net/batman-adv/log.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* Copyright (C) 2007-2017  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
  30 int batadv_debug_log_setup(struct batadv_priv *bat_priv);
  31 void batadv_debug_log_cleanup(struct batadv_priv *bat_priv);
  32
  33 #else
  34
  35 static inline int batadv_debug_log_setup(struct batadv_priv *bat_priv)
  36 {
  37         return 0;
  38 }
  39
  40 static 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  */
  49 enum 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
  79 int 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)
 100 static 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_ */