[SOLVED] Kernel implementation of net netdev_info()

Issue

From kernel headers netdevice.h below.

I searched the source code for the implementation of netdev_info() from the path of kernel/driver/net and kernel/include, but still nothing found. Where is it defined? Any idea?

// include/linux/netdevice.h
void netdev_info(const struct net_device *dev, const char *format, ...);

Solution

You won't find them so easily because those functions are defined through a macro in net/core/dev.c

#define define_netdev_printk_level(func, level)         \
void func(const struct net_device *dev, const char *fmt, ...)   \
{                               \
    struct va_format vaf;                   \
    va_list args;                       \
                                \
    va_start(args, fmt);                    \
                                \
    vaf.fmt = fmt;                      \
    vaf.va = &args;                     \
                                \
    __netdev_printk(level, dev, &vaf);          \
                                \
    va_end(args);                       \
}                               \
EXPORT_SYMBOL(func);

define_netdev_printk_level(netdev_emerg, KERN_EMERG);
define_netdev_printk_level(netdev_alert, KERN_ALERT);
define_netdev_printk_level(netdev_crit, KERN_CRIT);
define_netdev_printk_level(netdev_err, KERN_ERR);
define_netdev_printk_level(netdev_warn, KERN_WARNING);
define_netdev_printk_level(netdev_notice, KERN_NOTICE);
define_netdev_printk_level(netdev_info, KERN_INFO);

Answered By - Marco Bonelli

Answer Checked By - Robin (WPSolving Admin)