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