bpf: add mod default A and X test cases (d4e4bc16) · Commits · 戴 / test

When running "mod X" operation, if X is 0 the filter has to be halt. Add new test cases to cover A = A mod X if X is 0, and A = A mod 1. CC: Xi Wang <xi.wang@gmail.com> CC: Zi Shen Lim <zlim.lnx@gmail.com> Signed-off-by:

Yang Shi <yang.shi@linaro.org> Acked-by:

Daniel Borkmann <daniel@iogearbox.net> Acked-by:

Alexei Starovoitov <ast@kernel.org> Acked-by:

Zi Shen Lim <zlim.lnx@gmail.com> Acked-by:

Xi Wang <xi.wang@gmail.com> Signed-off-by:

David S. Miller <davem@davemloft.net>

lib/test_bpf.c

+30 −0

Original line number	Diff line number	Diff line
		@@ -5055,6 +5055,36 @@ static struct bpf_test tests[] = {
		{},
		{ {0x1, 0x0 } },
		},
		{
		"MOD default X",
		.u.insns = {
		/*
		* A = 0x42
		* A = A mod X ; this halt the filter execution if X is 0
		* ret 0x42
		*/
		BPF_STMT(BPF_LD \| BPF_IMM, 0x42),
		BPF_STMT(BPF_ALU \| BPF_MOD \| BPF_X, 0),
		BPF_STMT(BPF_RET \| BPF_K, 0x42),
		},
		CLASSIC \| FLAG_NO_DATA,
		{},
		{ {0x1, 0x0 } },
		},
		{
		"MOD default A",
		.u.insns = {
		/*
		* A = A mod 1
		* ret A
		*/
		BPF_STMT(BPF_ALU \| BPF_MOD \| BPF_K, 0x1),
		BPF_STMT(BPF_RET \| BPF_A, 0x0),
		},
		CLASSIC \| FLAG_NO_DATA,
		{},
		{ {0x1, 0x0 } },
		},
		{
		"JMP EQ default A",
		.u.insns = {

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