Re: [PATCH] iptables: open eBPF programs in read only mode

[Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>]

On Thu, Mar 19, 2020 at 08:00:15PM -0700, Maciej Żenczykowski wrote:
> From: Maciej Żenczykowski <maze@xxxxxxxxxx>
> 
> Adjust the mode eBPF programs are opened in so 0400 pinned bpf programs
> work without requiring CAP_DAC_OVERRIDE.

Unfortunately this is breaking stuff:

libxt_bpf.c: In function ‘bpf_obj_get_readonly’:
libxt_bpf.c:70:6: error: ‘union bpf_attr’ has no member named ‘file_flags’
   70 |  attr.file_flags = BPF_F_RDONLY;
      |      ^
libxt_bpf.c:70:20: error: ‘BPF_F_RDONLY’ undeclared (first use in this function)
   70 |  attr.file_flags = BPF_F_RDONLY;
      |                    ^~~~~~~~~~~~