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authorDavid Decotigny <decot@googlers.com>2018-01-18 20:59:13 +0300
committerDavid S. Miller <davem@davemloft.net>2018-01-22 23:42:05 +0300
commitb2d3bcfa26a7a8de41f358a6cae8b848673b3c6e (patch)
tree539b5266ff43bf1f842d7cd7dea2c998dff98afd /Documentation/ABI/testing/sysfs-class-net
parente8660ded7f5a9889395d33ce3d5e8c729a462bf5 (diff)
downloadlinux-b2d3bcfa26a7a8de41f358a6cae8b848673b3c6e.tar.xz
net: core: Expose number of link up/down transitions
Expose the number of times the link has been going UP or DOWN, and update the "carrier_changes" counter to be the sum of these two events. While at it, also update the sysfs-class-net documentation to cover: carrier_changes (3.15), carrier_up_count (4.16) and carrier_down_count (4.16) Signed-off-by: David Decotigny <decot@googlers.com> [Florian: * rebase * add documentation * merge carrier_changes with up/down counters] Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/ABI/testing/sysfs-class-net')
-rw-r--r--Documentation/ABI/testing/sysfs-class-net24
1 files changed, 24 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-net b/Documentation/ABI/testing/sysfs-class-net
index 6856da99b6f7..2f1788111cd9 100644
--- a/Documentation/ABI/testing/sysfs-class-net
+++ b/Documentation/ABI/testing/sysfs-class-net
@@ -259,3 +259,27 @@ Contact: netdev@vger.kernel.org
Description:
Symbolic link to the PHY device this network device is attached
to.
+
+What: /sys/class/net/<iface>/carrier_changes
+Date: Mar 2014
+KernelVersion: 3.15
+Contact: netdev@vger.kernel.org
+Description:
+ 32-bit unsigned integer counting the number of times the link has
+ seen a change from UP to DOWN and vice versa
+
+What: /sys/class/net/<iface>/carrier_up_count
+Date: Jan 2018
+KernelVersion: 4.16
+Contact: netdev@vger.kernel.org
+Description:
+ 32-bit unsigned integer counting the number of times the link has
+ been up
+
+What: /sys/class/net/<iface>/carrier_down_count
+Date: Jan 2018
+KernelVersion: 4.16
+Contact: netdev@vger.kernel.org
+Description:
+ 32-bit unsigned integer counting the number of times the link has
+ been down