Hi Michael,
> -----Original Message-----
> From: Michael Baum <michaelba@nvidia.com>
> Sent: Monday, September 11, 2023 10:42 AM
>
> Add support for random item, usage example:
>
> pattern random spec value 0x1 mask value 0x3 / eth / end
>
> Flow rule with above pattern matching 25% of the traffic, it hits only
> when random value suffix is "01" and miss the others ("00", "10", "11").
>
> Signed-off-by: Michael Baum <michaelba@nvidia.com>
> ---
Acked-by: Ori Kam <orika@nvidia.com>
Best,
Ori
@@ -417,6 +417,8 @@ enum index {
ITEM_ICMP6_ND_OPT_TLA_ETH_TLA,
ITEM_META,
ITEM_META_DATA,
+ ITEM_RANDOM,
+ ITEM_RANDOM_VALUE,
ITEM_GRE_KEY,
ITEM_GRE_KEY_VALUE,
ITEM_GRE_OPTION,
@@ -936,7 +938,8 @@ static const char *const modify_field_ids[] = {
"ipv6_proto",
"flex_item",
"hash_result",
- "geneve_opt_type", "geneve_opt_class", "geneve_opt_data", "mpls",
+ "geneve_opt_type", "geneve_opt_class", "geneve_opt_data",
+ "mpls", "random",
NULL
};
@@ -1535,6 +1538,7 @@ static const enum index next_item[] = {
ITEM_ICMP6_ND_OPT_SLA_ETH,
ITEM_ICMP6_ND_OPT_TLA_ETH,
ITEM_META,
+ ITEM_RANDOM,
ITEM_GRE_KEY,
ITEM_GRE_OPTION,
ITEM_GTP_PSC,
@@ -1842,6 +1846,12 @@ static const enum index item_meta[] = {
ZERO,
};
+static const enum index item_random[] = {
+ ITEM_RANDOM_VALUE,
+ ITEM_NEXT,
+ ZERO,
+};
+
static const enum index item_gtp_psc[] = {
ITEM_GTP_PSC_QFI,
ITEM_GTP_PSC_PDU_T,
@@ -5063,6 +5073,21 @@ static const struct token token_list[] = {
.args = ARGS(ARGS_ENTRY_MASK(struct rte_flow_item_meta,
data, "\xff\xff\xff\xff")),
},
+ [ITEM_RANDOM] = {
+ .name = "random",
+ .help = "match random value",
+ .priv = PRIV_ITEM(RANDOM, sizeof(struct rte_flow_item_random)),
+ .next = NEXT(item_random),
+ .call = parse_vc,
+ },
+ [ITEM_RANDOM_VALUE] = {
+ .name = "value",
+ .help = "random value",
+ .next = NEXT(item_random, NEXT_ENTRY(COMMON_UNSIGNED),
+ item_param),
+ .args = ARGS(ARGS_ENTRY_MASK(struct rte_flow_item_random,
+ value, "\xff\xff")),
+ },
[ITEM_GRE_KEY] = {
.name = "gre_key",
.help = "match GRE key",
@@ -12634,6 +12659,9 @@ flow_item_default_mask(const struct rte_flow_item *item)
case RTE_FLOW_ITEM_TYPE_META:
mask = &rte_flow_item_meta_mask;
break;
+ case RTE_FLOW_ITEM_TYPE_RANDOM:
+ mask = &rte_flow_item_random_mask;
+ break;
case RTE_FLOW_ITEM_TYPE_FUZZY:
mask = &rte_flow_item_fuzzy_mask;
break;
@@ -3724,6 +3724,10 @@ This section lists supported pattern items and their attributes, if any.
- ``data {unsigned}``: metadata value.
+- ``random``: match application specific random value.
+
+ - ``value {unsigned}``: random value.
+
- ``gtp_psc``: match GTP PDU extension header with type 0x85.
- ``pdu_type {unsigned}``: PDU type.