test_bpf: add module parameters to filter the tests to run.
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>
diff --git a/lib/test_bpf.c b/lib/test_bpf.c
index f18b7b8..8200980 100644
--- a/lib/test_bpf.c
+++ b/lib/test_bpf.c
@@ -4871,10 +4871,73 @@
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 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 @@
struct bpf_prog *fp;
int err;
+ if (exclude_test(i))
+ continue;
+
pr_info("#%d %s ", i, tests[i].descr);
fp = generate_filter(i, &err);