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3-fentry-unlink/.gitignore

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+.vscode
+package.json
+*.o
+*.skel.json
+*.skel.yaml
+package.yaml
+ecli

3-fentry-unlink/fentry-link.bpf.c

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+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/* Copyright (c) 2021 Sartura */
+#include "vmlinux.h"
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_tracing.h>
+
+char LICENSE[] SEC("license") = "Dual BSD/GPL";
+
+SEC("fentry/do_unlinkat")
+int BPF_PROG(do_unlinkat, int dfd, struct filename *name)
+{
+	pid_t pid;
+
+	pid = bpf_get_current_pid_tgid() >> 32;
+	bpf_printk("fentry: pid = %d, filename = %s\n", pid, name->name);
+	return 0;
+}
+
+SEC("fexit/do_unlinkat")
+int BPF_PROG(do_unlinkat_exit, int dfd, struct filename *name, long ret)
+{
+	pid_t pid;
+
+	pid = bpf_get_current_pid_tgid() >> 32;
+	bpf_printk("fexit: pid = %d, filename = %s, ret = %ld\n", pid, name->name, ret);
+	return 0;
+}