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net: sched: include mpls actions in hardware intermediate representation

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A recent addition to TC actions is the ability to manipulate the MPLS
headers on packets.

In preparation to offload such actions to hardware, update the IR code to
accept and prepare the new actions.

Note that no driver currently impliments the MPLS dec_ttl action so this
is not included.

Signed-off-by: John Hurley <john.hurley@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
John Hurley 2019-07-23 15:33:59 +01:00 committed by David S. Miller
parent 658688ce6c
commit 6749d59016
3 changed files with 119 additions and 0 deletions
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19
include/net/flow_offload.h
View File

@ -131,6 +131,9 @@ enum flow_action_id {
FLOW_ACTION_SAMPLE,
FLOW_ACTION_POLICE,
FLOW_ACTION_CT,
FLOW_ACTION_MPLS_PUSH,
FLOW_ACTION_MPLS_POP,
FLOW_ACTION_MPLS_MANGLE,
};
/* This is mirroring enum pedit_header_type definition for easy mapping between
@ -184,6 +187,22 @@ struct flow_action_entry {
int action;
u16 zone;
} ct;
struct { /* FLOW_ACTION_MPLS_PUSH */
u32 label;
__be16 proto;
u8 tc;
u8 bos;
u8 ttl;
} mpls_push;
struct { /* FLOW_ACTION_MPLS_POP */
__be16 proto;
} mpls_pop;
struct { /* FLOW_ACTION_MPLS_MANGLE */
u32 label;
u8 tc;
u8 bos;
u8 ttl;
} mpls_mangle;
};
};

75
include/net/tc_act/tc_mpls.h
View File

@ -27,4 +27,79 @@ struct tcf_mpls {
};
#define to_mpls(a) ((struct tcf_mpls *)a)
static inline bool is_tcf_mpls(const struct tc_action *a)
{
#ifdef CONFIG_NET_CLS_ACT
if (a->ops && a->ops->id == TCA_ID_MPLS)
return true;
#endif
return false;
}
static inline u32 tcf_mpls_action(const struct tc_action *a)
{
u32 tcfm_action;
rcu_read_lock();
tcfm_action = rcu_dereference(to_mpls(a)->mpls_p)->tcfm_action;
rcu_read_unlock();
return tcfm_action;
}
static inline __be16 tcf_mpls_proto(const struct tc_action *a)
{
__be16 tcfm_proto;
rcu_read_lock();
tcfm_proto = rcu_dereference(to_mpls(a)->mpls_p)->tcfm_proto;
rcu_read_unlock();
return tcfm_proto;
}
static inline u32 tcf_mpls_label(const struct tc_action *a)
{
u32 tcfm_label;
rcu_read_lock();
tcfm_label = rcu_dereference(to_mpls(a)->mpls_p)->tcfm_label;
rcu_read_unlock();
return tcfm_label;
}
static inline u8 tcf_mpls_tc(const struct tc_action *a)
{
u8 tcfm_tc;
rcu_read_lock();
tcfm_tc = rcu_dereference(to_mpls(a)->mpls_p)->tcfm_tc;
rcu_read_unlock();
return tcfm_tc;
}
static inline u8 tcf_mpls_bos(const struct tc_action *a)
{
u8 tcfm_bos;
rcu_read_lock();
tcfm_bos = rcu_dereference(to_mpls(a)->mpls_p)->tcfm_bos;
rcu_read_unlock();
return tcfm_bos;
}
static inline u8 tcf_mpls_ttl(const struct tc_action *a)
{
u8 tcfm_ttl;
rcu_read_lock();
tcfm_ttl = rcu_dereference(to_mpls(a)->mpls_p)->tcfm_ttl;
rcu_read_unlock();
return tcfm_ttl;
}
#endif /* __NET_TC_MPLS_H */

25
net/sched/cls_api.c
View File

@ -36,6 +36,7 @@
#include <net/tc_act/tc_sample.h>
#include <net/tc_act/tc_skbedit.h>
#include <net/tc_act/tc_ct.h>
#include <net/tc_act/tc_mpls.h>
extern const struct nla_policy rtm_tca_policy[TCA_MAX + 1];
@ -3269,6 +3270,30 @@ int tc_setup_flow_action(struct flow_action *flow_action,
entry->id = FLOW_ACTION_CT;
entry->ct.action = tcf_ct_action(act);
entry->ct.zone = tcf_ct_zone(act);
} else if (is_tcf_mpls(act)) {
switch (tcf_mpls_action(act)) {
case TCA_MPLS_ACT_PUSH:
entry->id = FLOW_ACTION_MPLS_PUSH;
entry->mpls_push.proto = tcf_mpls_proto(act);
entry->mpls_push.label = tcf_mpls_label(act);
entry->mpls_push.tc = tcf_mpls_tc(act);
entry->mpls_push.bos = tcf_mpls_bos(act);
entry->mpls_push.ttl = tcf_mpls_ttl(act);
break;
case TCA_MPLS_ACT_POP:
entry->id = FLOW_ACTION_MPLS_POP;
entry->mpls_pop.proto = tcf_mpls_proto(act);
break;
case TCA_MPLS_ACT_MODIFY:
entry->id = FLOW_ACTION_MPLS_MANGLE;
entry->mpls_mangle.label = tcf_mpls_label(act);
entry->mpls_mangle.tc = tcf_mpls_tc(act);
entry->mpls_mangle.bos = tcf_mpls_bos(act);
entry->mpls_mangle.ttl = tcf_mpls_ttl(act);
break;
default:
goto err_out;
}
} else {
goto err_out;
}