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net: tc_skbedit: Make the skbedit priority offloadable 

The skbedit action "priority" is used for adjusting SKB priority. Allow
drivers to offload the action by introducing two new skbedit getters and a
new flow action, and initializing appropriately in tc_setup_flow_action().

Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Petr Machata 2020-03-19 15:47:21 +02:00 committed by David S. Miller
parent fe93f0b225
commit 2ce124109c
3 changed files with 22 additions and 0 deletions
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2
include/net/flow_offload.h
View File

@ -137,6 +137,7 @@ enum flow_action_id {
FLOW_ACTION_CSUM,
FLOW_ACTION_MARK,
FLOW_ACTION_PTYPE,
FLOW_ACTION_PRIORITY,
FLOW_ACTION_WAKE,
FLOW_ACTION_QUEUE,
FLOW_ACTION_SAMPLE,
@ -211,6 +212,7 @@ struct flow_action_entry {
u32 csum_flags; /* FLOW_ACTION_CSUM */
u32 mark; /* FLOW_ACTION_MARK */
u16 ptype; /* FLOW_ACTION_PTYPE */
u32 priority; /* FLOW_ACTION_PRIORITY */
struct { /* FLOW_ACTION_QUEUE */
u32 ctx;
u32 index;

17
include/net/tc_act/tc_skbedit.h
View File

@ -77,4 +77,21 @@ static inline u32 tcf_skbedit_ptype(const struct tc_action *a)
return ptype;
}
/* Return true iff action is priority */
static inline bool is_tcf_skbedit_priority(const struct tc_action *a)
{
return is_tcf_skbedit_with_flag(a, SKBEDIT_F_PRIORITY);
}
static inline u32 tcf_skbedit_priority(const struct tc_action *a)
{
u32 priority;
rcu_read_lock();
priority = rcu_dereference(to_skbedit(a)->params)->priority;
rcu_read_unlock();
return priority;
}
#endif /* __NET_TC_SKBEDIT_H */

3
net/sched/cls_api.c
View File

@ -3665,6 +3665,9 @@ int tc_setup_flow_action(struct flow_action *flow_action,
} else if (is_tcf_skbedit_ptype(act)) {
entry->id = FLOW_ACTION_PTYPE;
entry->ptype = tcf_skbedit_ptype(act);
} else if (is_tcf_skbedit_priority(act)) {
entry->id = FLOW_ACTION_PRIORITY;
entry->priority = tcf_skbedit_priority(act);
} else {
err = -EOPNOTSUPP;
goto err_out_locked;