[PATCH] app/testpmd: fix parsing for connection tracking item

[Maayan Kashani]

Sure,
This is an example of using connection tracking with testpmd:

start
    set verbose 1
    set conntrack com peer 1 is_orig 1 enable 1 live 1 sack 1 cack 0 last_dir 0 liberal 0 state 1 max_ack_win 7 r_lim 5 last_win 510 last_seq 2632987379 last_ack 2532480967 last_end 2632987379 last_index 0x8
    set conntrack orig scale 7 fin 0 acked 1 unack_data 0 sent_end 2632987379 reply_end 2633016339 max_win 28960 max_ack 2632987379
    set conntrack rply scale 7 fin 0 acked 1 unack_data 0 sent_end 2532480967 reply_end 2532546247 max_win 65280 max_ack 2532480967
    flow indirect_action 0 create ingress action conntrack / end

    flow create 0 group 3 ingress pattern eth / ipv4 / tcp / end actions indirect 0 / jump group 5 / end

    flow create 0 group 5 ingress pattern eth / ipv4 / tcp / conntrack is 1 / end actions queue index 5 / end

before my changes, conntracking was missed in the flow items list i got from the parsing of testpmd for the second flow created.
I just aligned the parsing of connection tracking to be the same as other items.(e.g ITEM_PORT_REPRESENTOR)


Regards,
Maayan Kashani

> -----Original Message-----
> From: Ferruh Yigit <ferruh.yigit at amd.com>
> Sent: Wednesday, 12 June 2024 19:35
> To: Maayan Kashani <mkashani at nvidia.com>; dev at dpdk.org
> Cc: Dariusz Sosnowski <dsosnowski at nvidia.com>; Raslan Darawsheh
> <rasland at nvidia.com>; stable at dpdk.org; Ori Kam <orika at nvidia.com>;
> Aman Singh <aman.deep.singh at intel.com>; Yuying Zhang
> <yuying.zhang at intel.com>; Bing Zhao <bingz at nvidia.com>
> Subject: Re: [PATCH] app/testpmd: fix parsing for connection tracking item
> 
> External email: Use caution opening links or attachments
> 
> 
> On 6/2/2024 11:23 AM, Maayan Kashani wrote:
> > In command line translation there were missing fields for connection
> > tracking item, as a result this item was not parsed and was missing
> > from the items list received from test-pmd.
> >
> > Fixes: 4d07cbefe3ba ("app/testpmd: add commands for conntrack")
> > Cc: stable at dpdk.org
> > Signed-off-by: Maayan Kashani <mkashani at nvidia.com>
> >
> 
> Hi Maayan,
> 
> I can't really trace why .priv and 'parse_vc' is required, can you please help
> understanding by providing more data?
> 
> What was the old testpmd command and what was old behavior with that
> command, why it was wrong?
> What is the new behavior and why this update was needed, how new code
> solved the issue?
> 
> testpmd flow command is still somewhat cryptic to me, and without running
> code and debugging it is very hard for me to detect the missing parts.
> 
> 
> > ---
> >  app/test-pmd/cmdline_flow.c | 3 +++
> >  1 file changed, 3 insertions(+)
> >
> > diff --git a/app/test-pmd/cmdline_flow.c b/app/test-pmd/cmdline_flow.c
> > index 60ee9337cf..1f9d5ebd05 100644
> > --- a/app/test-pmd/cmdline_flow.c
> > +++ b/app/test-pmd/cmdline_flow.c
> > @@ -5797,9 +5797,12 @@ static const struct token token_list[] = {
> >       [ITEM_CONNTRACK] = {
> >               .name = "conntrack",
> >               .help = "conntrack state",
> > +             .priv = PRIV_ITEM(CONNTRACK,
> > +                               sizeof(struct
> > + rte_flow_item_conntrack)),
> >               .next = NEXT(NEXT_ENTRY(ITEM_NEXT),
> NEXT_ENTRY(COMMON_UNSIGNED),
> >                            item_param),
> >               .args = ARGS(ARGS_ENTRY(struct rte_flow_item_conntrack,
> > flags)),
> > +             .call = parse_vc,
> >       },
> >       [ITEM_PORT_REPRESENTOR] = {
> >               .name = "port_representor",