102 lines
2.9 KiB
C
102 lines
2.9 KiB
C
/*
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* Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
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* Copyright (c) 2014-2017 The strace developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "defs.h"
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#include "xstring.h"
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enum {
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IOPRIO_WHO_PROCESS = 1,
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IOPRIO_WHO_PGRP,
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IOPRIO_WHO_USER
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};
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#include "xlat/ioprio_who.h"
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enum {
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IOPRIO_CLASS_NONE,
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IOPRIO_CLASS_RT,
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IOPRIO_CLASS_BE,
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IOPRIO_CLASS_IDLE
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};
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#include "xlat/ioprio_class.h"
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#define IOPRIO_CLASS_SHIFT (13)
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#define IOPRIO_PRIO_MASK ((1ul << IOPRIO_CLASS_SHIFT) - 1)
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#define IOPRIO_PRIO_CLASS(mask) ((mask) >> IOPRIO_CLASS_SHIFT)
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#define IOPRIO_PRIO_DATA(mask) ((mask) & IOPRIO_PRIO_MASK)
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static const char *
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sprint_ioprio(unsigned int ioprio)
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{
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static char outstr[256];
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const char *str;
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unsigned int class, data;
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class = IOPRIO_PRIO_CLASS(ioprio);
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data = IOPRIO_PRIO_DATA(ioprio);
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str = xlookup(ioprio_class, class);
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if (str)
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xsprintf(outstr, "IOPRIO_PRIO_VALUE(%s, %d)", str, data);
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else
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xsprintf(outstr, "IOPRIO_PRIO_VALUE(%#x /* %s */, %d)",
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class, "IOPRIO_CLASS_???", data);
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return outstr;
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}
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SYS_FUNC(ioprio_get)
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{
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if (entering(tcp)) {
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/* int which */
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printxval(ioprio_who, tcp->u_arg[0], "IOPRIO_WHO_???");
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/* int who */
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tprintf(", %d", (int) tcp->u_arg[1]);
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return 0;
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} else {
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if (syserror(tcp))
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return 0;
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tcp->auxstr = sprint_ioprio(tcp->u_rval);
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return RVAL_STR;
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}
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}
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SYS_FUNC(ioprio_set)
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{
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/* int which */
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printxval(ioprio_who, tcp->u_arg[0], "IOPRIO_WHO_???");
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/* int who */
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tprintf(", %d, ", (int) tcp->u_arg[1]);
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/* int ioprio */
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tprints(sprint_ioprio(tcp->u_arg[2]));
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return RVAL_DECODED;
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}
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