| Chunyan Zhang | 478409d | 2016-11-21 15:57:18 +0800 | [diff] [blame] | 1 | #ifndef _LINUX_TRACE_H |
| 2 | #define _LINUX_TRACE_H |
| 3 | |
| 4 | #ifdef CONFIG_TRACING |
| 5 | /* |
| 6 | * The trace export - an export of Ftrace output. The trace_export |
| 7 | * can process traces and export them to a registered destination as |
| 8 | * an addition to the current only output of Ftrace - i.e. ring buffer. |
| 9 | * |
| 10 | * If you want traces to be sent to some other place rather than ring |
| 11 | * buffer only, just need to register a new trace_export and implement |
| 12 | * its own .write() function for writing traces to the storage. |
| 13 | * |
| 14 | * next - pointer to the next trace_export |
| 15 | * write - copy traces which have been delt with ->commit() to |
| 16 | * the destination |
| 17 | */ |
| 18 | struct trace_export { |
| 19 | struct trace_export __rcu *next; |
| 20 | void (*write)(const void *, unsigned int); |
| 21 | }; |
| 22 | |
| 23 | int register_ftrace_export(struct trace_export *export); |
| 24 | int unregister_ftrace_export(struct trace_export *export); |
| 25 | |
| 26 | #endif /* CONFIG_TRACING */ |
| 27 | |
| 28 | #endif /* _LINUX_TRACE_H */ |