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From: Ivan Malov <ivan.malov@arknetworks.am>
To: Junlong Wang <wang.junlong1@zte.com.cn>
Cc: stephen@networkplumber.org, chen.bingbin@zte.com.cn, dev@dpdk.org
Subject: Re: [v4,2/2] net/zxdh: add support flow director ops
Date: Tue, 12 Aug 2025 11:36:07 +0400 (+04)	[thread overview]
Message-ID: <5f681ac0-24d2-ea14-93a2-f78f22c494ac@arknetworks.am> (raw)
In-Reply-To: <20250812071904.2104777-1-wang.junlong1@zte.com.cn>

[-- Attachment #1: Type: text/plain, Size: 2272 bytes --]

Hi,

On Tue, 12 Aug 2025, Junlong Wang wrote:

> 
> > > 1) If both 'spec' and 'mask' are 'NULL', shouldn't the code set some broader
> > > match on the sole presence of a Ethernet header?
> > > 2) If 'mask' is 'NULL' and 'spec' is not (or vice versa), isn't this an error?
> 
> > >> +            break;
> > >> +        case RTE_FLOW_ITEM_TYPE_VLAN:
> > >> +            vlan_spec = item->spec;
> > >> +            vlan_mask = item->mask;
> > >> +            if (vlan_spec && vlan_mask) {
> > >> +                key->vlan_tci  = vlan_spec->tci;
> > >> +                key_mask->vlan_tci = vlan_mask->tci;
> > >> +            }
> > > 
> > >  In my opinion, The values of 'spec' and 'mask' will not be null.
> > >  If the user does not set 'spec' and 'mask', the passed-in values will be set to 00 and ff by default,
> > >  which is ensured by the upper-layer interface of dpdk.
> 
> > Wait a minute.. does this mean that if the user passes, say, ETH / IPV4 / UDP
> > pattern and the 'spec' and 'mask' of ETH are both 'null', the actual key/mask
> > values in the HW rule will be, say, for the EtherType, '0000' and 'ffff'?
> > Is this correct? And which part of DPDK interface envisages that?
> 
> > Again, may be it's just my misunderstanding.
> 
>  Sorry, I misunderstood and caused you inconvenience.
>  If the user does not set 'spec' and 'mask', we will set 'spec' '0000' and mask 'ffff' write fd table to HW,
>  not set by DPDK interface.
>  If the user set one of 'spec' and 'mask', we will also set 'spec' '0000' and mask 'ffff' write fd table to HW.
>  This is how we handle it.

Understood. But is this the best course of action? Say, what happens if the user
passes ETH / IPV4 / UDP pattern items, where 'spec' and 'mask' are 'null' in all
the items? Theoretically, the driver could translate this to set the key to have
EtherType 0x0800/0xffff and IP protocol to be 0x11/0xff . Or am I wrong?

Thank you.
> 
> 
>

  reply	other threads:[~2025-08-12  7:36 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-06-17  9:31 [PATCH v1 0/2] " Bingbin Chen
2025-06-17  9:32 ` [PATCH v1 1/2] net/zxdh: npsdk add flow director table ops Bingbin Chen
2025-06-17 14:07   ` Stephen Hemminger
2025-06-17 14:08   ` Stephen Hemminger
2025-06-17  9:32 ` [PATCH v1 2/2] net/zxdh: add support flow director ops Bingbin Chen
2025-06-18  7:49 ` [PATCH v2 0/2] " Bingbin Chen
2025-06-18  7:49   ` [PATCH v2 1/2] net/zxdh: npsdk add flow director table ops Bingbin Chen
2025-06-18  7:49   ` [PATCH v2 2/2] net/zxdh: add support flow director ops Bingbin Chen
2025-06-30 16:56     ` Stephen Hemminger
2025-07-02  7:34   ` [PATCH v3 0/2] " Bingbin Chen
2025-07-02  7:34     ` [PATCH v3 1/2] net/zxdh: npsdk add flow director table ops Bingbin Chen
2025-07-02  7:34     ` [PATCH v3 2/2] net/zxdh: add support flow director ops Bingbin Chen
2025-07-02 15:02       ` Stephen Hemminger
2025-08-03 17:34       ` Stephen Hemminger
2025-08-08  7:10     ` [PATCH v4 0/2] " Junlong Wang
2025-08-08  7:10       ` [PATCH v4 1/2] net/zxdh: npsdk add flow director table ops Junlong Wang
2025-08-08  7:10       ` [PATCH v4 2/2] net/zxdh: add support flow director ops Junlong Wang
2025-08-08  9:15         ` Ivan Malov
2025-08-08 16:12         ` Stephen Hemminger
2025-08-12  1:23         ` [v4,2/2] " Junlong Wang
2025-08-12  4:04           ` Ivan Malov
2025-08-12  7:19         ` Junlong Wang
2025-08-12  7:36           ` Ivan Malov [this message]
2025-08-12 10:47         ` Junlong Wang

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