From edbc0bb3fb72ec4645a242520cf1d0b9b6b02261 Mon Sep 17 00:00:00 2001
From: Ben Greear <greearb@candelatech.com>
Date: Thu, 29 Mar 2012 12:51:30 +0000
Subject: [PATCH] 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>
---
include/linux/if_link.h | 2 ++
net/core/rtnetlink.c | 3 +++
2 files changed, 5 insertions(+)
diff --git a/include/linux/if_link.h b/include/linux/if_link.h
index 4b24ff453aee..2f4fa93454c7 100644
--- a/include/linux/if_link.h
+++ b/include/linux/if_link.h
@@ -138,6 +138,8 @@ enum {
IFLA_GROUP, /* Group the device belongs to */
IFLA_NET_NS_FD,
IFLA_EXT_MASK, /* Extended info mask, VFs, etc */
+ IFLA_PROMISCUITY, /* Promiscuity count: > 0 means acts PROMISC */
+#define IFLA_PROMISCUITY IFLA_PROMISCUITY
__IFLA_MAX
};
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);
--
2.34.1