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Subject[PATCH 3/4] netdevice.h net/core/dev.c: Convert netdev_<level> logging macros to functions
Date
Reduces an x86 defconfig text and data ~2k.
text is smaller, data is larger.

$ size vmlinux*
text data bss dec hex filename
7198862 720112 1366288 9285262 8dae8e vmlinux
7205273 716016 1366288 9287577 8db799 vmlinux.device_h

Uses %pV and struct va_format
Format arguments are verified before printk

Signed-off-by: Joe Perches <joe@perches.com>
---
include/linux/netdevice.h | 36 ++++++++++++-------------
net/core/dev.c | 62 +++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 79 insertions(+), 19 deletions(-)
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 40291f3..7f3197d 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -2227,25 +2227,23 @@ static inline const char *netdev_name(const struct net_device *dev)
return dev->name;
}

-#define netdev_printk(level, netdev, format, args...) \
- dev_printk(level, (netdev)->dev.parent, \
- "%s: " format, \
- netdev_name(netdev), ##args)
-
-#define netdev_emerg(dev, format, args...) \
- netdev_printk(KERN_EMERG, dev, format, ##args)
-#define netdev_alert(dev, format, args...) \
- netdev_printk(KERN_ALERT, dev, format, ##args)
-#define netdev_crit(dev, format, args...) \
- netdev_printk(KERN_CRIT, dev, format, ##args)
-#define netdev_err(dev, format, args...) \
- netdev_printk(KERN_ERR, dev, format, ##args)
-#define netdev_warn(dev, format, args...) \
- netdev_printk(KERN_WARNING, dev, format, ##args)
-#define netdev_notice(dev, format, args...) \
- netdev_printk(KERN_NOTICE, dev, format, ##args)
-#define netdev_info(dev, format, args...) \
- netdev_printk(KERN_INFO, dev, format, ##args)
+extern int netdev_printk(const char *level, const struct net_device *dev,
+ const char *format, ...)
+ __attribute__ ((format (printf, 3, 4)));
+extern int netdev_emerg(const struct net_device *dev, const char *format, ...)
+ __attribute__ ((format (printf, 2, 3)));
+extern int netdev_alert(const struct net_device *dev, const char *format, ...)
+ __attribute__ ((format (printf, 2, 3)));
+extern int netdev_crit(const struct net_device *dev, const char *format, ...)
+ __attribute__ ((format (printf, 2, 3)));
+extern int netdev_err(const struct net_device *dev, const char *format, ...)
+ __attribute__ ((format (printf, 2, 3)));
+extern int netdev_warn(const struct net_device *dev, const char *format, ...)
+ __attribute__ ((format (printf, 2, 3)));
+extern int netdev_notice(const struct net_device *dev, const char *format, ...)
+ __attribute__ ((format (printf, 2, 3)));
+extern int netdev_info(const struct net_device *dev, const char *format, ...)
+ __attribute__ ((format (printf, 2, 3)));

#if defined(DEBUG)
#define netdev_dbg(__dev, format, args...) \
diff --git a/net/core/dev.c b/net/core/dev.c
index 2b3bf53..6f6e1f4 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5790,6 +5790,68 @@ char *netdev_drivername(const struct net_device *dev, char *buffer, int len)
return buffer;
}

+static int __netdev_printk(const char *level, const struct net_device *dev,
+ struct va_format *vaf)
+{
+ int r;
+
+ if (dev && dev->dev.parent)
+ r = dev_printk(level, dev->dev.parent, "%s: %pV",
+ netdev_name(dev), vaf);
+ else if (dev)
+ r = printk("%s%s: %pV", level, netdev_name(dev), vaf);
+ else
+ r = printk("%s(NULL net_device): %pV", level, vaf);
+
+ return r;
+}
+
+int netdev_printk(const char *level, const struct net_device *dev,
+ const char *format, ...)
+{
+ struct va_format vaf;
+ va_list args;
+ int r;
+
+ va_start(args, format);
+
+ vaf.fmt = format;
+ vaf.va = &args;
+
+ r = __netdev_printk(level, dev, &vaf);
+ va_end(args);
+
+ return r;
+}
+EXPORT_SYMBOL(netdev_printk);
+
+#define define_netdev_printk_level(func, level) \
+int func(const struct net_device *dev, const char *fmt, ...) \
+{ \
+ int r; \
+ struct va_format vaf; \
+ va_list args; \
+ \
+ va_start(args, fmt); \
+ \
+ vaf.fmt = fmt; \
+ vaf.va = &args; \
+ \
+ r = __netdev_printk(level, dev, &vaf); \
+ va_end(args); \
+ \
+ return r; \
+} \
+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);
+
static void __net_exit netdev_exit(struct net *net)
{
kfree(net->dev_name_head);
--
1.7.1.337.g6068.dirty


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