netdevice.h: Add netdev_printk helpers like dev_printk

These netdev_printk routines take a struct net_device * and emit
dev_printk logging messages adding "%s: " ... netdev->dev.parent
to the dev_printk format and arguments.

This can create some uniformity in the output message log.

These helpers should not be used until a successful alloc_netdev.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 71 insertions, 0 deletions

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index cdf53a8d9ff..a51228ac933 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -2095,6 +2095,77 @@ static inline u32 dev_ethtool_get_flags(struct net_device *dev)
                 return 0;
         return dev->ethtool_ops->get_flags(dev);
 }
+
+/* Logging, debugging and troubleshooting/diagnostic helpers. */
+
+/* netdev_printk helpers, similar to dev_printk */
+
+static inline const char *netdev_name(const struct net_device *dev)
+{
+        if (dev->reg_state != NETREG_REGISTERED)
+                return "(unregistered net_device)";
+        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)
+
+#if defined(DEBUG)
+#define netdev_dbg(__dev, format, args...)                      \
+        netdev_printk(KERN_DEBUG, __dev, format, ##args)
+#elif defined(CONFIG_DYNAMIC_DEBUG)
+#define netdev_dbg(__dev, format, args...)                      \
+do {                                                            \
+        dynamic_dev_dbg((__dev)->dev.parent, "%s: " format,     \
+                        netdev_name(__dev), ##args);            \
+} while (0)
+#else
+#define netdev_dbg(__dev, format, args...)                      \
+({                                                              \
+        if (0)                                                  \
+                netdev_printk(KERN_DEBUG, __dev, format, ##args); \
+        0;                                                      \
+})
+#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
+
+/*
+ * netdev_WARN() acts like dev_printk(), but with the key difference
+ * of using a WARN/WARN_ON to get the message out, including the
+ * file/line information and a backtrace.
+ */
+#define netdev_WARN(dev, format, args...)                       \
+        WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
+
+
 #endif /* __KERNEL__ */
 
 #endif  /* _LINUX_NETDEVICE_H */