diff options
| author | Daniel Borkmann <daniel@iogearbox.net> | 2015-09-16 08:05:42 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-09-18 06:09:06 +0200 |
| commit | 045efa82ff563cd4e656ca1c2e354fa5bf6bbda4 (patch) | |
| tree | 8a2604aef00d9d40a6eaa877431171c3a38c3663 /include | |
| parent | net: only check perm protocol when register proto (diff) | |
| download | linux-045efa82ff563cd4e656ca1c2e354fa5bf6bbda4.tar.xz linux-045efa82ff563cd4e656ca1c2e354fa5bf6bbda4.zip | |
cls_bpf: introduce integrated actions
Often cls_bpf classifier is used with single action drop attached.
Optimize this use case and let cls_bpf return both classid and action.
For backwards compatibility reasons enable this feature under
TCA_BPF_FLAG_ACT_DIRECT flag.
Then more interesting programs like the following are easier to write:
int cls_bpf_prog(struct __sk_buff *skb)
{
/* classify arp, ip, ipv6 into different traffic classes
* and drop all other packets
*/
switch (skb->protocol) {
case htons(ETH_P_ARP):
skb->tc_classid = 1;
break;
case htons(ETH_P_IP):
skb->tc_classid = 2;
break;
case htons(ETH_P_IPV6):
skb->tc_classid = 3;
break;
default:
return TC_ACT_SHOT;
}
return TC_ACT_OK;
}
Joint work with Daniel Borkmann.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/sch_generic.h | 2 | ||||
| -rw-r--r-- | include/uapi/linux/bpf.h | 1 | ||||
| -rw-r--r-- | include/uapi/linux/pkt_cls.h | 3 |
3 files changed, 5 insertions, 1 deletions
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h index 444faa89a55f..da61febb9091 100644 --- a/include/net/sch_generic.h +++ b/include/net/sch_generic.h @@ -251,7 +251,7 @@ struct tcf_proto { struct qdisc_skb_cb { unsigned int pkt_len; u16 slave_dev_queue_mapping; - u16 _pad; + u16 tc_classid; #define QDISC_CB_PRIV_LEN 20 unsigned char data[QDISC_CB_PRIV_LEN]; }; diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index 92a48e2d5461..2fbd1c71fa3b 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -293,6 +293,7 @@ struct __sk_buff { __u32 tc_index; __u32 cb[5]; __u32 hash; + __u32 tc_classid; }; struct bpf_tunnel_key { diff --git a/include/uapi/linux/pkt_cls.h b/include/uapi/linux/pkt_cls.h index 4f0d1bc3647d..0a262a83f9d4 100644 --- a/include/uapi/linux/pkt_cls.h +++ b/include/uapi/linux/pkt_cls.h @@ -373,6 +373,8 @@ enum { /* BPF classifier */ +#define TCA_BPF_FLAG_ACT_DIRECT (1 << 0) + enum { TCA_BPF_UNSPEC, TCA_BPF_ACT, @@ -382,6 +384,7 @@ enum { TCA_BPF_OPS, TCA_BPF_FD, TCA_BPF_NAME, + TCA_BPF_FLAGS, __TCA_BPF_MAX, }; |