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authorEyal Birger <eyal.birger@gmail.com>2018-04-24 17:50:30 +0300
committerDaniel Borkmann <daniel@iogearbox.net>2018-04-24 22:26:58 +0200
commit29a36f9eef30b7f008b722a753a84b314f981037 (patch)
tree9790a515413c05b19aa0eb988ef002a2cdb1dc05 /tools/include
parent12bed760a78da6e12ac8252fec64d019a9eac523 (diff)
downloadlinux-29a36f9eef30b7f008b722a753a84b314f981037.tar.bz2
samples/bpf: extend test_tunnel_bpf.sh with xfrm state test
Add a test for fetching xfrm state parameters from a tc program running on ingress. Signed-off-by: Eyal Birger <eyal.birger@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'tools/include')
-rw-r--r--tools/include/uapi/linux/bpf.h25
1 files changed, 24 insertions, 1 deletions
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index 7f7fbb9d0253..5841ed41b30c 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -774,6 +774,15 @@ union bpf_attr {
* @xdp_md: pointer to xdp_md
* @delta: A negative integer to be added to xdp_md.data_end
* Return: 0 on success or negative on error
+ *
+ * int bpf_skb_get_xfrm_state(skb, index, xfrm_state, size, flags)
+ * retrieve XFRM state
+ * @skb: pointer to skb
+ * @index: index of the xfrm state in the secpath
+ * @key: pointer to 'struct bpf_xfrm_state'
+ * @size: size of 'struct bpf_xfrm_state'
+ * @flags: room for future extensions
+ * Return: 0 on success or negative error
*/
#define __BPF_FUNC_MAPPER(FN) \
FN(unspec), \
@@ -841,7 +850,8 @@ union bpf_attr {
FN(msg_cork_bytes), \
FN(msg_pull_data), \
FN(bind), \
- FN(xdp_adjust_tail),
+ FN(xdp_adjust_tail), \
+ FN(skb_get_xfrm_state),
/* integer value in 'imm' field of BPF_CALL instruction selects which helper
* function eBPF program intends to call
@@ -946,6 +956,19 @@ struct bpf_tunnel_key {
__u32 tunnel_label;
};
+/* user accessible mirror of in-kernel xfrm_state.
+ * new fields can only be added to the end of this structure
+ */
+struct bpf_xfrm_state {
+ __u32 reqid;
+ __u32 spi; /* Stored in network byte order */
+ __u16 family;
+ union {
+ __u32 remote_ipv4; /* Stored in network byte order */
+ __u32 remote_ipv6[4]; /* Stored in network byte order */
+ };
+};
+
/* Generic BPF return codes which all BPF program types may support.
* The values are binary compatible with their TC_ACT_* counter-part to
* provide backwards compatibility with existing SCHED_CLS and SCHED_ACT