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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: 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>
hifive-unleashed-5.1
Yang Shi 2015-11-04 11:36:37 -08:00 committed by David S. Miller
parent df761ea1f3
commit d4e4bc1610
1 changed files with 30 additions and 0 deletions
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30
lib/test_bpf.c
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@ -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 = {