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selftests/bpf: Add CPU mask parsing tests

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Add a bunch of test validating CPU mask parsing logic and error handling.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20191212013559.1690898-1-andriin@fb.com
This commit is contained in:
Andrii Nakryiko 2019-12-11 17:35:58 -08:00 committed by Alexei Starovoitov
parent 6803ee25f0
commit 65bc4c4063
1 changed files with 78 additions and 0 deletions
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78
tools/testing/selftests/bpf/prog_tests/cpu_mask.c Normal file
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// SPDX-License-Identifier: GPL-2.0
#include <test_progs.h>
#include <bpf/btf.h>
#include "libbpf_internal.h"
static int duration = 0;
static void validate_mask(int case_nr, const char *exp, bool *mask, int n)
{
int i;
for (i = 0; exp[i]; i++) {
if (exp[i] == '1') {
if (CHECK(i + 1 > n, "mask_short",
"case #%d: mask too short, got n=%d, need at least %d\n",
case_nr, n, i + 1))
return;
CHECK(!mask[i], "cpu_not_set",
"case #%d: mask differs, expected cpu#%d SET\n",
case_nr, i);
} else {
CHECK(i < n && mask[i], "cpu_set",
"case #%d: mask differs, expected cpu#%d UNSET\n",
case_nr, i);
}
}
CHECK(i < n, "mask_long",
"case #%d: mask too long, got n=%d, expected at most %d\n",
case_nr, n, i);
}
static struct {
const char *cpu_mask;
const char *expect;
bool fails;
} test_cases[] = {
{ "0\n", "1", false },
{ "0,2\n", "101", false },
{ "0-2\n", "111", false },
{ "0-2,3-4\n", "11111", false },
{ "0", "1", false },
{ "0-2", "111", false },
{ "0,2", "101", false },
{ "0,1-3", "1111", false },
{ "0,1,2,3", "1111", false },
{ "0,2-3,5", "101101", false },
{ "3-3", "0001", false },
{ "2-4,6,9-10", "00111010011", false },
/* failure cases */
{ "", "", true },
{ "0-", "", true },
{ "0 ", "", true },
{ "0_1", "", true },
{ "1-0", "", true },
{ "-1", "", true },
};
void test_cpu_mask()
{
int i, err, n;
bool *mask;
for (i = 0; i < ARRAY_SIZE(test_cases); i++) {
mask = NULL;
err = parse_cpu_mask_str(test_cases[i].cpu_mask, &mask, &n);
if (test_cases[i].fails) {
CHECK(!err, "should_fail",
"case #%d: parsing should fail!\n", i + 1);
} else {
if (CHECK(err, "parse_err",
"case #%d: cpu mask parsing failed: %d\n",
i + 1, err))
continue;
validate_mask(i + 1, test_cases[i].expect, mask, n);
}
free(mask);
}
}