net/batman-adv/log.h

   1 /* Copyright (C) 2007-2016  B.A.T.M.A.N. contributors:
   2  *
   3  * Marek Lindner, Simon Wunderlich
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of version 2 of the GNU General Public
   7  * License as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #ifndef _NET_BATMAN_ADV_LOG_H_
  19 #define _NET_BATMAN_ADV_LOG_H_
  20
  21 #include "main.h"
  22
  23 #include <linux/bitops.h>
  24 #include <linux/compiler.h>
  25 #include <linux/printk.h>
  26
  27 #ifdef CONFIG_BATMAN_ADV_DEBUG
  28
  29 int batadv_debug_log_setup(struct batadv_priv *bat_priv);
  30 void batadv_debug_log_cleanup(struct batadv_priv *bat_priv);
  31
  32 #else
  33
  34 static inline int batadv_debug_log_setup(struct batadv_priv *bat_priv)
  35 {
  36         return 0;
  37 }
  38
  39 static inline void batadv_debug_log_cleanup(struct batadv_priv *bat_priv)
  40 {
  41 }
  42
  43 #endif
  44
  45 /**
  46  * enum batadv_dbg_level - available log levels
  47  * @BATADV_DBG_BATMAN: OGM and TQ computations related messages
  48  * @BATADV_DBG_ROUTES: route added / changed / deleted
  49  * @BATADV_DBG_TT: translation table messages
  50  * @BATADV_DBG_BLA: bridge loop avoidance messages
  51  * @BATADV_DBG_DAT: ARP snooping and DAT related messages
  52  * @BATADV_DBG_NC: network coding related messages
  53  * @BATADV_DBG_MCAST: multicast related messages
  54  * @BATADV_DBG_TP_METER: throughput meter messages
  55  * @BATADV_DBG_ALL: the union of all the above log levels
  56  */
  57 enum batadv_dbg_level {
  58         BATADV_DBG_BATMAN       = BIT(0),
  59         BATADV_DBG_ROUTES       = BIT(1),
  60         BATADV_DBG_TT           = BIT(2),
  61         BATADV_DBG_BLA          = BIT(3),
  62         BATADV_DBG_DAT          = BIT(4),
  63         BATADV_DBG_NC           = BIT(5),
  64         BATADV_DBG_MCAST        = BIT(6),
  65         BATADV_DBG_TP_METER     = BIT(7),
  66         BATADV_DBG_ALL          = 127,
  67 };
  68
  69 #ifdef CONFIG_BATMAN_ADV_DEBUG
  70 int batadv_debug_log(struct batadv_priv *bat_priv, const char *fmt, ...)
  71 __printf(2, 3);
  72
  73 /* possibly ratelimited debug output */
  74 #define _batadv_dbg(type, bat_priv, ratelimited, fmt, arg...)   \
  75         do {                                                    \
  76                 if (atomic_read(&bat_priv->log_level) & type && \
  77                     (!ratelimited || net_ratelimit()))          \
  78                         batadv_debug_log(bat_priv, fmt, ## arg);\
  79         }                                                       \
  80         while (0)
  81 #else /* !CONFIG_BATMAN_ADV_DEBUG */
  82 __printf(4, 5)
  83 static inline void _batadv_dbg(int type __always_unused,
  84                                struct batadv_priv *bat_priv __always_unused,
  85                                int ratelimited __always_unused,
  86                                const char *fmt __always_unused, ...)
  87 {
  88 }
  89 #endif
  90
  91 #define batadv_dbg(type, bat_priv, arg...) \
  92         _batadv_dbg(type, bat_priv, 0, ## arg)
  93 #define batadv_dbg_ratelimited(type, bat_priv, arg...) \
  94         _batadv_dbg(type, bat_priv, 1, ## arg)
  95
  96 #define batadv_info(net_dev, fmt, arg...)                               \
  97         do {                                                            \
  98                 struct net_device *_netdev = (net_dev);                 \
  99                 struct batadv_priv *_batpriv = netdev_priv(_netdev);    \
 100                 batadv_dbg(BATADV_DBG_ALL, _batpriv, fmt, ## arg);      \
 101                 pr_info("%s: " fmt, _netdev->name, ## arg);             \
 102         } while (0)
 103 #define batadv_err(net_dev, fmt, arg...)                                \
 104         do {                                                            \
 105                 struct net_device *_netdev = (net_dev);                 \
 106                 struct batadv_priv *_batpriv = netdev_priv(_netdev);    \
 107                 batadv_dbg(BATADV_DBG_ALL, _batpriv, fmt, ## arg);      \
 108                 pr_err("%s: " fmt, _netdev->name, ## arg);              \
 109         } while (0)
 110
 111 #endif /* _NET_BATMAN_ADV_LOG_H_ */