On 02/19/2019 04:57 PM, Jesper Dangaard Brouer wrote:
> On Tue, 19 Feb 2019 12:46:57 +0100
> Daniel Borkmann <dan...@iogearbox.net> wrote:
>
>>> Due to lack of TC examples, lets show howto attach clsact BPF programs:
>>>
>>> # tc qdisc add dev ixgbe2 clsact
>>> # tc filter replace dev ixgbe2 egress bpf da obj XXX_kern.o sec tc_qmap2cpu
>>> # tc filter list dev ixgbe2 egress
>
> Recommending the "replace" is wrong is seems, as does not replace the
> existing, but keeps adding more filter entries.
>
> What is the recommended procedure for unloading and loading a newer
> version of the BPF TC program?
You would need to specify prio / handle in order to select a particular
instance for atomic replacement:
tc filter replace dev foo {e,in}gress prio 1 handle 1 bpf da obj foo.o
