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authorWilliam Tu2017-12-14 01:38:58 +0100
committerDavid S. Miller2017-12-15 18:34:00 +0100
commitac80c2a165af02a0cca3d17d534a85d37fdc1271 (patch)
treef1cf7a172a8410fcd1c4be1f4389830ed8f200d9 /samples/bpf/tcbpf2_kern.c
parentip6_gre: add erspan v2 support (diff)
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samples/bpf: add erspan v2 sample code
Extend the existing tests for ipv4 ipv6 erspan version 2. Signed-off-by: William Tu <u9012063@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'samples/bpf/tcbpf2_kern.c')
-rw-r--r--samples/bpf/tcbpf2_kern.c77
1 files changed, 68 insertions, 9 deletions
diff --git a/samples/bpf/tcbpf2_kern.c b/samples/bpf/tcbpf2_kern.c
index 79ad061079dd..f6bbf8f50da3 100644
--- a/samples/bpf/tcbpf2_kern.c
+++ b/samples/bpf/tcbpf2_kern.c
@@ -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 {
- __be32 index;
+ 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;
}