Squash to "selftests/bpf: Add bpf_first scheduler & test"

Use the newly added bpf_for_each() helper to walk the conn_list.

Drop bpf_mptcp_subflow_ctx_by_pos declaration.

Signed-off-by: Geliang Tang <[email protected]>

Author: Geliang Tang

tools/testing/selftests/bpf/progs/mptcp_bpf.h

@@ -55,7 +55,4 @@ bpf_mptcp_subflow_tcp_sock(const struct mptcp_subflow_context *subflow) __ksym;
 extern void mptcp_subflow_set_scheduled(struct mptcp_subflow_context *subflow,
 					bool scheduled) __ksym;
 
-extern struct mptcp_subflow_context *
-bpf_mptcp_subflow_ctx_by_pos(const struct mptcp_sched_data *data, unsigned int pos) __ksym;
-
 #endif

tools/testing/selftests/bpf/progs/mptcp_bpf_first.c

@@ -20,7 +20,13 @@ SEC("struct_ops")
 int BPF_PROG(bpf_first_get_subflow, struct mptcp_sock *msk,
 	     struct mptcp_sched_data *data)
 {
-	mptcp_subflow_set_scheduled(bpf_mptcp_subflow_ctx_by_pos(data, 0), true);
+	struct mptcp_subflow_context *subflow;
+
+	subflow = bpf_mptcp_subflow_ctx(msk->first);
+	if (!subflow)
+		return -1;
+
+	mptcp_subflow_set_scheduled(subflow, true);
 	return 0;
 }