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charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable BR Rongwei ________________________________ From: Thomas Monjalon Sent: Wednesday, June 5, 2024 2:37 To: rongwei liu ; Dariusz Sosnowski Cc: dev@dpdk.org ; Matan Azrad ; Slava Ovsi= ienko ; Ori Kam ; Suanming Mou ; Aman Singh ; Yuying Zhang = ; Ferruh Yigit ; Andrew Rybch= enko Subject: Re: [PATCH v4 2/3] ethdev: add VXLAN last reserved field External email: Use caution opening links or attachments 04/06/2024 18:40, Dariusz Sosnowski: > > > 04/06/2024 14:38, Rongwei Liu: > > > > --- a/app/test-pmd/cmdline_flow.c > > > > +++ b/app/test-pmd/cmdline_flow.c > > > > @@ -1006,6 +1006,7 @@ static const char *const flow_field_ids[] =3D= { > > > > "ipv6_flow_label", "ipv6_traffic_class", > > > > "esp_spi", "esp_seq_num", "esp_proto", > > > > "random", > > > > + "vxlan_last_rsvd", > > > > NULL > > > > }; > > > > > > How vxlan_last_rsvd is linked to RTE_FLOW_FIELD_VXLAN_RSVD1 in testpm= d? > > > Just because it is the same order? > > Yes, it's because of the order. > We should refactor this to use array designators. > > > > > --- a/lib/ethdev/rte_flow.h > > > > +++ b/lib/ethdev/rte_flow.h > > > > @@ -2428,6 +2428,7 @@ enum rte_flow_field_id { > > > > RTE_FLOW_FIELD_ESP_SEQ_NUM, /**< ESP Sequence Number. */ > > > > RTE_FLOW_FIELD_ESP_PROTO, /**< ESP next protocol value.= */ > > > > RTE_FLOW_FIELD_RANDOM, /**< Random value. */ > > > > + RTE_FLOW_FIELD_VXLAN_RSVD1, /**< VXLAN last reserved byte= . */ > > > > }; > > > > > > I think we should use the same naming as in testpmd. > > > What about RTE_FLOW_FIELD_VXLAN_LAST_RSVD? > > To be honest, no strong objection per my personal thought. Considering= the API "vxlan_hdr" names this field as "uint8_t rsvd1", maybe RTE_FLOW_FI= ELD_VXLAN_RSVD1 will be clearer for user as 1 vs 1 mapping? > > +1 on using RSVD1 so it matches rte_vxlan_hdr definition. > > In this patch, "vxlan_last_rsvd" is used in testpmd, so it matches existi= ng "last_rsvd" field in VXLAN item. > If we choose to use "rsvd1", we should probably rename all other instance= s of "last_rsvd" to match. I prefer "vxlan_last_rsvd" for 2 reasons: - it is more meaningful - we are adding first, second and third reserved fields to match th= e 3 bytes of rsvd0 (patch to come) Sound clear and reasonable. I would like to propose the alignment between r= te_flow_field_id and rte_vxlan_hdr: 1. RTE_FLOW_FIELD_VXLAN_RSVD1 ---> RTE_FLOW_FIELD_VXLAN_LAST_RSVD 2. "uint8_t rsvd1" ----> "uint8_t last_rsvd" --_000_CH3PR12MB82094DC38A35BD12C7FFD2EBABF92CH3PR12MB8209namp_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable


BR

Rongwei

 


From: Thomas= Monjalon <thomas@monjalon.net>
Sent: Wednesday, June 5, 2024 2:37
To: rongwei liu <rongweil@nvidia.com>; Dariusz Sosnowski = <dsosnowski@nvidia.com>
Cc: dev@dpdk.org <dev@dpdk.org>; Matan Azrad <matan@nv= idia.com>; Slava Ovsiienko <viacheslavo@nvidia.com>; Ori Kam <o= rika@nvidia.com>; Suanming Mou <suanmingm@nvidia.com>; Aman Singh = <aman.deep.singh@intel.com>; Yuying Zhang <yuying.zhang@intel.com&= gt;; Ferruh Yigit <ferruh.yigit@amd.com>; Andrew Rybchenko <andrew.ryb= chenko@oktetlabs.ru>
Subject: Re: [PATCH v4 2/3] ethdev: add VXLAN last reserved fie= ld
 
External email: Us= e caution opening links or attachments


04/06/2024 18:40, Dariusz Sosnowski:
> > > 04/06/2024 14:38, Rongwei Liu:
> > > > --- a/app/test-pmd/cmdline_flow.c
> > > > +++ b/app/test-pmd/cmdline_flow.c
> > > > @@ -1006,6 +1006,7 @@ static const char *const flow_fie= ld_ids[] =3D {
> > > >       "ipv6_flow_lab= el", "ipv6_traffic_class",
> > > >       "esp_spi"= , "esp_seq_num", "esp_proto",
> > > >       "random",=
> > > > +     "vxlan_last_rsvd",<= br> > > > >       NULL
> > > >  };
> > >
> > > How vxlan_last_rsvd is linked to RTE_FLOW_FIELD_VXLAN_RSVD1 = in testpmd?
> > > Just because it is the same order?
>
> Yes, it's because of the order.
> We should refactor this to use array designators.
>
> > > > --- a/lib/ethdev/rte_flow.h
> > > > +++ b/lib/ethdev/rte_flow.h
> > > > @@ -2428,6 +2428,7 @@ enum rte_flow_field_id {
> > > >       RTE_FLOW_FIELD_ESP_= SEQ_NUM,     /**< ESP Sequence Number. */
> > > >       RTE_FLOW_FIELD_ESP_= PROTO,       /**< ESP next protocol value.= */
> > > >       RTE_FLOW_FIELD_RAND= OM,          /**< Random va= lue. */
> > > > +     RTE_FLOW_FIELD_VXLAN_RSVD1,&n= bsp;    /**< VXLAN last reserved byte. */
> > > >  };
> > >
> > > I think we should use the same naming as in testpmd.
> > > What about RTE_FLOW_FIELD_VXLAN_LAST_RSVD?
> > To be honest, no strong objection per my personal thought.  = Considering the API "vxlan_hdr" names this field as "uint8_t= rsvd1", maybe RTE_FLOW_FIELD_VXLAN_RSVD1 will be clearer for user as = 1 vs 1 mapping?
>
> +1 on using RSVD1 so it matches rte_vxlan_hdr definition.
>
> In this patch, "vxlan_last_rsvd" is used in testpmd, so it m= atches existing "last_rsvd" field in VXLAN item.
> If we choose to use "rsvd1", we should probably rename all o= ther instances of "last_rsvd" to match.

I prefer "vxlan_last_rsvd" for 2 reasons:
        - it is more meaningful
        - we are adding first, second an= d third reserved fields to match the 3 bytes of rsvd0 (patch to come)

Sound clear and re= asonable. I would like to propose the alignment between rte_flow_field_id a= nd rte_vxlan_hdr:
  1. RTE_FLOW_FIELD_VXLAN_RSVD1  ---> RTE_FLOW_FIELD_VXLAN_LAST_RSVD
  2. "uint8_t rsvd1"  ---->  "uint8_t last_rsvd"= ; 



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