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Commit d4e4bc16 authored by Yang Shi's avatar Yang Shi Committed by David S. Miller
Browse files

bpf: add mod default A and X test cases 



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: default avatarYang Shi <yang.shi@linaro.org>
Acked-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Acked-by: default avatarAlexei Starovoitov <ast@kernel.org>
Acked-by: default avatarZi Shen Lim <zlim.lnx@gmail.com>
Acked-by: default avatarXi Wang <xi.wang@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent df761ea1

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 = {