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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (c) 2019 Linus Walleij <linus.walleij@linaro.org>
* Copyright (c) 2023 Linux Test Project
*/
#ifndef LTP_IOPRIO_H
#define LTP_IOPRIO_H
#include "lapi/ioprio.h"
#include "lapi/syscalls.h"
static const char * const to_class_str[] = {
[IOPRIO_CLASS_NONE] = "NONE",
[IOPRIO_CLASS_RT] = "REALTIME",
[IOPRIO_CLASS_BE] = "BEST-EFFORT",
[IOPRIO_CLASS_IDLE] = "IDLE"
};
static inline int sys_ioprio_get(int which, int who)
{
return tst_syscall(__NR_ioprio_get, which, who);
}
static inline int sys_ioprio_set(int which, int who, int ioprio)
{
return tst_syscall(__NR_ioprio_set, which, who, ioprio);
}
/* Priority range from 0 (highest) to IOPRIO_PRIO_NUM (lowest) */
static inline int prio_in_range(int prio)
{
if ((prio < 0) || (prio >= IOPRIO_PRIO_NUM))
return 0;
return 1;
}
/* Priority range from 0 to 3 using the enum */
static inline int class_in_range(int class)
{
if ((class < IOPRIO_CLASS_NONE) || (class > IOPRIO_CLASS_IDLE))
return 0;
return 1;
}
static inline void ioprio_check_setting(int class, int prio, int report)
{
int res;
int newclass, newprio;
res = sys_ioprio_get(IOPRIO_WHO_PROCESS, 0);
if (res == -1) {
tst_res(TFAIL | TTERRNO,
"reading back prio failed");
return;
}
newclass = IOPRIO_PRIO_CLASS(res);
newprio = IOPRIO_PRIO_LEVEL(res);
if (newclass != class)
tst_res(TFAIL,
"wrong class after setting, expected %s got %s",
to_class_str[class],
to_class_str[newclass]);
else if (newprio != prio)
tst_res(TFAIL,
"wrong prio after setting, expected %d got %d",
prio, newprio);
else if (report)
tst_res(TPASS, "ioprio_set new class %s, new prio %d",
to_class_str[newclass],
newprio);
}
#endif /* LTP_IOPRIO_H */
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