mirror/xdp-project-bpf-examples
1
0
Fork 0
mirror of https://github.com/xdp-project/bpf-examples.git synced 2024-05-06 15:54:53 +00:00
Code Issues Projects Releases Wiki Activity

traffic-pacing-edt: Handle if VLAN is offloaded to SKB metadata

Browse Source 
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
This commit is contained in:
Jesper Dangaard Brouer
2020-11-15 21:19:10 +01:00
parent 6a67b105ee
commit a0f3760d6c
1 changed files with 10 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
traffic-pacing-edt/edt_pacer02.c
View File

@@ -119,6 +119,7 @@ SEC("classifier") int tc_edt_simple(struct __sk_buff *skb)
struct collect_vlans vlans = { 0 };
struct ethhdr *eth;
int ret = BPF_OK;
__u16 vlan_key;
/* These keep track of the next header type and iterator pointer */
struct hdr_cursor nh;
@@ -135,14 +136,19 @@ SEC("classifier") int tc_edt_simple(struct __sk_buff *skb)
goto out;
}
if (!proto_is_vlan(eth->h_proto)) {
if (!proto_is_vlan(eth->h_proto) && !skb->vlan_present) {
/* Skip non-VLAN frames */
return BPF_OK;
}
/* Match on vlan16 and only apply EDT on that */
// FIXME: handle if VLAN is not inlined in packet
if (vlans.id[0] == 16)
/* NIC can HW "offload" the outer VLAN, moving it to skb context */
if (skb->vlan_present)
vlan_key = vlans.id[0]; /* Inner vlan placed as first inline */
else
vlan_key = vlans.id[1]; /* All VLAN headers inline */
/* For-now: Match on vlan16 and only apply EDT on that */
if (vlan_key == 16)
return sched_departure(skb);
out: