New upstream version 249~rc1

[systemd.git] / src / shared / sleep-config.h

/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once

#include <linux/fiemap.h>
#include "time-util.h"

typedef enum SleepOperation {
        SLEEP_SUSPEND,
        SLEEP_HIBERNATE,
        SLEEP_HYBRID_SLEEP,
        SLEEP_SUSPEND_THEN_HIBERNATE,
        _SLEEP_OPERATION_MAX,
        _SLEEP_OPERATION_INVALID = -EINVAL,
} SleepOperation;

typedef struct SleepConfig {
        bool allow[_SLEEP_OPERATION_MAX];
        char **modes[_SLEEP_OPERATION_MAX];
        char **states[_SLEEP_OPERATION_MAX];
        usec_t hibernate_delay_sec;
} SleepConfig;

SleepConfig* free_sleep_config(SleepConfig *sc);
DEFINE_TRIVIAL_CLEANUP_FUNC(SleepConfig*, free_sleep_config);

/* entry in /proc/swaps */
typedef struct SwapEntry {
        char *device;
        char *type;
        uint64_t size;
        uint64_t used;
        int priority;
} SwapEntry;

SwapEntry* swap_entry_free(SwapEntry *se);
DEFINE_TRIVIAL_CLEANUP_FUNC(SwapEntry*, swap_entry_free);

/*
 * represents values for /sys/power/resume & /sys/power/resume_offset
 * and the matching /proc/swap entry.
 */
typedef struct HibernateLocation {
        dev_t devno;
        uint64_t offset;
        SwapEntry *swap;
} HibernateLocation;

HibernateLocation* hibernate_location_free(HibernateLocation *hl);
DEFINE_TRIVIAL_CLEANUP_FUNC(HibernateLocation*, hibernate_location_free);

int read_fiemap(int fd, struct fiemap **ret);
int parse_sleep_config(SleepConfig **sleep_config);
int find_hibernate_location(HibernateLocation **ret_hibernate_location);

int can_sleep(SleepOperation operation);
int can_sleep_disk(char **types);
int can_sleep_state(char **types);

const char* sleep_operation_to_string(SleepOperation s) _const_;
SleepOperation sleep_operation_from_string(const char *s) _pure_;