Bug 1288

Summary:	af_packet do not support multi-process
Product:	DPDK	Reporter:	zero (779198444)
Component:	ethdev	Assignee:	Stephen Hemminger (stephen)
Status:	UNCONFIRMED ---
Severity:	normal	CC:	stephen
Priority:	Normal
Version:	21.11
Target Milestone:	---
Hardware:	All
OS:	All

Description zero 2023-09-15 04:22:47 CEST

hi,I'm recently have problem in using af_packet,I wanna do init in primary program and do rx_pkt_burst in secondary,so that I can make primary more stable,however, when change eth1 to af_packet, it cause coredump,and when I gdb ,it shows rx_pkt_burst is not init in secondary.
does the af_packet only support primary do rx_pkt_burst?
is there any way if I want to do rx_pkt_burst in a secondary program?

Comment 1 Stephen Hemminger 2023-09-15 17:41:38 CEST

Today, the AF_PACKET driver does not support primary/secondary process.
This should be documented but is not.

The AF_PACKET driver would need to pass file descriptor to secondary process for this to work. See TAP device for how this could be done.