// SPDX-License-Identifier: GPL-2.0
#include <linux/ftrace.h>
#include <linux/tracepoint.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/rv.h>
#include <rv/instrumentation.h>

#define MODULE_NAME "snroc"

#include <trace/events/sched.h>
#include <rv_trace.h>
#include <monitors/sched/sched.h>

#define RV_MON_TYPE RV_MON_PER_TASK
#include "snroc.h"
#include <rv/da_monitor.h>

static void handle_sched_set_state(void *data, struct task_struct *tsk, int state)
{
        da_handle_event(tsk, sched_set_state_snroc);
}

static void handle_sched_switch(void *data, bool preempt,
                                struct task_struct *prev,
                                struct task_struct *next,
                                unsigned int prev_state)
{
        da_handle_start_event(prev, sched_switch_out_snroc);
        da_handle_event(next, sched_switch_in_snroc);
}

static int enable_snroc(void)
{
        int retval;

        retval = da_monitor_init();
        if (retval)
                return retval;

        rv_attach_trace_probe("snroc", sched_set_state_tp, handle_sched_set_state);
        rv_attach_trace_probe("snroc", sched_switch, handle_sched_switch);

        return 0;
}

static void disable_snroc(void)
{
        rv_this.enabled = 0;

        rv_detach_trace_probe("snroc", sched_set_state_tp, handle_sched_set_state);
        rv_detach_trace_probe("snroc", sched_switch, handle_sched_switch);

        da_monitor_destroy();
}

static struct rv_monitor rv_this = {
        .name = "snroc",
        .description = "set non runnable on its own context.",
        .enable = enable_snroc,
        .disable = disable_snroc,
        .reset = da_monitor_reset_all,
        .enabled = 0,
};

static int __init register_snroc(void)
{
        return rv_register_monitor(&rv_this, &rv_sched);
}

static void __exit unregister_snroc(void)
{
        rv_unregister_monitor(&rv_this);
}

module_init(register_snroc);
module_exit(unregister_snroc);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Gabriele Monaco <gmonaco@redhat.com>");
MODULE_DESCRIPTION("snroc: set non runnable on its own context.");