diff options
| author | Stanislav Fomichev <sdf@google.com> | 2021-08-13 16:05:29 -0700 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2021-08-13 17:50:40 -0700 |
| commit | f1248dee954c2ddb0ece47a13591e5d55d422d22 (patch) | |
| tree | e1e48399edff91646fe3bff2ff25575e3c7dbab6 /kernel/bpf/cgroup.c | |
| parent | d164dd9a5c08c16a883b3de97d13948c7be7fa4d (diff) | |
bpf: Allow bpf_get_netns_cookie in BPF_PROG_TYPE_CGROUP_SOCKOPT
This is similar to existing BPF_PROG_TYPE_CGROUP_SOCK
and BPF_PROG_TYPE_CGROUP_SOCK_ADDR.
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20210813230530.333779-2-sdf@google.com
Diffstat (limited to 'kernel/bpf/cgroup.c')
| -rw-r--r-- | kernel/bpf/cgroup.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/kernel/bpf/cgroup.c b/kernel/bpf/cgroup.c index b567ca46555c..9f6070369caa 100644 --- a/kernel/bpf/cgroup.c +++ b/kernel/bpf/cgroup.c @@ -1846,11 +1846,29 @@ const struct bpf_verifier_ops cg_sysctl_verifier_ops = { const struct bpf_prog_ops cg_sysctl_prog_ops = { }; +#ifdef CONFIG_NET +BPF_CALL_1(bpf_get_netns_cookie_sockopt, struct bpf_sockopt_kern *, ctx) +{ + const struct net *net = ctx ? sock_net(ctx->sk) : &init_net; + + return net->net_cookie; +} + +static const struct bpf_func_proto bpf_get_netns_cookie_sockopt_proto = { + .func = bpf_get_netns_cookie_sockopt, + .gpl_only = false, + .ret_type = RET_INTEGER, + .arg1_type = ARG_PTR_TO_CTX_OR_NULL, +}; +#endif + static const struct bpf_func_proto * cg_sockopt_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog) { switch (func_id) { #ifdef CONFIG_NET + case BPF_FUNC_get_netns_cookie: + return &bpf_get_netns_cookie_sockopt_proto; case BPF_FUNC_sk_storage_get: return &bpf_sk_storage_get_proto; case BPF_FUNC_sk_storage_delete: |