@@ -135,6 +135,7 @@ enum {
IFLA_VF_PORTS,
IFLA_PORT_SELF,
IFLA_AF_SPEC,
+ IFLA_GROUP, /* Group the device belongs to */
__IFLA_MAX
};
@@ -75,6 +75,9 @@ struct wireless_dev;
#define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
#define NET_RX_DROP 1 /* packet dropped */
+/* Initial net device group. All devices belong to group 0 by default. */
+#define INIT_NETDEV_GROUP 0
+
/*
* Transmit return codes: transmit return codes originate from three different
* namespaces:
@@ -1156,6 +1159,9 @@ struct net_device {
/* phy device may attach itself for hardware timestamping */
struct phy_device *phydev;
+
+ /* group the device belongs to */
+ int group;
};
#define to_net_dev(d) container_of(d, struct net_device, dev)
@@ -1847,6 +1853,7 @@ 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);
+extern void dev_set_group(struct net_device *, int);
extern int dev_set_mac_address(struct net_device *,
struct sockaddr *);
extern int dev_hard_start_xmit(struct sk_buff *skb,
@@ -4573,6 +4573,17 @@ int dev_set_mtu(struct net_device *dev, int new_mtu)
EXPORT_SYMBOL(dev_set_mtu);
/**
+ * dev_set_group - Change group this device belongs to
+ * @dev: device
+ * @new_group: group this device should belong to
+ */
+void dev_set_group(struct net_device *dev, int new_group)
+{
+ dev->group = new_group;
+}
+EXPORT_SYMBOL(dev_set_group);
+
+/**
* dev_set_mac_address - Change Media Access Control Address
* @dev: device
* @sa: new address
@@ -5698,6 +5709,7 @@ struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
dev->priv_flags = IFF_XMIT_DST_RELEASE;
setup(dev);
strcpy(dev->name, name);
+ dev->group = INIT_NETDEV_GROUP;
return dev;
free_pcpu:
@@ -868,6 +868,7 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
netif_running(dev) ? dev->operstate : IF_OPER_DOWN);
NLA_PUT_U8(skb, IFLA_LINKMODE, dev->link_mode);
NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
+ NLA_PUT_U32(skb, IFLA_GROUP, dev->group);
if (dev->ifindex != dev->iflink)
NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
@@ -1265,6 +1266,11 @@ static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
modified = 1;
}
+ if (tb[IFLA_GROUP]) {
+ dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
+ modified = 1;
+ }
+
/*
* Interface selected by interface index but interface
* name provided implies that a name change has been
Net devices can now be grouped, enabling simpler manipulation from userspace. This patch adds a group field to the net_device structure, as well as rtnetlink support to query and modify it. Signed-off-by: Vlad Dogaru <ddvlad@rosedu.org> --- include/linux/if_link.h | 1 + include/linux/netdevice.h | 7 +++++++ net/core/dev.c | 12 ++++++++++++ net/core/rtnetlink.c | 6 ++++++ 4 files changed, 26 insertions(+), 0 deletions(-)