diff options
| author | Steven Rostedt <srostedt@redhat.com> | 2009-04-10 14:53:50 -0400 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2009-04-14 12:58:03 -0400 |
| commit | 6d723736e472f7a0cd5b62c84152fceead241328 (patch) | |
| tree | 8df2f6c47ebdfdeb8979758c877a5abbd9c06aef /include | |
| parent | 17c873ec280a03894bc718af817f7f24fa787ae1 (diff) | |
tracing/events: add support for modules to TRACE_EVENT
Impact: allow modules to add TRACE_EVENTS on load
This patch adds the final hooks to allow modules to use the TRACE_EVENT
macro. A notifier and a data structure are used to link the TRACE_EVENTs
defined in the module to connect them with the ftrace event tracing system.
It also adds the necessary automated clean ups to the trace events when a
module is removed.
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/ftrace_event.h | 3 | ||||
| -rw-r--r-- | include/linux/module.h | 4 | ||||
| -rw-r--r-- | include/linux/trace_seq.h | 2 | ||||
| -rw-r--r-- | include/trace/ftrace.h | 1 |
4 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h index 17810853b4f..75f3ac01a87 100644 --- a/include/linux/ftrace_event.h +++ b/include/linux/ftrace_event.h @@ -7,6 +7,7 @@ struct trace_array; struct tracer; +struct dentry; /* * The trace entry - the most basic unit of tracing. This is what @@ -87,6 +88,7 @@ struct ftrace_event_call { char *name; char *system; struct dentry *dir; + struct trace_event *event; int enabled; int (*regfunc)(void); void (*unregfunc)(void); @@ -97,6 +99,7 @@ struct ftrace_event_call { struct list_head fields; int n_preds; struct filter_pred **preds; + void *mod; #ifdef CONFIG_EVENT_PROFILE atomic_t profile_count; diff --git a/include/linux/module.h b/include/linux/module.h index 627ac082e2a..6155fa44168 100644 --- a/include/linux/module.h +++ b/include/linux/module.h @@ -337,6 +337,10 @@ struct module const char **trace_bprintk_fmt_start; unsigned int num_trace_bprintk_fmt; #endif +#ifdef CONFIG_EVENT_TRACING + struct ftrace_event_call *trace_events; + unsigned int num_trace_events; +#endif #ifdef CONFIG_MODULE_UNLOAD /* What modules depend on me? */ diff --git a/include/linux/trace_seq.h b/include/linux/trace_seq.h index 28051da876d..15ca2c71af1 100644 --- a/include/linux/trace_seq.h +++ b/include/linux/trace_seq.h @@ -1,6 +1,8 @@ #ifndef _LINUX_TRACE_SEQ_H #define _LINUX_TRACE_SEQ_H +#include <linux/fs.h> + /* * Trace sequences are used to allow a function to call several other functions * to create a string of data to use (up to a max of PAGE_SIZE. diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h index 955b967acd7..60c5323bee6 100644 --- a/include/trace/ftrace.h +++ b/include/trace/ftrace.h @@ -477,6 +477,7 @@ __attribute__((__aligned__(4))) \ __attribute__((section("_ftrace_events"))) event_##call = { \ .name = #call, \ .system = __stringify(TRACE_SYSTEM), \ + .event = &ftrace_event_type_##call, \ .raw_init = ftrace_raw_init_event_##call, \ .regfunc = ftrace_raw_reg_event_##call, \ .unregfunc = ftrace_raw_unreg_event_##call, \ |