[PATCH] net: show stopped status in sysfs
From: "Michael S. Tsirkin" <mst@redhat.com>
Date: 2010-05-03 21:28:32
Subsystem:
networking [general], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
When debugging faulty hardware (in case of virt, faulty emulation) I found it helpful to be able to examine stopped status of the interface. The following patch makes this visible in sysfs. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> --- net/core/net-sysfs.c | 11 +++++++++++ 1 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index c57c4b2..e1f80c0 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c@@ -132,6 +132,16 @@ static ssize_t show_carrier(struct device *dev, return -EINVAL; } +static ssize_t show_stopped(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct net_device *netdev = to_net_dev(dev); + if (netif_running(netdev)) { + return sprintf(buf, fmt_dec, !!netif_queue_stopped(netdev)); + } + return -EINVAL; +} + static ssize_t show_speed(struct device *dev, struct device_attribute *attr, char *buf) {
@@ -303,6 +313,7 @@ static struct device_attribute net_class_attributes[] = { __ATTR(address, S_IRUGO, show_address, NULL), __ATTR(broadcast, S_IRUGO, show_broadcast, NULL), __ATTR(carrier, S_IRUGO, show_carrier, NULL), + __ATTR(carrier, S_IRUGO, show_stopped, NULL), __ATTR(speed, S_IRUGO, show_speed, NULL), __ATTR(duplex, S_IRUGO, show_duplex, NULL), __ATTR(dormant, S_IRUGO, show_dormant, NULL),
--
1.7.1.rc1.22.g3163