Enhance flower to support 802.1Q vlan protocol classification.
Currently, the supported fields are vlan_id and vlan_priority.
Example:
# add a flower filter with vlan id and priority classification
tc filter add dev ens4f0 protocol 802.1Q parent ffff: \
flower \
indev ens4f0 \
vlan_ethtype ipv4 \
vlan_id 100 \
vlan_prio 3 \
action vlan pop
Signed-off-by: Hadar Hen Zion <had...@mellanox.com>
Acked-by: Jiri Pirko <j...@mellanox.com>
---
include/uapi/linux/pkt_cls.h | 3 ++
net/sched/cls_flower.c | 70 ++++++++++++++++++++++++++++++++++++++++++--
2 files changed, 70 insertions(+), 3 deletions(-)
diff --git a/include/uapi/linux/pkt_cls.h b/include/uapi/linux/pkt_cls.h
index d1c1cca..51b5b24 100644
--- a/include/uapi/linux/pkt_cls.h
+++ b/include/uapi/linux/pkt_cls.h
@@ -428,6 +428,9 @@ enum {
TCA_FLOWER_KEY_UDP_DST, /* be16 */
TCA_FLOWER_FLAGS,
+ TCA_FLOWER_KEY_VLAN_ID,
+ TCA_FLOWER_KEY_VLAN_PRIO,
+ TCA_FLOWER_KEY_VLAN_ETH_TYPE,
__TCA_FLOWER_MAX,
};
diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c
index 0080fc0..1e11e57 100644
--- a/net/sched/cls_flower.c
+++ b/net/sched/cls_flower.c
@@ -28,6 +28,7 @@ struct fl_flow_key {
struct flow_dissector_key_control control;
struct flow_dissector_key_basic basic;
struct flow_dissector_key_eth_addrs eth;
+ struct flow_dissector_key_vlan vlan;
struct flow_dissector_key_addrs ipaddrs;
union {
struct flow_dissector_key_ipv4_addrs ipv4;
@@ -293,6 +294,10 @@ static const struct nla_policy fl_policy[TCA_FLOWER_MAX +
1] = {
[TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 },
+ [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 },
+ [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 },
+ [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 },
+
};
static void fl_set_key_val(struct nlattr **tb,
@@ -308,9 +313,29 @@ static void fl_set_key_val(struct nlattr **tb,
memcpy(mask, nla_data(tb[mask_type]), len);
}
+static void fl_set_key_vlan(struct nlattr **tb,
+ struct flow_dissector_key_vlan *key_val,
+ struct flow_dissector_key_vlan *key_mask)
+{
+#define VLAN_PRIORITY_MASK 0x7
+
+ if (tb[TCA_FLOWER_KEY_VLAN_ID]) {
+ key_val->vlan_id =
+ nla_get_u16(tb[TCA_FLOWER_KEY_VLAN_ID]) & VLAN_VID_MASK;
+ key_mask->vlan_id = VLAN_VID_MASK;
+ }
+ if (tb[TCA_FLOWER_KEY_VLAN_PRIO]) {
+ key_val->vlan_priority =
+ nla_get_u8(tb[TCA_FLOWER_KEY_VLAN_PRIO]) &
+ VLAN_PRIORITY_MASK;
+ key_mask->vlan_priority = VLAN_PRIORITY_MASK;
+ }
+}
+
static int fl_set_key(struct net *net, struct nlattr **tb,
struct fl_flow_key *key, struct fl_flow_key *mask)
{
+ __be16 ethertype;
#ifdef CONFIG_NET_CLS_IND
if (tb[TCA_FLOWER_INDEV]) {
int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV]);
@@ -328,9 +353,19 @@ static int fl_set_key(struct net *net, struct nlattr **tb,
mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
sizeof(key->eth.src));
- fl_set_key_val(tb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
- &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
- sizeof(key->basic.n_proto));
+ if (tb[TCA_FLOWER_KEY_ETH_TYPE])
+ ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]);
+
+ if (ethertype == htons(ETH_P_8021Q)) {
+ fl_set_key_vlan(tb, &key->vlan, &mask->vlan);
+ fl_set_key_val(tb, &key->basic.n_proto,
+ TCA_FLOWER_KEY_VLAN_ETH_TYPE,
+ &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
+ sizeof(key->basic.n_proto));
+ } else {
+ key->basic.n_proto = ethertype;
+ mask->basic.n_proto = cpu_to_be16(~0);
+ }
if (key->basic.n_proto == htons(ETH_P_IP) ||
key->basic.n_proto == htons(ETH_P_IPV6)) {
@@ -438,6 +473,8 @@ static void fl_init_dissector(struct cls_fl_head *head,
FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
FLOW_DISSECTOR_KEY_PORTS, tp);
+ FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
+ FLOW_DISSECTOR_KEY_VLAN, vlan);
skb_flow_dissector_init(&head->dissector, keys, cnt);
}
@@ -666,6 +703,29 @@ static int fl_dump_key_val(struct sk_buff *skb,
return 0;
}
+static int fl_dump_key_vlan(struct sk_buff *skb,
+ struct flow_dissector_key_vlan *vlan_key,
+ struct flow_dissector_key_vlan *vlan_mask)
+{
+ int err;
+
+ if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask)))
+ return 0;
+ if (vlan_mask->vlan_id) {
+ err = nla_put_u16(skb, TCA_FLOWER_KEY_VLAN_ID,
+ vlan_key->vlan_id);
+ if (err)
+ return err;
+ }
+ if (vlan_mask->vlan_priority) {
+ err = nla_put_u8(skb, TCA_FLOWER_KEY_VLAN_PRIO,
+ vlan_key->vlan_priority);
+ if (err)
+ return err;
+ }
+ return 0;
+}
+
static int fl_dump(struct net *net, struct tcf_proto *tp, unsigned long fh,
struct sk_buff *skb, struct tcmsg *t)
{
@@ -710,6 +770,10 @@ static int fl_dump(struct net *net, struct tcf_proto *tp,
unsigned long fh,
&mask->basic.n_proto, TCA_FLOWER_UNSPEC,
sizeof(key->basic.n_proto)))
goto nla_put_failure;
+
+ if (fl_dump_key_vlan(skb, &key->vlan, &mask->vlan))
+ goto nla_put_failure;
+
if ((key->basic.n_proto == htons(ETH_P_IP) ||
key->basic.n_proto == htons(ETH_P_IPV6)) &&
fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
--
1.8.3.1
