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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 */ |