1*478409ddSChunyan Zhang #ifndef _LINUX_TRACE_H 2*478409ddSChunyan Zhang #define _LINUX_TRACE_H 3*478409ddSChunyan Zhang 4*478409ddSChunyan Zhang #ifdef CONFIG_TRACING 5*478409ddSChunyan Zhang /* 6*478409ddSChunyan Zhang * The trace export - an export of Ftrace output. The trace_export 7*478409ddSChunyan Zhang * can process traces and export them to a registered destination as 8*478409ddSChunyan Zhang * an addition to the current only output of Ftrace - i.e. ring buffer. 9*478409ddSChunyan Zhang * 10*478409ddSChunyan Zhang * If you want traces to be sent to some other place rather than ring 11*478409ddSChunyan Zhang * buffer only, just need to register a new trace_export and implement 12*478409ddSChunyan Zhang * its own .write() function for writing traces to the storage. 13*478409ddSChunyan Zhang * 14*478409ddSChunyan Zhang * next - pointer to the next trace_export 15*478409ddSChunyan Zhang * write - copy traces which have been delt with ->commit() to 16*478409ddSChunyan Zhang * the destination 17*478409ddSChunyan Zhang */ 18*478409ddSChunyan Zhang struct trace_export { 19*478409ddSChunyan Zhang struct trace_export __rcu *next; 20*478409ddSChunyan Zhang void (*write)(const void *, unsigned int); 21*478409ddSChunyan Zhang }; 22*478409ddSChunyan Zhang 23*478409ddSChunyan Zhang int register_ftrace_export(struct trace_export *export); 24*478409ddSChunyan Zhang int unregister_ftrace_export(struct trace_export *export); 25*478409ddSChunyan Zhang 26*478409ddSChunyan Zhang #endif /* CONFIG_TRACING */ 27*478409ddSChunyan Zhang 28*478409ddSChunyan Zhang #endif /* _LINUX_TRACE_H */ 29