On Mon, Aug 16, 2021 at 4:17 PM Prankur gupta <prankgup@xxxxxx> wrote: > > Add logic to call bpf_setsockopt and bpf_getsockopt from > setsockopt BPF programs. > Example use case, when the user sets the IPV6_TCLASS socket option > we would also like to change the tcp-cc for that socket. > We don't have any use case for calling bpf_setsockopt from > supposedly read-only sys_getsockopti, so it is made available to > BPF_CGROUP_SETSOCKOPT only. > > Signed-off-by: Prankur gupta <prankgup@xxxxxx> > --- > kernel/bpf/cgroup.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/kernel/bpf/cgroup.c b/kernel/bpf/cgroup.c > index a1dedba4c174..9c92eff9af95 100644 > --- a/kernel/bpf/cgroup.c > +++ b/kernel/bpf/cgroup.c > @@ -1873,6 +1873,14 @@ cg_sockopt_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_setsockopt: > + if (prog->expected_attach_type == BPF_CGROUP_SETSOCKOPT) > + return &bpf_sk_setsockopt_proto; > + return NULL; > + case BPF_FUNC_getsockopt: > + if (prog->expected_attach_type == BPF_CGROUP_SETSOCKOPT) > + return &bpf_sk_getsockopt_proto; Is there any problem enabling bpf_getsockopt() for BPF_CGROUP_GETSOCKOPT program type? > + return NULL; > #endif > #ifdef CONFIG_INET > case BPF_FUNC_tcp_sock: > -- > 2.30.2 >
