lkml.org 
[lkml]   [2019]   [Jun]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[for-next][PATCH 07/12] tracing/probe: Add trace_event_call register API for trace_probe
From: Masami Hiramatsu <mhiramat@kernel.org>

Since trace_event_call is a field of trace_probe, these
operations should be done in trace_probe.c. trace_kprobe
and trace_uprobe use new functions to register/unregister
trace_event_call.

Link: http://lkml.kernel.org/r/155931583643.28323.14828411185591538876.stgit@devnote2

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
kernel/trace/trace_kprobe.c | 20 +++-----------------
kernel/trace/trace_probe.c | 16 ++++++++++++++++
kernel/trace/trace_probe.h | 6 ++++++
kernel/trace/trace_uprobe.c | 22 +++-------------------
4 files changed, 28 insertions(+), 36 deletions(-)

diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index c43c2d419ded..7f802ee27266 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -1393,28 +1393,14 @@ static inline void init_trace_event_call(struct trace_kprobe *tk,

static int register_kprobe_event(struct trace_kprobe *tk)
{
- struct trace_event_call *call = &tk->tp.call;
- int ret = 0;
-
- init_trace_event_call(tk, call);
-
- ret = register_trace_event(&call->event);
- if (!ret)
- return -ENODEV;
+ init_trace_event_call(tk, &tk->tp.call);

- ret = trace_add_event_call(call);
- if (ret) {
- pr_info("Failed to register kprobe event: %s\n",
- trace_event_name(call));
- unregister_trace_event(&call->event);
- }
- return ret;
+ return trace_probe_register_event_call(&tk->tp);
}

static int unregister_kprobe_event(struct trace_kprobe *tk)
{
- /* tp->event is unregistered in trace_remove_event_call() */
- return trace_remove_event_call(&tk->tp.call);
+ return trace_probe_unregister_event_call(&tk->tp);
}

#ifdef CONFIG_PERF_EVENTS
diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c
index fe4ee2e73d92..509a26024b4f 100644
--- a/kernel/trace/trace_probe.c
+++ b/kernel/trace/trace_probe.c
@@ -920,3 +920,19 @@ int trace_probe_init(struct trace_probe *tp, const char *event,

return 0;
}
+
+int trace_probe_register_event_call(struct trace_probe *tp)
+{
+ struct trace_event_call *call = &tp->call;
+ int ret;
+
+ ret = register_trace_event(&call->event);
+ if (!ret)
+ return -ENODEV;
+
+ ret = trace_add_event_call(call);
+ if (ret)
+ unregister_trace_event(&call->event);
+
+ return ret;
+}
diff --git a/kernel/trace/trace_probe.h b/kernel/trace/trace_probe.h
index 818b1d7693ba..01d7b222e004 100644
--- a/kernel/trace/trace_probe.h
+++ b/kernel/trace/trace_probe.h
@@ -251,6 +251,12 @@ static inline bool trace_probe_is_registered(struct trace_probe *tp)
int trace_probe_init(struct trace_probe *tp, const char *event,
const char *group);
void trace_probe_cleanup(struct trace_probe *tp);
+int trace_probe_register_event_call(struct trace_probe *tp);
+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);
+}

/* Check the name is good for event/group/fields */
static inline bool is_good_name(const char *name)
diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c
index b18b7eb1a76f..c262494fa793 100644
--- a/kernel/trace/trace_uprobe.c
+++ b/kernel/trace/trace_uprobe.c
@@ -1345,30 +1345,14 @@ static inline void init_trace_event_call(struct trace_uprobe *tu,

static int register_uprobe_event(struct trace_uprobe *tu)
{
- struct trace_event_call *call = &tu->tp.call;
- int ret = 0;
-
- init_trace_event_call(tu, call);
-
- ret = register_trace_event(&call->event);
- if (!ret)
- return -ENODEV;
-
- ret = trace_add_event_call(call);
-
- if (ret) {
- pr_info("Failed to register uprobe event: %s\n",
- trace_event_name(call));
- unregister_trace_event(&call->event);
- }
+ init_trace_event_call(tu, &tu->tp.call);

- return ret;
+ return trace_probe_register_event_call(&tu->tp);
}

static int unregister_uprobe_event(struct trace_uprobe *tu)
{
- /* tu->event is unregistered in trace_remove_event_call() */
- return trace_remove_event_call(&tu->tp.call);
+ return trace_probe_unregister_event_call(&tu->tp);
}

#ifdef CONFIG_PERF_EVENTS
--
2.20.1

\
 
 \ /
  Last update: 2019-06-25 21:17    [W:0.056 / U:0.220 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site