On 2019/12/2 上午12:35, David Ahern wrote:
On 11/26/19 4:07 AM, Prashant Bhole wrote:From: Jason Wang <jasowang@xxxxxxxxxx> 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 <jasowang@xxxxxxxxxx> Signed-off-by: Prashant Bhole <prashantbhole.linux@xxxxxxxxx> --- 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? [1] https://github.com/dsahern/linux/commit/f2303d05187c8a604cdb70b288338e9b1d1b0db6
I think it's fine, btw, except for the netlink part there should be no much difference.
Thanks
