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- // 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)";
- }
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