[PATCH bpf-next/net v2 2/7] bpf: Allow use of skc_to_mptcp_sock in cg_sockopt

[Matthieu Baerts (NGI0)]

From: Geliang Tang <tanggeli...@kylinos.cn>

Currently, bpf_skc_to_mptcp_sock() helper is not allowed to be used
in cg_sockopt. This patch adds this permission.

Thanks to the previous patch allowing skc_to_mptcp_sock() to be used
with MPTCP sockets, this permission allows this helper to be use it in
CGroup BPF hooks, e.g. [gs]etsocktopt.

Signed-off-by: Geliang Tang <tanggeli...@kylinos.cn>
Reviewed-by: Matthieu Baerts (NGI0) <matt...@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matt...@kernel.org>
---
Notes:
 - v2: new patch.
---
 kernel/bpf/cgroup.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/bpf/cgroup.c b/kernel/bpf/cgroup.c
index 
46e5db65dbc8d8c6591b53dfc77bb689357f33ea..1ca22e4842cf6b6c6bdbc37bf415187e706b2b69
 100644
--- a/kernel/bpf/cgroup.c
+++ b/kernel/bpf/cgroup.c
@@ -2358,6 +2358,8 @@ cg_sockopt_func_proto(enum bpf_func_id func_id, const 
struct bpf_prog *prog)
 #ifdef CONFIG_INET
        case BPF_FUNC_tcp_sock:
                return &bpf_tcp_sock_proto;
+       case BPF_FUNC_skc_to_mptcp_sock:
+               return &bpf_skc_to_mptcp_sock_proto;
 #endif
        case BPF_FUNC_perf_event_output:
                return &bpf_event_output_data_proto;

-- 
2.47.1