Re: XDP_REDIRECT not working in XDP_DRV_MODE with Intel xgbe driver

On Tue, Feb 15, 2022 at 5:04 AM Jesper Dangaard Brouer
<[email protected]> wrote:

> On 14/02/2022 19.10, Sophia Yoo wrote:

> > I am relatively new to BPF/XDP [...]

> I see you come for academia, so I will recommend reading our XDP paper
> as a start:
>   https://github.com/xdp-project/xdp-paper

> Title: “The eXpress Data Path: Fast Programmable Packet Processing in
> the Operating System Kernel” which was presented at ACM CoNEXT 2018 on
> December 5th, 2018.

Cool! I had briefly read this paper before but didn't realize you and
Toke were authors of this work. Great to chat with you. I'll also take
a closer look at this paper again, it looks like a great resource.

> [...]
> > My NIC driver is Intel xgbe. I am using bcc to attach and load my xdp
> > and tc programs.

> This "xgbe" driver doesn't exist in the kernel tree under Intel.
> Are you sure this is the correct driver?

Whoops, I misspelled the driver name, the driver is actually "ixgbe"
(confirmed with the output of "lspci -v").

03:00.0 Ethernet controller: Intel Corporation Ethernet Connection
X552 10 GbE SFP+
Subsystem: Intel Corporation Ethernet Connection X552 10 GbE SFP+
Physical Slot: 0-2
Flags: bus master, fast devsel, latency 0, IRQ 35, NUMA node 0
Memory at 383fffc00000 (64-bit, prefetchable) [size=2M]
Memory at 383fffe04000 (64-bit, prefetchable) [size=16K]
Expansion ROM at fb980000 [disabled] [size=512K]
Capabilities: [40] Power Management version 3
Capabilities: [50] MSI: Enable- Count=1/1 Maskable+ 64bit+
Capabilities: [70] MSI-X: Enable+ Count=64 Masked-
Capabilities: [a0] Express Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
Capabilities: [140] Device Serial Number 00-00-c9-ff-ff-00-00-00
Capabilities: [150] Alternative Routing-ID Interpretation (ARI)
Capabilities: [160] Single Root I/O Virtualization (SR-IOV)
Capabilities: [1b0] Access Control Services
Capabilities: [1c0] Latency Tolerance Reporting
Kernel driver in use: ixgbe
Kernel modules: ixgbe


--Sophia