[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [RFC net-next 07/18] tun: set offloaded xdp program

From: Jason Wang
Subject: Re: [RFC net-next 07/18] tun: set offloaded xdp program
Date: Mon, 2 Dec 2019 10:44:37 +0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0

On 2019/12/2 上午12:35, David Ahern wrote:
On 11/26/19 4:07 AM, Prashant Bhole wrote:
From: Jason Wang <address@hidden>

This patch introduces an ioctl way to set an offloaded XDP program
to tun driver. This ioctl will be used by qemu to offload XDP program
from virtio_net in the guest.

Signed-off-by: Jason Wang <address@hidden>
Signed-off-by: Prashant Bhole <address@hidden>
  drivers/net/tun.c           | 19 ++++++++++++++-----
  include/uapi/linux/if_tun.h |  1 +
  2 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index d078b4659897..ecb49101b0b5 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -241,6 +241,7 @@ struct tun_struct {
        struct bpf_prog __rcu *xdp_prog;
        struct tun_prog __rcu *steering_prog;
        struct tun_prog __rcu *filter_prog;
+       struct tun_prog __rcu *offloaded_xdp_prog;
I have been looking into running XDP pograms in the TX path of a tap
device [1] where the program is installed and managed by a process in
the host. The code paths are the same as what you are doing with XDP
offload, so how about calling this xdp_prog_tx?


I think it's fine, btw, except for the netlink part there should be no much difference.


reply via email to

[Prev in Thread] Current Thread [Next in Thread]