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#include <lib/base/ioprio.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <getopt.h>
#include <unistd.h>
#include <sys/ptrace.h>
#include <asm/unistd.h>
#include <lib/base/eerror.h>
extern "C" int sys_ioprio_set(int, int, int);
extern "C" int sys_ioprio_get(int, int);
#if defined(__i386__)
#define __NR_ioprio_set 289
#define __NR_ioprio_get 290
#elif defined(__ppc__) || defined(__powerpc__)
#define __NR_ioprio_set 273
#define __NR_ioprio_get 274
#elif defined(__x86_64__)
#define __NR_ioprio_set 251
#define __NR_ioprio_get 252
#elif defined(__ia64__)
#define __NR_ioprio_set 1274
#define __NR_ioprio_get 1275
#elif defined(__mips__)
#define __NR_ioprio_set 4284
#define __NR_ioprio_get 4285
#else
#error "Unsupported arch"
#endif
#if defined(_syscall3) && defined(_syscall2)
_syscall3(int, ioprio_set, int, which, int, who, int, ioprio);
_syscall2(int, ioprio_get, int, which, int, who);
#else
static inline int ioprio_set(int which, int who, int ioprio)
{
return syscall(__NR_ioprio_set, which, who, ioprio);
}
static inline int ioprio_get(int which, int who)
{
return syscall(__NR_ioprio_get, which, who);
}
#endif
#define IOPRIO_CLASS_SHIFT 13
enum {
IOPRIO_WHO_PROCESS = 1,
IOPRIO_WHO_PGRP,
IOPRIO_WHO_USER,
};
const char *to_prio[] = { "none", "realtime", "best-effort", "idle", };
void setIoPrio(int prio_class, int prio)
{
if (prio_class < 0 || prio_class > 3)
{
eDebug("prio class(%d) out of valid range (0..3)", prio_class);
return;
}
if (prio < 0 || prio > 7)
{
eDebug("prio level(%d) out of range (0..7)", prio);
return;
}
if (ioprio_set(IOPRIO_WHO_PROCESS, 0 /*pid 0 .. current process*/, prio | prio_class << IOPRIO_CLASS_SHIFT) == -1)
eDebug("setIoPrio failed (%m) !");
else
eDebug("setIoPrio %s level %d ok", to_prio[prio_class], prio);
}
void printIoPrio()
{
int pid = 0, ioprio = ioprio_get(IOPRIO_WHO_PROCESS, pid);
eDebug("pid=%d, %d", pid, ioprio);
if (ioprio == -1)
eDebug("ioprio_get(%m)");
else {
int ioprio_class = ioprio >> IOPRIO_CLASS_SHIFT;
ioprio = ioprio & 0xff;
eDebug("%s: prio %d", to_prio[ioprio_class], ioprio);
}
}
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