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selftests/bpf: Add tests for type tag order validation 

Add a few test cases that ensure we catch cases of badly ordered type
tags in modifier chains.

Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20220419164608.1990559-3-memxor@gmail.com
This commit is contained in:
Kumar Kartikeya Dwivedi 2022-04-19 22:16:08 +05:30 committed by Alexei Starovoitov
parent eb596b0905
commit 24fe983abe
1 changed files with 99 additions and 0 deletions
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99
tools/testing/selftests/bpf/prog_tests/btf.c
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@ -3973,6 +3973,105 @@ static struct btf_raw_test raw_tests[] = {
.value_type_id = 1,
.max_entries = 1,
},
{
.descr = "type_tag test #2, type tag order",
.raw_types = {
BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */
BTF_CONST_ENC(3), /* [2] */
BTF_TYPE_TAG_ENC(NAME_TBD, 1), /* [3] */
BTF_END_RAW,
},
BTF_STR_SEC("\0tag"),
.map_type = BPF_MAP_TYPE_ARRAY,
.map_name = "tag_type_check_btf",
.key_size = sizeof(int),
.value_size = 4,
.key_type_id = 1,
.value_type_id = 1,
.max_entries = 1,
.btf_load_err = true,
.err_str = "Type tags don't precede modifiers",
},
{
.descr = "type_tag test #3, type tag order",
.raw_types = {
BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */
BTF_TYPE_TAG_ENC(NAME_TBD, 3), /* [2] */
BTF_CONST_ENC(4), /* [3] */
BTF_TYPE_TAG_ENC(NAME_TBD, 1), /* [4] */
BTF_END_RAW,
},
BTF_STR_SEC("\0tag\0tag"),
.map_type = BPF_MAP_TYPE_ARRAY,
.map_name = "tag_type_check_btf",
.key_size = sizeof(int),
.value_size = 4,
.key_type_id = 1,
.value_type_id = 1,
.max_entries = 1,
.btf_load_err = true,
.err_str = "Type tags don't precede modifiers",
},
{
.descr = "type_tag test #4, type tag order",
.raw_types = {
BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */
BTF_TYPEDEF_ENC(NAME_TBD, 3), /* [2] */
BTF_CONST_ENC(4), /* [3] */
BTF_TYPE_TAG_ENC(NAME_TBD, 1), /* [4] */
BTF_END_RAW,
},
BTF_STR_SEC("\0tag\0tag"),
.map_type = BPF_MAP_TYPE_ARRAY,
.map_name = "tag_type_check_btf",
.key_size = sizeof(int),
.value_size = 4,
.key_type_id = 1,
.value_type_id = 1,
.max_entries = 1,
.btf_load_err = true,
.err_str = "Type tags don't precede modifiers",
},
{
.descr = "type_tag test #5, type tag order",
.raw_types = {
BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */
BTF_TYPE_TAG_ENC(NAME_TBD, 3), /* [2] */
BTF_CONST_ENC(1), /* [3] */
BTF_TYPE_TAG_ENC(NAME_TBD, 2), /* [4] */
BTF_END_RAW,
},
BTF_STR_SEC("\0tag\0tag"),
.map_type = BPF_MAP_TYPE_ARRAY,
.map_name = "tag_type_check_btf",
.key_size = sizeof(int),
.value_size = 4,
.key_type_id = 1,
.value_type_id = 1,
.max_entries = 1,
},
{
.descr = "type_tag test #6, type tag order",
.raw_types = {
BTF_PTR_ENC(2), /* [1] */
BTF_TYPE_TAG_ENC(NAME_TBD, 3), /* [2] */
BTF_CONST_ENC(4), /* [3] */
BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [4] */
BTF_PTR_ENC(6), /* [5] */
BTF_CONST_ENC(2), /* [6] */
BTF_END_RAW,
},
BTF_STR_SEC("\0tag"),
.map_type = BPF_MAP_TYPE_ARRAY,
.map_name = "tag_type_check_btf",
.key_size = sizeof(int),
.value_size = 4,
.key_type_id = 1,
.value_type_id = 1,
.max_entries = 1,
.btf_load_err = true,
.err_str = "Type tags don't precede modifiers",
},
}; /* struct btf_raw_test raw_tests[] */