information structure.
typedef struct {
	/// @brief The virtual size of the disk, in bytes.
	uint64_t size;
	/// @brief The actual size of the disk, in bytes.
	uint64_t allocated;
	/// @brief The path to the backing file of the disk, or NULL if the disk is not backed.
	char* backing_path;
} disk_info_t;

/// @brief Creates a root disk (empty disk) at the given path with the given size.
/// @param path The path to create the disk at. Any existing file at this path will be overwritten.
/// @param size The size of the disk to create.
/// @return The result of the operation.
result_t create_root_disk(const char* path, uint64_t size);

/// @brief Creates a backed disk at the given path with the given backing path.
/// @param path The path to create the disk at. Any existing file at this path will be overwritten.
/// @param backing_path The path to the backing file to use for the disk.
/// @return The result of the operation.
result_t create_backed_disk(const char* path, const char* backing_path);

/// @brief Trims (removes unused space) the given disk.
/// @param path The path to the disk to trim.
/// @return The result of the operation.
result_t trim_disk(const char* path);

/// @brief Resets the given disk to its original state.
/// @param path The path to the disk to reset.
/// @return The result of the operation.
result_t reset_disk(const char* path);

/// @brief Changes the backing of the given disk to the given backing path. This call does not change the contents of the disk, but only the backing file path.
/// @param path The path to the disk to reback.
/// @param backing_path The path to the new backing file to use for the disk.
/// @return The result of the operation.
result_t reback_disk(const char* path, const char* backing_path);

/// @brief Gets the disk information of the disk at the given path.
/// @param _info The disk information pointer to store the result in. The caller is responsible for freeing the disk information.
/// @param path The path to the disk to get the information of.
/// @return The result of the operation.
result_t get_disk_info(disk_info_t* _info, const char* path);

/// @brief Frees the given disk information.
/// @param _info The disk information to free.
void free_disk_info(disk_info_t* _info);