Add a eBPF helper function to retrieve socket uid
Returns the owner uid of the socket inside a sk_buff. This is useful to
perform per-UID accounting of network traffic or per-UID packet
filtering. The socket need to be a fullsock otherwise overflowuid is
returned.
Signed-off-by: Chenbo Feng <fengc@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index a385185..1ea08ce3 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -507,7 +507,8 @@ union bpf_attr {
FN(skb_change_head), \
FN(xdp_adjust_head), \
FN(probe_read_str), \
- FN(get_socket_cookie),
+ FN(get_socket_cookie), \
+ FN(get_socket_uid),
/* integer value in 'imm' field of BPF_CALL instruction selects which helper
* function eBPF program intends to call