Re: [dpdk-dev] [PATCH v3 1/2] ethdev: add new ext hdr for gtp psc

[Raslan Darawsheh <rasland@nvidia.com>]

> -----Original Message-----
> From: Ferruh Yigit <ferruh.yigit@intel.com>
> Sent: Thursday, April 1, 2021 7:51 PM
> To: Raslan Darawsheh <rasland@nvidia.com>; dev@dpdk.org
> Cc: Ori Kam <orika@nvidia.com>; andrew.rybchenko@oktetlabs.ru;
> ivan.malov@oktetlabs.ru; ying.a.wang@intel.com; olivier.matz@6wind.com;
> Slava Ovsiienko <viacheslavo@nvidia.com>; Shiri Kuzin <shirik@nvidia.com>
> Subject: Re: [PATCH v3 1/2] ethdev: add new ext hdr for gtp psc
> 
> On 3/30/2021 9:00 AM, Raslan Darawsheh wrote:
> > Define new rte header for gtp PDU session container
> > based on RFC 38415-g30
> >
> > Signed-off-by: Raslan Darawsheh <rasland@nvidia.com>
> > ---
> >   lib/librte_net/rte_gtp.h | 34 ++++++++++++++++++++++++++++++++++
> >   1 file changed, 34 insertions(+)
> >
> > diff --git a/lib/librte_net/rte_gtp.h b/lib/librte_net/rte_gtp.h
> > index 6a6f9b238d..bfaae26535 100644
> > --- a/lib/librte_net/rte_gtp.h
> > +++ b/lib/librte_net/rte_gtp.h
> > @@ -61,6 +61,40 @@ struct rte_gtp_hdr_ext_word {
> >   	uint8_t next_ext;     /**< Next Extension Header Type. */
> >   }  __rte_packed;
> >
> > +/**
> > + * Optional extension for GTP with next_ext set to 0x85
> > + * defined based on RFC 38415-g30.
> > + */
> > +__extension__
> > +struct rte_gtp_psc {
> 
> general consensus in other protocols seems having '_hdr' suffix in the struct
> name, I can see this is extension but do you think does it make to add suffix?
Yes sure, will send in a new version.
> 
> > +	uint8_t ext_hdr_len; /**< PDU ext hdr len in multiples of 4 bytes */
> > +	uint8_t type:4; /**< PDU type */
> > +	uint8_t qmp:1; /**< Qos Monitoring Packet */
> > +	union {
> > +		struct {
> > +			uint8_t snp:1; /**< Sequence number presence */
> > +			uint8_t spare_dl1:2; /**< spare down link bits */
> > +		};
> > +		struct {
> > +			uint8_t dl_delay_ind:1; /**< dl delay result presence
> */
> > +			uint8_t ul_delay_ind:1; /**< ul delay result presence
> */
> > +			uint8_t snp_ul1:1; /**< Sequence number presence
> ul */
> > +		};
> > +	};
> > +	union {
> > +		struct {
> > +			uint8_t ppp:1; /**< Paging policy presence */
> > +			uint8_t rqi:1; /**< Reflective Qos Indicator */
> > +		};
> > +		struct {
> > +			uint8_t n_delay_ind:1; /**< N3/N9 delay result
> presence */
> > +			uint8_t spare_ul2:1; /**< spare up link bits */
> > +		};
> > +	};
> > +	uint8_t qfi:6; /**< Qos Flow Identifier */
> > +	uint8_t data[0]; /**< data feilds */
> > +} __rte_packed;
> > +
> >   /** GTP header length */
> >   #define RTE_ETHER_GTP_HLEN \
> >   	(sizeof(struct rte_udp_hdr) + sizeof(struct rte_gtp_hdr))
> >

Kindest regards
Raslan Darawsheh