RE: [v1 3/4] app/testpmd: add gre_option item command

[Ori Kam <orika@nvidia.com>]

Hi Sean,


> -----Original Message-----
> From: Sean Zhang (Networking SW) <xiazhang@nvidia.com>
> Sent: Wednesday, January 26, 2022 10:44 AM
> Subject: [v1 3/4] app/testpmd: add gre_option item command
> 
> Add gre_option command for matching optional fields(checksum/key/sequence)
> in GRE header. The item must follow gre item, and the item does not
> change the flags in gre item, the application should set the flags in
> gre item correspondingly.
> Application can still use gre_key item 'gre_key value is xx' for key
> matching, the effect is the same with using 'gre_option key is xx'.
> 
> The examples for gre_option are as follows:
> 
> To match on checksum field with value 0x11:
> testpmd> ... pattern / eth / gre c_bit is 1 / gre_option checksum is
> 		0x11 / end ..
> 
> To match on checksum field with value 0x11 and any value of key:
> testpmd> ... pattern / eth / gre c_bit is 1 k_bit is 1 / gre_option
> 		checksum is 0x11 / end ..
> 
> To match on checksum field with value 0x11 and no key field in packet:
> testpmd> ... pattern / eth / gre c_bit is 1 k_bit is 0 / gre_option
> 		checksum is 0x11 / end ..
> 
> The invalid patterns for gre_option are as follows:
> 
> testpmd> ... pattern / eth / gre / gre_option checksum is 0x11 / end ..
> 		(c_bit in gre item not present)
> testpmd> ... pattern / eth / gre c_bit is 0 / gre_option checksum is 0x11 /
> 		end .. (c_bit is unset for gre item, but checksum is
> 		specified by gre_option item)
> 
> Signed-off-by: Sean Zhang <xiazhang@nvidia.com>
> ---
>  app/test-pmd/cmdline_flow.c                 | 59 +++++++++++++++++++++++++++++
>  doc/guides/testpmd_app_ug/testpmd_funcs.rst |  6 +++
>  2 files changed, 65 insertions(+)
> 
> diff --git a/app/test-pmd/cmdline_flow.c b/app/test-pmd/cmdline_flow.c
> index 5c2bba4..b7aacac 100644
> --- a/app/test-pmd/cmdline_flow.c
> +++ b/app/test-pmd/cmdline_flow.c
> @@ -271,6 +271,10 @@ enum index {
>  	ITEM_META_DATA,
>  	ITEM_GRE_KEY,
>  	ITEM_GRE_KEY_VALUE,
> +	ITEM_GRE_OPTION,
> +	ITEM_GRE_OPTION_CHECKSUM,
> +	ITEM_GRE_OPTION_KEY,
> +	ITEM_GRE_OPTION_SEQUENCE,
>  	ITEM_GTP_PSC,
>  	ITEM_GTP_PSC_QFI,
>  	ITEM_GTP_PSC_PDU_T,
> @@ -1042,6 +1046,7 @@ struct parse_action_priv {
>  	ITEM_ICMP6_ND_OPT_TLA_ETH,
>  	ITEM_META,
>  	ITEM_GRE_KEY,
> +	ITEM_GRE_OPTION,
>  	ITEM_GTP_PSC,
>  	ITEM_PPPOES,
>  	ITEM_PPPOED,
> @@ -1232,6 +1237,14 @@ struct parse_action_priv {
>  	ZERO,
>  };
> 
> +static const enum index item_gre_option[] = {
> +	ITEM_GRE_OPTION_CHECKSUM,
> +	ITEM_GRE_OPTION_KEY,
> +	ITEM_GRE_OPTION_SEQUENCE,
> +	ITEM_NEXT,
> +	ZERO,
> +};
> +
>  static const enum index item_gtp[] = {
>  	ITEM_GTP_FLAGS,
>  	ITEM_GTP_MSG_TYPE,
> @@ -3479,6 +3492,38 @@ static int comp_set_modify_field_id(struct context *, const struct token *,
>  			     item_param),
>  		.args = ARGS(ARG_ENTRY_HTON(rte_be32_t)),
>  	},
> +	[ITEM_GRE_OPTION] = {
> +		.name = "gre_option",
> +		.help = "match GRE optional fields",
> +		.priv = PRIV_ITEM(GRE_OPTION,
> +				  sizeof(struct rte_flow_item_gre_opt)),
> +		.next = NEXT(item_gre_option),
> +		.call = parse_vc,
> +	},
> +	[ITEM_GRE_OPTION_CHECKSUM] = {
> +		.name = "checksum",
> +		.help = "match GRE checksum",
> +		.next = NEXT(item_gre_option, NEXT_ENTRY(COMMON_UNSIGNED),
> +			     item_param),
> +		.args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_gre_opt,
> +					     checksum)),
> +	},
> +	[ITEM_GRE_OPTION_KEY] = {
> +		.name = "key",
> +		.help = "match GRE key",
> +		.next = NEXT(item_gre_option, NEXT_ENTRY(COMMON_UNSIGNED),
> +			     item_param),
> +		.args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_gre_opt,
> +					     key)),
> +	},
> +	[ITEM_GRE_OPTION_SEQUENCE] = {
> +		.name = "sequence",
> +		.help = "match GRE sequence",
> +		.next = NEXT(item_gre_option, NEXT_ENTRY(COMMON_UNSIGNED),
> +			     item_param),
> +		.args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_gre_opt,
> +					     sequence)),
> +	},
>  	[ITEM_GTP_PSC] = {
>  		.name = "gtp_psc",
>  		.help = "match GTP extension header with type 0x85",
> @@ -9235,6 +9280,20 @@ static int comp_set_modify_field_id(struct context *, const struct token *,
>  				((const struct rte_flow_item_flex *)
>  				item->spec)->length : 0;
>  			break;
> +		case RTE_FLOW_ITEM_TYPE_GRE_OPTION:
> +			size = 0;
> +			if (item->spec) {
> +				const struct rte_flow_item_gre_opt
> +					*opt = item->spec;
> +				if (opt->checksum.checksum)
> +					size += 4;
> +				if (opt->key.key)
> +					size += 4;
> +				if (opt->sequence.sequence)
> +					size += 4;
> +			}
> +			proto = 0x2F;
> +			break;
>  		default:
>  			fprintf(stderr, "Error - Not supported item\n");
>  			goto error;
> diff --git a/doc/guides/testpmd_app_ug/testpmd_funcs.rst
> b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
> index 94792d8..751503e 100644
> --- a/doc/guides/testpmd_app_ug/testpmd_funcs.rst
> +++ b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
> @@ -3714,6 +3714,12 @@ This section lists supported pattern items and their attributes, if any.
> 
>    - ``value {unsigned}``: key value.
> 
> +- ``gre_option``: match GRE optional fields(checksum/key/sequence).
> +
> +  - ``checksum {unsigned}``: checksum value.
> +  - ``key {unsigned}``: key value.
> +  - ``sequence {unsigned}``: sequence number value.
> +
>  - ``fuzzy``: fuzzy pattern match, expect faster than default.
> 
>    - ``thresh {unsigned}``: accuracy threshold.
> --
> 1.8.3.1

Acked-by: Ori Kam <orika@nvidia.com>
Best,
Ori