rtnl: export physical port id via RT netlink

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Acked-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Narendra K <narendra_k@dell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 24 insertions, 1 deletions

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 3de740834d1f..0b2972c59b97 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -767,7 +767,8 @@ static noinline size_t if_nlmsg_size(const struct net_device *dev,
                + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
                + rtnl_port_size(dev) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
                + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
-               + rtnl_link_get_af_size(dev); /* IFLA_AF_SPEC */
+               + rtnl_link_get_af_size(dev) /* IFLA_AF_SPEC */
+               + nla_total_size(MAX_PHYS_PORT_ID_LEN); /* IFLA_PHYS_PORT_ID */
 }
 
 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
@@ -846,6 +847,24 @@ static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev)
         return 0;
 }
 
+static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
+{
+        int err;
+        struct netdev_phys_port_id ppid;
+
+        err = dev_get_phys_port_id(dev, &ppid);
+        if (err) {
+                if (err == -EOPNOTSUPP)
+                        return 0;
+                return err;
+        }
+
+        if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
+                return -EMSGSIZE;
+
+        return 0;
+}
+
 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
                             int type, u32 pid, u32 seq, u32 change,
                             unsigned int flags, u32 ext_filter_mask)
@@ -913,6 +932,9 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
                         goto nla_put_failure;
         }
 
+        if (rtnl_phys_port_id_fill(skb, dev))
+                goto nla_put_failure;
+
         attr = nla_reserve(skb, IFLA_STATS,
                         sizeof(struct rtnl_link_stats));
         if (attr == NULL)
@@ -1113,6 +1135,7 @@ const struct nla_policy ifla_policy[IFLA_MAX+1] = {
         [IFLA_PROMISCUITY]      = { .type = NLA_U32 },
         [IFLA_NUM_TX_QUEUES]    = { .type = NLA_U32 },
         [IFLA_NUM_RX_QUEUES]    = { .type = NLA_U32 },
+        [IFLA_PHYS_PORT_ID]     = { .type = NLA_BINARY, .len = MAX_PHYS_PORT_ID_LEN },
 };
 EXPORT_SYMBOL(ifla_policy);