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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 /include
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 'include')
-rw-r--r--include/linux/if.h1
-rw-r--r--include/linux/if_link.h1
-rw-r--r--include/linux/netdevice.h3
3 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/if.h b/include/linux/if.h
index 5c9d1fa93fe..65246846c84 100644
--- a/include/linux/if.h
+++ b/include/linux/if.h
@@ -24,6 +24,7 @@
#include <linux/compiler.h> /* for "__user" et al */
#define IFNAMSIZ 16
+#define IFALIASZ 256
#include <linux/hdlc/ioctl.h>
/* Standard interface flags (netdevice->flags). */
diff --git a/include/linux/if_link.h b/include/linux/if_link.h
index 84c3492ae5c..f9032c88716 100644
--- a/include/linux/if_link.h
+++ b/include/linux/if_link.h
@@ -79,6 +79,7 @@ enum
IFLA_LINKINFO,
#define IFLA_LINKINFO IFLA_LINKINFO
IFLA_NET_NS_PID,
+ IFLA_IFALIAS,
__IFLA_MAX
};
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 488c56e649b..d675df08b94 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -471,6 +471,8 @@ struct net_device
char name[IFNAMSIZ];
/* device name hash chain */
struct hlist_node name_hlist;
+ /* snmp alias */
+ char *ifalias;
/*
* I/O specific fields
@@ -1224,6 +1226,7 @@ extern int dev_ethtool(struct net *net, struct ifreq *);
extern unsigned dev_get_flags(const struct net_device *);
extern int dev_change_flags(struct net_device *, unsigned);
extern int dev_change_name(struct net_device *, char *);
+extern int dev_set_alias(struct net_device *, const char *, size_t);
extern int dev_change_net_namespace(struct net_device *,
struct net *, const char *);
extern int dev_set_mtu(struct net_device *, int);