[net-next PATCH 1/3] net: ethtool: Add Multicast and broadcast rate limit coalescing feature

From: Mugunthan V N
Date: Tue Jul 08 2014 - 04:57:58 EST

Add ability to limit the broadcast or multicast packets to prevent
the loading of the CPU by a hacker with a broadcast or multicast
packet flood.

Signed-off-by: Mugunthan V N <mugunthanvnm@xxxxxx>
include/uapi/linux/ethtool.h | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
index e3c7a71..96ade34 100644
--- a/include/uapi/linux/ethtool.h
+++ b/include/uapi/linux/ethtool.h
@@ -350,6 +350,8 @@ struct ethtool_modinfo {
* a TX interrupt, when the packet rate is above @pkt_rate_high.
* @rate_sample_interval: How often to do adaptive coalescing packet rate
* sampling, measured in seconds. Must not be zero.
+ * @rx_max_mcast: Threshold for high multicast packet rate (packets per second)
+ * @rx_max_bcast: Threshold for high broadcast packet rate (packets per second)
* Each pair of (usecs, max_frames) fields specifies that interrupts
* should be coalesced until
@@ -400,6 +402,8 @@ struct ethtool_coalesce {
__u32 tx_coalesce_usecs_high;
__u32 tx_max_coalesced_frames_high;
__u32 rate_sample_interval;
+ __u32 rx_max_mcast;
+ __u32 rx_max_bcast;


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