linux/kernel/trace/trace_events_inject.c

// SPDX-License-Identifier: GPL-2.0
/*
 * trace_events_inject - trace event injection
 *
 * Copyright (C) 2019 Cong Wang <[email protected]>
 */

#include <linux/module.h>
#include <linux/ctype.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/rculist.h>

#include "trace.h"

static int
trace_inject_entry(struct trace_event_file *file, void *rec, int len)
{ … }

static int
parse_field(char *str, struct trace_event_call *call,
	    struct ftrace_event_field **pf, u64 *pv)
{ … }

static int trace_get_entry_size(struct trace_event_call *call)
{ … }

static void *trace_alloc_entry(struct trace_event_call *call, int *size)
{ … }

#define INJECT_STRING …

/* Caller is responsible to free the *pentry. */
static int parse_entry(char *str, struct trace_event_call *call, void **pentry)
{ … }

static ssize_t
event_inject_write(struct file *filp, const char __user *ubuf, size_t cnt,
		   loff_t *ppos)
{ … }

static ssize_t
event_inject_read(struct file *file, char __user *buf, size_t size,
		  loff_t *ppos)
{ … }

const struct file_operations event_inject_fops = …;