| #!/usr/bin/env python |
| # Copyright (c) 2018 Clevernet, Inc. |
| # Licensed under the Apache License, Version 2.0 (the "License") |
| |
| import unittest |
| from bcc import BPF |
| |
| class TestLicense(unittest.TestCase): |
| gpl_only_text = """ |
| #include <uapi/linux/ptrace.h> |
| BPF_STACK_TRACE(stack_traces, 10240); |
| struct gpl_s { |
| u64 ts; |
| int id; |
| }; |
| BPF_PERF_OUTPUT(events); |
| int license_program(struct pt_regs *ctx) { |
| struct gpl_s data = {}; |
| data.id = stack_traces.get_stackid(ctx, BPF_F_REUSE_STACKID); |
| data.ts = bpf_ktime_get_ns(); |
| events.perf_submit(ctx, &data, sizeof(data)); |
| return 0; |
| } |
| """ |
| |
| proprietary_text = """ |
| #include <uapi/linux/ptrace.h> |
| struct key_t { |
| u64 ip; |
| u32 pid; |
| u32 uid; |
| char comm[16]; |
| }; |
| |
| BPF_HASH(counts, struct key_t); |
| |
| int license_program(struct pt_regs *ctx) { |
| struct key_t key = {}; |
| u64 zero = 0 , *val; |
| u64 pid = bpf_get_current_pid_tgid(); |
| u32 uid = bpf_get_current_uid_gid(); |
| |
| key.ip = PT_REGS_IP(ctx); |
| key.pid = pid & 0xFFFFFFFF; |
| key.uid = uid & 0xFFFFFFFF; |
| bpf_get_current_comm(&(key.comm), 16); |
| |
| val = counts.lookup_or_init(&key, &zero); // update counter |
| (*val)++; |
| return 0; |
| } |
| """ |
| |
| def license(self, lic): |
| return ''' |
| #define BPF_LICENSE %s |
| ''' % (lic) |
| |
| def load_bpf_code(self, bpf_code): |
| event_name = bpf_code.get_syscall_fnname("read") |
| bpf_code.attach_kprobe(event=event_name, fn_name="license_program") |
| bpf_code.detach_kprobe(event=event_name) |
| |
| def test_default(self): |
| b = BPF(text=self.gpl_only_text) |
| self.load_bpf_code(b) |
| |
| def test_gpl_helper(self): |
| b = BPF(text=self.gpl_only_text, cflags=["-DBPF_LICENSE=GPL"]) |
| self.load_bpf_code(b) |
| |
| def test_gpl_helper_macro(self): |
| b = BPF(text=self.gpl_only_text + self.license('GPL')) |
| self.load_bpf_code(b) |
| |
| def test_proprietary(self): |
| b = BPF(text=self.proprietary_text, cflags=["-DBPF_LICENSE=Proprietary"]) |
| self.load_bpf_code(b) |
| |
| def test_proprietary_macro(self): |
| b = BPF(text=self.proprietary_text + self.license('Proprietary')) |
| self.load_bpf_code(b) |
| |
| def test_gpl_compatible(self): |
| b = BPF(text=self.gpl_only_text, cflags=["-DBPF_LICENSE=Dual BSD/GPL"]) |
| self.load_bpf_code(b) |
| |
| def test_gpl_compatible_macro(self): |
| b = BPF(text=self.gpl_only_text + self.license('Dual BSD/GPL')) |
| self.load_bpf_code(b) |
| |
| def test_proprietary_words(self): |
| b = BPF(text=self.proprietary_text, cflags=["-DBPF_LICENSE=Proprietary license"]) |
| self.load_bpf_code(b) |
| |
| def test_proprietary_words_macro(self): |
| b = BPF(text=self.proprietary_text + self.license('Proprietary license')) |
| self.load_bpf_code(b) |
| |
| @unittest.expectedFailure |
| def test_empty_fail(self): |
| b = BPF(text=self.gpl_only_text, cflags=["-DBPF_LICENSE="]) |
| self.load_bpf_code(b) |
| |
| @unittest.expectedFailure |
| def test_empty_fail_macro(self): |
| b = BPF(text=self.gpl_only_text + self.license('')) |
| self.load_bpf_code(b) |
| |
| @unittest.expectedFailure |
| def test_proprietary_fail(self): |
| b = BPF(text=self.gpl_only_text, cflags=["-DBPF_LICENSE=Proprietary license"]) |
| self.load_bpf_code(b) |
| |
| @unittest.expectedFailure |
| def test_proprietary_fail_macro(self): |
| b = BPF(text=self.gpl_only_text + self.license('Proprietary license')) |
| self.load_bpf_code(b) |
| |
| if __name__ == "__main__": |
| unittest.main() |