[Intel-wired-lan] [RFC PATCH net-next 3/5] net/sched: flower: Add L2TPv3 filter
Wojciech Drewek
wojciech.drewek at intel.com
Fri Aug 26 11:00:57 UTC 2022
Add support for matching on L2TPv3 session ID.
Session ID can be specified only when ip proto was
set to IPPROTO_L2TP.
Example filter:
# tc filter add dev $PF1 ingress prio 1 protocol ip \
flower \
ip_proto l2tp \
l2tpv3_sid 1234 \
skip_sw \
action mirred egress redirect dev $VF1_PR
Signed-off-by: Wojciech Drewek <wojciech.drewek at intel.com>
---
include/uapi/linux/pkt_cls.h | 2 ++
net/sched/cls_flower.c | 16 ++++++++++++++++
2 files changed, 18 insertions(+)
diff --git a/include/uapi/linux/pkt_cls.h b/include/uapi/linux/pkt_cls.h
index 877309d6ca3c..648a82f32666 100644
--- a/include/uapi/linux/pkt_cls.h
+++ b/include/uapi/linux/pkt_cls.h
@@ -592,6 +592,8 @@ enum {
TCA_FLOWER_KEY_PPPOE_SID, /* be16 */
TCA_FLOWER_KEY_PPP_PROTO, /* be16 */
+ TCA_FLOWER_KEY_L2TPV3_SID, /* be32 */
+
__TCA_FLOWER_MAX,
};
diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c
index 041d63ff809a..22d32b82bc09 100644
--- a/net/sched/cls_flower.c
+++ b/net/sched/cls_flower.c
@@ -69,6 +69,7 @@ struct fl_flow_key {
struct flow_dissector_key_hash hash;
struct flow_dissector_key_num_of_vlans num_of_vlans;
struct flow_dissector_key_pppoe pppoe;
+ struct flow_dissector_key_l2tpv3 l2tpv3;
} __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
struct fl_flow_mask_range {
@@ -712,6 +713,7 @@ static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
[TCA_FLOWER_KEY_NUM_OF_VLANS] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_PPPOE_SID] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_PPP_PROTO] = { .type = NLA_U16 },
+ [TCA_FLOWER_KEY_L2TPV3_SID] = { .type = NLA_U32 },
};
@@ -1790,6 +1792,11 @@ static int fl_set_key(struct net *net, struct nlattr **tb,
fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
sizeof(key->arp.tha));
+ } else if (key->basic.ip_proto == IPPROTO_L2TP) {
+ fl_set_key_val(tb, &key->l2tpv3.session_id,
+ TCA_FLOWER_KEY_L2TPV3_SID,
+ &mask->l2tpv3.session_id, TCA_FLOWER_UNSPEC,
+ sizeof(key->l2tpv3.session_id));
}
if (key->basic.ip_proto == IPPROTO_TCP ||
@@ -1970,6 +1977,8 @@ static void fl_init_dissector(struct flow_dissector *dissector,
FLOW_DISSECTOR_KEY_NUM_OF_VLANS, num_of_vlans);
FL_KEY_SET_IF_MASKED(mask, keys, cnt,
FLOW_DISSECTOR_KEY_PPPOE, pppoe);
+ FL_KEY_SET_IF_MASKED(mask, keys, cnt,
+ FLOW_DISSECTOR_KEY_L2TPV3, l2tpv3);
skb_flow_dissector_init(dissector, keys, cnt);
}
@@ -3196,6 +3205,13 @@ static int fl_dump_key(struct sk_buff *skb, struct net *net,
mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
sizeof(key->arp.tha))))
goto nla_put_failure;
+ else if (key->basic.ip_proto == IPPROTO_L2TP &&
+ fl_dump_key_val(skb, &key->l2tpv3.session_id,
+ TCA_FLOWER_KEY_L2TPV3_SID,
+ &mask->l2tpv3.session_id,
+ TCA_FLOWER_UNSPEC,
+ sizeof(key->l2tpv3.session_id)))
+ goto nla_put_failure;
if ((key->basic.ip_proto == IPPROTO_TCP ||
key->basic.ip_proto == IPPROTO_UDP ||
--
2.31.1
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