summaryrefslogblamecommitdiff
path: root/include/linux/trace.h
blob: b95ffb2188abaaac85dc992c6545d33b946495d1 (plain) (tree) 
b24413180f56 ^

478409dd683d ^



















a773d419275b ^

478409dd683d ^








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

                                      


















                                                                       
                                                                         







                                                          
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_TRACE_H
#define _LINUX_TRACE_H

#ifdef CONFIG_TRACING
/*
 * The trace export - an export of Ftrace output. The trace_export
 * can process traces and export them to a registered destination as
 * an addition to the current only output of Ftrace - i.e. ring buffer.
 *
 * If you want traces to be sent to some other place rather than ring
 * buffer only, just need to register a new trace_export and implement
 * its own .write() function for writing traces to the storage.
 *
 * next		- pointer to the next trace_export
 * write	- copy traces which have been delt with ->commit() to
 *		  the destination
 */
struct trace_export {
	struct trace_export __rcu	*next;
	void (*write)(struct trace_export *, const void *, unsigned int);
};

int register_ftrace_export(struct trace_export *export);
int unregister_ftrace_export(struct trace_export *export);

#endif	/* CONFIG_TRACING */

#endif	/* _LINUX_TRACE_H */