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net: print net_device reg_state in netdev_* unless it's registered

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This way we'll always know in what status the device is, unless it's
running normally (i.e. NETDEV_REGISTERED).

Also, emit a warning once in case of a bad reg_state.

CC: "David S. Miller" <davem@davemloft.net>
CC: Jason Baron <jbaron@akamai.com>
CC: Eric Dumazet <edumazet@google.com>
CC: Vlad Yasevich <vyasevic@redhat.com>
CC: stephen hemminger <stephen@networkplumber.org>
CC: Jerry Chu <hkchu@google.com>
CC: Ben Hutchings <bhutchings@solarflare.com>
CC: Joe Perches <joe@perches.com>
Signed-off-by: Veaceslav Falico <vfalico@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Veaceslav Falico 2014-07-17 19:46:10 +02:00 • committed by David S. Miller
parent c6f854d57d
commit ccc7f4968a
3 changed files with 27 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

18
include/linux/netdevice.h
View file

@ -3388,6 +3388,21 @@ static inline const char *netdev_name(const struct net_device *dev)
return dev->name; return dev->name;
} }
static inline const char *netdev_reg_state(const struct net_device *dev)
{
switch (dev->reg_state) {
case NETREG_UNINITIALIZED: return " (uninitialized)";
case NETREG_REGISTERED: return "";
case NETREG_UNREGISTERING: return " (unregistering)";
case NETREG_UNREGISTERED: return " (unregistered)";
case NETREG_RELEASED: return " (released)";
case NETREG_DUMMY: return " (dummy)";
}
WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, dev->reg_state);
return " (unknown)";
}
__printf(3, 4) __printf(3, 4)
int netdev_printk(const char *level, const struct net_device *dev, int netdev_printk(const char *level, const struct net_device *dev,
const char *format, ...); const char *format, ...);
@ -3444,7 +3459,8 @@ do { \
* file/line information and a backtrace. * file/line information and a backtrace.
*/ */
#define netdev_WARN(dev, format, args...) \ #define netdev_WARN(dev, format, args...) \
WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args) WARN(1, "netdevice: %s%s\n" format, netdev_name(dev), \
netdev_reg_state(dev), ##args)
/* netif printk helpers, similar to netdev_printk */ /* netif printk helpers, similar to netdev_printk */

8
lib/dynamic_debug.c
View file

@ -614,13 +614,15 @@ int __dynamic_netdev_dbg(struct _ddebug *descriptor,
char buf[PREFIX_SIZE]; char buf[PREFIX_SIZE];
res = dev_printk_emit(7, dev->dev.parent, res = dev_printk_emit(7, dev->dev.parent,
"%s%s %s %s: %pV", "%s%s %s %s%s: %pV",
dynamic_emit_prefix(descriptor, buf), dynamic_emit_prefix(descriptor, buf),
dev_driver_string(dev->dev.parent), dev_driver_string(dev->dev.parent),
dev_name(dev->dev.parent), dev_name(dev->dev.parent),
netdev_name(dev), &vaf); netdev_name(dev), netdev_reg_state(dev),
&vaf);
} else if (dev) { } else if (dev) {
res = printk(KERN_DEBUG "%s: %pV", netdev_name(dev), &vaf); res = printk(KERN_DEBUG "%s%s: %pV", netdev_name(dev),
netdev_reg_state(dev), &vaf);
} else { } else {
res = printk(KERN_DEBUG "(NULL net_device): %pV", &vaf); res = printk(KERN_DEBUG "(NULL net_device): %pV", &vaf);
} }

8
net/core/dev.c
View file

@ -6950,12 +6950,14 @@ static int __netdev_printk(const char *level, const struct net_device *dev,
if (dev && dev->dev.parent) { if (dev && dev->dev.parent) {
r = dev_printk_emit(level[1] - '0', r = dev_printk_emit(level[1] - '0',
dev->dev.parent, dev->dev.parent,
"%s %s %s: %pV", "%s %s %s%s: %pV",
dev_driver_string(dev->dev.parent), dev_driver_string(dev->dev.parent),
dev_name(dev->dev.parent), dev_name(dev->dev.parent),
netdev_name(dev), vaf); netdev_name(dev), netdev_reg_state(dev),
vaf);
} else if (dev) { } else if (dev) {
r = printk("%s%s: %pV", level, netdev_name(dev), vaf); r = printk("%s%s%s: %pV", level, netdev_name(dev),
netdev_reg_state(dev), vaf);
} else { } else {
r = printk("%s(NULL net_device): %pV", level, vaf); r = printk("%s(NULL net_device): %pV", level, vaf);
} }