linux/include/net/net_debug.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_NET_DEBUG_H
#define _LINUX_NET_DEBUG_H

#include <linux/bug.h>
#include <linux/kern_levels.h>

struct net_device;

__printf(3, 4) __cold
void netdev_printk(const char *level, const struct net_device *dev,
		   const char *format, ...);
__printf(2, 3) __cold
void netdev_emerg(const struct net_device *dev, const char *format, ...);
__printf(2, 3) __cold
void netdev_alert(const struct net_device *dev, const char *format, ...);
__printf(2, 3) __cold
void netdev_crit(const struct net_device *dev, const char *format, ...);
__printf(2, 3) __cold
void netdev_err(const struct net_device *dev, const char *format, ...);
__printf(2, 3) __cold
void netdev_warn(const struct net_device *dev, const char *format, ...);
__printf(2, 3) __cold
void netdev_notice(const struct net_device *dev, const char *format, ...);
__printf(2, 3) __cold
void netdev_info(const struct net_device *dev, const char *format, ...);

#define netdev_level_once(level, dev, fmt, ...)			\
do {								\
	static bool __section(".data.once") __print_once;	\
								\
	if (!__print_once) {					\
		__print_once = true;				\
		netdev_printk(level, dev, fmt, ##__VA_ARGS__);	\
	}							\
} while (0)

#define netdev_emerg_once(dev, fmt, ...) \
	netdev_level_once(KERN_EMERG, dev, fmt, ##__VA_ARGS__)
#define netdev_alert_once(dev, fmt, ...) \
	netdev_level_once(KERN_ALERT, dev, fmt, ##__VA_ARGS__)
#define netdev_crit_once(dev, fmt, ...) \
	netdev_level_once(KERN_CRIT, dev, fmt, ##__VA_ARGS__)
#define netdev_err_once(dev, fmt, ...) \
	netdev_level_once(KERN_ERR, dev, fmt, ##__VA_ARGS__)
#define netdev_warn_once(dev, fmt, ...) \
	netdev_level_once(KERN_WARNING, dev, fmt, ##__VA_ARGS__)
#define netdev_notice_once(dev, fmt, ...) \
	netdev_level_once(KERN_NOTICE, dev, fmt, ##__VA_ARGS__)
#define netdev_info_once(dev, fmt, ...) \
	netdev_level_once(KERN_INFO, dev, fmt, ##__VA_ARGS__)

#if defined(CONFIG_DYNAMIC_DEBUG) || \
	(defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
#define netdev_dbg(__dev, format, args...)			\
do {								\
	dynamic_netdev_dbg(__dev, format, ##args);		\
} while (0)
#elif defined(DEBUG)
#define netdev_dbg(__dev, format, args...)			\
	netdev_printk(KERN_DEBUG, __dev, format, ##args)
#else
#define netdev_dbg(__dev, format, args...)			\
({								\
	if (0)							\
		netdev_printk(KERN_DEBUG, __dev, format, ##args); \
})
#endif

#if defined(VERBOSE_DEBUG)
#define netdev_vdbg	netdev_dbg
#else

#define netdev_vdbg(dev, format, args...)			\
({								\
	if (0)							\
		netdev_printk(KERN_DEBUG, dev, format, ##args);	\
	0;							\
})
#endif

/* netif printk helpers, similar to netdev_printk */

#define netif_printk(priv, type, level, dev, fmt, args...)	\
do {					  			\
	if (netif_msg_##type(priv))				\
		netdev_printk(level, (dev), fmt, ##args);	\
} while (0)

#define netif_level(level, priv, type, dev, fmt, args...)	\
do {								\
	if (netif_msg_##type(priv))				\
		netdev_##level(dev, fmt, ##args);		\
} while (0)

#define netif_emerg(priv, type, dev, fmt, args...)		\
	netif_level(emerg, priv, type, dev, fmt, ##args)
#define netif_alert(priv, type, dev, fmt, args...)		\
	netif_level(alert, priv, type, dev, fmt, ##args)
#define netif_crit(priv, type, dev, fmt, args...)		\
	netif_level(crit, priv, type, dev, fmt, ##args)
#define netif_err(priv, type, dev, fmt, args...)		\
	netif_level(err, priv, type, dev, fmt, ##args)
#define netif_warn(priv, type, dev, fmt, args...)		\
	netif_level(warn, priv, type, dev, fmt, ##args)
#define netif_notice(priv, type, dev, fmt, args...)		\
	netif_level(notice, priv, type, dev, fmt, ##args)
#define netif_info(priv, type, dev, fmt, args...)		\
	netif_level(info, priv, type, dev, fmt, ##args)

#if defined(CONFIG_DYNAMIC_DEBUG) || \
	(defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
#define netif_dbg(priv, type, netdev, format, args...)		\
do {								\
	if (netif_msg_##type(priv))				\
		dynamic_netdev_dbg(netdev, format, ##args);	\
} while (0)
#elif defined(DEBUG)
#define netif_dbg(priv, type, dev, format, args...)		\
	netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
#else
#define netif_dbg(priv, type, dev, format, args...)			\
({									\
	if (0)								\
		netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
	0;								\
})
#endif

/* if @cond then downgrade to debug, else print at @level */
#define netif_cond_dbg(priv, type, netdev, cond, level, fmt, args...)     \
	do {                                                              \
		if (cond)                                                 \
			netif_dbg(priv, type, netdev, fmt, ##args);       \
		else                                                      \
			netif_ ## level(priv, type, netdev, fmt, ##args); \
	} while (0)

#if defined(VERBOSE_DEBUG)
#define netif_vdbg	netif_dbg
#else
#define netif_vdbg(priv, type, dev, format, args...)		\
({								\
	if (0)							\
		netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
	0;							\
})
#endif


#if defined(CONFIG_DEBUG_NET)
#define DEBUG_NET_WARN_ON_ONCE(cond) (void)WARN_ON_ONCE(cond)
#else
#define DEBUG_NET_WARN_ON_ONCE(cond) BUILD_BUG_ON_INVALID(cond)
#endif

#endif	/* _LINUX_NET_DEBUG_H */