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net: Introduce netdev_*_once functions

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Extend the net device error logging with netdev_*_once macros.
netdev_*_once are the equivalents of the dev_*_once macros which are
useful for messages that should only be logged once.

Also add netdev_WARN_ONCE, which is the "once" extension for the already
existing netdev_WARN macro.

Signed-off-by: Gal Pressman <galp@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Gal Pressman 2017-09-17 13:43:58 +03:00 committed by Saeed Mahameed
parent 355368d530
commit 375ef2b1f0
1 changed files with 29 additions and 0 deletions
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29
include/linux/netdevice.h
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@ -4336,6 +4336,31 @@ void netdev_notice(const struct net_device *dev, const char *format, ...);
__printf(2, 3)
void netdev_info(const struct net_device *dev, const char *format, ...);
#define netdev_level_once(level, dev, fmt, ...) \
do { \
static bool __print_once __read_mostly; \
\
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__)
#define MODULE_ALIAS_NETDEV(device) \
MODULE_ALIAS("netdev-" device)
@ -4376,6 +4401,10 @@ do { \
WARN(1, "netdevice: %s%s\n" format, netdev_name(dev), \
netdev_reg_state(dev), ##args)
#define netdev_WARN_ONCE(dev, condition, format, arg...) \
WARN_ONCE(1, "netdevice: %s%s\n" format, netdev_name(dev) \
netdev_reg_state(dev), ##args)
/* netif printk helpers, similar to netdev_printk */
#define netif_printk(priv, type, level, dev, fmt, args...) \