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/*
* Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "defs.h"
enum {
IOPRIO_WHO_PROCESS = 1,
IOPRIO_WHO_PGRP,
IOPRIO_WHO_USER
};
#include "xlat/ioprio_who.h"
enum {
IOPRIO_CLASS_NONE,
IOPRIO_CLASS_RT,
IOPRIO_CLASS_BE,
IOPRIO_CLASS_IDLE
};
#include "xlat/ioprio_class.h"
#define IOPRIO_CLASS_SHIFT (13)
#define IOPRIO_PRIO_MASK ((1ul << IOPRIO_CLASS_SHIFT) - 1)
#define IOPRIO_PRIO_CLASS(mask) ((mask) >> IOPRIO_CLASS_SHIFT)
#define IOPRIO_PRIO_DATA(mask) ((mask) & IOPRIO_PRIO_MASK)
static const char *
sprint_ioprio(unsigned int ioprio)
{
static char outstr[256];
const char *str;
unsigned int class, data;
class = IOPRIO_PRIO_CLASS(ioprio);
data = IOPRIO_PRIO_DATA(ioprio);
str = xlookup(ioprio_class, class);
if (str)
sprintf(outstr, "IOPRIO_PRIO_VALUE(%s, %d)", str, data);
else
sprintf(outstr, "IOPRIO_PRIO_VALUE(%#x /* %s */, %d)",
class, "IOPRIO_CLASS_???", data);
return outstr;
}
SYS_FUNC(ioprio_get)
{
if (entering(tcp)) {
/* int which */
printxval(ioprio_who, tcp->u_arg[0], "IOPRIO_WHO_???");
/* int who */
tprintf(", %d", (int) tcp->u_arg[1]);
return 0;
} else {
if (syserror(tcp))
return 0;
tcp->auxstr = sprint_ioprio(tcp->u_rval);
return RVAL_STR;
}
}
SYS_FUNC(ioprio_set)
{
/* int which */
printxval(ioprio_who, tcp->u_arg[0], "IOPRIO_WHO_???");
/* int who */
tprintf(", %d, ", (int) tcp->u_arg[1]);
/* int ioprio */
tprints(sprint_ioprio(tcp->u_arg[2]));
return RVAL_DECODED;
}
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