[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20230906184650.074dfdcf@gandalf.local.home>
Date: Wed, 6 Sep 2023 18:46:50 -0400
From: Steven Rostedt <rostedt@...dmis.org>
To: Naresh Kamboju <naresh.kamboju@...aro.org>
Cc: zhengyejian1@...wei.com, akaher@...are.com,
linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
linux-trace-kernel@...r.kernel.org, mhiramat@...nel.org,
shuah@...nel.org, skhan@...uxfoundation.org, yeweihua4@...wei.com
Subject: Re: "[PATCH] selftests/ftrace: Correctly enable event in
instance-event.tc"
On Wed, 6 Sep 2023 14:50:00 -0400
Steven Rostedt <rostedt@...dmis.org> wrote:
> BTW, when you ran these, did you apply:
>
> https://patchwork.kernel.org/project/linux-trace-kernel/patch/20230905183332.628d7cc0@gandalf.local.home/
Can you both try the above patch and this patch?
-- Steve
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 35783a7baf15..0827037ee3b8 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -4973,6 +4973,33 @@ int tracing_open_generic_tr(struct inode *inode, struct file *filp)
return 0;
}
+/*
+ * The private pointer of the inode is the trace_event_file.
+ * Update the tr ref count associated to it.
+ */
+int tracing_open_file_tr(struct inode *inode, struct file *filp)
+{
+ struct trace_event_file *file = inode->i_private;
+ int ret;
+
+ ret = tracing_check_open_get_tr(file->tr);
+ if (ret)
+ return ret;
+
+ filp->private_data = inode->i_private;
+
+ return 0;
+}
+
+int tracing_release_file_tr(struct inode *inode, struct file *filp)
+{
+ struct trace_event_file *file = inode->i_private;
+
+ trace_array_put(file->tr);
+
+ return 0;
+}
+
static int tracing_mark_open(struct inode *inode, struct file *filp)
{
stream_open(inode, filp);
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 5669dd1f90d9..77debe53f07c 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -610,6 +610,8 @@ void tracing_reset_all_online_cpus(void);
void tracing_reset_all_online_cpus_unlocked(void);
int tracing_open_generic(struct inode *inode, struct file *filp);
int tracing_open_generic_tr(struct inode *inode, struct file *filp);
+int tracing_open_file_tr(struct inode *inode, struct file *filp);
+int tracing_release_file_tr(struct inode *inode, struct file *filp);
bool tracing_is_disabled(void);
bool tracer_tracing_is_on(struct trace_array *tr);
void tracer_tracing_on(struct trace_array *tr);
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index ed367d713be0..2af92177b765 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -2103,9 +2103,10 @@ static const struct file_operations ftrace_set_event_notrace_pid_fops = {
};
static const struct file_operations ftrace_enable_fops = {
- .open = tracing_open_generic,
+ .open = tracing_open_file_tr,
.read = event_enable_read,
.write = event_enable_write,
+ .release = tracing_release_file_tr,
.llseek = default_llseek,
};
@@ -2122,9 +2123,10 @@ static const struct file_operations ftrace_event_id_fops = {
};
static const struct file_operations ftrace_event_filter_fops = {
- .open = tracing_open_generic,
+ .open = tracing_open_file_tr,
.read = event_filter_read,
.write = event_filter_write,
+ .release = tracing_release_file_tr,
.llseek = default_llseek,
};
--
2.40.1
Powered by blists - more mailing lists