[mirror_ubuntu-jammy-kernel.git] / include / linux / trace.h

/* 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);

struct trace_array;

void trace_printk_init_buffers(void);
int trace_array_printk(struct trace_array *tr, unsigned long ip,
		const char *fmt, ...);
void trace_array_put(struct trace_array *tr);
struct trace_array *trace_array_get_by_name(const char *name);
int trace_array_destroy(struct trace_array *tr);
#endif	/* CONFIG_TRACING */

#endif	/* _LINUX_TRACE_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
478409dd CZ	2	#ifndef _LINUX_TRACE_H
	3	#define _LINUX_TRACE_H
	4
	5	#ifdef CONFIG_TRACING
	6	/*
	7	* The trace export - an export of Ftrace output. The trace_export
	8	* can process traces and export them to a registered destination as
	9	* an addition to the current only output of Ftrace - i.e. ring buffer.
	10	*
	11	* If you want traces to be sent to some other place rather than ring
	12	* buffer only, just need to register a new trace_export and implement
	13	* its own .write() function for writing traces to the storage.
	14	*
	15	* next - pointer to the next trace_export
	16	* write - copy traces which have been delt with ->commit() to
	17	* the destination
	18	*/
	19	struct trace_export {
	20	struct trace_export __rcu *next;
a773d419	21	void (write)(struct trace_export , const void *, unsigned int);
478409dd CZ	22	};
	23
	24	int register_ftrace_export(struct trace_export *export);
	25	int unregister_ftrace_export(struct trace_export *export);
	26
2d6425af DI	27	struct trace_array;
	28
	29	void trace_printk_init_buffers(void);
	30	int trace_array_printk(struct trace_array *tr, unsigned long ip,
	31	const char *fmt, ...);
28879787 DI	32	void trace_array_put(struct trace_array *tr);
28879787 DI	33	struct trace_array trace_array_get_by_name(const char name);
2d6425af	34	int trace_array_destroy(struct trace_array *tr);
478409dd CZ	35	#endif /* CONFIG_TRACING */
	36
	37	#endif /* _LINUX_TRACE_H */