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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2022 Google Inc, Steven Rostedt <rostedt@goodmis.org>
*/
#include "ktrace.h"
static void enable_usage(struct ccli *ccli)
{
ccli_printf(ccli, "usage: enable <type> <type-command>\n"
" <type> : tracing, event\n");
}
static void disable_usage(struct ccli *ccli)
{
ccli_printf(ccli, "usage: disable <type> <type-command>\n"
" <type> : tracing, event\n");
}
static int enable_tracing(struct ccli *ccli, void *data,
int argc, char **argv)
{
ccli_printf(ccli, "# echo 1 > %s/tracing_on\n", tracefs_tracing_dir());
return 0;
}
static int disable_tracing(struct ccli *ccli, void *data,
int argc, char **argv)
{
ccli_printf(ccli, "# echo 0 > %s/tracing_on\n", tracefs_tracing_dir());
return 0;
}
static char *get_event(struct ccli *ccli, void *data, char *ename)
{
struct tep_handle *tep = data;
struct tep_event *event;
char *file;
char *sav;
int ret;
if (strcmp(ename, "all") == 0)
return tracefs_instance_get_file(NULL, "events/enable");
sav = strchr(ename, '/');
/* Get the systme if no '/' or nothing after it */
if (!sav || !sav[1]) {
if (sav)
*sav = '\0';
ret = asprintf(&sav, "events/%s/enable", ename);
if (ret < 0)
return NULL;
printf("sav='%s'\n", sav);
if (!tracefs_file_exists(NULL, sav)) {
free(sav);
ccli_printf(ccli, "# System '%s' not found\n", ename);
return NULL;
}
file = tracefs_instance_get_file(NULL, sav);
free(sav);
return file;
}
sav = strdup(ename);
/* Failure above will just print "(nul)" below */
event = find_event(tep, ename);
if (!event) {
ccli_printf(ccli, "# Event '%s' not found\n", sav);
return 0;
}
free(sav);
return tracefs_event_get_file(NULL, event->system, event->name, "enable");
}
static int enable_event(struct ccli *ccli, void *data,
int argc, char **argv)
{
char *file;
if (argc < 1) {
ccli_printf(ccli, "usage: enable event system/event\n");
return 0;
}
file = get_event(ccli, data, argv[0]);
if (file)
ccli_printf(ccli, "# echo 1 > %s\n", file);
tracefs_put_tracing_file(file);
return 0;
}
static int disable_event(struct ccli *ccli, void *data,
int argc, char **argv)
{
char *file;
if (argc < 1) {
ccli_printf(ccli, "usage: enable event system/event\n");
return 0;
}
file = get_event(ccli, data, argv[0]);
if (file)
ccli_printf(ccli, "# echo 0 > %s\n", file);
tracefs_put_tracing_file(file);
return 0;
}
int cmd_enable(struct ccli *ccli, const char *command, const char *line,
void *data, int argc, char **argv)
{
if (argc < 2) {
enable_usage(ccli);
return 0;
}
if (strcmp(argv[1], "tracing") == 0)
return enable_tracing(ccli, data, argc - 2, argv + 2);
if (strcmp(argv[1], "event") == 0)
return enable_event(ccli, data, argc - 2, argv + 2);
enable_usage(ccli);
return 0;
}
int cmd_disable(struct ccli *ccli, const char *command, const char *line,
void *data, int argc, char **argv)
{
if (argc < 2) {
disable_usage(ccli);
return 0;
}
if (strcmp(argv[1], "tracing") == 0)
return disable_tracing(ccli, data, argc - 2, argv + 2);
if (strcmp(argv[1], "event") == 0)
return disable_event(ccli, data, argc - 2, argv + 2);
enable_usage(ccli);
return 0;
}
static int disenable_event_completion(struct ccli *ccli, void *data,
int argc, char **argv,
char ***list, int word, char *match)
{
struct tep_handle *tep = data;
int cnt = 0;
int ret = 0;
if (word == 0) {
ret = ccli_list_add(ccli, list, &cnt, "all");
/* Do not add '/' for 'all' */
if (ret == 1 && strcmp(match, "all") == 0)
return 1;
ret = event_completion(ccli, tep, list, &cnt, match, 0);
}
if (ret < 0)
ccli_list_free(ccli, list, cnt);
return ret;
}
int enable_completion(struct ccli *ccli, const char *command,
const char *line, int word,
char *match, char ***list, void *data)
{
char *types[] = { "tracing", "event" };
char **argv;
int argc;
int cnt = 0;
int ret = 0;
int i;
if (word == 1) {
for (i = 0; ret >= 0 && i < ARRAY_SIZE(types); i++)
ret = ccli_list_add(ccli, list, &cnt, types[i]);
return ret;
}
argc = ccli_line_parse(line, &argv);
if (argc < 0)
return 0;
if (strcmp(argv[1], "event") == 0)
ret = disenable_event_completion(ccli, data, argc - 2, argv + 2,
list, word - 2, match);
ccli_argv_free(argv);
return ret;
}
int disable_completion(struct ccli *ccli, const char *command,
const char *line, int word,
char *match, char ***list, void *data)
{
char *types[] = { "tracing", "event" };
char **argv;
int argc;
int cnt = 0;
int ret = 0;
int i;
if (word == 1) {
for (i = 0; ret >= 0 && i < ARRAY_SIZE(types); i++)
ret = ccli_list_add(ccli, list, &cnt, types[i]);
return ret;
}
argc = ccli_line_parse(line, &argv);
if (argc < 0)
return 0;
if (strcmp(argv[1], "event") == 0)
ret = disenable_event_completion(ccli, data, argc - 2, argv + 2,
list, word - 2, match);
ccli_argv_free(argv);
return ret;
}
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