netdev - Re: [PATCH iproute2 2/2] vrf: fix ip vrf exec with libbpf

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Date:   Sun, 17 Jan 2021 20:53:18 -0700
From:   David Ahern <dsahern@...il.com>
To:     Luca Boccassi <bluca@...ian.org>, netdev@...r.kernel.org
Cc:     stephen@...workplumber.org
Subject: Re: [PATCH iproute2 2/2] vrf: fix ip vrf exec with libbpf

On 1/17/21 3:54 PM, Luca Boccassi wrote:
> The size of bpf_insn is passed to bpf_load_program instead of the number
> of elements as it expects, so ip vrf exec fails with:
> 
> $ sudo ip link add vrf-blue type vrf table 10
> $ sudo ip link set dev vrf-blue up
> $ sudo ip/ip vrf exec vrf-blue ls
> Failed to load BPF prog: 'Invalid argument'
> last insn is not an exit or jmp
> processed 0 insns (limit 1000000) max_states_per_insn 0 total_states 0 peak_states 0 mark_read 0
> Kernel compiled with CGROUP_BPF enabled?
> 
> https://bugs.debian.org/980046
> 
> Reported-by: Emmanuel DECAEN <Emmanuel.Decaen@...lto.com>
> 
> Signed-off-by: Luca Boccassi <bluca@...ian.org>
> ---
>  lib/bpf_glue.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 



Reviewed-by: David Ahern <dsahern@...nel.org>