linux_kernel/net/batman-adv/trace.h

/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (C) 2010-2018  B.A.T.M.A.N. contributors:
 *
 * Sven Eckelmann
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

#if !defined(_NET_BATMAN_ADV_TRACE_H_) || defined(TRACE_HEADER_MULTI_READ)
#define _NET_BATMAN_ADV_TRACE_H_

#include "main.h"

#include <linux/tracepoint.h>

#undef TRACE_SYSTEM
#define TRACE_SYSTEM batadv

/* provide dummy function when tracing is disabled */
#if !defined(CONFIG_BATMAN_ADV_TRACING)

#undef TRACE_EVENT
#define TRACE_EVENT(name, proto, ...) \
	static inline void trace_ ## name(proto) {}

#endif /* CONFIG_BATMAN_ADV_TRACING */

#define BATADV_MAX_MSG_LEN	256

TRACE_EVENT(batadv_dbg,

	    TP_PROTO(struct batadv_priv *bat_priv,
		     struct va_format *vaf),

	    TP_ARGS(bat_priv, vaf),

	    TP_STRUCT__entry(
		    __string(device, bat_priv->soft_iface->name)
		    __string(driver, KBUILD_MODNAME)
		    __dynamic_array(char, msg, BATADV_MAX_MSG_LEN)
	    ),

	    TP_fast_assign(
		    __assign_str(device, bat_priv->soft_iface->name);
		    __assign_str(driver, KBUILD_MODNAME);
		    WARN_ON_ONCE(vsnprintf(__get_dynamic_array(msg),
					   BATADV_MAX_MSG_LEN,
					   vaf->fmt,
					   *vaf->va) >= BATADV_MAX_MSG_LEN);
	    ),

	    TP_printk(
		    "%s %s %s",
		    __get_str(driver),
		    __get_str(device),
		    __get_str(msg)
	    )
);

#endif /* _NET_BATMAN_ADV_TRACE_H_ || TRACE_HEADER_MULTI_READ */

#undef TRACE_INCLUDE_PATH
#define TRACE_INCLUDE_PATH .
#undef TRACE_INCLUDE_FILE
#define TRACE_INCLUDE_FILE trace

/* This part must be outside protection */
#include <trace/define_trace.h>