On Wed, Aug 18, 2021 at 4:00 AM Xu Liu <[email protected]> wrote:
>
> We'd like to be able to identify netns from sockops hooks
> to accelerate local process communication form different netns.
>
> Signed-off-by: Xu Liu <[email protected]>
Acked-by: Song Liu <[email protected]>
> ---
> net/core/filter.c | 14 ++++++++++++++
> 1 file changed, 14 insertions(+)
>
> diff --git a/net/core/filter.c b/net/core/filter.c
> index d70187ce851b..34938a537931 100644
> --- a/net/core/filter.c
> +++ b/net/core/filter.c
> @@ -4664,6 +4664,18 @@ static const struct bpf_func_proto bpf_get_netns_cookie_sock_addr_proto = {
> .arg1_type = ARG_PTR_TO_CTX_OR_NULL,
> };
>
> +BPF_CALL_1(bpf_get_netns_cookie_sock_ops, struct bpf_sock_ops_kern *, ctx)
> +{
> + return __bpf_get_netns_cookie(ctx ? ctx->sk : NULL);
> +}
> +
> +static const struct bpf_func_proto bpf_get_netns_cookie_sock_ops_proto = {
> + .func = bpf_get_netns_cookie_sock_ops,
> + .gpl_only = false,
> + .ret_type = RET_INTEGER,
> + .arg1_type = ARG_PTR_TO_CTX_OR_NULL,
> +};
> +
> BPF_CALL_1(bpf_get_socket_uid, struct sk_buff *, skb)
> {
> struct sock *sk = sk_to_full_sk(skb->sk);
> @@ -7445,6 +7457,8 @@ sock_ops_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
> return &bpf_sk_storage_get_proto;
> case BPF_FUNC_sk_storage_delete:
> return &bpf_sk_storage_delete_proto;
> + case BPF_FUNC_get_netns_cookie:
> + return &bpf_get_netns_cookie_sock_ops_proto;
> #ifdef CONFIG_INET
> case BPF_FUNC_load_hdr_opt:
> return &bpf_sock_ops_load_hdr_opt_proto;
> --
> 2.28.0
>