diff options
| author | Alexei Starovoitov <ast@plumgrid.com> | 2015-09-15 23:05:43 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-09-17 21:09:07 -0700 |
| commit | 27b29f63058d26c6c1742f1993338280d5a41dc6 (patch) | |
| tree | 4a74088c6a959041fd267fcf03466ca7eea355e1 /net/sched | |
| parent | 045efa82ff563cd4e656ca1c2e354fa5bf6bbda4 (diff) | |
bpf: add bpf_redirect() helper
Existing bpf_clone_redirect() helper clones skb before redirecting
it to RX or TX of destination netdev.
Introduce bpf_redirect() helper that does that without cloning.
Benchmarked with two hosts using 10G ixgbe NICs.
One host is doing line rate pktgen.
Another host is configured as:
$ tc qdisc add dev $dev ingress
$ tc filter add dev $dev root pref 10 u32 match u32 0 0 flowid 1:2 \
action bpf run object-file tcbpf1_kern.o section clone_redirect_xmit drop
so it receives the packet on $dev and immediately xmits it on $dev + 1
The section 'clone_redirect_xmit' in tcbpf1_kern.o file has the program
that does bpf_clone_redirect() and performance is 2.0 Mpps
$ tc filter add dev $dev root pref 10 u32 match u32 0 0 flowid 1:2 \
action bpf run object-file tcbpf1_kern.o section redirect_xmit drop
which is using bpf_redirect() - 2.4 Mpps
and using cls_bpf with integrated actions as:
$ tc filter add dev $dev root pref 10 \
bpf run object-file tcbpf1_kern.o section redirect_xmit integ_act classid 1
performance is 2.5 Mpps
To summarize:
u32+act_bpf using clone_redirect - 2.0 Mpps
u32+act_bpf using redirect - 2.4 Mpps
cls_bpf using redirect - 2.5 Mpps
For comparison linux bridge in this setup is doing 2.1 Mpps
and ixgbe rx + drop in ip_rcv - 7.8 Mpps
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched')
| -rw-r--r-- | net/sched/act_bpf.c | 1 | ||||
| -rw-r--r-- | net/sched/cls_bpf.c | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/net/sched/act_bpf.c b/net/sched/act_bpf.c index 559bfa011bda..0bc6f912f870 100644 --- a/net/sched/act_bpf.c +++ b/net/sched/act_bpf.c @@ -72,6 +72,7 @@ static int tcf_bpf(struct sk_buff *skb, const struct tc_action *act, case TC_ACT_PIPE: case TC_ACT_RECLASSIFY: case TC_ACT_OK: + case TC_ACT_REDIRECT: action = filter_res; break; case TC_ACT_SHOT: diff --git a/net/sched/cls_bpf.c b/net/sched/cls_bpf.c index 77b0ef148256..0590816ab7b0 100644 --- a/net/sched/cls_bpf.c +++ b/net/sched/cls_bpf.c @@ -70,6 +70,7 @@ static int cls_bpf_exec_opcode(int code) case TC_ACT_PIPE: case TC_ACT_STOLEN: case TC_ACT_QUEUED: + case TC_ACT_REDIRECT: case TC_ACT_UNSPEC: return code; default: |