// 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)";}