[PATCH net-next v2 1/2] net: flow_offload: add tc police action parameters

Jianbo Liu
2022-02-17T08:29:01Z

The current police offload action entry is missing exceed/notexceed
actions and parameters that can be configured by tc police action.
Add the missing parameters as a pre-step for offloading police actions
to hardware.

Signed-off-by: Jianbo Liu <jianbol@nvidia.com>
Signed-off-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
---
include/net/flow_offload.h | 13 ++++++++++
include/net/tc_act/tc_police.h | 30 ++++++++++++++++++++++
net/sched/act_police.c | 46 ++++++++++++++++++++++++++++++++++
3 files changed, 89 insertions(+)

diff --git a/include/net/flow_offload.h b/include/net/flow_offload.h
index 5b8c54eb7a6b..94cde6bbc8a5 100644
--- a/include/net/flow_offload.h
+++ b/include/net/flow_offload.h
@@ -148,6 +148,8 @@ enum flow_action_id {
FLOW_ACTION_MPLS_MANGLE,
FLOW_ACTION_GATE,
FLOW_ACTION_PPPOE_PUSH,
+ FLOW_ACTION_JUMP,
+ FLOW_ACTION_PIPE,
NUM_FLOW_ACTIONS,
};

@@ -235,9 +237,20 @@ struct flow_action_entry {
struct { /* FLOW_ACTION_POLICE */
u32 burst;
u64 rate_bytes_ps;
+ u64 peakrate_bytes_ps;
+ u32 avrate;
+ u16 overhead;
u64 burst_pkt;
u64 rate_pkt_ps;
u32 mtu;
+ struct {
+ enum flow_action_id act_id;
+ u32 index;
+ } exceed;
+ struct {
+ enum flow_action_id act_id;
+ u32 index;
+ } notexceed;
} police;
struct { /* FLOW_ACTION_CT */
int action;
diff --git a/include/net/tc_act/tc_police.h b/include/net/tc_act/tc_police.h
index 72649512dcdd..283bde711a42 100644
--- a/include/net/tc_act/tc_police.h
+++ b/include/net/tc_act/tc_police.h
@@ -159,4 +159,34 @@ static inline u32 tcf_police_tcfp_mtu(const struct tc_action *act)
return params->tcfp_mtu;
}

+static inline u64 tcf_police_peakrate_bytes_ps(const struct tc_action *act)
+{
+ struct tcf_police *police = to_police(act);
+ struct tcf_police_params *params;
+
+ params = rcu_dereference_protected(police->params,
+ lockdep_is_held(&police->tcf_lock));
+ return params->peak.rate_bytes_ps;
+}
+
+static inline u32 tcf_police_tcfp_ewma_rate(const struct tc_action *act)
+{
+ struct tcf_police *police = to_police(act);
+ struct tcf_police_params *params;
+
+ params = rcu_dereference_protected(police->params,
+ lockdep_is_held(&police->tcf_lock));
+ return params->tcfp_ewma_rate;
+}
+
+static inline u16 tcf_police_rate_overhead(const struct tc_action *act)
+{
+ struct tcf_police *police = to_police(act);
+ struct tcf_police_params *params;
+
+ params = rcu_dereference_protected(police->params,
+ lockdep_is_held(&police->tcf_lock));
+ return params->rate.overhead;
+}
+
#endif /* __NET_TC_POLICE_H */
diff --git a/net/sched/act_police.c b/net/sched/act_police.c
index 0923aa2b8f8a..0457b6c9c4e7 100644
--- a/net/sched/act_police.c
+++ b/net/sched/act_police.c
@@ -405,20 +405,66 @@ static int tcf_police_search(struct net *net, struct tc_action **a, u32 index)
return tcf_idr_search(tn, a, index);
}

+static int tcf_police_act_to_flow_act(int tc_act, int *index)
+{
+ int act_id = -EOPNOTSUPP;
+
+ if (!TC_ACT_EXT_OPCODE(tc_act)) {
+ if (tc_act == TC_ACT_OK)
+ act_id = FLOW_ACTION_ACCEPT;
+ else if (tc_act == TC_ACT_SHOT)
+ act_id = FLOW_ACTION_DROP;
+ else if (tc_act == TC_ACT_PIPE)
+ act_id = FLOW_ACTION_PIPE;
+ } else if (TC_ACT_EXT_CMP(tc_act, TC_ACT_GOTO_CHAIN)) {
+ act_id = FLOW_ACTION_GOTO;
+ *index = tc_act & TC_ACT_EXT_VAL_MASK;
+ } else if (TC_ACT_EXT_CMP(tc_act, TC_ACT_JUMP)) {
+ act_id = FLOW_ACTION_JUMP;
+ *index = tc_act & TC_ACT_EXT_VAL_MASK;
+ }
+
+ return act_id;
+}
+
static int tcf_police_offload_act_setup(struct tc_action *act, void *entry_data,
u32 *index_inc, bool bind)
{
if (bind) {
struct flow_action_entry *entry = entry_data;
+ struct tcf_police *police = to_police(act);
+ struct tcf_police_params *p;
+ int act_id;
+
+ p = rcu_dereference_protected(police->params,
+ lockdep_is_held(&police->tcf_lock));

entry->id = FLOW_ACTION_POLICE;
entry->police.burst = tcf_police_burst(act);
entry->police.rate_bytes_ps =
tcf_police_rate_bytes_ps(act);
+ entry->police.peakrate_bytes_ps = tcf_police_peakrate_bytes_ps(act);
+ entry->police.avrate = tcf_police_tcfp_ewma_rate(act);
+ entry->police.overhead = tcf_police_rate_overhead(act);
entry->police.burst_pkt = tcf_police_burst_pkt(act);
entry->police.rate_pkt_ps =
tcf_police_rate_pkt_ps(act);
entry->police.mtu = tcf_police_tcfp_mtu(act);
+
+ act_id = tcf_police_act_to_flow_act(police->tcf_action,
+ &entry->police.exceed.index);
+ if (act_id < 0)
+ return act_id;
+
+ entry->police.exceed.act_id = act_id;
+
+ act_id = tcf_police_act_to_flow_act(p->tcfp_result,
+ &entry->police.notexceed.index);
+ if (act_id < 0)
+ return act_id;
+
+ entry->police.notexceed.act_id = act_id;
+
*index_inc = 1;
} else {
struct flow_offload_action *fl_action = entry_data;
--
2.26.2