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tracing/probe: Split trace_event related data from trace_probe

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Split the trace_event related data from trace_probe data structure
and introduce trace_probe_event data structure for its folder.
This trace_probe_event data structure can have multiple trace_probe.

Link: http://lkml.kernel.org/r/156095683995.28024.7552150340561557873.stgit@devnote2

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Masami Hiramatsu
2019-06-20 00:07:20 +09:00
committed by Steven Rostedt (VMware)
parent 17e262e995
commit 60d53e2c3b
4 changed files with 311 additions and 113 deletions
Download Patch File Download Diff File Expand all files Collapse all files
kernel/trace/trace_probe.h
+37 -11
View File
@@ -222,11 +222,18 @@ struct probe_arg {
const struct fetch_type *type; /* Type of this argument */
};
struct trace_probe {
/* Event call and class holder */
struct trace_probe_event {
unsigned int flags; /* For TP_FLAG_* */
struct trace_event_class class;
struct trace_event_call call;
struct list_head files;
struct list_head probes;
};
struct trace_probe {
struct list_head list;
struct trace_probe_event *event;
ssize_t size; /* trace entry size */
unsigned int nr_args;
struct probe_arg args[];
@@ -240,19 +247,19 @@ struct event_file_link {
static inline bool trace_probe_test_flag(struct trace_probe *tp,
unsigned int flag)
{
return !!(tp->flags & flag);
return !!(tp->event->flags & flag);
}
static inline void trace_probe_set_flag(struct trace_probe *tp,
unsigned int flag)
{
tp->flags |= flag;
tp->event->flags |= flag;
}
static inline void trace_probe_clear_flag(struct trace_probe *tp,
unsigned int flag)
{
tp->flags &= ~flag;
tp->event->flags &= ~flag;
}
static inline bool trace_probe_is_enabled(struct trace_probe *tp)
@@ -262,29 +269,48 @@ static inline bool trace_probe_is_enabled(struct trace_probe *tp)
static inline const char *trace_probe_name(struct trace_probe *tp)
{
return trace_event_name(&tp->call);
return trace_event_name(&tp->event->call);
}
static inline const char *trace_probe_group_name(struct trace_probe *tp)
{
return tp->call.class->system;
return tp->event->call.class->system;
}
static inline struct trace_event_call *
trace_probe_event_call(struct trace_probe *tp)
{
return &tp->call;
return &tp->event->call;
}
static inline struct trace_probe_event *
trace_probe_event_from_call(struct trace_event_call *event_call)
{
return container_of(event_call, struct trace_probe_event, call);
}
static inline struct trace_probe *
trace_probe_primary_from_call(struct trace_event_call *call)
{
struct trace_probe_event *tpe = trace_probe_event_from_call(call);
return list_first_entry(&tpe->probes, struct trace_probe, list);
}
static inline struct list_head *trace_probe_probe_list(struct trace_probe *tp)
{
return &tp->event->probes;
}
static inline int trace_probe_unregister_event_call(struct trace_probe *tp)
{
/* tp->event is unregistered in trace_remove_event_call() */
return trace_remove_event_call(&tp->call);
return trace_remove_event_call(&tp->event->call);
}
static inline bool trace_probe_has_single_file(struct trace_probe *tp)
{
return !!list_is_singular(&tp->files);
return !!list_is_singular(&tp->event->files);
}
int trace_probe_init(struct trace_probe *tp, const char *event,
@@ -298,9 +324,9 @@ struct event_file_link *trace_probe_get_file_link(struct trace_probe *tp,
struct trace_event_file *file);
#define trace_probe_for_each_link(pos, tp) \
list_for_each_entry(pos, &(tp)->files, list)
list_for_each_entry(pos, &(tp)->event->files, list)
#define trace_probe_for_each_link_rcu(pos, tp) \
list_for_each_entry_rcu(pos, &(tp)->files, list)
list_for_each_entry_rcu(pos, &(tp)->event->files, list)
/* Check the name is good for event/group/fields */
static inline bool is_good_name(const char *name)