On Tue, Jan 12, 2021 at 9:42 PM Yuri Benditovich
<yuri.benditovich@xxxxxxxxxx> wrote:
>
> This program type can set skb hash value. It will be useful
> when the tun will support hash reporting feature if virtio-net.
>
> Signed-off-by: Yuri Benditovich <yuri.benditovich@xxxxxxxxxx>
> ---
> drivers/net/tun.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/net/tun.c b/drivers/net/tun.c
> index 7959b5c2d11f..455f7afc1f36 100644
> --- a/drivers/net/tun.c
> +++ b/drivers/net/tun.c
> @@ -2981,6 +2981,8 @@ static int tun_set_ebpf(struct tun_struct *tun, struct tun_prog __rcu **prog_p,
> prog = NULL;
> } else {
> prog = bpf_prog_get_type(fd, BPF_PROG_TYPE_SOCKET_FILTER);
> + if (IS_ERR(prog))
> + prog = bpf_prog_get_type(fd, BPF_PROG_TYPE_SCHED_CLS);
> if (IS_ERR(prog))
> return PTR_ERR(prog);
> }
Comment from Alexei Starovoitov:
Patches 1 and 2 are missing for me, so I couldn't review properly,
but this diff looks odd.
It allows sched_cls prog type to attach to tun.
That means everything that sched_cls progs can do will be done from tun hook?
sched_cls assumes l2 and can modify the packet.
I think crashes are inevitable.
> --
> 2.17.1
>
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