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Commit ac80c2a1 authored by William Tu's avatar William Tu Committed by David S. Miller
Browse files

samples/bpf: add erspan v2 sample code 



Extend the existing tests for ipv4 ipv6 erspan version 2.

Signed-off-by: default avatarWilliam Tu <u9012063@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 94d7d8f2

samples/bpf/tcbpf2_kern.c

+68 −9
Original line number Diff line number Diff line
@@ -35,12 +35,22 @@ struct geneve_opt { 
	u8	opt_data[8]; /* hard-coded to 8 byte */

};



struct erspan_md2 {

	__be32 timestamp;

	__be16 sgt;

	__be16 flags;

};



struct vxlan_metadata {

	u32     gbp;

};



struct erspan_metadata {

	union {

		__be32 index;

		struct erspan_md2 md2;

	} u;

	int version;

};



SEC("gre_set_tunnel")
@@ -143,7 +153,18 @@ int _erspan_set_tunnel(struct __sk_buff *skb) 
		return TC_ACT_SHOT;

	}



	md.index = htonl(123);

	__builtin_memset(&md, 0, sizeof(md));

#ifdef ERSPAN_V1

	md.version = 1;

	md.u.index = htonl(123);

#else

	u8 direction = 1;

	u16 hwid = 7;



	md.version = 2;

	md.u.md2.flags = htons((direction << 3) | (hwid << 4));

#endif



	ret = bpf_skb_set_tunnel_opt(skb, &md, sizeof(md));

	if (ret < 0) {

		ERROR(ret);
@@ -156,7 +177,7 @@ int _erspan_set_tunnel(struct __sk_buff *skb) 
SEC("erspan_get_tunnel")

int _erspan_get_tunnel(struct __sk_buff *skb)

{

	char fmt[] = "key %d remote ip 0x%x erspan index 0x%x\n";

	char fmt[] = "key %d remote ip 0x%x erspan version %d\n";

	struct bpf_tunnel_key key;

	struct erspan_metadata md;

	u32 index;
@@ -174,9 +195,22 @@ int _erspan_get_tunnel(struct __sk_buff *skb) 
		return TC_ACT_SHOT;

	}



	index = bpf_ntohl(md.index);

	bpf_trace_printk(fmt, sizeof(fmt),

			key.tunnel_id, key.remote_ipv4, index);

			key.tunnel_id, key.remote_ipv4, md.version);



#ifdef ERSPAN_V1

	char fmt2[] = "\tindex %x\n";



	index = bpf_ntohl(md.u.index);

	bpf_trace_printk(fmt2, sizeof(fmt2), index);

#else

	char fmt2[] = "\tdirection %d hwid %x timestamp %u\n";



	bpf_trace_printk(fmt2, sizeof(fmt2),

		(ntohs(md.u.md2.flags) >> 3) & 0x1,

		(ntohs(md.u.md2.flags) >> 4) & 0x3f,

		bpf_ntohl(md.u.md2.timestamp));

#endif



	return TC_ACT_OK;

}
@@ -201,7 +235,19 @@ int _ip4ip6erspan_set_tunnel(struct __sk_buff *skb) 
		return TC_ACT_SHOT;

	}



	md.index = htonl(123);

	__builtin_memset(&md, 0, sizeof(md));



#ifdef ERSPAN_V1

	md.u.index = htonl(123);

	md.version = 1;

#else

	u8 direction = 0;

	u16 hwid = 17;



	md.version = 2;

	md.u.md2.flags = htons((direction << 3) | (hwid << 4));

#endif



	ret = bpf_skb_set_tunnel_opt(skb, &md, sizeof(md));

	if (ret < 0) {

		ERROR(ret);
@@ -214,7 +260,7 @@ int _ip4ip6erspan_set_tunnel(struct __sk_buff *skb) 
SEC("ip4ip6erspan_get_tunnel")

int _ip4ip6erspan_get_tunnel(struct __sk_buff *skb)

{

	char fmt[] = "key %d remote ip6 ::%x erspan index 0x%x\n";

	char fmt[] = "ip6erspan get key %d remote ip6 ::%x erspan version %d\n";

	struct bpf_tunnel_key key;

	struct erspan_metadata md;

	u32 index;
@@ -232,9 +278,22 @@ int _ip4ip6erspan_get_tunnel(struct __sk_buff *skb) 
		return TC_ACT_SHOT;

