net/sched: Introduce sample tc action
This action allows the user to sample traffic matched by tc classifier.
The sampling consists of choosing packets randomly and sampling them using
the psample module. The user can configure the psample group number, the
sampling rate and the packet's truncation (to save kernel-user traffic).
Example:
To sample ingress traffic from interface eth1, one may use the commands:
tc qdisc add dev eth1 handle ffff: ingress
tc filter add dev eth1 parent ffff: \
matchall action sample rate 12 group 4
Where the first command adds an ingress qdisc and the second starts
sampling randomly with an average of one sampled packet per 12 packets on
dev eth1 to psample group 4.
Signed-off-by: Yotam Gigi <yotamg@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/Kconfig b/net/sched/Kconfig
index a9aa38d..72cfa3a 100644
--- a/net/sched/Kconfig
+++ b/net/sched/Kconfig
@@ -650,6 +650,18 @@
To compile this code as a module, choose M here: the
module will be called act_mirred.
+config NET_ACT_SAMPLE
+ tristate "Traffic Sampling"
+ depends on NET_CLS_ACT
+ select PSAMPLE
+ ---help---
+ Say Y here to allow packet sampling tc action. The packet sample
+ action consists of statistically choosing packets and sampling
+ them using the psample module.
+
+ To compile this code as a module, choose M here: the
+ module will be called act_sample.
+
config NET_ACT_IPT
tristate "IPtables targets"
depends on NET_CLS_ACT && NETFILTER && IP_NF_IPTABLES