Re: [PATCH bpf-next v2 1/2] bpf: Allow bpf_get_netns_cookie in BPF_PROG_TYPE_SOCK_OPS
From: Song Liu <song@kernel.org>
Date: 2021-08-18 17:49:53
Also in:
lkml, netdev
On Wed, Aug 18, 2021 at 4:00 AM Xu Liu [off-list ref] 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 <redacted>
Acked-by: Song Liu <redacted>
quoted hunk ↗ jump to hunk
--- 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