Branch data Line data Source code
1 : : /*
2 : : * Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
3 : : * Copyright (c) 2014-2017 The strace developers.
4 : : * All rights reserved.
5 : : *
6 : : * Redistribution and use in source and binary forms, with or without
7 : : * modification, are permitted provided that the following conditions
8 : : * are met:
9 : : * 1. Redistributions of source code must retain the above copyright
10 : : * notice, this list of conditions and the following disclaimer.
11 : : * 2. Redistributions in binary form must reproduce the above copyright
12 : : * notice, this list of conditions and the following disclaimer in the
13 : : * documentation and/or other materials provided with the distribution.
14 : : * 3. The name of the author may not be used to endorse or promote products
15 : : * derived from this software without specific prior written permission.
16 : : *
17 : : * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 : : * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 : : * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 : : * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 : : * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 : : * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 : : * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 : : * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 : : * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 : : * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 : : */
28 : :
29 : : #include "defs.h"
30 : :
31 : : enum {
32 : : IOPRIO_WHO_PROCESS = 1,
33 : : IOPRIO_WHO_PGRP,
34 : : IOPRIO_WHO_USER
35 : : };
36 : :
37 : : #include "xlat/ioprio_who.h"
38 : :
39 : : enum {
40 : : IOPRIO_CLASS_NONE,
41 : : IOPRIO_CLASS_RT,
42 : : IOPRIO_CLASS_BE,
43 : : IOPRIO_CLASS_IDLE
44 : : };
45 : :
46 : : #include "xlat/ioprio_class.h"
47 : :
48 : : #define IOPRIO_CLASS_SHIFT (13)
49 : : #define IOPRIO_PRIO_MASK ((1ul << IOPRIO_CLASS_SHIFT) - 1)
50 : :
51 : : #define IOPRIO_PRIO_CLASS(mask) ((mask) >> IOPRIO_CLASS_SHIFT)
52 : : #define IOPRIO_PRIO_DATA(mask) ((mask) & IOPRIO_PRIO_MASK)
53 : :
54 : : static const char *
55 : 6 : sprint_ioprio(unsigned int ioprio)
56 : : {
57 : : static char outstr[256];
58 : : const char *str;
59 : : unsigned int class, data;
60 : :
61 : 6 : class = IOPRIO_PRIO_CLASS(ioprio);
62 : 6 : data = IOPRIO_PRIO_DATA(ioprio);
63 : 6 : str = xlookup(ioprio_class, class);
64 [ + + ]: 6 : if (str)
65 : 4 : sprintf(outstr, "IOPRIO_PRIO_VALUE(%s, %d)", str, data);
66 : : else
67 : 2 : sprintf(outstr, "IOPRIO_PRIO_VALUE(%#x /* %s */, %d)",
68 : : class, "IOPRIO_CLASS_???", data);
69 : :
70 : 6 : return outstr;
71 : : }
72 : :
73 : 8 : SYS_FUNC(ioprio_get)
74 : : {
75 [ + + ]: 8 : if (entering(tcp)) {
76 : : /* int which */
77 : 4 : printxval(ioprio_who, tcp->u_arg[0], "IOPRIO_WHO_???");
78 : : /* int who */
79 : 4 : tprintf(", %d", (int) tcp->u_arg[1]);
80 : 4 : return 0;
81 : : } else {
82 [ + + ]: 4 : if (syserror(tcp))
83 : : return 0;
84 : :
85 : 2 : tcp->auxstr = sprint_ioprio(tcp->u_rval);
86 : 2 : return RVAL_STR;
87 : : }
88 : : }
89 : :
90 : 4 : SYS_FUNC(ioprio_set)
91 : : {
92 : : /* int which */
93 : 4 : printxval(ioprio_who, tcp->u_arg[0], "IOPRIO_WHO_???");
94 : : /* int who */
95 : 4 : tprintf(", %d, ", (int) tcp->u_arg[1]);
96 : : /* int ioprio */
97 : 4 : tprints(sprint_ioprio(tcp->u_arg[2]));
98 : :
99 : 4 : return RVAL_DECODED;
100 : : }
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