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Commit 4e267db1 authored by Steven Rostedt's avatar Steven Rostedt
Browse files

tracing: Make the pid filtering helper functions global 



Make the functions used for pid filtering global for tracing, such that the
function tracer can use the pid code as well.

Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
parent 0ded5174

kernel/trace/trace.h

+9 −0
Original line number Diff line number Diff line
@@ -628,6 +628,15 @@ extern unsigned long nsecs_to_usecs(unsigned long nsecs); 


extern unsigned long tracing_thresh;



/* PID filtering */

bool trace_find_filtered_pid(struct trace_pid_list *filtered_pids,

			     pid_t search_pid);

bool trace_ignore_this_task(struct trace_pid_list *filtered_pids,

			    struct task_struct *task);

void trace_filter_add_remove_task(struct trace_pid_list *pid_list,

				  struct task_struct *self,

				  struct task_struct *task);



#ifdef CONFIG_TRACER_MAX_TRACE

void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu);

void update_max_tr_single(struct trace_array *tr,

kernel/trace/trace_events.c

+17 −17
Original line number Diff line number Diff line
@@ -503,8 +503,8 @@ static void ftrace_clear_events(struct trace_array *tr) 
extern int pid_max;



/* Returns true if found in filter */

static bool

find_filtered_pid(struct trace_pid_list *filtered_pids, pid_t search_pid)

bool

trace_find_filtered_pid(struct trace_pid_list *filtered_pids, pid_t search_pid)

{

	/*

	 * If pid_max changed after filtered_pids was created, we
@@ -516,8 +516,8 @@ find_filtered_pid(struct trace_pid_list *filtered_pids, pid_t search_pid) 
	return test_bit(search_pid, filtered_pids->pids);

}



static bool

ignore_this_task(struct trace_pid_list *filtered_pids, struct task_struct *task)

bool

trace_ignore_this_task(struct trace_pid_list *filtered_pids, struct task_struct *task)

{

	/*

	 * Return false, because if filtered_pids does not exist,
@@ -526,10 +526,10 @@ ignore_this_task(struct trace_pid_list *filtered_pids, struct task_struct *task) 
	if (!filtered_pids)

		return false;



	return !find_filtered_pid(filtered_pids, task->pid);

	return !trace_find_filtered_pid(filtered_pids, task->pid);

}



static void filter_add_remove_task(struct trace_pid_list *pid_list,

void trace_filter_add_remove_task(struct trace_pid_list *pid_list,

				  struct task_struct *self,

				  struct task_struct *task)

{
@@ -538,7 +538,7 @@ static void filter_add_remove_task(struct trace_pid_list *pid_list, 


	/* For forks, we only add if the forking task is listed */

	if (self) {

		if (!find_filtered_pid(pid_list, self->pid))

		if (!trace_find_filtered_pid(pid_list, self->pid))

			return;

	}
@@ -560,7 +560,7 @@ event_filter_pid_sched_process_exit(void *data, struct task_struct *task) 
	struct trace_array *tr = data;



	pid_list = rcu_dereference_sched(tr->filtered_pids);

	filter_add_remove_task(pid_list, NULL, task);

	trace_filter_add_remove_task(pid_list, NULL, task);

}



static void
@@ -572,7 +572,7 @@ event_filter_pid_sched_process_fork(void *data, 
	struct trace_array *tr = data;



	pid_list = rcu_dereference_sched(tr->filtered_pids);

	filter_add_remove_task(pid_list, self, task);

	trace_filter_add_remove_task(pid_list, self, task);

}



void trace_event_follow_fork(struct trace_array *tr, bool enable)
@@ -600,8 +600,8 @@ event_filter_pid_sched_switch_probe_pre(void *data, bool preempt, 
	pid_list = rcu_dereference_sched(tr->filtered_pids);



	this_cpu_write(tr->trace_buffer.data->ignore_pid,

		       ignore_this_task(pid_list, prev) &&

		       ignore_this_task(pid_list, next));

		       trace_ignore_this_task(pid_list, prev) &&

		       trace_ignore_this_task(pid_list, next));

}



static void
@@ -614,7 +614,7 @@ event_filter_pid_sched_switch_probe_post(void *data, bool preempt, 
	pid_list = rcu_dereference_sched(tr->filtered_pids);



	this_cpu_write(tr->trace_buffer.data->ignore_pid,

		       ignore_this_task(pid_list, next));

		       trace_ignore_this_task(pid_list, next));

}



static void
@@ -630,7 +630,7 @@ event_filter_pid_sched_wakeup_probe_pre(void *data, struct task_struct *task) 
	pid_list = rcu_dereference_sched(tr->filtered_pids);



	this_cpu_write(tr->trace_buffer.data->ignore_pid,

		       ignore_this_task(pid_list, task));

		       trace_ignore_this_task(pid_list, task));

}



static void
@@ -647,7 +647,7 @@ event_filter_pid_sched_wakeup_probe_post(void *data, struct task_struct *task) 


	/* Set tracing if current is enabled */

	this_cpu_write(tr->trace_buffer.data->ignore_pid,

		       ignore_this_task(pid_list, current));

		       trace_ignore_this_task(pid_list, current));

}



static void __ftrace_clear_event_pids(struct trace_array *tr)
@@ -1654,7 +1654,7 @@ static void ignore_task_cpu(void *data) 
					     mutex_is_locked(&event_mutex));



	this_cpu_write(tr->trace_buffer.data->ignore_pid,

		       ignore_this_task(pid_list, current));

		       trace_ignore_this_task(pid_list, current));

}



static ssize_t