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authorStephen Hemminger <shemminger@vyatta.com>2008-09-22 21:28:11 -0700
committerDavid S. Miller <davem@davemloft.net>2008-09-22 21:28:11 -0700
commit0b815a1a6d43ab498674b8430c8c35ab08487a16 (patch)
tree18ea2e50f36c1d38127c535f619e80209bfc4e07 /net/core/dev.c
parent83bfba5fca16d040bb78a24148da844db3de6a76 (diff)
net: network device name ifalias support
This patch add support for keeping an additional character alias associated with an network interface. This is useful for maintaining the SNMP ifAlias value which is a user defined value. Routers use this to hold information like which circuit or line it is connected to. It is just an arbitrary text label on the network device. There are two exposed interfaces with this patch, the value can be read/written either via netlink or sysfs. This could be maintained just by the snmp daemon, but it is more generally useful for other management tools, and the kernel is good place to act as an agreed upon interface to store it. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/dev.c')
-rw-r--r--net/core/dev.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index fdfc4b6a6448..e91390533999 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -954,6 +954,29 @@ rollback:
}
/**
+ * dev_set_alias - change ifalias of a device
+ * @dev: device
+ * @alias: name up to IFALIASZ
+ *
+ * Set ifalias for a device,
+ */
+int dev_set_alias(struct net_device *dev, const char *alias, size_t len)
+{
+ ASSERT_RTNL();
+
+ if (len >= IFALIASZ)
+ return -EINVAL;
+
+ dev->ifalias = krealloc(dev->ifalias, len+1, GFP_KERNEL);
+ if (!dev->ifalias)
+ return -ENOMEM;
+
+ strlcpy(dev->ifalias, alias, len+1);
+ return len;
+}
+
+
+/**
* netdev_features_change - device changes features
* @dev: device to cause notification
*