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From: Ferruh Yigit <ferruh.yigit@intel.com>
To: Raslan Darawsheh <rasland@nvidia.com>,
	Olivier Matz <olivier.matz@6wind.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>, Ori Kam <orika@nvidia.com>,
	"andrew.rybchenko@oktetlabs.ru" <andrew.rybchenko@oktetlabs.ru>,
	"ivan.malov@oktetlabs.ru" <ivan.malov@oktetlabs.ru>,
	"ying.a.wang@intel.com" <ying.a.wang@intel.com>,
	Slava Ovsiienko <viacheslavo@nvidia.com>,
	Shiri Kuzin <shirik@nvidia.com>
Subject: Re: [dpdk-dev] [PATCH v4 1/2] ethdev: add new ext hdr for gtp psc
Date: Thu, 8 Apr 2021 15:10:26 +0100
Message-ID: <65a77b53-03fa-3989-c688-60324552aabd@intel.com> (raw)
In-Reply-To: <DM6PR12MB2748875A91FFD2F5CE464ECCCF749@DM6PR12MB2748.namprd12.prod.outlook.com>

On 4/8/2021 1:37 PM, Raslan Darawsheh wrote:
> Hi Olivier,
> 
>> -----Original Message-----
>> From: Olivier Matz <olivier.matz@6wind.com>
>> Sent: Thursday, April 8, 2021 3:30 PM
>> To: Raslan Darawsheh <rasland@nvidia.com>
>> Cc: dev@dpdk.org; ferruh.yigit@intel.com; Ori Kam <orika@nvidia.com>;
>> andrew.rybchenko@oktetlabs.ru; ivan.malov@oktetlabs.ru;
>> ying.a.wang@intel.com; Slava Ovsiienko <viacheslavo@nvidia.com>; Shiri
>> Kuzin <shirik@nvidia.com>
>> Subject: Re: [PATCH v4 1/2] ethdev: add new ext hdr for gtp psc
>>
>> Hi Raslan,
>>
>> On Sun, Apr 04, 2021 at 10:45:51AM +0300, Raslan Darawsheh wrote:
>>> Define new rte header for gtp PDU session container
>>> based on RFC 38415-g30
>>
>> Do you have a link to this RFC?
> Yes sure,
> https://www.3gpp.org/ftp/Specs/archive/38_series/38.415/38415-g30.zip
> 
>>
>>> 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..088b0b5a53 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_hdr {
>>> +	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;
>>
>> With this header, sizeof(rte_gtp_psc_hdr) = 5, is it really expected?
> The data[0] is variable length data, I guess I should send another version to mention that in the comment maybe.
> The header size according to the spec should be 4 octets aligned in general.

The struct is 5 btyes, this is not related to data[0], please check the pahole 
output:
http://inbox.dpdk.org/dev/536631b9-c634-ddac-c154-91978ffc29a5@intel.com/

>>
>> It would help to see the specification to have a better idea of how to
> Sure, I've just posted the link above, please let me know of any suggestion that you have, and I'll be glad to do accordingly.
> 
>> split, but a possible solution is to do something like this:
>>
>> struct rte_gtp_psc_generic_hdr {
>> 	uint8_t ext_hdr_len;
>> 	uint8_t type:4
>> 	uint8_t qmp:1;
>> 	uint8_t pad:3;
>> };
>>
>> struct rte_gtp_psc_<name1>_hdr {
>> 	uint8_t ext_hdr_len;
>> 	uint8_t type:4
>> 	uint8_t qmp:1;
>> 	uint8_t uint8_t snp:1;
>> 	uint8_t spare_dl1:2;
>> 	...
>> };
>>
>> ...
>>
>> struct rte_gtp_psc_hdr {
>> 	union {
>> 		struct rte_gtp_psc_generic_hdr generic;
>> 		struct rte_gtp_psc_<name1>_hdr <name1>;
>> 		struct rte_gtp_psc_<name2>_hdr <name2>;
>> 	};
>> };
>>
>> Also, you need to take care about endianness.
>>
>>
>> Regards,
>> Olivier
> Kindest regards
> Raslan Darawsheh
> 


  reply	other threads:[~2021-04-08 14:10 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-23 12:11 [dpdk-dev] [PATCH] ethdev: update qfi definition Raslan Darawsheh
2021-03-26 13:12 ` Ferruh Yigit
2021-03-29  8:53   ` Ori Kam
2021-03-29  9:06     ` Raslan Darawsheh
2021-03-29 11:14       ` Ferruh Yigit
2021-03-30  7:50 ` [dpdk-dev] [PATCH v2 0/2] fix gtp psc qfi support Raslan Darawsheh
2021-03-30  7:50   ` [dpdk-dev] [PATCH v2 1/2] ethdev: add new ext hdr for gtp psc Raslan Darawsheh
2021-03-30  8:00     ` [dpdk-dev] [PATCH v3 0/2] fix gtp psc qfi support Raslan Darawsheh
2021-03-30  8:00       ` [dpdk-dev] [PATCH v3 1/2] ethdev: add new ext hdr for gtp psc Raslan Darawsheh
2021-04-01 16:51         ` Ferruh Yigit
2021-04-04  7:17           ` Raslan Darawsheh
2021-03-30  8:00       ` [dpdk-dev] [PATCH v3 2/2] ethdev: update qfi definition Raslan Darawsheh
2021-04-01 16:54         ` Ferruh Yigit
2021-04-04  7:18           ` Raslan Darawsheh
2021-04-04  7:45     ` [dpdk-dev] [PATCH v4 0/2] fix gtp psc qfi support Raslan Darawsheh
2021-04-04  7:45       ` [dpdk-dev] [PATCH v4 1/2] ethdev: add new ext hdr for gtp psc Raslan Darawsheh
2021-04-08 12:29         ` Olivier Matz
2021-04-08 12:37           ` Raslan Darawsheh
2021-04-08 14:10             ` Ferruh Yigit [this message]
2021-04-08 14:10             ` Olivier Matz
2021-04-13  7:45               ` Raslan Darawsheh
2021-04-29 16:29           ` Tyler Retzlaff
2021-06-08 12:13             ` Andrew Rybchenko
2021-04-04  7:45       ` [dpdk-dev] [PATCH v4 2/2] ethdev: update qfi definition Raslan Darawsheh
2021-04-06 16:09         ` Ferruh Yigit
2021-04-13  8:14           ` Raslan Darawsheh
2021-04-13  9:24             ` Ori Kam
2021-04-14 12:16               ` Ferruh Yigit
2021-04-15  6:33                 ` Raslan Darawsheh
2021-04-29  8:10       ` [dpdk-dev] [PATCH v5 0/1] add new hdr for gtp qfi Raslan Darawsheh
2021-04-29  8:10         ` [dpdk-dev] [PATCH v5 1/1] ethdev: add new ext hdr for gtp psc Raslan Darawsheh
2021-05-11 11:46           ` Ferruh Yigit
2021-06-08 12:17           ` Andrew Rybchenko
2021-06-08 12:18             ` Andrew Rybchenko
2021-06-08 14:07               ` Raslan Darawsheh
2021-03-30  7:50   ` [dpdk-dev] [PATCH v2 2/2] ethdev: update qfi definition Raslan Darawsheh
2021-04-14 12:40 ` [dpdk-dev] [PATCH] " Ferruh Yigit

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