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test_bpf: add module parameters to filter the tests to run.

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When developping on the interpreter or a particular JIT, it can be
interesting to restrict the tests list to a specific test or a
particular range of tests.

This patch adds the following module parameters to the test_bpf module:

* test_name=<string>: only the specified named test will be run.

* test_id=<number>: only the test with the specified id will be run
  (see the output of test_bpf without parameters to get the test id).

* test_range=<number>,<number>: only the tests within IDs in the
  specified id range are run (see the output of test_bpf without
  parameters to get the test ids).

Any invalid range, test id or test name will result in -EINVAL being
returned and no tests being run.

Signed-off-by: Nicolas Schichan <nschichan@freebox.fr>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nicolas Schichan 2015-08-04 15:19:10 +02:00 committed by David S. Miller
parent 2cf1ad7593
commit d2648d4e26
1 changed files with 71 additions and 0 deletions
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71
lib/test_bpf.c
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@ -4871,10 +4871,73 @@ static int run_one(const struct bpf_prog *fp, struct bpf_test *test)
return err_cnt;
}
static char test_name[64];
module_param_string(test_name, test_name, sizeof(test_name), 0);
static int test_id = -1;
module_param(test_id, int, 0);
static int test_range[2] = { 0, ARRAY_SIZE(tests) - 1 };
module_param_array(test_range, int, NULL, 0);
static __init int find_test_index(const char *test_name)
{
int i;
for (i = 0; i < ARRAY_SIZE(tests); i++) {
if (!strcmp(tests[i].descr, test_name))
return i;
}
return -1;
}
static __init int prepare_bpf_tests(void)
{
int i;
if (test_id >= 0) {
/*
* if a test_id was specified, use test_range to
* cover only that test.
*/
if (test_id >= ARRAY_SIZE(tests)) {
pr_err("test_bpf: invalid test_id specified.\n");
return -EINVAL;
}
test_range[0] = test_id;
test_range[1] = test_id;
} else if (*test_name) {
/*
* if a test_name was specified, find it and setup
* test_range to cover only that test.
*/
int idx = find_test_index(test_name);
if (idx < 0) {
pr_err("test_bpf: no test named '%s' found.\n",
test_name);
return -EINVAL;
}
test_range[0] = idx;
test_range[1] = idx;
} else {
/*
* check that the supplied test_range is valid.
*/
if (test_range[0] >= ARRAY_SIZE(tests) ||
test_range[1] >= ARRAY_SIZE(tests) ||
test_range[0] < 0 || test_range[1] < 0) {
pr_err("test_bpf: test_range is out of bound.\n");
return -EINVAL;
}
if (test_range[1] < test_range[0]) {
pr_err("test_bpf: test_range is ending before it starts.\n");
return -EINVAL;
}
}
for (i = 0; i < ARRAY_SIZE(tests); i++) {
if (tests[i].fill_helper &&
tests[i].fill_helper(&tests[i]) < 0)
@ -4894,6 +4957,11 @@ static __init void destroy_bpf_tests(void)
}
}
static bool exclude_test(int test_id)
{
return test_id < test_range[0] || test_id > test_range[1];
}
static __init int test_bpf(void)
{
int i, err_cnt = 0, pass_cnt = 0;
@ -4903,6 +4971,9 @@ static __init int test_bpf(void)
struct bpf_prog *fp;
int err;
if (exclude_test(i))
continue;
pr_info("#%d %s ", i, tests[i].descr);
fp = generate_filter(i, &err);