	}



	index = bpf_ntohl(md.index);

	bpf_trace_printk(fmt, sizeof(fmt),

			key.tunnel_id, key.remote_ipv6[0], index);

			key.tunnel_id, key.remote_ipv4, md.version);



#ifdef ERSPAN_V1

	char fmt2[] = "\tindex %x\n";



	index = bpf_ntohl(md.u.index);

	bpf_trace_printk(fmt2, sizeof(fmt2), index);

#else

	char fmt2[] = "\tdirection %d hwid %x timestamp %u\n";



	bpf_trace_printk(fmt2, sizeof(fmt2),

		(ntohs(md.u.md2.flags) >> 3) & 0x1,

		(ntohs(md.u.md2.flags) >> 4) & 0x3f,

		bpf_ntohl(md.u.md2.timestamp));

#endif



	return TC_ACT_OK;

}

samples/bpf/test_tunnel_bpf.sh

+28 −10
Original line number Diff line number Diff line
@@ -59,8 +59,17 @@ function add_ip6gretap_tunnel { 


function add_erspan_tunnel {

	# in namespace

	if [ "$1" == "v1" ]; then

		ip netns exec at_ns0 \

		ip link add dev $DEV_NS type $TYPE seq key 2 local 172.16.1.100 remote 172.16.1.200 erspan 123

		ip link add dev $DEV_NS type $TYPE seq key 2 \

		local 172.16.1.100 remote 172.16.1.200 \

		erspan_ver 1 erspan 123

	else

		ip netns exec at_ns0 \

		ip link add dev $DEV_NS type $TYPE seq key 2 \

		local 172.16.1.100 remote 172.16.1.200 \

		erspan_ver 2 erspan_dir 1 erspan_hwid 3

	fi

	ip netns exec at_ns0 ip link set dev $DEV_NS up

	ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24
@@ -79,10 +88,17 @@ function add_ip6erspan_tunnel { 
	ip link set dev veth1 up



	# in namespace

	if [ "$1" == "v1" ]; then

		ip netns exec at_ns0 \

		ip link add dev $DEV_NS type $TYPE seq key 2 erspan 123 \

		local ::11 remote ::22



		ip link add dev $DEV_NS type $TYPE seq key 2 \

		local ::11 remote ::22 \

		erspan_ver 1 erspan 123

	else

		ip netns exec at_ns0 \

		ip link add dev $DEV_NS type $TYPE seq key 2 \

		local ::11 remote ::22 \

		erspan_ver 2 erspan_dir 1 erspan_hwid 7

	fi

	ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24

	ip netns exec at_ns0 ip link set dev $DEV_NS up
@@ -199,7 +215,7 @@ function test_erspan { 
	DEV_NS=erspan00

	DEV=erspan11

	config_device

	add_erspan_tunnel

	add_erspan_tunnel $1

	attach_bpf $DEV erspan_set_tunnel erspan_get_tunnel

	ping -c 1 10.1.1.100

	ip netns exec at_ns0 ping -c 1 10.1.1.200
@@ -211,7 +227,7 @@ function test_ip6erspan { 
	DEV_NS=ip6erspan00

	DEV=ip6erspan11

	config_device

	add_ip6erspan_tunnel

	add_ip6erspan_tunnel $1

	attach_bpf $DEV ip4ip6erspan_set_tunnel ip4ip6erspan_get_tunnel

	ping6 -c 3 ::11

	ip netns exec at_ns0 ping -c 1 10.1.1.200
@@ -288,9 +304,11 @@ test_ip6gre 
echo "Testing IP6GRETAP tunnel..."

test_ip6gretap

echo "Testing ERSPAN tunnel..."

test_erspan

test_erspan v1

test_erspan v2

echo "Testing IP6ERSPAN tunnel..."

test_ip6erspan

test_ip6erspan v1

test_ip6erspan v2

echo "Testing VXLAN tunnel..."

test_vxlan

echo "Testing GENEVE tunnel..."