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Date: Thu, 9 Nov 2017 14:15:48 +0900 From: Saeed Mahameed <saeedm@...lanox.com> To: "David S. Miller" <davem@...emloft.net> Cc: netdev@...r.kernel.org, Gal Pressman <galp@...lanox.com>, Saeed Mahameed <saeedm@...lanox.com> Subject: [net-next 3/8] net: Introduce netdev_*_once functions From: Gal Pressman <galp@...lanox.com> 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@...lanox.com> Signed-off-by: Saeed Mahameed <saeedm@...lanox.com> --- include/linux/netdevice.h | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 30f0f2928808..79518ede3170 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -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...) \ -- 2.13.6
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