1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun
3*4882a593Smuzhiyun #include <subcmd/parse-options.h>
4*4882a593Smuzhiyun #include <stdio.h>
5*4882a593Smuzhiyun #include <time.h>
6*4882a593Smuzhiyun #include <strings.h>
7*4882a593Smuzhiyun #include <linux/time64.h>
8*4882a593Smuzhiyun #include "debug.h"
9*4882a593Smuzhiyun #include "clockid.h"
10*4882a593Smuzhiyun #include "record.h"
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun struct clockid_map {
13*4882a593Smuzhiyun const char *name;
14*4882a593Smuzhiyun int clockid;
15*4882a593Smuzhiyun };
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun #define CLOCKID_MAP(n, c) \
18*4882a593Smuzhiyun { .name = n, .clockid = (c), }
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun #define CLOCKID_END { .name = NULL, }
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun /*
24*4882a593Smuzhiyun * Add the missing ones, we need to build on many distros...
25*4882a593Smuzhiyun */
26*4882a593Smuzhiyun #ifndef CLOCK_MONOTONIC_RAW
27*4882a593Smuzhiyun #define CLOCK_MONOTONIC_RAW 4
28*4882a593Smuzhiyun #endif
29*4882a593Smuzhiyun #ifndef CLOCK_BOOTTIME
30*4882a593Smuzhiyun #define CLOCK_BOOTTIME 7
31*4882a593Smuzhiyun #endif
32*4882a593Smuzhiyun #ifndef CLOCK_TAI
33*4882a593Smuzhiyun #define CLOCK_TAI 11
34*4882a593Smuzhiyun #endif
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun static const struct clockid_map clockids[] = {
37*4882a593Smuzhiyun /* available for all events, NMI safe */
38*4882a593Smuzhiyun CLOCKID_MAP("monotonic", CLOCK_MONOTONIC),
39*4882a593Smuzhiyun CLOCKID_MAP("monotonic_raw", CLOCK_MONOTONIC_RAW),
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun /* available for some events */
42*4882a593Smuzhiyun CLOCKID_MAP("realtime", CLOCK_REALTIME),
43*4882a593Smuzhiyun CLOCKID_MAP("boottime", CLOCK_BOOTTIME),
44*4882a593Smuzhiyun CLOCKID_MAP("tai", CLOCK_TAI),
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun /* available for the lazy */
47*4882a593Smuzhiyun CLOCKID_MAP("mono", CLOCK_MONOTONIC),
48*4882a593Smuzhiyun CLOCKID_MAP("raw", CLOCK_MONOTONIC_RAW),
49*4882a593Smuzhiyun CLOCKID_MAP("real", CLOCK_REALTIME),
50*4882a593Smuzhiyun CLOCKID_MAP("boot", CLOCK_BOOTTIME),
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun CLOCKID_END,
53*4882a593Smuzhiyun };
54*4882a593Smuzhiyun
get_clockid_res(clockid_t clk_id,u64 * res_ns)55*4882a593Smuzhiyun static int get_clockid_res(clockid_t clk_id, u64 *res_ns)
56*4882a593Smuzhiyun {
57*4882a593Smuzhiyun struct timespec res;
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun *res_ns = 0;
60*4882a593Smuzhiyun if (!clock_getres(clk_id, &res))
61*4882a593Smuzhiyun *res_ns = res.tv_nsec + res.tv_sec * NSEC_PER_SEC;
62*4882a593Smuzhiyun else
63*4882a593Smuzhiyun pr_warning("WARNING: Failed to determine specified clock resolution.\n");
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun return 0;
66*4882a593Smuzhiyun }
67*4882a593Smuzhiyun
parse_clockid(const struct option * opt,const char * str,int unset)68*4882a593Smuzhiyun int parse_clockid(const struct option *opt, const char *str, int unset)
69*4882a593Smuzhiyun {
70*4882a593Smuzhiyun struct record_opts *opts = (struct record_opts *)opt->value;
71*4882a593Smuzhiyun const struct clockid_map *cm;
72*4882a593Smuzhiyun const char *ostr = str;
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun if (unset) {
75*4882a593Smuzhiyun opts->use_clockid = 0;
76*4882a593Smuzhiyun return 0;
77*4882a593Smuzhiyun }
78*4882a593Smuzhiyun
79*4882a593Smuzhiyun /* no arg passed */
80*4882a593Smuzhiyun if (!str)
81*4882a593Smuzhiyun return 0;
82*4882a593Smuzhiyun
83*4882a593Smuzhiyun /* no setting it twice */
84*4882a593Smuzhiyun if (opts->use_clockid)
85*4882a593Smuzhiyun return -1;
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun opts->use_clockid = true;
88*4882a593Smuzhiyun
89*4882a593Smuzhiyun /* if its a number, we're done */
90*4882a593Smuzhiyun if (sscanf(str, "%d", &opts->clockid) == 1)
91*4882a593Smuzhiyun return get_clockid_res(opts->clockid, &opts->clockid_res_ns);
92*4882a593Smuzhiyun
93*4882a593Smuzhiyun /* allow a "CLOCK_" prefix to the name */
94*4882a593Smuzhiyun if (!strncasecmp(str, "CLOCK_", 6))
95*4882a593Smuzhiyun str += 6;
96*4882a593Smuzhiyun
97*4882a593Smuzhiyun for (cm = clockids; cm->name; cm++) {
98*4882a593Smuzhiyun if (!strcasecmp(str, cm->name)) {
99*4882a593Smuzhiyun opts->clockid = cm->clockid;
100*4882a593Smuzhiyun return get_clockid_res(opts->clockid,
101*4882a593Smuzhiyun &opts->clockid_res_ns);
102*4882a593Smuzhiyun }
103*4882a593Smuzhiyun }
104*4882a593Smuzhiyun
105*4882a593Smuzhiyun opts->use_clockid = false;
106*4882a593Smuzhiyun ui__warning("unknown clockid %s, check man page\n", ostr);
107*4882a593Smuzhiyun return -1;
108*4882a593Smuzhiyun }
109*4882a593Smuzhiyun
clockid_name(clockid_t clk_id)110*4882a593Smuzhiyun const char *clockid_name(clockid_t clk_id)
111*4882a593Smuzhiyun {
112*4882a593Smuzhiyun const struct clockid_map *cm;
113*4882a593Smuzhiyun
114*4882a593Smuzhiyun for (cm = clockids; cm->name; cm++) {
115*4882a593Smuzhiyun if (cm->clockid == clk_id)
116*4882a593Smuzhiyun return cm->name;
117*4882a593Smuzhiyun }
118*4882a593Smuzhiyun return "(not found)";
119*4882a593Smuzhiyun }
120