Re: [PATCH v1] net-sysfs: expose permanent hardware address in sysfs
From: Florian Fainelli
Date: Wed May 07 2014 - 01:24:58 EST
Le 05/05/2014 20:34, David Decotigny a écrit :
Tested:
grep . /sys/class/net/*/*addr*
Please also include the relevant sysfs documentation changes in
Documentation/ABI/testing/sysfs-class-net.
Thanks!
Signed-off-by: David Decotigny <decot@xxxxxxxxxxxx>
---
net/core/net-sysfs.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 1cac29e..bf57024 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -127,6 +127,20 @@ static ssize_t address_show(struct device *dev, struct device_attribute *attr,
}
static DEVICE_ATTR_RO(address);
+static ssize_t perm_addr_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct net_device *net = to_net_dev(dev);
+ ssize_t ret = -EINVAL;
+
+ read_lock(&dev_base_lock);
+ if (dev_isalive(net))
+ ret = sysfs_format_mac(buf, net->perm_addr, net->addr_len);
+ read_unlock(&dev_base_lock);
+ return ret;
+}
+static DEVICE_ATTR_RO(perm_addr);
+
static ssize_t broadcast_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -391,6 +405,7 @@ static struct attribute *net_class_attrs[] = {
&dev_attr_addr_len.attr,
&dev_attr_link_mode.attr,
&dev_attr_address.attr,
+ &dev_attr_perm_addr.attr,
&dev_attr_broadcast.attr,
&dev_attr_speed.attr,
&dev_attr_duplex.attr,
--
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