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authorTom Zanussi <tom.zanussi@linux.intel.com>2016-03-03 12:54:58 -0600
committerSteven Rostedt <rostedt@goodmis.org>2016-04-19 18:56:00 -0400
commitdb1388b4ffa9e31e9ff0abacc3bdb121bec8c688 (patch)
treee901832df388a3bbd77a9febc7f467c3fadb96de /kernel/trace/trace.h
parent52a7f16dedff8f23d03df3ea556dec95b92a5801 (diff)
tracing: Add support for named triggers
Named triggers are sets of triggers that share a common set of trigger data. An example of functionality that could benefit from this type of capability would be a set of inlined probes that would each contribute event counts, for example, to a shared counter data structure. The first named trigger registered with a given name owns the common trigger data that the others subsequently registered with the same name will reference. The functions defined here allow users to add, delete, and find named triggers. It also adds functions to pause and unpause named triggers; since named triggers act upon common data, they should also be paused and unpaused as a group. Link: http://lkml.kernel.org/r/c09ff648360f65b10a3e321eddafe18060b4a04f.1457029949.git.tom.zanussi@linux.intel.com Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com> Tested-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Reviewed-by: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace.h')
-rw-r--r--kernel/trace/trace.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index cab1f4bfe85b..727a3d28bce5 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -1184,7 +1184,11 @@ struct event_trigger_data {
char *filter_str;
void *private_data;
bool paused;
+ bool paused_tmp;
struct list_head list;
+ char *name;
+ struct list_head named_list;
+ struct event_trigger_data *named_data;
};
/* Avoid typos */
@@ -1227,6 +1231,15 @@ extern void unregister_trigger(char *glob, struct event_trigger_ops *ops,
extern int set_trigger_filter(char *filter_str,
struct event_trigger_data *trigger_data,
struct trace_event_file *file);
+extern struct event_trigger_data *find_named_trigger(const char *name);
+extern bool is_named_trigger(struct event_trigger_data *test);
+extern int save_named_trigger(const char *name,
+ struct event_trigger_data *data);
+extern void del_named_trigger(struct event_trigger_data *data);
+extern void pause_named_trigger(struct event_trigger_data *data);
+extern void unpause_named_trigger(struct event_trigger_data *data);
+extern void set_named_trigger_data(struct event_trigger_data *data,
+ struct event_trigger_data *named_data);
extern int register_event_command(struct event_command *cmd);
extern int unregister_event_command(struct event_command *cmd);
extern int register_trigger_hist_enable_disable_cmds(void);