| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _LINUX_TRACE_H |
| #define _LINUX_TRACE_H |
| |
| #ifdef CONFIG_TRACING |
| |
| #define TRACE_EXPORT_FUNCTION BIT(0) |
| #define TRACE_EXPORT_EVENT BIT(1) |
| #define TRACE_EXPORT_MARKER BIT(2) |
| |
| /* |
| * 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 |
| * flags - which ftrace to be exported |
| */ |
| struct trace_export { |
| struct trace_export __rcu *next; |
| void (*write)(struct trace_export *, const void *, unsigned int); |
| int flags; |
| }; |
| |
| 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); |
| __printf(3, 4) |
| int trace_array_printk(struct trace_array *tr, unsigned long ip, |
| const char *fmt, ...); |
| int trace_array_init_printk(struct trace_array *tr); |
| 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 */ |