Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 41 insertions, 0 deletions

diff --git a/samples/bpf/test_overhead_kprobe.bpf.c b/samples/bpf/test_overhead_kprobe.bpf.c
new file mode 100644
index 000000000..668cf5259
--- /dev/null
+++ b/samples/bpf/test_overhead_kprobe.bpf.c
@@ -0,0 +1,41 @@
+/* Copyright (c) 2016 Facebook
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ */
+#include "vmlinux.h"
+#include <linux/version.h>
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_tracing.h>
+#include <bpf/bpf_core_read.h>
+
+SEC("kprobe/__set_task_comm")
+int prog(struct pt_regs *ctx)
+{
+	struct signal_struct *signal;
+	struct task_struct *tsk;
+	char oldcomm[TASK_COMM_LEN] = {};
+	char newcomm[TASK_COMM_LEN] = {};
+	u16 oom_score_adj;
+	u32 pid;
+
+	tsk = (void *)PT_REGS_PARM1_CORE(ctx);
+
+	pid = BPF_CORE_READ(tsk, pid);
+	bpf_core_read_str(oldcomm, sizeof(oldcomm), &tsk->comm);
+	bpf_core_read_str(newcomm, sizeof(newcomm),
+				  (void *)PT_REGS_PARM2(ctx));
+	signal = BPF_CORE_READ(tsk, signal);
+	oom_score_adj = BPF_CORE_READ(signal, oom_score_adj);
+	return 0;
+}
+
+SEC("kprobe/fib_table_lookup")
+int prog2(struct pt_regs *ctx)
+{
+	return 0;
+}
+
+char _license[] SEC("license") = "GPL";
+u32 _version SEC("version") = LINUX_VERSION_CODE;