bonding: add netlink attributes to slave link dev
If link is IFF_SLAVE, extend link dev netlink attributes to include
slave attributes with new IFLA_SLAVE nest. Add netlink notification
(RTM_NEWLINK) when slave status changes from backup to active, or
visa-versa.
Adds new ndo_get_slave op to net_device_ops to fill skb with IFLA_SLAVE
attributes. Currently only used by bonding driver, but could be
used by other aggregating devices with slaves.
Signed-off-by: Scott Feldman <sfeldma@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/bonding/bond_netlink.c b/drivers/net/bonding/bond_netlink.c
index 555c783..21c6488 100644
--- a/drivers/net/bonding/bond_netlink.c
+++ b/drivers/net/bonding/bond_netlink.c
@@ -22,6 +22,42 @@
#include <linux/reciprocal_div.h>
#include "bonding.h"
+int bond_get_slave(struct net_device *slave_dev, struct sk_buff *skb)
+{
+ struct slave *slave = bond_slave_get_rtnl(slave_dev);
+ const struct aggregator *agg;
+
+ if (nla_put_u8(skb, IFLA_SLAVE_STATE, bond_slave_state(slave)))
+ goto nla_put_failure;
+
+ if (nla_put_u8(skb, IFLA_SLAVE_MII_STATUS, slave->link))
+ goto nla_put_failure;
+
+ if (nla_put_u32(skb, IFLA_SLAVE_LINK_FAILURE_COUNT,
+ slave->link_failure_count))
+ goto nla_put_failure;
+
+ if (nla_put(skb, IFLA_SLAVE_PERM_HWADDR,
+ slave_dev->addr_len, slave->perm_hwaddr))
+ goto nla_put_failure;
+
+ if (nla_put_u16(skb, IFLA_SLAVE_QUEUE_ID, slave->queue_id))
+ goto nla_put_failure;
+
+ if (slave->bond->params.mode == BOND_MODE_8023AD) {
+ agg = SLAVE_AD_INFO(slave).port.aggregator;
+ if (agg)
+ if (nla_put_u16(skb, IFLA_SLAVE_AD_AGGREGATOR_ID,
+ agg->aggregator_identifier))
+ goto nla_put_failure;
+ }
+
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
static const struct nla_policy bond_policy[IFLA_BOND_MAX + 1] = {
[IFLA_BOND_MODE] = { .type = NLA_U8 },
[IFLA_BOND_ACTIVE_SLAVE] = { .type = NLA_U32 },