On Thu, Aug 31, 2023 at 8:36 AM Daan De Meyer <daan.j.demeyer@xxxxxxxxx> wrote:
>
> As prep for adding unix socket support to the cgroup sockaddr hooks,
> let's add a kfunc bpf_sock_addr_set_unix_addr() that allows modifying a sockaddr
> from bpf. While this is already possible for AF_INET and AF_INET6, we'll
> need this kfunc when we add unix socket support since modifying the
> address for those requires modifying both the address and the sockaddr
> length.
>
> Signed-off-by: Daan De Meyer <daan.j.demeyer@xxxxxxxxx>
> ---
> kernel/bpf/btf.c | 1 +
> net/core/filter.c | 32 +++++++++++++++++++++++++++++++-
> 2 files changed, 32 insertions(+), 1 deletion(-)
>
> diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c
> index 249657c466dd..15c972f27574 100644
> --- a/kernel/bpf/btf.c
> +++ b/kernel/bpf/btf.c
> @@ -7819,6 +7819,7 @@ static int bpf_prog_type_to_kfunc_hook(enum bpf_prog_type prog_type)
> {
> switch (prog_type) {
> case BPF_PROG_TYPE_UNSPEC:
> + case BPF_PROG_TYPE_CGROUP_SOCK_ADDR:
> return BTF_KFUNC_HOOK_COMMON;
hook_common means that they are shared by all prog types.
See btf_kfunc_id_set_contains().
