net/batman-adv/trace.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* Copyright (C) 2010-2018  B.A.T.M.A.N. contributors:
   3  *
   4  * Sven Eckelmann
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of version 2 of the GNU General Public
   8  * License as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #if !defined(_NET_BATMAN_ADV_TRACE_H_) || defined(TRACE_HEADER_MULTI_READ)
  20 #define _NET_BATMAN_ADV_TRACE_H_
  21
  22 #include "main.h"
  23
  24 #include <linux/bug.h>
  25 #include <linux/kernel.h>
  26 #include <linux/netdevice.h>
  27 #include <linux/percpu.h>
  28 #include <linux/printk.h>
  29 #include <linux/tracepoint.h>
  30 #include <linux/types.h>
  31
  32 #undef TRACE_SYSTEM
  33 #define TRACE_SYSTEM batadv
  34
  35 /* provide dummy function when tracing is disabled */
  36 #if !defined(CONFIG_BATMAN_ADV_TRACING)
  37
  38 #undef TRACE_EVENT
  39 #define TRACE_EVENT(name, proto, ...) \
  40         static inline void trace_ ## name(proto) {}
  41
  42 #endif /* CONFIG_BATMAN_ADV_TRACING */
  43
  44 #define BATADV_MAX_MSG_LEN      256
  45
  46 TRACE_EVENT(batadv_dbg,
  47
  48             TP_PROTO(struct batadv_priv *bat_priv,
  49                      struct va_format *vaf),
  50
  51             TP_ARGS(bat_priv, vaf),
  52
  53             TP_STRUCT__entry(
  54                     __string(device, bat_priv->soft_iface->name)
  55                     __string(driver, KBUILD_MODNAME)
  56                     __dynamic_array(char, msg, BATADV_MAX_MSG_LEN)
  57             ),
  58
  59             TP_fast_assign(
  60                     __assign_str(device, bat_priv->soft_iface->name);
  61                     __assign_str(driver, KBUILD_MODNAME);
  62                     WARN_ON_ONCE(vsnprintf(__get_dynamic_array(msg),
  63                                            BATADV_MAX_MSG_LEN,
  64                                            vaf->fmt,
  65                                            *vaf->va) >= BATADV_MAX_MSG_LEN);
  66             ),
  67
  68             TP_printk(
  69                     "%s %s %s",
  70                     __get_str(driver),
  71                     __get_str(device),
  72                     __get_str(msg)
  73             )
  74 );
  75
  76 #endif /* _NET_BATMAN_ADV_TRACE_H_ || TRACE_HEADER_MULTI_READ */
  77
  78 #undef TRACE_INCLUDE_PATH
  79 #define TRACE_INCLUDE_PATH .
  80 #undef TRACE_INCLUDE_FILE
  81 #define TRACE_INCLUDE_FILE trace
  82
  83 /* This part must be outside protection */
  84 #include <trace/define_trace.h>