LXR linux/net/batman-adv/log.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/* Copyright (C) 2007-2018  B.A.T.M.A.N. contributors:
   3 *
   4 * Marek Lindner, Simon Wunderlich
   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#ifndef _NET_BATMAN_ADV_LOG_H_
  20#define _NET_BATMAN_ADV_LOG_H_
  21
  22#include "main.h"
  23
  24#include <linux/bitops.h>
  25#include <linux/compiler.h>
  26#include <linux/printk.h>
  27
  28#ifdef CONFIG_BATMAN_ADV_DEBUG
  29
  30int batadv_debug_log_setup(struct batadv_priv *bat_priv);
  31void batadv_debug_log_cleanup(struct batadv_priv *bat_priv);
  32
  33#else
  34
  35static inline int batadv_debug_log_setup(struct batadv_priv *bat_priv)
  36{
  37        return 0;
  38}
  39
  40static inline void batadv_debug_log_cleanup(struct batadv_priv *bat_priv)
  41{
  42}
  43
  44#endif
  45
  46/**
  47 * enum batadv_dbg_level - available log levels
  48 */
  49enum batadv_dbg_level {
  50        /** @BATADV_DBG_BATMAN: OGM and TQ computations related messages */
  51        BATADV_DBG_BATMAN       = BIT(0),
  52
  53        /** @BATADV_DBG_ROUTES: route added / changed / deleted */
  54        BATADV_DBG_ROUTES       = BIT(1),
  55
  56        /** @BATADV_DBG_TT: translation table messages */
  57        BATADV_DBG_TT           = BIT(2),
  58
  59        /** @BATADV_DBG_BLA: bridge loop avoidance messages */
  60        BATADV_DBG_BLA          = BIT(3),
  61
  62        /** @BATADV_DBG_DAT: ARP snooping and DAT related messages */
  63        BATADV_DBG_DAT          = BIT(4),
  64
  65        /** @BATADV_DBG_NC: network coding related messages */
  66        BATADV_DBG_NC           = BIT(5),
  67
  68        /** @BATADV_DBG_MCAST: multicast related messages */
  69        BATADV_DBG_MCAST        = BIT(6),
  70
  71        /** @BATADV_DBG_TP_METER: throughput meter messages */
  72        BATADV_DBG_TP_METER     = BIT(7),
  73
  74        /** @BATADV_DBG_ALL: the union of all the above log levels */
  75        BATADV_DBG_ALL          = 255,
  76};
  77
  78#ifdef CONFIG_BATMAN_ADV_DEBUG
  79int batadv_debug_log(struct batadv_priv *bat_priv, const char *fmt, ...)
  80__printf(2, 3);
  81
  82/**
  83 * _batadv_dbg() - Store debug output with(out) ratelimiting
  84 * @type: type of debug message
  85 * @bat_priv: the bat priv with all the soft interface information
  86 * @ratelimited: whether output should be rate limited
  87 * @fmt: format string
  88 * @arg...: variable arguments
  89 */
  90#define _batadv_dbg(type, bat_priv, ratelimited, fmt, arg...)           \
  91        do {                                                            \
  92                struct batadv_priv *__batpriv = (bat_priv);             \
  93                if (atomic_read(&__batpriv->log_level) & (type) &&      \
  94                    (!(ratelimited) || net_ratelimit()))                \
  95                        batadv_debug_log(__batpriv, fmt, ## arg);       \
  96        }                                                               \
  97        while (0)
  98#else /* !CONFIG_BATMAN_ADV_DEBUG */
  99__printf(4, 5)
 100static inline void _batadv_dbg(int type __always_unused,
 101                               struct batadv_priv *bat_priv __always_unused,
 102                               int ratelimited __always_unused,
 103                               const char *fmt __always_unused, ...)
 104{
 105}
 106#endif
 107
 108/**
 109 * batadv_dbg() - Store debug output without ratelimiting
 110 * @type: type of debug message
 111 * @bat_priv: the bat priv with all the soft interface information
 112 * @arg...: format string and variable arguments
 113 */
 114#define batadv_dbg(type, bat_priv, arg...) \
 115        _batadv_dbg(type, bat_priv, 0, ## arg)
 116
 117/**
 118 * batadv_dbg_ratelimited() - Store debug output with ratelimiting
 119 * @type: type of debug message
 120 * @bat_priv: the bat priv with all the soft interface information
 121 * @arg...: format string and variable arguments
 122 */
 123#define batadv_dbg_ratelimited(type, bat_priv, arg...) \
 124        _batadv_dbg(type, bat_priv, 1, ## arg)
 125
 126/**
 127 * batadv_info() - Store message in debug buffer and print it to kmsg buffer
 128 * @net_dev: the soft interface net device
 129 * @fmt: format string
 130 * @arg...: variable arguments
 131 */
 132#define batadv_info(net_dev, fmt, arg...)                               \
 133        do {                                                            \
 134                struct net_device *_netdev = (net_dev);                 \
 135                struct batadv_priv *_batpriv = netdev_priv(_netdev);    \
 136                batadv_dbg(BATADV_DBG_ALL, _batpriv, fmt, ## arg);      \
 137                pr_info("%s: " fmt, _netdev->name, ## arg);             \
 138        } while (0)
 139
 140/**
 141 * batadv_err() - Store error in debug buffer and print it to kmsg buffer
 142 * @net_dev: the soft interface net device
 143 * @fmt: format string
 144 * @arg...: variable arguments
 145 */
 146#define batadv_err(net_dev, fmt, arg...)                                \
 147        do {                                                            \
 148                struct net_device *_netdev = (net_dev);                 \
 149                struct batadv_priv *_batpriv = netdev_priv(_netdev);    \
 150                batadv_dbg(BATADV_DBG_ALL, _batpriv, fmt, ## arg);      \
 151                pr_err("%s: " fmt, _netdev->name, ## arg);              \
 152        } while (0)
 153
 154#endif /* _NET_BATMAN_ADV_LOG_H_ */
 155