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net: openvswitch: store sampling probability in cb.

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When a packet sample is observed, the sampling rate that was used is
important to estimate the real frequency of such event.

Store the probability of the parent sample action in the skb's cb area
and use it in psample action to pass it down to psample module.

Reviewed-by: Aaron Conole <aconole@redhat.com>
Acked-by: Eelco Chaudron <echaudro@redhat.com>
Reviewed-by: Ilya Maximets <i.maximets@ovn.org>
Signed-off-by: Adrian Moreno <amorenoz@redhat.com>
Link: https://patch.msgid.link/20240704085710.353845-7-amorenoz@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Adrian Moreno
2024-07-04 10:56:57 +02:00
committed by Jakub Kicinski
parent aae0b82b46
commit 71763d8a82
4 changed files with 23 additions and 4 deletions
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3
include/uapi/linux/openvswitch.h
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@@ -649,7 +649,8 @@ enum ovs_flow_attr {
* Actions are passed as nested attributes.
*
* Executes the specified actions with the given probability on a per-packet
* basis.
* basis. Nested actions will be able to access the probability value of the
* parent @OVS_ACTION_ATTR_SAMPLE.
*/
enum ovs_sample_attr {
OVS_SAMPLE_ATTR_UNSPEC,