net: Report dev->promiscuity in netlink reports.

The standard ways of probing a device's promiscuity
(ifi_flags, for instance) does not report the actual
state of the device.  This patch adds dev->promiscuity
to the netlink netdevice report so that users can know
for certain if the device is acting PROMISC or not.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 71a1920a23a1..b76f8fa3fc64 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -784,6 +784,7 @@ static noinline size_t if_nlmsg_size(const struct net_device *dev,
                + nla_total_size(4) /* IFLA_MTU */
                + nla_total_size(4) /* IFLA_LINK */
                + nla_total_size(4) /* IFLA_MASTER */
+               + nla_total_size(4) /* IFLA_PROMISCUITY */
                + nla_total_size(1) /* IFLA_OPERSTATE */
                + nla_total_size(1) /* IFLA_LINKMODE */
                + nla_total_size(ext_filter_mask
@@ -901,6 +902,7 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
             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) ||
+            nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
             (dev->ifindex != dev->iflink &&
              nla_put_u32(skb, IFLA_LINK, dev->iflink)) ||
             (dev->master &&
@@ -1117,6 +1119,7 @@ const struct nla_policy ifla_policy[IFLA_MAX+1] = {
         [IFLA_PORT_SELF]        = { .type = NLA_NESTED },
         [IFLA_AF_SPEC]          = { .type = NLA_NESTED },
         [IFLA_EXT_MASK]         = { .type = NLA_U32 },
+        [IFLA_PROMISCUITY]      = { .type = NLA_U32 },
 };
 EXPORT_SYMBOL(ifla_policy);